EP1013808A1 - Support et élément de guidage pour la voie de guidage des bandes à griffes dans un métier à griffes - Google Patents
Support et élément de guidage pour la voie de guidage des bandes à griffes dans un métier à griffes Download PDFInfo
- Publication number
- EP1013808A1 EP1013808A1 EP99125835A EP99125835A EP1013808A1 EP 1013808 A1 EP1013808 A1 EP 1013808A1 EP 99125835 A EP99125835 A EP 99125835A EP 99125835 A EP99125835 A EP 99125835A EP 1013808 A1 EP1013808 A1 EP 1013808A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- support
- guide element
- strap
- depression
- gripper
- 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.)
- Granted
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Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/27—Drive or guide mechanisms for weft inserting
- D03D47/277—Guide mechanisms
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/27—Drive or guide mechanisms for weft inserting
- D03D47/271—Rapiers
- D03D47/272—Rapier bands
Definitions
- the present invention concerns a support and guide element to form guide tracks for gripper straps in a gripper loom.
- Strap guide tracks of this type are known, in the sector, as "floating" tracks, as opposed to the conventional tracks wherein the strap bears with its bottom surface onto a suitable sliding surface formed on the sley, rubbing onto the lower warp yarns.
- the strap is instead supported, along its path, by a plurality of support and guide elements positioned at intervals along the track and fixed to the sley, so that the strap moves in an intermediate position of the loom shed, without thereby interfering either with the lower warp yarns or with the upper warp yarns.
- a strap guide track of this type is known, for example, from EP-A-275.479.
- This new type of track has provided a high number of advantages in respect of the previous tracks, thanks to the "open" configuration of the bracket type support and guide elements which, on one hand, leads to a considerably reduced number of warp yarn breakages determined by the yarn getting caught into the support and guide elements and, on the other hand, allows to make the surfaces of the support and guide elements, onto which slides the strap, with characteristics of perfect flatness and smoothness, thereby considerably reducing the phenomena of vibration and wear of the strap. Furthermore, the lack of a guiding support on the lateral surface of the strap prevents any possible roughening of its edges and, consequently, any possible negative effects due to pulling of the warp yarns sideways during motion of the strap.
- the EP-A-709.505 has still not fully solved the problems determined by the presence in the shed of deeply angled warp yarns, such as can be found either at the ends of the shed - where the fabric gets laterally deformed due to the tensioning action of the templates - or even inside the shed, due to some irregularity which may have occurred during weft yarn insertion.
- the sliding of the strap onto the support and guide elements may thus determine the breakage of the warp yarn, especially when this latter is positioned upstream of the tip of said elements in respect of the strap moving forward direction; in fact, in this case, the tip of the support and guide element imparts a pulling action on the warp yarn, preventing it from freely moving under the action of the advancing strap.
- the object of the present invention is to thus supply a support and guide element to form guide tracks for gripper straps in looms which, while providing all the advantages of the aforedescribed support and guide elements of prior art, also allows to eliminate or anyhow considerably reduce the drawback of the frequent warp yarn breakages in the presence of deeply angled warp yarns.
- said object is reached by means of a support and guide element t'o form guide tracks for gripper straps in a gripper loom, of the type comprising at least a horizontal sliding surface for the strap, projecting like a bracket from the body of the support and guide element, characterized in that said horizontal sliding surface for the strap comprises a central depression.
- Fig. 1 is an axonometric view, with an enlarged detail, showing a part of a loom weaving zone incorporating a known-type floating guide for the gripper straps;
- Fig. 2 is an axonometric view of a lower support and guide element, shaped as an upturned bracket, according to a first embodiment of the present invention
- Fig. 3 is a side elevation of the support and guide element shown in fig. 2;
- Fig. 4 is a plan view of the support and guide element of fig. 2;
- Fig. 5 shows three views - an axonometric view, a side elevation and a plan view, respectively - similar to those of figs. 2, 3 and 4, of a different embodiment of the lower support and guide element according to the present invention
- Fig. 6 shows three views, similar to those of fig. 5, of an upper support and guide element according to the embodiment of the invention illustrated in fig. 5.
- the assembly view of fig. 1 represents a part of the loom weaving zone incorporating a known-type floating guide, so as to clearly illustrate the arrangement of the single components and, in particular, of the support and guide elements according to the present invention.
