EP3099854B1 - Rope assembly - Google Patents

Description

The present invention relates to the use of a cable assembly as winch rope or rope for traction sheave drives.

Ropes made of textile fiber material, which can be used as winch ropes, are for example from EP 1 061 172 A known. The advantage of such ropes (which are composed in particular of high-strength synthetic fibers) compared to conventional steel cables is in particular their lower weight.

The problem of the use of particular ropes of textile fiber material, which must run on pulleys (as only one example of wind publications related to the WO 2011/121272 A1 called), is that the ropes should be free of torque as possible.

This problem is in the EP 1 061 172 A using twisted ropes solved by two separate ropes, each with different rotational direction (S and Z) are arranged side by side and fixed by means of a common cable sheath, which acts as a torque arm.

Already in the DE 2 114 278 A1 a similar solution was proposed using steel cables.

The disadvantage of in the EP 1 061 172 A proposed solution is that the case may occur that one of the separate ropes carries more load than the other. This is associated with the risk of overloading or failure of the rope.

Another problem is how such a "double rope" can be tied up. Often terminals are used for the connection of such cables. However, this is unfavorable for textile ropes, in particular when using transversely pressure-sensitive, high-strength fiber materials, which have a lower transverse compressive strength compared to steel wires.

DE 10 2009 005093 A1 and US 2007/111588 A1 describe cable assemblies for different applications from the subject area.

The object of the present invention is to provide a product of textile fiber material which is suitable, in particular, as a cable for winch applications or traction sheave drives, which avoids the problems described above.

This object is achieved according to the invention by the use of a cable composite comprising at least one rope formed from textile fiber material as a winch rope or as rope for traction sheave drives, for example by forming two cable sections running essentially parallel next to one another. as elevator rope, in Koepe conveyors and capstan winches, solved, between the two cable sections load compensation is possible and wherein the cable sections are surrounded by a common shell.

Brief description of the figures

• FIG. 1 shows a schematic plan view of an embodiment of the invention used cable assembly.
• FIG. 2 shows a schematic cross-section of an embodiment of the cable assembly used in the invention.
• FIGS. 3 to 6 show various embodiments of a cable assembly, which is obtained by repelling two ropes.
• FIGS. 7 and 8 show embodiments of a cable assembly according to the invention with several separated parts of the shell.

In the cable assembly used according to the invention, two separate cables are not connected to one another by means of a sleeve acting as a torque support, but instead a single cable (for example in the middle) is deflected back through 180 °, so that the two cable sections that are formed lie substantially parallel to each other.

Between the resulting cable sections load balancing is possible, e.g. by being movable against each other.

The cable sections are surrounded by a common shell, which serves to stabilize the cable sections and thus the cable network. However, the sheath is designed so that the load balance between the two cables is not hindered.

By repelling the rope creates a loop that can be used in a simple way as a final connection.

A preferred embodiment of the cable composite used in the invention is characterized in that the cable assembly contains two or more folded-back ropes.

So it will be repelled two or more ropes and sheathed the resulting cable sections with a common shell.

This embodiment is advantageous because several thin strands on the positive connection give better adhesion of the cable assembly on the disc. In addition, the amount of material (and thus the breaking strength of the entire cable assembly) is distributed over several ropes, so that the rope diameter is smaller, i. that the cable assembly takes on an increasingly "flat" shape.

In particular, when using twisted ropes, an embodiment consisting of at least two folded-back ropes is advantageous because a single rebound rope could induce a torque depending on its exact construction. If you use a second twisted rope with the opposite direction of rotation, this problem can be avoided.

In sum, the combination of cables used must be designed so that it does not twist in the resulting cable assembly in operation, i. that it is essentially torque neutral.

In the embodiment of two or more folded-back ropes, it is not necessary for the two rope sections of a rope which are formed when repelling to come to lie directly next to one another. It can also be an arrangement in which the resulting cable sections of the various cables run mixed with each other, are provided, provided that in total all cable sections are substantially parallel.

In a preferred embodiment, all emerging cable sections lie in one plane, so that the cable assembly assumes a band-like shape.

However, arrangements are also possible in which individual cable sections, e.g. obliquely offset to other cable sections.

It is important for all applications that the cable composite used in accordance with the invention, e.g. Based on the resulting by the arrangement of the cable sections outer shape, but possibly also by using different heavy ropes corresponding weight distribution, it is constructed so that in use (eg on deflection pulleys, baffles, traction sheaves, capstans, capstan winches, storage drums and the like.) Is not rotatable about itself.

In a further preferred embodiment, at least one of the cable sections runs in a separated part of the casing. This separation can e.g. be generated by a running between two cable sections seam. It is important again that the load balance between the rope sections is not hindered. It can be provided several separated parts, which will be explained in more detail below.

In the cable composite used according to the invention, at least one additional strand, e.g. a conductive wire or an optical fiber are carried.

The ropes that can be used in the rope assembly used according to the invention can be braided or turned / beaten. As mentioned above, when using twisted ropes, the use of at least two ropes with different directions of rotation is preferred.

In the case of several cables used ropes can have the same or different diameters. The ropes can be made of the same or different materials. The ropes can be of the same or different construction type. In this case, it would be conceivable that at first one of the ropes takes over the load and the second rope or the other ropes (initially) does not have load-bearing effect due to other properties, but is or are present as redundancy.

