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EP 1 331 650 B1 |
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EUROPEAN PATENT SPECIFICATION |
(45) |
Mention of the grant of the patent: |
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28.07.2010 Bulletin 2010/30 |
(22) |
Date of filing: 20.01.2003 |
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International Patent Classification (IPC):
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(54) |
Method and associated apparatus for reducing the tension of wires during a strand
production process
Verfahren und Apparat zum Reduzieren der Zugkraft in Drähte während eines Seilherstellungsverfahrens
Méthode et appareil de réduction de tension dans des fils lors d'un processus de fabrication
d'un câble
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Designated Contracting States: |
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AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR |
(30) |
Priority: |
24.01.2002 IT MI20020120
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(43) |
Date of publication of application: |
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30.07.2003 Bulletin 2003/31 |
(73) |
Proprietor: Leoni Felisi S.p.A. |
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Milano (IT) |
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Inventor: |
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- D'Ottavi, Vicenzo
Castorano,
(AP) (IT)
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(74) |
Representative: Raimondi, Margherita et al |
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Dott. Ing. Prof. Alfredo Raimondi S.r.l.,
Piazzale Cadorna, 15 20123 Milano 20123 Milano (IT) |
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Note: Within nine months from the publication of the mention of the grant of the European
patent, any person may give notice to the European Patent Office of opposition to
the European patent
granted. Notice of opposition shall be filed in a written reasoned statement. It shall
not be deemed to
have been filed until the opposition fee has been paid. (Art. 99(1) European Patent
Convention).
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[0001] The present invention relates to a method and an associated apparatus for reducing
the tension of wires during a process for production of a strand using said wires.
[0002] It is known in the technical sector relating to the production of conductor strands
and the like that said strands are made from a wire or a plurality of wires wound
onto a supply reel from which the wire(s) is/are unwound so as to be fed to the stranding
machine which forms the bundles of wires, imparts one or more twists to them and winds
the strand thus formed onto a take-up reel.
[0003] It is also known that the movement of the wire is determined by the stranding machine
which pulls the wires, unwinding them from the supply reel at a predetermined speed.
[0004] Owing to the sliding friction which arises during the various steps of the process,
the wire is however subject to slackening and/or tensioning and, in order to compensate
for this, the supply reel is equipped with an arm for adjusting the unwinding speed;
said arm has a roller onto which the wire is wound and is connected to means for adjusting
the speed of rotation of the said reel.
[0005] During the winding process the wire is subject to a tension in the longitudinal direction
which is permitted and regulated within certain limits, since it tends to equalize
the behaviour of different wires wound onto the same reel and wires wound onto different
reels.
[0006] This tension in the wire, however, gives rise to drawbacks since it increases the
tensile load on the wire, deteriorating its functional characteristics and results
in the need to increase the driving load of the stranding machine with the consequent
need for larger dimensions and an increase in the costs associated with the said machine.
[0007] An exemple of the prior art according to the preamble of claims 1, 8 and 16 is disclosed
into
EP 0 352 049.
[0008] The technical problem which is posed, therefore, is that of providing a method and
an apparatus which allows a reduction in the tension produced on the wire during winding
thereof onto a reel, for example of a stranding machine.
[0009] Within the context of this problem a further requirement is that said apparatus should
be simple and inexpensive to realise and also applicable to machines of the traditional
type without the need for major modifications.
[0010] These technical problems are solved according to the present invention by a method
for reducing the tension of wires during a process for production of a strand using
said wires, according to the characteristics of claim 1.
[0011] The present invention also relates to an apparatus for reducing the tension of wires
during a process for forming a strand according to the characteristics of claim 8.
