EP0020130A1 - Ropes - Google Patents

Ropes Download PDF

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Publication number
EP0020130A1
EP0020130A1 EP80301757A EP80301757A EP0020130A1 EP 0020130 A1 EP0020130 A1 EP 0020130A1 EP 80301757 A EP80301757 A EP 80301757A EP 80301757 A EP80301757 A EP 80301757A EP 0020130 A1 EP0020130 A1 EP 0020130A1
Authority
EP
European Patent Office
Prior art keywords
rope
sheath
ropes
rope assembly
encased
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP80301757A
Other languages
German (de)
French (fr)
Inventor
Arthur George Tompsett
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marlow Ropes Ltd
Original Assignee
Marlow Ropes Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Marlow Ropes Ltd filed Critical Marlow Ropes Ltd
Publication of EP0020130A1 publication Critical patent/EP0020130A1/en
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
    • D04C1/00—Braid or lace, e.g. pillow-lace; Processes for the manufacture thereof
    • D04C1/06—Braid or lace serving particular purposes
    • D04C1/12—Cords, lines, or tows
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/02—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics
    • D07B1/025—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics comprising high modulus, or high tenacity, polymer filaments or fibres, e.g. liquid-crystal polymers
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/02—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics
    • D07B1/04—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics with a core of fibres or filaments arranged parallel to the centre line
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/10—Rope or cable structures
    • D07B2201/104—Rope or cable structures twisted
    • D07B2201/1056—Rope or cable structures twisted using alternate lay, i.e. the wires or filaments in the strands being oppositely inclined relative to the rope axis
    • 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
    • D07B2201/209—Jackets or coverings comprising braided structures
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/20—Organic high polymers
    • D07B2205/2039—Polyesters
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/20—Organic high polymers
    • D07B2205/2046—Polyamides, e.g. nylons
    • D07B2205/205—Aramides
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2401/00—Aspects related to the problem to be solved or advantage
    • D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
    • D07B2401/2085—Adjusting or controlling final twist
    • D07B2401/209—Adjusting or controlling final twist comprising compensation of rope twist in strand twist

Definitions

  • the present invention relates to ropes.
  • rope is meant an elongate member formed by twisting, laying, weaving or otherwise entwining a plurality of strands.
  • the invention provides a rope assembly comprising a plurality of ropes encased in a braided sheath, in which each rope is formed of at least two strands.
  • each sheath yarn is made of 4.4 lea staple which is spun at a twist of 3.0 turns per inch.
  • Each of the encased ropes forming the core is made of yarns which are based on ICI fibres Type 125 continuous filament polyester yarn.
  • the rope assembly of the embodiment has an average breaking load of 15.34 tonnes and a flex angle of 60°. The weight of the finished rope at check load is 41.6 kilogrammes per 100 metres.
  • the rope assembly has a stitch length of 80 millimetres at zero load, and of 84.6 millimetres at . check load.
  • the following table 1 sets out the data for 24 millimetre and 32 millimetre diameter rope assemblies constituting examples of the invention.
  • the encased ropes forming the core of rope assemblies of the invention can be based on a wide range of man-made, synthetic and natural fibres. Because the core ropes according to this invention are laid rather than twisted there is only a low variation of tension between the constituent yarns of each core rope. This method of construction is thus particularly suitable for constituent yarns having low extensibility such as organic polyamids.
  • the core ropes are constructed from "Aramid" organic polyamid yarns each covered with a polyester cover.
  • One example of such a yarn is that sold under the trade name Du Pont Kevlar PC.
  • the following table 2 sets out the data for 8mm and 24mm diameter rope assemblies constituting further examples of the invention.
  • the accompanying sketch illustrates one rope assembly of the invention; this assembly comprises four three-strand laid ropes 2 encased in a braided sheath 4.
  • the invention includes within its scope a rope assembly including two or more ropes encased in a braided sheath, and that each encased rope may be formed by entwining two or more strands.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Ropes Or Cables (AREA)

Abstract

A rope assembly comprises a plurality of ropes encased in a braided sheath, in which each rope is formed of at least two strands.
One rope assembly of the invention comprises 18 3- strand laid ropes encased in a sheath of 24 millimetres nominal diameter. This sheath consists of 16 plaits each having 18 yams per plait. Each sheath yam is made of 4.5 lea staple which is spun at a twist of 3.0 turns per inch. Each of the encased ropes forming the core is made of yams which are based on I.C.I. fibres Type 125 continuous filament polyester yam. The rope assembly has an average breaking load of 15.34 tonnes and a flex angle of 60°. The weight of the finished rope at check load is 41.6 kilogrammes per 100 metres.
In another rope assembly of the invention four 3- strand laid ropes 2 are encased in a braided sheath 4.

