EP1154946A1 - Vorrichtung und verfahren zum variierenden bremsen eines laufenden fadens - Google Patents
Vorrichtung und verfahren zum variierenden bremsen eines laufenden fadensInfo
- Publication number
- EP1154946A1 EP1154946A1 EP00907612A EP00907612A EP1154946A1 EP 1154946 A1 EP1154946 A1 EP 1154946A1 EP 00907612 A EP00907612 A EP 00907612A EP 00907612 A EP00907612 A EP 00907612A EP 1154946 A1 EP1154946 A1 EP 1154946A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuator
- braking effect
- thread
- force
- 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
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
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Definitions
- the invention relates to a device of the type specified in the preamble of claim 1 and a method according to the preamble of claim 13.
- a controlled thread brake is expediently used in a rapier or projectile weaving machine in order to give the thread entered in the shed a specific tension profile which is important for an optimal insertion process and which varies during the insertion process. For example, in a rapier weaving machine, it is advisable to brake harder at the start of the entry, to reduce or passivate the braking effect via the subsequent acceleration phase of the rapier gripper, to brake again more strongly during the transfer phase from the rapier rapier to the slave rapier, at least to reduce the braking effect via the acceleration phase of the slave rapier or to passivate, and to brake again more strongly towards the end of the entry until the thread entered is released by the slave gripper.
- braking is either not carried out at all or with a single braking force value set on the adjusting device.
- the braking force can be selected manually on the adjusting device. A change in force is not possible during an entry process because of the short time available. Since the braking force is the same for all braking phases, it represents a compromise, so that the braking effect can be too low for one operating phase and too strong for another. It is namely expedient to brake with different braking effects during different phases of an insertion process.
- the invention has for its object to provide a device of the type mentioned, with which an optimally timed thread tension profile can be generated in a structurally simple manner during each entry process, or to specify a method with which an optimal thread tension profile can be achieved with each entry process.
- the second actuator adjusts the force determining the braking action only when the braking action is passivated, the braking action required in each case is available exactly at the point in time or at the angular position of the main shaft of the weaving machine at which or at which the first actuator the braking action activated quickly. Since the time interval between two operating phases with activated braking effect can be used to vary the force, and the first actuator can activate or passivate the respective braking effect extremely quickly, an optimal tension profile of the thread can be achieved, especially by the fact that the first and second Actuators share the task of activating or passivating the braking effect and varying the force.
- an electrical, electromagnetic, piezoelectric, electromechanical, pneumatic or hydraulic second actuator is expediently used, which uses the times when the braking effect is passivated to change the force, while the first actuator is only responsible for the rapid activation and passivation of the braking effect
- the second actuator can be used particularly expediently in a so-called window-disk thread brake to adjust the contact pressure of the spring disk, which works together with the abutment bolt that has the window for passivating the braking effect Abutment bolt or the first actuator with passivated or activated braking effect are known.
- a abutment bolt with only one peripheral window or with several peripheral windows can be used, with a first actuator that either rotates back and forth or rotates in one direction of rotation
- the second actuator for adjusting the force when the braking effect is activated can also be used for controlled band brakes or disc brakes.
- the only requirement is a first actuator that can passivate and activate the braking effect set quickly enough
- the spring plate is expediently arranged on a rotatably supported holder, the rotational position of which, together with the force of the spring plate, determines the force
- the second actuator is a rotary drive for the holder.
- the second actuator is expediently designed such that it has the rotational position corresponding to a specific force automatically stop
- different rotational positions can be stored in the control device for the holder and can optionally be set via the second actuator. These different rotational positions represent the different forces or the variable braking effects.
- control device can contain a logical actuation inhibition device which prevents the second actuator from adjusting the force until the braking action is passivated by the first actuator.
- the second actuator can be adjustable back and forth between at least two positions, which represent predetermined values or a predetermined ratio between the values of the force. Changes to the predetermined values or the relationship between the predetermined values can nevertheless be made on the control side.
- the setting device for the force additionally has a manual actuation. Then the force can be changed by hand as with conventional window spring-disk thread brakes, but not during an entry process.