[0012] Further details may be obtained from the following description of a non-limiting
example of embodiment of the invention, provided with reference to the accompanying
plates of drawings in which:
- Figure 1 shows a functional diagram of a plant of the conventional type for forming
a strand;
- Figure 2 shows a diagram similar to that of Fig. 1 with an apparatus for reducing
the tension of the wire, according to the present invention;
- Figure 3 shows a view of an example of embodiment of the tension-reducing apparatus
according to the present invention; and
- Figures 4a-4c show schematic views of examples of differently adjusted arrangements
of a second embodiment of the apparatus according to the invention.
[0013] As illustrated in Fig. 1, a conventional plant for forming a strand 2 from at least
one wire 1 comprises essentially a reel 10 for supplying the wire(s) 1, a device 20
for guiding the wire(s) entering a stranding machine, schematically shown together
with the associated winding reel 30. In the example according to Fig. 1, the guiding
device schematically shown is of the type able to impart a single twist to the wire,
but, although not illustrated, the stranding machine may comprise means able to impart
a double twist to the wires before they are wound onto the reel 30.
[0014] The supply reel 10 is connected to an arm 11 for adjusting its speed of rotation,
which arm is in turn connected to the wires being unwound.
[0015] Fig. 2 shows the plant according to Fig. 1 equipped with an apparatus 100 for reducing
the tension of the wires to which the wires 1 are subject during the process for forming
and winding a strand 2, which apparatus is arranged in a position between the supply
reel 10 and the point of entry into the stranding machine in the direction of feeding
of the wires 1.
[0016] For the sake of brevity below, the apparatus according to the invention will also
be called a tension-reducing apparatus.
[0017] As illustrated in Fig. 3, the tension-reducing apparatus 100 according to the invention
is substantially formed by a first roller 111 which is motorized and by a second drive
roller 112 which is idle, the wires 1 being made to pass between said rollers.
[0018] The first motorized roller 111 is rotated by means of an associated controlled motor
111a which imparts a speed of rotation of the roller such as to produce a peripheral
speed which is slightly greater than the driving speed of the stranding machine.
[0019] The motor 111a is also connected to a speed control device 120, for example of the
type called "encoder", onto which one of the wires 1 fed to the stranding machine
is wound; said device is able to detect the speed of the roller and send corresponding
signals to actuating means able to vary the speed of rotation of the motor 111a and
therefore the corresponding roller 111.
[0020] The second idle roller 112 is mounted on an associated frame 112a which is movable
translationwise parallel to the direction of feeding of the wires 1 so as to produce
a relative position of the two rollers 111,112 such as to allow adjustment of the
winding angle of the said wires 1 around the first motorized roller as illustrated
in Figs. 4a to 4c where a winding angle of 90° is modified to a winding angle of about
180°.
[0021] The greater the winding angle of the wires 1 on the active roller 111, the greater
will be the effect of the apparatus and therefore the reduction in the tension exerted
on the wires leaving the apparatus; this allows obviously the working conditions of
the said apparatus to be adjusted in relation to the different characteristics of
the wires 1 to be wound and/or the strands 2 to be formed.
[0022] As illustrated in Fig. 3 in broken lines it is also possible to envisage that the
second roller 112 is in turn motorized by means of a motor 111b which is also regulated
by the encoder signal and imparts to the second roller 112 a speed of rotation which
is substantially the same as that of the first roller 111 and therefore slightly greater
than the speed of feeding of the wire. Since the tension-reducing effect is substantially
determined by the winding angle on the first motorized (or active) roller - or by
the sum of the winding angles on all the active rollers - it follows that, for the
same reduction in tension on the wires 1, the motorization of the second roller 112
results in winding angles of the wires on the two active rollers which are smaller
than those required in the case of an idle second roller, also allowing the mechanical
design of the apparatus to be simplified.
[0023] According to the present invention, a method for reducing the longitudinal tension
of wires 1 forming the components of a strand 2 to be wound onto a reel 30 of a stranding
machine is also defined, said method envisaging the following steps:
- unwinding at least one wire 1 from a supply reel;
- feeding the unwound wire 1 to a stranding machine which pulls the wire, winding it
onto a take-up reel 31 at a predefined winding speed;
said at least one wire being subjected to a pulling/pushing action in the same sense
as the direction of feeding thereof, along the section of the travel path between
the supply reel and the point of entry into the stranding machine.
