EP4058390B1 - Cord of an elevator belt having strands formed from filaments having different coating thicknesses - Google Patents
Cord of an elevator belt having strands formed from filaments having different coating thicknesses Download PDFInfo
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- EP4058390B1 EP4058390B1 EP20793652.7A EP20793652A EP4058390B1 EP 4058390 B1 EP4058390 B1 EP 4058390B1 EP 20793652 A EP20793652 A EP 20793652A EP 4058390 B1 EP4058390 B1 EP 4058390B1
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- European Patent Office
- Prior art keywords
- strand
- filaments
- coating
- filament
- elevator belt
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- Revoked
Links
- 238000000576 coating method Methods 0.000 title claims description 43
- 239000011248 coating agent Substances 0.000 title claims description 41
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 28
- 239000011701 zinc Substances 0.000 claims description 28
- 229910052725 zinc Inorganic materials 0.000 claims description 28
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000010276 construction Methods 0.000 claims description 9
- 239000013536 elastomeric material Substances 0.000 claims description 5
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 claims description 2
- 238000005275 alloying Methods 0.000 claims 1
- 239000004411 aluminium Substances 0.000 claims 1
- 239000000470 constituent Substances 0.000 claims 1
- 238000005299 abrasion Methods 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 208000002599 Smear Layer Diseases 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/06—Arrangements of ropes or cables
- B66B7/062—Belts
Definitions
- the invention relates to an elevator belt made of elastomeric material, which has embedded tension or strength members running in the longitudinal direction of the belt, which are designed in the form of cords made of one or more strands, the strands being made up of filaments provided with a coating, which are wrapped around a Filament serving as a strand core is arranged, preferably beaten.
- elevator belts can be designed as flat belts, V-ribbed belts or other profiled belts made of elastomeric material and are provided with tension members or strength members that are embedded within the elastomeric material in the longitudinal direction of the elevator belts and essentially absorb the tensile forces.
- the tension members can be made of different materials, but are usually thin steel cords, which on the one hand are completely enclosed by the elastomeric material and on the other hand are protected from corrosion by a coating. For steel cords, this is usually a relatively thin zinc coating.
- the steel cords usually consist of individual strands wrapped around each other, which in turn consist of several twisted or wrapped filaments.
- the object of the invention was therefore to provide an elevator belt that does not have this tendency to form friction rust, or only to a lesser extent, and thus allows a longer operating time before the so-called discard maturity is reached, i.e. the elevator belt has to be replaced.
- the filament forming the strand core which is called the “king filament” in technical jargon, is provided with a thicker coating than the filaments surrounding the strand core.
- the resulting effect of reduced abrasion appears to be based on a interaction that arises from the fact that the thickened coating can act both as a "smear layer” and as a “sacrificial layer”.
- the thickened coating can act both as a "smear layer” and as a “sacrificial layer”.
- the occurrence of brown fretting rust is avoided or significantly delayed, advantageously and particularly pronounced when the cords are formed from several strands, with an internal central strand consisting of several external strands.
- the filament of the inner central strand that forms the strand core has a thicker coating than the filaments that form the strand cores of the outer strands.
- a further advantageous embodiment is that the coating of the filaments forming the strand cores is at least 10% thicker than the coating of the filaments surrounding the strand cores, preferably more than 30% thicker.
- the coating of the filaments forming the strand cores is at least 10% thicker than the coating of the filaments surrounding the strand cores, preferably more than 30% thicker.
- a further advantageous embodiment is that the cords are designed as steel cords and the coating is a zinc layer. This results in relatively easy-to-produce and inexpensive cord materials that optimally meet the requirements for elevator belts.
- a further advantageous embodiment for such a cord construction is that the zinc layer contains further alloy components, preferably aluminum (Al). This increases the corrosion resistance and further reduces abrasion.
- the elevator belt has cords with filaments in which an iron-zinc alloy is formed between the zinc layer and the filament surface.
