EP0896075A2 - Schussfadenzubringvorrichtung für Webmaschinen - Google Patents
Schussfadenzubringvorrichtung für Webmaschinen Download PDFInfo
- Publication number
- EP0896075A2 EP0896075A2 EP98114840A EP98114840A EP0896075A2 EP 0896075 A2 EP0896075 A2 EP 0896075A2 EP 98114840 A EP98114840 A EP 98114840A EP 98114840 A EP98114840 A EP 98114840A EP 0896075 A2 EP0896075 A2 EP 0896075A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- rods
- rod
- weft yarns
- presenting device
- motors
- 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
Links
- 238000009941 weaving Methods 0.000 title 1
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 206010010904 Convulsion Diseases 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Images
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
- D03D47/34—Handling the weft between bulk storage and weft-inserting means
- D03D47/38—Weft pattern mechanisms
Definitions
- the present invention concerns a weft presenting device for looms.
- the weft yarn insertions, and the exchanges of position of the warp yarns obtained through the weave devices suitably follow one another and lead to the forming of the desired fabric.
- Such devices consist of devices performing the function to select the weft yarns to be inserted, and present them to the carrying grippers which provide for their insertion.
- Such devices substantially comprise one or more rods provided, at their working end, with an eyelet through which is let a respective weft yarn: the movement of the rods involves shifting the eyelets and thus the position of the corresponding weft yarns sliding therethrough.
- the weft yarns are thereby alternately shifted from a position of rest, away from the trajectory of the gripper, into a "presenting" position in which they can be caught by the carrying gripper and carried towards and into the warp shed.
- the EP-A1-598.264 in the name of PICANOL N.V., discloses a presenting device wherein the single rods are independently controlled by electric motors, through cam mechanisms.
- the electric motors do not perform continuous, but alternate rotations, in one direction and in the other, between a position corresponding to the top dead center and a position corresponding to the bottom dead center of the respective rod. Hence, the adjustment of such motors requires a complicated electronic control system.
- the head of the rod namely its end connected to the cam mechanism, follows a curved trajectory involving the surrounding area: it is thus necessary to provide for a sufficient lateral spacing between one rod and the next, in order to prevent a mutual interference thereof.
- the EP-A1-598.264 provides for the single rods, with the respective drive mechanisms, to be mounted on corresponding support plates, so as to form modules positioned one next to the other without any interferences: it is evident that such a multiple presenting device covers on the whole a considerable space sidewise, which - as already stated - is highly undesirable.
- the trajectory of the rod eyelet end is not rectilinear, but is also curved. This, besides determining bounds in the mutual arrangement of the rods, forces to adopt oscillating guide bushes, which may cause seizures and jammings and which anyhow represent a delicate and costly component.
- the EP-B1-461.524 in the name of the present Applicant, discloses a presenting device wherein the rods are singly controlled by electric linear motors.
- the object of the present invention is to thus supply a weft presenting device apt to fully overcome the aforecited drawbacks, and particularly a device allowing to singly control each weft yarn presenting rod, both in synchronism with the working motion of the loom and independently therefrom, while simultaneously providing an easy control of the device, a simple and economic structure and, at the same time, a modularity and compactedness which allow to obtain a multiple presenting device involving minimum overall dimensions and competitive costs.
- a device to select and present weft yarns to a carrying gripper in looms - of the type comprising a set of rods having an eyelet to let the weft yarns through, rod guiding elements and a rotary driving motor for each rod - in which exact straight-line guide mechanisms are interposed between the driving motors and said rods.
- the weft presenting device is positioned in correspondence of the loom side of weft yarn insertion. It comprises a set of weft carrying rods 1 provided, at their working end 1a (figs. 2A and 2B) with an eyelet 2 to let the weft yarn through, said rods 1 being guided into guide bushes 3.
