EP2831337B1 - Core-sheath rope - Google Patents

Description

Core-sheath cable

The present invention relates to a core-sheath rope comprising a textile core having one or more longitudinally extending standing threads, an outer sheath in the form of a hollow braid, and an inner sheath surrounding the core and being in the form of a hollow braid.

Core sheath ropes are known and, for example, in the AT 358.433B . WO 2003/27383 A . WO 2005/085518 A . DE 40 35 814 A1 . US 4,312,260 A and the DE 40 38 161 A described.

The problem with existing core sheathing cables is the defective connection between core and sheath. In particular, a relative displacement of core and sheath may occur when using the rope. This shift leads to annoying thick spots, a poor power transmission from the shell into the core and overload in the shell, which can lead to the crack of the shell. There are several approaches to stopping this core-shell shift:
One possibility is the use of an adhesive or an adhesive tape (see, eg DE 40 38 161 A or GB 891,741 ). The gluing is not durable durable, it also prevents any relative movement between the core and coat, thus leading to a stiffening of the ropes and thus to a bad Knotbarkeit.

It is also known to bring the core and sheath by connecting threads from the core with threads from the sheath or by additional transverse threads together more in contact (see, eg WO 2003 / 27383A . WO 2005 / 088518A ).

In the documents EP 2 239 359 A1 . DE 10 2007 063 052 A1 . DE 131208 C and DE 223466 C braiding machines are described in which due to the arrangement of the braiding bobbin thread change are provided to the effect that threads from the outer region of the rope (eg an outer shell) in the inner region (eg an inner shell) change and vice versa. Likewise, according to these documents, an entanglement between outer and inner threads can be provided.

The EP 2 063 018 describes a strand element with a core of silicone material, which is covered by a textile sheath. From the WO 2006/055995 It is known to provide the individual elements of a rope with a reinforcement. Further prior art is in the FR 334.887 , the US 2,600,395 A , the DE 25 41 763 A and the US 4,192,127 A revealed.

There is still a need for core sheath ropes with satisfactory performance properties, particularly as regards the stability of the core and sheath connection throughout the life of the rope.

In addition, in core sheath ropes, the core of which consists of several longitudinally extending threads, this core has a low dimensional stability. If one mentally removes the mantle, the core disintegrates into its individual longitudinally extending threads. Thus, a power transmission from the shell to all the core forming threads can be done only insufficient, but not all threads forming the core are used to the same extent to take over load.

The present invention provides a core-sheath rope according to claim 1.

Brief description of the figures:

• FIG. 1 schematically shows the structure of a preferred embodiment of a core-sheath rope according to the invention and its preparation.
• FIGS. 2 to 7 schematically show alternative embodiments of thread changes or wraps.

Detailed description of the invention:

For the purposes of the present invention, the term "threads" are understood to mean the thread-like components of a rope, such as threads or braided elements. A thread may consist of several adjacent elements, such as several contiguous plying, where the adjacent elements take the same course over the entire rope.

In the following, the term "standing threads" refers to threads which, in contrast to the threads of the inner and outer sheath, extend completely in the longitudinal direction of the rope.

According to the invention, at least part of the standing threads of the core running in the longitudinal direction of the rope are individually woven into the hollow mesh of the inner shell. As explained above, the term "thread" also encompasses a plurality of adjacent cable elements, such as e.g. a bundle of multiple, single-break, twisted threads.

In contrast to proposals in which all standing threads of the core are braided together by the jacket or on the other hand individual standing threads have a reinforcement, but are not connected to each other, thus standing threads of the core are woven into the hollow mesh of the inner shell. This results in a better connection and integration of the core with the inner shell.

According to the invention, a part of the standing threads of the core is not woven individually into the hollow mesh of the inner shell.

According to the invention, the standing threads which are not individually braided in the hollow braid of the inner jacket are arranged in the center of the core.

Thus, thus standing threads of the core without connection to each other, and without being braided into the inner shell, in the center of the core before, while more threads are woven into the hollow mesh of the inner shell.

In a preferred embodiment of the rope according to the invention thread changes between threads of the inner shell and threads of the outer shell and / or wraps between threads of the inner shell and threads of the outer shell are provided at certain points.