In any case, however, the resulting cable assembly must be torque-neutral and it must come within a folded rope to a load balance, so that both rope sections wear the same.

High-strength textile fiber materials and units formed therefrom, such as threads, strands, etc., which are known per se to the person skilled in the art, can be used as the material for the cables to be used.

The sheath used for sheathing the cable sections may consist essentially of any material, provided that it does not hinder the load balance between the cable sections. Thus, the sheath may be formed of an extruded plastic sheath, or in turn of braided, woven or knitted fiber material.

The sheath can surround all cable sections together as in the manner of a single tunnel or can be divided into two or more separated parts, ie "sub-tunnels" in which the cable sections individually or possibly also partially individually and partially in pairs or in even higher numbers be guided.

The sub-tunnels can be created by suturing. Likewise, it is possible to produce a shell consisting of several sub-tunnels in the course of a braiding process, in which two (or more) braiding machines run side by side in parallel and the clappers are exchanged between the braiding machines, so that two independent braided sheaths are not created, but connections between them consist.

The cable composite used according to the invention is particularly suitable as a winch rope or rope for traction sheave drives, e.g. as elevator rope, in Koepe conveyors and in capstan winches.

In the following, the present invention will be explained in more detail with reference to FIGS.

FIGS. 1 (Plan view) and 2 (cross section) show schematically a preferred embodiment of a cable assembly 1 used according to the invention, which is obtained by repelling a rope 2 of textile fiber material which is not specified here in more detail. When the rope 2 is driven back, two cable sections 2 'and 2 "are formed, which are surrounded by a common, preferably continuous casing 4, eg of textile material, which stabilizes the cable sections 2' and 2" but does not balance the load between the two cable sections impeded, so that they are in particular mutually displaceable.

The repelling of the rope 2 results in a loop which is suitable in a simple manner as the final connection.

The sheath 4 is in the in Figures 1 and 2 shown preferred embodiment separated by a seam 5 into two parts, so that the two cable sections 2 'and 2 "each extend in a separated part of the shell 4, but without the mutual displacement and thus the load balance between the cable sections is prevented.

In the FIGS. 3 to 6 are cross sections of various embodiments of a repelling two ropes to obtain a total of four rope sections 2 ', 2 ", 3' and 3" constructed cable assembly shown. Like from the FIGS. 3 to 5 As can be seen, the cable sections 2 ', 2 "and 3', 3" obtained from the two cables may be in different arrangements.

So can ( FIG. 3 ) each of the cable sections obtained by the repelling of a cable are adjacent to one another, or else ( FIGS. 4 and 5 ) are mixed with the rope sections obtained from the other rope.

In the embodiments of the FIGS. 3 to 5 are the obtained cable sections 2 ', 2 ", 3' and 3" each in a plane and are stabilized in this form by the respective common shell 4. This results in a flat, ribbon-like design of the resulting cable composite.

As in FIG. 6 shown, but other arrangements of the obtained cable sections, such as offset obliquely against each other possible. Also in the embodiment of the FIG. 6 the arrangement of the obtained four cable sections to each other (ie immediately adjacent to the second cable section obtained from the same rope or mixed with cable sections from the other cable) can be designed arbitrarily, which is why the cable sections obtained in FIG. 6 are not specified.

Also in the embodiments of the cable assembly used in the invention, which are obtained from two or more ropes, separated parts of the sheath can be provided, as in the FIGS. 7 and 8 shown.

In the embodiment according to FIG. 7 are obtained by three seams 5 ', 5 "and 5'" a total of four separated parts of the shell 4, in each of which a cable section (not designated here) runs.

According to FIG. 8 are obtained by two seams 5 'and 5 "three separated parts of the shell 4, wherein in the respective outer parts in each case a cable section extends and two cable sections are arranged in the central part.

Of course, here are a variety of other possibilities of separations and arrangements of cable sections possible, easily recognizable to the skilled person.

For all the embodiments shown, it is true that a load compensation is possible between the cable sections of a rope obtained, in particular by being mutually displaceable. Of course, this does not exclude that the cable assembly optionally has additional strands or additional cable sections obtained by repelling a cable without possibility of load balancing.

Claims (7)

1. The use of a rope assembly (1) consisting of at least one rope (2) that is made of textile fibre material and is folded back to form two substantially parallel rope portions (2', 2"), wherein load distribution between the two rope portions is enabled and the rope portions are surrounded by a common sleeve (4), as a winch rope or as a rope for drive pulley drives.
2. The use according to claim 1, characterized in that the rope assembly contains two or more ropes (2', 2", 3', 3") which have been folded back.
3. The use according to claim 1 or 2, characterized in that at least one of the rope portions (2', 2", 3', 3") runs in a detached part of the sleeve (4).
4. The use according to any of the preceding claims, characterized in that at least one additional strand, e.g., a conductive wire or an optical waveguide, is carried along in the rope assembly.
5. The use according to any of claims 2 to 4, characterized in that the rope portions (2', 2", 3', 3") are coplanar so that the rope assembly assumes a band-like shape.
6. The use according to any of claims 2 to 5, characterized in that the rope assembly is not twistable around itself during use.
7. The use according to any of the preceding claims, characterized by the use of the rope assembly (1) as a lift cable, in Koepe hoists or in capstans.

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