EP1072707A1 - Vorrichtung zur Fadenbremsenbetätigung, insbesondere für Webmaschinen und dergleichen - Google Patents
Vorrichtung zur Fadenbremsenbetätigung, insbesondere für Webmaschinen und dergleichen Download PDFInfo
- Publication number
- EP1072707A1 EP1072707A1 EP00110982A EP00110982A EP1072707A1 EP 1072707 A1 EP1072707 A1 EP 1072707A1 EP 00110982 A EP00110982 A EP 00110982A EP 00110982 A EP00110982 A EP 00110982A EP 1072707 A1 EP1072707 A1 EP 1072707A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- actuation device
- linear motor
- weft
- braking
- 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
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
- B65H59/20—Co-operating surfaces mounted for relative movement
- B65H59/22—Co-operating surfaces mounted for relative movement and arranged to apply pressure to material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
- B65H59/20—Co-operating surfaces mounted for relative movement
- B65H59/22—Co-operating surfaces mounted for relative movement and arranged to apply pressure to material
- B65H59/225—Tension discs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
- B65H59/20—Co-operating surfaces mounted for relative movement
- B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
- B65H59/28—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged towards each other
- B65H59/30—Surfaces movable automatically to compensate for variation in tension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2555/00—Actuating means
- B65H2555/10—Actuating means linear
- B65H2555/13—Actuating means linear magnetic, e.g. induction motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Definitions
- the present invention relates to a welt brake actuation device, particularly for weaving looms and the like. More particularly, the invention relates to a weft brake actuation device for shuttle-less looms, particularly gripper looms, projectile looms, and air-jet looms.
- the welt thread is unwound from a spool of welt thread which is arranged upstream of a welt thread feeder, from which the thread is then sent to the loom for weaving.
- Welt brakes are generally provided between the spool from which the welt thread unwinds and the feeder, and between the feeder and the loom, and are designed to modulate the tension of the welt thread so as to adapt it to the weaving requirements.
- Modulation of the welt thread is thus performed by means of devices which brake the unwinding of the welt thread from the spool, before it is sent to the welt feeder, and the feeding of the weft thread from the feeder to the weaving loom.
- Braking the welt thread is an essential element of weaving with modern looms, which currently achieve average speeds of up to 1800 m/min (shuttle-less looms).
- the high average speeds of the weft make it necessary to brake said weft in very short times, with interventions on the order of a few milliseconds.
- a first method entails the use of a current-driven coil which moves in a fixed magnetic field.
- the weft brake is directly connected to the coil and interacts with the weft thread in order to perform braking.
- the coil is current-driven by means of a pair of wires which are directly connected to the coil.
- a second weft brake driving method provides for the use of step motors, which however are not directly connected to the weft brake but provide indirect transmission by using cams.
- the aim of the present invention is to provide a weft brake actuation device, particularly for weaving looms and the like, in which the intervention time of the weft brake is greatly reduced with respect to conventional weft brakes.
- an object of the present invention is to provide a weft brake actuation device in which, for an equal driving current of the actuation device, the electrodynamic yield of the device is higher than the yield of conventional devices.
- Another object of the present invention is to provide a weft brake actuation device, particularly for weaving looms and the like, having high precision in weft brake actuation.
- Another object of the present invention is to provide a weft brake actuation device in which it is possible to control the movement actually imparted to the weft brake, so as to adjust it substantially in real time.
- Another object of the present invention is to provide a weft brake actuation device, particularly for weaving looms and the like, in which the transmission of the actuation from the actuation device to the weft brake is direct, without interposed mechanical elements such as cams and the like.
- Another object of the present invention is to provide a weft brake actuation device which is highly reliable, relatively easy to manufacture and at low cost.
- a weft brake actuation device particularly for weaving looms and the like, characterized in that it comprises a linear motor having a rotor constituted by a shaft which is keyed on a braking device, the movement of said shaft allowing to modulate the braking action of said braking device on a weft thread.
- the weft brake actuation device generally designated by the reference numeral 1, comprises a rotor constituted by a shaft 2 of non-magnetic material which is engaged with a supporting element 3 whereon two magnetic rings (for example made of neodymium) are fitted; the rings are magnetized radially and in opposite directions.
- two magnetic rings for example made of neodymium
- the two magnetic rings are designated by the reference numerals 10 and 11 and are fitted on a ring 9 made of magnetic material (for example iron), which is in turn fitted on a spool 13 (made of plastics) which is rigidly coupled to the shaft 2.
