EP0111797B1 - Wire rope with several strand layers - Google Patents

Wire rope with several strand layers Download PDF

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Publication number
EP0111797B1
EP0111797B1 EP83112131A EP83112131A EP0111797B1 EP 0111797 B1 EP0111797 B1 EP 0111797B1 EP 83112131 A EP83112131 A EP 83112131A EP 83112131 A EP83112131 A EP 83112131A EP 0111797 B1 EP0111797 B1 EP 0111797B1
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EP
European Patent Office
Prior art keywords
strands
rope
plastic
outer strands
wire rope
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Expired
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EP83112131A
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German (de)
French (fr)
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EP0111797A1 (en
Inventor
Roland Dipl.-Ing. Verreet
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Drahtseilwerk Saar GmbH
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Drahtseilwerk Saar GmbH
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Application filed by Drahtseilwerk Saar GmbH filed Critical Drahtseilwerk Saar GmbH
Priority to AT83112131T priority Critical patent/ATE20256T1/en
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Classifications

    • 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
    • D07B1/068—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration characterised by the strand design
    • 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
    • D07B5/005—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties
    • 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
    • D07B5/005—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties
    • D07B5/006—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties by the properties of an outer surface polymeric coating
    • 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
    • D07B2201/1016—Rope or cable structures characterised by their internal structure characterised by the use of different strands
    • 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
    • D07B2201/1028—Rope or cable structures characterised by the number of strands
    • D07B2201/1036—Rope or cable structures characterised by the number of strands nine or more strands respectively forming multiple layers
    • 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
    • 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
    • D07B2401/2065—Reducing wear
    • D07B2401/2075—Reducing wear externally

