EP1329413B1 - Hoisting rope - Google Patents

Hoisting rope Download PDF

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Publication number
EP1329413B1
EP1329413B1 EP00953527A EP00953527A EP1329413B1 EP 1329413 B1 EP1329413 B1 EP 1329413B1 EP 00953527 A EP00953527 A EP 00953527A EP 00953527 A EP00953527 A EP 00953527A EP 1329413 B1 EP1329413 B1 EP 1329413B1
Authority
EP
European Patent Office
Prior art keywords
strength
fiber
strands
rope
cladding layer
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.)
Not-in-force
Application number
EP00953527A
Other languages
German (de)
French (fr)
Other versions
EP1329413A1 (en
EP1329413A4 (en
Inventor
Takenobu Mitsubishi Denki Kabushiki Kaisha HONDA
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to PCT/JP2000/005577 priority Critical patent/WO2002016248A1/en
Publication of EP1329413A1 publication Critical patent/EP1329413A1/en
Publication of EP1329413A4 publication Critical patent/EP1329413A4/en
Application granted granted Critical
Publication of EP1329413B1 publication Critical patent/EP1329413B1/en
Anticipated expiration legal-status Critical
Not-in-force legal-status Critical Current

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Classifications

    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B1/00Constructional features of ropes or cables
    • D07B1/06Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0673Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00Other common features of elevators
    • B66B7/06Arrangements of ropes or cables
    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B1/00Constructional features of ropes or cables
    • D07B1/02Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics
    • D07B1/025Ropes 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
    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B1/00Constructional features of ropes or cables
    • D07B1/16Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
    • D07B1/165Ropes or cables with an enveloping sheathing or inlays of rubber or plastics characterised by a plastic or rubber inlay
    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B2201/00Ropes or cables
    • D07B2201/20Rope or cable components
    • D07B2201/2083Jackets or coverings
    • D07B2201/209Jackets or coverings comprising braided structures
    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B2201/00Ropes or cables
    • D07B2201/20Rope or cable components
    • D07B2201/2083Jackets or coverings
    • D07B2201/2092Jackets or coverings characterised by the materials used
    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B2205/00Rope or cable materials
    • D07B2205/20Organic high polymers
    • D07B2205/2096Poly-p-phenylenebenzo-bisoxazole [PBO]
    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B2205/00Rope or cable materials
    • D07B2205/30Inorganic materials
    • D07B2205/3007Carbon
    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B2501/00Application field
    • D07B2501/20Application field related to ropes or cables
    • D07B2501/2007Elevators

Abstract

A strand (7) is formed by parallelly collecting together a number of fine lines of high strength synthetic resin fiber. And a plurality of such strands (7) are bundled and a surface covering layer (8) of wear-resistant synthetic resin is formed to cover the outer peripheral surface thereof, thereby constituting a hoisting rope (2). The hoisting rope (2) of such arrangement is used to suspend objects (3, 4) and hoist them up through a driving sheave (1). This reduces the tendency of the hoisting rope (2) from losing its shape, making it possible to maintain strength and improve suspension reliability.