[0024] In a preferred embodiment, said pulling/pushing action is obtained by means of application
of a sliding friction to the wire; said sliding friction being determined by the pulling/pushing
action of a roller on which the wire is wound at a predefined winding angle depending
on the characteristics of the wire and the strand to be formed.
[0025] Said winding angle is normally between 60° and 300° and preferably between 90° and
240°.
[0026] The roller which applies the pulling/pushing force to the wire is rotationally actuated
so as to have a speed slightly greater than the speed of driving of the wire by the
stranding machine.
[0027] Preferably the peripheral speed of the roller is greater than the speed of driving
of the wire by an amount ranging between 2% and 10% of the latter.
[0028] With application of the method for reducing the tension of the wire according to
the invention it has been experimentally established that, when manufacturing 84-strand
conductors of the smooth bunch type having a wire diameter of 0.40 mm (84x0.40), the
cross-section is much more uniform and geometrically regular.
[0029] In addition to the above the winding quality control parameters improve as shown
in the following table:
PARAMETER |
WITH
TENSION-REDUCER |
WITHOUT
TENSION-REDUCER |
Elongation of wires (%) |
20.8 |
13.6 |
Electrical resistance (ohm/kg) |
1.74 |
1.84 |
1. Method for reducing the tension of wires (1) during a process for production of a
strand (2) using said wires (1) , comprising the steps of:
- unwinding at least one wire (1) from a supply reel (10);
- feeding along a feeding direction the unwound wire (1) to a stranding machine (30)
which pulls the wire (1), winding it onto a take-up reel (31) at a predetermined winding
speed;
characterized in that said at least one wire (1) is subjected to a pulling/pushing action in the same sense
as the direction of feeding thereof, along the section of the travel path between
the supply reel and the point of entry into the stranding machine, by the fact that
said pulling/pushing action is applied by an apparatus comprising a first roller (111)
and a second roller (112), which are spaced apart along a distance perpendicular to
the feeding direction, and at least one (111) of which is motorized (111a), said first
(111) and second (112) rollers being movable relative to each other in a direction
parallel to the feeding direction, allowing adjustment of a winding angle of the at
least one wire (1).
2. Method according to Claim 1, characterized in that said pulling/pushing action is obtained by means of application of a sliding friction
to the wire (1).
3. Method according to Claim 2, characterized in that said sliding friction is determined by the pulling/pushing action of a pair of motorized
rollers (111,112) on which the wire (1) is wound at a predefined winding angle.
4. Method according to Claim 3, characterized in that said winding angle is between 60° and 300°.
5. Method according to Claim 4, characterized in that said winding angle is preferably between 90° and 240°.
6. Method according to Claim 1, characterized in that the roller (111) which applies the pulling/pushing action to the wire (1) is rotationally
actuated so as to have a speed greater than the speed of driving of the wire by the
stranding machine (30).
7. Method according to Claim 6, characterized in that the speed of rotation of the motorized roller (111,111a) is greater than the speed
of driving of the wire by an amount ranging between 2% and 10% of the latter.
8. Apparatus for reducing the tension of the wires (1) during a process for forming a
strand (2) wound onto a reel of a stranding machine (30) using at least one wire (1)
fed from a supply reel (10,11), along a feeding direction characterized in that it comprises means (111,112) able to impart to said at least one wire (1) a pulling/pushing
action in the same sense as the direction of feeding of the said wire (1), said pulling/pushing
means (100) being located along the section of the travel path between the supply
reel (10,11) and the winding reel (30) prior to the stranding machine (30), and
comprising as said means (111,112) at least one first roller (111) which is motorized
and able to impart said pushing/pulling action and a second drive roller (112) which
is idle, the wires (1) being wound around said rollers, in that
said first (111) and second (112) rollers are parallel to each other and in that
said second roller (112) is movable translationwise relative to the first roller (111),
to allow adjustment of the winding angle of the wire (1) around the rollers.