- the tension or strength members are designed as steel cords in the form of a 7x7 construction.
- the inner central strand has a filament forming the strand core with a zinc coating of at least 1.5 ⁇ m or in a second variant at least 2.5 ⁇ m, as well as six filaments surrounding the strand core with a zinc coating of at least 1.0 ⁇ m or in a second variant at least 2 .0 ⁇ m.
- the six strands on the outside each have a filament forming the strand core with a zinc coating of at least 1 ⁇ m or in a second variant at least 2.0 ⁇ m and six filaments surrounding the strand core with a zinc coating of at least 0.5 ⁇ m or in a second variant at least 1.0 ⁇ m .
- the second variant/training also serves as an exemplary embodiment, as stated in the Figure 1 is shown.
- the Fig. 1 shows a cord or tension member 1 of an elevator belt.
- the tension member is a steel cord in the form of a 7x7 construction, which means that the cord or tension member 1 has seven strands L1 to L7 each with seven filaments F1 to F7, namely a central strand L1 and six strands surrounding this central strand on the outside L2 to L7. Each strand then has a filament F1 serving as the strand core, the so-called “king filament” which is surrounded by six further filaments F2 to F7.
- the filaments belonging to the central, internal strand L1 are provided with a further index "i" so that the internal strand has the filaments Fi1 to Fi7.
- the filaments of the strands L2 to L7 arranged on the circumference are provided with a further index "a” so that the external strands each have the filaments Fa1 to Fa7.
- the inner central strand L1 has a filament Fi1 forming the strand core with a zinc coating of at least 2.5 ⁇ m, as well as six filaments Fi2 to Fi7 surrounding the strand core with a zinc coating of at least 2.0 ⁇ m.
- the six external strands L2 to L7 each have a filament forming the strand cores Fa1 with a zinc coating of at least 2.0 ⁇ m and six filaments Fa2 to Fa7 surrounding the respective strand core with a zinc coating of at least 1.0 ⁇ m.
- the zinc coating of the respective inner cores Fa1 (of the external strands L2 to L7) corresponds to the zinc coating of the outer filaments Fi2 to Fi7 of the internal strand L1.
Landscapes
- Ropes Or Cables (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Description
Die Erfindung betrifft einen Aufzugsgurt aus elastomerem Material, der eingebettete und in Gurtlängsrichtung verlaufende Zug- oder Festigkeitsträger aufweist, welche in Form von Corden aus ein- oder mehreren Litzen ausgebildet sind, wobei die Litzen aus mit einer Beschichtung versehenen Filamenten aufgebaut sind, die um ein als Litzenseele dienendes Filament angeordnet, vorzugsweise geschlagen sind.The invention relates to an elevator belt made of elastomeric material, which has embedded tension or strength members running in the longitudinal direction of the belt, which are designed in the form of cords made of one or more strands, the strands being made up of filaments provided with a coating, which are wrapped around a Filament serving as a strand core is arranged, preferably beaten.
Seit geraumer Zeit werden in der Aufzugstechnik die vormals ausschließlich verwendeten Stahlseile mehr und mehr durch riemenartige Tragmittel ersetzt, nämlich durch Aufzugsgurte. Solche Aufzugsgurte können als Flachriemen, Keilrippenriemen oder anderweitig profilierte Riemen aus elastomeren Material ausgebildet sein und sind mit Zugträgern bzw. Festigkeitsträgern versehen, die innerhalb des elastomeren Materials in Längsrichtung der Aufzugsgurte eingebettet sind und im Wesentlichen die Zugkräfte auffangen.For some time now, the previously exclusively used steel cables in elevator technology have been increasingly replaced by belt-like suspension devices, namely elevator belts. Such elevator belts can be designed as flat belts, V-ribbed belts or other profiled belts made of elastomeric material and are provided with tension members or strength members that are embedded within the elastomeric material in the longitudinal direction of the elevator belts and essentially absorb the tensile forces.
