DE102021130393B4 - Kernmantle rope - Google Patents

Abstract

Core-sheath rope with a rope sheath SM designed as a hollow braid, which consists of several sheath yarns MG and a rope core SK arranged in the interior of the rope sheath SM, which consists of a core braid KG made of braided core yarns, wherein the core braid KG surrounds several core twists KZW as core inserts, and with a spliced rope end, wherein the rope end consists of a first rope section SAS1, a second rope section SAS2 and an eye A, wherein in the first rope section SAS1, at a crossing point K1, some of the core twists KZW are led out of the interior of the core braid KG and are led back along the outgoing sheath section SM' and over the eye A to the beginning of the second rope section SAS1, where they are folded over at a second crossing point K2 and emerge from the returning sheath section SM'' and run parallel over the entire second rope section SAS2 between the outgoing sheath section SM' and the returning sheath section SM'' be conducted.

Description

The invention relates to a kernmantle rope according to the preamble of claim 1.

For many decades, so-called "core-sheath" constructions for textile ropes have been known as core-sheath ropes. The basic principle of core-sheath ropes is to surround a textile (possibly braided) rope core with a sheath that is designed as a hollow braid (sheath braid). The rope core usually takes on the task of absorbing force or energy. The rope sheath usually serves to fix the rope core and protect it from environmental influences. To a certain lesser extent, the rope sheath, i.e. the sheath braid, can also absorb forces.

Kernmantel ropes are known from the following documents, including AT 358 433 B , WO 2003/ 027 383 A1 , WO 2005/ 085 518 A2 , DE 40 35 814 A1 , US 4 312 260 A and the EN 40 38 161 A1 .

There are different options for connecting textile ropes to other elements. A distinction is made between temporary rope end connections, such as knots, and permanent rope end connections, such as sewing, pressing, gluing or splicing.

• - Spleiße benötigen gegenüber den oben genannten anderen Varianten von Seilendverbindungen keine zusätzlichen Materialien wie z.B. Nähgarn, Klebstoff, Manschetten etc.
• - Spleiße stellen eine sehr kompakte Variante einer Endverbindung dar
• - Spleiße weisen geringere Festigkeitsverluste gegenüber den meisten anderen Varianten auf
• - Spleiße können sowohl auf textilen Seilen wie auch auf Seilen aus anderen Materialien wie z. B. Metalldrähten realisiert werden

Compared to all types of rope end connections, splices offer special advantages:

• - Compared to the other types of rope end connections mentioned above, splices do not require any additional materials such as sewing thread, adhesive, cuffs, etc.
• - Splices represent a very compact variant of an end connection
• - Splices have lower strength losses compared to most other variants
• - Splices can be made on textile ropes as well as on ropes made of other materials such as metal wires

Splicing is one of the oldest ways of creating a rope end connection. There are very different splicing methods depending on which material (steel, HMPE, polyamide, etc.) or which construction (twisted, braided, kernmantle rope, etc.) is to be spliced for which function (end connection, round sling, thickening of the end, etc.).

There are two very common splice constructions for kernmantle ropes, depending on whether the rope core is in the form of a core braid or in the form of individual core twists.

This type of splicing offers a very high, if not the highest possible, strength of a rope end connection. In addition, the load-bearing rope core is completely protected by the rope sheath. This protection also ensures a high level of safety. In addition, this type of splice is less susceptible to coming loose and coming undone, for example during use. By splicing the returned rope sheath and the inner rope core together, a closed loop is created that only gets bigger if it comes loose, but cannot come undone.

The disadvantage of this splice construction, however, is the double rope diameter in the eye, as well as the thicker and very stiff rope section in the area of the core braid running out inside.

One disadvantage is that these stiff and thickened ends cannot be inserted through certain non-opening devices for ascending, descending and/or positioning on the rope.

There are also other types of kernmantle ropes that do not have a braided rope core, but only have individual parallel core twists in the rope core ( 3 ). These kernmantle ropes have a splice construction ( 2 ) is not possible because the rope core does not have a compact structure and the rope sheath cannot simply be inserted into the rope core. Here it is necessary to clamp the returned sheath section in the sheath section running towards the eye with the core twists. The core twists are cut off when making the splice and only the rope sheath is fed back over the eye ( 4 ).