9. Apparatus according to Claim 8, characterized in that said pushing means comprise at least one first motorized roller (111) able to impart
said pushing/pulling action and at least one second motorized roller (112), around
which rollers the wires (1) are wound.
10. Apparatus according to Claim 8, characterized in that said first motorized roller (111) is rotated at a speed of rotation greater than
the winding speed of the reel (30) of the stranding machine.
11. Apparatus according to Claim 10, characterized in that the speed of rotation of the motorized roller (111) is greater than the speed of
driving of the wire (1) by an amount preferably ranging between 2% and 10% of the
latter.
12. Apparatus according to Claim 8, characterized in that said first motorized roller (111) is rotated at a speed of rotation greater than
the winding speed of the stranding machine and said second motorized roller (112)
is rotated at a speed substantially the same as that of the first roller.
13. Apparatus according to Claim 8, characterized in that it comprises a device (120) for controlling the speed of rotation of the motorized
roller(s) on which one of the wires (1) fed to the stranding machine (30) is wound.
14. Apparatus according to claim 13, characterized in that said control device (120) is able to detect the speed of the roller and send corresponding
signals to actuating means able to vary the speed of rotation of the motor (111a,111b)
for actuating the motorized roller(s).
15. Apparatus according to Claim 8, characterized in that the angle of winding of the wire (1) around the motorized roller(s) is between 60°
and 300'.
16. Plant for forming strands (2) from wires (1), in which at least one stranding machine
with a winding reel (30) and at least one reel (10,11) for feeding at least one wire
(1) are envisaged, characterized in that it comprises an apparatus for reducing the tension of said at least one wire (1),
according to claim 8.
1. Verfahren zur Herabsetzung der Spannung von Drähten (1) bei einem Herstellungsprozess
eines Kabels (2) aus den genannten Drähten (1), das folgende Schritte umfasst:
- Abwickeln mindestens eines Drahtes (1) von einer Versorgungsspule (10);
- Zuführen des abgewickelten Drahtes (1), in einer Zuführungsrichtung, zu einer drahtziehenden
Kabelwickelmaschine (30), und Aufwickeln desselben auf eine Aufnahmespule (31) bei
einer vorbestimmten Wickelgeschwindigkeit ;
dadurch gekennzeichnet, dass der mindestens eine Draht (1) einer Zug-und Schubwirkung in derselben Richtung wie
dessen Zuführungsrichtung entlang dem Abschnitt des Bewegungspfades zwischen der Versorgungsspule
und dem Eintrittspunkt in die Kabelwickelmaschine unterworfen wird, dadurch, dass
die genannte Zug- und Schubwirkung durch einen Apparat aufgebracht wird, der eine
erste Rolle (111) und eine zweite Rolle (112) umfasst, die um einen zur Zuführungsrichtung
senkrechten Abstand voneinander getrennt sind, und mindestens eine der Rollen (111)
motorisiert ist (111 a), wobei die genannte erste (111) und zweite Rolle (112) in
einer Richtung parallel zur Zuführungsrichtung einander gegenüber verschiebbar sind
und die Regelung eines Wicklungswinkels des mindestens einen Drahtes (1) erlauben.
2. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet dass die genannte Zug- und Schubwirkung durch Anwendung einer Gleitreibung an den Draht
(1) erreicht wird.
3. Verfahren gemäß Anspruch 2, dadurch gekennzeichnet dass die genannte Gleitreibung durch die Zug- und Schubwirkung eines Paares von motorisierten
Rollen (111, 112) erreicht wird, auf die der Draht (1) mit einem vorbestimmten Wicklungswinkel
gewickelt wird.