Description

    TECHNICAL FIELD
  • The present invention relates to ropes.
  • In this specification by "rope" is meant an elongate member formed by twisting, laying, weaving or otherwise entwining a plurality of strands.
  • The invention provides a rope assembly comprising a plurality of ropes encased in a braided sheath, in which each rope is formed of at least two strands.
    • DESCRIPTION
  • In one rope assembly of the invention, eighteen 3-strand laid ropes are encased in a sheath of 24 millimetres nominal diameter consisting of 16 plaits each having 18 yarns per plait.. Each sheath yarn is made of 4.4 lea staple which is spun at a twist of 3.0 turns per inch. Each of the encased ropes forming the core is made of yarns which are based on ICI fibres Type 125 continuous filament polyester yarn. The rope assembly of the embodiment has an average breaking load of 15.34 tonnes and a flex angle of 60°. The weight of the finished rope at check load is 41.6 kilogrammes per 100 metres.
  • The rope assembly has a stitch length of 80 millimetres at zero load, and of 84.6 millimetres at . check load.
  • The following table 1 sets out the data for 24 millimetre and 32 millimetre diameter rope assemblies constituting examples of the invention.
    Figure imgb0001
    Figure imgb0002
  • The encased ropes forming the core of rope assemblies of the invention can be based on a wide range of man-made, synthetic and natural fibres. Because the core ropes according to this invention are laid rather than twisted there is only a low variation of tension between the constituent yarns of each core rope. This method of construction is thus particularly suitable for constituent yarns having low extensibility such as organic polyamids.
  • In a further embodiment of the invention the core ropes are constructed from "Aramid" organic polyamid yarns each covered with a polyester cover. One example of such a yarn is that sold under the trade name Du Pont Kevlar PC.
  • The following table 2 sets out the data for 8mm and 24mm diameter rope assemblies constituting further examples of the invention.
    Figure imgb0003
    Figure imgb0004
  • The accompanying sketch illustrates one rope assembly of the invention; this assembly comprises four three-strand laid ropes 2 encased in a braided sheath 4.
  • It is to be understood that the invention includes within its scope a rope assembly including two or more ropes encased in a braided sheath, and that each encased rope may be formed by entwining two or more strands.
  • Advantages of the aforementioned embodiment of the invention include:-
    • (1) Alternate encased core ropes of the rope assembly may be of opposite hand; i.e. alternative ropes may be formed of strands of S and Z twists. This reduces the tendency for the rope assembly to rotate when extended.
    • (2) The construction of the rope assembly provides it with improved flexibility.
    • (3) Rope is stored by being wound on reels of standard size. Consequently the greater the rope diameter the shorter the length of rope that can be stored on a reel of any given size. Because the rope assembly of the invention includes a plurality of core ropes, each core , rope is of smaller diameter than previously proposed constructions in which only a single core rope is used. Consequently, the rope assembly of the invention can be constructed in considerably longer lengths than previously proposed rope assemblies using a single core rope, and
    • (4) The plurality of core ropes included in the rope assembly of the invention ensures that the rope assembly possesses a greater strength and breaking load than previously proposed single core rope assemblies.

Claims (9)

1. A rope assembly comprising a braided sheath and plurality of ropes encased in the sheath, in which each rope is formed of at least two strands.
2. A rope assembly as claimed in Claim 1, in which each rope is a 3-strand laid rope.
3. A rope assembly as claimed in Claim 1 or Claim 2, in which the ropes are encased in a sheath consisting of 16 plaits, each having 18 yarns per plait.
4. A rope assembly as claimed in any preceding Claim, in which 18 ropes are encased in a sheath of 24 millimetres nominal diameter.
5. A rope assembly as claimed in any preceding Claim in which each sheath yarn is made of 4.4 lea staple spun at a twist of 3.0 turns per inch.
6. A rope assembly as claimed in any preceding Claim, having an average breaking load of 15.34 tonnes, and a flex angle of 60°.
7. A rope assembly as claimed in any preceding Claim, having a weight at check load of 41.6 kilogrammes per 100 metres.
8. A rope assembly as claimed in any preceding Claim, having a stitch length of 80 millimetres at zero load, and of 84.6 millimetres at check load.
9. A rope assembly as claimed in any preceding Claim, in which each core rope is made of "Aramid" organic polyamid yarns with. a polyester cover.
EP80301757A 1979-05-30 1980-05-28 Ropes Withdrawn EP0020130A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7918850 1979-05-30
GB7918850 1979-05-30