Description

    TECHNICAL FIELD
  • The present invention relates to a hoist rope which is formed from a synthetic fiber rope, the rope being made by means of bundling a plurality of strands, and which tows a member to be suspended.
  • BACKGROUND ART
  • Figs. 2 and 3 are illustrations of a related-art hoist rope described in, e.g., Japanese Patent Application Laid-Open No. 267534/1995 ( US-A-5,566,786 ). Fig. 2 is a conceptual elevation view of an elevator, showing a suspending status of a hoist rope. Fig. 3 is an enlarged transverse cross-sectional view of the hoist rope shown in Fig. 2.
  • In drawings, reference numeral 1 designates a driving sheave provided on a hoisting machine of the elevator; and 2 designates a hoist rope which is wound around the driving sheave 1 and is made of a synthetic fiber rope. A first member to be suspended 3 made up of an elevator car is coupled to one end of the hoist rope 2, and a second member to be suspended 4 made of a counterweight is coupled to the other end of the rope.
  • Reference numeral 5 designates a strand constituting a primary strength member of the hoist rope 2. The strand is made by means of plaiting a plurality of wires of high-strength synthetic resin fiber having a diameter of several microns, and bundling in parallel the wires by means of adhesive means.
  • Reference numeral 6 designates cladding material made of synthetic resin such as urethane or polyethylene. The cladding material is provided for maintaining a form in which a plurality of the strands 5 are bundled. In order to prevent abrasion of the wires of high-strength synthetic resin fiber, which would otherwise arise in outer circumferential surfaces of the strands 5 when the hoist rope 2 is subjected to repeated bending and stretching as a result of running of the elevator, the cladding material is provided so as to cover outer circumferences of the bundled strands 5.
  • The hoist rope constituted as mentioned above suffers problems; that is, a problem of the bundled form of the strands 5 being deformed as a result of occurrence of slippage between the cladding material 6 and the strands 5 for reasons of insufficient contact between the cladding material 6 with the outer circumferences of the bundled strands 5; and a problem of a drop in the strength of the hoist rope as a result of abrasion of the cladding material for reason of occurrence of micro-slippage between the strands 5 and the cladding material 6.
  • WO 98/16681 A2 discloses a hoist rope comprising strands formed by bundling yarns of high-strength synthetic fiber in parallel and a surface cladding layer formed by a combination of synthetic resin and reinforcing fibers.
  • DISCLOSURE OF THE INVENTION
  • The present invention relates to a hoist rope, wherein a plurality of strands are each formed by means of bundling a plurality of wires of high-strength synthetic fiber in parallel, and wherein outer circumferences of the bundled strands are sheathed with a surface cladding layer of wear-and-abrasion-resistant synthetic resin material and reinforcing fiber.
  • The hoist rope comprises outer- layer strength members which are each made from wires having a diameter of several microns and are interposed between the strands and the surface cladding layer, the wires being formed from the same high-strength synthetic resin as that from which the strands are formed or from synthetic resin material categorized in the same family in which the high-strength synthetic resin is categorized. As a result, the strength of the hoist rope is enhanced by means of the strength members along with the strands.
  • The outer-layer strength members are bundled in parallel by means of adhesive means made from material having a fusing point characteristic lower than that of the surface cladding layer. As a result, adhesive strength between the surface cladding layer and the outer-layer strength members can be improved. A bundled form of a plurality of strands of a hoist rope can be maintained; namely, deformation of the bundled strands can be prevented. Hence, shortening the life of the hoist rope can be prevented, thus improving the suspension reliability of the rope.
  • In a preferred embodiment the rope has a surface cladding layer formed by mixture of high-strength fiber. As a result, the strength of the surface cladding layer is improved, thus enhancing the strength of the hoist rope.
  • The rope may have a surface cladding layer formed by means of mixture of high-strength fiber, the fiber being made from the same high-strength synthetic fiber as that from which the strands are formed. As a result, the strength of the surface cladding layer is improved, thus enhancing the strength of the hoist rope.
  • The rope may have a surface cladding layer formed by means of mixture of high-strength metal fiber. As a result, the strength of the surface cladding layer is improved, thus enhancing the strength of the hoist rope.
  • The rope may have a surface cladding layer formed by means of high-strength fiber having been integrally braided into a mesh pattern. As a result, the strength of the surface cladding layer is improved, thus enhancing the strength of the hoist rope. Further, the elongation characteristic of the surface cladding layer and that of the strands can be made uniform. Further, the hoist rope is improved in wear-and-abrasion-resistance, whereby the life of the rope can be prolonged and suspension reliability of the rope can be improved.
  • BRIEF DESCRIPTIONS OF THE DRAWINGS
    • Fig. 1 is a transverse cross-sectional view of a preferable hoist rope according to the present invention;
    • Fig. 2 is a conceptual elevation view of an elevator, showing a suspending state of a related-art hoist rope; and
    • Fig. 3 is an enlarged transverse cross-sectional view of the hoist rope shown in Fig. 2.
    BEST MODES FOR IMPLEMENTING THE INVENTION
  • In order to describe a first embodiment of the present invention in more detail, the embodiment will be described by reference to the accompanying drawings. As shown in Fig. 1, reference numeral 7 designates a strand constituting a primary strength member of a hoist rope 2 made from a synthetic fiber rope, and the strand is made by bundling a plurality of wires having a diameter of several microns formed from high-strength synthetic resin fiber with adhesive means.
  • Reference numeral 8 designates a surface cladding layer which is made of wear-and-abrasion-resistant synthetic resin and is arranged so as to cover outer circumferential surfaces of the plurality of strands 7. The surface cladding layer 8 is formed from the same high-strength synthetic resin as that from which the strands 7 are formed or from synthetic resin belonging to the same family as that to which the high-strength synthetic resin belongs.
  • The strength of the surface cladding layer 8 is enhanced by mixture of high-strength fiber 9 made of PBO resin; aramid, e.g. KEVLAR®; carbon; or XYRON®. High-strength metal fiber, such as a wire formed from carbon steel by means of hardening, or a monocrystal material such as a whisker, can be employed as an alternative to the high-strength fiber 9.