Definitions

  • the invention relates to a wire rope with a plurality of strands.
  • Wire ropes are mainly used when running over rollers, but also on other guides, on drums, etc. Exposed to wear. This applies not only to the outer strand layer, but in the case of multi-layer ropes also to the inner strand layer (s) due to the support of the outer strand layer and the relative movement of the outer strands relative to the rope core comprising the inner strand layer (s) and, if necessary, within the rope core.
  • rope sheaths made of plastic are known, which should cushion the rope and protect the rest from corrosion.
  • Another means of protecting the wire ropes is to let them run over plastic rollers.
  • the plastic rollers very preferably protect the outer strands and especially their outer peripheral sections. This creates a dangerous uncertainty with regard to the timely detection of discard, because wire breaks already occur on the inside while everything is still intact on the outside.
  • the plastic rollers are susceptible to diagonal pull.
  • the invention is based on the object of protecting the outer strand layer of a multi-layer wire rope to a desired extent. Wire breaks in the outer strand layer should be recognizable. Other advantages are mentioned below.
  • the intended purpose is achieved in that, in a wire rope with a plurality of strand layers, at least one quarter and at most three quarters of the outer strands have a plastic sheath which projects beyond the circle of the wire rope circumscribing the other outer strands.
  • the outer strands of the rope are only partially protected by padding, namely the sheathed strands.
  • the other strands are protected to a certain extent by the fact that the encircling circle of the wire rope is surmounted by the sheathing and therefore does not carry them or carries them less.
  • the desired degree of protection of the outer strand layer can be set with the number ratio between the sheathed and the other strands and with the extent to which the sheaths protrude.
  • the uncovered strands allow wire breaks to be recognized by them without any hindrance.
  • the operation of the jackets can be included in the calculation.
  • the service life of the outer strand layer can be influenced in this as well as in that direction by varying the stress over time.
  • unsheathed strands these are also exposed to progressive contact and greater transverse pressures. If the originally covered strands are finally completely exposed on the outside, the stress on the strand layer is similar to that of a rope with normal outer strands. Then wire breaks can also be seen on the originally coated strands. For this reason, too, it is possible to provide for complete abrasion of the plastic coating.
  • The, increased, lifespan of the rope core can, since the lifespan of the outer strand layer can be adapted almost arbitrarily according to the above, can be implemented almost completely in the lifespan of the rope as a whole. With the service life of the outer strand layer, it is only necessary to remain slightly below that of the rope core in order to recognize that it is ready to take off.
  • Annoying scraps occur when the rope is worn compared to the sheathing of an entire rope only small amounts and dimensions of plastic are not present in a strand sheath.
  • the metallic cross-section of the plastic-sheathed outer strands will touch the circumscribed circle or be cut slightly so that the exposed strand continues to bear transverse forces.
  • a slight cutting of the circumscribing circle and protrusion may be necessary for carrying it to compensate for the elastic sinking of the strand into the plastic that is still present on its underside, which is to be expected in each case.
  • their metallic cross section can be kept completely within the circumscribed circle.
  • plastic-coated outer strands As secure and permanent support as possible on the rope core, they can be pressed into the rope cross-section by molding the plastic sheathing on the underside of the strand on the rope core, if necessary also with a slight flattening on the top of the rope.
  • the result of this procedure is particularly advantageous in that the plastic-coated outer strands are pressed into the rope cross-section while the plastic sheathing is thermally deformed on the previously heated rope core and / or the other, previously heated, outer strands.
  • the plastic then deforms exactly where it should and not where it should not: on the underside of the strand, it is pressed into the gaps between the strands due to the heating of the surrounding material, so that this does not happen first happen in the course of use and can loosen the rope structure, rather the strand immediately receives a firm, final bed, and on the unheated upper side the sheath is preserved, as it is.
  • a particularly advantageous embodiment of the invention consists of a Warrington-type rope with thicker and thinner outer strands, in which the smaller outer strands have the plastic sheathing. Because with this construction, the smaller strands mentioned only fill in gaps and have no load-bearing function, the rope structure is stable without them.
  • plastic-coated outer strands will be distributed as evenly as possible over the rope circumference.
  • the drawing shows an embodiment of the invention.
  • An inner strand layer of five strands 2 and an outer strand layer of five larger strands 2 and fifth smaller strands 4 are stranded on a core strand 1 in one operation.
  • the larger strands 3 lie in the grooves between the strands 2 of the inner strand layer.
  • the smaller strands 4 sit on the humps of the strands 2 in the spaces between the strands 3.
  • the strands 4 are provided with an extruded casing 5 made of plastic. They were pressed in during stranding in such a way that the sheathing on the underside of the strands 4 was slightly deformed, i.e. has adapted to the curvature of the strands 2 and has pressed something into the side in the interstices between the strands 2 and the strands 3.
  • the sheathing 5 projects beyond the circumscribing circle 6 of the metallic cable cross section.
  • the protrusion of the jackets 5 over the circumscribing circle 6 is 0.30 mm. In the case of the rope described, it could be changed approximately in a range from 0.10 to 0.50 mm, preferably from 0.20 to 0.40 mm. In the case of ropes of different diameters, these values would increase or decrease in proportion.

Landscapes

  • Ropes Or Cables (AREA)
  • Communication Cables (AREA)
  • Semiconductor Memories (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

1. Wire rope having a plurality of strand plies, characterized in that at least one quarter and at the most three quarters of the outer strands (4) have a plastic sheathing (5), which protrudes beyond the circle (6) of the wire rope circumscribing the other strands (3).

Description

Die Erfindung betrifft ein Drahtseil mit einer Mehrzahl von Litzenlagen.The invention relates to a wire rope with a plurality of strands.

Drahtseile sind hauptsächlich beim Lauf über Rollen, aber auch an anderen Führungen, auf Trommeln u.a.m. Verschleiss ausgesetzt. Das gilt nicht nur für die äussere Litzenlage, sondern im Falle mehrlagiger Seile auch für die innere(n) Litzenlage(n) infolge der Abstützung der äusseren Litzenlage auf und der relativen Bewegung derAussenlitzen gegenüber dem die innere(n) Litzenlage(n) umfassenden Seilkern sowie ggf. innerhalb des Seilkerns.Wire ropes are mainly used when running over rollers, but also on other guides, on drums, etc. Exposed to wear. This applies not only to the outer strand layer, but in the case of multi-layer ropes also to the inner strand layer (s) due to the support of the outer strand layer and the relative movement of the outer strands relative to the rope core comprising the inner strand layer (s) and, if necessary, within the rope core.