Publications (1)

Publication Number Publication Date
EP0020130A1 true EP0020130A1 (en) 1980-12-10

Family

ID=10505539

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80301757A Withdrawn EP0020130A1 (en) 1979-05-30 1980-05-28 Ropes

Country Status (1)

Country Link
EP (1) EP0020130A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2592578A1 (en) * 1986-01-08 1987-07-10 Fremigacci Pierre Prosthetic joint ligament made of woven synthetic fibre
FR2627784A1 (en) * 1988-02-26 1989-09-01 Thomson Csf Towing cable for linear seismic prospecting antenna - with elastic core and sheath deforming until point where it stiffens under traction
FR3086675A1 (en) * 2018-10-02 2020-04-03 Ideol MARINE CORDAGE WITH INDIVIDUAL COATING OF EACH CORE

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1690846A (en) * 1926-04-07 1928-11-06 Claude A Turner Rope or cord
US2737075A (en) * 1952-09-05 1956-03-06 George H Poirier Cord structure
GB825627A (en) * 1955-02-02 1959-12-16 Hoechst Ag Improvements in or relating to the manufacture of ropes
FR1248273A (en) * 1959-12-03 1960-12-09 Hunter Douglas International Cord or band, especially for blinds or curtains
FR1428243A (en) * 1964-03-02 1966-02-11 Schjeldahl Co G T Projection method and apparatus
FR1460732A (en) * 1965-10-04 1966-03-04 Cousin Freres Sa Improvements to ropes
CH410724A (en) * 1962-03-15 1966-03-31 F Schmied Ernst Mountain rope
DE7423933U (en) * 1974-07-13 1974-10-24 Hoechst Ag
US3911785A (en) * 1974-01-18 1975-10-14 Wall Ind Inc Parallel yarn rope
FR2292071A1 (en) * 1974-11-22 1976-06-18 Felten & Guilleaume Carlswerk SYNTHETIC TRACTION CABLE, ESPECIALLY FOR CRANE OR SIMILAR MACHINE
US3968725A (en) * 1974-12-13 1976-07-13 Berkley & Company, Inc. High strength, low stretch braided rope

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1690846A (en) * 1926-04-07 1928-11-06 Claude A Turner Rope or cord
US2737075A (en) * 1952-09-05 1956-03-06 George H Poirier Cord structure
GB825627A (en) * 1955-02-02 1959-12-16 Hoechst Ag Improvements in or relating to the manufacture of ropes
FR1248273A (en) * 1959-12-03 1960-12-09 Hunter Douglas International Cord or band, especially for blinds or curtains
CH410724A (en) * 1962-03-15 1966-03-31 F Schmied Ernst Mountain rope
FR1428243A (en) * 1964-03-02 1966-02-11 Schjeldahl Co G T Projection method and apparatus
FR1460732A (en) * 1965-10-04 1966-03-04 Cousin Freres Sa Improvements to ropes
US3911785A (en) * 1974-01-18 1975-10-14 Wall Ind Inc Parallel yarn rope
DE7423933U (en) * 1974-07-13 1974-10-24 Hoechst Ag
FR2292071A1 (en) * 1974-11-22 1976-06-18 Felten & Guilleaume Carlswerk SYNTHETIC TRACTION CABLE, ESPECIALLY FOR CRANE OR SIMILAR MACHINE
US3968725A (en) * 1974-12-13 1976-07-13 Berkley & Company, Inc. High strength, low stretch braided rope

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2592578A1 (en) * 1986-01-08 1987-07-10 Fremigacci Pierre Prosthetic joint ligament made of woven synthetic fibre
FR2627784A1 (en) * 1988-02-26 1989-09-01 Thomson Csf Towing cable for linear seismic prospecting antenna - with elastic core and sheath deforming until point where it stiffens under traction
FR3086675A1 (en) * 2018-10-02 2020-04-03 Ideol MARINE CORDAGE WITH INDIVIDUAL COATING OF EACH CORE
WO2020070413A1 (en) * 2018-10-02 2020-04-09 Ideol Marine rope having an individual coating of each core
CN112805435A (en) * 2018-10-02 2021-05-14 伊代奥尔公司 Marine cable with independent sheath for each core
US11828022B2 (en) 2018-10-02 2023-11-28 Ideol Marine rope having an individual coating of each core

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

17P Request for examination filed

Effective date: 19810316

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19830228

RIN1 Information on inventor provided before grant (corrected)

Inventor name: TOMPSETT, ARTHUR GEORGE