EP0564921B1 - Rotor pour machine de câblage - Google Patents

Rotor pour machine de câblage Download PDF

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Publication number
EP0564921B1
EP0564921B1 EP93104997A EP93104997A EP0564921B1 EP 0564921 B1 EP0564921 B1 EP 0564921B1 EP 93104997 A EP93104997 A EP 93104997A EP 93104997 A EP93104997 A EP 93104997A EP 0564921 B1 EP0564921 B1 EP 0564921B1
Authority
EP
European Patent Office
Prior art keywords
cable
channel
revolution
axis
rotating
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
EP93104997A
Other languages
German (de)
English (en)
Other versions
EP0564921A1 (fr
Inventor
Vitaliano Russo
Antonio Marsilia
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.)
Nexans Italia SpA
Original Assignee
Alcatel Cavi SpA
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Filing date
Publication date
Application filed by Alcatel Cavi SpA filed Critical Alcatel Cavi SpA
Publication of EP0564921A1 publication Critical patent/EP0564921A1/fr
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Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B3/00—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material
    • D07B3/08—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the take-up reel rotates about the axis of the rope or cable or in which a guide member rotates about the axis of the rope or cable to guide the rope or cable on the take-up reel in fixed position and the supply reels are fixed in position
    • D07B3/10—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the take-up reel rotates about the axis of the rope or cable or in which a guide member rotates about the axis of the rope or cable to guide the rope or cable on the take-up reel in fixed position and the supply reels are fixed in position with provision for imparting more than one complete twist to the ropes or cables for each revolution of the take-up reel or of the guide member
    • D07B3/103—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the take-up reel rotates about the axis of the rope or cable or in which a guide member rotates about the axis of the rope or cable to guide the rope or cable on the take-up reel in fixed position and the supply reels are fixed in position with provision for imparting more than one complete twist to the ropes or cables for each revolution of the take-up reel or of the guide member characterised by the bow construction
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B3/00—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/02—Machine details; Auxiliary devices
    • D07B7/021—Guiding means for filaments, strands, ropes or cables