- a ring 9 made of magnetic material (for example iron)
- a spool 13 made of plastics
- the stator of the linear motor 1 is constituted by an outer enclosure 20, through which the shaft 2 passes coaxially, and by at least two pole shoes 6 and 8 which surround two coils 4 and 5.
- the linear motor has an additional pole shoe (third pole 7) which highly improves the efficiency of the motor.
- a braking device known per se is directly keyed onto the shaft 2.
- the braking device designated by the reference numeral 30, comprises a rod-like element 31, to the ends of which a flexible element 32 is connected; the flexible element is suitable to produce interference against the weft thread T, compressing the weft thread against a fixed abutment element 33.
- the modulation of the braking action of the braking device 30 is performed by acting on a movement of the braking device 30 at right angles to the extension of the weft thread T.
- the movement of the braking device 30 is achieved by acting on the movement of the shaft 2 that constitutes the rotor of the linear motor 1.
- the magnetic flux generated by the magnets 10 and 11 concatenates with the coils 4 and 5, and by making current flow in the coils one achieves a movement of the shaft 2 in one direction or the other, according to the direction of the current.
- the actuation device according to the invention can also be provided with means for measuring the movement of the motor, i.e., the movement of the shaft 2 which directly actuates the braking device.
- the means for detecting the movement of the motor are conveniently constituted by a sensor device 24 which is arranged so as to face a magnet 25 rigidly coupled to the shaft 2 of the motor.
- the sensor device 24 is sensitive to the magnetic field and measures the distance between it and the magnet 25.
- the actuation of the linear motor 1 can be conditioned by a signal which originates from the loom, or rather from a sensor, schematically designated by the reference numeral 35, which directly measures the actual tension of the weft thread T and, by means of a microprocessor designated by the reference numeral 36, adjusts the braking action of the braking device according to the parameters supplied by the loom or according to the tension of the weft thread T.
- the command issued by the microprocessor 36 consists of a current signal which excites the coils 4 and 5.
- the use of a linear motor allows to have high efficiency in transmitting the motion imparted by the shaft 2 to the braking device 30, since the connection between the two elements is direct, without interposed cams and the like.
- the electrodynamic yield i.e. the force that can be developed by the motor
- the ratio between dissipated power and performance is highly in favor of the linear motor.
- Figure 2 illustrates a second embodiment of the braking device 30, designated here by the reference numeral 40, in which the weft thread T is braked by means of the movement of a shoe 41 which is keyed on the shaft 2 of the linear motor 1 and abuts against a fixed abutment shoe 42.
- Shoe 42 too, can be movable and can be kept in position by a spring.
- Figure 3 is a view of another embodiment of the braking device, designated here by the reference numeral 50, which is constituted by a plurality of rollers 51 supported by a bar element 52 keyed on the shaft 2 of the linear motor 1.
- Additional rollers 51 are arranged so as to face the first rollers 51 and the weft threads T pass between the first rollers and the second rollers.
- the movement of the shaft 2 allows a movement of the bar element 52 that supports the first rollers 51 so that the first rollers and the second rollers 51, as shown in Figure 4 (while Figure 3 illustrates the first operating position of the third embodiment of the braking device) brake the weft thread T, which passes around the first and second rollers 51, forming loops which accordingly brake it.
- the braking actuation device according to the invention fully achieves the intended aim, since it allows a shorter intervention time for the actuation of the braking device than conventional devices can ensure. Furthermore, the direct connection between the motor shaft and the braking device allows to provide a direct motion transmission and to reduce manufacturing costs due to the absence of additional mechanical elements.
- linear motor requires a low driving current in order to produce an electrodynamic force which is greater than the force that can be obtained by driving known types of actuation devices with the same current.
- the power consumed by the actuation device according to the invention is lower than the power consumed by conventional devices.
- the direct driving of the braking device by means of the shaft of the linear motor, allows to easily determine the movement performed by said shaft and therefore to determine at all times the braking force actually applied by the braking device to the weft thread.
- the determination of the actual braking force further allows, by comparison with the tension of the weft thread, to determine corrections substantially in real time of the movement of the shaft of the linear motor so as to provide instant-by-instant correction of the braking force applied by the braking device in order to adapt it to an intended braking force.
