EP2880215B1 - Procede de fabrication par epissurage d'un cable en boucle fermee - Google Patents

Procede de fabrication par epissurage d'un cable en boucle fermee Download PDF

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Publication number
EP2880215B1
EP2880215B1 EP12766117.1A EP12766117A EP2880215B1 EP 2880215 B1 EP2880215 B1 EP 2880215B1 EP 12766117 A EP12766117 A EP 12766117A EP 2880215 B1 EP2880215 B1 EP 2880215B1
Authority
EP
European Patent Office
Prior art keywords
cable
strands
splice
overmolding
center
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.)
Active
Application number
EP12766117.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2880215A1 (fr
Inventor
Benjamin Coutaz
Marc COURTEBRAS
Pierre-François BARON
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.)
ArcelorMittal Wire France SA
Original Assignee
ArcelorMittal Wire France SA
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Filing date
Publication date
Application filed by ArcelorMittal Wire France SA filed Critical ArcelorMittal Wire France SA
Publication of EP2880215A1 publication Critical patent/EP2880215A1/fr
Application granted granted Critical
Publication of EP2880215B1 publication Critical patent/EP2880215B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • D07B7/16—Auxiliary apparatus
    • D07B7/169—Auxiliary apparatus for interconnecting two cable or rope ends, e.g. by splicing or sewing
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B5/00—Making ropes or cables from special materials or of particular form
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/16—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
    • D07B1/165—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics characterised by a plastic or rubber inlay
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0673—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration
    • 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
    • D07B7/16—Auxiliary apparatus
    • D07B7/165—Auxiliary apparatus for making slings
    • 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
    • D07B7/16—Auxiliary apparatus
    • D07B7/18—Auxiliary apparatus for spreading or untwisting ropes or cables into constituent parts for treatment or splicing purposes
    • D07B7/182—Auxiliary apparatus for spreading or untwisting ropes or cables into constituent parts for treatment or splicing purposes for spreading ropes or cables by hand-operated tools for splicing purposes, e.g. needles or spikes
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/10—Rope or cable structures
    • D07B2201/1012—Rope or cable structures characterised by their internal structure
    • D07B2201/102—Rope or cable structures characterised by their internal structure including a core
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2042—Strands characterised by a coating
    • D07B2201/2044—Strands characterised by a coating comprising polymers
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2048—Cores characterised by their cross-sectional shape
    • D07B2201/2049—Cores characterised by their cross-sectional shape having protrusions extending radially functioning as spacer between strands or wires
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2053—Cores characterised by their structure being homogeneous
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2401/00—Aspects related to the problem to be solved or advantage
    • D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
    • D07B2401/205—Avoiding relative movement of components
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2401/00—Aspects related to the problem to be solved or advantage
    • D07B2401/40—Aspects related to the problem to be solved or advantage related to rope making machines
    • D07B2401/403—Reducing vibrations
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2076—Power transmissions