Die Zugträger können aus unterschiedlichen Materialien bestehen, sind aber in der Regel dünne Stahlcorde, welche einerseits vollständig vom elastomeren Material umschlossen sind und andererseits durch eine Beschichtung vor Korrosion geschützt werden. Bei Stahlcorden ist dies in der Regel eine relativ dünne Zinkbeschichtung.The tension members can be made of different materials, but are usually thin steel cords, which on the one hand are completely enclosed by the elastomeric material and on the other hand are protected from corrosion by a coating. For steel cords, this is usually a relatively thin zinc coating.
Die Stahlcorde bestehen üblicherweise aus einzelnen umeinander geschlagenen Litzen, diese wiederum aus mehreren getwisteten oder umeinander geschlagenen Filamenten.The steel cords usually consist of individual strands wrapped around each other, which in turn consist of several twisted or wrapped filaments.
Während des Betriebs der Aufzugsgurte und während der über Umlenk- und Tragrollen erfolgenden wechselnden Biegungen des Aufzugsgurts, respektive der Stahlcorde unter Last, bewegen sich die einzelnen Filamente relativ zueinander und entsteht Reibung zwischen den einzelnen Filamenten. Der dabeit entstehende Abrieb wird als "Fretting" bezeichnet. Durch diese Reibung der einzelnen Filamente aneinander kann die relativ dünne Beschichtung der Filamente, bei Stahlcorden bzw. Stahlfilamenten die Zinkbeschichtung abgerieben werden. Die danach bei verzinkten Stahlcorden einsetzende Reibung von Stahl auf Stahl erzeugt einen so genannten "Reibrost". Dieser ist unerwünscht und behindert den einwandfreien Betrieb eines Aufzugs.During operation of the elevator belts and during the changing bends of the elevator belt or the steel cords that occur over deflection and support rollers Load, the individual filaments move relative to each other and friction occurs between the individual filaments. The resulting abrasion is referred to as “fretting”. This friction of the individual filaments against one another can cause the relatively thin coating of the filaments, or the zinc coating in the case of steel cords or steel filaments, to be rubbed off. The steel-on-steel friction that then sets in with galvanized steel cords creates what is known as “friction rust”. This is undesirable and hinders the proper operation of an elevator.
Dokument
Für die Erfindung bestand daher die Aufgabe, einen Aufzugsgurt bereitzustellen, der diese Neigung zur Bildung von Reibrost nicht oder nur in geringerem Maße aufweist und somit eine längere Betriebszeit erlaubt, bevor die so genannte Ablegereife erreicht ist, d.h. der Aufzugsgurt ausgetauscht werden muss.The object of the invention was therefore to provide an elevator belt that does not have this tendency to form friction rust, or only to a lesser extent, and thus allows a longer operating time before the so-called discard maturity is reached, i.e. the elevator belt has to be replaced.
Gelöst wird diese Aufgabe durch die Merkmale des Hauptanspruchs. Weitere vorteilhafte Ausbildungen sind in den Unteransprüchen offenbart.This task is solved by the features of the main claim. Further advantageous trainings are disclosed in the subclaims.
Dabei ist das die Litzenseele bildende Filament, das im Fachjargon "King-Filament" genannt wird, mit einer dickeren Beschichtung versehen, als die die Litzenseele umgebenden Filamente. Durch Untersuchungen und Prüfstandsläufe konnte man überraschenderweise feststellen, dass der Abrieb durch Fretting bereits dann minimiert wurde, wenn in der erfindungsgemäßen Art und Weise die Litzenseelen und die umgebenden Litzen mit unterschiedlichen Schichtdicken versehen sind. Dies ist nicht nur bei den innen liegenden Litzen der Corde der Fall, sondern durchaus auch bei den außen liegenden Litzen, was im Vorfeld der Versuche nicht auf der Hand lag.The filament forming the strand core, which is called the “king filament” in technical jargon, is provided with a thicker coating than the filaments surrounding the strand core. Through investigations and test bench runs, it was surprisingly found that abrasion caused by fretting was already minimized when the strand cores and the surrounding strands were provided with different layer thicknesses in the manner according to the invention. This is not only the case with the internal strands of the cord, but also with the external strands, which was not obvious before the tests.