- the materials employed may be any according to requirements and to the state of the art.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Warping, Beaming, Or Leasing (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITTO990458 IT1308066B1 (it) | 1999-06-01 | 1999-06-01 | Dispositivo di comando di frenatrama, particolarmente per telaidi tessitura e simili |
ITTO990458 | 1999-06-01 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1072707A1 true EP1072707A1 (de) | 2001-01-31 |
EP1072707B1 EP1072707B1 (de) | 2004-07-28 |
EP1072707B2 EP1072707B2 (de) | 2007-09-26 |
Family
ID=11417854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00110982A Expired - Lifetime EP1072707B2 (de) | 1999-06-01 | 2000-05-29 | Vorrichtung zur Fadenbremsenbetätigung, insbesondere für Webmaschinen und dergleichen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1072707B2 (de) |
DE (1) | DE60012434T3 (de) |
IT (1) | IT1308066B1 (de) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1136605A2 (de) * | 2000-03-18 | 2001-09-26 | Lindauer Dornier Gesellschaft M.B.H | Fadenbremse, insbesondere Schlussfadenbremse für Webmaschinen |
WO2006027233A1 (de) * | 2004-09-10 | 2006-03-16 | Iro Ab | Fadenbremsvorrichtung |
EP1811068A1 (de) * | 2006-01-24 | 2007-07-25 | Sultex AG | Gesteuerte Fadenbremse |
EP2186932A1 (de) | 2008-11-13 | 2010-05-19 | L.G.L. Electronics S.p.A. | Fadeliefervorrichtung für Textilmaschinen mit Steuerung der Zuführungsparameter |
EP2354070A1 (de) | 2010-02-01 | 2011-08-10 | Iro Ab | Garnspanner |
EP2644550A1 (de) * | 2012-03-27 | 2013-10-02 | Savio Macchine Tessili S.p.A. | Selbsteinstellende Spannvorrichtung für Wickelgarne |
ITTO20130616A1 (it) * | 2013-07-22 | 2015-01-23 | Lgl Electronics Spa | Alimentatore di filato munito di tamburo avvolgi-trama e di dispositivo frena-trama controllato in retroazione |
RU2602616C2 (ru) * | 2015-03-24 | 2016-11-20 | Закрытое акционерное общество "ТРИ-Д" (ЗАО "ТРИ-Д") | Устройство регулирования натяжения нитевидного материала |
IT201700014592A1 (it) * | 2017-02-10 | 2018-08-10 | Roj S R L | Freno elettromagnetico di arresto del filo di trama in macchine tessili |
CN116553299A (zh) * | 2023-06-25 | 2023-08-08 | 无锡长江精密纺织有限公司 | 络筒机栅式张力调节装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103966735B (zh) * | 2014-05-22 | 2015-12-02 | 石狮市台瑞精密机械有限公司 | 一种断纱张力保持装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0467059A1 (de) * | 1990-06-11 | 1992-01-22 | NUOVA VAMATEX S.p.A. | Vorrichtung zur Spannungsregulierung und Rückziehen von Schussgarn in Webmaschinen |
EP0622485A1 (de) * | 1993-04-08 | 1994-11-02 | L.G.L. ELECTRONICS S.p.A. | Vorrichtung zum modulierten Bremsen des Fadens für Schussfadenliefervorrichtungen |
US5738295A (en) * | 1995-11-28 | 1998-04-14 | W. Schlafhorst Ag & Co. | Process and apparatus for tensioning a traveling thread in a textile machine by means of a comb tensioner |
EP0972734A1 (de) * | 1998-07-17 | 2000-01-19 | L.G.L. Electronics S.p.A. | Modulierte Schussfadenbremse für Textilmaschinen |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH570066A5 (de) † | 1973-05-18 | 1975-11-28 | Tesalon Anstalt | |
DE2621272C2 (de) † | 1975-05-16 | 1982-11-11 | Regie Nationale Des Usines Renault, 92109 Boulogne-Billancourt, Hauts-De-Seine | Elektromagnetische Betätigungsvorrichtung |
IT1227077B (it) † | 1988-09-08 | 1991-03-14 | Vamatex Spa | Sistema per controllare la tensione della trama alimentata ad un telaio tessile senza navette. |
