EP0578301B1 - Bobine de fil ou câble métallique - Google Patents

Bobine de fil ou câble métallique Download PDF

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Publication number
EP0578301B1
EP0578301B1 EP93201828A EP93201828A EP0578301B1 EP 0578301 B1 EP0578301 B1 EP 0578301B1 EP 93201828 A EP93201828 A EP 93201828A EP 93201828 A EP93201828 A EP 93201828A EP 0578301 B1 EP0578301 B1 EP 0578301B1
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EP
European Patent Office
Prior art keywords
windings
spool
winding
final winding
combination according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93201828A
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German (de)
English (en)
Other versions
EP0578301A1 (fr
Inventor
Bernard Van Severen
Willy Coopman
John Verhaeghe
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.)
Bekaert NV SA
Original Assignee
Bekaert NV SA
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 Bekaert NV SA filed Critical Bekaert NV SA
Priority to EP93201828A priority Critical patent/EP0578301B1/fr
Publication of EP0578301A1 publication Critical patent/EP0578301A1/fr
Application granted granted Critical
Publication of EP0578301B1 publication Critical patent/EP0578301B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H65/00—Securing material to cores or formers
    • B65H65/005—Securing end of yarn in the wound or completed package

Definitions

  • the invention relates to a spool filled with an elongated metal element which is wound onto the spool with a plurality of windings.
  • the term "spool” also refers to a bobbin and/or a reel.
  • the spool may be made of metal or of a synthetic material.
  • the invention also relates to a method of and an apparatus for winding an elongated element in a plurality of windings onto a spool.
  • Elongated metal elements such as steel wires, non-ferro wires and steel cords are conveniently wound on spools for storage at the wire or cord manufacturers and for transport to the customers.
  • the design of the spool and/or the process of winding must fulfill a plurality of requirements in order to be automated appropriately.
  • a first requirement is that no damaging on the elongated element must occur during the winding process and during the finishing of the winding process.
  • a second requirement is that waste of the elongated element is to be avoided. This means that, after being unwound, the elongated element should be used over its entire length, i.e. from the trailing end (the cord end at full spool) to the cord end at empty spool.
  • a third requirement is that fixing means used to fix the trailing end during the winding process must not lead to residual products which fall on the floor during the subsequent unwinding process and which pollute the working environment.
  • a fourth requirement is that no time losses must occur during winding and unwinding. This means that the fixing and unfixing of the trailing end should be done in a short time period.
  • FR-A-2 283 848 discloses a combination of a spool and an elongated element according to the preamble of claim 1.
  • the method steps (i), (ii), (iii) and (iv) of claim 14 are known from FR-A-2 283 848, with exception of the radius of curvature feature.
  • a combination of a spool and an elongated element wherein said elongated element is wound onto the spool with a plurality of windings.
  • the elongated element is an elongated metal element and has a bending stiffness which is greater than 10 Nmm 2 , preferably greater than 100 Nmm 2 , e.g. about 150 Nmm 2 , as measured by the Taber stiffness tester.
  • the plurality of windings end with a final winding and n windings preceding the final winding (hereafter called the "n preceding windings").
  • the number n is herein greater than or equal to one.
  • the final winding comprises a beginning part, a middle part and a trailing end.
  • the middle part is under one or more of the n preceding windings in order to secure the final winding to the rest of the elongated element.
  • the beginning part and the trailing end are at the same side of the n preceding windings.
  • the final winding has a radius of curvature of at least 45 mm.
  • An advantage of the spool according to the invention is that no additional fixing means ought to be used so that pollution of the working environment is completely avoided.
  • Another advantage is that the final winding may be easily released : a simple and short pull on the trailing end suffices to free the final winding from under the n preceding windings and the unwinding process is ready to start. No elongated element is hereby wasted. Plastically deformed final windings are avoided.
  • the number n of preceding windings is greater than or equal to one, preferably greater than or equal to two, for example, greater than or equal to four.
  • a sufficient number of windings should be provided in order to secure the fixing of the final winding during storage and during transport.
  • the number of windings should not exceed a maximum allowable limit, since releasing the final winding with a small pull should still remain possible. In this sense, the number of n preceding windings must not exceed ten to twelve, depending upon the kind of elongated element which is to be wound.
  • the tension in the n preceding windings should be such that, on the one hand, fixing is secured during handling and transport, and, on the other hand, releasing the final winding with a small pull is possible.
  • the final winding of the elongated metal element has a radius of curvature on the filled spool which is preferably at least 60 mm, e.g. at least 80 mm or 100 mm. Smaller radii of curvature would lead to elongated metal elements with plastically deformed final windings, which means that the final winding is no longer useable.
  • the middle part of the final winding extends under at least one of the n preceding windings over an angle which is greater than 90°, e.g. greater than 135° or 180°, this angle being measured from the axis of the spool. Smaller angles would again lead to elongated metal elements with plastically deformed final windings, which means that the elongated metal element is no longer useable over its entire length.
  • the final winding of the elongated metal element has no parts which have been plastically deformed in one or another way during the winding process : only an elastic deformation has taken place. Moreover, no other damage on the elongated element has taken place. Hence, the elongated metal element is useable from the very trailing end at the full spool.
  • the distance between two subsequent windings in the spool, as measured parallel with the central axis of the spool, can be smaller than 10 mm, and may be about 4-5 mm.
  • the n preceding windings are adjacent to each other.
  • the trailing end of the elongated element is not longer than 50 cm, e.g. smaller than 35 cm or 25 cm.
  • the spool has a filling degree which is smaller than 78 per cent, e.g. smaller than 70 per cent, where the filling degree is defined as the cross-sectional surface of the elongated metal element devided by the cross-sectional surface needed by the elongated metal element on the spool.
  • the plurality of windings end with a final winding and n preceding windings.
  • the number n is greater than or equal to one.