- Fig. 1 shows the following loom components: the sley A comprising a rail R to which can be fixed the support and guide elements G; the reed P; the warp yarns O and the shed F formed by such yarns; a gripper S and the respective strap N; and, finally, the fabric T being woven.
- the support and guide elements G are of two types and, precisely, the lower support and guide elements Gi shaped as upturned brackets and the upper support and guide elements Gs shaped as downturned brackets, alternately positioned along the rail R.
- Figs. 2 to 4 show a lower support and guide element Gi, formed according to a first embodiment of the invention.
- the bracket horizontal surface of the support and guide elements according to the present invention comprises a central depression 1, so that the bracket surface, onto which slides the strap N, is reduced to two separate surfaces 2 and 3 between which is interposed said depression 1.
- the depression 1 has a characteristic saddle shape, which is radiused to said horizontal strap sliding surfaces 2 and 3 only sideways in respect of a plane of symmetry of the support and guide element G, whose trace is indicated in fig. 4 by the dashed line a.
- the two sliding surfaces 2 and 3 extend into said depression with arched buttresses 2a and 3a having substantially vertical walls, radiused only at their base to the saddle-shaped surface of the depression 1, as shown in fig, 3.
- This particular configuration of the depression 1 allows, on one hand, to obtain an overall area of the sliding surface of the strap N (sum of the areas of the surfaces 2 and 3) which is sufficiently wide as not to impart any excessive stresses to said strap and, on the other hand, to highly facilitate the shifting of any possible angled warp yarns O into one of the two positions illustrated in figs. 2 and 4, namely inside the depression 1 and away from the surfaces 2 and 3.
- Fig. 5 illustrates a second embodiment of the invention, of simpler construction, wherein the depression 1 has a V-shaped configuration and its radiusing edges to the surfaces 2 and 3 consist of segments perpendicular to the plane of symmetry of the support and guide element G (indicated in fig. 4 by the dashed line a ) and do not have the arched buttresses with vertical walls described with reference to the first embodiment of said support and guide element G.
- the first embodiment of the support and guide elements according to the present invention is particularly meant for yarns which are more likely to get entangled as, for example, in the case of natural yarns.
- the presence of the buttress 2a on the surface 2 facilitates the fast shifting of the warp yarn O, while the presence of the buttress 3a on the surface 3 prevents the warp yarns O - in the event they should be pulled by the gripper - from bearing onto said surface 3.
- the warp yarns O behave as described heretofore both in correspondence of the lower support and guide elements Gi - shown in figs. 2 to 5 - and in correspondence of the upper support and guide elements Gs.
- the configurations of the horizontal bracket surface of the upper support and guide elements Gs, and thus of the depression 1 provided therein, are in fact perfectly symmetrical to those described for the two embodiments of the lower bracket elements Gi and, for the sake of simplicity, are illustrated in fig. 6 merely with reference to the second embodiment of the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Treatment Of Fiber Materials (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI982808 | 1998-12-23 | ||
IT1998MI002808A IT1303652B1 (it) | 1998-12-23 | 1998-12-23 | Gancino per piste di guida dei nastri delle pinze in un telaio ditessitura a pinze |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1013808A1 true EP1013808A1 (fr) | 2000-06-28 |
EP1013808B1 EP1013808B1 (fr) | 2004-05-12 |
Family
ID=11381332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99125835A Expired - Lifetime EP1013808B1 (fr) | 1998-12-23 | 1999-12-23 | Support et élément de guidage pour la voie de guidage des bandes à griffes dans un métier à griffes |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1013808B1 (fr) |
