EP0495920B1 - Fadenbremse - Google Patents

Fadenbremse Download PDF

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Publication number
EP0495920B1
EP0495920B1 EP90917092A EP90917092A EP0495920B1 EP 0495920 B1 EP0495920 B1 EP 0495920B1 EP 90917092 A EP90917092 A EP 90917092A EP 90917092 A EP90917092 A EP 90917092A EP 0495920 B1 EP0495920 B1 EP 0495920B1
Authority
EP
European Patent Office
Prior art keywords
yarn
threading
air
brake according
thread
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.)
Expired - Lifetime
Application number
EP90917092A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0495920A1 (de
Inventor
Michele Mellilo
Kurt Jacobsson
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.)
Iro AB
Original Assignee
Iro AB
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
Priority claimed from SE8903414A external-priority patent/SE8903414D0/xx
Priority claimed from SE9001136A external-priority patent/SE9001136D0/xx
Application filed by Iro AB filed Critical Iro AB
Publication of EP0495920A1 publication Critical patent/EP0495920A1/de
Application granted granted Critical
Publication of EP0495920B1 publication Critical patent/EP0495920B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D03D47/34—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
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/003—Arrangements for threading or unthreading the guide
    • 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
    • B65H59/26—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
    • 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 invention relates to a thread brake specified in the preamble of claim 1.
  • a thread brake In a thread brake, the thread running through is mechanically braked by pinching and / or deflecting.
  • the thread brake is a weak point in the thread path when first threading and when threading after a thread break, because the thread may have to be manually threaded by several thread brakes, which is time-consuming and cumbersome.
  • the gain in operating convenience and downtime due to an automatic threading device provided for other components along the thread path is considerably reduced by the manual threading in the thread brakes.
  • a brake element is pressed against a counter-brake element designed as a tensioned brake band.
  • the braking element is connected to a cam drive and can even be completely Lift off the counter-braking element.
  • the invention has for its object to provide a thread brake that enables automatic threading of the thread.
  • the thread brake is adjusted to the threading position and an air flow is generated in the air duct which automatically threads the thread end through the thread brake.
  • the threading is carried out automatically in a short amount of time.
  • the air flow can either be generated in the thread brake or outside.
  • the air guiding surfaces prevent the air flow and the thread from deviating laterally and ensure that the free thread end flies through the thread brake quickly and without getting caught.
  • the drive modulate the braking effect in addition to setting the threading position. This may be done remotely or automatically.
  • the drive adjusts the braking element in both directions. This is expedient in view of a quick start of operation after threading, because the drive sets the thread brake again to a predetermined braking effect.
  • an automatic threading process is initiated when the drive is actuated. This can be done remotely. Manual operation is also conceivable.
  • the air guiding surfaces for the automatic threading by means of air flow can be attached with little structural effort.
  • the embodiment according to claim 10 is expedient, in which air guide surfaces are arranged on the holding arms, which come into the guiding position by the movement of the holding arms in the threading position. It is also conceivable to arrange the air guiding surfaces movably on the holding arms and to move them into the guiding position by means of drive devices when the threading position is set.
  • a further embodiment emerges from claim 11.
  • the air guiding surfaces on the surfaces of the slats guide the air flow that threads the thread.
  • the electromagnet directly influences the braking element via an air gap.
  • the contact pressure on the stationary riser can be sensitively modulated and the threading position can be adjusted.
  • the direct one The application of the metallic lamella by the magnet is structurally simple. In the threading position, the lamella actively contributes to guiding the thread when threading.
  • the attachment of the braking element and the magnet to the holder according to claim 15 can be roughly adjusted by pivoting the holder, the system pressure of the braking element. Regardless of the selected swivel position of the holder, the magnet remains in the predetermined spatial assignment to the braking element, so that its force on the disk is optimally effective. This is useful for threading, because the magnet does not need to be readjusted to the lamella afterwards.
  • the embodiment according to claim 16 is also important. As a rule, a threading air nozzle will suffice. However, several threading air nozzles can also be provided. It is also conceivable to structurally combine a pressure nozzle with a suction nozzle.
