EP0103963B1 - Appareil pour le tordage mutuel d'au moins deux fils - Google Patents

Appareil pour le tordage mutuel d'au moins deux fils Download PDF

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Publication number
EP0103963B1
EP0103963B1 EP19830304424 EP83304424A EP0103963B1 EP 0103963 B1 EP0103963 B1 EP 0103963B1 EP 19830304424 EP19830304424 EP 19830304424 EP 83304424 A EP83304424 A EP 83304424A EP 0103963 B1 EP0103963 B1 EP 0103963B1
Authority
EP
European Patent Office
Prior art keywords
twisting
stranding
wires
tube
station
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
Application number
EP19830304424
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German (de)
English (en)
Other versions
EP0103963A3 (en
EP0103963A2 (fr
Inventor
Jean Marc Roberge
John Nicholas Garner
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of EP0103963A2 publication Critical patent/EP0103963A2/fr
Publication of EP0103963A3 publication Critical patent/EP0103963A3/en
Application granted granted Critical
Publication of EP0103963B1 publication Critical patent/EP0103963B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/02—Stranding-up
    • H01B13/0235—Stranding-up by a twisting device situated between a pay-off device and a take-up device

Definitions

  • This invention relates to apparatus for stranding at least two wires together to form a wire unit.
  • the stranding of wires together offers physical and electrical advantages when the wires are individually insulated conductors as used in communications or other electrical systems. For example, the stranding of pairs or units of wires as used in telephone systems improves electrical characteristics such as reducing cross-talk.
  • a twisting means at the downstream end of the tubular member twists the member by rotating the downstream end of the member for a predetermined number of revolutions, first in one direction and then the other, to torsionally twist the member in reversing manner.
  • a twist is imposed upon each wire by the twisting means and this twist causes the wires to strand together along their lengths as the wires emerge from the twisting means.
  • apparatus for stranding wires comprises at least two tubes each defining a passage for wire, the tubes rotatably flexible about a common axis to torsionally twist the tubes together around the axis to enable each of the wires to be given a twist by the twisting means while the tubes prevent the wires from twisting together.
  • the tubes are prevented from moving towards or away from each other during the twisting operation and a resilient means is used at one end of the tubes to place the tubes continuously in tension and to allow for end movement of the tubes as the tubes change in effective length during each twisting and untwisting operation.
  • the wires strand together to form a wire unit immediately they pass downstream from the twisting means.
  • the present invention concerns an apparatus for stranding wires which overcomes the above problem.
  • the present invention provides apparatus for stranding a unit of at least two wires together comprising wire guide means extending in a wire pass direction, downstream to a twisting station to define individual feedpaths for wires and prevent the wires from twisting together as they move along the guide means to the twisting station, the guide means being rotatably flexible about a longitudinal axis to provide torsional twist in the guide means and a twisting means in the twisting station and connected to the wire guide means, the twisting means having means to rotate it alternately, in one direction and then the other and for a plurality of revolutions, to rotate the guide means at the twisting station and place torsional twist in the guide means alternately in one direction and then the other about said longitudinal axis; the apparatus also having a stranding means in a stranding station downstream along the feedpaths from the twisting station characterized in that at least a section of the feedpaths for wires is curved and of fixed orientation between the twisting and stranding stations and means extend between the twisting and strand
  • the separation tube is maintained in its curved configuration, then the wires passing through the tube are maintained separate from each other whereby stranding does not take place along the curved section of the feedpaths. Hence, the wires are prevented from stranding together between the twisting station and the stranding station.
  • the separation tube In its fixed position along the curved section of feedpaths, it is desirable to mount the separation tube in a bearing in a support frame through which the tube passes.
  • the frame may lie at any angle to the direction of the tube at the position at which the tube passes through the frame.
  • the separation tube may be formed with two separate passages along its length. However, it may be difficult to rotate the tube about its own axis while maintaining it fixed along the curved section or path if it has a cross-section which has two, passages, because of the stiffness of the material. It is desirable, therefore, that the separation tube has a single passage and feedpath separation means spaced apart along it to separate the passage into the feedpaths at the location of said separation means only.
  • the separation tube is a simple tube construction. It is found that with separation means spaced apart along the tube in this manner, they suffice to maintain the wires separate from each other, i.e. they prevent stranding of the wires from one end of the tube to the other.
  • the feedpath separation means are disposed solely at each end portion of the tube. Hence it is a simple matter to locate the separation means within the end portions.
  • the above apparatus is particularly useful when combined with a plurality of other similar apparatus to form other apparatus for stranding together a plurality of units of wires, each unit comprising at least two wires twisted together.
  • a plurality of twisting means for the different units are spaced apart.
  • Wire separation tubes for the different units curve along their own fixed curved sections of paths and converge to have downstream ends adjacent to one another to present all of the twisted wires in adjacent positions at the stranding station to enable the wire units to be stranded together to form a core unit.