Definitions

  • the present invention relates to a closed-loop cable manufacturing process by splicing, as well as the closed loop thus obtained which is more particularly intended to be integrated in a cable transport installation using tractor or carrier-tractor cables, without however be limited.
  • Such a splice involves closing the cable on itself by rewiring on both sides of the wedding area half of the strands from each of the cable ends thus joined, then making nodes between each of the pairs of strands concurrently, and then insert each of the knotted strands in place of the cable core previously removed locally in the corresponding areas of the splice.
  • splicing zone is understood to mean an area comprising a splice node and the two portions of cables immediately adjacent to this knot, along which the two knotted strands have been retracted in place of the soul of the cable.
  • each of the rollers of the installation will therefore be affected by a series of isolated movements as the geometric irregularity of the splice passes or is periodic oscillation movement, whose frequency may rise, depending on the case, to several tens of Hz, and in some cases even several hundred Hz.
  • vibrations the generation of which is inherent in the splicing of traction cables or tractor-carriers according to the state of the art, can however be found to be of a nature to disturb the environment of this one (for example: generation noise near homes) and / or accelerate the wear or fatigue of some of its components and in particular the cable itself, or components of the device on which the cable loop is used.
  • a method of manufacturing a closed-loop cable, said cable comprising a core and metal strands wound helically around said core, into which is inserted into the splice area a metal strand inside said cable after have locally removed the soul, is known to US 3,934,397 A
  • the purpose of the present invention is therefore to overcome these disadvantages by proposing a splicing process for obtaining a closed loop cable having a splice of a very high geometric regularity, in order to reduce very strongly or even to completely disappear vibrations generated by this area and extend the life of this cable.
  • the subject of the invention is a method of manufacturing a closed-loop cable, said cable comprising a core and metal strands wound helically around said core, in which the two ends of said cable are connected in splice areas in which splice nodes are formed using the ends of the splice each of said strands, which is then inserted inside said cable after having locally removed the core, each splice area is then overmolded with a polymer.
  • Another subject of the invention is a method of manufacturing a closed-loop cable, said cable comprising a core and metal strands wound helically around said core, in which the two ends of said cable are connected in zones of splice in which splice nodes are formed using the ends of each of said strands, which are then inserted inside said cable after locally removing the core and in which the ends of said strands are trimmed by overmolding them with the aid of a polymer, prior to their insertion inside said cable.
  • a closed-loop cable obtainable according to the invention, as well as the use of a closed-loop cable according to the invention as a pure traction cable or as a carrier-tractor cable are envisaged.
  • the closed-loop cable manufacturing method according to the invention can advantageously be used for the splicing of a traction cable comprising a one-piece core carrying a plurality of outer strands consisting of steel wires, these strands being most often six in number, produced according to the patent application No. WO 2013/156689 in the name of the applicant and will be described later, by way of illustration but not limitation, with reference to this application.
  • closed loop an endless loop obtained by splicing an end of a cable on the other end of the same cable, these two ends being brought to one opposite of the other.
  • This term does not cover in particular cables having a terminal loop, such as a sling for example.
  • splicing thus consists in "marrying" the two ends of a cable by replacing in each of them, in the case of an even number of strands, half of the strands of one by strands. the other and vice versa and inserting the end of these strands inside the cable in an area where the soul was removed beforehand, after making a node between each pair of concurrent strands.
  • one of the cable ends will be put back into a higher number of strands than the other, the two numbers of strands replaced in one and the other. other ends corresponding to two consecutive integers framing the value equal to half the number of strands of the cable.
  • the entire splicing operation generally requires about ten operators.
  • the manufacture of a closed loop cable by splicing conventionally begins with the preparation of the two areas of the cable to be patched by ligating each of the ends. This ligation is generally done using metal wires positioned respectively at half the estimated length of the splicing zone, in order to precisely position the "marriage" zone of the two ends of the cable.
  • the person skilled in the art knows how to determine this length depending, in particular, the diameter of the cable. For lifts, the total length of a splice is 1,200 times the nominal cable diameter. Thus, for a 54 mm diameter cable, this is almost 65 m long.
  • the ligatures made it is carried out on one or more cable pitch marriage of the two ends of cable, then we place a mordache on the wedding area to prevent movement of the two cable ends being spliced, the two ligatures are removed, and each cable end is stripped of every second strand by replacing it with the competing strand coming from the other end of the cable, and this until the position chosen by the splicer for the position of each node, this for both ends of the cable, and then straighten the end of each strand on its length to be retracted in place of the soul.
  • Each of the concurrent strands is then knotted to the competing strand from the other end of the cable to form as many splice nodes as there were pairs of concurrent strands. It is important to respect the precise positions chosen in advance in the distribution of these nodes formed over the entire length, each node being generally several meters away from neighboring nodes.
  • each of the ends of the strands is then retracted inside the cable where they come to take the place of the soul which will have been intentionally removed along the portion corresponding cable.
  • a cable 1 made according to the application No. WO 2013/156689 and as represented in figure 1 , it can be seen that it comprises a monobloc core 2 extended by six fins 4 between which are inserted six strands 3.
  • the strands 3 can conventionally be constituted by an assembly of son of different diameters wound helically around a central wire. They are metallic and more particularly preferably steel.
  • the central portion of the cable core may further comprise a strand.
  • This strand can conventionally consist of an assembly of wires of different diameters wound helically around a central wire. It is preferably metallic and more particularly preferably steel.
  • the core of the cable may also comprise fibers, metal or not, inserted longitudinally in the core.