In this variant of the present invention, it is particularly preferred if at the points of the thread change or wraps in the longitudinal direction of the rope extending bridge threads are provided around which the from inside to outside or from outside to inside changing threads of the outer shell or inner Mantels are led.

Starting from the thread changes between threads of the outer shell and the inner shell described in the above-cited documents and wraps between threads of the outer shell and the inner shell are in this preferred embodiment of the invention at these points of the thread change or the wrap additional longitudinally extending Stehfäden (bridge threads) provided.

• Ein Wechsel des Fadens vom äußeren Mantel in den inneren Mantel und umgekehrt, wobei der von innen nach außen und der von außen nach innen geführten Faden um den Brückenfaden geführt werden.
• Ein Faden des inneren Mantels und ein Faden des äußeren Mantels werden umeinandergeführt, aber anschließend wieder an der ursprünglichen Position weitergeführt, d.h. der Faden des inneren Mantels wird wieder im inneren Mantel weitergeführt und analog der Faden des äußeren Mantels wieder im äußeren Mantel. Der Brückenfaden liegt hier zwischen dem Faden des inneren Mantels und des äußeren Mantels und wird von mindestens einem der Fäden umschlungen. Obwohl in dieser Variante der Faden des inneren Mantels und der Faden des äußeren Mantels nicht direkt miteinander verschlungen sind, sondern über den Brückenfaden, wird diese Ausführungsform für die Zwecke der vorliegenden Erfindung als "Umschlingung" bezeichnet.
• Eine Umschlingung und ein Fadenwechsel, d.h. ein Faden des inneren Mantels und ein Faden des äußeren Mantels werden wie oben beschrieben umeinandergeführt, wechseln aber zusätzlich die Position, d.h. der Faden des inneren Mantels wird im äußeren Mantel weitergeführt und vice versa. Der Brückenfaden liegt hier zwischen dem Faden des inneren Mantels und des äußeren Mantels und wird von beiden Fäden umschlungen.

The following possibilities are conceivable:

• A change of the thread from the outer shell into the inner shell and vice versa, wherein the guided from the inside to the outside and the outside to the inside thread is guided around the bridge thread.
• A thread of the inner shell and a thread of the outer shell are led around each other, but then continued back to the original position, ie the thread of the inner shell is continued again in the inner shell and analogous to the thread of the outer shell again in the outer shell. The bridge thread lies here between the thread of the inner jacket and the outer jacket and is looped around by at least one of the threads. Although in this variant the inner sheath thread and the outer sheath thread are not intertwisted directly but over the bridge thread, this embodiment is referred to as "looping" for purposes of the present invention.
• A wrap and a thread change, ie a thread of the inner shell and a thread of the outer shell are routed around each other as described above, but also change the position, ie the thread of the inner shell is continued in the outer jacket and vice versa. The bridge thread is here between the thread of the inner shell and the outer shell and is wrapped by both threads.

Preferably, the bridge threads are looped by the threads of the inner shell and the threads of the outer shell.

In all cases, however, the intended bridge threads are encompassed by both the threads of the outer jacket and the threads of the inner jacket, thus forming a bridge between the outer jacket and the inner jacket. At the same time, the (load-bearing) bridge thread remains in the pulling direction, so that it contributes to the breaking load of the rope, which is primarily determined by the threads in the pulling direction.

Of course, the threads of the inner sheath and the threads of the outer sheath can also be passed around the bridge thread several times and then either continued to their original position or change the position from the outside in and vice versa.

The bridge threads preferably consist of the same material as the standing threads of the core.

In a further preferred embodiment, the core-sheathed cable according to the invention has threads with different properties.

In particular, properties such as color, titer, fiber type (e.g., monofilament, staple fiber, multifilament), fibrous material (e.g., polyamide, aramid, HMW-PE) or construction (e.g., ply of various art and or twist) are contemplated.

Thus, e.g. the threads, which are initially performed in the inner jacket and the threads, which are initially performed in the outer jacket, have different colors. As a result, the changes from the outside can be made color recognizable. Also, length markings on the rope are possible by color change. Also within the thread material of the inner shell and / or the outer shell threads with different properties, in particular colors, can be provided.

