EP0816275B1 - Fadenbremse - Google Patents
Fadenbremse Download PDFInfo
- Publication number
- EP0816275B1 EP0816275B1 EP97109815A EP97109815A EP0816275B1 EP 0816275 B1 EP0816275 B1 EP 0816275B1 EP 97109815 A EP97109815 A EP 97109815A EP 97109815 A EP97109815 A EP 97109815A EP 0816275 B1 EP0816275 B1 EP 0816275B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- yarn
- brake according
- yarn brake
- thread
- brake
- 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
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
-
- 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
- D03D47/36—Measuring and cutting the weft
- D03D47/361—Drum-type weft feeding devices
- D03D47/364—Yarn braking means acting on the drum
- D03D47/365—Brushes
-
- 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
- B65H2601/00—Problem to be solved or advantage achieved
- B65H2601/50—Diminishing, minimizing or reducing
- B65H2601/52—Diminishing, minimizing or reducing entities relating to handling machine
- B65H2601/524—Vibration
Definitions
- the invention relates to a module that can be modified in its effect Thread brake according to the preamble of claim 1.
- Such a thread brake is described in WO 91/14032, described there in FIG. 5f.
- the thread brake according to the invention works with the storage drum a thread storage and delivery device together, the annular, movable brake elements elastically bendable bristles or the like form, which rest on the edge region of the drum.
- a discharge opening is formed through which the thread that can be pulled through between the braking elements running.
- the take-off opening forms a thread guide sleeve, which is movable in the axial direction.
- the thread take-off sleeve is also the holder of a holding element for the braking element.
- the thread guide sleeve is surrounded of two solenoids. By energizing one or other solenoid, the thread guide sleeve and thus the brake element is moved back and forth, so that the effect of the brake can be modulated between two braking positions.
- the thread guide sleeve is magnetic trained and thus acts with the solenoids together.
- Looms are with thread storage and delivery devices connected, which are provided with a thread take-off brake are.
- the thread brake is based on the type of yarn and the loom is customizable so that the best trigger tension is adjustable. With particularly slightly brittle Yarning may result in the need for the take-off tension to reduce them to very small values in order to Prevent weft breakage, which is a failure of the loom and a deterioration in quality has the consequence.
- the braking effect may Avoiding thread breaks a certain thread tension do not exceed.
- looms need in some phases of weft entry one minimal thread tension, thus a flawless way of working is possible.
- the train electromagnet should, for example Duration of 155 ° (approx. 43 ms).
- the Pressure electromagnet should, for example, for a period of (360 ° - 155 °) 57 ms. It is during a weft thread entry four brake changes necessary.
- the take-off speed with a rapier loom has a quasi sinusoidal shape.
- Working cycle will be up to one, for example at Accelerated 100 ° maximum.
- the Thread take-off except for a low transfer speed delayed at 180 °.
- the transfer takes place at approximately 180 ° to the second gripper.
- the thread brake is closed during the working cycle. at Reaching a certain take-off speed opens the thread brake and remains above the maximum of the thread take-off speed open to just before handover and to be closed again after the handover. After the transfer, the brake opens again until shortly before reaching the end of the subject.
- the invention has for its object a generic Thread brake with regard to the switching speed to improve.
- the end of the bobbin are on the thread guide sleeve
- Anchor plates attached, their distance from each other larger is called the axial length of the bearing housing.
- the bearing housing forms end stops for the anchor plate out.
- excitation one of the two electromagnets only the thread brake insufficiently accelerated.
- Magnetic force in a purely axial direction.
- the distance between the anchor plate and Kitchen sink Increased due to the known law the force acting on the anchor plate, so that an increasing acceleration that is linear with the movement the anchor plate is given. hereby switching times are significantly faster than with the State of the art.
- the Anchor plate runs preferably against a rubber buffer, which is designed as a rubber ring. Because of the increasing at a short distance from the bearing housing this rubber ring is compressed by magnetic force, until the anchor plate on the out preferably Soft iron existing bearing housing rests. The Air gaps in the magnetic system are then minimized so that a maximum holding effect is achieved. The damping in the final phase of the movement is designed that a ricochet and thus a possible one Vibration is prevented.
- the invention is the distance between the two anchor plates adjustable so that the stroke of the Thread brake is adjustable if, for example Wear or bend bristles designed brake elements.