The advantage of this type of splice is that the entire rope, including the end connection, has a uniform diameter. The feel is also the same over the entire length of the rope.

The disadvantage here, however, is that only the sheath braid is guided over the eye. This means that the strength of this splice is reduced. This splice also offers less safety, as damage to the sheath in the area of the eye leads to a significant reduction in strength. In addition, these splices can potentially come loose completely if the clamping effect loosens, for example during use. Various splice hybrid designs are also known for different kernmantle ropes.

Compact spliced rope end connections, where there is no increase in the rope diameter, always offer less strength and/or safety because the eye is only formed by the rope sheath.

The object of the invention is to provide a kernmantle rope with a spliced rope connection which does not have the disadvantages mentioned above and which ensures high strength and safety, with a uniform feel and without a significant increase in the rope diameter.

This object is achieved by the features specified in claim 1. Advantageous further developments are specified in the subclaims.

The main idea of the invention is that in a core-sheath rope that has both a core braid and individual core twists, some core twists are led out of the center at a first crossing point (transition point) and led back over the eye, and led out of the returning sheath section at a second crossing point and folded over and led almost to the eye between the outer sheath section and the sheath section running back inside. In addition, the returning sheath section penetrates the core braid at a third crossing point.

The invention provides a kernmantle rope that has a substantially constant rope diameter and a high strength.

The invention is explained in more detail below using an embodiment.

• 1 Kernmantelseil mit geflochtenen Seilkern
• 2 Spleiß eines Kernmantelseils gemäß 1
• 3 Kernmantelseil mit mehreren Kernzwirne
• 4 Spleiß eines Kernmantelseils gemäß 3
• 5 erfindungsgemäßer Spleiß eines Kernmantelseils mit einem Kerngeflecht und einzelnen Kernzwirne
• 6 Kernmantelseils mit einem Kerngeflecht und einzelnen Kernzwirne

Show it:

• 1 Kernmantle rope with braided rope core
• 2 Splice of a kernmantle rope according to 1
• 3 Kernmantle rope with multiple core twists
• 4 Splice of a kernmantle rope according to 3
• 5 inventive splice of a core-sheath rope with a core braid and individual core threads
• 6 Kernmantel rope with a core braid and individual core twists

In 1 a kernmantle rope KMS with a rope sheath SM and a rope core SK made of several core braids KF is shown in perspective view

2 shows a standard splice for a kernmantle rope KMS according to 1 in a very schematic representation, the braided rope core SK, ie the core braid KG, is inserted into the braided rope sheath SM, the sheath braid. Inserting the rope core SK into the rope sheath SM is also referred to as the transition point ÜSt or crossing point (crossover). The loop created by splicing is usually referred to as eye A. The rope core SK continues inside the eye A and is pressed in behind the eye A between the rope sheath SM and the original rope core SK.

The load-bearing rope core SK is completely protected by the rope sheath SM. This protection also ensures a high level of safety. In addition, this type of splice is less susceptible to coming loose and coming undone during use, for example. By splicing the returned rope sheath SM and the inner rope core SK together, a closed loop is created which only gets larger if it comes loose, but cannot come undone.

In this splice construction, the rope diameter in the area of eye A is doubled and very stiff.

In 3 Another type of kernmantle rope that does not have a braided rope core is shown. The rope core SK has only individual parallel core twists KZWW.

These kernmantle ropes have a splice construction according to 2 not possible because the rope core SK does not have a compact structure and the rope sheath SM cannot simply be inserted into the rope core SK. Here it is necessary to clamp the returned sheath section SM'' in the sheath section SM' running towards the eye with the core twists KZW.

In 4 is shown where the cut core twists KZW end. When making the splice, these core twists KZW must be cut accordingly. Only the rope sheath SM is fed back via the eye A.

In 5 is shown a splice according to the invention of a kernmantle rope with a core braid and several core twists. A corresponding kernmantle rope is shown in 6 seen in oblique view and in section.

In a first rope section SAS1, some of the inner core twists KZW end. For the sake of clarity, only 3 core twists are shown. The number of core twists can vary greatly. The remaining core twists KZW are from the core braid KG at a crossing point K1. These two core twists KZW are then passed on between the outer sheath section SM' and the returning sheath section SM''. In a second rope section SAS2, at the crossing point K2, these two core twists KZW are passed out of the returning rope sheath SM'' and folded over and passed between the returning sheath section SM'' and the forward sheath section SM' almost to the rope eye A.