- the second actuator can namely have a slower response than the first actuator because there is sufficient time available for the change in force, which is usually only relatively minor in practice, with a passivated braking effect during an entry process.
- control device contains a microprocessor
- the force determining the braking effect can also be infinitely adjusted by means of the second actuator.
- FIG. 1 is a perspective view of a controlled thread brake in an operating position with the braking effect activated
- Fig. 2 shows a section to Fig. 1, in an operating phase with passivated braking effect and in the adjustment of the force determining the braking effect, and
- Fig. 3 is a diagram of the operating behavior of the thread brake of Fig. 1 and
- a controlled thread brake 1 has a U-shaped support frame 2, in one leg 3 of which an inlet opening 4 for a thread Y and thus in alignment with the other leg 6, a thread draw-off eye 7 are provided.
- the thread brake 1 is preferably arranged downstream of a thread delivery device F, which is only indicated by dashed lines, and upstream of a weaving machine W that uses the thread Y, preferably a rapier or projectile weaving machine.
- a web 9 of the support frame 2 rotatably supports a mandrel-like holder 10 near the leg 3, which can be rotated by means of an adjusting device E, in the exemplary embodiment shown by a second actuator M2, which is designed as a rotary drive and positioner for the holder 10 and either is fixed to the support frame 2 or in a holder 17.
- the adjusting device E is additionally equipped with a manual actuation, not shown, which makes it possible either to rotate the holder 10 relative to the second actuator M2, or to adjust the second actuator M2 with the holder 10 relative to the support frame 2.
- a spring plate 14 made of resilient material is fixed with screws 13.
- the end of the spring plate 14 could also be tied in the longitudinally slotted holder 10.
- One for thread take-off eye 7 The facing end area of the spring plate 14 is supported on an abutment bolt 15 which is rotatable in the support frame 2 and approximately parallel to the holder 10.
- the spring plate 14 represents a first brake element B, while the abutment pin 15 forms a second brake element B '.
- the spring plate 14 rests with a certain force on the circumference of the abutment pin 15. The force can be adjusted by means of the second actuator M2 and / or, if present, by means of manual actuation of the adjusting device E.
- the thread Y runs with a predetermined thread path between the spring plate 14 and the abutment pin 15.
- the end of the spring plate 14 facing the thread take-off eyelet 7 is expediently bent, so that the thread Y in the thread brake 1 is braked by clamping essentially only in the contact area between the spring plate 14 and the abutment pin 15.
- the abutment pin 15 is operatively connected to a first actuator M1, which is seated in the holder 17.
- the first actuator M1 is, for example, a permanent magnet motor which can be rotated gradually in one direction of rotation or rotated back and forth between two predetermined rotational positions. It is a quickly responding rotary drive for the abutment pin 15. In the embodiment shown, the range of rotation is e.g. between 90 and 180 °.
- the abutment pin 15 is provided with a cross-section-reducing window 19 on part of its circumference. Axially on both sides of the window 19, the abutment pin 15 forms annular collars 20, 21 with a cross section, which serve as support surfaces for the spring plate 14. 1 and 2, the window 19 is formed by a reduction in cross-section of the abutment bolt 15 with a convex bottom 22 and linear or rounded transitions 23 into the peripheral surface extending over approximately 90 ° in the circumferential length.
- the weaving machine W is equipped with a control unit CU, with which the thread entry is controlled.
- the control unit CU is connected, possibly via a further electronic control device C, to the first actuator M1, which forms a rotary drive for the abutment pin 15, and also to the second actuator M2, which has a remote-controlled adjustment device E for the holder 10 or forms the force with which the two brake elements B, B 'are pressed against each other resiliently.
- the force with which the spring plate 14 presses against the abutment pin 15 can be varied by means of the second actuator M2, and likewise via the expediently common control device C.
- actuation of the second actuator M2 is at least essentially exclusively then takes place when the first actuator M1 has rotated the abutment pin 15 into the rotational position of FIG. 2 and has passivated the braking action.
- the braking effect is activated and as high as is set by the second actuator M2.