- the bearing housing is preferably from the bobbin educated.
- the Anchor plate have an internal thread, which on a External thread of the thread guide sleeve can be screwed on.
- the position of the anchor plate can be changed using a lock nut be secured.
- the two coils are with one Control electronics connected to the coils with electricity applied.
- the control electronics are preferably of this type turned off that the electromagnet with a Pulse width modulation can be controlled. This points the control electronics on an oscillator.
- the control electronics can be connected to the Loom connected.
- the weaving machine sends via this line control signals with which the brake can be operated.
- The are preferably carried out by commands coming to the loom at such a time presupposed that the braking effect to the required Time occurs.
- the time offset takes into account the Brake flight phase during modulation.
- the control electronics may also be able to coil energize depending on their function. So is for example, possible in the time in which the brake is adjusted will energize the coil higher so that necessary changeover speed is reached. In the phase in which the brake is in one of the two braking positions is held, the coil becomes less strong energized so that wear or heating of the Coil is prevented.
- the invention is that end of the storage drum frustoconical. On the truncated cone surface lie the radially inward Bristles on the brake ring. The bristles are there and at an acute angle to the surface of the cone by moving the magnet armature into a distance position brought.
- the location of the electromagnet can also be chosen so that the bristles between two different brake positions shifted back and forth can be.
- a development of the invention enables it, the braking effect during the operation of the To be able to adjust looms.
- the location can do this the brake ring via a drive motor in the axial direction be adjusted.
- the sleeve that ends the carries both anchor plates is non-rotatable in the coil body axially displaceable.
- One of the two anchor plates prefers the one on the side facing away from the brake, is designed as a gear in which the toothing engages a drive gear.
- the gear is with connected to a threaded sleeve, which on the external thread of the tube sits so that a twist of the Gear causes an axial adjustment of the brake.
- the braking position can be detected with a sensor.
- the arrangement according to the invention relates to a ring brake 1, which has an annular body 19 which, for example. be clipped with a funnel-shaped holding member 5 can. Project radially inward from the ring body 19 Bristles 2. These bristles can be metal bristles, Trade plastic bristles or natural hair bristles.
- the ring brake 1 can also consist of a circular Brush with tufts made up of bristles, For example, the flexible wire are formed. This Tufts are of suitable planar or radial Slope facing the central area.
- the ring brush 1 is on the unwinding side of the weft to the End portion 3 of the drum 4 pressed.
- the end section the drum can either be rounded or but be designed as a truncated cone surface.
- Thread storage is the thread wind wound up by means of a winding arrangement and over Head through a thread take-off opening, which from the Thread guide sleeve 8 is formed, withdrawn, wherein the thread between the curved edge portion 3 of the Plate 4 and the bristles 2 lying thereon pulled through becomes.
- the edge section 3 and the bristles 2 form the two links of a thread brake.
- the unwinding tension of the thread is caused by the friction of the thread between the two links 2, 3 of the brake affected.
- the tension of the thread can be determined by the Impact of the bristles 2 can be influenced. This depends on their deflection. This means that an axial displacement of the ring body 19, the braking effect affected.
- the thread brake allows the ring body 19 between to move two defined axial positions back and forth.
- the ring body 19 is supported Holding member connected to the thread guide sleeve 8.
- the Connection of these two elements 5, 8 takes place via an armature disk 6, which is in front of the bearing housing the thread guide sleeve 8 is arranged.
- the Thread guide sleeve 8 passes through a central cavity a bobbin 9, which consists of soft iron.
- the thread guide sleeve 8 is inside the bearing housing 9 by means of bearings, for example sliding or ball bearings, in Axial bearing mounted.
- bearings for example sliding or ball bearings
- On her two End sides are 8 circular disk-shaped on the thread guide sleeve Armature plates 6, 7 attached.
- the Armature disk 6 is firmly connected to the thread guide sleeve 8 is and at the same time carries the holding member 5 is the armature disk 7 opposite the thread guide sleeve 8 relocatable and lockable.
- the armature disk 7 have an internal thread 13 which an external thread 12 of the thread guide sleeve is screwed on is.
- the axial position of the armature disk 7 can be secured by a lock nut 14.
- the bobbin 9 is via fastening means, not shown with the housing of the thread store connected.