- the shifting of a rod 1 leads the corresponding weft yarn T, sliding through the respective eyelet 2, to interfere with the trajectory followed by the loom carrying gripper N, so as to allow this latter to clamp said weft yarn and insert it into the warp shed.
- each rod 1 of the presenting device is connected, through its head 1b, to an outlet member 10 of a driving mechanism 11 controlled by a respective electric motor M.
- the motor M is preferably an electric step-by-step motor.
- the driving mechanism 11 reproduces an exact straight-line guide.
- the mechanism 11 of the present invention is preferably that illustrated in figs. 4 and 5.
- a housing C - on which the electric step-by-step motor M is mounted - contains the elements forming the exact straight-line guide.
- a rotor 12, rotatably mounted on a bearing 13, is fixed to the outlet shaft 14 of the electric motor M.
- a planetary gear 15 is rotatably mounted on the rotor 12 by way of a support spindle 15a positioned parallel, but eccentric, in respect of the rotation axis of the shaft 14.
- the gear 15 has an external toothing 16 meshing with an internal gear 17 applied into or formed in one piece with the housing C.
- Said driving mechanism 11 allows to change the purely rotary motion of the motor shaft 14 into a reciprocating straightaway motion of the pin 10 (figs. 4B and 4C); in fact, the rolling of the planetary gear 15 over the internal gear 17 leads the pin 10 to follow a rectilinear trajectory (fig. 4C) while spinning, thus performing a full rotation for each rotation of the motor shaft 14.
- the pin 10 follows a law which is perfectly sinusoidal in time, if the rotation of the electric motor M is continuous and constant, but it may follow different laws by suitably controlling the electric motor M.
- This mechanism 11 is to be able to perform a reciprocating straightaway motion without the help of cam mechanisms, or other type of eccentrics, which forcedly require to reverse the rotation of the motor in order to obtain a reciprocating motion. This results into a substantially easy control of the motor M, thereby reaching a first object of the present invention.
- the perfectly rectilinear movement of the rods allows to adopt fixed bushes 3 - rather than oscillating bushes, as in prior art - thereby reaching a second object of the present invention.
- Fig. 5 illustrates the two opposite positions of the planetary gear 15, in correspondence of the two end-of-stroke positions of the rod 1.
- the rod 1 performs a straightaway motion along a vertical axis (in respect of the plane of the drawing).
- Fig. 3 shows a weft presenting device with nine rods, wherein all the units are mounted, drawn close, onto a same support plate P.
- the different inclination of the rods 1 allows the various weft yarns, inserted into the single eyelets 2, to substantially converge in the same restricted area (shown by small circles). This last characteristic is very important to make sure that the weft yarns are presented in an optimal zone, to be caught by the carrying gripper N.
- the keying of the blocks 18 on the respective spindles 15a can be identical for all the rods 1 (as shown, for example, in fig. 5) and the different inclinations of the rods are obtained by mounting the driving mechanisms 11 on the support plate P according to different angles (this condition is not shown) instead of equal angles (as in fig. 3).
- This last mounting arrangement is advantageous, in that it does not require a specific keying of the blocks 18 for each position taken up by the mechanisms 11, and thus allows an easy and prompt interchangeableness of such driving mechanisms.
- the device according to the invention is easy to assemble and disassemble, to the full advantage of its maintenance.
- a proximity sensor S detects the position of the head 1b of the rod 1, then timing the working motion of the loom with the rotation of the motor M.
- the electronic control of the electric step-by-step motor M also allows to obtain motion laws for the rods 1 which perfectly fulfil the requirements of the specific product having to be woven, without having to replace or modify any mechanical component of the system.
- the various units of the weft presenting device - instead of being drawn close onto a same support plate, as in fig. 3 - could be positioned according to different geometries, at least partially opposite one to the other, or mutually offset.