  • Such combined apparatus is described in our patent application Serial No. EP-A-0 104 725.
  • the apparatus shown in the drawings is an apparatus for the manufacture of a cable core unit from 25 pairs of insulated electrical conductors (or wires as referred to in this description).
  • the wires in each pair are stranded together before pairs are themselves combined and bound with binding tape to form the core unit.
  • the core unit may be intended to form a complete cable core, or a core may be made from a plurality of such units.
  • the apparatus comprises a plurality of wire guide means, one for each pair of conductors.
  • Each guide means is in the form of two guide tubes 10, extending one alongside the other, from a tube support plate 12 at their upstream ends to a twisting station at their downstream ends.
  • Each tube is individually rotatably mounted about its own axis by its upstream end within the plate support which is, in turn, spring urged upon parallel guides 14 towards a fixed frame member 16.
  • the tubes are rotationally flexible for the purpose of withstanding rotational forces involved when downstream ends of the tubes are rotated relative to upstream ends and each at its twisting station, around a longitudinal axis located substantially symmetrically between the tubes.
  • the tubes are formed from a material which provides this rotational flexibility and may be made, for instance, from stainless steel or an acetal homopolymer, as sold under the trademark "DELRIN”.
  • each guide means and its method of mounting to the frame member 16 are described in detail in Patent application Serial No. EP-A-0 103 964.
  • a direction changing means 18 is provided for each twisting means (to be described) guide means as shown by Figure 1.
  • This changing means comprises a magnetic switch means which is triggered by an interrupter arm as described in our copending patent application Serial No. EP-A-0 103 962.
  • each changing means 18 is located a short distance from its associated plate support plate support 12.
  • the twenty-five guide means thus included in the apparatus are arranged in specific manner and there are three twisting stations for three groups of the guide means.
  • all of the guide means are located by the frame member 16 and other frame members around three pitch circles which are concentric around a common axis 20 as shown by Figure 1.
  • three guide means are located upon an innermost pitch circle by the positions of their plate supports 12 which are equally spaced around the common axis 20.
  • the tubes of these three guide means extend for approximately 20 metres (65 feet) to the first twisting station 22 at which a twisting means 24 for each of the three guide means is held by a pair of spaced parallel frame members 26, the twisting means being in corresponding positions to the associated plate supports 14 whereby the guide means substantially parallel with the axis 20.
  • One of the three innermost guide means is superposed by another guide means in Figure 1 so that only two, together with their twisting means, are shown.
  • Each twisting means 24, 28, and 36 comprises a cylinder 42 formed with two holes (not shown) within which the downstream ends of the two tubes are secured.
  • Two annular electric clutches 44 and 46 have their driven sides secured to the cylinder 42 for driving it alternately in opposite directions. All clutches 44 and 46 are radially aligned into two groups between the frames of each pair 26, 32 and 38 and the clutches in each group are driven by a common drive belt 48 or 50.
  • the drive belts 48 and 50 at each twisting station are driven continuously, each in one direction, around pulley wheels 52, 54 secured to two drive shafts 56 (which are in line in Figure 1).
  • the drive shafts are driven by a single electric motor 58.
  • each tube 60 Downstream of each twisting means 24, 28, a single tube 60 extends, the tube being secured to its cylinder 42 and extending to a downstream end held by a bearing 62 in a frame 64 lying immediately downstream from the twisting station 34.
  • These tubes 60 are torsionally rigid, i.e. as they rotate with their twisting means, they do not torsionally twist as does each guide means.
  • Each tube 60 is formed from metal or rigid plastic.
  • the tubes 60 pass through central apertures 66 of frames 32 and 38 through which they pass towards frame 64.
  • Each of the guide means and tubes 60 leading to the frame 64, or in the case of the guide means terminating in the twisting means 36, is to be used to enable each of its wires 68 to be given a degree of twist by the twisting means while the tubes prevent the wires from twisting together.
  • the pitch circle for the twisting means 36 is at a diameter only sufficient to allow all of the guide means and twisting means to be passed between and held by the various frames while being suitably drivably connected to the motor 58 without any interference between one twisting means and its guide means and another. Nevertheless, for stranding together twenty-five pairs of wires, the diameter of the outermost pitch circle is approximately 0.5 meters (20 inches). However, it is required that the apparatus should provide a cable core unit 72 from these wires.
  • the apparatus comprises strand prevention means which follow and maintain converging curved paths although they are caused to rotate in alternating directions together with the twisting means.
  • These curved paths direct the twenty-five parallel paths for the wires of the pairs onto a single path which is coincident with the axis 20 at the station 76.
  • each strand prevention means comprises a wire separation tube 78.
  • each tube 60 terminating at frame 64, the paths for the wires of each pair to be stranded are continued by a separation tube 78 which passes through bearings 80 in a support frame 82 and terminates at a support frame 84 which is disposed immediately upstream of the stranding station 74.
  • These tubes 78 are secured to the tubes 60 so as to rotate with them.
  • Wire separation tubes 78 are also secured to and extend from the cylinders 42 of twisting means 36, and these tubes 78 pass through clearance holes (not shown) in the frame 64, which lies close to the cylinders 42, and then proceed through bearings 80 to terminate at frame 84.
  • the tubes converge as they pass through frame 82 to frame 84 and each tube is held upon its curved path by the frames.
