DE102017130743A1 - Elevator rope and method of making an elevator rope - Google Patents

Abstract

An elevator cable (1) has a cable insert (3) and a plurality of outer strands (2) looped around the cable insert (3), wherein the cable insert (3) has an insert core (6) sheathed by steel strands (5), wherein between the cable insert ( 3) and the outer strands (3) an intermediate layer (4) of at least one meltable material is arranged. Furthermore, a method for producing an elevator rope (1) is described.

Description

The present invention relates to an elevator rope according to the preamble of claim 1 and to a method for producing such an elevator rope.

Generic elevator ropes are for example from the DE 10 2011 053 202 A1 or the DE 20 2013 102 914 U1 known.

Such elevator ropes usually consist of a plurality of stranded steel wire strands as outer strands and a cable insert, which also partially consists of one or more such steel wire strands or a fiber bundle of natural or synthetic fibers.

The demands on the physical properties of such elevator ropes have been due to the increasing construction and driving heights, high levels of utilization, modern system designs, etc. in recent years. Noticeably increased.

At the same time, the operating point of modern elevator ropes has been moved further into the lower load range of such elevator ropes by reducing the size and mass of static loads to be carried by such elevator ropes, such as cabins or cabin panels of elevators, as well as dynamic loads such as drive and rotating parts.

Important characteristics of such elevator ropes are, in addition to the cable minimum breaking force, the rope life or bending fatigue capacity as well as the elastic behavior of such ropes under load.

The rope elasticity is directly related to the lowering of an elevator car under load and thus has a significant influence on the behavior and the power consumption of the elevator system.

This is also accompanied by an influence of the rope elasticity on the setting of a level control, their energy requirement for multiple starts of the drive, the service life and the wear of the drive components.

The rope elasticity also has an effect on the subjective perception of a passenger such as car movement during loading and unloading, descending the car and the offset of elevator shaft and cabin.

With regard to their elongation, such elevator ropes have pronounced nonlinear behavior as a function of the applied cable pull force, with the cable expanding more than the higher load ranges at the same load increment, in particular in the low load range.

In addition, ropes have cyclic loading in the course of the installation commissioning of the elevator system due to the nature of a setting behavior, which is mainly due to contact finding and leveling of adjacent wires in the steel wire strands.

Because of this setting behavior, the elevator rope also has an increased elongation and thus a lower modulus of elasticity.

The two phenomena described above currently limit the headroom of elevator installations.

Object of the present invention is to provide a generic elevator rope with less rope elongation and thus higher modulus of elasticity, and to provide a method for producing such a hoisting rope.

This object is achieved by an elevator rope having the features of claim 1 and by a method for producing such an elevator rope having the features of claim 6.

The elevator cable according to the invention has a cable insert and a plurality of outer strands looped around the cable insert, wherein the cable insert has an insert core encased in steel strands.

Between the cable insert and the outer strands an intermediate layer of at least one meltable material is provided.

Through the intermediate layer between the cable insert and the outer strands an elevator rope is provided in which a previously described contact finding or contact closure between individual wires and strands in the rope no longer takes place, since there is already through the intermediate layer a closed contact between the wires and strands in the rope ,

As a result, the setting behavior of such a lift rope is drastically minimized.

In addition, such an elevator rope is characterized by a low rope elongation already in the first load cycles and a correspondingly high modulus of elasticity.

The linearity between rope elongation and cable pull force is significantly increased with such an elevator rope according to the invention.

In addition, readjustment of a level control of an elevator car suspended on such an elevator rope can be drastically minimized or even avoided, thereby providing improvements particularly in terms of power consumption of the elevator system, wear of drive components of the elevator system elevator system, and saving of investment costs can be achieved.

The subjective perceptions of the passenger with regard to system comfort are also significantly improved by the use of such an elevator cable according to the invention.

Advantageous embodiments of the invention are the subject of the dependent claims.

According to an advantageous embodiment variant, the intermediate layer consists of one or more thermoplastic materials, in particular PVC, PE, PP, PA, ABS, PC, PUR, PET.

Such thermoplastic materials can be introduced in a simple manner between cable system and outer strands of the elevator rope, in particular extrudable.

The insert core of the elevator rope is designed according to a preferred embodiment variant as a natural or plastic fiber core or steel strand.

According to a further advantageous embodiment, the intermediate layer covers mutually facing lateral surfaces of the steel strands of the cable insert and the outer strands, in particular in the case of a stranded with steel strands insert core, consisting of a natural or plastic fiber core.

According to a further embodiment, the intermediate layer envelops the outer surface of the steel strands of the cable insert completely, which further improves the contact finding and contact closure between the individual wires and strands in the elevator rope and further favors the associated beneficial effects.

In the method according to the invention for producing an elevator rope, a plurality of steel wires and / or natural or synthetic fibers are stranded into an insert core to form a cable insert.

The insert core is stranded with steel strands and outer strands are beaten around the rope insert thus finished.

After stranding the cable insert, an intermediate layer of at least one meltable material is applied to the cable insert before or during the stranding of the cable insert with the outer strands.

Hereinafter, advantageous embodiments of an elevator rope according to the invention will be described in more detail with reference to the accompanying drawings.

• 1 eine schematische Querschnittsansicht einer ersten Ausführungsvariante eines Aufzugseils mit einem aus Natur- oder Kunststofffasern gefertigten Einlagekern,
• 2 und 3 weitere Ausführungsvarianten eines Aufzugseils mit aus Stahllitzen gefertigtem Einlagekern und die Stahllitzen der Seileinlage vollständig umhüllenden Zwischenschicht.

