WO2011071387A1 - Corde comprenant un œil épissé, procédé correspondant de formation d'un oeil et utilisation de la corde - Google Patents
Corde comprenant un œil épissé, procédé correspondant de formation d'un oeil et utilisation de la corde Download PDFInfo
- Publication number
- WO2011071387A1 WO2011071387A1 PCT/NL2010/050843 NL2010050843W WO2011071387A1 WO 2011071387 A1 WO2011071387 A1 WO 2011071387A1 NL 2010050843 W NL2010050843 W NL 2010050843W WO 2011071387 A1 WO2011071387 A1 WO 2011071387A1
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- WIPO (PCT)
- Prior art keywords
- rope
- strand
- yarns
- jacket
- portions
- Prior art date
Links
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Classifications
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/18—Grommets
- D07B1/185—Grommets characterised by the eye construction
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/18—Grommets
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
- D07B1/148—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising marks or luminous elements
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
- D07B7/16—Auxiliary apparatus
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
- D07B7/16—Auxiliary apparatus
- D07B7/18—Auxiliary apparatus for spreading or untwisting ropes or cables into constituent parts for treatment or splicing purposes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/24—Ropes or cables with a prematurely failing element
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2001—Wires or filaments
- D07B2201/2009—Wires or filaments characterised by the materials used
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2083—Jackets or coverings
Definitions
- the invention relates to a rope having an eye, the rope comprising a first rope portion and a second rope portion that are spliced into each other for forming a spliced connection for obtaining the eye.
- the invention also relates to a method of forming an eye in a rope.
- the invention further relates to use of 5 a rope.
- Such ropes having an eye are used in many industrial fields. By for example arranging the eye around a pillar or a hook or bollard that is attached to an object, a towing force can be exerted on the object.
- Ropes with an eye are frequently used in maritime applications, such as for towing or anchoring of
- the rope can hardly be used for towing or anchoring.
- Obtaining the eye is a classic art wherein the second rope portion is formed from an end of the rope and the first rope portion is located at a distance from the end of the rope, measured along the rope. The second rope portion is then spliced in
- the first and second rope portion then approximately equals the circumference of the eye.
- the spliced connection can wear out rapidly and may damage. Ultimately this may lead to failure of the connection, which can give rise to dangerous
- the invention provides a rope having an eye, the rope comprising a first rope portion and a second rope portion that are spliced into each other for forming a spliced connection for obtaining the eye, wherein the first rope portion and the second rope portion are formed from an end portion of the rope.
- a spliced connection can be obtained that has a reduced thickness compared to known prior art ropes.
- a thinner spliced connection significantly decreases a vulnerability of the rope for damage e.g. due to grinding. For a relatively thick spliced connection a chance to grind against other objects is relatively high.
- the relatively thick spliced connection of known prior art ropes forms a rather stiff part of the rope. Without the relatively thick spliced connection of known prior art ropes, a handling flexibility of the rope may be increased.
- splicing' may comprise a broad range of methods, which may be known as such, of interconnecting the first and second rope portion to each other, such as weaving, braiding, twisting, sliding, and the like.
- splicing may comprises weaving and/or braiding the first and second rope portion into each other.
- Such splicing may enable forming a relatively strong spliced connection.
- Patent application EP 0 012 406 shows a rope having an eye that is formed by means of clamps. In the rope described by EP 0 012 406, the clamps are needed for fixing rope ends that are partly winded around each other.
- the first and second rope portion are formed from an end portion of the rope. This means that, before splicing, the first rope portion and the second rope portion may terminate at a rope end.
- the rope may extend from the first rope portion in only one direction along the rope and may be discontinued in the other direction along the rope.
- the rope may extend from the second rope portion in only one direction along the rope and may be discontinued in the other direction along the rope.
- the first rope portion and the second rope portion are located approximately in parallel along the rope.
- a terminating part of the eye comprises the first and second rope portion.
- the spliced connection extends along at least part of the eye. This can be achieved for example by directing the first rope portion and the second rope portion in different directions along the eye. In this way a rather smooth eye can be obtained, while the relatively thick spliced connection can be prevented.
- the first rope portion and the second rope portion can be directed in substantially the same directions along the eye.
- the spliced connection extends along the at least part of the eye at least between mutually opposing parts of the eye.
- an imaginary straight line from the first rope portion to the second rope portion may cross a region outlined by the eye.
- the spliced connection may extend from one of the mutually opposing parts to the other one of the mutually opposing parts.
- the spliced connection has a curved shape. In this embodiment, a length of the spliced connection is extended so that a strength of the spliced connection may be increased.
- the spliced connection extends along substantially the whole eye. In this way a thickness of the eye is
- the way the rope parts shoot away after failure is considered more favourable. It is therefore expected that an amount of the accidents can be reduced when using the rope of this embodiment. More in particular, in the tests failure often occurred in one of the eye branches relatively close to a branching point from which the two eye branches emanate out of a base part of the rope. Then, after failure, the failed branch of the eye may shoot away around a pillar around which the eye was arranged before failure. This is believed to release a significant amount of energy before the failed rope shoots back towards to other end of the rope, thereby reducing the energy amount in the failed rope. As a result, the base part of the rope may shoot away less violently which may reduce the amount and/or severance of accidents.
- the first rope portion is approximately equal to the second rope portion.