Der hier entstehende Effekt des verringerten Abriebs scheint auf einem Zusammenwirken zu beruhen, welches daraus entsteht, dass die verdickte Beschichtung sowohl als "Schmierschicht" als auch als "Opferschicht" wirken kann. In jedem Fall wird bei Zinkbeschichtungen das Auftreten von braunem Reibrost vermieden bzw. deutlich verzögert, vorteilhafterweise und besonders ausgeprägt dann, wenn die Corde aus mehreren Litzen ausgebildet sind, wobei eine innenliegende zentrale Litze von mehreren außen liegenden Litzen umgeben ist.The resulting effect of reduced abrasion appears to be based on a interaction that arises from the fact that the thickened coating can act both as a "smear layer" and as a "sacrificial layer". In any case, with zinc coatings the occurrence of brown fretting rust is avoided or significantly delayed, advantageously and particularly pronounced when the cords are formed from several strands, with an internal central strand consisting of several external strands.
Eine vorteilhafte Weiterbildung besteht darin, dass das die Litzenseele bildenden Filament der innenliegenden zentralen Litze eine dickere Beschichtung aufweist, als die die Litzenseelen der äußeren Litzen bildenden Filamente. Auch hier ergaben Versuche, dass der Abrieb durch eine solche Maßnahme weiter verringert werden kann und die Haltbarkeit bzw. Lebensdauer des Aufzugsgurts weiter erhöht wird.An advantageous development is that the filament of the inner central strand that forms the strand core has a thicker coating than the filaments that form the strand cores of the outer strands. Here too, tests showed that abrasion can be further reduced by such a measure and the durability or service life of the elevator belt is further increased.
Eine weitere vorteilhafte Ausbildung besteht darin, dass die Beschichtung der die Litzenseelen bildenden Filamente um mindestens 10% dicker ist als die Beschichtung der die Litzenseelen umgebenden Filamente, vorzugsweise um mehr als 30% dicker ist. Einerseits sind solche Unterschiede verfahrenstechnisch durchaus herstellbar. Andererseits ist eine Begrenzung im Hinblick auf ökonomische Betrachtung dadurch gewährleistet.A further advantageous embodiment is that the coating of the filaments forming the strand cores is at least 10% thicker than the coating of the filaments surrounding the strand cores, preferably more than 30% thicker. On the one hand, such differences can certainly be achieved in terms of process engineering. On the other hand, this ensures a limitation with regard to economic considerations.
Gleiches gilt für eine weitere vorteilhafte Ausbildung, die darin besteht, dass die Beschichtung der die Litzenseelen bildenden Filamente im Mittel dicker ist als 2µm. Die Angabe "im Mittel dicker" scheint nur vordergründig ungenau zu sein, ist aber in praxi erforderlich, um Besonderheiten unterschiedlicher Beschichtungsverfahren zu berücksichtigen, bei denen geringe Abweichungen über die gesamte Fläche bzw. Länge der Filamente möglich und verfahrensimmanent sind. So erfolgt beispielsweise bei der Zinkbeschichtung von Stahlfilamenten eine Reihe von Messungen über die Länge eines Filaments, mit denen dann eine Mittelwertbestimmung erfolgt. Das trägt der Tatsache Rechnung, dass bei der Beschichtung solcher Elemente einerseits eine Optimierung im Hinblick auf eine möglichst geringe Menge an Beschichtungsmaterial angestrebt wird, andererseits aber eine Mindestschichtdicke nicht unterschritten werden soll.The same applies to a further advantageous embodiment, which consists in the coating of the filaments forming the strand cores being thicker on average than 2 μm. The statement "on average thicker" only appears to be superficially inaccurate, but in practice it is necessary to take into account the special features of different coating processes in which small deviations over the entire surface or length of the filaments are possible and are inherent to the process. For example, when zinc coating steel filaments, a series of measurements are carried out over the length of a filament, which are then used to determine the average value. This takes into account the fact that when coating such elements, on the one hand, the aim is to optimize with regard to the smallest possible amount of coating material, but on the other hand, a minimum layer thickness should not be fallen short of.
