EP0597239A1 - Frein de fil - Google Patents

Frein de fil Download PDF

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Publication number
EP0597239A1
EP0597239A1 EP93115994A EP93115994A EP0597239A1 EP 0597239 A1 EP0597239 A1 EP 0597239A1 EP 93115994 A EP93115994 A EP 93115994A EP 93115994 A EP93115994 A EP 93115994A EP 0597239 A1 EP0597239 A1 EP 0597239A1
Authority
EP
European Patent Office
Prior art keywords
thread
section
braking
reduced
wires
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
Application number
EP93115994A
Other languages
German (de)
English (en)
Other versions
EP0597239B1 (fr
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.)
Sobrevin Societe de Brevets Industriels
Original Assignee
Sobrevin Societe de Brevets Industriels
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
Application filed by Sobrevin Societe de Brevets Industriels filed Critical Sobrevin Societe de Brevets Industriels
Publication of EP0597239A1 publication Critical patent/EP0597239A1/fr
Application granted granted Critical
Publication of EP0597239B1 publication Critical patent/EP0597239B1/fr
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
    • 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
    • B65H2555/00—Actuating means
    • B65H2555/20—Actuating means angular
    • B65H2555/23—Actuating means angular magnetic, e.g. rotary solenoids
    • 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
    • B65H2555/20—Actuating means angular
    • B65H2555/24—Servomotors
    • 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 for variable braking of running threads, wires or the like, in particular for use in weft insertion on weaving machines. And a method for operating such a thread brake.
  • a thread brake is known from French patent application 23 75 366.
  • the thread is passed between two brake parts that can be brought together in a resilient manner.
  • One of the two brake parts is fixed and not resilient and the other brake part is cushioned and movable relative to the fixed brake part, so that the thread braking can be varied in its strength by a change in the spring tension achieved as a result of the movement.
  • the resilient brake part can also be spaced apart from the fixed brake part via a push rod via a push rod, so that an unbraked thread run can be achieved.
  • the problem with such a thread brake is that the spring force has to be relatively strong in order to brake the thread effectively.
  • the resilient braking part must be completely lifted off the fixed braking part.
  • the spring of the resilient brake part must be at least partially relaxed. This results in relatively high displacement paths of the push rod driving the resilient element. There are also limits to such an arrangement with regard to the cycle times between braking and releasing the thread, since the relaxation of the spring can no longer follow high cycle frequencies.
  • a thread brake is also known from European patent application 0 384 502, in which a rotationally movable, non-resilient brake part acts on a prestressed resilient tab. With this arrangement, however, no cyclical changing of the thread braking is provided.
  • the rotating cylinder body, which forms the non-resilient brake part, merely serves to remove dust particles lying on the thread by means of friction.
  • the model for the invention was also the device for the different braking of running threads, which was not proposed in the prior art utility model 91 13 430 and was not part of the prior art.
  • the device shown there already shows a fixed leaf spring which is acted upon by a cylindrical brake part.
  • This brake part is driven by an electric motor and has a cylindrical first section, the circumferential surface of which holds the spring in a pretension in the release position of the thread run.
  • a second section of the body has a peripheral section that is reduced in cross section. The thread runs between this second section and the leaf spring. If the cylindrical body is aligned with the window towards the leaf spring, the thread is unbraked.
  • the object of the invention is to improve the performance of such a thread brake.
  • the invention proposes the device specified in claim 1 and the method specified in claim 7.
  • the subclaims represent advantageous developments of the invention.
  • the resilient braking part need no longer be moved during operation to vary the braking.
  • the spring element Due to the essentially cylindrical first section of circular cross-section, the spring element is constantly held in a prestress, which can be varied by adjusting means.
  • the second section which can also be brought into contact with the spring element, has in the circumferential direction at least one reduced cross-sectional circumferential section, which is reduced in cross-section to the extent that a window remains between the circumferential section and the spring element when it is opposite the spring element, through which the thread can be pulled off without braking.
  • a non-cross-sectionally reduced circumferential section then faces the spring element, so that the thread is clamped between the spring element and the essentially cylindrical body forming the counter bearing, which results in braking. It can be provided that the leaf spring is displaced by the thickness of the thread. If the first section of the substantially cylindrical counter-bearing is exactly circular and if the circumferential section of the second section, which is not reduced in cross section, merges into this first section, the spring element is deflected by a thread thickness when the device enters the braking position. According to the training tion of the thrust bearing drive part as an electric stepper motor, a gradual further rotation of the shaft of the electric motor is possible without the need for mechanical stops.