- the coil former 9 has an axial position one behind the other two ring spools on which the thread guide sleeve 8 surrounded.
- the coil body has an end face 9 ring-shaped openings.
- rubber rings 11 are provided, which when the respective armature disk 6, 7 is in contact compress on the face of the bobbin 9.
- the air gap 11 between the end face of the coil body 9 and the anchor plate 6, 7 can be completely Armature disk shifted towards the front to zero can be reduced so that a minimization of the magnetic Resistance and thus an optimization of the holding force is achieved.
- the conical brush holder which is the holding element 5 trains, is with the plate or anchor 6 of the driving Electromagnets firmly connected.
- the armature disk 6 is at that time with that designed as a tube Thread guide sleeve 8 firmly connected.
- the tube 8 forms together with a jacket tube forming the opening 10 Core of the electromagnet, which of the two coils 15 and 16 is formed.
- the two coils 15 and 16 are through a disc-shaped central web 17 separated from each other.
- In the bobbin 9 trained annular cavities lie with enamelled copper wire wound, similar constructed coils 15, 16, which can be excited separately and the attracting or pressing active part of the double-acting electromagnet.
- the Thread guide sleeve 8 through which in not shown Way the drawn thread is conducted is within the opening 10 springless, freely displaceable between the two due to the axial position of the armature plates 6, 7 given stop positions.
- the two ends of the Thread guide sleeve 8 have ceramic sleeves 20, 21.
- a high level of efficiency and consequently an actuation to be able to achieve at high speed a double electromagnet 15, 16 with movable double anchors 6, 7 are provided so that the magnetic Attraction is fully exploitable without that part of it must be determined to be a Tension return spring.
- the electromagnet owns a movable armature so that the magnetic resistance and consequently the magnetomotive force is reduced can be.
- the magnetic resistance of the Magnetic circuit is the sum of the magnetic Given resistances, the air areas (11 and 12) high magnetic resistance and the metal areas (Iron) have a low resistance.
- Sleeve 8, Armature disk 6, 7 and coil former should therefore be made Soft iron, low carbon iron his. As a result, the magnetic flux predominantly runs in an iron material so that the resistance is minimized. The resistance is minimal if in the attracted position of the air gap 11 is zero becomes. Then only a little current is necessary, to hold the thread brake in this braking position.
- FIG. 4 is a simplified circuit diagram of the control shown. It is a PWM circuit (Pulse width modulation). This system is also under known as CLC (Current Logic Control).
- the oscillator O regularly gives set impulses to the S input of the bi-stable multivibrator B. By the respective The logic value "1" (high) is generated at the Q output the flip-flop.
- the control transistor T controls the Power MOS-FET MP and the MOS-FET MN in the saturation state.
- the operating voltage Va is therefore applied to the coil L. In the saturation phase of Power level (considering L as an ideal choke) the current increases linearly with time.
- the one at the negative input of the comparator C applied reference voltage VR only appears when the logical signal CTL (loom control) its has a high level.
- the potentiometer P permits it, the voltage value for VR and thus the current value to pretend for IL.
- the two coils, namely the Gebund the pressure spool 15, 16 are separated by two independent circuits each with the help of the signals CTL or their inverse signal controlled.
- the value of the holding current is about that five times less than the value of the set current; therefore the power loss is about 25 times smaller. 5 are the curves of the various signals displayed time-dependent within the control electronics.
- the armature is 7 formed as a gear provided with external teeth.
- a threaded sleeve 21 sits on the gearwheel, which is firmly connected to the gear.
- the threaded sleeve 21 is on the threaded portion 25 of the tube 8 screwed on, so that a rotation of the gear 7 Distance between the two anchors 6, 7 changed.
- Coil body 9 attached to a drive motor 24 whose drive shaft a toothed roller 23 is attached, which meshes with the external toothing of the gear 7. If the toothed roller 23 is driven in rotation, it screws the screw 21 via the external thread 25 of the guide sleeve 8. Slides during the axial displacement of the brake the external toothing of the gear 7 in the external toothing the toothed roller 23.
- a sensor 22 is arranged in the area of the front end of the thread guide sleeve 8, which has the external thread 25 on the thread take-off side.
- the sensor can be magnetic, triggered optically or by ultrasound.
