EP0326784B1 - Verfahren zur Abbremsung eines laufenden fadenartigen Gebildes und Fadenbremse zur Durchführung des Verfahrens - Google Patents

Verfahren zur Abbremsung eines laufenden fadenartigen Gebildes und Fadenbremse zur Durchführung des Verfahrens Download PDF

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Publication number
EP0326784B1
EP0326784B1 EP88810825A EP88810825A EP0326784B1 EP 0326784 B1 EP0326784 B1 EP 0326784B1 EP 88810825 A EP88810825 A EP 88810825A EP 88810825 A EP88810825 A EP 88810825A EP 0326784 B1 EP0326784 B1 EP 0326784B1
Authority
EP
European Patent Office
Prior art keywords
thread
braking
brake
brake according
rocker
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.)
Revoked
Application number
EP88810825A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0326784A1 (de
Inventor
Erich Weidmann
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.)
Loepfe AG Gebrueder
Original Assignee
Loepfe AG Gebrueder
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4180298&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0326784(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Loepfe AG Gebrueder filed Critical Loepfe AG Gebrueder
Publication of EP0326784A1 publication Critical patent/EP0326784A1/de
Application granted granted Critical
Publication of EP0326784B1 publication Critical patent/EP0326784B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • 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
    • B65H59/32—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged away from each other
    • 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
    • B65H59/32—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged away from each other
    • B65H59/34—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 running thread or the thread-like structure is braked by a clamp and between a fixed and a movable brake shoe by one of a thread brake control device actuated electromagnet actuated, ie pressed against the fixed brake shoe so that the thread is clamped between the two.
  • a thread brake control device actuated electromagnet actuated ie pressed against the fixed brake shoe so that the thread is clamped between the two.
  • a somewhat flexible steel band has also been proposed as a fixed brake shoe.
  • a spring is used as a retraction element when the electromagnet is de-energized, which returns the movable brake shoe to its rest or starting position.
  • Such a thread brake based on the clamping principle, and in such an embodiment has significant disadvantages which, particularly in the case of threads made of polypropylene or jute, quickly rendered it unsuitable for operation.
  • threads made of polypropylene or jute For example, in the case of polypropylene thread material, the steel strips used as fixed brake shoes were destroyed within a few working layers.
  • built up after relatively few hours of operation due to the abrasion of fiber components and the fiber finishing materials on the side of the thread track ramparts on which the brake shoes were supported without effectively braking the thread. This leads to loose weft threads and thus to fabric defects.
  • the damage is particularly large due to the fact that a wrong or not inserted thread destroys the manufacture of the product, a certain larger number of meters, e.g.
  • the thread is guided along braking elements, its normal thread path not being influenced by these when the brake is released.
  • brake elements which belong to two brake element groups and which are arranged alternately along the thread axis, are moved against the thread and the thread is deflected by this into a meandering path, as a result of which the friction on the brake elements causes the thread to brake or to brake completely and to a standstill comes without being pinched.
  • the thread brake has a brake carrier 1 (or a housing), on which a slide-like positioning device 2 is displaceably guided and seated by means of a positioning screw 14.
  • the positioning device 2 carries on the one hand, the brake body, which is designed as a deflectably mounted organ, which is designed as a rocker 3, and, on the other hand, an adjusting device 4 for a force element 5.
  • This is designed as a displaceable bridge 6, which carries a part of force element magnets 7 assigned in pairs, the other part of the Force element magnets 7 is arranged in the rocker and both parts repel each other by their opposite polarity, that is to say they are effectively supported on one another.
  • the bridge 6 can be adjusted with respect to the rocker 3 with a bridge adjustment screw 9 seated in the adjusting device 4 for the force element.
  • This carries braking elements, which are loop-like thread guide elements 10.
  • braking elements which are loop-like thread guide elements 10.
  • two rocker stops 11 designed as cylindrical pins are suitable for the rocker 3, which cooperate with a rocker pin 12, and on the other hand, a brake block stop 13 is provided, both the rocker stops 11 and the brake block stop 13 being suitable for both organs Limit the range of movement in relation to the thread F in its normal position.