  • If the high- strength fiber 9 mixed into the surface cladding layer 8 differs in elongation characteristic from high-strength synthetic fiber from which the stands 7 are formed, the high-strength fiber 9 to be mixed integrally into the surface cladding layer 8 is plaited into a mesh pattern. By means of a mesh structure of the thus-plaited fiber, the elongation characteristic of the surface cladding layer 8 and that of the strands 7 can be made uniform, and the life of the rope can be prolonged, thus improving the suspension characteristic of the rope.
  • If the high-strength fiber 9 to be mixed into the surface cladding layer 8 is formed from the same high-strength synthetic resin fiber as that from which the strands 7 are formed or if an improvement in the strength of the rope is expected by virtue of mixture of the high-strength fiber 9, the strands 7 and the high-strength fiber 9 are arranged linearly in parallel with each other in the longitudinal direction of the hoist rope 2, whereby integration of the strands 7 with the high-strength fiber 9 and an improvement in the strength of the rope can be achieved.
  • Further, if the high-strength fiber 9 to be mixed into the surface cladding layer 8 is made of a material differing from the high-strength synthetic resin fiber constituting the strands 7 or if an improvement in wear-and-abrasion resistance of the rope is expected by virtue of mixture of the high-strength fiber 9, the high-strength fiber 9 is plaited into a mesh pattern, whereby integration of the strands 7 with the high-strength fiber 9 and an improvement in the wear-and-abrasion resistance of the rope can be achieved.
  • Outer-layer strength members are formed between the strands 7 and the surface cladding layer 8. Each of the outer-layer strength members is formed by means of bundling wires having a diameter of several microns, the wires being formed from the same high-strength synthetic resin as that from which the strands are formed or from synthetic resin material categorized in the same family in which the high-strength synthetic resin is categorized. The outer-layer strength member is formed by means of bundling the wires in parallel with adhesive means. The outer-layer strength members are formed so as to enclose the outer circumferential surfaces of the plurality of strands 7. Thus, the strength of the hoist rope 2 can be enhanced by means of the strength member along with the strands 7.
  • The outer-layer strength members are bundled in parallel with each other by means of adhesive means made from material having a fusing point characteristic lower than that of the surface cladding layer 8. As a result, adhesive strength between the surface cladding layer 8 and the outer-layer strength members can be improved when the outer-layer strength members are sheathed with the surface cladding layer 8 through fused coating. An improvement in adhesive strength between the surface cladding layer 8 and the outer-layer strength members enables preservation of a bundled form of the plurality of strands 7 of the hoist rope 2; namely, deformation of the bundled strands can be prevented. Hence, shortening of the life of the hoist rope can be prevented.
  • INDUSTRIAL APPLICABILITY
  • As has been described, a hoist rope according to the present invention is provided with a plurality of strands which are each formed by means of bundling a plurality of wires of high-strength synthetic fiber in parallel, and a surface cladding layer of wear-and-abrasion-resistant synthetic resin sheathing outer circumferences of the bundled strands.
  • In relation to the hoist rope according to the present invention, outer-layer strength members are each made from wires having a diameter of several microns and are interposed between a plurality of bundled strands and a surface cladding layer, wherein the wires are formed from the same high-strength synthetic resin as that from which the strands are formed or from synthetic resin material categorized in the same family in which the high-strength synthetic resin is categorized. As a result, the strength of the hoist rope is enhanced by means of the strength members along with the strands, and the hoist rope is useful for towing a member to be suspended by way of a driving sheave. Further, desired strength is readily obtained, and a suspension reliability of the rope can be improved. Hence, the rope is suitable for towing the member.
  • The hoist rope according to the present invention is provided with the outer-layer strength members which are bundled in parallel by means of adhesive means made from material having a fusing point characteristic lower than that of the surface cladding layer. As a result, adhesive strength between the surface cladding layer and the outer-layer strength members is improved, and the rope is useful for towing a member to be suspended by way of a driving sheave. Preservation of a bundled form of a plurality of strands of a hoist rope; namely, prevention of deformation of the bundled strands, can be achieved. Hence, shortening of the life of the hoist rope can be prevented, thus improving the suspension reliability of the rope. For this reason, the rope is suitable for towing the member.
  • The hoist rope may be provided with a surface cladding layer formed by mixture of high-strength fiber. As a result, the strength of the surface cladding layer is improved, and the rope is useful for towing a member to be suspended by way of a driving sheave. Since desired strength is readily obtained and the suspension reliability of the rope can be improved, the rope is suitable for towing the member.
  • The hoist rope may be provided with a surface cladding layer formed by means of mixture of high-strength fiber, the fiber being made from the same high-strength synthetic fiber as that from which the strands are formed. As a result, the strength of the surface cladding layer is enhanced, and the rope is useful for towing a member to be suspended by way of a driving sheave. Since desired strength is readily obtained, and the suspension reliability of the rope can be improved. Hence, the rope is suitable for towing the member.
  • The hoist rope may be provided with a surface cladding layer formed by means of mixture of high-strength metal fiber. As a result, the strength of the surface cladding layer is enhanced, and the rope is useful for towing a member to be suspended by way of a driving sheave. Since desired strength is readily obtained, the suspension reliability of the rope can be improved. Hence, the rope is suitable for towing the member.
  • Further, the hoist rope may be provided with a surface cladding layer formed by means of high-strength fiber having been integrally braided into a mesh pattern. As a result, the strength of the surface cladding layer is enhanced, and the rope is useful for towing a member to be suspended by way of a driving sheave. Desired strength is readily obtained, and the elongation characteristic of the surface cladding layer and that of the strands can be made uniform. In addition, the wear-and-abrasion-resistance of the hoist rope is improved, whereby the life of the rope can be prolonged and suspension reliability of the rope can be improved. Hence, the rope is suitable for towing the member.