Für einen großen Teil der Anwendungsfälle besteht eine weitere vorteilhafte Ausbildung besteht darin, dass die Corde als Stahlcorde ausgebildet sind und die Beschichtung eine Zinkschicht ist. Damit erhält man relativ einfach herstellbare und preiswerte Cordmaterialien, die den Ansprüchen für Aufzugsgurte in allerbester Weise genügen.For a large part of the applications, a further advantageous embodiment is that the cords are designed as steel cords and the coating is a zinc layer. This results in relatively easy-to-produce and inexpensive cord materials that optimally meet the requirements for elevator belts.
Eine weitere vorteilhafte Ausbildung für eine solche Cordkonstruktion besteht darin, dass die Zinkschicht weitere Legierungsbestandteile enthält, vorzugsweise Aluminium (Al). Hierdurch wird die Korrosionsfestigkeit erhöht und der Abrieb weiter erniedrigt. Gleiches gilt für eine vorteilhafte Ausführung, bei der der Aufzugsgurt Corde mit Filamenten aufweist, bei denen zwischen der Zinkschicht und der Filamentoberfläche eine Eisen-Zink-Legierung ausgebildet ist.A further advantageous embodiment for such a cord construction is that the zinc layer contains further alloy components, preferably aluminum (Al). This increases the corrosion resistance and further reduces abrasion. The same applies to an advantageous embodiment in which the elevator belt has cords with filaments in which an iron-zinc alloy is formed between the zinc layer and the filament surface.
Eine weitere vorteilhafte Ausbildung eines Aufzugsgurts besteht darin, dass die Zug- oder Festigkeitsträger als Stahlcorde in Form einer 7x7-Konstruktion ausgebildet sind. Die innenliegende zentrale Litze weist ein die Litzenseele bildendes Filament mit einer Zinkbeschichtung von mindestens 1,5µm oder in eine zweiten Variante mindestens 2,5µm auf, sowie sechs die Litzenseele umgebende Filamente mit einer Zinkbeschichtung von mindestens 1,0µm oder in eine zweiten Variante mindestens 2,0µm. Die außen liegenden sechs Litzen jeweils ein die Litzenseele bildendes Filament mit einer Zinkbeschichtung von mindestens 1µm oder in eine zweiten Variante mindestens 2,0µm sowie sechs die Litzenseele umgebende Filamente mit einer Zinkbeschichtung von mindestens 0,5µm oder in eine zweiten Variante mindestens 1,0µm aufweisen.Another advantageous design of an elevator belt is that the tension or strength members are designed as steel cords in the form of a 7x7 construction. The inner central strand has a filament forming the strand core with a zinc coating of at least 1.5µm or in a second variant at least 2.5µm, as well as six filaments surrounding the strand core with a zinc coating of at least 1.0µm or in a second variant at least 2 .0µm. The six strands on the outside each have a filament forming the strand core with a zinc coating of at least 1µm or in a second variant at least 2.0µm and six filaments surrounding the strand core with a zinc coating of at least 0.5µm or in a second variant at least 1.0µm .
Welche der beiden Varianten die bessere für den jeweiligen Anwendungsfall ist, hängt u.a. ab vom Längengewicht der Zugträger/Corde, d.h. vom Längengewicht des Aufzugsgurts, wie es in der Auslegung der Aufzugskonstruktion vorgesehen ist.Which of the two variants is better for the respective application depends, among other things, on the length weight of the tension members/cords, i.e. on the length weight of the elevator belt, as provided for in the design of the elevator construction.