  • a fixedly arranged thread guide member 15, which is also designed like a loop, is also provided on the front ends of the positioning device 2 perpendicular to the thread axis for better thread guidance.
  • a brake block which has the shape of a pivotable bracket 16, is also articulated on the brake carrier 1.
  • a permanent magnet 17 and an iron plate 18 which improves the magnetic force effect are mounted on this bracket 16.
  • a first electromagnet 21 is fastened to the brake carrier 1 and, depending on the current supply from the thread brake control device 24 and corresponding polarization, interacts with the permanent magnet 17 to repel or attract it.
  • the thread brake control device 24 is located on a projectile sensor 26 and an open trigger 27 of the machine, which deliver machine signals that are required to generate the signals for the honeycomb brake.
  • the thread brake control device 24 switches off the current for the first electromagnet 21, as a result of which the thread is held to a suitable extent as a result of the force of the permanent magnet 17.
  • the thread brake control device 24 applies a reversely polarized current pulse of a suitable size to the first electromagnet 21, as a result of which the latter repels the permanent magnet 17 and thus releases the thread brake becomes.
  • a thread sensor for a thread monitor or thread run monitor can either be installed or installed in one of the thread guide members 10 or 15 or 20, the last variant being the cheapest solution and shown in FIG. 2.
  • This thread sensor 23 is connected to a thread monitor device 25 which is controlled by the thread brake control device 26. This in turn is connected to the machine sensors Open Trigger 27 and Projectile Sensor 26.
  • This variant has the significant advantage that the normally very high background noise level due to the high speeds of the textile machines and, accordingly, the high number of strokes of the brake actuation is reduced on the one hand by the new mode of operation of the thread brake, which does not cause sudden jamming, and on the other hand to the absolutely necessary monitoring phases in its Limited influence is maintained, but the procedurally ideal monitoring point for the thread running, namely in the immediate vicinity of the thread brake, is retained.
  • error messages from the stationary thread which are generally triggered by the basic disturbance level and which have previously been a frequent disturbance, are thus avoided, since a thread sensor signal that may occur is not passed on to the thread monitor device when the thread is stationary. So no interference signal can cause.
  • the variant with the permanent magnet there is also the possibility of holding the thread lightly and additionally reducing the interference signal of the stationary thread.
  • this arrangement according to the invention is very particularly advantageous in multi-color machines.
  • the thread sensors of all threads are connected to an evaluation device and together form the signal. This is possible because only one of the threads is running and can be identified differently. If, for example in the case of four threads, three resting threads give a resting basic disturbance signal to the evaluation device, then this is three times as large as a basic disturbance signal of an individual thread, with which the distance from the basic disturbance level to the signal level of the fourth, running thread can become so small that an evaluation of the run signal is no longer possible or is only possible with very significantly increased technical effort. Such a situation occurs especially when the three resting threads are thick threads and the running thread is a thin thread. The thin thread is then no longer effectively monitored.
  • the thread can be braked to a pre-set strength at predefined intervals of the working cycle of the machine without being completely braked and in other predefined intervals the working cycle of the machine can be completely braked.
  • Such interval-conform braking is particularly advantageous in rapier weaving machines for the interval of thread transfer from one rapier to another and the entry end interval. This allows the thread run freely and unchecked between these intervals. This is particularly desirable or almost necessary with many thread materials. With this proposed device, interval-compliant braking is possible even at today's extremely high thread speeds due to the much higher machine speeds. This despite an increase in the life of the thread brake closing elements.
  • a second electromagnet 22 can be provided, which is mounted on the bracket 16. The effect is correspondingly the same, only that the thread is not automatically held when the thread brake is de-energized. The thread brake is therefore not self-braking.
  • the force element 5 can be a spring which interacts with the adjustable bridge 6 and the rocker 3, which then both have no force element magnets 7.
  • the eyelet-like thread guide elements 10 of the brake body can have thread insertion openings (not shown), so that the thread F cannot be drawn in with tools in the direction of the thread axis, but can be inserted transversely to it without tools.