- a length of the first rope portion may be approximately equal to the second rope portion
- a tensile strength of the first rope portion may be approximately equal to the second rope portion
- a thickness and/or cross section of the first rope portion may be approximately equal to the second rope portion
- a composition of the first rope portion may be approximately equal to the second rope portion.
- a thickness and/or cross section of the first rope portion and the second rope portion may be approximately equal and/or similar. It may be clear that the thickness and/or cross section of the first rope portion and the second rope portion may be approximately equal and/or similar when the first rope portion and the second rope portion are spliced into each other. Said thickness of the first rope portion may be defined by a maximum distance between outer parts of the first rope portion with the first rope portion and the second rope portion being spliced into each other, said distance being measured in a direction perpendicular to a direction along which the spliced connection extends.
- Said thickness of the second rope portion may be defined by a maximum distance between outer parts of the second rope portion with the first rope portion and the second rope portion being spliced into each other, said distance being measured in a direction perpendicular to a direction along which the spliced connection extends. It may be clear that, when the cross section of the first rope portion and the second rope portion are approximately equal and/or similar, a total area of the first rope portion along a plane of the cross- section and a total area of the second rope portion along a plane of the cross-section may be approximately equal and/or similar.
- a distribution and/or pattern of the first rope portion along a plane of the cross-section and a distribution and/or pattern of the second rope portion along the plane of the cross-section may be approximately equal and/or similar.
- Said plane of the cross-section may be perpendicular to a direction along which the spliced connection extends at a position of the cross-section.
- the first rope portion may be different from the second rope portion.
- the first rope portion may have a thickness and/or strength that is different from a thickness and/or strength of the second rope portion.
- Such an embodiment may offer the advantage that an eye branch where failure occurs may be predicted. In this way, a direction in which the parts of the rope shoot away after failure can be better predicted. This may improve safety of the user of the rope.
- the rope and/or the eye may comprise an indication which is the weaker and/or stronger branch of the eye.
- the rope and/or the eye may comprise an indication of an expected direction in which the rope parts shoot away after failure.
- the rope may optionally be provided with a plurality of strands.
- Each strand of the rope may e.g. contain a plurality of yarns that extend along a length of the strand.
- a strand may comprise multiple yarns.
- a yarn may comprise multiple fibers.
- the fibers can e.g. be made from natural and/or synthetic material.
- the strands may for example be braided, woven, twisted, substantially parallel or otherwise interconnected, resulting in e.g. a twisted or braided rope.
- a single strand itself may comprise multiple substrands itself that can be braided or twisted or substantially parallel or woven or otherwise interconnected as well, e.g. resulting in a plaited rope.
- a single strand itself may comprise yarns that can be braided or twisted or woven or otherwise interconnected to form the strand.
- a rope may also be a non-stranded rope, i.e. may comprise yarns not forming strands. The yarns then may be braided, twisted, woven, substantially parallel or otherwise interconnected.
- the rope provided with a plurality of strands may comprise a core that extends along a length of the rope.
- the strands may surround the core of the rope.
- the yarns may be arranged around the core. It may be clear that the invention is not limited to these types of ropes and many other types of ropes and/or combinations of yarns and/or strands are possible.
- the first and the second rope portion may comprise strand portions as well.
- Strand portions comprised by the first rope portion may be spliced into strand portions comprised by the second rope portion and/or vice versa to form the spliced connection.
- a strand portion comprised by e.g. the first rope portion may be spliced into a strand portion comprised by the second rope portion, such that a spliced
- subconnection is formed in the strand portions. This way, multiple spliced subconnections may be formed for obtaining the eye.
- the yarns at the end portion of the rope may be e.g. arranged in strands before forming a spliced connection.
- an optimal construction may be provided for forming an optimal spliced connection.
- an optimal construction may be provided when the rope is a stranded rope.
- the strands can be disentangled and a new construction of strands and/or different strands may be provided.
- multiple strands may be assembled to form larger strands for forming the spliced connection.
- the person making the spliced connection is not limited anymore to the construction of the rope itself, but can make its own construction for an optimal spliced connection.
- the strands and/or yarns By interconnecting the strands and/or the yarns and thus forming the spliced connection, preferably by weaving and/or braiding the strands and/or the yarns into each other, the strands and/or yarns can be stuck to each other thus forming a firm and stable connection.
- the first rope portion has at least one first strand portion and the second rope portion has at least one second strand portion that preferably is distinct from the at least one first strand portion.
- the terms 'first strand portion' and 'second strand portion' may refer to strand portions comprised by respectively the first rope portion and the second rope portion.
- the first strand portion and the second strand portion are portions of mutually distinct strands.
- the second strand portions comprised by the second rope portion and the first strand portions comprised by the first rope portion are spliced into each other for forming the spliced connection.
- a part of the second strand portions of the second rope portion may be spliced in a part of the first strand portions of the first rope portion, and a remaining part of the first strand portions of the first rope portion may be spliced in a remaining part of the second strand portions of the second rope portion, to obtain the spliced connection.
- the second strand portions of the second rope portion may be spliced in the first strand portions of the first rope portion, or vice versa.
- a total amount of the first strand portions of the first rope portion is approximately equal to a total amount of the second strand portions of the second rope portion. This may improve the symmetry of the eye. In this way a distribution of mechanical stress inside the eye during use of the rope may be more even. This may improve a strength of the eye.
- the rope is provided with a jacket that comprises yarns.
- a jacket is known as such.