The end of the kernmantle rope is divided into three sections. The first rope section SAS1 in which a core twist KZW ends and two core twists KZW penetrate the kernmantle KM at the crossing point K1. The core braid KG running towards the eye and the sheath section SM'' running back also end in this rope section. As can be seen from the 5 As can be seen, the rope diameter is essentially the same.

In the second rope section SAS2, the core twists KZW penetrate the returning sheath section SM'' at the crossing point K2 and the folded-back core twists KZW end shortly before the eye A. In this rope section SAS2, the rope diameter is slightly larger due to the folded-back core twists KZW.

The third section consists of the eye A, with the two core twists KZW and the outer rope sheath SM.

The rope construction consists of an outer braided rope sheath SM with, for example, 24 sheath yarns MG. The number of sheath yarns can be between 16 and 48. The braided rope core SK also consists of 24 core yarns and 3 core inserts, whereby the number of sheath yarns can also vary between 16 and 48 and the number of core inserts between 1 and 6. In such core-sheath ropes KMS, none of these elements (sheath, core braid, core inserts) are connected to one another in any way. The core inserts running in the middle are also referred to as standing threads. The presence of these three elements is essential for the splice according to the invention, but not how many yarns the individual elements consist of.

In principle, the material of the elements is not decisive for the splice. As a rule, "synthetic fibers" such as polyester or polyamide are used. The production of splices is still carried out by hand.

6 shows a kernmantle rope with a rope sheath SM, a core braid KG and three core twists KZW. A similar kernmantle rope is available from the US 8 136 438 B2 known.

The invention offers a spliced rope end connection that does not significantly increase the rope diameter over the entire length of the rope, and that keeps the feel equally flexible over the entire length of the rope. The core-sheath construction according to the invention provides a high level of safety and/or strength in the area of the eye because at least some core threads are guided over the rope eye A as load-bearing components. In extreme cases, the core-sheath rope according to the invention can therefore at least reliably bear the weight of a person.

In the kernmantle rope according to the invention, the operating principles and characteristics of the standard splice of kernmantle ropes with core braids (i.e. splicing two braids into each other, (load-bearing core in the eye)) are combined for the first time with those of the standard splice of kernmantle ropes with individual core twists (jamming).

The invention enables the rope diameter not to increase within a certain percentage of less than 10%, preferably less than 5%, the feel remains the same and the core inserts in the eye bear at least the body weight of the person to be secured.

Furthermore, the splice can be secured using a blind stitch over the annual marking thread.

Claims (8)

Core-sheath rope with a rope sheath SM designed as a hollow braid, which consists of several sheath yarns MG and a rope core SK arranged in the interior of the rope sheath SM, which consists of a core braid KG made of braided core yarns, wherein the core braid KG surrounds several core twists KZW as core inserts, and with a spliced rope end, wherein the rope end consists of a first rope section SAS1, a second rope section SAS2 and an eye A, wherein in the first rope section SAS1, at a crossing point K1, some of the core twists KZW are led out of the interior of the core braid KG and are led back along the outgoing sheath section SM' and over the eye A to the beginning of the second rope section SAS1, where they are folded over at a second crossing point K2 and emerge from the returning sheath section SM'' and run parallel over the entire second rope section SAS2 between the outgoing sheath section SM' and the returning sheath section SM'' be conducted. Core shell after Claim 1 , characterized in that the core insert comprises 1-6 core twists KZW. Kernmantel rope according to one of the preceding claims, characterized in that the rope diameter is 8-12 mm. Kernmantel rope according to one of the preceding claims, characterized in that the rope sheath SM has between 16 and 48 sheath yarns MG. Kernmantel rope according to one of the preceding claims, characterized in that the first rope section SAS1 is approximately 33 cm. Kernmantel rope according to one of the preceding claims, characterized in that the second rope section SAS2 is approximately 12 cm. Kernmantel rope according to one of the preceding claims, characterized in that the kernmantel rope consists of synthetic fibers, e.g. polyester or polyamide. Kernmantel rope according to one of the preceding claims, characterized in that the diameter of the kernmantel rope in the second rope section SAS2 increases by less than 5% compared to the first rope section SAS1.

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