  • each tube is required to rotate around its axis which coincides with its fixed curved path section and must have sufficient flexibility to be maintained in this curved configuration while enduring alternating compressive and tensile stresses to give a satisfactory working life.
  • Each tube 78 also has torsional rigidity to prevent it from twisting thereby avoiding build-up and retention of twist.
  • the tubes 78 of this embodiment are formed from an acetal homopolymer, as sold under the trademark "DELRIN”, and have an outside diameter of 5.6 millimetres (0.22 inches) and an inside diameter of 1.9 millimetres (0.075 inches). These tubes pass through the frame 82 to frame 84 at pitch circle diameters which, while decreasing, still maintain the relative positions of the tubes at frame 84.
  • the outermost pitch circle diameter is reduced from around 0.5 metres (20 inches) at frame 64 to approximately 0.2 metres (8 inches) over a distance of approximately 0.5 metres (20 inches) along the axis 20, these tubes satisfactorily withstand the stresses involved.
  • Another suitable material is stainless steel.
  • each hole 86 is formed normal to the frame and an adjustable fitting 88 is located within the hole to provide the desired angle.
  • All the fittings 88 are of similar construction and comprise a substantially cylindrical member 90 having a smooth surface portion 92 for sliding reception within its frame hole 86.
  • One end of the portion 92 terminates in a larger diameter shoulder 94 to engage one side of the frame.
  • the other end of portion 92 extends as a screw thread 96 to accommodate a holding nut 98 to assemble it to the frame.
  • the member 90 has a stepped bore 100 which, as shown, is inclined to the axis of the member and this angle is dependent upon whichever pitch circle position the fitting is used.
  • the fitting 88 is rotatable in each case, within the frame 82 to adjust the inclination of the bore 100 to the desired smoothly curved path of its tube 78, the fitting then being secured in position.
  • each tube 78 is secured by a locking screw 108 within an end 110 of a cylindrical fitting 112.
  • This fitting has a reduced diameter portion 114 having a passage sufficient for two wires 68 issuing from the end of tube 78.
  • This portion 114 is rotatably received within a short metal cylinder 116 extending through a hole 118 formed in frame 84 at the required angle.
  • Each of the separation tubes 78 has two feedpath separation means spaced apart along it to separate the feedpaths for the two wires which are to pass through it.
  • Each of the separation means comprises a pin 120, as shown in Figure 4, which is a diagrammatic view of the whole length of one of the tubes and indicates the positions of the two pins which are disposed at its ends.
  • each of the twisting means is rotated continuously in alternating directions for a preset number of revolutions (e.g. 35 revolutions to each side of an untwisted position of the guide tubes as shown by Figure 1).
  • the downstream end of the associated guide tubes 20 rotate with the twisting means to place torsional twist on the tubes first in one direction and then the other about a longitudinal axis.
  • the alternate rotation of the twisting means is effected by the direction changing means 28 which alternately operates the clutches 44 and 46.
  • the wires 80 are passed through the tubes 20 which prevent the wires from twisting together as the wires move towards the twisting means.
  • the wires pass through the twisting means 36, 38 or 40.
  • the wires for each pair passing through its twisting means 24 and 28 Upon the wires for each pair passing through its twisting means 24 and 28, the wires immediately pass from the two tubes 10 into a respective tube 60. These wires then proceed into their separation tubes 78. In each tube 78, the two wires 68 for each pair are fed one either side of each of the pins 120 which thus prevent the wires from stranding together under the action of the twisting means while in the tube 78. The pins 120 also prevent the wires from stranding together during their movement along the tubes 60. The pins 120 in tubes 78 leading from the twisting means 36, also prevent stranding of the wires in these tubes.
  • the tubes 78 rotate around the curved paths of their axes while leading the wires along converging paths whereby when the wires issue from the tubes 78, the wires immediately strand together to form the pairs, the pairs then being adjacent one another and moving into the cable core unit forming station 76.
  • This station is sufficiently close to the stranding station 74 to preclude any substantial untwisting of the wires of each pair before the pairs come together as the core unit whereupon any unwinding action is resisted by virtue of their frictional contact.
  • the core unit forming station does, in practice, include a device for holding the wire pairs in the form of the core unit.
  • a conventional binding head 122 may be used having a spool 124 of tape which wraps tape 126 around the core unit as it emerges from the head.
  • the above apparatus and according to the invention thus enables a core unit to be formed from pairs of wires which have been stranded together with a rotatable twisting means and a torsionally twistable wire guide means with negligible unwinding of the wires in each pair.
  • the twisting means are also necessarily spaced and if stranding of the pairs were allowed to take place immediately upon exiting from the twisting means, then uncontrollable unwinding would occur before convergence of the stranded pairs at the core unit forming station.
  • this problem is overcome by delaying of the stranding of wires into their pairs until they lie closely adjacent to one another and are positioned for movement directly into the core unit forming station.
  • each guide means in the form of two tubes 10 is replaced by a guide means comprising a single tube defining a single axial passage which provides at least two side-by-side feedpaths for wire.
  • the passage is shaped to prevent wires from moving across the passage to interchange positions by having a narrow passage region in between wider regions which provide the feed paths.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wire Processing (AREA)
  • Ropes Or Cables (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)