4. Verfahren gemäß Anspruch 3, dadurch gekennzeichnet dass der genannte Wicklungswinkel zwischen 60° und 300° beträgt.
5. Verfahren gemäß Anspruch 4, dadurch gekennzeichnet dass der genannte Wicklungswinkel vorzugsweise zwischen 90° und 240° beträgt.
6. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet dass die Rolle, die die Zug-und Schubwirkung auf den Draht (1) ausübt, drehbar derart
betätigt wird, dass ihre Geschwindigkeit größer als die Antriebsgeschwindigkeit des
Drahtes seitens der Kabelwickelmaschine (30) ist.
7. Verfahren gemäß Anspruch 6, dadurch gekennzeichnet dass die Drehgeschwindigkeit der motorisierten Rolle (111, 111 a) um einen Betrag im Bereich
zwischen 2% und 10% größer als die Antriebsgeschwindigkeit des Drahtes ist.
8. Apparat zur Herabsetzung der Spannung der Drähte (1) bei einem Verfahren zur Formung
eines auf eine Spule einer Kabelwickelmaschine (30) gewickelten Kabels (2) unter Verwendung
von mindestens einem von einer Versorgungsspule (10, 11) entlang einer Zuführungsrichtung
gespeisten Draht (1), dadurch gekennzeichnet, dass er Mittel (111, 112) umfasst, die imstande sind, dem genannten mindestens einem Draht
(1) eine Zug- und Schubwirkung in derselben Richtung wie die der Zuführungsrichtung
des genannten Drahtes (1) zu verleihen, wobei die genannten Zug- und Schubvorrichtungen
(100) entlang dem Abschnitt des Bewegungspfads zwischen der Zuführungsrolle (10, 11)
und der aufwickelnden Rolle (30) vor der Kabelwickelmaschine (30) liegen, die genannten
Mittel (111, 112) mindestens eine erste Rolle (111) umfassen, die motorisiert und
imstande ist, die genannte Zug- und Schubwirkung auszuüben, eine zweite Antriebsrolle
(112) sich im Leerlauf befindet und die Drähte (1) um die genannten Rollen gewunden
werden, und dass die genannten ersten (111) und zweiten (112) Rollen parallel zueinander
stehen und dass die genannte zweite Rolle (112) der ersten Rolle (111) gegenüber beweglich
verschiebbar ist, um eine Regelung des Wicklungswinkels des Drahtes (1) um die Rollen
zu erlauben.
9. Apparat gemäß Anspruch 8, dadurch gekennzeichnet, dass die genannten Schubvorrichtungen jeweils mindestens eine erste motorisierten Rolle
(111) umfassen, die die genannte Zug- und Schubwirkung auszuüben vermag, und mindestens
eine zweite motorisierte Rolle (112) umfassen, und die Drähte (1) um diese Rollen
gewunden werden.
10. Apparat gemäß Anspruch 8, dadurch gekennzeichnet, dass die genannte erste motorisierte Rolle (111) mit einer Drehgeschwindigkeit rotiert
wird, die größer als die Wickelgeschwindigkeit der Spule (30) der Kabelwickelmaschine
ist.
11. Apparat gemäß Anspruch 10, dadurch gekennzeichnet, dass die Drehgeschwindigkeit der motorisierten Rolle (111) um einen Betrag größer als
die Antriebsgeschwindigkeit des Drahtes (1) ist, der vorzugsweise in einem Bereich
zwischen 2% und 10% des letzteren liegt.
12. Apparat gemäß Anspruch 8, dadurch gekennzeichnet, dass die genannte erste motorisierte Rolle (111) mit einer größeren Drehgeschwindigkeit
als die Wickelgeschwindigkeit der Kabelwickelmaschine rotiert wird, und die genannte
zweite motorisierte Rolle (112) mit einer Geschwindigkeit rotiert wird, die im Wesentlichen
dieselbe wie die der ersten Rolle ist.