  • the stepper motor Starting from a thread release position in which the reduced cross-sectional circumferential section is opposite the spring element, the stepper motor then only needs to be rotated by a corresponding number of steps, which is done by a corresponding number of switching impulses, until the reduced cross-sectional reduced circumferential area is opposite the spring element and the thread brake position is reached.
  • a preferably curved leaf spring can serve as a spring element and at the same time as a thread guide.
  • Another preferred embodiment is one in which a plurality of circumferentially reduced circumferential surfaces are provided in the circumferential direction. Circumferential areas not reduced in cross section are provided between these reduced-area circumferential surfaces.
  • a thread-free position occurs when a circumferentially reduced circumferential surface is placed opposite the spring element, while when a circumferential region that is not reduced in cross-section is placed opposite, the thread is clamped between the counter-bearing and the spring element.
  • the embodiment of the invention in which the number of steps of the step motor corresponds to at least twice the number of circumferential sections with reduced cross-sections is considered to be particularly advantageous. As a result of this configuration, the stepper motor only needs to be switched by a single step in order to transition from a braking position to a release position.
  • the number of steps of the motor is four. That means with every step the shaft of the stepper motor is rotated by 90. In total, four steps are necessary to make one revolution of the shaft of the stepper motor.
  • the invention proposes in a further development that these circumferential sections are designed as flattenings arranged transversely to the radial. In this case, the transitions to the circumferential sections that are adjacent in the circumferential direction and are not reduced in cross-section could be rounded in order to protect the thread.
  • the stepper motor preferably has a magnetically polarized armature.
  • this armature can be formed from a permanent magnet. The orientation of the magnet is oriented radially to the axis.
  • this preferred stepper motor has an excitation coil running in the circumferential direction, which is divided into a number of partial windings which corresponds to the number of steps of the electric motor.
  • the annular coil core of the excitation coil Associated with the individual step positions of the electric motor, the annular coil core of the excitation coil has opposite pole pairs. The armature of the electric motor is oriented between these pole pairs in accordance with the polarization of the excitation coil.
  • the excitation coil consists of an annular coil core with a total of four poles, each offset by 90, between which poles a partial winding is provided, and if the armature is to be held between two of these poles by magnetic forces, then the poles between them will be opposite arranged partial windings polarized in the same direction, so that a magnetization parallel to the armature magnetic field is built up. If the armature is now to be rotated by one step, in this case by 90, the second pole pair lying transverse to the first pole pair is magnetized accordingly. Now the partial windings lying between these two poles are traversed by current in the same direction, so that a magnetic field aligned between these two magnetic poles is created.
  • the method for operating a thread brake in accordance with a device includes that with each step of the stepping motor, the thread brake alternates from a braking position into a release position, starting from a braking position corresponding to a step position of the electric motor, in which a non-reduced circumferential area is opposite to the spring element, in the subsequent step of the electric motor a cross-section-reduced area is brought opposite to the spring element.
  • the direction of rotation of the electric motor need not change after the transition from the braking position to the release position.
  • the electric motor can always be operated with the same direction of rotation. This enables the armature to be magnetically bonded in any step position.
  • the body forming the counter bearing is rotated clockwise, step by step.
  • the device shown in FIGS. 1 to 5 has an engine block 24 which is formed on the outside with cooling fins 23.
  • the engine block is made of aluminum.
  • a motor shaft (not shown in FIGS. 1 to 5) emerges on one side of the engine block and carries an essentially cylindrical body 2.
  • the cylindrically shaped body 2 forms the counter bearing to a resilient tab 1, which clamps the thread F in the braking position (FIG. 2) between itself and the counter bearing 2.
  • the tab 1 is carried by a substantially U-shaped carrier plate 13 which is screwed onto the motor housing 24 with its bottom surface. The bottom surface of the carrier 13 is penetrated by the shaft of the motor.
  • Thread take-off opening 12 thread brake and thread inlet opening 21 lie almost on a straight line.