Zum Schutz und zur Schonung der Seile bei dieser Beanspruchung sind Seilummantelungen aus Kunststoff bekannt, die das Seil polstern und im übrigen vor Korrosion schützen sollen.To protect and protect the ropes under this stress, rope sheaths made of plastic are known, which should cushion the rope and protect the rest from corrosion.

Diese Seilummantelungen haben sich jedoch nicht bewährt. Sie scheuern sich meist bald durch und hängen dann in Fetzen herum. Dagegen helfen auch Verankerungen der Ummantelung, die z.B. schwalbenschwanzförmig zwischen die Litzen greifen, nur wenig. Wählt man ein dauerhafteres Kunststoffmaterial, wird das Seil zu steif. Auch bleiben die Drahtbrüche verdeckt, an denen man die Ablegereife des Seils erkennt.However, these rope sheaths have not proven themselves. They usually scrub their way through soon and then hang around in pieces. This is also helped by anchoring the sheathing, e.g. Grasp dovetail between the strands, only a little. If you choose a more durable plastic material, the rope becomes too stiff. The broken wires, by which the rope can be discarded, remain hidden.

Als eine Abwandlung der Kunststoffummantelung eines Drahtseils ist aus der DE-OS1 510 073 der Vorschlag bekannt, die erwähnten schwalbenschwanzförmigen Verankerungen zu Buckeln an der Seiloberfläche zu erweitern, die die Auflagedrücke des Seils aufnehmen und weitgehend über die erwähnten Verankerungen nach innen leiten, so dass die Aussenlitzen nicht unmittelbar betroffen werden. Da diese Funktion auf dem in den Zwischenräumen der Aussenlitzen vorhandenen Kunststoff beruht und nicht unbedingt die vollständige Ummantelung des Seils verlangt, können hier auch die Scheitellinien der Aussenlitzen mit dem Seilprofil abschliessen, d.h. ihre obersten Drahtbuckel können freiliegen.As a modification of the plastic sheathing of a wire rope, the proposal is known from DE-OS1 510 073 to expand the dovetail-shaped anchors mentioned to humps on the rope surface, which absorb the contact pressures of the rope and largely guide them inward via the anchors mentioned, so that the Outside strands are not directly affected. Since this function is based on the plastic present in the spaces between the outer strands and does not necessarily require the complete sheathing of the rope, the apex lines of the outer strands can also end here with the rope profile, i.e. their uppermost wire humps can be exposed.

Dieser Gestaltung haften im wesentlichen die gleichen Nachteile an wie der normalen Ummantelung einschliesslich der mangelhaften Erkennbarkeit von Drahtbrüchen. Hinzu kommt eine schwierige Herstellung. Diese Seile konnten sich nicht einführen.This design has essentially the same disadvantages as the normal sheathing, including the poor detectability of wire breaks. There is also a difficult manufacture. These ropes could not be inserted.

Ein weiteres Mittel zur Schonung der Drahtseile ist, sie über Kunststoffrollen laufen zu lassen.Another means of protecting the wire ropes is to let them run over plastic rollers.

Während jedoch die Verankerungen der Ummantelungen in dieser oder jener Form immer auch Kunststoffeinlagerung im Seilinneren bringen und damit dort gleichfalls gewisse verschleissvermindernde Polsterungen erzeugen, schonen die Kunststoffrollen sehr bevorzugt die Aussenlitzen und besonders deren äussere Umfangsabschnitte. Daraus erwächst eine gefährliche Unsicherheit in bezug auf das rechtzeitige Erkennen der Ablegereife, weil im Inneren schon Drahtbrüche auftreten, während aussen noch alles intakt ist. Ausserdem sind die Kunststoffrollen anfällig gegen Schrägzug.However, while the anchoring of the sheathing in this or that form always brings plastic storage inside the rope and thus also creates certain wear-reducing padding, the plastic rollers very preferably protect the outer strands and especially their outer peripheral sections. This creates a dangerous uncertainty with regard to the timely detection of discard, because wire breaks already occur on the inside while everything is still intact on the outside. In addition, the plastic rollers are susceptible to diagonal pull.