AT (1) | ATE266754T1 (fr) |
DE (1) | DE69917197T2 (fr) |
ES (1) | ES2221295T3 (fr) |
IT (1) | IT1303652B1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004049254A1 (de) * | 2004-10-05 | 2006-04-06 | Picanol N.V. | Greifertransportelement für eine Webmaschine |
DE102004049256A1 (de) * | 2004-10-05 | 2006-04-06 | Picanol N.V. | Führungselemente für ein Greifertransportelement einer Webmaschine |
DE102004049255A1 (de) * | 2004-10-05 | 2006-04-06 | Picanol N.V. | Führungselemente für ein Greifertransportelement einer Webmaschine |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1397230A (fr) * | 1964-01-17 | 1965-04-30 | Perfectionnements aux machines à tisser à alimentation continue en trame | |
US3842869A (en) * | 1973-10-09 | 1974-10-22 | Rockwell International Corp | Tapeguide raceway for rapier loom |
FR2270356A1 (fr) * | 1972-03-04 | 1975-12-05 | Desveus Duran Magin | |
EP0137376A2 (fr) * | 1983-10-10 | 1985-04-17 | VAMATEX S.p.A. | Moyen pour guider les pinces portant le fil de trame le long de l'intérieur de la foule des métiers à tisser |
EP0275479A1 (fr) * | 1986-12-23 | 1988-07-27 | VAMATEX S.p.A. | Moyens pour guider le movement d'une paire de pince-trame dans la foule d'un métier à tisser |
DE29506561U1 (de) * | 1995-04-18 | 1995-06-08 | Textilma Ag | Webmaschine |
EP0709505A1 (fr) * | 1994-10-27 | 1996-05-01 | SOMET SOCIETA' MECCANICA TESSILE S.p.A. | Voie de guidage pour les bandes à griffes dans les métiers à tisser |
GB2314095A (en) * | 1996-06-14 | 1997-12-17 | Griffith Textile Mach Ltd | Gripper Axminster type loom |
-
1998
- 1998-12-23 IT IT1998MI002808A patent/IT1303652B1/it active
-
1999
- 1999-12-23 DE DE69917197T patent/DE69917197T2/de not_active Expired - Fee Related
- 1999-12-23 EP EP99125835A patent/EP1013808B1/fr not_active Expired - Lifetime
- 1999-12-23 ES ES99125835T patent/ES2221295T3/es not_active Expired - Lifetime
- 1999-12-23 AT AT99125835T patent/ATE266754T1/de not_active IP Right Cessation
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1397230A (fr) * | 1964-01-17 | 1965-04-30 | Perfectionnements aux machines à tisser à alimentation continue en trame | |
FR2270356A1 (fr) * | 1972-03-04 | 1975-12-05 | Desveus Duran Magin | |
US3842869A (en) * | 1973-10-09 | 1974-10-22 | Rockwell International Corp | Tapeguide raceway for rapier loom |
EP0137376A2 (fr) * | 1983-10-10 | 1985-04-17 | VAMATEX S.p.A. | Moyen pour guider les pinces portant le fil de trame le long de l'intérieur de la foule des métiers à tisser |
EP0275479A1 (fr) * | 1986-12-23 | 1988-07-27 | VAMATEX S.p.A. | Moyens pour guider le movement d'une paire de pince-trame dans la foule d'un métier à tisser |
EP0709505A1 (fr) * | 1994-10-27 | 1996-05-01 | SOMET SOCIETA' MECCANICA TESSILE S.p.A. | Voie de guidage pour les bandes à griffes dans les métiers à tisser |
DE29506561U1 (de) * | 1995-04-18 | 1995-06-08 | Textilma Ag | Webmaschine |
GB2314095A (en) * | 1996-06-14 | 1997-12-17 | Griffith Textile Mach Ltd | Gripper Axminster type loom |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004049254A1 (de) * | 2004-10-05 | 2006-04-06 | Picanol N.V. | Greifertransportelement für eine Webmaschine |
DE102004049256A1 (de) * | 2004-10-05 | 2006-04-06 | Picanol N.V. | Führungselemente für ein Greifertransportelement einer Webmaschine |
DE102004049255A1 (de) * | 2004-10-05 | 2006-04-06 | Picanol N.V. | Führungselemente für ein Greifertransportelement einer Webmaschine |
DE102004049255B4 (de) * | 2004-10-05 | 2013-07-18 | Picanol | Führungselemente für ein Greifertransportelement einer Webmaschine |
DE102004049254B4 (de) * | 2004-10-05 | 2013-07-25 | Picanol | Greifertransportelement für eine Webmaschine |
DE102004049256B4 (de) * | 2004-10-05 | 2014-01-02 | Picanol | Führungselemente für ein Greifertransportelement einer Webmaschine |
Also Published As
Publication number | Publication date |
---|---|
ITMI982808A1 (it) | 2000-06-23 |
ATE266754T1 (de) | 2004-05-15 |
DE69917197D1 (de) | 2004-06-17 |
IT1303652B1 (it) | 2001-02-21 |
DE69917197T2 (de) | 2005-05-19 |
ES2221295T3 (es) | 2004-12-16 |
EP1013808B1 (fr) | 2004-05-12 |
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