Neben weiteren möglichen und typischen Konstruktionen dient die zweite Variante/ Ausbildung auch als Ausführungsbeispiel, wie es in der
Die
Zur besseren Übersicht sind dabei die zu der zentralen, innenliegendem Litze L1 gehörigen Filamente mit einem weiteren Index "i" versehen so dass die innenliegende Litze die Filamente Fi1 bis Fi7 aufweist. Entsprechend sind die Filamente der am Umfang angeordneten Litzen L2 bis L7 mit einem weiteren Index "a" versehen so dass die außen liegenden Litzen jeweils die Filamente Fa1 bis Fa7 aufweisen.For a better overview, the filaments belonging to the central, internal strand L1 are provided with a further index "i" so that the internal strand has the filaments Fi1 to Fi7. Correspondingly, the filaments of the strands L2 to L7 arranged on the circumference are provided with a further index "a" so that the external strands each have the filaments Fa1 to Fa7.
Die innenliegende zentrale Litze L1 weist ein die Litzenseele bildendes Filament Fi1 mit einer Zinkbeschichtung von mindestens 2,5µm auf, sowie sechs die Litzenseele umgebende Filamente Fi2 bis Fi7 mit einer Zinkbeschichtung von mindestens 2,0µm. Die außen liegenden sechs Litzen L2 bis L7 weisen jeweils ein die Litzenseelen Fa1 bildende Filamente mit einer Zinkbeschichtung von mindestens 2,0µm sowie sechs die jeweilige Litzenseele umgebenden Filamente Fa2 bis Fa7 mit einer Zinkbeschichtung von mindestens 1,0µm aufweisen. Somit entspricht in diesem Fall die Zinkbeschichtung der jeweiligen Innenseelen Fa1 (der außen liegenden Litzen L2 bis L7) der Zinkbeschichtung der äußeren Filamente Fi2 bis Fi7 der innen liegenden Litze L1.The inner central strand L1 has a filament Fi1 forming the strand core with a zinc coating of at least 2.5µm, as well as six filaments Fi2 to Fi7 surrounding the strand core with a zinc coating of at least 2.0µm. The six external strands L2 to L7 each have a filament forming the strand cores Fa1 with a zinc coating of at least 2.0 μm and six filaments Fa2 to Fa7 surrounding the respective strand core with a zinc coating of at least 1.0 μm. In this case, the zinc coating of the respective inner cores Fa1 (of the external strands L2 to L7) corresponds to the zinc coating of the outer filaments Fi2 to Fi7 of the internal strand L1.
Natürlich können auch andere gängige Cordkonstruktionen in der erfindungsgemäßen Art ausgebildet werden, beispielsweise Konstruktionen des Typs 7x19, 19+8x7 oder ähnliche.Of course, other common cord constructions can also be designed in the manner according to the invention, for example constructions of the 7x19, 19+8x7 type or similar.