- the jacket may provide protection to an inner part of the rope and/or may add to a strength of the rope.
- a first portion of the yarns of the jacket is provided around the first rope portion and a second portion of the yarns of the jacket is provided around the second rope portion.
- the yarns of the jacket may add to the strength of the rope in the first and second rope portion.
- the jacket may have to be cut to be able to splice the second rope portion in the first rope portion. Such cutting may cause a loss of strength of the rope as the jacket may not add to the strength of the rope.
- the jacket may add to the strength of the rope. Since the jacket may add to the strength of the rope, a thinner rope may be used for obtaining the same or a similar strength as a thicker conventional prior art rope, thereby possibly reducing material and/or production costs.
- the first portion of the yarns of the jacket is only provided around the at least one first strand portion of the first rope portion.
- the second portion of the yarns of the jacket is only provided around the at least one second strand portion of the second rope portion.
- the first portion of the yarns of the jacket is provided around the at least one first strand portion of the first rope portion and the second portion of the yarns of the jacket is provided around the at least one second strand portion of the second rope portion.
- the first portion of the yarns of the jacket is
- the first portion of the yarns of the jacket may be provided individually around each first strand portion of the first rope portion, and the second portion of the yarns of the jacket may be provided individually around each second strand portion of the second rope portion. Having the yarns of the jacket distributed approximately evenly in this way may improve the symmetry of the eye and/or the stress distribution in the eye.
- the rope is terminated at opposite end sides by two similarly formed eyes.
- the rope may be connected with one eye to a towboat and at the other end side with the other eye to a cargo ship. Then, both a user of the towboat and a user of the cargo ship may benefit from the rope.
- first rope portion and second rope portion comprise a synthetic material.
- substantially the whole rope is made from synthetic materials. Synthetic materials may combine a relatively high strength with a relatively low weight.
- the invention provides a method of forming an eye in a rope having a first rope portion and a second rope portion, the method comprising splicing the second rope portion and the first rope portion into each other for forming a spliced connection in the rope for obtaining the eye, wherein the first rope portion and the second rope portion are obtained from an end portion of the rope.
- a spliced connection can be obtained that is significantly thinner than would be obtained by using a conventional way of making the eye via a spliced connection.
- a thinner spliced connection significantly decreases a vulnerability of the rope for grinding or other damaging processes. For a relatively thick spliced connection a chance to grind against other objects is relatively high. Additionally, increased stiffness caused by the relatively thick spliced connection of known prior art ropes may be prevented, resulting in increased handling properties.
- the first rope portion and the second rope portion are directed in different directions along the eye.
- the first rope portion and the second rope portion may be directed in approximately the same direction in the spliced connection.
- the first rope portion and the second rope portion are obtained by separating, before splicing, an end portion of the rope into the first rope portion and the second rope portion.
- the first rope portion and the second rope portion are rejoined in the spliced connection.
- the method may be carried out by using a rope that has the first and second rope portion respectively comprised by separate rope branches at the end of the rope. If the rope contains a core, separating the end portion of the rope may include separating the core as well, preferably into two similar core portions. At least part of these core portions may be distributed evenly among the first and second rope portions.
- the method comprises splicing at least one second strand portion of the second rope portion and least one first strand portion of the first rope portion into each other for forming the spliced connection, wherein preferably the at least one first strand portion of the first rope portion is distinct from the at least one second strand portion of the second rope portion.
- Splicing may comprise weaving and/or braiding the strand portions and/or rope portions into each other.
- the method comprises splicing the second strand portions of the second rope portion in the first strand portions of the first rope portion for forming the spliced connection.
- splicing the second strand portions of the second rope portion in the first strand portions of the first rope portion for forming the spliced connection.
- more than one, such as three, eight, or twelve, strand portions per rope portion for splicing enables the formation of a rather strong spliced connection.
- the method comprises releasing at least a first portion of the yarns of the jacket and releasing at least a second portion of the yarns of the jacket over an end portion of the rope, and providing the first portion of the yarns of the jacket around the first rope portion and providing the second portion of the yarns of the jacket around the second rope portion.
- breaking or cutting of the yarns of the jacket is preferably prevented. In this way, after providing the first and second portions of the yarns of the jacket around the first and second strand portions, the yarns of the jacket can optimally contribute to a strength of the eye.
- the method comprises releasing the at least first portion of the yarns of the jacket and releasing the at least second portion of the yarns of the jacket, and providing the first portion of the yarns of the jacket around the at least one first strand portion of the first rope portion and providing the second portion of the yarns of the jacket around the at least one second strand portion of the second rope portion.
- the yarns of the jacket may then be divided in a first portion and a second portion.
- the first portion of the yarns of the jacket may be arranged around the first rope portion. If the first rope portion comprises portions of multiple strands, the first jacket portion may be, e.g. approximately evenly, distributed over the strands.
- the yarns of the jacket may add to the strength of the rope and/or the eye.
- the method comprises providing the first portion of the yarns of the jacket individually around each first strand portion of the first rope portion, and providing the second portion of the yarns of the jacket individually around each second strand portion of the second rope portion.
- each strand portion may be surrounded with yarns from the jacket such that a single strand portion may be jacket-like covered.
- the second jacket portion may be distributed in a similar way over the second rope portion.
- the jacket-like covered strand portions from the first and second rope portion may be spliced into each other to form the spliced connection. Since the strand portions in the spliced connection are covered with yarns from the jacket, the jacket may add to the strength of the eye and/or the rope.