- the driving mechanism 11 has been described herein, other embodiments can be conceived for the exact straight-line guide, all falling within the protection field of the present invention.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT97MI001900 IT1293828B1 (it) | 1997-08-07 | 1997-08-07 | Presentatrice di trama per telai di tessitura |
ITMI971900 | 1997-08-07 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0896075A2 true EP0896075A2 (de) | 1999-02-10 |
EP0896075A3 EP0896075A3 (de) | 1999-06-16 |
EP0896075B1 EP0896075B1 (de) | 2003-10-01 |
Family
ID=11377738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19980114840 Expired - Lifetime EP0896075B1 (de) | 1997-08-07 | 1998-08-06 | Schussfadenzubringvorrichtung für Webmaschinen |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0896075B1 (de) |
DE (1) | DE69818588T2 (de) |
ES (1) | ES2209013T3 (de) |
IT (1) | IT1293828B1 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1353000A1 (de) * | 2002-04-10 | 2003-10-15 | Lin, Chen-Hui | Schussfadenwähler für eine Bandwebmaschine |
EP1500731A1 (de) * | 2003-07-10 | 2005-01-26 | Promatech S.p.A. | Schussfadenzubringvorrichtung für Webmaschinen mit einer einzigen Zubringstange |
EP1609900A1 (de) * | 2004-06-25 | 2005-12-28 | Luigi Omodeo Zorini | Nadelwebmaschine mit automatischem Wechsel des Schussfadens |
EP1777327A1 (de) * | 2005-10-20 | 2007-04-25 | Luigi Omodeo Zorini | Nadelwebmaschine mit automatischem Schussfadenwechsel |
ITUB20160421A1 (it) * | 2016-02-01 | 2016-05-01 | Rinaldo Sperotto | PRESENTATRICE ROTATIVA per macchine da tessere a preselezione meccanica e comando elettronico |
EP4310234A1 (de) * | 2022-07-19 | 2024-01-24 | Picanol | Vorrichtung zum auswählen und präsentieren von schussfäden |
EP4310233A1 (de) | 2022-07-19 | 2024-01-24 | Picanol | Vorrichtung zum auswählen und präsentieren von schussfäden |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2644648A1 (de) * | 1975-10-03 | 1977-04-14 | Somet Soc Mec Tessile | Vorrichtung zum darbieten und uebergeben des schussfadens fuer webmaschinen mit kontinuierlicher schussfadenzufuehrung |
GB2099863A (en) * | 1981-06-09 | 1982-12-15 | Saurer Ag Adolph | Weft selectors |
EP0362089A1 (de) * | 1988-09-27 | 1990-04-04 | Pétrus Marsande | Schussfadenzufuhrvorrichtung für schützenlose Webmaschinen |
EP0398399A1 (de) * | 1989-05-18 | 1990-11-22 | Picanol N.V. | Vorrichtung zum Zuführen von Schussfäden in Webmaschinen |
EP0478986A1 (de) * | 1990-10-05 | 1992-04-08 | Lindauer Dornier Gesellschaft M.B.H | Schussfadenauswahl- und Zuführvorrichtung für Webmaschinen |
DE4325905C1 (de) * | 1993-08-02 | 1994-10-06 | Dornier Gmbh Lindauer | Vorrichtung zum Zuführen von Schußfäden zu einem Schußfadeneintragorgan in Webmaschinen |
EP0763613A2 (de) * | 1992-11-16 | 1997-03-19 | Picanol N.V. | Vorrichtung zum Auswählen und Zustellen von Schussfäden für eine Webmaschine |
-
1997
- 1997-08-07 IT IT97MI001900 patent/IT1293828B1/it active IP Right Grant
-
1998
- 1998-08-06 EP EP19980114840 patent/EP0896075B1/de not_active Expired - Lifetime
- 1998-08-06 DE DE69818588T patent/DE69818588T2/de not_active Expired - Lifetime