  • a thread brake F K (crocodile brake) suitable for automatically threading a thread Y has a base body G, on which two holding arms 3 can be pivoted about parallel axes 4 spaced apart from one another. Intermeshing gears 5 connect the two holding arms 3 to a common, opposite spreading movement. A drive A engages one of the gears 5. The two holding arms 3 are through Feathers not shown (arrows 10) spread apart. The spring preload is adjustable. On the holding arms 3 are in the passage direction of the thread Y offset from one another with holding brackets 11 brake elements B, namely thread eyelets 2, which are elongated compared to conventional ring-shaped thread eyelets.
  • a stationary thread eyelet 1 is provided on the inlet side in an inlet opening, which is preceded by a pressure nozzle 8 which can be connected to a pressure source P, 9.
  • the pressure nozzle 8 can be fixed in place of the thread eyelet 1 in the base body.
  • the pressure nozzle 8, like the pressure source P, can be separated from the thread brake. Only the air flow must be effective in the thread brake.
  • the drive A can be an electric motor, a pneumatic cylinder or a mechanical drive 6, which can adjust the holding arms 3 into a threading position (FIG. 2). If necessary, the drive 6 replaces or supports the springs.
  • a stationary thread eyelet 7 is attached to the output side.
  • a thread break detector D is provided behind it, which monitors the thread Y and generates a signal in the event of a thread break.
  • the drive A With the signal of the detector D, the drive A is switched on, which folds the holding arms 3 into the threading position (FIG. 2), in which the thread guide elements (pressure nozzle 8, thread eyelet 1, braking elements B, thread eyelet 7) are aligned with one another and define a continuous air duct .
  • the elongated thread eyelets 2 form air guide surfaces L, see above that an air flow (indicated by arrows in Fig. 2) goes straight through the air duct and entrains the thread end.
  • the intermediate distances Z between the braking elements B are expediently as small as possible.
  • the drive A is deactivated.
  • the holding arms 3 are spread again in order to deflect and brake the continuous thread Y in a zigzag shape.
  • the pressure nozzle 8 is separated from the pressure source P, or the pressure source P, 9 is switched off.
  • the thread break detector D does not necessarily have to be arranged on the thread brake itself. Any suitable control device in front of or behind the thread brake could perform this function. It is also conceivable to actuate the drive A either remotely and automatically or by hand to adjust the thread brake F K to the threading position and to supply the pressure nozzle 8 with compressed air.
  • the braking elements B in FIG. 1 can be trapezoidal thread eyelets 2 'in longitudinal section, which, with their longer inner bore parts, form the air guiding surfaces L and complement each other in the threading position according to FIG. 2 so that a continuous air duct is created.
  • the short inner bore parts of the thread eyelets 2 ' act as desirably short deflection areas for a predeterminable braking effect.
  • Modified thread eyelets 2, 2 'could also be in those that were already in operation Thread brakes F K are provided instead of the usual short, ring-shaped thread eyelets, so that the thread brake F K is suitable for automatic threading.
  • the holding brackets 11 of the holding arms 3 are expanded to wings 12 which form Lurtleit vom L and limit the air duct from the outside in the threading position.
  • Conventional, ring-shaped and short thread eyelets can be used as the braking elements B.
  • the wings 12 can be formed in one piece with the holding arms 3.
  • a continuous wall 14 of the base body is provided as the Lurtleit Structure L, which closely adjoins the holding arms 3 and the braking elements B.
  • a flap 15 can be pivoted back and forth about a pivot bearing 16 in the direction of a double arrow to illustrate a further alternative, which serves as an air guide surface L in the threading position.
  • a flap 19 in the base body G in the direction of a Double arrow 20 to be pivotally mounted about a bearing 18 and serve as an air guide surface L, which is pivoted to the holding arms 3 when moving into the threading position to limit the air duct.
  • the adjustment movement of the holding arms 3 into the threading position can also be used to derive the movements necessary for moving the flaps.
  • FIGS. 9 and 10 show a multi-disc brake F L suitable for automatic threading.
  • two brake elements B resilient disks 21
  • vertical bars 24 which can be rotated in opposite directions about the axes 4 by means of the toothed wheels 5 so that the disks 21 are pressed against one another with a prestress and define a brake gap.
  • the ends 22 of the slats 21 are flattened.
  • Drive A acts on the gearwheels 5, for example a mechanical drive coupled to a drive source. Not only can the pretension of the two slats 21 be changed, but slats 21 can also be brought into the threading position (indicated by dashed lines).
  • a stationary thread eyelet 1 is attached to the base body and a pressure nozzle 25 is placed in front of it.
  • a dashed line also indicates an air duct 26 which is elongated from the thread eyelet 1 to between the slats 21.
  • Air guiding surfaces L in the form of webs 27 are provided on the mutually facing surfaces of the slats 21, which extend over an initial longitudinal region of the slats and converge, for example, in the direction of passage of the thread Y (FIG. 10).
  • the webs 27 can be glued, soft elastic rubber lips that Do not affect the suspension properties of the slats 21.