  • the final winding comprises a beginning part, a middle part and a trailing end.
  • the method comprises the steps of :
  • the tension is usually greater than 10 N and smaller than 100 N.
  • the minimum value is dictated by reasons of securing the fixing during handling and transport.
  • the maximum value is dictated by reasons of easily releasing of the final winding. Normally the tension is smaller one third of the breaking load of the elongated metal element.
  • step (i) to (v) does not necessarily mean that the different steps occur in the numbered sequence.
  • holding the trailing end of the final winding fixed - step (ii) - may occur before increasing the length of the n preceding windings - step (i).
  • step (iv) necessarily occurs after steps (i), (ii) and (iii), and steps (v) and (vi) necessarily occur after step (iv).
  • the above-mentioned method comprises steps which may all be automated.
  • Step (i) - increasing the length of the n preceding windings - may be carried out in several ways.
  • a first way is to provide holding means which are located radially outward of the spool and to wind the n preceding windings over these holding means.
  • a second way comprises following steps :
  • Step (v) - decreasing the length of the n preceding windings - may be done by rotating the spool relatively to the final winding in the winding direction.
  • FIG. 1 shows a spool 10 according to the prior art.
  • the spool 10 comprises a plurality of windings of an elongated metal element 12.
  • the spool 10 has two flanges 14. At least one of these flanges 14 comprises a hole 16 located near the radially outer border of the flange 14.
  • a clamp 18 is fixed to the outer side of the flange 14 near the hole 16.
  • the trailing end 20 of the elongated element 12 has been put through the hole 18 and is hold by means of the clamp 18.
  • Figures 2 and 3 show a spool 10 according to the first aspect of the present invention.
  • Figure 3 is a more simplified and schematical drawing made to simplify and clarify.
  • the diameter of the flanges of the spool is about 250 mm.
  • the distance between the flanges may be between 150 and 320 mm.
  • the capacity of these spools is from 15 to 40 kg of steel cord.
  • the outer diameter of the flanges is still somewhat greater than the outer diameter of the last windings of elongated element.
  • the elongated metal element has a bending stiffness which is greater than 10 Nmm 2 , preferably greater than 100 Nmm 2 .
  • Examples of bending stiffnesses for convential steel cord structures are as follows :
  • the plurality of windings 12 on the spool 10 end with a final winding 22 and four windings 24 which preceed the final winding 22 (hereinafter called the "four preceding windings").
  • the final winding 22 comprises a beginning part 26, a middle part 28 and a trailing end 20.
  • the middle part 28 is secured under at least one of the four preceding windings 24 to the rest of the elongated element 12.
  • the beginning part 26 and the trailing end 20 of the final winding 22 are at the same side of the four preceding windings 24 and are not covered by the preceding windings 24. A small, short pull is sufficient to free the final winding 22.
  • the middle part 28 extends under at least one of the four preceding windings 24 over an angle ⁇ which is greater than 90°. Nor the middle part 28 nor any other part of the final winding 22 forms a sharp curve ( Figure 3 is exaggerated in order to clearly show the different parts of the final winding 22). The final winding has not been plastically deformed and has not been damaged in another way.
  • An advantage of a spool according to Figures 2 and/or 3 with respect to a spool according to Figure 1, is that there is no need any more to keep the hole 16 free and uncovered. This means that one and the same spool 10 can have more weight of elongated element 12 since it can now be filled up to the outer border of the flanges 14.
  • FIG. 4 shows schematically an unwinding unit comprising a central bar 29, on the left and the right side of which axles 30 have been provided. Spools 10' (left side) and 10'' (right side) are placed on these axles 30 in order to be unwound.
  • the left spools 10' must be placed on the axles in a way that the flange 14 with the hole 16, the clamp 18 and the trailing end 20 is on the outermost left side and the right spools 10'' must be placed on the axles in a way that the flange 14 with the hole 16, the clamp 18 and the trailing end 20 is on the outermost right side.
  • the reason is that near to the central bar 29 (i.e. for the left spool 10' the right side and for the right spool 10'' the left side) there is no space enough to do the handlings of releasing the trailing end 20 from the clamp 18 and of withdrawing the trailing end 20 through the hole 16.
  • the way of securing the final winding 22 to the rest of the elongated element according to the invention has proved to be stable and reliable : even after several handling, storage and transport manipulations of a spool according to the first aspect of the invention, the final winding 22 remains, on the one hand, secured under the preceding windings 24, and, on the other hand, the final winding 22 can still be freed with a simple and short pull.
  • FIGS 5(a) until 5(h) schematically show the different steps of the method of winding according to the second aspect of the present invention.
  • the elongated element 12 is wound on spool 10 in a winding direction 33 with a high rotational speed. Once the spool 10 is full or once the desired weight has been reached, rotation of the spool 10 is stopped and the elongated element 12 is cut, thereby creating a trailing end 20 for the present full spool and a leading end (not shown) for the next empty spool (not shown). Referring to Figure 5(b), the trailing end 20 of the elongated element 12 is hold by means of a clamp 32, and two rollers 34 are positioned under the trailing end 20.
  • a gripper 38 is brought under the preceding windings 24 and grips the middle part 28 of the final winding 22.
  • the gripper may consist of a small rod which has been properly bent.
  • the gripper 38 brings the middle part 28 of the final winding 22 under the four preceding windings 24 in the space between the four preceding windings 24 and the rest of the elongated element.
  • the length of the four preceding windings 24 is decreased by winding the spool 10 in the direction of the arrow 40 (winding direction).
  • the space between the four preceding windings 24 and the rest of the elongated element is decreased and the pair of pliers 36 initially follows the movement of the four preceding windings 24 whilst maintaining the tension in the four preceding windings thanks to the spring 37.
  • the pair of pliers 36 releases the four preceding windings 24 which secure the middle part 28 of the final winding so that the gripper 38 can also be removed.
  • the spool and the method according to the invention have proved to function well for different kinds of metal wires and for different kinds of steel cord constructions, both for steel cord constructions with a wrapping filament and for steel cord constructions without a wrapping filament.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Winding Filamentary Materials (AREA)

