EP0831049B1 - Fadenliefergerät - Google Patents
Fadenliefergerät Download PDFInfo
- Publication number
- EP0831049B1 EP0831049B1 EP97116577A EP97116577A EP0831049B1 EP 0831049 B1 EP0831049 B1 EP 0831049B1 EP 97116577 A EP97116577 A EP 97116577A EP 97116577 A EP97116577 A EP 97116577A EP 0831049 B1 EP0831049 B1 EP 0831049B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensing element
- feeding device
- leg
- yarn feeding
- element body
- 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
- D03D47/36—Measuring and cutting the weft
- D03D47/361—Drum-type weft feeding devices
- D03D47/367—Monitoring yarn quantity on the drum
-
- 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 thread delivery device according to the preamble of claim 1.
- Such a thread delivery device is known from US-A-46 76 442.
- This thread delivery device has a metal leaf spring, a rubber spiral spring or a coil tension spring designed and arranged so that the sensing element body assumes the outer position when the spring is relaxed and is moved into the inner position by the thread against the force of the spring. At least that External position can be defined by a stop.
- the changes in movement of the Sensor element body between the outer and the inner layer are non-contact scanned (magnetic, inductive, opto-electronic, magnetoresistive, or similar), to determine whether or not there is thread on the sensing element body. From the Sampling are signals, for example, for controlling the drive motor of the thread delivery device derived.
- the spring is relatively progressive Spring characteristics.
- the operation of the sensor is against pollution, e.g. through fluff, sensitive. Such contamination affects the proper Movement of the sensing element body.
- contamination e.g. through fluff
- a Structural swivel axis of the sensing element body maintain contamination deposit just on the swivel axis, which is the proper function disturb or prevent sensitive.
- due to the undamped spring and its progressive spring characteristic a rocking effect of the sensing element body occur, the proper scanning and clear Useful signals difficult. This swinging effect arises when the Feeling element body from the thread, because then the sensing element body abruptly jumps outside and resonates. There is no clearly palpable outer layer, because the sensing element body over the actual outer layer to the outside and then swings back inside.
- the sensing element body tends to reverberate in the outer layer, causing faulty leaving the Outside location is registered, if necessary several times. This can lead to incorrect controls of the yarn delivery device, or can - if the sensing element body belongs to a thread break sensor - an incorrect shutdown signal is generated or there is no necessary shutdown signal. This critical response is negatively reinforced by the sensitivity of the spring and the Swivel bearing of the sensing element body.
- the invention has for its object a yarn delivery device with at least one specify spring-loaded sensing element body of a contactless thread sensor, in a structurally simple, inexpensive way, a quick, clear Response with high reliability and insensitivity to pollution and clear and clear useful signals can be reached.
- the sensing element body takes up the outer position precisely, as soon as it is exposed by the thread. There is no annoying ringing.
- the damped leg spring over the entire path of movement of the sensing element body generates almost the same force that is chosen just high enough that the thread and the thread movements are not affected by this affect each other Deposited impurities such as fluff do not particularly affect the response behavior can, since the damped leg spring takes over the movement of the sensing element body, a pivot bearing that is sensitive to contamination Sensor element bodies are eliminated. There are powerful and meaningful useful signals and incorrect or missing signals are avoided.
- the leg spring can take over the important function of the pivot bearing of the sensing element body and works dampened due to its construction.
- leg spring is Insensitive to contamination and cleans itself during operation.
- Leg springs are in many forms and specifications commercially available and inexpensive, and at the same time Very reliable over a long service life, since the deformation work extends over the entire Feather length distributed. In addition, the leg spring can be easily attached.
- the usual principle is abandoned in the outer layer of the sensing element body to generate the lowest possible force, which is the thread for adjustment the sensing element body has to overcome from the outer layer to the inner layer, because the force exerted by the sensing element body on the thread over the entire Movement path is essentially constant and relatively high.
- the leg spring is by the axle bolt according to claim 3, for damping can contribute, supported in every position of the sensing element body.
- the sensing element body moves in a radial plane of the Storage body.
- Favorable leverage ratios can be achieved.
- the available standing installation space is used well.
- the leg spring during the movement of the sensing element body deformed towards the inner position in the opening direction, and consequently with the opposite Direction of movement in the closing direction. This leads to taking the outer layer to avoid ringing.
- the outer layer can also be exactly predetermine what is important for signal sampling.
- the leg spring is in the outer position of the sensing element body biased against a stationary stop, so that the sensing element body a shows stable equilibrium without a tendency to reverberate.
- the stop allows it to take advantage of a precisely predetermined part of the spring characteristic, within whose spring force hardly changes.
- the stop is conveniently in Reference to the virtual swivel axis defined by the leg spring with optimal large lever arm arranged. In the contact area of the leg spring at the stop becomes a desirable self-cleaning effect through the working movement of the leg spring achieved.