  • the lamellae 21 are adjusted to the dotted threading position according to FIG. 9 before a belt flow blows the free thread end through the air guide channel 26 and between the air guide surfaces L of the lamellae 21.
  • Fig. 9 drives A for the slats 21 are indicated, which are formed by magnets 28 fixedly fixed on the base body G.
  • the magnets 28 are expediently proportional magnets whose magnetic force generated in the (metallic) lamellae 21 is proportional to the current applied.
  • the magnets 28 can have a dual function. On the one hand, with a selected setting (the gear wheels 5) and the contact pressure of the plates 21 without changing the gear wheels 5 by the magnets 28, the contact pressure and the braking effect can be changed. However, the two magnets 28 are also able to bring the slats 21 into the threading position shown in broken lines without adjusting the gear wheels 5.
  • FIG. 11 and 12 show another thread brake F ' L (multi-disc brake) which is suitable for automatic threading and which is distinguished from the previous embodiment by, inter alia, only one disc 36 as the active braking element B.
  • F ' L multi-disc brake
  • an air guide channel 31 is formed in the extension of the stationary thread eyelet 1, which extends as far as the lamella 36 and ends with an oval mouth 40 in the wall 33 running approximately parallel to the lamella.
  • the wall 33 belongs to a tubular part 30 of the base body G, which is continued on the side opposite the lamella 36 to the end of the base body G.
  • a stationary elevation 35 in the form of a transverse bolt is attached in a recess 34, the contour of which protrudes only slightly beyond the contour of the channel 31.
  • the bent end of the lamella 36 lies on the elevation 35 in the normal operating position (drawn in solid lines).
  • the lamella 36 can be raised into the threading position (indicated by dashed lines).
  • the underside of the lamella 36 forms an air guide surface L with its curved end region, which guides the air flow from the channel 31 to the end of the base body G with the air guide surface formed by the curved contour of the elevation 35.
  • the increase 35 is a passive counter braking element B G.
  • a threading air nozzle 32 opens at an angle in the air guide channel 31 in order to generate the air flow required for the automatic threading.
  • an arm-shaped holder 29 can be pivoted about an outer axis 38. With an actuating arm 39 the holder 29 can be pivoted about the axis 38.
  • the pivot bearing is expediently self-locking. Since the lamella 36 is fixedly attached to the arm 29 at 37, the rotational position of the holder 29 determines the contact pressure of the lamella 36 at the elevation 35.
  • the drive A is fastened to the holder 29 in the form of a magnet 28, with which both the contact pressure of the lamella 36 and thus the braking effect is modulated and the disk 36 can be moved into the threading position shown in dashed lines.
  • a predetermined intermediate gap is provided between the magnet 28 and the lamella 36, which gap is matched to the range of the magnetic force.
  • the lamella 36 and the magnet 28 are attached to the holder 29 in a fixed spatial association, so that the magnet 28 maintains approximately the same position relative to the lamella 36 regardless of the pivoting position of the holder 29 and its magnetic force is optimally effective.
  • the thread Y is braked. As soon as the magnet 28 is excited to a certain extent, the lamella 36 is acted upon against its pretension; the braking effect decreases. If a thread break has occurred, which is detected, for example, by a thread break detector and is reported as a signal, then the magnet 28 is further excited until the lamella 36 is pulled into its threading position.
  • the threading air nozzle 32 is pressurized with compressed air. A strong, directed air flow is created in the channel 31 and is guided from the thread guide surfaces L on the underside of the lamella 36 and on the top of the elevation 35 to the right end of the base body in FIG. 11.
  • the resulting suction in the thread eyelet 1 pulls the free thread end held there for automatic threading into the channel 31 and threads the thread through it Thread brake F ' L.
  • the magnet is de-energized again, to the extent that it corresponds to the desired braking effect, so that the lamella 36 rests against the elevation 35 again.
  • the pressurization of the threading air nozzle 32 is interrupted.
  • the holder 29 can also be adjusted accordingly about the axis 28, for which purpose a drive (not shown) is provided. If the thread breaks, this drive can also be used to bring the lamella 36 into the threading position by pivoting the holder 29.
  • the threading air nozzle 32 could also be arranged instead of or in front of the thread eyelet 1. It is also conceivable to provide a plurality of nozzle outlets along the channel 31.
  • the magnet 28 could also be arranged on the opposite side of the membrane 36 in the base body and act on the lamella 36 with compressive forces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Looms (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP90917092A 1989-10-16 1990-10-16 Fadenbremse Expired - Lifetime EP0495920B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE8903414A SE8903414D0 (sv) 1989-10-16 1989-10-16 Fadenbromse
SE8903414 1989-10-16
SE9001136A SE9001136D0 (sv) 1990-03-28 1990-03-28 Garnbroms
SE9001136 1990-03-28