- the force could also be changed by a transverse displacement of the holder 10 in the support frame 2, specifically by means of a second actuator M2, which then represents a displacement drive.
- the window spring disk brake shown in FIGS. 1 and 2 is only one non-limiting example of a controlled thread brake.
- the functional principle of changing the force with which two brake elements are pressed against one another during an insertion process is generally expedient for thread brake types in which the braking action can be quickly activated and passivated by means of a first actuator, so that the second actuator in operating phases with a passivated brake - Effect has enough time to change the force even during the same entry process.
- This means that the concept according to the invention can also be used for disc brakes, band brakes or also for multi-disc brakes, in which the first actuator quickly switches the braking effect on and off, while the second actuator changes the force which determines the particular braking effect.
- Fig. 1 it is indicated that the control device C for positioning or activating the braking effect on the first actuator M1 gives commands i- or i +, on the other hand, control commands (-) or (+) to the second actuator M1 if the Braking force determining force is to be changed.
- This is expediently carried out with reference to the angle of rotation of the weaving machine, which is only indicated schematically, as indicated by the angle sign at CU.
- FIG. 3 is to illustrate how a specific thread tension profile is achieved by means of the controlled thread brake 1 for a rapier weaving machine W, in which the thread Y is first transported by a rapier gripper to about the middle of the shed, then transferred to the slave rapier and by the latter completely pulled through the compartment and finally released.
- the three hatched fields in the diagram in FIG. 3 illustrate operating phases with activated braking effect, while the non-hatched fields in between show operating phases with passivated braking effect.
- the second actuator M2 sets a braking effect which corresponds to a thread tension f1.
- the first actuator M1 received the command i- and passivated the braking effect.
- the thread brake 1 is in the position of FIG. 2.
- the first actuator M1 receives the i + command, so that it activates the braking effect, which begins almost instantaneously as predetermined by the set value f1.
- This braking effect is used in the first hatched field until the control device C issues the i command to the first actuator M1 is given, and this passivates the braking effect practically suddenly.
- the second actuator M2 can receive the signal (+), so that at an angular position x1 it begins to increase the force from the value f1 to the value f2, which is reached at an angular position x2, at the latest at the angular position at which the first actuator M1 again receives the i + command for the second hatched field and reactivates the braking effect.
- the braking effect is then determined by the value f2, which is initially maintained until the first actuator M1 receives the i- command in a further angular position and the braking effect is suddenly passivated.
- the value f2 is then changed back to the value f1 (or another value) by means of the second actuator M2, so that the value f1 (or another value) is present at an angular position x4.
- the braking action starts with the value f1 to generate the third hatched field, before finally the braking action is again given to the first actuator M1 by the i- command is passivated.
- the thread brake 1 is then ready for the next entry process, for example to start with the value f1.
- FIG. 3 shows that compared to the speed with which the actuator M1 has to activate and passivate the braking effect, the actuator M2 has far more time available or can use a larger angular range than this to change the force. This makes it possible to achieve a relatively optimal tension profile in the thread Y without doing any special control-related effort for the second actuator M2.