- the support leg of the leg spring in the storage body fixed so that when working the leg spring practically the entire length of the spring is usable. This also applies to the embodiment according to claim 8.
- the sensing element body is permanently firmly on the freely projecting Leg attached.
- the leg spring can save space with its axle bolt and sheltered in the storage body.
- the insensitivity to pollution is caused by the top Coverage increased.
- the cover takes on the additional task of the stop to define the outer layer and dampens reverberation movements.
- the axle bolt acts as a friction damper in the outer layer or shortly before reaching the outside location.
- the forward movement of the thread along the storage body at low mechanical stress on the thread the response movement derived from the sensing element body.
- the integrated permanent magnet enables meaningful non-contact scanning for signal generation.
- a thread delivery device F according to FIG. 1 has a plurality of thread sensors, each of which the presence or absence of the thread in the scanning zone assigned to it responds and generates signals that are processed further.
- Detailed information for such a thread delivery device can be found in EP-B 0 171 516 and US-A 4,676,442, to which reference is hereby made.
- the thread delivery device F has a housing 2 with a holding arm 3, on which a Carrier 4 is attached with a thread take-off eye 5.
- the rotation turns the drive shaft a feed movement for the turns of one on the storage body 15 lying thread supply 26 generated. This could be changed Feed movement of the thread turns also caused in other ways become.
- the thread designated 27 in the draw-off area is through the thread winding member 6 tangentially wound on the storage body 15 and is from the thread supply 26th via a head part 22 or a withdrawal edge of the storage body 15 through the thread withdrawal eyelet 5 axially subtracted, e.g. through an intermittent thread-consuming Loom (not shown).
- a longitudinal recess 16 of the storage body 15 for example is delimited on the inside by a wall 17, here are for example several sensing element bodies of the thread sensors provided.
- a thread sensor 18, 20 monitors the maximum size of the thread supply 26.
- a thread sensor 19, 21 monitors the minimum size of the thread supply 26.
- a thread sensor 19 ', 21' monitors the at least first turn of the thread supply 26 (thread break monitor).
- Each thread sensor consists of the one between an outer layer (with the thread sensor 18, 20) and an inner layer caused by the thread (thread sensors 19, 21, 19 ', 21 ') movable sensing element body 18, 19, 19' and a sensing element 20, 21, 21 'in Holding arm 3.
- the sensing element generates in the outer or inner position of the sensing element body a useful signal.
- the useful signals for example, the drive motor in the Housing 2 controlled or a shutdown signal generated (in the event of a thread break).
- the storage body 15 is against co-rotation with the drive shaft 7 by cooperating Magnets 24 and 23 prevented.
- the magnets 23 are in this embodiment housed in a bracket 25. It is conceivable to use the magnets in the To arrange area of the take-up member 6.
- a filler 14 in the storage body 15 prevents the ingress of contaminants.
- each thread sensor is through a damped leg spring S, in the direction of the outer layer. He is pivotable about a virtual pivot axis, which is aligned approximately in the circumferential direction is.
- the sensing element bodies are only indicated schematically in FIG. 1 and are described in more detail with reference to FIG. 2.
- an axle bolt 28 is arranged, which carries the leg spring S, which has a support leg 30 (anchored in the storage body 15), several helical turns 29, and has a freely projecting leg 31.
- the axle pin 28 defines with its axis 28 'the virtual pivot axis of the sensing element body 19, 32.
- the outer layer A of the sensing element body 19, 32 shown in FIG. 2 is correct Outer diameter of the axle bolt 28 approximately with the inner diameter of the Coil spring turns 29 match.
- the freely projecting leg 31 extends from the underside of the surface facing away from the surface of the storage body 15 Coil spring turns 29 obliquely upwards and is in the sensing element body 34 fixed.
- the sensing element body 32 contains a permanent magnet 33, which is scanned by the respectively assigned sensing element 21, 20, 21 ' will (distance detection).
- a stop 35 for the freely projecting Leg 31 represents and defines the outer layer A.
- the leg 31 of the leg spring S with prestress on the stop 35 By the thread is (shown in dashed lines) the sensing element body 18 in the inner layer B. transferable, this movement acting on the leg spring S in the opening direction.
- the stop 35 could also be in the path of movement of the sensing element body 18 be arranged directly (as with the thread sensor on the left in FIG. 2), or with a larger one Lever arm as the stop 35 shown.
- the leg spring S with the coil spring turns 29 can Almost fill in the width of the recess 16.
- the support leg 30 by one bent coil spring turn 30 'protrudes approximately parallel to the axle bolt 28, is inserted into an abutment in the storage body or another abutment, so that when moving from the outer to the inner position the entire length of the spring is used for the deformation.