- the method comprises providing a cover over at least part, and preferably the whole, of the spliced connection. In this way the spliced connection can be protected so that its lifetime may be improved.
- the cover is applied tightly so that it pushes the first and second rope portion together.
- This may increase a strength of the spliced connection.
- the first and second rope portion comprise yarns that may be approximately parallel, and the spliced connection is formed by sliding the yarns with respect to each other in opposite directions.
- Figure 1A shows a rope that has a first rope portion and a second rope portion, illustrating a first embodiment of a method of forming an eye in a rope according to the invention
- Figure IB illustrates separating an end portion of the rope into the first rope portion and the second rope portion, illustrating the first
- Figure 1C shows an example in which rope branches comprise twisted strand portions
- Figure ID shows another example in which rope branches comprise braided strand portions
- Figure IE shows bringing the first rope portion and the second rope portion together, illustrating the first embodiment of a method of forming an eye in a rope according to the invention
- Figure IF illustrates a second way of splicing the first and second rope portion into each other, which may be used in the first method
- Figure 2 shows a rope having an eye in a first embodiment according to the invention
- Figure 3A shows a rope that may be obtained after releasing at least a first portion of yarns of a jacket and releasing at least a second portion of the yarns of the jacket;
- Figure 3B shows a rope that may be obtained after separating an end portion of the rope into a first rope portion and a second rope portion;
- Figure 3C shows a rope wherein first and second strand portions are individually covered by respectively the first and the second portion of the yarns of the jacket;
- Figure 4A illustrates a third embodiment of a method of forming an eye in a rope according to the invention.
- Figure 4B shows a plurality of spliced subconnections.
- Figures 1A-F illustrates a first embodiment of a method of forming an eye 2 in a rope 4 according to the invention, referred to as the first method.
- Figure 1A shows the rope 4 that has a first rope portion 8 and a second rope portion 10, to be spliced into each other.
- the first rope portion 8 has at least one first strand portion
- the second rope portion 10 has at least one second strand portion (examples of the first and second strand portions are shown in figures 3A-C and 4A-4B with respectively reference number 26A and 26B).
- the at least one second strand portion may be distinct from the at least one first strand portion.
- a second strand portion of the second strand portions and a first strand portion of the first strand portions may not be a portion of one and the same strand.
- the first rope portion and the second rope portion comprise portions of the same strands.
- the strands that are present in the first rope portion continue along the rope over the distance between the first and the second rope portion and are thus also present in the second rope portion.
- the first rope portion 8 and the second rope portion 10 are obtained from an end portion 14 of the rope 4.
- the end portion 14 typically extends from an end 12 of the rope 4 along the rope 4 until the first rope portion 8 and the second rope portion 10 end.
- the first and second rope portion 8, 10 may end at a position 16 that approximately coincides with a branching point 32 of the rope.
- the first and second rope portion 8, 10 may end at another position 16' along rope branches 33 of the rope spaced apart from the branching point 32.
- the end portion 14' corresponding with the latter situation is shown as well in figure 1A.
- the first method may comprise separating the end portion 14 of the rope into the first rope portion 8 and the second rope portion 10. This is illustrated in figure IB. Such separating may comprise unwinding or disentangling strand portions and/or yarns of the end portion 14. If the rope 4 has a core, an example of which is shown in figure 3B with reference number 30, such separating may include separating the core as well. However, the first method may also lack separating the end portion 14, for example when the first method starts from a rope that is already provided with the rope branches 33.
- Each one of the rope branches 33 may comprise strand portions, as e.g. indicated in figures IC and ID.
- Figure IC shows an example in which each one of the rope branches 33 comprises twisted strand portions.
- Figure ID shows another example in which each one of the rope branches 33 comprises braided strand portions.
- one of the rope branches 33A may comprise twisted strand portions and another one of the rope branches 33B may comprise braided strand portions (as shown in figure IF).
- the first method further comprises splicing, after the optional separating, the second rope portion 10 and the first rope portion 8 into each other.
- Such splicing may comprise bringing the first rope portion 8 and the second rope portion 10 together.
- Such bringing together is indicated by arrows 15 in figure IE.
- the term 'first strand portion' may thus refer to a portion of a strand that is to be located or is located in the spliced connection.
- the term 'second strand portion' may thus refer to a portion of a strand that is to be located or is located in the spliced connection.
- the second strand portions of the second rope portion 10 may be spliced in the first strand portions of the first rope portion 8 for forming a spliced connection (not shown in figures 1A-F but shown in figure 2 with reference number 17), preferably by weaving and/or braiding the portions into each other.
- This may comprise, prior to splicing, providing the first rope portion 8 in a braided or twisted configuration, as shown in figures 1C and ID.
- This may further comprise, prior to splicing, providing the second strand portions of the second rope portion 10 in a disentangled state (not shown in figures 1C and ID).
- the disentangled second strand portions of the second rope portion 10 can be spliced in the braided or twisted first rope portion 8.
- the second rope portion may be approximately completely
- splicing may comprise weaving and/or braiding the first and second rope portion into each other.
- Figure IF illustrates a second way of splicing the first and second rope portion into each other, which may be used in the first method.
- a part 10A the second rope portion 10 may be spliced in a part 8A of the first rope portion 8, preferably by weaving and/or braiding the parts into each other.