Definitions

  • the present invention relates generally to a cable forming machine and in particular to a light-rotor static closer.
  • Such devices are suitable only for helping the cable to rotate about its axis along the path of the machine in order to avoid that it is braked during rotation and thus maintaining a relative motion between parts of the machine (substantially rotating members normally called fliers) and the cable itself. This is particularly important especially when using materials for cables which are unable to transmit sufficient elastic torques capable of overcoming the support reactions and frictions caused by them along the path of the cable itself.
  • An intrinsic drawback of the above-mentioned known devices is that they require to rotate the cable through members substantially rotating at the same velocity of the cable and which at the same time transmit to the cable a suitable tensile stress state in the section of cable coming from the source i.e. the compacting point and allows the section of the cable downstream from such rotating member, to have the minimum tensile stress on the cable necessary to overcome the longitudinal frictions caused by support reactions distributed along the path of the cable.
  • This tensile stress in the terminal portion of the cable path is usually generated in the takeup area through suitable means generally but not necessarily located in the cable end collection area.
  • EP-A-0 461 844 discloses a stranding machine combining the features of the monotorsion system (i.e., a perfectly formed cable section and lay through a haul-off device) with those of the double-twist system (i.e., the final storage bobbin rotated only about its own axis for winding but otherwise stationary and thus not causing stresses generated by centrifugal force which limits the maximum speed at which the cable itself can be rotated, thus limiting the production speed of the complete installation).
  • the monotorsion system i.e., a perfectly formed cable section and lay through a haul-off device
  • the double-twist system i.e., the final storage bobbin rotated only about its own axis for winding but otherwise stationary and thus not causing stresses generated by centrifugal force which limits the maximum speed at which the cable itself can be rotated, thus limiting the production speed of the complete installation.
  • the in-line double-twist machine is made to serve solely as a means for taking up the cable out a stationary winding bobbin, i.e., the cable is led through a rotating cradle or flyer and the path is radially spaced from the rotatinal axis of the flyer and is turned through 180° before exiting from the flyer thus cancelling the rotation of the cable caused by the haul-off device.
  • the twisting of the cable due to friction against guide means during its planetary or orbital motion about the axis of the cradle is prevented by causing the guide means to be driven to rotate relatively to the flyer in such a way that they remain stationary relatively to the cable.
  • the rotation of the cable is not completely cancelled at the output of the rotating flyer because in the double-twist section the ratio is not exactly 1 : 2 as well known to those skilled in the art and hence the section of the cable is slightly deformated.
  • the slight twist optionally imparted to the cable by the cradle is not a suffcient remedy.
  • the present invention has for its object to overcome the above-mentioned drawbacks of the prior art closers.
  • the invention is based on the underlying idea of creating for the cable a rotating environment located preferably, but not necessarily, in the portion of the cable path in which the cable has to invert its advancing direction to be laid on the takeup bobbin and such as not only to help the cable in rotating about its axis but to force it to rotate by giving at its periphery the necessary revolving speed in a "natural” way and transmitting the rotation to the point of compacting the wires or elementary strands thus obtaining the desired cord.
  • numeral reference 1 indicates the guide channel whose longitudinal axis is curved substantially in the form of a "question mark”.
  • the bending radius depends upon the diameter of the cable.
  • the channel is divided into elementary sections 3. Each section is realized in the form of a tube (fig.2) supported at its ends by means of bearings 4 e.g. ball bearings.
  • Adjacent channel sections are connected each other by means 5 capable of transmitting rotation between subsequent sections with such a convergence angle as necessary for obtaining the desired arcuate configuration of the channel.
  • the inner surface of the channel (fig.3) is preferably covered by an epoxy resin coating 6 (of the type used e.g. in drawplates, guides for chains, etc) and having each portion corresponding to each channel section shaped substantially like a revolution surface. It is constructed in such a way that the generating line in contact with the cable 9 corresponds necessarily to the configuration assumed by the cable.This is obtained by taking the portion of the plane line shaped like the natural path of the cable and comprised between the two ends of the channel section and considering this portion of line as the generating line with which the desired surface necessary for the cable can be constructed by revolution about the axis of the channel section.
  • the channel sections are mounted consecutively on the machine member (not shown) for supporting the cable by disposing them on a trellis (not shown) rigidly connected with a rotor 2 which rotates it.
  • the curved channel so formed is moved epicycloidally by the machine member itself if the end B, of the succession of channel sections, oriented toward the cable takeup area, is fixed, through lock means 7, to a point having a differential motion capable of making the tip speed of the channel section generating line in contact with the cable equal to the (rotation) tip speed of the cable (cable and channel section necessarily have different diameters).
  • differential lock means may consist simply in a clutch.
  • the channel described above is preferably, but not necessarily, inserted in a section of the cable path where the cable itself has to invert, with respect to an absolute observer, the direction of its longitudinal motion, i.e. in the area where the cable coming from the source inverts its advancing direction in order to be laid on the takeup bobbin 8 or given up to a pull group which does not rotate with the cable.
  • This static pull group can be e.g. a simple or double capstan, an axial caterpillar or a multiroll.
  • the above-described closer operates as follows.
  • the cable coming from the compacting point 10 is passed through the guide channel.
  • the cable settles along a geodetic line and therefore along a generating line of the channel itself and which represents a stable path for the cable.
  • the guide channel Upon rotation of the trellis through known and conventional means, the guide channel revolves with it about the axis along which the cable is disposed at the compacting point, called revolution central axis, and, having its end B constrained, the channel will rotate also about its axis as indicated in fig.1.
  • n is the revolution speed of the trellis
  • the speed at which the free end A of the channel revolves about its axis is 2n according to the double-twist principle, so that at the outlet end B the cable is stationary and therefore can be taken up.
  • the cable does not slide along the support on the generating line of the guide channel, but it is made rolling along the internal perimetric edge of the channel, while the torsion-vector is transmitted in a complete way.
  • the rotating channel according to the invention forces the cable to rotate about its own axis also in presence of strong support reactions.
  • this device it is possible to realize a static closer which does not need heavy stretch and torsion rotating members mentioned at the outset, located between the source and take-up station.
  • the known system of three pulleys arranged at 120 degrees and connected each other to allow longitudinal skidding of the cable may be used.
  • the portion of the path represented with dashed line can be channelized in order to have the end A of the channel on the revolution central axis as indicated in fig.1, still maintaining the kinematic ratio between the two ends of the channel as required by the double twist principle.