13. Apparat gemäß Anspruch 8, dadurch gekennzeichnet, dass er mindestens eine Vorrichtung (120) zum Kontrollieren der Drehgeschwindigkeit der
motorisierten Rolle(n) umfasst, der (denen) einer der Drähte (1) der Kabelwickelmaschine
(30) zugeführt wird.
14. Apparat gemäß Anspruch 13, dadurch gekennzeichnet, dass die genannte Kontrollvorrichtung (120) imstande ist, die Geschwindigkeit der Rolle
zu erfassen und entsprechende Signale an Betätigungsvorrichtungen auszusenden, um
die Drehgeschwindigkeit des Motors (111a, 111b) zum Betätigen der motorisierten Rolle(n)
zu ändern.
15. Apparat gemäß Anspruch 8, dadurch gekennzeichnet, dass der Wicklungswinkel des Drahtes (1) um die motorisierte Rolle(n) zwischen 60° und
300° beträgt.
16. Anlage für die Herstellung von Kabeln (2) aus Drähten (1), in der mindestens eine
Wickelmaschine mit einer Wicklungsspule (30) und mindestens eine Spule (10, 11) für
die Zuführung von mindestens einem Draht (1) vorgesehen werden, dadurch gekennzeichnet, dass sie einen Apparat für die Herabsetzung der Spannung des genannten mindestens einen
Drahtes (1) gemäß Anspruch 8 umfasst.
1. Procédé permettant de réduire la tension dans des fils (1) pendant un processus de
fabrication d'un câble (2) utilisant lesdits fils (1), comportant les étapes comprenant
de :
- dérouler au moins un fil (1) à partir d'une bobine d'alimentation (10) ;
- fournir suivant une direction d'alimentation le fil déroulé (1) à une machine de
formation de câble (30) qui tire le fil (1), l'enrouler sur une bobine de réception
(31) à une vitesse d'enroulement prédéterminée ;
caractérisé en ce que ledit, au moins un, fil (1) est soumis à une action consistant à le tirer/pousser
dans le même sens que la direction suivant laquelle il est fourni, le long de la section
du chemin de circulation entre la bobine d'alimentation et le point d'entrée dans
la machine de formation de câble, par le fait que ladite action de tirer/pousser est
appliquée par un appareil comprenant un premier rouleau (111) et un second rouleau
(112), lesquels sont espacés l'un de l'autre le long d'une distance perpendiculaire
à la direction d'alimentation, et dont l'un au moins(111) est motorisé (111a), lesdits
premier (111) et second (112) rouleaux pouvant se déplacer l'un par rapport à l'autre
dans une direction parallèle à la direction d'alimentation, permettant un réglage
de l'angle d'enroulement du, au moins un, fil (1).
2. Procédé selon la revendication 1, caractérisé en ce que ladite action de tirer/pousser est obtenue au moyen de l'application d'une friction
de glissement au fil (1).
3. Procédé selon la revendication 2, caractérisé en ce que ladite friction de glissement est déterminée par l'action de tirer/pousser d'une
paire de rouleaux motorisés (111, 112) sur lesquels le fil (1) est enroulé suivant
un angle d'enroulement prédéterminé.
4. Procédé selon la revendication 3, caractérisé en ce que ledit angle d'enroulement se situe entre 60° et 300°.
5. Procédé selon la revendication 4, caractérisé en ce que ledit angle d'enroulement se situe, de préférence, entre 90° et 240°.
6. Procédé selon la revendication 1, caractérisé en ce que le rouleau (111) qui applique l'action de tirer/pousser sur le fil (1) est actionné
à rotation de façon à avoir une vitesse plus grande que la vitesse d'entraînement
du fil par la machine de formation de câble (30).
7. Procédé selon la revendication 6, caractérisé en ce que la vitesse de rotation du rouleau motorisé (111, 111a) est supérieure à la vitesse
d'entraînement du fil d'une quantité se situant entre 2% et 10% de cette dernière.