- a remaining part 8B of the first rope portion may be spliced in a remaining part 10B of the second rope portion. This may comprise, prior to splicing, providing the part 8A of the first rope portion and the remaining part 10B of the second rope portion in a braided or twisted configuration.
- This may further comprise, prior to splicing, providing the part 10A of the second rope portion and the remaining part 8B of the first rope portion in a disentangled state, e.g. in an unbraided and untwisted state. Then, the disentangled part of the second strand portions of the part 10A of the second rope portion 10 can be spliced in the braided or twisted part 8A of the first rope portion 8. Then, also the disentangled part of the first strand portions of the remaining part 8B of the first rope portion may be spliced in the braided or twisted remaining part 10B of the second rope portion. It may thus be clear that splicing may comprises weaving and/or braiding the first and second rope portion into each other.
- a part of the first strand portions comprised by the part 10A of the second rope portion and a part of the second strand portions comprised by the remaining part 8B of the first rope portion may be mutually separated, i.e. untwisted and unbraided.
- a length of the part 10A of the second rope portion and a length of the part 8A of the first rope portion are approximately equal to a length of the remaining part 8B of the first rope portion and a length of the remaining part 10B of the second rope portion. This is however not necessary.
- the first strand portions and the second strand portions may be arranged in a uniform pattern.
- Such splicing is known as such and may be considered as interconnecting a second rope portion with a first rope portion, by weaving and/or braiding.
- splicing may include guiding a single second strand portion through spaces between the first strand portions while, possibly repeatedly, crossing one or more of the first strand portions. Such guiding may be carried out for each one of the second strand portions.
- Each one of the second strand portions may be guided through a distinct sequence of spaces between the first strand portions.
- each second strand portion may follow a different trajectory through the first rope portion 8 than the other second strand portions.
- splicing may include guiding a single first strand portion through spaces between the second strand portions while, possibly repeatedly, crossing one or more of the second strand portions.
- splicing may comprise weaving and/or braiding the first and second rope portion into each other.
- the spliced connection 17 may be formed by splicing mutually separated first and second rope portions 8, 10 terminating in the rope end 12 into each other.
- the first and second rope portions 8, 10 in general may have a thickness less than the original rope thickness, the spliced connection can be thinner than for known prior art ropes.
- the first and second rope portion 8, 10 may be obtained by longitudinally separating the rope 4 from its end 12 along the end portion 14, the spliced connection that extends along the eye 2 may even have a thickness Wi being similar to the original rope thickness W2, i.e. the thickness of a base part 25 of the rope 4 (figure 2).
- a splicing pattern of the first strand portions and the second strand portions in the spliced connection 17 may be different from a pattern, e.g. a braiding or twisting pattern that strands, of which the first and second strand optionally are a portion, have in the base part 25 of the rope 4 .
- the strands each comprising one of the first rope portions and the strands each comprising one of the second rope portions may be mutually interconnected in the spliced connection 17 differently than in the base part 25 of the rope 4.
- a method according to the invention may include optimizing a strength of the eye by varying the splicing pattern of the first and second rope portion, e.g. the splicing pattern of the first and second strand portions, in the spliced connection 17. During such optimizing, the base part 25 may be left substantially unchanged.
- Figure 2 shows a rope 4 having an eye 2 in a first embodiment according to the invention.
- the rope in the first embodiment can be obtained.
- the first rope portion 8 extends in a first direction 18 along the spliced connection 17 and the second rope portion 10 extends along a second direction 20 along the spliced connection 17.
- the first rope portion 8 and the second rope portion 10 extend in different, for example mutually opposite, directions along the spliced connection 17. It may be clear that the first and second directions 18, 20 are evaluated along a total length of the spliced connection 17.
- a terminating part 34 of the eye 2 comprises both the first rope portion 8 and the second rope portion 10.
- the second rope portion 10 and the first rope portion 8 are spliced into each other for forming the spliced connection 17 for obtaining the eye 2, wherein the first rope portion 8 and the second rope portion 10 are formed from the end portion 14 of the rope.
- the spliced connection 17 extends along at least part of the eye 2. Variations can be obtained depending on how far the spliced connection 17 extends along the eye 2.
- the spliced connection 17 may at least extend along the eye 2 between mutually opposing parts 19A, 19B of the eye. An example of such mutually opposing parts 19A, 19B is shown in figure 2.
- An imaginary straight line 38 may cross a region 40 outlined by the eye 2.
- the spliced connection 17 may extend from one of the mutually opposing parts to the other one of the mutually opposing parts. It may be clear that parts 21A, 2 IB of the eye along which the spliced connection 17 does not extend may have a thickness W.3 that is smaller than the thickness W2 of the base part 25 of the rope 4.
- the spliced connection 17 may extend along substantially the whole eye. This can be obtained by minimising, e.g.
- the spliced connection 17 may extend until the branching point 32 and/or the base part 25 of the rope. This can be obtained by choosing in the first method the position 16 at which the first and second rope portion 8, 10 end adjacent to, e. g. approximately coinciding with, the branching point 32.
- the example wherein the spliced connection 17 extends along substantially the whole eye is considered advantageous as an optimal strength of the eye can be obtained in this way.
- branching point 32 of the rope 4 may be considered as distinguishing the base part 25 of the rope from the eye 2 of the rope.
