KR100991601B1 - Endless rope - Google Patents

Abstract

The present invention relates to an endless rope (10),

The endless rope 10 comprises a first strand 12 and the first strand 12 comprises a second strand 14 laid-up and stacked. Second strand 14 comprises rope yarn 16,

The first strand 12 is stacked from three, four or six second strands 14 and the rope 10 comprises splices in at least all of the first strands 12. The rope 10 is laminated from three first strands or four first strands, or one core first strand and six peripheral first strands 12 or alternatively eight or twelve first strands ( 12) characterized by braiding (braiding) from.

Description

Endless rope {ENDLESS ROPE}             

The present invention relates to an endless rope comprising a first strand, wherein the first strand comprises a second strand that is laid up and wherein the first strand is laminated. 2 strands comprise rope yarns.

Rope structures for making endless ropes are known from US-A-5901632, which is braided consisting of a braided primary strand, the braided first strand consisting of rope yarns. ropes are described. From this an endless rope can be produced by making a splice on the braided first strand when the reel of the braided first strand is emptied during the manufacture of the rope.

In addition, ropes comprising a first strand, wherein the first strand comprises a second strand and the second strand comprises a rope yarn, are known from US-A-4,170,921. The document describes a double braided rope consisting of a braided core and a braided cover, wherein the core or cover rope comprises a first strand, The first strand consists of several second strands, the second strands consisting of twined rope yarns, the first strands bundling several second strands together in a substantially parallel position. It is made by bundling. The rope can generally be produced quickly.

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However, a disadvantage of the rope is that it cannot be used for infinite rope manufacture. In the rope manufacture, when the reel with the first strand is emptied, there is no possibility of connecting the first strand to the first strand of the next reel without significant loss of strength.

It is an object of the present invention to provide an endless rope.

In the rope according to the invention, it can be achieved if the first strand is laminated with three, four or six second strand yarns and the rope comprises splices on at least all the first strands. Found.

The advantage of the rope according to the invention over the rope of US-A-5901632 is that the rope according to the invention can be produced quickly, has a higher strength and is easier to splice.

By means of the above, the endless rope can be made as further described below.

 Ropes made in several stages contain several structural elements. Examples of the above are yarns composed of twined or non-twined filaments, or strands or combinations thereof, which may be laminated or braided yarns, or thinner strands. Can be.

In the rope according to the invention, the first strands can be braided together or stacked on one another.

When the ropes are stacked, the ropes are preferably stacked from three first strands, or four first strands, or one core first strand and six peripheral first strands.

If the rope is braided, the rope is preferably braided from eight or twelve first strands.

In the rope according to the invention, the first strand is laminated from three, four or six second strands.

Generally, depending on the size of the rope finally obtained, the second strand comprises several twined rope yarns that can be divided into several layers of the strands.

The rope yarns of the rope according to the invention comprise several fibers. The fibers in the rope yarns can be smooth or twined.

If both continuous structural elements comprise a twist, the twist direction is preferably opposite to the continuous structural element.

An advantage of the rope according to the invention is the fact that if some strands are damaged during the use of the rope, it can be regenerated without having to tear off the whole rope. The rope according to the invention also has better wear resistance than known ropes.

A problem associated with endless rope manufacture is that the diameter of the reel carrying the first strand is limited, so that the wound-up length of the first strand is constrained and the reel is emptied during the manufacture of the rope. In the current production of endless ropes, the tail end of the first strand on the reel to be emptied must be connected to the lead end of the second strand on the new reel.

This can be done simply with the rope of the present invention by applying the current standard splice technique by splicing the tail of the first strand to the head of the second strand. By making the splice at successive points on each first strand, infinite ropes can be produced without significant loss of rope strength.

Ropes having a diameter of at least 20 mm are made from strands consisting mainly of yarns made of several layers. Strands generally consist of a core consisting of, for example, three rope yarns around several layers of multiple rope yarns. In the strand, splices cannot be made. The length of the rope thus depends on the volume of the reel on the stacked rope-laying machine or on the volume of the braiding bobbin on the braided rope braiding machine. Therefore limited.

A particular advantage of the rope according to the invention is that the rope thickness does not impose any limit on the rope length because splices can be made. Accordingly, the present invention relates to an endless rope, preferably having a diameter of at least 20 mm. The length of the endless rope is at least 250 meters, preferably at least 1000 meters.

1 shows one of the embodiments of a rope according to the invention, wherein the rope is a rope 10 braided into 12 strands, the rope being laminated into four strands with S-twist Consisting of a first strand 12. The first strand consists of a second strand 14 stacked with rope yarns 16 in the form of a Z-twist. Usually half of the strand is composed of S-twist and the other half is composed of Z-twist.

In making the rope, the rope yarns 16 can be twinned from the fiber bundles with the aid of a standard twining machine. The second strand 14 is then laminated from several rope yarns on a strand bench in a twisting direction opposite to the twisting direction in the rope yarns. The first strand 12 is formed by stacking four of the strands. The twelve first strands are then braided to form a rope 10. This is done on a braiding machine with twelve reels filled with first strands. If one of the reels is emptied, it can be made by connecting the tail of the first strand on the empty reel to the head of the second first strand on a full reel and replacing the empty reel with a full reel. Linking two strand ends is, for example, spliced according to the known method described in The Splicing Handbook, "Techniques for Modern and Traditional Ropes", by Barbara Merry with John Darwin, ISBN 0-87742-952-9. This can be done by applying rice.