Publications (2)

Publication Number Publication Date
EP0495920A1 EP0495920A1 (de) 1992-07-29
EP0495920B1 true EP0495920B1 (de) 1994-01-19

Family

ID=26660612

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90917092A Expired - Lifetime EP0495920B1 (de) 1989-10-16 1990-10-16 Fadenbremse

Country Status (6)

Country Link
US (1) US5368244A (ja)
EP (1) EP0495920B1 (ja)
JP (1) JP2932099B2 (ja)
KR (1) KR100191653B1 (ja)
DE (1) DE59004368D1 (ja)
WO (1) WO1991005728A1 (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT226136Y1 (it) * 1991-09-19 1997-04-18 Roy Electrotex Spa Miglioramenti costruttivi per porgitrama per telai di tessitura.
IT1251209B (it) * 1991-09-20 1995-05-04 Lgl Electronics Spa Dispositivo di frenatura autoregolante del filato per apparecchi alimentatori di trama.
DE4131652A1 (de) * 1991-09-23 1993-04-01 Iro Ab Webmaschine und eintragbremse fuer webmaschinen
CH686955A5 (de) * 1992-03-16 1996-08-15 Der Loepfe Ag Geb Fadenbremseinrichtung.
DE4319960A1 (de) * 1993-06-16 1994-12-22 Iro Ab Vorrichtung zum Führen und Bremsen eines Fadens
GB2283762B (en) * 1993-11-11 1997-03-26 Fabio Botturi Yarn feeding device for a loom
IT1284077B1 (it) * 1996-06-27 1998-05-08 Roj Electrotex Nuova Srl Dispositivo frena-filo per macchine tessili
IT1311453B1 (it) * 1999-11-19 2002-03-12 Lgl Electronics Spa Freno di trama compensatore perfezionato.
US8761856B2 (en) 2003-08-01 2014-06-24 Dexcom, Inc. System and methods for processing analyte sensor data
US7623990B2 (en) * 2004-11-03 2009-11-24 Draeger Medical Systems, Inc. System for reducing signal interference in modulated signal communication
CZ303614B6 (cs) * 2011-11-28 2013-01-09 Maschinenfabrik Rieter Ag Zpusob a zarízení k brzdení príze, zejména pri obnovování predení na pracovním míste tryskových doprádacích stroju

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Publication number Priority date Publication date Assignee Title
US2222847A (en) * 1939-06-06 1940-11-26 Sipp Eastwood Corp Yarn control means
US2397153A (en) * 1944-01-20 1946-03-26 North American Rayon Corp Adjustable yarn tension device
US2556291A (en) * 1946-09-27 1951-06-12 American Viscose Corp Apparatus for tensioning running strands
DE893321C (de) * 1949-08-03 1953-10-15 Reiners Walter Dr Ing Klauenbremse zum Spannen eines Fadens
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
US2646941A (en) * 1950-09-14 1953-07-28 American Viscose Corp Self-threading, self-cleaning tension device
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US2932151A (en) * 1958-03-04 1960-04-12 American Viscose Corp Yarn twister
US3191885A (en) * 1963-09-12 1965-06-29 Steel Heddle Mfg Co Tension device
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DE2543018C3 (de) * 1975-09-26 1978-07-27 Hamel Gmbh, Zwirnmaschinen, 4400 Muenster Fadenbremse, insbesondere für Doppeldrahtzwirnspindeln
US4274512A (en) * 1978-01-23 1981-06-23 Poly-Glas Systems Roving brake
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Title
WO-A-9011397 *

Also Published As

Publication number Publication date
WO1991005728A1 (de) 1991-05-02
US5368244A (en) 1994-11-29
KR920703431A (ko) 1992-12-17
KR100191653B1 (ko) 1999-06-15
JPH05502002A (ja) 1993-04-15
JP2932099B2 (ja) 1999-08-09
DE59004368D1 (de) 1994-03-03
EP0495920A1 (de) 1992-07-29

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