- the second actuator M2 For most applications, it will be sufficient to set two different forces with the second actuator M2 or to switch back and forth between these two forces. However, it is also possible to use the second actuator M2 to continuously generate certain curve profiles which are superimposed on the curve profile generated by the first actuator. The setting of the respective force can be carried out by the control device C alone. However, it is also conceivable to use the manual actuation of the adjusting device to make certain basic settings. That means, by means of the second actuator M2, all necessary adjustments are made on the control side, or only switching operations are carried out, while basic settings e.g. done manually.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9900665A SE9900665D0 (sv) | 1999-02-23 | 1999-02-23 | Vorrichtung und Verfahren zum variierenden Bremseneines laufenden Fadens |
SE9900665 | 1999-02-23 | ||
PCT/EP2000/001492 WO2000050326A1 (de) | 1999-02-23 | 2000-02-23 | Vorrichtung und verfahren zum variierenden bremsen eines laufenden fadens |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1154946A1 true EP1154946A1 (de) | 2001-11-21 |
EP1154946B1 EP1154946B1 (de) | 2003-05-07 |
Family
ID=20414619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00907612A Expired - Lifetime EP1154946B1 (de) | 1999-02-23 | 2000-02-23 | Vorrichtung und verfahren zum variierenden bremsen eines laufenden fadens |
Country Status (7)
Country | Link |
---|---|
US (1) | US6505653B1 (de) |
EP (1) | EP1154946B1 (de) |
KR (1) | KR20010111493A (de) |
CN (1) | CN1159200C (de) |
DE (1) | DE50002070D1 (de) |
SE (1) | SE9900665D0 (de) |
WO (1) | WO2000050326A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7543610B2 (en) * | 2006-06-16 | 2009-06-09 | Sultex Ag | Thread clamp for a rapier head |
BE1016183A3 (nl) * | 2004-09-08 | 2006-04-04 | Picanol Nv | Werkwijze en inrichting voor het klemmen van een inslagdraad bij een weefmachine. |
EP1811068B1 (de) * | 2006-01-24 | 2009-06-17 | Sultex AG | Gesteuerte Fadenbremse |
BE1018327A3 (nl) * | 2008-10-31 | 2010-09-07 | Picanol Nv | Draadrem en werkwijze om de draadrem aan te wenden. |
US9908739B2 (en) * | 2012-04-24 | 2018-03-06 | Curt G. Joa, Inc. | Apparatus and method for applying parallel flared elastics to disposable products and disposable products containing parallel flared elastics |
ITUB20155266A1 (it) * | 2015-10-30 | 2016-01-30 | Roj S R L | Freno elettromagnetico pilotato per il controllo della tensione dei fili di trama in macchine tessili |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE59105505D1 (de) * | 1990-09-10 | 1995-06-22 | Rueti Ag Maschf | Fadenbremse für Webmaschinen. |
DE9113430U1 (de) * | 1991-07-22 | 1992-12-24 | Sobrevin Société de brevets industriels-Etablissement, Vaduz | Vorrichtung zur unterschiedlichen Bremsung laufender Fäden, Drähte o.dgl. |
CH686955A5 (de) * | 1992-03-16 | 1996-08-15 | Der Loepfe Ag Geb | Fadenbremseinrichtung. |
DE9215226U1 (de) * | 1992-11-09 | 1994-05-11 | Sobrevin Société de brevets industriels-Etablissement, Vaduz | Fadenbremse |
US5476122A (en) * | 1993-03-05 | 1995-12-19 | Lindauer Dornier Gesellschaft Mbh | Weft thread brake responsive to yarn characteristics in a loom |
IT1310749B1 (it) * | 1999-11-30 | 2002-02-22 | Lgl Electronics Spa | Metodo e dispositivo di controllo di freni di trama elettrocomandatiper la regolazione automatica della tensione meccanica del filo di |
-
1999
- 1999-02-23 SE SE9900665A patent/SE9900665D0/xx unknown
-
2000
- 2000-02-23 WO PCT/EP2000/001492 patent/WO2000050326A1/de active IP Right Grant
- 2000-02-23 US US09/914,100 patent/US6505653B1/en not_active Expired - Fee Related
- 2000-02-23 KR KR1020017010728A patent/KR20010111493A/ko active IP Right Grant
- 2000-02-23 CN CNB008053677A patent/CN1159200C/zh not_active Expired - Fee Related
- 2000-02-23 EP EP00907612A patent/EP1154946B1/de not_active Expired - Lifetime
- 2000-02-23 DE DE50002070T patent/DE50002070D1/de not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0050326A1 * |
Also Published As
Publication number | Publication date |
---|---|
SE9900665D0 (sv) | 1999-02-23 |
CN1159200C (zh) | 2004-07-28 |
WO2000050326A1 (de) | 2000-08-31 |
KR20010111493A (ko) | 2001-12-19 |
US6505653B1 (en) | 2003-01-14 |
CN1344219A (zh) | 2002-04-10 |
EP1154946B1 (de) | 2003-05-07 |
DE50002070D1 (de) | 2003-06-12 |
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