In a further preferred embodiment, the core-sheath rope according to the invention has threads with different fineness. Thus, e.g. the threads that are initially performed in the inner jacket and the threads that are initially performed in the outer jacket, different fineness (titer) have. In particular, large differences in the fineness of a yarn change lead to deliberate irregularities in the rope and to different roughness.

Preferably, the core-sheathed cable according to the invention further standing in the longitudinal direction of the rope standing threads, which are braided individually in the hollow braid of the outer shell. There are thus provided in the outer region of the rope further glass-carrying elements, which are also intimately connected by braiding with the threads of the shell, here the outer shell.

The bridge threads and / or the standing threads of the outer jacket may be made of the same material as the standing threads of the core.

Moreover, all materials familiar to the person skilled in the art can be selected for the rope according to the invention.

FIG. 1 schematically shows the structure of a preferred embodiment of the cable 1 according to the invention and its production on the basis of the possible arrangement in a round braiding machine. For details of such a braiding machine reference is made to the above-cited prior art documents. The production of a rope according to the invention, in which no connection between the inner and the outer jacket is provided, but can also be done in a two-stage process in which first the inner sheath braided with standing yarns and in a second step, the outer sheath done.

The rope 1 comprises a core 2 with a plurality of core threads (standing threads) 21-28. An inner jacket 4 is located around these standing threads. Furthermore, an outer jacket 3 is provided.

Inner sheath 4 and outer sheath 3 are formed by braiding in a manner known per se, wherein the threads of the inner sheath as well as the threads of the outer sheath are intertwined with each other by means of braiding clusters (not shown). In a known manner, the braiding bobbins on driving wheels (not shown) are arranged. For example, 12 braided bobbins may be provided for the production of the inner shell, of which in each case 6 clappers in the Z direction and 6 clappers are guided in the S direction. The resulting thread paths are indicated by solid or dashed lines. The same applies to the outer jacket. By way of example only, with the reference numerals 41 and 42, two threads of the inner shell and with the reference numerals 31 and 32, two threads of the outer shell indicated.

According to the invention, a part of the standing threads of the core is woven individually into the hollow mesh of the inner shell. This is in the FIG. 1 for the threads 21 to 26, which are each individually woven into the threads (exemplarily: 41, 42) of the inner jacket. The threads 21 to 26 may consist of one or more adjacent elements, such as twisting, which are fed from apertures in the drive wheels.

Moreover, the core in the in FIG. 1 illustrated embodiment, two standing threads 27 and 28, which lie in the center of the core. Of course, these are included Completion of the rope in intimate contact with the threads of the inner shell and the other Stehfäden the core, but are not interconnected and not woven into the inner shell.

With the reference numerals 5 and 6 positions for thread changes or wraps are shown, in which, as explained above, according to a preferred variant of the present invention, threads of the outer sheath in the inner sheath and vice versa and / or threads of the outer sheath and threads of inner mantle are entwined with each other. This is, as is known, achieved by appropriate positioning of two braided bobbins (not shown) on a drive wheel (not shown).

According to the preferred embodiment of the present invention, bridge threads 51 and 61 are now arranged at the thread changing positions 5 and 6, in such a way that they come to rest between the threads changing from outside to inside (and vice versa) or between the threads that wrap around each other. Apparently, this is achieved by the provision of a breakthrough in responsible for the change of thread or wrapping drive wheel.

After completion of the rope thus these bridge threads are intimately connected to the threads of the inner and outer sheath and thus provide an even better connection between these two elements and at the same time increase the breaking load of the rope.

The exact manner of the change of thread or looping now depends on the one hand on how many degrees the wicker bobbins on the drive wheels of the thread changing positions 5 and 6 are routed around, as well as whether the mutually changing or wrap around threads of the outer and inner mantle are guided in opposite directions or in the same direction.

Whether the mutually changing or looping threads of the outer and inner sheath are guided in opposite directions or the same depends on the direction of rotation of the drive wheels of the inner and the outer shell: If the drive wheels out in opposite directions, results for the mutually changing or The threads of the inner and outer mantle, which wrap around each other, lead in the same direction and vice versa.