- the first rope portion 8 is approximately equal to the second rope portion 10. This may for example be obtained by having a total amount of the first strand portions of the first rope portion 8 approximately equal to a total amount of the second strand portions of the second rope portion 10. In this way, in use of the rope 4, stress within the eye may be more evenly distributed among the first and second rope portion 8, 10. In this way a strength of the eye may be improved.
- the total amount of the first strand portions of the first rope portion 8 may for example be in a range from three to twelve, for example three, six, or twelve. Alternatively, the total amount of first strand portions of the first rope portion 8 may be smaller than three or larger than twelve.
- splicing the second rope portion 10 and the first rope portion 8 into each other may e.g. comprise twisting the first strand portion of the first rope portion 8 and the second strand portion of the second rope portion 10 into each other.
- the first strand portion may comprise a plurality of first yarns and the second strand portion may comprise a plurality of second yarns.
- splicing the second rope portion 10 and the first rope portion 8 into each other may comprise sliding of the first yarns and second yarns with respect to each other.
- a bundle of yarns may be obtained wherein the first yarns and the second yarns are rather uniformly distributed.
- Figures 3A-C illustrates a second embodiment of a method of forming an eye 2 in a rope 4 according to the invention, referred to as the second method.
- the rope 4 is provided with a jacket 22 that comprises yarns 24.
- the second method may comprise the step of releasing at least a first portion 24A of the yarns 24 of the jacket and releasing at least a second portion 24B of the yarns of the jacket. After such releasing, a rope depicted in figure 3A may be obtained.
- the second method may further comprise separating the end portion
- the rope 4 shown in figure 3B may be obtained.
- the first rope portion 8 comprises three first strand portions 26A
- the second rope portion 10 comprises three second strand portions 26B.
- the first rope portion 8 may be approximately equal to the second rope portion 10, as here a total amount of strand portions in the first rope portion 8 equals a total amount of strand portions in the second rope portion 10.
- each first strand portion 26A may comprise a plurality of first substrand portions.
- each second strand portion 26B may comprise a plurality of second substrand portions.
- a single strand may comprise multiple strands, i.e. substrands, itself.
- the term 'first substrand portion' thus may refer to a portion of a substrand.
- the term 'second substrand portion' may refer to a portion of another substrand.
- the first substrand portions of one first strand portion may be mutually braided or twisted or otherwise interconnected.
- the second substrand portions of one second strand portion may be mutually braided or twisted or otherwise interconnected. This may hold for each first strand portion and each second strand portion.
- Substrands may be provided approximately in parallel within the base part 25 of the rope 4.
- the first substrand portions may be arranged into first strand portions, and the second substrand portions may be arranged into second strand portions.
- the first strand portion may comprise most of, e.g. all of, its strand.
- the second strand portion may comprise most of, e.g. all of, its strand.
- a multitude of variations is possible for arranging the first and second substrand portions in the spliced connection. These variations are substantially independent from a configuration that the strands and substrands have in the base portion 25 of the rope.
- a configuration such as a braiding or twisting pattern
- that strands and/or substrands have in the base part 25 of the rope 4 may be different from a configuration, such as a splicing pattern, of first and second strand portions, and/or first and second substrand portions, in the spliced connection.
- Different configurations of first and second strand portions, and/or first and second substrand portions, in the spliced connection can be tested, so that an optimal strength of the eye can be obtained.
- the core 30 may be included in the rope 4.
- the core may comprise core yarns.
- the first and/or second method may comprise the step of distributing the yarns of the core 30, preferably evenly, among each individual one of the first strand portions and the second strand portions.
- the second method may further comprise providing the first portion 24A of the yarns of the jacket 22 around the first strand portions 26A of the first rope portion 8 and providing the second portion 24B of the yarns of the jacket 22 around the second strand portions 26B of the second rope portion 10.
- the first portion 24A of the yarns of the jacket 22 is approximately equal to the second portion 24B of the yarns of the jacket 22.
- a total amount of yarns of the first portion 24A of the yarns of the jacket 22 may be approximately equal to a total amount of yarns of the second portion 24B of the yarns of the jacket 22.
- the first portion 24A of the yarns of the jacket 22 is provided individually around each first strand portion 26A of the first rope portion 8. That means that one yarn of the first portion 24A of the yarns of the jacket 22 may surround only one of the first strand portions 26A when being provided around that first strand portion 26A.
- the second portion 24B of the yarns of the jacket is provided individually around each second strand portion 26B of the second rope portion 10.
- the rope 4 shown in figure 3C may be obtained, wherein the first and second strand portions 26A, 26B are individually covered by respectively the first and second portion 24A, 24B of the yarns of the jacket.
- the second method may further comprise forming the eye according to the first method by using the rope 4 shown in figure 3C. Then, a rope in a second embodiment according to the invention is obtained.
- the first rope portion 8 and the second rope portion 10 are formed from the end portion 14 of the rope 4.
- the first portion 24A of the yarns of the jacket may be provided individually around each first strand portion 26A of the first rope portion 8.
- the second portion 24B of the yarns of the jacket may be provided individually around each second strand portion 26B of the second rope portion 10. In this way the first and second portions 24A, 24B of the yarns add to a strength of the eye 2. Cutting the jacket for being able to reach the first rope portion when splicing the second rope portion and the first rope portion into each other, may be prevented.
- Figure 4A illustrates a third embodiment of a method of forming an eye 2 in a rope 4 according to the invention, referred to as the third method.
- Figure 4A shows the rope 4 having five first strand portions 26A comprised by the first rope portion 8 and five second strand portions 26B comprised by the second rope portion.