- the sensor fulfills two functions. On the one hand he gives an immediate report if one is actually closed system movement has taken place. It can be So determine whether the brake operates as required has been. In a second mode of operation the motor function of the motor 24 is monitored by this sensor become. If, for example, the anchor 7 is tightened, the distance of the front end of the guide sleeve 8 to Sensor are determined so that the stroke can be checked is.
- the sensor 22 may be superfluous, if the drive motor 24 is a stepper motor is.
- the switching position of the thread brake is therefore in everyone State defines that one of the two coils 15, 16 are energized.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Forwarding And Storing Of Filamentary Material (AREA)
Description
- Fig. 1
- einen Schnitt durch eine skizzierte Fadenbremse in der ersten Bremsstellung,
- Fig. 2
- einen Schnitt gemäß Fig. 1 in der zweiten Bremsstellung,
- Fig. 3
- ein Detail des Spulengehäuses,
- Fig. 4
- ein Schaltbild der Steuerung,
- Fig. 5
- verschiedene Signale in ihrem zeitlichen Verlauf und
- Fig. 6
- ein weiteres Ausführungsbeispiel der Erfindung.
Claims (15)
- In ihrer Wirkung modulierbare Fadenbremse für eine Fadenspeicher- und -liefervorrichtung, bei welcher der windungsweise auf einer Speichertrommel (4) abgelegte Faden zwischen einem ersten, festen Bremselement (3) und einem auf dem ersten Bremselement aufliegenden zweiten, beweglichen und ringförmigen Bremselement (2) der Fadenbremse und durch eine in Trommelachsrichtung beabstandet von der Trommel liegende Abzugsöffnung hindurchziehbar ist, wobei die Abzugsöffnung von einer elektromagnetisch in Achsrichtung zwischen einer ersten und einer zweiten Stellung hin- und herbewegbaren Fadenführungshülse (8) ausgebildet wird, das bewegliche Bremselemen (2) fest mit der Fadenführungshülse (8) verbunden ist und die Fadenführungshülse in einem gehäusefesten, eine Spule aufweisenden Lagergehäuse (9) axial geführt ist, gekennzeichnet durch jeweils stirnendseitig der Spule (15, 16) an der Fadenführungshülse (8) befestigte Ankerplatten (4, 5), deren Abstand zueinander größer ist als die axiale Länge des Lagergehäuses (9), welches stirnseitige Anschläge für die Ankerplatten (6, 7) ausbildet.
- Fadenbremse nach Anspruch 1 dadurch gekennzeichnet, daß der Abstand der Ankerplatten (6, 7) einstellbar ist.
- Fadenbremse nach einem oder mehreren der vorhergehenden Ansprüche dadurch gekennzeichnet, daß die Anschläge von Gummipuffern, insbesondere Gummiringen (11) ausgebildet sind.
- Fadenbremse nach einem oder mehreren der vorhergehenden Ansprüche dadurch gekennzeichnet, daß der Spulenkörper (9) das Lagergehäuse bildet.
- Fadenbremse nach einem oder mehreren der vorhergehenden Ansprüche dadurch gekennzeichnet, daß zumindest eine der Ankerplatten (6, 7) ein Innengewinde aufweist, welches auf einem Außengewinde der Fadenführungshülse (8) aufschraubbar und mit einer Kontermutter (14) sicherbar ist.
- Fadenbremse nach einem oder mehreren der vorhergehenden Ansprüche dadurch gekennzeichnet, daß der magnetische Widerstand (Reluktanz) in der Haltestellung minimiert ist.
- Fadenbremse nach einem oder mehreren der vorhergehenden Ansprüche dadurch gekennzeichnet, daß die Fadenbremse mit einer Webmaschine signalverbunden ist und von der Webmaschine gesteuert ist.
- Fadenbremse nach einem oder mehreren der vorhergehenden Ansprüche dadurch gekennzeichnet, daß die Steuersignale der Webmaschine zeitvorversetzt kommen.
- Fadenbremse nach einem oder mehreren der vorhergehenden Ansprüche dadurch gekennzeichnet, daß die Spulen (15, 16) pulsweitenmoduliert angesteuert sind.
- Fadenbremse nach einem oder mehreren der vorhergehenden Ansprüche dadurch gekennzeichnet, daß die Spulenbestromung zeitlich unterschiedlich ist derart, daß der in der Bewegungsphase fließende Strom größer ist als der in der Haltephase fließende Strom.