Im Normalfall, in dem Drahtseile einfach mit blanken Aussenlitzen auf Stahlrollen laufen, verschleissen die Aussenlitzen meist entschieden eher als der Seilkern und verlangen damit das Ablegen des Seils in einem Zeitpunkt, in dem der Kern durchaus noch brauchbar wäre. Insgesamt betrachtet ist damit die Lebensdauer des Seils unnötig vermindert.In the normal case, in which wire ropes simply run with bare outer strands on steel rollers, the outer strands tend to wear out more quickly than the rope core and therefore require the rope to be removed at a time when the core would still be usable. Overall, the lifespan of the rope is unnecessarily reduced.

Der Erfindung liegt gegenüber diesem Stand der Technik die Aufgabe zugrunde, die äussere Litzenlage eines mehrlagigen Drahtseils in einem gewünschten Ausmass zu schonen. Dabei sollen Drahtbrüche in der äusseren Litzenlage erkennbar sein. Weitere Vorteile sind unten erwähnt.Compared to this prior art, the invention is based on the object of protecting the outer strand layer of a multi-layer wire rope to a desired extent. Wire breaks in the outer strand layer should be recognizable. Other advantages are mentioned below.

Gemäss der Erfindung wird der angestrebte Zweck dadurch erfüllt, dass in einem Drahtseil mit einer Mehrzahl von Litzenlagen mindestens ein viertel und höchstens drei viertel der Aussenlitzen eine Kunststoffummantelung aufweisen, die über den die anderen Aussenlitzen umschreibenden Kreis des Drahtseils hinausragt.According to the invention, the intended purpose is achieved in that, in a wire rope with a plurality of strand layers, at least one quarter and at most three quarters of the outer strands have a plastic sheath which projects beyond the circle of the wire rope circumscribing the other outer strands.

Bei dieser Lösung sind die Aussenlitzen des Seils nur zum Teil durch eine Polsterung geschont, nämlich die ummantelten Litzen. Die anderen Litzen erhalten eine gewisse Schonung dadurch, dass der sie umschreibende Kreis des Drahtseils von den Ummantelungen überragt wird und sie dadurch nicht oder weniger tragen. Das gewünschte Mass der Schonung der äusseren Litzenlage lässt sich einstellen mit dem Zahlenverhältnis zwischen den ummantelten und den anderen Litzen und mit dem Ausmass des Überstehens der Ummantelungen. Die nicht ummantelten Litzen lassen Drahtbrüche an ihnen ohne jede Hinderung erkennen.In this solution, the outer strands of the rope are only partially protected by padding, namely the sheathed strands. The other strands are protected to a certain extent by the fact that the encircling circle of the wire rope is surmounted by the sheathing and therefore does not carry them or carries them less. The desired degree of protection of the outer strand layer can be set with the number ratio between the sheathed and the other strands and with the extent to which the sheaths protrude. The uncovered strands allow wire breaks to be recognized by them without any hindrance.

Darüber hinaus kann man den Betrieb der Ummantelungen in die Rechnung einbeziehen. Man kann höher oder weniger abriebfesten Kunststoff einsetzen, die Ummantelung dicker oder dünner bemessen und die Anzahl der ummantelten Litzen auch unter Berücksichtigung des Abriebs wählen. So lässt sich auch durch zeitlich unterschiedliche Beanspruchung die Lebensdauer der äusseren Litzenlage in dieser wie in jener Richtung beeinflussen. In dem Masse, in dem sich die Ummantelung abnutzt und ihr Überstand über den die anderen, nicht ummantelten Litzen umschreibenden Kreis verringert, sind auch diese fortschreitender Berührung und stärkeren Querpressungen ausgesetzt. Liegen die ursprünglich ummantelten Litzen schliesslich aussen ganz frei, ist die Beanspruchung der Litzenlage ähnlich derjenigen eines Seils mit normalen Aussenlitzen. Dann sind auch an den ursprünglich ummantelten Litzen Drahtbrüche zu erkennen. Auch um dessentwillen kann man vollständigen Abrieb der Kunststoffummantelung vorsehen.In addition, the operation of the jackets can be included in the calculation. You can use higher or less abrasion-resistant plastic, dimension the sheath thicker or thinner and choose the number of sheathed strands taking into account the abrasion. In this way, the service life of the outer strand layer can be influenced in this as well as in that direction by varying the stress over time. To the extent that the sheath wears off and its protrusion decreases beyond the circle circumscribing the other, unsheathed strands, these are also exposed to progressive contact and greater transverse pressures. If the originally covered strands are finally completely exposed on the outside, the stress on the strand layer is similar to that of a rope with normal outer strands. Then wire breaks can also be seen on the originally coated strands. For this reason, too, it is possible to provide for complete abrasion of the plastic coating.