Claims (10)

1. Dispositif pour torsader ensemble une unité d'au moins deux fils comprenant un moyen de guide de fil (10) s'étendant dans un sens de passage de fil, en aval d'un poste de retordage (22, 30, 34) pour définir des trajets individuels d'introduction pour fils et éviter que les fils ne soient retordus ensemble alors qu'ils se déplacent le long du moyen de guide jusqu'au poste de retordage; le moyen de guide étant flexible en rotation autour d'un axe longitudinal pour fournir un retordage par torsion dans le moyen de guide et des moyens de retordage (24, 28 et 36) dans le poste de retordage et reliés au moyen de guide de fil, les moyens de retordage comportant des moyens (44, 46, 48, 50, 52, 56, 58) pour le faire tourner en alternance, dans une direction puis dans l'autre pendant une multitude de tours, pour animer d'un mouvement de rotation le moyen de guide au poste de retordage et conférer un retordage par torsion dans le moyen de guide alternativement dans une direction et puis dans l'autre autour de l'axe longitudinal; le dispositif comportant également un moyen de torsadage dans un poste de torsadage (74) en aval des trajets d'introduction par rapport au poste de torsadage, caractérisé en ce qu'au moins une section des trajets d'introduction pour fil est incurvée et d'orientation fixe entre les postes de retordage et de torsadage et des moyens (60, 78) s'étendent entre les postes de retordage et de torsadage pour éviter que les fils, après passage dans le moyen de retordage, ne soient torsadés ensemble avant qu'ils atteignent le poste de torsadage, les moyens empêchant le torsadage comprenant un tube de séparation de fil (78) qui est incurvé de manière à s'étendre le long de la section incurvée fixe du trajet et définit les trajets individuels d'introduction pour les fils, le tube de séparation étant rotatif autour d'un axe de rotation qui coïncide avec la section de trajet incurvée fixe et avec une vitesse et un sens de rotation identiques à ceux du moyen de retordage, et le tube ayant une souplesse permettant le maintien du tube dans sa configuration incurvée le long de la section de trajet incurvée fixe et une rigidité en torsion afin d'éviter l'établissement et la rétention du retordage.
2. Dispositif selon la revendication 1, caractérisé en ce qu'il a au moins un châssis de support de tube de séparation de fil (82, 84) et dans lequel le tube de séparation de fil passe par un support (102, 114, 116) et est monté sur celui-ci à intérieur du châssis pour assurer que le tube suit la section incurvée de trajet avec une orientation fixe.
3. Dispositif selon la revendication 2, caractérisé en ce que le châssis fait un certain angle avec la direction du tube à la position à laquelle le tube traverse le châssis, et le support est incliné suivant l'angle du châssis.
4. Dispositif selon l'une quelconque des revendications 1 et 2, caractérisé en ce que tube de séparation comporte des moyens (120) de séparation de trajet d'introduction espacés le long du tube pour séparer les trajets d'alimentation à l'emplacement des moyens.
5. Dispositif selon l'une quelconque des revendications 1 et 2, caractérisé en ce que le tube de séparation comporte deux moyens (120) de séparation des trajets d'alimentation disposés avec l'un à l'intérieur de chaque partie d'extrémité du tube.
6. Dispositif pour torsader ensemble une multitude d'unités de fils, chaque unité comprenant au moins deux fils retordus ensemble, caractérisé en ce qu'il comprend une multitude de dispositifs selon la revendication 1, avec les moyens de retordage pour les unités différentes étant espacés, les tubes de séparation de fil étant incurvés chacun suivant sa propre section incurvée fixe de trajet avec les trajets convergeant les uns vers les autres et ayant des extrémités aval contiguës les unes aux autres pour positionner tous les fils retordus dans des positions adjacentes alors que les unités sont formées au poste de torsadage pour permettre de torsader ensemble les unités de fils; et
- un poste de formation d'unité d'âme (76) immédiatement en aval du poste de torsadage afin de combiner les unités de fil en une unité d'âme.
7. Dispositif selon la revendication 6, caractérisé en ce que les moyens de retordage sont placés autour d'un axe principal et le moyen de torsadage est situé sur cet axe principal.
8. Dispositif selon la revendication 6, caractérisé en ce qu'il a au moins un châssis de support de tube de séparation (82, 84) disposé entre les postes de retordage et de torsadage et les tubes de séparation de fil passant à travers et sont montés individuellement à l'intérieur du châssis dans des supports (102, 114, 116) pour assurer que les tubes suivent la section incurvée de trajet avec une orientation fixe.
9. Dispositif selon la revendication 6, caractérisé en ce qu'il comporte au moins un châssis (82, 84) de support de tube de séparation disposé entre les postes de retordage et de torsadage dans une position sensiblement perpendiculaire à l'axe principal, et les tubes de séparation de fil traversent et sont montés individuellement à l'intérieur du châssis dans des supports (102, 114, 116) pour assurer que les tubes suivent la section incurvée de trajet avec une orientation fixe.
EP19830304424 1982-08-24 1983-08-01 Appareil pour le tordage mutuel d'au moins deux fils Expired EP0103963B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA409994 1982-08-24
CA000409994A CA1174914A (fr) 1982-08-24 1982-08-24 Toronneuse pour deux fils minimum