- the axle pin 28 is expedient set in the walls of the recess 16.
- the freely projecting leg 31 ends in a fastening section 40, which is fixed in the block 32 of the sensing element body 32 is, for example according to FIG. 4.
- a first upward bend 41 of the cantilevered leg 31 continues with another bend 42 continues, which runs approximately parallel to the axis 28 'and in an upward direction vertically angled part 43 runs out.
- a transverse, open downward groove 38 is formed, in the middle of one penetrates in approximately vertical bore 39.
- the bend 43 is in the bore 39th inserted, and e.g. glued, the bend 42 lies within the groove 38.
- a leg spring is used as the damped leg spring S, which is constructed symmetrically with two end support legs 30, running between them Coil spring turns 29 and the double, freely projecting Leg 31 with its fastening section 40 '.
- the axle pin 28 is in the coil spring turns 29 fitted.
- the freely projecting leg 31 is over the Ramp 32 'continued with an extension 31', at the end of which the permanent magnet 33 is arranged.
- the ramp 32 'could be directly by bending the Leg 31 may be shaped (or as a separate block according to FIG. 2).
- Fig. 7 indicates in a diagram (spring force P over the deformation stroke, deformation angle ⁇ ) indicates that the spring S has a spring characteristic C that is linear and runs almost horizontally.
- B hardly notices the force exerted by the spring too, e.g. only from 4.0 to 4.7 g. With a force of 4.0 g, the spring lies against the stop 35 on.
- the damping of the spring S could be increased by an axle pin made of elastic material, through intermediate layers of elastic material between the coil spring angles, by one applied to the coil spring windings Covering (hose) or the like
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
- Tape Measures (AREA)
- Springs (AREA)
- Looms (AREA)
Description
- Fig. 1
- einen Achsteilschnitt eines Liefergeräts mit mehreren Fadensensoren, in schematischer Darstellung,
- Fig. 2
- eine vergrößerte Schnittansicht zu Fig. 1,
- Fig. 3
- eine Draufsicht zu Fig. 2,
- Fig. 4
- eine Perspektivansicht zu Fig. 3,
- Fig. 5
- schematisch eine Detailvariante in einer Draufsicht,
- Fig. 6
- eine weitere Detailvariante in einer Seitenansicht, und
- Fig. 7
- ein Diagramm zur Federcharakteristik der verwendeten Feder.
Claims (16)
- Fadenliefergerät (F) mit einem wenigstens einen Fühlelementkörper (19, 19', 20) eines berührungslosen Fadensensors aufweisenden Speicherkörper (15) für einen aus Windungen (26) bestehenden Fadenvorrat, wobei der Fühlelementkörper im Speicherkörper zwischen einer Innenlage (B) und einer Außenlage (A) um eine Schwenkachse (28') beweglich gelagert und durch wenigstens eine gedämpfte Feder (S) in Richtung zur Außenlage (A) beaufschlagt ist, dadurch gekennzeichnet, daß die Feder (S) eine Schenkelfeder mit mehreren, die Schwenkachse (28') des Fühlelementkörpers (19, 19', 20) definierenden Schraubenfederwindungen (29) und einem frei auskragenden und den Fühlelementkörper tragenden Schenkel (31) ist.
- Fadenliefergerät nach Anspruch 1, dadurch gekennzeichnet, daß die Schenkelfeder (S) - zumindest innerhalb des Verformungsbereichs zwischen Innen- und Außenlage (A, B) - eine weitgehend lineare, nur schwach ansteigende, vorzugsweise nahezu horizontale, Federkennline (C) aufweist.
- Fadenliefergerät nach Anspruch 1, dadurch gekennzeichnet, daß im Inneren der Schraubenfederwindungen (29) ein Achsbolzen (28) angeordnet ist.
- Fadenliefergerät nach Anspruch 3, dadurch gekennzeichnet, daß die Schwenkachse (28') bzw. der Achsbolzen (28) annähernd in Umfangsrichtung des trommelförmigen Speicherkörpers (13, 15) ausgerichtet ist.
- Fadenliefergerät nach Anspruch 1, dadurch gekennzeichnet, daß die Schenkelfeder derart ausgebildet und angeordnet ist, daß sie bei der Bewegung des Fühlelements (32, 32')aus der Außenlage (A) in ihren Schraubenfederwindungen (29) im Öffnungssinn verformt wird.
- Fadenliefergerät nach Anspruch 1, dadurch gekennzeichnet, daß im Speicherkörper (13, 15) ein die Außenlage (A) definierender Anschlag (35) für den Schenkel (31) oder den Fühlelementkörper vorgesehen ist, und daß die Schenkelfeder in der Außenlage (A) gegen den Anschlag (35) vorgespannt ist, vorzugsweise mit einer Vorspannkraft, die nur geringfügig unter der Innenlage-Federkraft liegt.