Landscapes

  • Ropes Or Cables (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (6)

  1. Machine de câblage statique à rotor léger du type dans lequel le câble (9) est toronné en lui appliquant une torsion qui est transmise le long du câble jusqu'à un point (10) où les fils ou les torons sont compressés et qui est situé à l'extérieur de la machine de câblage, et dans lequel ledit câble est disposé le long d'un trajet composé d'une partie linéaire adjacente audit point de compression et d'un trajet curvilinéaire faisant une boucle de 180° avant de sortir pour être enroulé sur une bobine d'enroulement (8), ledit trajet curvilinéaire étant établi par le moyen d'un tunnel de guidage (1) rotatif de forme curvilinéaire consistant en une pluralité de sections tubulaires (3) raccordées entre elles de façon cinématique, et abritant le câble (9) à l'intérieur de celui-ci, ledit tunnel rotatif étant traîné par le mouvement général du trajet du câble, grâce auquel une torsion est appliquée exclusivement par ledit tunnel rotatif, ce dernier étant soumis à deux mouvements une rotation autour de son axe curvilinéaire et une révolution autour d'un axe rectiligne qui coïncide avec ladite partie linéaire du trajet, ces deux mouvements étant régulés de telle façon que, lorsque le tunnel tout entier (1) tourne d'une révolution autour dudit axe rectiligne, l'extrémité d'entrée du câble (A) du tunnel est entraînée en rotation pour deux tours complets autour de son axe, caractérisé en ce que ladite surface intérieure du tunnel rotatif est formée de telle façon que sa ligne génératrice en contact avec le câble correspond à la configuration adoptée par le câble dans la partie respective du trajet arqué compris entre les deux extrémités de celui-ci.
  2. Machine de câblage selon la revendication 1, caractérisée en ce que ledit tunnel (1) a une extrémité de sortie du câble (B) fixée sur le support fixe de la bobine d'enroulage par l'intermédiaire d'un embrayage (7).
  3. Machine de câblage selon la revendication 1, caractérisée en ce que ladite extrémité (A) du tunnel a son centre sur ledit axe rectiligne.
  4. Machine de câblage selon les revendications 1 et 2, caractérisée en ce que chacune desdites sections tubulaires a sa surface intérieure revêtue de résine époxy (6).
  5. Machine de câblage selon la revendication 1, caractérisée en ce que lesdites sections tubulaires sont raccordées les unes aux autres par une paire de roues dentées coniques.
  6. Machine de câblage selon l'une quelconque des revendications précédentes, caractérisée en ce que, entre ledit point de compression (10) et ledit tunnel rotatif (1c) est disposé un groupe (ia, ib), qui comprend :
    - un deuxième tunnel rotatif (1a) identique au premier tunnel rotatif mentionné (1c) et orienté de la même façon,
    - un groupe de tirage statique (11) situé à la sortie dudit deuxième tunnel, et
    - un troisième tunnel rotatif (1b) identique au deuxième, situé à la sortie dudit groupe de tirage dans une position symétrique au deuxième tunnel par rapport audit axe central de révolution de telle façon qu'il prend sensiblement une configuration de S, lesdits deuxième et troisième tunnels n'accomplissant qu'une révolution unique autour dudit axe central de révolution, ladite révolution ayant le même sens et la même vitesse que la révolution du premier tunnel mentionné.
EP93104997A 1992-04-07 1993-03-26 Rotor pour machine de câblage Expired - Lifetime EP0564921B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI920838 1992-04-07
ITMI920838A IT1258282B (it) 1992-04-07 1992-04-07 Cordatrice statica a rotore leggero

Publications (2)

Publication Number Publication Date
EP0564921A1 EP0564921A1 (fr) 1993-10-13
EP0564921B1 true EP0564921B1 (fr) 1997-02-05

Family

ID=11362818

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93104997A Expired - Lifetime EP0564921B1 (fr) 1992-04-07 1993-03-26 Rotor pour machine de câblage

Country Status (6)

Country Link
EP (1) EP0564921B1 (fr)
AT (1) ATE148749T1 (fr)
DE (1) DE69307940T2 (fr)
DK (1) DK0564921T3 (fr)
ES (1) ES2099854T3 (fr)
IT (1) IT1258282B (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL29545C (fr) * 1929-10-29
DE69031175T2 (de) * 1989-05-08 1997-12-04 Yazaki Corp Vorrichtung zur Herstellung von verseilten Drähten und Maschine zur Herstellung von konzentrisch verseilten Drähten
ES2098324T3 (es) * 1990-06-11 1997-05-01 Cortinovis Spa Mejoras en/y referentes a maquinas trenzadoras.

Also Published As

Publication number Publication date
ATE148749T1 (de) 1997-02-15
ITMI920838A1 (it) 1993-10-07
IT1258282B (it) 1996-02-22
ITMI920838A0 (it) 1992-04-07
ES2099854T3 (es) 1997-06-01
EP0564921A1 (fr) 1993-10-13
DE69307940T2 (de) 1997-07-03
DK0564921T3 (da) 1997-06-16
DE69307940D1 (de) 1997-03-20

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