Some possible variants are based on the FIGS. 2 to 7 explains:
Therein, in each case in the area of the thread change position 6, the course of a thread (A), which is (initially) in the outer shell, with a thick dotted line and the course of a thread (I), which is (initially) in the inner shell, shown with a thick dashed line. With the arrows in the region of the inner and outer sheath respectively the direction of movement of the threads (A) and (I) on the braiding machine, namely clockwise or counterclockwise, indicated.

FIG. 2 shows a "simple" thread change of a thread coming from the outer jacket (A) and coming from the inner jacket thread (I) in a variant in which A and I are guided in opposite directions. Thread A changes inwards and thread I changes to the outside, whereby the threads are guided around the bridge thread B. Structurally, this is achieved in that the filaments A and I carrying braided bobbins are guided on the drive wheel of the thread changing position by 180 °.

FIG. 3 shows a wrap, ie outer thread A and inner thread I are once passed around each other, but are then continued at the original position (ie, A in the outer shell and I in the inner shell). This is achieved structurally in that the braiding bobbins carrying the threads A and I are guided on the drive wheel of the thread change position by 360 °. The bridge thread B lies in the middle of the threads A and I and is thus entwined by them.

FIG. 4 shows a wrap with thread change, ie coming from the outer jacket thread A and coming from the inner shell thread I are once run around each other and then change the position, ie thread A changes into the inner shell and thread I changes into the outer shell. In terms of design, this is achieved by guiding the braiding bobbins carrying the threads A and I on the drive wheel of the thread change position by 540 ° (360 ° + additionally 180 °). The bridge thread B is again in the midst of the threads A and I and is thus entwined by these.

The FIGS. 5 to 7 show analogous embodiments to the FIGS. 2 to 4 , but the threads A coming from the outer jacket and the threads I coming from the inner jacket are guided in the same direction. You can see them from the FIGS. 2 to 4 distinctive thread courses, which are also recognizable in the finished rope.

According to the invention, it is preferable if the threads of the outer jacket and the inner jacket, which change or wrap around one another, are guided in opposite directions.

In a manner similar to the standing threads 21 to 26 of the core, standing threads may also be provided in the longitudinal direction in the region of the outer jacket, which are braided by the threads of the outer jacket. This is in the FIG. 1 for example, only by reference numerals 71 and 72 shown.

Claims (8)

1. A core-sheath rope (1), comprising a textile core (2) with several stationary threads (21-28) completely extending in the longitudinal direction of the rope, an outer sheath (3) provided in the form of a hollow braid, and an inner sheath (4) provided in the form of a hollow braid and surrounding the core (2),
   characterized in that part of the stationary threads of the core (21-26) are braided individually into the hollow braid (41, 42) of the inner sheath (4) and that part of the stationary threads (27, 28) of the core (2) is present in the centre of the core without being connected to each other and without being braided into the inner sheath.
2. A core-sheath rope according to claim 1, characterized in that thread changes between threads (41, 42) of the inner sheath (4) and threads (31, 32) of the outer sheath and/or enlacements between threads (41, 42) of the inner sheath (4) and threads (31, 32) of the outer sheath (3) are provided in certain places (5, 6).
3. A core-sheath rope according to claim 2, characterized in that, in the places (5, 6) of the thread changes or enlacements, bridge threads (51, 61) extending in the longitudinal direction of the rope are provided, with the threads of the outer sheath and the inner sheath, respectively, which change from the inside to the outside and from the outside to the inside, respectively, being guided around those bridge threads.
4. A core-sheath rope according to claim 3, characterized in that the bridge threads (51, 61) are enlaced by the threads of the inner sheath and the threads of the outer sheath.
5. A core-sheath rope according to any of claims 3 or 4, characterized in that the bridge threads (51, 61) consist of the same material as the stationary threads of the core (21-28).
6. A core-sheath rope according to any of the preceding claims, characterized in that it comprises threads which differ from each other by way of one or more properties.
7. A core-sheath rope according to any of the preceding claims, characterized in that it comprises further stationary threads (71, 72) braided individually into the hollow braid (31, 32) of the outer sheath.
8. A core-sheath rope according to any of claims 3 to 5, characterized in that the threads of the inner sheath and the outer sheath changing with each other or, respectively, interlacing with each other, are guided in opposite directions.

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