Publications (3)

Publication Number Publication Date
EP0103963A2 EP0103963A2 (fr) 1984-03-28
EP0103963A3 EP0103963A3 (en) 1984-08-22
EP0103963B1 true EP0103963B1 (fr) 1987-11-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830304424 Expired EP0103963B1 (fr) 1982-08-24 1983-08-01 Appareil pour le tordage mutuel d'au moins deux fils

Country Status (5)

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EP (1) EP0103963B1 (fr)
JP (1) JPS5954435A (fr)
CA (1) CA1174914A (fr)
DE (1) DE3374361D1 (fr)
FI (1) FI72831C (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI78576C (fi) * 1986-04-01 1989-08-10 Nokia Oy Ab Foerfarande och anordning foer vaexelriktningstvinning.
DE19631770C2 (de) * 1996-08-06 1998-08-27 Gluth Systemtechnik Gmbh Verfahren zum Verdrillen von mindestens zwei Einzelleitungen
WO2004082575A2 (fr) * 2003-03-18 2004-09-30 Bayer Healthcare Ag Diagnostics et traitements contre des maladies associees au phosphodiesterase 6b (pde6b)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732682A (en) * 1971-06-29 1973-05-15 Western Electric Co Methods of and apparatus for twisting and stranding cable pairs in a tandem operation
US3847190A (en) * 1972-12-19 1974-11-12 Phillips Cable Ltd Method and apparatus for twisting wires
US3910022A (en) * 1974-07-18 1975-10-07 Northern Electric Co Apparatus for stranding wires

Also Published As

Publication number Publication date
FI72831B (fi) 1987-03-31
FI833013A (fi) 1984-02-25
DE3374361D1 (en) 1987-12-10
FI72831C (fi) 1987-07-10
CA1174914A (fr) 1984-09-25
EP0103963A3 (en) 1984-08-22
FI833013A0 (fi) 1983-08-23
JPS5954435A (ja) 1984-03-29
EP0103963A2 (fr) 1984-03-28

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