  • the above-mentioned pre-brake consists of two brackets 19, 20 which are spring-loaded against one another and which are each screwed onto square axes 18, 14.
  • the two tabs are screwed onto opposite surfaces of the square 14.
  • All three spring elements 1, 19, 20 have essentially the same rigidity and the same width, which cover the sections 4, 5, 8 of the body 2.
  • the section 8 is located between the sections 4, 5 of the body 2 which have a circular cross section.
  • the section 8 has two opposite circumferential sections 6, 7 with reduced cross sections in the circumferential direction. These circumferential sections are formed by flats which are arranged essentially transversely to the radial and which, in the transition region to the sections 10, 11 of the body 2 which are not reduced in cross section, have roundings 6 ', not shown in the drawings.
  • the cross-section-reducing circumferential sections 6, 7 form windows through which the thread can be drawn off without friction in the release position (cf. FIGS. 4 and 5).
  • the pre-brake consisting of the leaf springs 20 and 19 can be deactivated by appropriately adjusting the setting wheel 22 and pivoting the spring tabs 19, 10, namely by spacing the resilient tab 20 from the resilient tab 19.
  • the first section of the substantially cylindrical body forming the counterbearing consists of two circular sections 4, 5.
  • These circular sections 4, 5 have the effect that, even in a position according to FIGS. 4 and 5, the leaf spring 1 is in a prestressed manner Location remains.
  • the sections 4 and 5 run horizontally to the axis of rotation of the body 2.
  • a minimal change in the position of the spring 1 takes place in the braking position (see FIGS. 2 and 3), namely when the thread between one of the circumferential sections 10 or 11 not reduced in cross section and the Tab 1 is pinched.
  • the tab can be deflected by the thickness of the thread F.
  • lifting of the tab 1 from the two sections 4 and 5 which are circular in cross section can also be observed.
  • the operation of the device is as follows: The thread runs from the inlet eyelet 21 through the brake and is drawn off by the draw-off eyelet 12 and fed to a loom or the like, not shown.
  • the resilient tab 1 is acted upon by the circumferential section 11 of the second sub-section 8, which does not have a reduced cross-section, with the thread F being clamped.
  • the thread is braked in this position. In this position, the thread is not drawn off, but is held at a certain thread tension only on the part of the thread insertion eyelet 21. Will the thread against it withdrawn from the thread take-off eyelet 12, the body 2 is shifted by 90 ° , whereby the release position of the thread shown in FIGS.
  • a braking and a releasing position of the thread is then assumed alternately.
  • the direction of rotation can be set parallel to the thread path or against the thread path.
  • This switched switching of the body 2 is effected by a stepper motor which is arranged in the motor housing 23 and is designated by the reference number 9.
  • This stepper motor has a step number of four. This means that the shaft is rotated 90 ° with each step. Each step of the stepper motor thus corresponds to a transition from a braking position to a release position or vice versa.
  • the structure of the stepping motor 9 is shown schematically in FIG. 6.
  • the armature 44 which is designed as a permanent magnet oriented transversely to the axis of rotation, sits on the shaft 43, which is rotatably mounted in the motor housing.
  • the armature is surrounded by an annular core 30 of an excitation coil.
  • the excitation coil consists of a total of four partial areas each comprising an angle of 90. Each sub-area has a sub-coil 31, 32, 33, 34 and an inwardly projecting pole 39, 40, 41, 42.
  • the partial coils 31, 32, 33, 34 are arranged between the four poles 39, 40, 41, 42, each offset by 90.
  • the ends of adjacent coils - for example those of the coils 31 and 32 - are connected to one another, the respective ends 31 "being connected to the ends 32 '.
  • the connecting position of the coils 31, 32, 33, 34 form electrical connection contacts 35, 36, 37, 38 out.
  • the electrical connections 36 and 38 must accordingly be supplied with voltage current, so that a magnetic field builds up between the poles 40 and 42. If a corresponding magnetic field is then built up between the opposing poles 40 and 42, the armature 44 endeavors to orient itself in this magnetic field in accordance with its magnetization. As a result, the armature 44 makes a 90 clockwise rotation. The north pole and south pole of the armature are thereby shifted out of the orientation to the likewise opposite poles 39 and 41.
  • the armature is bound in the magnetic field built up by the excitation coil, the armature is prevented from rotating due to its angular momentum. As soon as the armature rotates beyond the equilibrium position parallel to the excitation magnetic field, the angle of the two magnetic fields causes the armature to return to its equilibrium position. This restoring force quasi forms an electromagnetic stop.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Braking Arrangements (AREA)
  • Control Of Stepping Motors (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP93115994A 1992-11-09 1993-10-04 Frein de fil Expired - Lifetime EP0597239B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9215226U 1992-11-09
DE9215226U DE9215226U1 (de) 1992-11-09 1992-11-09 Fadenbremse