  • the cable 1 has in the end a substantially cylindrical outer surface, in order to minimize the vibrations and noise generated by the running of the cable on the guide rollers and generally on the various winding members of the installation on which it is used.
  • the center-to-center distance of adjacent strands 3 is therefore greater in a cable of this type than in the case of a traction cable or tractor carrier of conventional construction according to the state of the art.
  • the diameter in the current portion of the cable 1 is slightly greater than that of a traction or tractor-carrier cable of conventional construction, which allows once the loop under tension, and contrary to what is possible when making a splice on tractor or tractor carrier cable of conventional construction, to obtain at the nodes performed between two-by-two co-operating strands, a diameter close to or equal to that of the cable under voltage outside the zone. 'splice.
  • one aspect of the invention consists in adding a step of overmolding each splice zone, using a polymer, such as a thermosetting polymer bivariate. component, for example a polyurethane of appropriate grade.
  • a polymer such as a thermosetting polymer bivariate. component, for example a polyurethane of appropriate grade.
  • Another aspect of the invention which will be described in more detail a little further, is to add an overmolding step around each of the strands to return from both sides of the nodes to be executed between strands concurrent two by two.
  • Each aspect of the invention can be implemented separately or in combination, in particular, the overmolding of each of the strands to be returned can be advantageously used during the splicing of the carrier cables or carrier-tractors according to the state of the art.
  • the overmolding of the splice zone may furthermore make it possible, as far as possible, to reconstitute the fins 4 in these zones in order to obtain a substantially cylindrical surface characteristic of this type of product, thereby guaranteeing splice zones in every respect. an external geometry of these zones equivalent or very close to that of the cable in the current part.
  • the splicing zone is partially overmolded, so that the upper part of the strands is not covered by this polymer, which avoids increasing the diameter thereof.
  • the play before overmolding the splice areas, is regularly distributed between adjacent strands in each of the splice areas where each of the two-by-two coiling strands is inserted in place of the core. previously removed once the corresponding node executed.
  • This regular distribution may, for example, be advantageously obtained along each of the aforementioned zones by the insertion at regular intervals and as close as necessary of gambling distribution wedges or bi-throat spacing 5 such that it can be see a represented in figure 2 as well as figure 3 where one can see its insertion between two strands 3.
  • These wedges can be inserted, for example, every 10 to 25 cm.
  • the wedges 5 may further comprise two inclined end faces, taking the form of a trapezium in side view, the short side of which is on the side of the aforementioned double chamfer, of so that each of these wedges forms a dovetail retaining overmoulding splice areas of the invention.
  • wedges are made of a material that is sufficiently hard and resistant in time, for example in less hard metals than the steel of the constituent wires of the cable, or in polymers that may or may not have fillers intended to increase their compressive strength and / or or wear, or to give them lubricating properties.
  • each of the strands to be returned is cut to the necessary length before being fully retracted, so as to come as accurately as possible, once returned to the place of the soul previously removed, in longitudinal contact with the web portion remaining in the cable length adjacent to the re-entry area of interest.
  • it is chosen to cut the strands to return to a slightly shorter length, for example a few millimeters, than the available location to return to the place of the soul previously removed.
  • the small volume thus released at the end of the retracted strand is therefore readily available to be completely filled during the casting of the overmoulding polymer of the corresponding splicing zone, which thus makes it possible to obtain optimum support for strands external to the right of the end of the strand returned to the place of the soul.
  • the step of filling the ends of the strands with respect to the state of the art can be further improved, by placing a specific lining around each of the strands to be returned from and other nodes to be executed between strands concurrent two by two.
  • This specific lining is obtained by overmolding a suitable material around each of these strands. It will be possible to use for this purpose two-component thermosetting polymers, for example polyurethane of suitable grade, the fluidity before setting should be sufficient to easily fill a mold from enclosing the entire length of strand to garnish.
  • the material used for overmoulding must be of final hardness and strength sufficient to withstand the pressure exerted by the strands resting on the overmolded liner, once the splice has been made.
  • the molds used may be in one or more parts. They can thus be made for example in the form of opposite chutes provided with lateral and terminal flanges intended for to secure them, so as to form a mold of single cylindrical internal volume and will preferably define a cylindrical internal volume.
  • the polymeric materials used for these overmoldings may be, for example, two-component thermosetting polymers, such as polyurethanes of suitable grades.
  • vents for casting the polymer in the liquid phase In the upper part of the molds, it will also be possible to use vents for casting the polymer in the liquid phase.
  • the molds may include a heating system for accelerating the setting and solidification of the two-component thermosetting polymers that can be used for the various types of overmolding described above.
  • This heating system can be an integral part of these molds, or consist of a heating system to set up around the molds themselves.
  • the strands to be inserted in place of these will preferably include pins or centering studs of the strand to overmold, so as to ensure the concentricity of overmolding around it.
  • molds for overmolding splice areas they may be lined with a flexible material (for example a polymer of appropriate hardness) for sealing during casting of the overmoulding polymer while contacting each of the outer strands of the cable, so as to slightly emerge them from the overmolding material.
  • a flexible material for example a polymer of appropriate hardness
  • the closed-loop cable according to the invention is more particularly intended to be integrated as a pure traction cable or as a tractor-carrying cable in a person transport system by cables such as a gondola or a cable car.
  • the closed-loop cable according to the invention can be used in many other applications such as an urban transport system, for example, and is therefore not limited to these uses.
  • the method of the present invention makes it possible to perform splices in all respects in accordance with the harmonized standard EN 12927-3 (Safety requirements for cableway installations carrying persons - Cables - Part 3: Splicing of towing cables, carrier-tractors, and 6-strand tow).