8. Appareil permettant de réduire la tension sur des fils (1) pendant un processus de
fabrication d'un câble (2) enroulé sur une bobine d'une machine de formation de câble
(30) utilisant au moins un fil (1) fourni à partir d'une bobine d'alimentation (10,
11) suivant une direction d'alimentation, caractérisé en ce qu'il comporte des moyens (111, 112) capables de communiquer au dit au moins un fil (1)
une action consistant à le tirer/pousser dans le même sens que la direction de fourniture
dudit fil (1), lesdits moyens pour tirer/pousser (100) étant placés le long de la
section du parcours de circulation entre la bobine d'alimentation (10, 11) et la bobine
d'enroulement (30) avant la machine de formation de câble (30), et comprenant en tant
que dits moyens (111, 112) au moins un premier rouleau (111) qui est motorisé et qui
est capable de communiquer ladite action consistant à tirer/pousser et un second rouleau
d'entraînement (112) qui est libre, les fils (1) étant enroulés autour desdits rouleaux,
en ce que lesdits premier (111) et second (112) rouleaux sont parallèles l'un à l'autre et
en ce que ledit second rouleau (112) peut se déplacer en translation par rapport au premier
rouleau (111) afin de permettre un réglage de l'angle d'enroulement du fil (1) autour
des rouleaux.
9. Appareil selon la revendication 8, caractérisé en ce que lesdits moyens de pousser comportent au moins un premier rouleau motorisé (111) capable
de communiquer ladite action de pousser/tirer et au moins un second cylindre motorisé
(112), rouleaux autour desquels les fils (1) sont enroulés.
10. Appareil selon la revendication 8, caractérisé en ce que ledit premier rouleau motorisé (111) tourne à une vitesse de rotation supérieure
à la vitesse d'enroulement de la bobine (30) de la machine de formation de câble.
11. Appareil selon la revendication 10, caractérisé en ce que la vitesse de rotation du rouleau motorisé (111) est supérieure à la vitesse d'entraînement
du fil (1) d'une quantité se situant de préférence entre 2% et 10% de cette dernière.
12. Appareil selon la revendication 8, caractérisé en ce que ledit premier rouleau motorisé (111) tourne à une vitesse de rotation supérieure
à la vitesse d'enroulement de la machine de formation de câble et en ce que ledit second rouleau motorisé (112) tourne a une vitesse essentiellement identique
à celle du premier rouleau.
13. Appareil selon la revendication 8, caractérisé en ce qu'il comporte un dispositif (120) pour commander la vitesse de rotation du rouleau (des
rouleaux) motorisé(s) sur lequel (lesquels) l'un des fils (1) fourni à la machine
de formation de câble (30) est enroulé.
14. Appareil selon la revendication 13, caractérisé en ce que ledit dispositif de commande (120) est capable de détecter la vitesse du rouleau
et d'envoyer des signaux correspondants aux moyens d'actionnement capables de modifier
la vitesse de rotation du moteur (111a, 111b) permettant d' actionner le (les) rouleau(x)
motorisé(s).
15. Appareil selon la revendication 8, caractérisé en ce que l'angle d'enroulement du fil (1) autour du (des) rouleau(x) motorisé(s) se situe
entre 60° et 300°.
16. Usine de fabrication de câbles (2) à partir de fils (1), dans laquelle au moins une
machine de formation de câble pourvue d'une bobine d'enroulement (30) et d'au moins
une bobine (10, 11) servant à fournir au moins un fil (1) sont envisagées, caractérisée en ce qu'elle comprend un appareil permettant de réduire la tension dudit au moins un fil (1)
selon la revendication 8.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only.
It does not form part of the European patent document. Even though great care has
been taken in compiling the references, errors or omissions cannot be excluded and
the EPO disclaims all liability in this regard.
Patent documents cited in the description