- Each one of the first and second strand portions may comprise a number of first respectively second substrand portions, in this example three mutually twisted first respectively second substrand portions.
- the rope 4 may have the jacket 22.
- the first and second strand portions 26A, 26B may be formed by strands that extend approximately parallel along the rope 4 inside the jacket 22 of the base part 25 of the rope 4, although alternatively they may have a different configuration.
- the first and second substrand portions may be formed by substrand portions that extend inside the jacket 22 approximately parallel along the length of the base part of the rope 4, although alternatively they may have a different configuration.
- the fourth method comprises splicing one of the first strand portions 26 ⁇ . ⁇ and one of the second strand portions 26B.i into each other. This may be carried out for each first strand portion 26A.i and each second strand portion 26 ⁇ . ⁇ . In this way a plurality, in this example five, spliced subconnections 17.i can be obtained, as shown in figure 4B. In this way a rope in a third
- the spliced connection 17 is formed by the spliced subconnections 17.i.
- a cross-sectional area A.i may be associated with a width Wi.i of one of the spliced subconnections 17.i.
- the sum of the area's A.i may be
- the subparts 2lA.i, 21B.i of the eye along which the spliced subconnections 17.i do not extend may be substantially minimised, e.g. may be limited to be substantially equal to zero.
- the spliced connection 17 of the rope in the third embodiment may extend along substantially the whole eye.
- the cover 28 may have one or more functions. First, the cover 28 may provide protection to the spliced connection 17 against mechanical damage. Second, the cover 28 may be provided tightly around the spliced connection 17. In this way, yarns and/or strand portions in the spliced connection 17 can be held together. In this way a mutual resistance of the yarns and/or strand portions in the spliced connection 17 is increased. This is especially useful if in the spliced connection 17 the yarns of the second rope portion are slid into the yarns of the first rope portion 8.
- a method according to the invention may include providing the cover 28 in a collapsed state around one of the rope branches 33 before splicing, and may further include, after splicing, extending the cover 28 over the at least part, and preferably the whole, of the spliced connection 17.
- first, second, and third embodiment of the rope only one end side of the rope 4 is described, at which end side the eye 2, the end 12, and the end portion 14 are located.
- the rope 4 may be provided at its other end side with a similar eye 2.
- the rope 4 may be terminated at opposite end sides by two similarly formed eyes.
- the first and/or second method may comprise forming similar eyes at both end sides of the rope 4.
- Such a two-eyed rope 4 is especially suitable for exerting a force, from a ship to one of another ship, an off-shore platform, and an anchor. Then, the rope is connected to the ship with one eye and is connected to the one of the other ship, the off-shore platform, and the anchor with the other eye.
- the thickness W2 of the base part of the rope 4 may e.g. be in a range between several, e.g. three, and several tens, e.g. thirty, centimeter.
- One or optionally both eyes of the rope 4 may be provided with a socket (not shown but known as such to the skilled person) inside the eye.
- a socket is for example substantially made of a metallic material.
- the rope 4 having the eye 2 may advantageously be provided with the socket.
- the eye 2 formed according to the invention is better shaped at a branching point 32 of the eye 2 for receiving the socket.
- first rope portion 8 and second rope portion 10 may comprise a synthetic material.
- the rope may e.g. be substantially made of the synthetic material.
- Such a material may for example contain polyamide, polyester, polyethylene, polypropylene, high modulus polyethylene,
- the synthetic material may, alternatively or additionally, contain Kevlar and/or Dyneema.
- the jacket 22 and/or the core 30 may for example contain one or more similar synthetic materials. Alternatively or additionally, the jacket, core and strands may comprise mutually different materials.
- the substrands may e.g. themselves comprise strands, i.e. sub- substrands, and/or yarn bundles. These may be employed when forming the spliced connection 17 and possibly when forming one or more, e.g. all, of the spliced subconnections 17.i. These may also be employed for possibly forming sub-subconnections which are comprised by one of the spliced subconnections 17.i.
- first strand portions, first substrand portions, first sub-substrand portions and/or first yarn bundles of the first rope portion 8 and second strand portions, second substrand portions, second sub- substrand portions and/or second yarn bundles of the second rope portion 10 may be spliced into each other for forming the spliced connection 17.
- Optimising the strength of the eye may comprises defining a division of the first rope portion 8 and the second rope portion 10 into first and second strand portions, first and second substrand portions, first and second sub-substrand portions, and/or first and second yarn bundles.
- Such optimising may be substantially independent from a configuration of the base part 25 of the rope.
- a configuration that strands, substrands, sub-substrand, and/or yarn bundles have in the base part of the rope may be different than in the spliced connection 17. All such variations of the rope and the method of forming an eye in the rope are considered to fall within the scope of the present invention.
- the rope may be substantially made of steel instead of the synthetic material.
- the first rope portion and the second rope portion are still considered to be formed from an end portion of the rope.