Publications (2)

Publication Number Publication Date
EP0597239A1 true EP0597239A1 (fr) 1994-05-18
EP0597239B1 EP0597239B1 (fr) 1996-05-29

Family

ID=6885817

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93115994A Expired - Lifetime EP0597239B1 (fr) 1992-11-09 1993-10-04 Frein de fil

Country Status (6)

Country Link
US (1) US5492286A (fr)
EP (1) EP0597239B1 (fr)
JP (1) JP3439244B2 (fr)
AT (1) ATE138698T1 (fr)
DE (2) DE9215226U1 (fr)
ES (1) ES2053418T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000050326A1 (fr) * 1999-02-23 2000-08-31 Iro Patent Ag Procede et dispositif de freinage modulable d'un fil en deroulement
WO2000064795A1 (fr) * 1999-04-27 2000-11-02 Iropa Ag Actionneur et tendeur de fil a frein pourvu d'un actionneur
BE1012559A3 (nl) * 1999-03-17 2000-12-05 Wiele Michel Van De Nv Inslagdraadrem voor een weefmachine.
DE10013625A1 (de) * 2000-03-18 2001-09-27 Dornier Gmbh Lindauer Fadenbremse, insbesondere Schussfadenbremse für Webmaschinen

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1011089A3 (nl) * 1997-04-07 1999-04-06 Picanol Nv Draadrem met twee remelementen.
EP1095893B9 (fr) * 1999-10-26 2005-05-11 L.G.L. Electronics S.p.A. Frein de fil de trame, plus particulièrement pour métiers à tisser
US7543610B2 (en) * 2006-06-16 2009-06-09 Sultex Ag Thread clamp for a rapier head
US6755366B2 (en) * 2002-09-30 2004-06-29 Solutia Inc. Device for direct insertion of yarn in automatic winder
US20040195425A1 (en) * 2003-03-05 2004-10-07 Johannes Jensen Yarn tensioning device and arrays thereof
JP4003710B2 (ja) * 2003-07-23 2007-11-07 株式会社豊田自動織機 ジェットルームにおける緯入れ制御装置
DE502006003985D1 (de) * 2006-01-24 2009-07-30 Sultex Ag Gesteuerte Fadenbremse
WO2009025803A1 (fr) 2007-08-20 2009-02-26 Kevin Kremeyer Systèmes de dépôt d'énergie, équipement et procédés permettant de modifier et de commander des ondes de choc et un écoulement supersonique
JP2012062186A (ja) * 2010-09-17 2012-03-29 Fuji Xerox Co Ltd 原稿搬送装置及び画像形成装置
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
US10669653B2 (en) * 2015-06-18 2020-06-02 Kevin Kremeyer Directed energy deposition to facilitate high speed applications
CN110817596A (zh) * 2019-12-04 2020-02-21 芜湖航天特种电缆厂股份有限公司 电缆收卷前预热处理装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2375366A1 (fr) * 1976-12-27 1978-07-21 Nissan Motor Dispositif de prise de fil de trame pour un metier a tisser a jet de fluide
EP0384502A1 (fr) * 1989-02-16 1990-08-29 Picanol N.V. Dispositif pour freiner un fil de trame dans un métier à tisser
EP0453012A1 (fr) * 1990-04-17 1991-10-23 Picanol N.V. Frein de fil
DE9113430U1 (de) * 1991-07-22 1992-12-24 Sobrevin Société de brevets industriels-Etablissement, Vaduz Vorrichtung zur unterschiedlichen Bremsung laufender Fäden, Drähte o.dgl.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2952393A (en) * 1957-05-06 1960-09-13 Charles G Newton Yarn tension compensator