DE4131652A1 (de) † | 1991-09-23 | 1993-04-01 | Iro Ab | Webmaschine und eintragbremse fuer webmaschinen |
DE19625760A1 (de) † | 1996-06-27 | 1998-01-02 | Sobrevin | Fadenbremse |
DE19839272B4 (de) † | 1997-09-11 | 2007-02-01 | Iro Sweden Ab | Steuerbare Fadenbremse |
-
1999
- 1999-06-01 IT ITTO990458 patent/IT1308066B1/it active
-
2000
- 2000-05-29 EP EP00110982A patent/EP1072707B2/de not_active Expired - Lifetime
- 2000-05-29 DE DE2000612434 patent/DE60012434T3/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0467059A1 (de) * | 1990-06-11 | 1992-01-22 | NUOVA VAMATEX S.p.A. | Vorrichtung zur Spannungsregulierung und Rückziehen von Schussgarn in Webmaschinen |
EP0622485A1 (de) * | 1993-04-08 | 1994-11-02 | L.G.L. ELECTRONICS S.p.A. | Vorrichtung zum modulierten Bremsen des Fadens für Schussfadenliefervorrichtungen |
US5738295A (en) * | 1995-11-28 | 1998-04-14 | W. Schlafhorst Ag & Co. | Process and apparatus for tensioning a traveling thread in a textile machine by means of a comb tensioner |
EP0972734A1 (de) * | 1998-07-17 | 2000-01-19 | L.G.L. Electronics S.p.A. | Modulierte Schussfadenbremse für Textilmaschinen |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1136605A2 (de) * | 2000-03-18 | 2001-09-26 | Lindauer Dornier Gesellschaft M.B.H | Fadenbremse, insbesondere Schlussfadenbremse für Webmaschinen |
EP1136605A3 (de) * | 2000-03-18 | 2003-10-01 | Lindauer Dornier Gesellschaft M.B.H | Fadenbremse, insbesondere Schlussfadenbremse für Webmaschinen |
WO2006027233A1 (de) * | 2004-09-10 | 2006-03-16 | Iro Ab | Fadenbremsvorrichtung |
US7661621B2 (en) | 2004-09-10 | 2010-02-16 | Iro Ab | Thread tensioner |
CN101039859B (zh) * | 2004-09-10 | 2013-07-03 | Iro有限公司 | 线张紧装置 |
EP1811068A1 (de) * | 2006-01-24 | 2007-07-25 | Sultex AG | Gesteuerte Fadenbremse |
EP2186932A1 (de) | 2008-11-13 | 2010-05-19 | L.G.L. Electronics S.p.A. | Fadeliefervorrichtung für Textilmaschinen mit Steuerung der Zuführungsparameter |
EP2354070A1 (de) | 2010-02-01 | 2011-08-10 | Iro Ab | Garnspanner |
EP2644550A1 (de) * | 2012-03-27 | 2013-10-02 | Savio Macchine Tessili S.p.A. | Selbsteinstellende Spannvorrichtung für Wickelgarne |
ITTO20130616A1 (it) * | 2013-07-22 | 2015-01-23 | Lgl Electronics Spa | Alimentatore di filato munito di tamburo avvolgi-trama e di dispositivo frena-trama controllato in retroazione |
EP2829647A1 (de) * | 2013-07-22 | 2015-01-28 | L.G.L. Electronics S.p.A. | Garnzuführvorrichtung mit Schussfaden-Wickeltrommel und feedbackgesteuerter Schussfaden-Bremsvorrichtung |
CN104326308A (zh) * | 2013-07-22 | 2015-02-04 | 爱吉尔电子股份公司 | 设有纬线卷绕转筒和受反馈控制的纬线制动装置的纱线馈送器 |
RU2602616C2 (ru) * | 2015-03-24 | 2016-11-20 | Закрытое акционерное общество "ТРИ-Д" (ЗАО "ТРИ-Д") | Устройство регулирования натяжения нитевидного материала |
IT201700014592A1 (it) * | 2017-02-10 | 2018-08-10 | Roj S R L | Freno elettromagnetico di arresto del filo di trama in macchine tessili |
CN116553299A (zh) * | 2023-06-25 | 2023-08-08 | 无锡长江精密纺织有限公司 | 络筒机栅式张力调节装置 |
CN116553299B (zh) * | 2023-06-25 | 2023-10-20 | 无锡长江精密纺织有限公司 | 络筒机栅式张力调节装置 |
Also Published As
Publication number | Publication date |
---|---|
EP1072707B2 (de) | 2007-09-26 |
EP1072707B1 (de) | 2004-07-28 |
DE60012434T3 (de) | 2008-04-17 |
DE60012434D1 (de) | 2004-09-02 |
DE60012434T2 (de) | 2004-12-02 |
IT1308066B1 (it) | 2001-11-29 |
ITTO990458A1 (it) | 2000-12-01 |
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