- the branching region of the rope may be provided with a whipping e.g. to protect the branching point. When around the eye a cover is provided, the cover may be connected to the whipping to form an endless cover over the eye and the branching region.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ropes Or Cables (AREA)
Abstract
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020127017849A KR101830173B1 (ko) | 2009-12-10 | 2010-12-10 | 아이 스플라이스를 갖는 로프, 대응하는 아이 형성 방법 및 그 로프의 이용 방법 |
KR1020187004112A KR101941700B1 (ko) | 2009-12-10 | 2010-12-10 | 아이 스플라이스를 갖는 로프, 대응하는 아이 형성 방법 및 그 로프의 이용 방법 |
EP10803405.9A EP2510149B1 (fr) | 2009-12-10 | 2010-12-10 | CORDE COMPRENANT UN OEIL ÉPISSÉ et PROCÉDÉ CORRESPONDANT DE FORMATION D'UN OEIL |
BR112012014014-0A BR112012014014B1 (pt) | 2009-12-10 | 2010-12-10 | corda tendo um laço e método para formar um laço em uma corda |
US13/514,567 US8955299B2 (en) | 2009-12-10 | 2010-12-10 | Rope having a spliced eye, corresponding method of forming an eye and use of the rope |
US14/582,029 US9856600B2 (en) | 2009-12-10 | 2014-12-23 | Rope having a spliced eye, corresponding method of forming an eye and use of the rope |
US15/857,459 US10669670B2 (en) | 2009-12-10 | 2017-12-28 | Rope having a spliced eye, corresponding method of forming an eye and use of the rope |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2003939 | 2009-12-10 | ||
NL2003939A NL2003939C2 (en) | 2009-12-10 | 2009-12-10 | Rope, method of forming an eye in a rope, and use of a rope. |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US13/514,567 A-371-Of-International US8955299B2 (en) | 2009-12-10 | 2010-12-10 | Rope having a spliced eye, corresponding method of forming an eye and use of the rope |
US14/582,029 Division US9856600B2 (en) | 2009-12-10 | 2014-12-23 | Rope having a spliced eye, corresponding method of forming an eye and use of the rope |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011071387A1 true WO2011071387A1 (fr) | 2011-06-16 |
Family
ID=42269646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/NL2010/050843 WO2011071387A1 (fr) | 2009-12-10 | 2010-12-10 | Corde comprenant un œil épissé, procédé correspondant de formation d'un oeil et utilisation de la corde |
Country Status (7)
Country | Link |
---|---|
US (3) | US8955299B2 (fr) |
EP (1) | EP2510149B1 (fr) |
KR (2) | KR101830173B1 (fr) |
BR (1) | BR112012014014B1 (fr) |
NL (1) | NL2003939C2 (fr) |
PT (1) | PT2510149T (fr) |
WO (1) | WO2011071387A1 (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103074731A (zh) * | 2011-10-25 | 2013-05-01 | 阚玉华 | 高性能纤维绳索的端头结构及其制造方法 |
WO2013079459A1 (fr) | 2011-11-28 | 2013-06-06 | Teufelberger Gesellschaft M.B.H. | Oeillet de câble |
US10418011B1 (en) | 2018-03-29 | 2019-09-17 | Ableton Ag | Button |
EP3741911A1 (fr) | 2019-05-21 | 2020-11-25 | Lankhorst Touwfabrieken B.V. | Corde ayant un segment de connecteur d'extrémité comprenant deux branches de corde de longueurs inégales |
US11727905B2 (en) | 2018-03-29 | 2023-08-15 | Ableton Ag | Button with enhanced expression facilities |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL2003939C2 (en) | 2009-12-10 | 2011-06-14 | Lankhorst Touwfab Bv | Rope, method of forming an eye in a rope, and use of a rope. |
US9816228B2 (en) * | 2013-07-29 | 2017-11-14 | Braskem S.A. | Cable and method for manufacturing a synthetic cable |
WO2018204553A1 (fr) * | 2017-05-02 | 2018-11-08 | Us Biodesign, Llc | Textile tressé et son procédé de fabrication |
WO2020041629A1 (fr) * | 2018-08-23 | 2020-02-27 | Actuant Corporation | Structure de corde tressée |
US20240183105A1 (en) * | 2021-04-20 | 2024-06-06 | Bridon International Limited | Synthetic fiber rope |
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2010
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- 2010-12-10 US US13/514,567 patent/US8955299B2/en active Active
- 2010-12-10 KR KR1020187004112A patent/KR101941700B1/ko active IP Right Grant
- 2010-12-10 BR BR112012014014-0A patent/BR112012014014B1/pt active IP Right Grant
- 2010-12-10 WO PCT/NL2010/050843 patent/WO2011071387A1/fr active Application Filing
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EP3741911A1 (fr) | 2019-05-21 | 2020-11-25 | Lankhorst Touwfabrieken B.V. | Corde ayant un segment de connecteur d'extrémité comprenant deux branches de corde de longueurs inégales |
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US8955299B2 (en) | 2015-02-17 |
EP2510149B1 (fr) | 2018-06-27 |
US20180119342A1 (en) | 2018-05-03 |
US20150107213A1 (en) | 2015-04-23 |
PT2510149T (pt) | 2018-10-19 |
NL2003939C2 (en) | 2011-06-14 |
KR101830173B1 (ko) | 2018-02-21 |
BR112012014014A2 (pt) | 2016-04-12 |
KR101941700B1 (ko) | 2019-01-24 |
US9856600B2 (en) | 2018-01-02 |
EP2510149A1 (fr) | 2012-10-17 |
BR112012014014B1 (pt) | 2020-11-10 |
KR20180020309A (ko) | 2018-02-27 |
US10669670B2 (en) | 2020-06-02 |
KR20120101538A (ko) | 2012-09-13 |
US20120297745A1 (en) | 2012-11-29 |
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