DE2131302A1 (de) * 1971-06-24 1972-12-28 Dornier Gmbh Lindauer Fadenbremse fuer Textilmaschinen
US4249580A (en) * 1979-09-20 1981-02-10 Rockwell International Corporation Weft control device
DE3446567C1 (de) * 1984-12-20 1986-05-07 Lindauer Dornier Gmbh, 8990 Lindau Schussfadenbremse mit stufenweise steuerbarer Bremswirkung
US4969489A (en) * 1988-07-14 1990-11-13 Nissan Motor Co., Ltd. Weft threading system for fluid jet loom using the storage drum winding arm
US5002089A (en) * 1990-04-02 1991-03-26 Carrier Corporation Variable area refrigerant expansion device for heating mode of a heat pump
DE59105505D1 (de) * 1990-09-10 1995-06-22 Rueti Ag Maschf Fadenbremse für Webmaschinen.
BE1005173A3 (nl) * 1991-08-13 1993-05-11 Picanol Nv Draadrem.
CH686955A5 (de) * 1992-03-16 1996-08-15 Der Loepfe Ag Geb Fadenbremseinrichtung.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2375366A1 (fr) * 1976-12-27 1978-07-21 Nissan Motor Dispositif de prise de fil de trame pour un metier a tisser a jet de fluide
EP0384502A1 (fr) * 1989-02-16 1990-08-29 Picanol N.V. Dispositif pour freiner un fil de trame dans un métier à tisser
EP0453012A1 (fr) * 1990-04-17 1991-10-23 Picanol N.V. Frein de fil
DE9113430U1 (de) * 1991-07-22 1992-12-24 Sobrevin Société de brevets industriels-Etablissement, Vaduz Vorrichtung zur unterschiedlichen Bremsung laufender Fäden, Drähte o.dgl.
EP0524429A1 (fr) * 1991-07-22 1993-01-27 SOBREVIN Société de brevets industriels-Etablissement Dispositif pour freiner distingtivement des fils ou des fils de fers et similaire

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000050326A1 (fr) * 1999-02-23 2000-08-31 Iro Patent Ag Procede et dispositif de freinage modulable d'un fil en deroulement
US6505653B1 (en) 1999-02-23 2003-01-14 Iropa Ag Device and method for variably braking a running yard
BE1012559A3 (nl) * 1999-03-17 2000-12-05 Wiele Michel Van De Nv Inslagdraadrem voor een weefmachine.
WO2000064795A1 (fr) * 1999-04-27 2000-11-02 Iropa Ag Actionneur et tendeur de fil a frein pourvu d'un actionneur
EP1352868A3 (fr) * 1999-04-27 2004-01-02 Iropa Ag Actionneur
US6691744B1 (en) 1999-04-27 2004-02-17 Iropa Ag Actuator and thread brake comprising an actuator
DE10013625A1 (de) * 2000-03-18 2001-09-27 Dornier Gmbh Lindauer Fadenbremse, insbesondere Schussfadenbremse für Webmaschinen
US6418976B2 (en) 2000-03-18 2002-07-16 Lindauer Dornier Gesellschaft Mbh Thread brake system with a linear electric motor for weaving looms

Also Published As

Publication number Publication date
ES2053418T1 (es) 1994-08-01
DE9215226U1 (de) 1994-05-11
JPH06278943A (ja) 1994-10-04
JP3439244B2 (ja) 2003-08-25
ES2053418T3 (es) 1996-07-16
EP0597239B1 (fr) 1996-05-29
DE59302741D1 (de) 1996-07-04
US5492286A (en) 1996-02-20
ATE138698T1 (de) 1996-06-15

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