Die zumindest einige Zeit lang stattfindende Aufnahme der Querkräfte hauptsächlich durch die ummantelten Litzen schont ferner den Seilkern, vor allem dadurch, dass diese Querkräfte an der Unterseite der ummantelten Litzen wiederum gespolstert an den Seilkern weitergegeben werden. Die, erhöhte, Lebensdauer des Seilkerns kann, da man nach dem vorstehenden die Lebensdauer der äusseren Litzenlage nahezu beliebig anpassen kann, fast vollständig in Lebensdauer des Seils im ganzen umgesetzt werden. Man braucht mit der Lebensdauer der äusseren Litzenlage nur geringfügig unter der des Seilkerns zu bleiben, um die Ablegereife rechtzeitig zu erkennen.The absorption of the transverse forces, which takes place for at least some time, mainly due to the sheathed strands, also protects the rope core, above all by the fact that these shear forces on the underside of the sheathed strands are in turn passed on in a cushioned manner to the rope core. The, increased, lifespan of the rope core can, since the lifespan of the outer strand layer can be adapted almost arbitrarily according to the above, can be implemented almost completely in the lifespan of the rope as a whole. With the service life of the outer strand layer, it is only necessary to remain slightly below that of the rope core in order to recognize that it is ready to take off.

Störende Fetzen treten beim Verschleiss der im Vergleich zur Ummantelung eines gesamten Seils nur geringfügigen Kunststoffmengen und -abmessungen einer Litzenummantelung nicht auf.Annoying scraps occur when the rope is worn compared to the sheathing of an entire rope only small amounts and dimensions of plastic are not present in a strand sheath.

Jedenfalls dann, wenn vollständiger Abrieb der Litzenummantelungen innerhalb der Lebensdauer des Seils vorgesehen ist, wird man den metallischen Querschnitt der kunststoffummantelten Aussenlitzen den genannten umschreibenden Kreis berühren oder geringfügig schneiden lassen, damit die freigelegte Litze weiterhin Querkräfte mitträgt. Ein geringfügiges Schneiden des umschreibenden Kreises und Überstehen kann für das Mittragen erforderlich sein zum Ausgleich des elastischen Einsinkens der Litze in den an ihrer Unterseite weiterhin vorhandenen Kunststoff, das dabei jeweils zu erwarten ist. Es könnte jedoch auch Gründe geben, die ummantelten Litzen nachher gar nicht mehr tragen zu lassen. Zu diesem Zweck kann man ihren metallischen Querschnitt vollständig innerhalb des genannten umschreibenden Kreises halten.In any case, if there is complete abrasion of the strand sheaths within the life of the rope, the metallic cross-section of the plastic-sheathed outer strands will touch the circumscribed circle or be cut slightly so that the exposed strand continues to bear transverse forces. A slight cutting of the circumscribing circle and protrusion may be necessary for carrying it to compensate for the elastic sinking of the strand into the plastic that is still present on its underside, which is to be expected in each case. However, there could also be reasons why the coated strands can no longer be worn afterwards. For this purpose, their metallic cross section can be kept completely within the circumscribed circle.

Um den kunststoffummantelten Aussenlitzen eine möglichst sichere und dauerhafte Abstützung auf dem Seilkern zu geben, kann man sie unter Anformung der Kunststoffummantelung an der Litzenunterseite an den Seilkern, ggf. ferner unter leichter Abflachung an der Litzenoberseite, in den Seilquerschnitt eindrücken.In order to give the plastic-coated outer strands as secure and permanent support as possible on the rope core, they can be pressed into the rope cross-section by molding the plastic sheathing on the underside of the strand on the rope core, if necessary also with a slight flattening on the top of the rope.