- 11
- CordCord
- Fa1Fa1
- Filament / King-Filament (Außenlitze)Filament / King filament (outer strand)
- Fa2Fa2
- Filament (Außenlitze)Filament (outer strand)
- Fa3Fa3
- Filament (Außenlitze)Filament (outer strand)
- Fa4Fa4
- Filament (Außenlitze)Filament (outer strand)
- Fa5Fa5
- Filament (Außenlitze)Filament (outer strand)
- Fa6Fa6
- Filament (Außenlitze)Filament (outer strand)
- Fa7Fa7
- Filament (Außenlitze)Filament (outer strand)
- L1L1
- zentrale Litzecentral strand
- L2L2
- Außenlitzeouter strand
- L3L3
- Außenlitzeouter strand
- L4L4
- Außenlitzeouter strand
- L5L5
- Außenlitzeouter strand
- L6L6
- Außenlitzeouter strand
- L7L7
- Außenlitzeouter strand
- Fi1Fi1
- Filament / King-Filament (zentrale Litze)Filament / King filament (central strand)
- Fi2Fi2
- Filament (zentrale Litze)Filament (central strand)
- Fi3Fi3
- Filament (zentrale Litze)Filament (central strand)
- Fi4Fi4
- Filament (zentrale Litze)Filament (central strand)
- Fi5Fi5
- Filament (zentrale Litze)Filament (central strand)
- Fi6Fi6
- Filament (zentrale Litze)Filament (central strand)
- Fi7Fi7
- Filament (zentrale Litze)Filament (central strand)
Claims (10)
- Elevator belt made of elastomeric material comprising embedded tensile or strength members running in the belt longitudinal direction which are formed as cords (1) from one or more strands (L1-L7), wherein the strands are constructed from filaments (Fi1-Fi7; Fa1-Fa7) provided with a coating which are arranged, preferably wrapped, around a filament (Fi1; Fa1) serving as a strand core, characterized in that the filament forming the strand core is provided with a thicker coating than the filaments surrounding the strand core (Fi2-Fi7; Fa2-Fa7).
- Elevator belt according to Claim 1, wherein the cords are formed from two or more strands, wherein an inner central strand (L1) is surrounded by two or more outer strands (L2-L7).
- Elevator belt according to Claim 2, wherein the strand core-forming filament (Fi1) of the inner central strand (L1) has a thicker coating than the filaments (Fa1) forming the strand cores of the outer strands (L2-L7).
- Elevator belt according to any of Claims 1 to 3, wherein the coating of the filaments (Fi1, Fa1) forming the strand cores is at least 10% thicker than the coating of the filaments (Fi2-Fi7; Fa2-Fa7) surrounding the strand cores, preferably more than 30% thicker.
- Elevator belt according to Claim 4, wherein the coating of the filaments forming the strand cores is on average thicker than 2 µm.
- Elevator belt according to any of Claims 1 to 5, wherein the cords are in the form of steel cords and the coating is a zinc layer.
- Elevator belt according to Claim 6, wherein the zinc layer contains further alloying constituents, preferably aluminium (Al).
- Elevator belt according to Claim 6 or 7, wherein an iron-zinc alloy is formed between the zinc layer and the filament surface.
- Elevator belt according to any of Claims 6 to 8, wherein the tensile or strength members are formed as steel cords in a 7x7 construction, wherein the inner central strand comprises a filament forming the strand core having a zinc coating of at least 1.5 µm and six filaments surrounding the strand core having a zinc coating of at least 1 µm while the outer six strands each comprise a filament forming the strand core having a zinc coating of at least 1 µm and six filaments surrounding the strand core having a zinc coating of at least 0.5 µm.
- Elevator belt according to any of Claims 6 to 8, wherein the tensile or strength members are formed as steel cords in a 7x7 construction, wherein the inner central strand comprises a filament forming the strand core having a zinc coating of at least 2.5 µm and six filaments surrounding the strand core having a zinc coating of at least 2.0 µm while the outer six strands each comprise a filament forming the strand core having a zinc coating of at least 2.0 µm and six filaments surrounding the strand core having a zinc coating of at least 1.0 µm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019217625.9A DE102019217625A1 (en) | 2019-11-15 | 2019-11-15 | Elevator belt with cords made of coated strands |