Claims (5)

  1. A hoist rope comprising:
    a plurality of strands (7) which are each formed by means of bundling a plurality of wires of high-strength synthetic fiber in parallel; and
    a surface cladding layer (8) formed by a combination of wear-and-abrasion-resistant synthetic resin material and reinforcing fiber (9) so as to cover outer circumferential surfaces of the bundled strands; characterized by
    outer-layer strength members which are formed from wires having a diameter of several microns, the wires being formed from the same high-strength synthetic resin as that from which the strands (7) are formed or from synthetic resin material categorized in the same family in which the high-strength synthetic resin is categorized, and which are interposed between the strands (7) and the surface cladding layer (8); and
    by the outer-layer strength members being formed by bundling the wires in parallel with each other by means of adhesive means made from material having a fusing point characteristic lower than that of the surface cladding layer (8).
  2. The hoist rope according to claim 1, wherein the surface cladding layer is formed by mixture of the wear-and-abrasion-resistant synthetic resin material and high-strength fiber as the reinforcing fiber (9).
  3. The hoist rope according to claim 2, wherein the high-strength fiber is the same high-strength synthetic fiber as that from which the strands (7) are formed.
  4. The hoist rope according to claim 2, wherein the high-strength fiber is a high-strength metal fiber.
  5. The hoist rope according to claim 2 or 4, wherein the high-strength fiber is plaited into a mesh pattern integrally with the surface cladding layer (8).
EP00953527A 2000-08-21 2000-08-21 Hoisting rope Not-in-force EP1329413B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2000/005577 WO2002016248A1 (en) 2000-08-21 2000-08-21 Hoisting rope