Claims (19)

  1. Combinaison d'une bobine (10) et d'un élément allongé (12) enroulé sur la bobine avec plusieurs spires,
    les spires se terminant par une spire finale (22) et n spires (24) la précédant ("n spires précédentes"),
    n étant supérieur ou égal à 1,
    la spire finale comprenant une partie de début (26), une partie médiane (28) et une extrémité de queue (20),
    la partie médiane étant placée sous une ou plusieurs des n spires précédentes afin que la spire finale soit fixée au reste de l'élément allongé,
    la partie de début et l'extrémité de queue se trouvant du même côté des n spires précédentes,
       caractérisée en ce que l'élément allongé est un élément métallique allongé ayant une rigidité à la flexion qui est supérieure à 10 N.mm2 et la spire finale a un rayon de courbure d'au moins 45 mm.
  2. Combinaison selon la revendication 1, dans laquelle la partie médiane recouvre un angle (α) qui est supérieur à 90°, sous l'une au moins des n spires précédentes, l'angle étant mesuré par rapport à l'axe de la bobine.
  3. Combinaison selon la revendication 2, dans laquelle l'angle est supérieur à 180°.
  4. Combinaison selon l'une quelconque des revendications précédentes, dans laquelle la spire finale n'a que des parties qui sont déformées élastiquement au cours de l'opération d'enroulement.
  5. Combinaison selon la revendication 1, dans laquelle l'élément métallique allongé a une masse volumique d'au moins 7 g/cm3.
  6. Combinaison selon la revendication 1, dans laquelle n est supérieur ou égal à 2.
  7. Combinaison selon la revendication 6, dans laquelle n est supérieur ou égal à 4.
  8. Combinaison selon l'une quelconque des revendications précédentes, dans laquelle deux spires suivantes ont une distance axiale mutuelle qui est inférieure à 10 mm.
  9. Combinaison selon l'une quelconque des revendications précédentes, dans laquelle les n spires précédentes sont adjacentes mutuellement.
  10. Combinaison selon l'une quelconque des revendications précédentes, dans laquelle la bobine a un degré de remplissage inférieur à 78 %.
  11. Combinaison selon l'une quelconque des revendications précédentes, dans laquelle l'extrémité de queue ne dépasse pas 50 cm.
  12. Combinaison selon l'une quelconque des revendications précédentes, dans laquelle l'élément allongé est un câblé d'acier.
  13. Combinaison selon l'une quelconque des revendications 1 à 11, dans laquelle l'élément allongé est un fil d'acier.
  14. Procédé d'enroulement d'un élément métallique allongé (12) ayant une rigidité à la flexion supérieure à 10 N.mm2 en plusieurs spires sur une bobine (10),
    les spires se terminant par une spire finale (22) et n spires (24) la précédant ("n spires précédentes"),
    n étant supérieur ou égal à 1,
    la spire finale (22) comprenant une partie de début (26), une partie médiane (28) et une extrémité de queue (20),
    le procédé comprenant les étapes suivantes :
    (i) l'augmentation de la longueur des n spires précédentes avec maintien de la tension dans les n spires précédentes pour la création d'un espace entre les n spires précédentes et le reste de l'élément allongé,
    (ii) le maintien de l'extrémité de queue de la spire finale afin qu'elle soit fixe,
    (iii) la saisie de la partie médiane de la spire finale,
    (iv) la mise de la partie médiane de la spire finale sous les n spires précédentes, dans l'espace compris entre les n spires précédentes et le reste de l'élément allongé, afin que la spire finale forme une courbe dont le rayon de courbure est d'au moins 45 mm,