Landscapes

  • Tension Adjustment In Filamentary Materials (AREA)
  • Looms (AREA)
  • Sewing Machines And Sewing (AREA)
EP88810825A 1988-01-15 1988-12-01 Verfahren zur Abbremsung eines laufenden fadenartigen Gebildes und Fadenbremse zur Durchführung des Verfahrens Revoked EP0326784B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH146/88A CH676234A5 (enrdf_load_stackoverflow) 1988-01-15 1988-01-15
CH146/88 1988-01-15

Publications (2)

Publication Number Publication Date
EP0326784A1 EP0326784A1 (de) 1989-08-09
EP0326784B1 true EP0326784B1 (de) 1993-06-16

Family

ID=4180298

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88810825A Revoked EP0326784B1 (de) 1988-01-15 1988-12-01 Verfahren zur Abbremsung eines laufenden fadenartigen Gebildes und Fadenbremse zur Durchführung des Verfahrens

Country Status (5)

Country Link
US (1) US4927093A (enrdf_load_stackoverflow)
EP (1) EP0326784B1 (enrdf_load_stackoverflow)
JP (1) JPH01314754A (enrdf_load_stackoverflow)
CH (1) CH676234A5 (enrdf_load_stackoverflow)
DE (1) DE3838162A1 (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH686955A5 (de) * 1992-03-16 1996-08-15 Der Loepfe Ag Geb Fadenbremseinrichtung.
IT1284077B1 (it) * 1996-06-27 1998-05-08 Roj Electrotex Nuova Srl Dispositivo frena-filo per macchine tessili
ITTO980207A1 (it) * 1998-03-12 1999-09-12 Lgl Electronics Spa Dispositivo di frenatura modulata del filato di trama per macchine tessili
IT1303154B1 (it) * 1998-07-17 2000-10-30 Lgl Electronics Spa Dispositivo perfezionato di frenatura modulata del filato di trama permacchine tessili.
DE10009611A1 (de) * 2000-02-29 2001-08-30 Schlafhorst & Co W Vorrichtung zur Steuerung der Fadenzugkraft eines laufenden Fadens in einer automatischen Wickeleinrichtung
CN109632816B (zh) * 2018-12-26 2021-03-05 石狮市宝翔针织机械有限公司 一种针织机器人用纱疵传感器

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732142A (en) * 1956-01-24 Grein
FR545845A (fr) * 1922-01-13 1922-10-21 Tendeur de fils pour machines à bobiner et d'autres machines de l'industrie textile
US2005975A (en) * 1933-07-24 1935-06-25 Warp Compressing Machine Compa Thread tensioning device
US2202323A (en) * 1938-10-14 1940-05-28 Woodruff T Sullivan Weft tension and loom stopping device
DE893321C (de) * 1949-08-03 1953-10-15 Reiners Walter Dr Ing Klauenbremse zum Spannen eines Fadens
US2615656A (en) * 1949-09-10 1952-10-28 Strake Lambertus Te Yarn brake
US2618445A (en) * 1949-11-09 1952-11-18 Josef Sailer Maschinenfabrik Yarn brake
US2738141A (en) * 1949-12-10 1956-03-13 Deering Milliken Res Corp Compensating device
NL83939C (enrdf_load_stackoverflow) * 1954-06-11 1956-08-15
US2964259A (en) * 1957-04-29 1960-12-13 Singer Fidelity Inc Yarn tension device
US3087689A (en) * 1959-06-10 1963-04-30 Heim Richard Thread tensioning means for textile machines
US3300161A (en) * 1963-09-21 1967-01-24 Frau Sigrid Heim Control device
CH435152A (de) * 1965-06-21 1967-04-30 Steel Heddle Mfg Co Vorrichtung zum Spannen von Garn, insbesondere für Spulvorrichtungen an Webstühlen
DE1535144A1 (de) * 1965-09-11 1970-04-09 Elitex Zd Y Textilniho Strojir Fadenbremse fuer Textilmaschinen,besonders Spulmaschinen
NL145819B (nl) * 1967-09-12 1975-05-15 Strake Maschf Nv Garenrem voor getwijnde garens.
NL6712482A (enrdf_load_stackoverflow) * 1967-09-12 1969-03-14
DE1912504A1 (de) * 1969-03-12 1970-10-01 Dornier Gmbh Lindauer Fadenbremse fuer Textilmaschinen
DE2333161A1 (de) * 1973-06-29 1975-01-16 Heinz Hefert Kompensations - magnet - fadenbremse
CH584650A5 (enrdf_load_stackoverflow) * 1974-09-06 1977-02-15 Peyer Siegfried
FR2300734A1 (fr) * 1975-02-13 1976-09-10 Gabet Denimal Dispositif de frein
DE7803381U1 (de) * 1978-02-06 1978-11-02 Gebrueder Schmeing, 4280 Borken Vorrichtung zum spannen von garn
CH648614A5 (de) * 1980-12-13 1985-03-29 Loepfe Ag Geb Elektronische steuereinrichtung an einer greiferschuetzenwebmaschine.
DE3102117A1 (de) * 1981-01-23 1982-08-26 W. Schlafhorst & Co, 4050 Mönchengladbach Fadenspanneraggregat
FR2568595B1 (fr) * 1984-08-02 1986-09-05 Alsacienne Constr Mat Tex Dispositif de commande positive pour frein de fil.
US4880175A (en) * 1987-04-14 1989-11-14 Murata Kikai Kabushiki Kaisha Tension setting and controlling method and apparatus in an automatic winder

Also Published As

Publication number Publication date
CH676234A5 (enrdf_load_stackoverflow) 1990-12-28
US4927093A (en) 1990-05-22
EP0326784A1 (de) 1989-08-09
DE3838162C2 (enrdf_load_stackoverflow) 1993-08-12
JPH01314754A (ja) 1989-12-19
DE3838162A1 (de) 1989-08-03

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