- Fadenbremse nach einem oder mehreren der vorhergehenden Ansprüche dadurch gekennzeichnet, daß die Bremskraft ferngesteuert einstellbar ist.
- Fadenbremse nach einem oder mehreren der vorhergehenden Ansprüche dadurch gekennzeichnet, daß der Betätigungshub der Ankerplatten ferngesteuert einstellbar ist.
- Fadenbremse nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet daß eine Ankerplatte als außen verzahntes Zahnrad (7) ausgebildet ist und mit einer Außenverzahnung eines Einstellzahnrades (23) kämmt.
- Fadenbremse nach einem oder mehreren der vorhergehenden Ansprüche dadurch gekennzeichnet, daß das Einstellzahnrad (23) durch einen Elektromotor (24) antreibbar ist.
- Fadenbremse nach einem oder mehreren der vorhergehenden Ansprüche gekennzeichnet durch einen Sensor (22), welcher die axiale Stellung der Fadenführungshülse (8) detektiert und der Webmaschine quittiert, daß ein entsprechendes Stellsignal ausgeführt worden ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19625760 | 1996-06-27 | ||
DE19625760A DE19625760A1 (de) | 1996-06-27 | 1996-06-27 | Fadenbremse |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0816275A2 EP0816275A2 (de) | 1998-01-07 |
EP0816275A3 EP0816275A3 (de) | 1998-05-13 |
EP0816275B1 true EP0816275B1 (de) | 2002-05-15 |
Family
ID=7798187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97109815A Expired - Lifetime EP0816275B1 (de) | 1996-06-27 | 1997-06-17 | Fadenbremse |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0816275B1 (de) |
DE (2) | DE19625760A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19839272B4 (de) * | 1997-09-11 | 2007-02-01 | Iro Sweden Ab | Steuerbare Fadenbremse |
DE19919122A1 (de) * | 1999-04-27 | 2000-11-02 | Iro Patent Ag Baar | Aktuator und Fadenbremse mit einem Aktuator |
IT1308067B1 (it) * | 1999-06-01 | 2001-11-29 | Lgl Electronics Spa | Dispositivo di frenatura del filato, per alimentatore di trama,avente tempi di intervento ridotti |
IT1308066B1 (it) † | 1999-06-01 | 2001-11-29 | Lgl Electronics Spa | Dispositivo di comando di frenatrama, particolarmente per telaidi tessitura e simili |
DE102006001125A1 (de) * | 2006-01-09 | 2007-07-12 | Iro Ab | Fadenliefergerät und Bremskörper |
WO2019032007A1 (en) | 2017-08-08 | 2019-02-14 | Iro Aktiebolag | ADJUSTABLE WIRE BRAKE |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT8323187V0 (it) * | 1983-10-07 | 1983-10-07 | Roy Electrotex Spa | Struttura perfezionata di elettromagnete per arrestare lo svolgimento del filo di trama in dispositivi porgitrama per telai di tessitura. |
JPS6173568A (ja) * | 1984-09-18 | 1986-04-15 | Diesel Kiki Co Ltd | 電磁アクチユエ−タ |
JP2784674B2 (ja) * | 1989-12-05 | 1998-08-06 | 津田駒工業株式会社 | 織機の緯糸係止ピン装置 |
CZ281873B6 (cs) * | 1990-03-12 | 1997-03-12 | Iro Ab | Brzdný systém pro nanášecí válec příze s měnitelným účinkem |
IT1251209B (it) * | 1991-09-20 | 1995-05-04 | Lgl Electronics Spa | Dispositivo di frenatura autoregolante del filato per apparecchi alimentatori di trama. |
-
1996
- 1996-06-27 DE DE19625760A patent/DE19625760A1/de not_active Withdrawn
-
1997
- 1997-06-17 EP EP97109815A patent/EP0816275B1/de not_active Expired - Lifetime
- 1997-06-17 DE DE59707256T patent/DE59707256D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE19625760A1 (de) | 1998-01-02 |
EP0816275A3 (de) | 1998-05-13 |
DE59707256D1 (de) | 2002-06-20 |
EP0816275A2 (de) | 1998-01-07 |
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