- 1998-08-06 ES ES98114840T patent/ES2209013T3/es not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2644648A1 (de) * | 1975-10-03 | 1977-04-14 | Somet Soc Mec Tessile | Vorrichtung zum darbieten und uebergeben des schussfadens fuer webmaschinen mit kontinuierlicher schussfadenzufuehrung |
GB2099863A (en) * | 1981-06-09 | 1982-12-15 | Saurer Ag Adolph | Weft selectors |
EP0362089A1 (de) * | 1988-09-27 | 1990-04-04 | Pétrus Marsande | Schussfadenzufuhrvorrichtung für schützenlose Webmaschinen |
EP0398399A1 (de) * | 1989-05-18 | 1990-11-22 | Picanol N.V. | Vorrichtung zum Zuführen von Schussfäden in Webmaschinen |
EP0478986A1 (de) * | 1990-10-05 | 1992-04-08 | Lindauer Dornier Gesellschaft M.B.H | Schussfadenauswahl- und Zuführvorrichtung für Webmaschinen |
EP0763613A2 (de) * | 1992-11-16 | 1997-03-19 | Picanol N.V. | Vorrichtung zum Auswählen und Zustellen von Schussfäden für eine Webmaschine |
DE4325905C1 (de) * | 1993-08-02 | 1994-10-06 | Dornier Gmbh Lindauer | Vorrichtung zum Zuführen von Schußfäden zu einem Schußfadeneintragorgan in Webmaschinen |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1353000A1 (de) * | 2002-04-10 | 2003-10-15 | Lin, Chen-Hui | Schussfadenwähler für eine Bandwebmaschine |
EP1500731A1 (de) * | 2003-07-10 | 2005-01-26 | Promatech S.p.A. | Schussfadenzubringvorrichtung für Webmaschinen mit einer einzigen Zubringstange |
EP1609900A1 (de) * | 2004-06-25 | 2005-12-28 | Luigi Omodeo Zorini | Nadelwebmaschine mit automatischem Wechsel des Schussfadens |
US7073540B2 (en) | 2004-06-25 | 2006-07-11 | Luigi Omodeo Zorini | Needle loom with automatic change of the weft thread |
EP1777327A1 (de) * | 2005-10-20 | 2007-04-25 | Luigi Omodeo Zorini | Nadelwebmaschine mit automatischem Schussfadenwechsel |
US7441567B2 (en) | 2005-10-20 | 2008-10-28 | Luigi Omodeo Zorini | Needle loom with automatic change of the weft thread |
ITUB20160421A1 (it) * | 2016-02-01 | 2016-05-01 | Rinaldo Sperotto | PRESENTATRICE ROTATIVA per macchine da tessere a preselezione meccanica e comando elettronico |
EP4310234A1 (de) * | 2022-07-19 | 2024-01-24 | Picanol | Vorrichtung zum auswählen und präsentieren von schussfäden |
EP4310233A1 (de) | 2022-07-19 | 2024-01-24 | Picanol | Vorrichtung zum auswählen und präsentieren von schussfäden |
WO2024017542A1 (en) * | 2022-07-19 | 2024-01-25 | Picanol | Device for selecting and presenting weft threads |
WO2024017541A1 (en) | 2022-07-19 | 2024-01-25 | Picanol | Device for selecting and presenting weft threads |
BE1030686A1 (nl) | 2022-07-19 | 2024-01-26 | Picanol | Inrichting voor het selecteren en presenteren van inslagdraden |
BE1030688B1 (nl) * | 2022-07-19 | 2024-06-20 | Picanol | Inrichting voor het selecteren en presenteren van weefdraden |
Also Published As
Publication number | Publication date |
---|---|
DE69818588D1 (de) | 2003-11-06 |
DE69818588T2 (de) | 2004-08-05 |
ES2209013T3 (es) | 2004-06-16 |
EP0896075B1 (de) | 2003-10-01 |
EP0896075A3 (de) | 1999-06-16 |
IT1293828B1 (it) | 1999-03-10 |
ITMI971900A1 (it) | 1999-02-07 |
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