    (v) la réduction de longueur des n spires précédentes avec maintien de la tension des n spires précédentes afin que la spire finale soit fixée au reste de l'élément allongé, et
    (vi) la libération de la partie médiane de la spire finale.
  15. Procédé selon la revendication 14, dans lequel la tension est supérieure à 10 N et inférieure à 100 N.
  16. Procédé selon la revendication 14, dans lequel la tension est inférieure au tiers de la charge de rupture de l'élément métallique allongé.
  17. Procédé selon la revendication 14, dans lequel la longueur des n spires précédentes est augmentée, dans l'étape (i), par utilisation d'un dispositif de maintien placé radialement à l'extérieur de la bobine et par enroulement des n spires précédentes sur le dispositif de maintien.
  18. Procédé selon la revendication 15, dans lequel la longueur des n spires précédentes est augmentée, dans l'étape (i), par :
    (a) positionnement d'un dispositif de maintien radialement à l'extérieur de la bobine,
    (b) positionnement du dispositif de maintien sous l'extrémité de queue,
    (c) entraínement en rotation du dispositif de maintien par rapport à la bobine dans le sens d'enroulement sur n + 1 tours, et
    (d) déplacement de la spire finale du dispositif de maintien afin que seules les n spires précédentes restent sur le dispositif de maintien.
  19. Procédé selon l'une des revendications 14 à 18, dans lequel la longueur des n spires précédentes est réduite, dans l'étape (v), par entraínement en rotation de la bobine dans le sens d'enroulement.
EP93201828A 1992-07-09 1993-06-24 Bobine de fil ou câble métallique Expired - Lifetime EP0578301B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP93201828A EP0578301B1 (fr) 1992-07-09 1993-06-24 Bobine de fil ou câble métallique

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP92202092 1992-07-09
EP92202092 1992-07-09
EP93201828A EP0578301B1 (fr) 1992-07-09 1993-06-24 Bobine de fil ou câble métallique

Publications (2)

Publication Number Publication Date
EP0578301A1 EP0578301A1 (fr) 1994-01-12
EP0578301B1 true EP0578301B1 (fr) 1998-04-01

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Application Number Title Priority Date Filing Date
EP93201828A Expired - Lifetime EP0578301B1 (fr) 1992-07-09 1993-06-24 Bobine de fil ou câble métallique

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE514295C2 (sv) * 1999-05-03 2001-02-05 Skaltek Ab Förfarande och apparat för att till en ring upprulla en kabel, vajer, lina eller liknande

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0527047A1 (fr) * 1991-08-07 1993-02-10 Marshall Richards Barcro Limited Perfectionnements aux bobineuses et procédé d'enroulement du fil sur des bobines

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2442471C3 (de) * 1974-09-05 1978-08-03 Hacoba Textilmaschinen Gmbh & Co Kg, 5600 Wuppertal Vorrichtung zum Festlegen des Anfangsfadenendes von Garnspulen an automatischen Spuleinrichtungen
IT1186867B (it) * 1985-04-30 1987-12-16 S I M A Srl Soc Ind Meccaniche Apparato e metodo per la completa automatzione delle fasi di scarico e di ripresa del ciclo operativo diuna roccatrice e roche legate con un tale metodo ed apparato
NL8701685A (nl) * 1987-07-16 1989-02-16 Bekaert Sa Nv Werkwijze voor het vastzetten van draad op een van draad voorziene spoel; inrichting voor het vastzetten van draad op een van draad voorziene spoel alsmede spoel met daarop gewikkeld draad.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0527047A1 (fr) * 1991-08-07 1993-02-10 Marshall Richards Barcro Limited Perfectionnements aux bobineuses et procédé d'enroulement du fil sur des bobines

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