Publications (3)

Publication Number Publication Date
EP1329413A1 EP1329413A1 (en) 2003-07-23
EP1329413A4 EP1329413A4 (en) 2007-01-10
EP1329413B1 true EP1329413B1 (en) 2011-01-12

Family

ID=11736375

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00953527A Not-in-force EP1329413B1 (en) 2000-08-21 2000-08-21 Hoisting rope

Country Status (6)

Country Link
EP (1) EP1329413B1 (en)
JP (1) JP4777597B2 (en)
KR (1) KR100475330B1 (en)
CN (1) CN1379730A (en)
DE (1) DE60045525D1 (en)
WO (1) WO2002016248A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004080875A1 (en) * 2003-03-10 2004-09-23 Mitsubishi Denki Kabushiki Kaisha Elevator apparatus
CN101349145B (en) * 2007-07-18 2012-07-25 江苏联冠科技发展有限公司 Basalt cable capable of replacing pumping rod made by steel
JP2014514226A (en) 2011-04-14 2014-06-19 オーチス エレベータ カンパニー Covered rope or belt for elevator systems
JP6077941B2 (en) * 2013-06-07 2017-02-08 株式会社日立製作所 Elevator wire rope
JP2015048178A (en) * 2013-08-30 2015-03-16 東芝エレベータ株式会社 Elevator apparatus
WO2016199204A1 (en) * 2015-06-08 2016-12-15 株式会社日立製作所 Elevator main rope and elevator device using same
CN105256621A (en) * 2015-09-25 2016-01-20 安徽博邦超纤皮革有限公司 Ultrafine fiber leather rope

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2276419B2 (en) * 1973-08-01 1978-08-11 Europ France Cordes
US4422286A (en) * 1982-02-08 1983-12-27 Amsted Industries Incorporated Fiber reinforced plastic impregnated wire rope
JPH0248477Y2 (en) * 1986-02-07 1990-12-19
JP3185820B2 (en) * 1992-12-28 2001-07-11 東洋紡績株式会社 rope
CZ282660B6 (en) 1994-03-02 1997-08-13 Inventio Ag Bearer rope of lifting and transport facilities
JPH08209563A (en) * 1995-02-06 1996-08-13 Du Pont Toray Keburaa Kk Yarn rope
US5881843A (en) * 1996-10-15 1999-03-16 Otis Elevator Company Synthetic non-metallic rope for an elevator
JP3225224B2 (en) * 1998-04-10 2001-11-05 東京製綱繊維ロープ株式会社 High strength fiber rope
DE19819522B4 (en) * 1998-04-30 2007-12-13 Roblon A/S Rope for attaching power cables to poles
EP1004700B1 (en) * 1998-11-25 2011-02-16 Inventio AG Synthetic fibre rope without a jacket and its corresponding method of manufacturing

Also Published As

Publication number Publication date
EP1329413A4 (en) 2007-01-10
JP4777597B2 (en) 2011-09-21
KR20020035891A (en) 2002-05-15
DE60045525D1 (en) 2011-02-24
CN1379730A (en) 2002-11-13
WO2002016248A1 (en) 2002-02-28
EP1329413A1 (en) 2003-07-23
KR100475330B1 (en) 2005-03-09

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