Show it:

• 1 a schematic cross-sectional view of a first embodiment of an elevator rope with a made of natural or synthetic fibers insert core,
• 2 and 3 Further variants of an elevator rope with insole made of steel strands and the steel strands of the cable insert completely enveloping intermediate layer.

In the following description of the figures, terms such as top, bottom, left, right, front, back, etc. refer exclusively to the example representation and position of the hoisting rope, the rope insert, the outer strands, the insert core and the like chosen in the respective figures. These terms are not meant to be limiting, that is to say, by different working positions or the mirror-symmetrical design or the like, these references may change.

In the 1 to 3 are denoted by the reference numeral 1 denoted overall respective embodiments of elevator cables according to the invention.

Each of the elevator ropes 1 has a rope insert 3 and several around the rope insert 3 looped outer strands 2 on.

The rope insert 3 has one of steel strands 5 sheathed core 6 on.

For improved contact closure between the rope insert 3 and the outer strands 2 is between the rope insert 3 and the outer strands 2 an intermediate layer 4 consisting of at least one meltable material arranged.

As materials for the intermediate layer 4 In particular, PVC, PE, PP, PA, ABS, PC, PUR or PET are suitable. Conceivable are also other suitable thermoplastic materials.

The rope insert 3 exists in the in 1 shown embodiment of an insert core 6 made of natural or plastic fiber core, that of steel strands 5 is sheathed.

The intermediate layer 4 is in the 1 shown embodiment variant between the steel strands 5 and the outer strands 2 appropriate. A Penetration of the individual steel strands 5 or the outer strands 2 with the material of the intermediate layer 4 is not intended.

Accordingly, the intermediate layer covers 4 at the in 1 embodiment shown facing each other lateral surfaces of the steel strands 5 the rope insert 3 and the outer strands 2 ,

The outer strands 2 are preferably made of a plurality of steel wires. The structure of the outer strands 2 preferably has a construction in Warrington, Seal, Filler or Warrington-Seal.

In the in the 2 and 3 shown embodiments of the elevator rope 1 consists of the insert core 6 from a steel strand and is with these surrounding other steel strands 5 stranded.

In particular, designed as a steel strand rope core 6 and the outer strands 2 consist of steel wires with different diameters, so that the first wires 21 . 61 , the second wires 22 . 62 and third wires 23 . 63 preferably constructions described above (Warrington, Seal, Filler or Warrington-Seal) are stranded.

The outer steel strands 5 the rope insert 3 are preferably formed from a central second wire, which is rotated together with several, preferably six first wires of the same diameter.

The number of outer strands 2 of the elevator rope 1 is preferably between six and ten.

In the in the 2 and 3 the embodiment shown, the intermediate layer extends 4 from the steel wires 5 facing lateral surfaces of the outer strands 2 into the area of the insert core 6 , so that the outer surface of the steel strands 5 the rope insert 3 in these embodiments completely of the material of the intermediate layer 4 is wrapped.

For the production of such an elevator rope 1 become the formation of a rope insert 3 first several steel wires and / or natural or synthetic fibers to an insert core 6 stranded.

The insert core 6 is with steel strands 5 stranded and thus provides a finished rope insert 3 represents.

After completion of the rope insert 3 be around the rope inserts 3 outer strands 2 beaten.

After stranding the rope insert 3 is before or during the stranding of the rope insert 3 with the outer strands 2 an intermediate layer 4 made of at least one meltable material on the rope insert 3 applied.

The material of the intermediate layer 4 Depending on the choice of material, it remains between the steel strands 5 the rope insert 3 and the outer strands 2 or, with a suitable material selection of the intermediate layer 4 the outer surface of the steel strands 5 the rope insert 3 completely envelop.

The rope 1 and the rope insert 3 have in one embodiment variant different lay lengths and are prepared as described above in two process steps.

Also conceivable is a Doppelparallelverseilung, in which the rope 1 and the rope insert 3 have the same lay lengths and are produced in one process step.

LIST OF REFERENCE NUMBERS

1

elevator rope

2

outer strands

21

first wire

22

second wire

23

third wire

24

fourth wire

3

rope core

4

interlayer

5

steel strands

51

first wire

52

second wire

6

insert core

61

first wire

62

second wire

63

third wire

64

fourth wire

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102011053202 A1 [0002]
• DE 202013102914 U1 [0002]

Claims (6)

Elevator cable (1), comprising a cable insert (3) and a plurality of outer strands (2) looped around the cable insert (3), wherein the cable insert (3) comprises an insert core (6) sheathed by steel strands (5), characterized by a between the cable insert (3) and the outer strands (3) arranged intermediate layer (4) of at least one fusible material. Elevator rope after Claim 1 , characterized in that the intermediate layer consists of one or more thermoplastic materials, in particular PVC, PE, PP, PA, ABS, PC, PUR, PET. Elevator cable according to one of the preceding claims, characterized in that the insert core (6) is formed as a natural or plastic fiber core or steel strand. Elevator rope according to one of the preceding claims, characterized in that the intermediate layer (4) covers mutually facing lateral surfaces of the steel strands (5) of the cable insert (3) and the outer strands (2). Elevator rope according to one of the preceding claims, characterized in that the intermediate layer (4) completely envelops the lateral surface of the steel strands (5) of the cable insert (3). Method for producing an elevator rope (1), wherein a plurality of steel wires and / or natural or synthetic fibers are stranded to form an insert core (6) to form a cable insert (3), wherein the insert core (6) is stranded with steel strands (5) and the cable insert (3) outer strands (2) are beaten, characterized in that after stranding the cable insert (3) before or during the stranding of the cable insert (3) with the outer strands (2) an intermediate layer (4) of at least one meltable material is applied to the rope insert (3).

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