Besonders vorteilhaft ist in dieser Beziehung im Ergebnis die Verfahrensweise, dass die kunststoffummantelten Aussenlitzen unter Wärmeverformung der Kunststoffummantelung an dem, vorher erhitzten, Seilkern und/oderden, vorher erhitzten, anderen Aussenlitzen in den Seilquerschnitt eingedrückt werden. Der Kunststoff verformt sich dann gerade dort, wo er es soll, und dort nicht, wo er es nicht soll: An der Unterseite der Litze drückt er sich infolge der Erwärmung durch das dortige Umgebungsmaterial in die Zwischenräume der Litzen hinein, so dass dies nicht erst im Laufe des Gebrauchs geschehen und die Seilstruktur lockern kann, vielmehr die Litze gleich ein festes, endgültiges Bett erhält, und an der nicht erwärmten Oberseite bleibt die Ummantelung, ziemlich wie sie ist, erhalten.In this respect, the result of this procedure is particularly advantageous in that the plastic-coated outer strands are pressed into the rope cross-section while the plastic sheathing is thermally deformed on the previously heated rope core and / or the other, previously heated, outer strands. The plastic then deforms exactly where it should and not where it should not: on the underside of the strand, it is pressed into the gaps between the strands due to the heating of the surrounding material, so that this does not happen first happen in the course of use and can loosen the rope structure, rather the strand immediately receives a firm, final bed, and on the unheated upper side the sheath is preserved, as it is.

Soweit sich die ummantelten Litzen jedoch erst nach der Verseilung im Lauf der Benutzung tiefer in den Seilquerschnitt eindrücken und sich dadurch - was beim Eindrücken während der Verseilung noch durch ein relatives Zurückhalten dieser Litzen ausgeglichen werden kann - lockern würden, kann man dem dadurch entgegenwirken, dass die kunststoffummantelten Aussenlitzen etwas weniger elastisch als die anderen Aussenlitzen und als der die Litzen unter den Aussenlitzen umfassende Seilkern gewählt sind. Die Lockerung wird dann durch die grössere Dehnfähigkeit der anderen Seilelemente verhindert.As far as the covered strands only press deeper into the rope cross-section after use and thereby loosen - which can be compensated by a relative retention of these strands during the stranding - can be counteracted by the fact that the plastic-coated outer strands are chosen a little less elastic than the other outer strands and as the rope core comprising the strands under the outer strands. The loosening is then prevented by the greater elasticity of the other rope elements.

Für den Normalfall bewegter Seile ist es zu empfehlen, dass jeweils auf den beiden Seiten der kunststoffummantelten Aussenlitzen andere, nicht ummantelte, Litzen verlaufen, weil die Litzen sich dann wegen des weitaus geringeren Reibwerts Kunststoff/ Stahl gegenüber Kunststoff/Kunststoff ungehindert gegeneinandner verschieben können, wie für die Verbiegung des Seils erforderlich.For the normal case of moving ropes, it is recommended that other, uncovered, strands run on both sides of the plastic-coated outer strands, because the strands can then move freely against each other due to the much lower coefficient of friction of plastic / steel compared to plastic / plastic required for bending the rope.

Eine besonders vorteilhafte Ausführungsform der Erfindung besteht in einem Seil von Warrington-Machart mit dickeren und dünneren Aussenlitzen, in dem die kleineren Aussenlitzen die Kunststoffummantelung aufweisen. Denn bei dieser Konstruktion füllen die genannten kleineren Litzen nur Lücken aus und haben keine tragende Funktion, das Seilgefüge ist ohne sie stabil.A particularly advantageous embodiment of the invention consists of a Warrington-type rope with thicker and thinner outer strands, in which the smaller outer strands have the plastic sheathing. Because with this construction, the smaller strands mentioned only fill in gaps and have no load-bearing function, the rope structure is stable without them.

Es versteht sich, dass man die kunststoffummantelten Aussenlitzen möglichst gleichmässig über den Seilumfang verteilen wird.It goes without saying that the plastic-coated outer strands will be distributed as evenly as possible over the rope circumference.

Die Zeichnung gibt ein Ausführungsbeispiel der Erfindung wieder.The drawing shows an embodiment of the invention.

Sie zeigt einen Querschnitt durch ein Warrington-Seil.It shows a cross section through a Warrington rope.