| PCT/EP2020/079350 WO2021094059A1 (en) | 2019-11-15 | 2020-10-19 | Cord of an elevator belt having strands formed from filaments having different coating thicknesses |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4058390A1 EP4058390A1 (en) | 2022-09-21 |
| EP4058390B1 true EP4058390B1 (en) | 2023-09-13 |
Family
ID=72964695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20793652.7A Revoked EP4058390B1 (en) | 2019-11-15 | 2020-10-19 | Cord of an elevator belt having strands formed from filaments having different coating thicknesses |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4058390B1 (en) |
| CN (1) | CN114728764B (en) |
| DE (1) | DE102019217625A1 (en) |
| WO (1) | WO2021094059A1 (en) |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3330909A1 (en) * | 1983-08-24 | 1985-03-07 | Siemens AG, 1000 Berlin und 8000 München | Method for producing a flexible electrical lead |
| DE3336616A1 (en) * | 1983-10-05 | 1985-04-25 | Siemens AG, 1000 Berlin und 8000 München | Drum-windable, flexible electrical cable having strand elements stranded in layers |
| EA001727B1 (en) * | 1997-05-15 | 2001-08-27 | Пирелли Кави Э Системи С.П.А. | Cable with impact-resistant coating |
| BR0110652B1 (en) * | 2000-05-08 | 2010-10-05 | A steel cord adapted for reinforcing thermoplastic elastomers and composite comprising a thermoplastic elastomer as a matrix material. | |
| JP3660259B2 (en) * | 2001-03-19 | 2005-06-15 | 東京製綱株式会社 | Wire rope |
| JP3910377B2 (en) * | 2001-04-25 | 2007-04-25 | 東京製綱株式会社 | Wire rope |
| CN100393937C (en) * | 2001-09-12 | 2008-06-11 | 株式会社日立制作所 | Rope |
| DE602004022188D1 (en) * | 2003-11-03 | 2009-09-03 | Bekaert Sa Nv | Fine steel cord with low structural tension |
| CN101122097B (en) * | 2006-08-11 | 2011-11-16 | 因温特奥股份公司 | Belt for a lift facility and lift facility with a such belt |
| NZ556751A (en) * | 2006-08-11 | 2009-03-31 | Inventio Ag | Belt for an elevator system and method of manufacturing such a belt |
| CN103108824B (en) * | 2010-08-13 | 2015-11-25 | 奥的斯电梯公司 | There is supporting member and the method thereof of protectiveness coating |
| CN104575705A (en) * | 2013-10-12 | 2015-04-29 | 宁夏海洋线缆有限公司 | High-conductivity cable |
| CN105448420A (en) * | 2014-09-26 | 2016-03-30 | 江苏东强股份有限公司 | High frequency data cable of 1200 MHz |
| CN204760078U (en) * | 2015-06-24 | 2015-11-11 | 上海谦恒电气有限公司 | Ribbon cable convenient to high -speed promotion |
| EP3142127B1 (en) * | 2015-09-11 | 2017-08-30 | MD Elektronik GmbH | Electrical cable with drain wire |
| DE102015219235A1 (en) * | 2015-10-06 | 2017-04-06 | Contitech Antriebssysteme Gmbh | V-ribbed belts |
| CN105655038B (en) * | 2016-04-08 | 2017-06-16 | 长城电缆有限公司 | A kind of fireproof cable and its production technology |
| WO2018015173A1 (en) * | 2016-07-19 | 2018-01-25 | Bekaert Advanced Cords Aalter Nv | An evelator tension member with a hard thermoplastic polyurethane elastomer jacket |
| CN106057306A (en) * | 2016-08-17 | 2016-10-26 | 上海新时达线缆科技有限公司 | Cable used for elevator |
| CN209456788U (en) * | 2018-12-28 | 2019-10-01 | 五合兴华通讯设备有限公司 | A kind of weather-proof anti-corrosion type insulation steel twisted wire |
-
2019
- 2019-11-15 DE DE102019217625.9A patent/DE102019217625A1/en active Pending
-
2020
- 2020-10-19 EP EP20793652.7A patent/EP4058390B1/en not_active Revoked
- 2020-10-19 CN CN202080078595.6A patent/CN114728764B/en active Active
- 2020-10-19 WO PCT/EP2020/079350 patent/WO2021094059A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021094059A1 (en) | 2021-05-20 |
| DE102019217625A1 (en) | 2021-05-20 |
| EP4058390A1 (en) | 2022-09-21 |
| CN114728764A (en) | 2022-07-08 |
| CN114728764B (en) | 2024-03-12 |
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