- Fadenliefergerät nach Anspruch 1, dadurch gekennzeichnet, daß wenigstens ein Abstützschenkel (30) der Schenkelfeder im Speicherkörper festgelegt ist.
- Fadenliefergerät nach Anspruch 7, dadurch gekennzeichnet, daß der Abstützschenkel (30) an einem Ende der Schraubenfederwindungen (29) und der frei auskragende Schenkel (31) am anderen Ende der Schraubenfederwindungen (29) vorgesehen ist.
- Fadenliefergerät nach wenigstens einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Fühlelementkörper (19, 19', 20) ein Block (32) mit einer oberseitigen Rampe (36) und an seiner der Rampe (36) abgewandten Unterseite (37) eine Quernut (38) und eine zur Quernut (38) in etwa senkrechte Haltebohrung (39) für ein Z-förmig abgekröpftes Ende (40) des frei auskragenden Schenkels (31) aufweist.
- Fadenliefergerät nach wenigstens einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der Fühlelementkörper (19, 19', 20) mit der Schenkelfeder (S) in einem nach außen offenen, U-förmigen Längskanal (16) des Speicherkörpers (15) zwischen den Kanalwänden angeordnet ist, und daß der Achsbolzen (28) in den Kanalwänden abgestützt ist.
- Fadenliefergerät nach Anspruch 10, dadurch gekennzeichnet, daß im Längskanal (16) eine oberseitige Abdeckung (34), vorzugsweise mit U-förmigem Querschnitt, für die Schraubenfederwindungen (29) vorgesehen ist, an der, vorzugsweise, der die Außenlage (A) definierende Anschlag (35) vorgesehen ist.
- Fadenliefergerät nach wenigstens einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß der Außendurchmesser des Achsbolzens (28) im wesentlichen dem Innendurchmesser der Schraubenfederwindungen (29) in der Außenlage (A) des Fühlelementkörpers entspricht.
- Fadenliefergerät nach Anspruch 1, dadurch gekennzeichnet, daß die Schenkelfeder mit zwei Abstützschenkeln (30) an den beiden außenliegenden Enden der Schraubenfederwindungen (29) versehen ist, und daß der frei auskragende Schenkel (31) doppelt und in einem Mittelbereich der Schraubenfederwindungen (29) angeordnet ist.
- Fadenliefergerät nach wenigstens einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß der frei auskragende, den Fühlelementkörper tragende Schenkel (31) sich von der der Oberfläche des Speicherkörpers (15) abgewandten Unterseite der Schraubenfederwindungen (29) schräg nach außen oben erstreckt.
- Fadenliefergerät nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Fühlelementkörper wenigstens einen baulich eingegliederten Permanentmagneten (33) enthält.
- Fadenliefergerät nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der frei auskragende Schenkel (31) nahe seinem freien Ende einen Permanentmagneten (33) trägt, und daß eine Rampe (32') bzw. der Fühlelementkörper (32) näher bei der Schwenkachse (28') angeordnet ist als der Permanentmagnet (33).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19639036A DE19639036A1 (de) | 1996-09-23 | 1996-09-23 | Fadenliefergerät |
DE19639036 | 1996-09-23 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0831049A2 EP0831049A2 (de) | 1998-03-25 |
EP0831049A3 EP0831049A3 (de) | 1998-06-10 |
EP0831049B1 true EP0831049B1 (de) | 2001-12-12 |
Family
ID=7806634
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97116577A Expired - Lifetime EP0831049B1 (de) | 1996-09-23 | 1997-09-23 | Fadenliefergerät |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0831049B1 (de) |
DE (2) | DE19639036A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITTO20050810A1 (it) * | 2005-11-18 | 2007-05-19 | Lgl Electronics Spa | Rilevatore di scorta trama per dispositivi alimentatori di trama |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0171516B1 (de) * | 1984-08-16 | 1989-03-08 | Aktiebolaget Iro | Fadenspeicher- und -liefervorrichtung |
US5211347A (en) * | 1990-06-29 | 1993-05-18 | Sobrevin Societe De Brevets Industriels-Etablissement | Thread feed device |
-
1996
- 1996-09-23 DE DE19639036A patent/DE19639036A1/de not_active Withdrawn
-
1997
- 1997-09-23 DE DE59705750T patent/DE59705750D1/de not_active Expired - Fee Related
- 1997-09-23 EP EP97116577A patent/EP0831049B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE19639036A1 (de) | 1998-03-26 |
DE59705750D1 (de) | 2002-01-24 |
EP0831049A2 (de) | 1998-03-25 |
EP0831049A3 (de) | 1998-06-10 |
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