Landscapes

  • Ropes Or Cables (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
EP12766117.1A 2012-08-03 2012-08-03 Procede de fabrication par epissurage d'un cable en boucle fermee Active EP2880215B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR2012/000330 WO2014020238A1 (fr) 2012-08-03 2012-08-03 Procede de fabrication par epissurage d'un cable en boucle fermee, câble correspondant et son utilisation

Publications (2)

Publication Number Publication Date
EP2880215A1 EP2880215A1 (fr) 2015-06-10
EP2880215B1 true EP2880215B1 (fr) 2019-11-27

Family

ID=46934615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12766117.1A Active EP2880215B1 (fr) 2012-08-03 2012-08-03 Procede de fabrication par epissurage d'un cable en boucle fermee

Country Status (13)

Country Link
US (1) US10344427B2 (uk)
EP (1) EP2880215B1 (uk)
JP (1) JP2015527506A (uk)
KR (1) KR101536098B1 (uk)
CN (1) CN104662224B (uk)
AU (1) AU2012386851B2 (uk)
BR (1) BR112015002460A2 (uk)
CA (2) CA2950836C (uk)
IN (1) IN2015DN01733A (uk)
MX (1) MX363085B (uk)
RU (1) RU2607756C2 (uk)
UA (1) UA111041C2 (uk)
WO (1) WO2014020238A1 (uk)

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RU2687981C1 (ru) * 2018-09-07 2019-05-17 Общество с ограниченной ответственностью Инженерно-консультационный центр "Мысль" Новочеркасского государственного технического университета Способ счалки каната
JP1656621S (uk) * 2019-08-27 2020-04-06

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Also Published As

Publication number Publication date
BR112015002460A2 (pt) 2018-06-19
UA111041C2 (uk) 2016-03-10
KR20150032349A (ko) 2015-03-25
CA2880834A1 (fr) 2014-02-06
CA2880834C (fr) 2017-01-17
MX363085B (es) 2019-03-07
CN104662224A (zh) 2015-05-27
US20160024710A1 (en) 2016-01-28
CA2950836C (fr) 2019-01-22
CA2950836A1 (fr) 2014-02-06
WO2014020238A1 (fr) 2014-02-06
EP2880215A1 (fr) 2015-06-10
US10344427B2 (en) 2019-07-09
JP2015527506A (ja) 2015-09-17
MX2015001556A (es) 2016-04-04
RU2607756C2 (ru) 2017-01-10
AU2012386851A1 (en) 2015-03-19
AU2012386851B2 (en) 2016-09-15
RU2015107431A (ru) 2016-09-27
IN2015DN01733A (uk) 2015-05-29
CN104662224B (zh) 2017-10-24
KR101536098B1 (ko) 2015-07-10

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