Auf einer Kernlitze 1 sind in einem Arbeitsgang eine innere Litzenlage aus fünf Litzen 2 und eine äussere Litzenlage aus fünf grösseren Litzen 2 und fünft kleineren Litzen 4 verseilt. Die grösseren Litzen 3 liegen in den Rillen zwischen den Litzen 2 der inneren Litzenlage. Die kleineren Litzen 4 sitzen auf den Buckeln der Litzen 2 in den Zwischenräumen zwischen den Litzen 3.An inner strand layer of five strands 2 and an outer strand layer of five larger strands 2 and fifth smaller strands 4 are stranded on a core strand 1 in one operation. The larger strands 3 lie in the grooves between the strands 2 of the inner strand layer. The smaller strands 4 sit on the humps of the strands 2 in the spaces between the strands 3.

Die Litzen 4sind mit einer aufextrudierten Ummantelung 5 aus Kunststoff versehen. Sie sind bei der Verseilung derart eingedrückt worden, dass die Ummantelung an der Unterseite der Litzen 4 etwas verformt worden ist, d.h. sich der Wölbung der Litzen 2 angepasst und seitlich in die Zwickelräume zwischen den Litzen 2 und den Litzen 3 etwas hineingedrückt hat.The strands 4 are provided with an extruded casing 5 made of plastic. They were pressed in during stranding in such a way that the sheathing on the underside of the strands 4 was slightly deformed, i.e. has adapted to the curvature of the strands 2 and has pressed something into the side in the interstices between the strands 2 and the strands 3.

An der Oberseite der Litzen 4 steht die Ummantelung 5 über den umschreibenden Kreis 6 des metallischen Seilquerschnitts über.At the top of the strands 4, the sheathing 5 projects beyond the circumscribing circle 6 of the metallic cable cross section.

Die Litzen sind sämtlich Parallelschlaglitzen. Die Durchmesser betragen:

  • Kernlitze 1: 2,30 mm, Litzen 2: 2,92 mm, Litzen 3: 3,35 mm, Litzen 4 ohne Ummantelung: 2,20 mm, Litzen 4 mit Ummantelung: 2,80 mm, umschreibender Kreis 6: 13,2 mm.
The strands are all parallel lay strands. The diameters are:
  • Core strand 1: 2.30 mm, strand 2: 2.92 mm, strand 3: 3.35 mm, strand 4 without sheathing: 2.20 mm, strand 4 with sheathing: 2.80 mm, circumscribing circle 6: 13, 2 mm.

Der Überstand der Ummantelungen 5 über den umschreibenden Kreis 6 beträgt 0,30 mm. Er könnte bei dem beschriebenen Seil etwa in einem Bereich von 0,10 bis 0,50 mm, vorzugsweise von 0,20 bis 0,40 mm, verändert werden. Bei Seilen anderen Durchmessers würden sich diese Werte etwa verhältnisgleich vergrössern bzw. verkleinern.The protrusion of the jackets 5 over the circumscribing circle 6 is 0.30 mm. In the case of the rope described, it could be changed approximately in a range from 0.10 to 0.50 mm, preferably from 0.20 to 0.40 mm. In the case of ropes of different diameters, these values would increase or decrease in proportion.

Die aus der Zeichnung erkennbare Schonung des Seilinneren durch die Abpolsterung der ummantelten - und die Querkräfte hauptsächlich aufnehmenden - Aussenlitzen an der Unterseite ist von besonderem Vorteil auch bei Normal-Seilen, insbesondere drehungsfreien Seilen, in denen die Aussenlitzen die Litzen der nächstinneren Litzenlage überkreuzen und durch die Polsterung die hohe Flächenpressung an den Überkreuzungen gemildert wird.The protection of the interior of the rope, which can be seen from the drawing, by the padding of the sheathed outer strands on the underside, which absorbs the transverse forces, is of particular advantage also with normal ropes, in particular rotation-free ropes, in which the outer strands cross the strands of the next inner strand layer and through the upholstery the high surface pressure at the crossovers is alleviated.