Another more preferred method is the following method:

a) dividing one end of the first first strand end into a first part and a second part each comprising a second strand of a first number and a second strand of a second number, wherein the first part is at least one second part; 2 strands);

b) inserting the first part from one side at an opening in the second first strand, the opening having a second strand of a first number on one side and a second strand of a second number on the other side, the first And the second number is at most one difference); And

c) inserting the second portion from the other side into the opening in the second first strand.

Repeat steps b) and c) at least three times, for example four times, whereby the first part and the second part intersect once with at least all the second strands of the second first strand and the first part and the second part each last. Each opening of the second first strand end is separated to leave the second first strand at the opening.

In this method, one end of the first first strand is divided into a first part and a second part, wherein the first part and the second part each include a first number and a second number of the second strand, and the first part is more than 1 Has more than one strand. This means that the first strand of three strands is divided into a first portion having two second strands and a second portion having only one second strand. The first strand of four strands is divided into two parts of two second strands, and the first strand of six strands is divided into two parts of three strands.

When the first first strand and the second first strand each have three strands, the opening has two strands on one side and one strand on the other side. If the first rope and the second rope have four or six strands, the openings have two or three strands on each side.

The second part fits from the other side in the opening in the second first strand, which means that two parts of the first first strand are fitted in different directions through the opening in the second first strand.

Repeat steps b) and c) three or more times, each opening crossing the first portion and the second portion once with at least all the second strands of the second first strand, the first portion and the second portion respectively the second from the last opening. It is separated by leaving the first strand. The order of repeating steps b) and c) is not critical to the efficiency of the splice obtained.

The advantage of the splice is that the splice is produced more quickly in this way.

The rope can be made of other yarns. Suitable yarns are "High Modulus PolyEthylene (HMPE)" such as polyester, nylon, polyethylene, polypropylene, aramid, polybenzoxazole (PBO) and Dyneema (trade name) or Spectra (trade name). to be.

The endless rope according to the invention preferably comprises HMPE yarns.

The invention will be further illustrated by the following non-limiting examples and comparative experiments (first strands are laminated and braided, respectively).

Example I

The rope 1 was made from laminated strands (3 × 1 laminated length 34 mm, weight 4.27 g / m (8/1760 dTex Dynema SK-75)). The breaking strength of the strand is 10797 N.

In a Latera braider the strands were made of rope braided into 12 strands with a braided length of 8 × diameter. The rope weighs 54.6 g / m. The breaking strength of the rope is 77820 N.

Comparative Experiment A

The rope 2 was made from braided strands [8 × 1 (3/1760 dTex Dynema SK-75) weighing 12 picks per 10 cm and weighing 4.37 g / m. The breaking strength of the strand is 9670 N.

In a laterra blader the strands were made of 12 strands of braided rope with a braided length of 8 × diameter. The rope weighs 56 g / m. The breaking strength of the rope is 61740 N.

The strand strength of the laminated structure therefrom appears to be at least about 15% higher than the strand strength of the braided structure.

Although the strand strength of the laminated structure is only at least 15% higher than the strand strength of the braided structure, surprisingly the strength of the rope made therefrom is at least 26% higher than the strength of the rope made of the braided structure. In addition, the stretch of the braided structure with the braided strands is significantly higher than in the case of laminated strands.

Example II

In rope 1, standard splices were made as described in The Splicing Handbook, "Techniques for Modern and Traditional Ropes", by Barbara Merry with John Darwin, ISBN 0-87742-952-9.

The splice is impregnated with a coating (LAGO 50, GOVI, Belgium), which makes it possible to use shorter splice lengths than for uncoated splices in dyneema ropes.

In rope 1, two types of end connections were tested as follows:

i) Splicing together the two strand ends to be joined having a total of 24 tucks, tapered to the last three. The breaking strength of the rope with the splice is 67990 N. If the number of turks is 27 and the last three taper, the breaking strength is 81660 N.

ii) Two loops connected to each other were prepared by splicing back to each of the two strand ends, with 16 turks. The above breaking strength is 70550 N.

This means that if a spliced-in connection is performed optimally, i.e. when a sufficient number of turks are made, the spliced connection will not cause a loss of strength in the spliced-up strand. Shows no.

However, the use of loops for connection leads to a loss of breaking strength, which prevents the braiding of structures made from twelve strands which are unacceptable from the point of use of the braid.

Claims (6)

As an endless rope 10 comprising a primary strand 12, The first strand 12 comprises a second strand 14 laid-up, the stacked second strand comprises a rope yarn 16, Infinite rope (10), characterized in that the first strand (12) is stacked from three, four or six second strands (14), and the rope comprises splices in at least all the first strands. The method of claim 1, Infinite rope characterized in that it is laminated from three first strands, or four first strands, or one core first strand and six peripheral first strands. The method of claim 1, Infinite rope characterized in that it is braided from eight or twelve first strands. 4. The method according to any one of claims 1 to 3, Infinite rope characterized by comprising a high modulus polyethylene (HMPE) yarn. 4. The method according to any one of claims 1 to 3, An endless rope, characterized in that the diameter of the rope is 20 mm or more. The method of claim 5, Infinite rope, characterized in that the length of the rope is more than 1000 meters.

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