Claims (8)

1. Wire rope having a plurality of strand plies, characterised in that at least one quarter and at the most three quarters of the outer strands (4) have a plastic sheathing (5), which protrudes beyond the circle (6) of the wire rope circumscribing the other strands (3).
2. Wire rope according to Claim 1, characterised in that the metallic cross section of the plastic-sheathed outer strands (4) touches the said circumscribing circle (6) or projects slightly beyond it.
3. Wire rope according to Claim 1 or 2, characterised in that the plastic-sheathed outer strands (4) are distributed uniformly over the periphery of the rope.
4. Wire rope according to one of Claims 1 to 3, characterised in that on the two sides of the plastic-sheathed outer strands (4) respectively are other outer strands (3), which are not sheathed.
5. Wire rope according to Claim 1, characterised in that in a rope of the Warrington type having thicker (3) and thinner (4) outer strands, the smaller outer strands (4) have the plastic sheathing.
6. Wire rope according to one of Claims 1 to 4, characterised in that the plastic-sheathed outer strands (4) are chosen less elastic than the other outer strands (3) and than the rope core (1, 2) comprising the strands (1, 2) beneath the outer strands.
7. Wire rope according to one of Claims 1 to 6, characterised in that the plastic-sheathed outer strands (4) are pressed into the rope cross section by shaping the plastic sheathing at the bottom surface of the strands at the rope core (1, 2) and also, if necessary, are pressed into the cross section of the rope by slightly flattening the plastic sheathing at the top surface of the strands.
8. Wire rope according to one of Claims 1 to 7, characterised in that the plastic-sheathed outer strands (4) are pressed into the rope cross section by heat deformation of the plastic sheathing (5) on the previously heated rope core (1, 2) and/or the previously heated other outer strands (3).
EP83112131A 1982-12-16 1983-12-02 Wire rope with several strand layers Expired EP0111797B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83112131T ATE20256T1 (en) 1982-12-16 1983-12-02 WIRE ROPE WITH MULTIPLE LAYERS OF STRANDS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823246508 DE3246508A1 (en) 1982-12-16 1982-12-16 WIRE ROPE WITH A MULTIPLE LAYER OF LAYERS
DE3246508 1982-12-16

Publications (2)

Publication Number Publication Date
EP0111797A1 EP0111797A1 (en) 1984-06-27
EP0111797B1 true EP0111797B1 (en) 1986-06-04

Family

ID=6180785

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112131A Expired EP0111797B1 (en) 1982-12-16 1983-12-02 Wire rope with several strand layers

Country Status (5)

Country Link
EP (1) EP0111797B1 (en)
AT (1) ATE20256T1 (en)
DE (1) DE3246508A1 (en)
DK (1) DK163254C (en)
NO (1) NO166593C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110753672A (en) * 2017-06-08 2020-02-04 法尔福达高钢丝绳有限公司 Rope for use as elevator traction rope

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1348033A (en) * 1920-03-17 1920-07-27 George C Moon Wire rope
US2136865A (en) * 1936-10-22 1938-11-15 Malcolm W Reed Wire rope
GB586353A (en) * 1940-06-19 1900-01-01
DE1510073A1 (en) * 1963-04-27 1969-07-31 Alfred Dietz Stranded spiral rope
GB1145014A (en) * 1965-03-22 1969-03-12 Peter Philip Riggs Strand and rope production
US3482034A (en) * 1967-03-07 1969-12-02 Rochester Ropes Inc Conductive tow cable
DE2326742C3 (en) * 1973-05-25 1985-05-30 Drahtseilwerk Saar GmbH, 6654 Kirkel Method for manufacturing a wire rope with an inner strand layer embedded in plastic
ATA203981A (en) * 1981-05-08 1982-10-15 Teufelberger Gmbh MULTILAYER STRAND ROPE IN PARALLEL MACHINE AND METHOD FOR THE PRODUCTION THEREOF

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110753672A (en) * 2017-06-08 2020-02-04 法尔福达高钢丝绳有限公司 Rope for use as elevator traction rope

Also Published As

Publication number Publication date
DK163254B (en) 1992-02-10
NO834232L (en) 1984-06-18
DK163254C (en) 1992-06-29
DE3246508C2 (en) 1989-12-21
NO166593C (en) 1991-09-18
DE3246508A1 (en) 1984-06-20
DK583283D0 (en) 1983-12-16
EP0111797A1 (en) 1984-06-27
DK583283A (en) 1984-06-17
NO166593B (en) 1991-05-06
ATE20256T1 (en) 1986-06-15

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