WO2011148469A1 - Câble pour ascenseur - Google Patents

Câble pour ascenseur Download PDF

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Publication number
WO2011148469A1
WO2011148469A1 PCT/JP2010/058892 JP2010058892W WO2011148469A1 WO 2011148469 A1 WO2011148469 A1 WO 2011148469A1 JP 2010058892 W JP2010058892 W JP 2010058892W WO 2011148469 A1 WO2011148469 A1 WO 2011148469A1
Authority
WO
WIPO (PCT)
Prior art keywords
rope
friction
coating layer
elevator
resin coating
Prior art date
Application number
PCT/JP2010/058892
Other languages
English (en)
Japanese (ja)
Inventor
道雄 村井
光井　厚
晋也 内藤
篤志 船田
中川　博之
力雄 近藤
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to EP10852140.2A priority Critical patent/EP2578527B1/fr
Priority to JP2012517039A priority patent/JP5409905B2/ja
Priority to PCT/JP2010/058892 priority patent/WO2011148469A1/fr
Priority to CN201080066967.XA priority patent/CN102906000B/zh
Priority to KR1020127029235A priority patent/KR101425297B1/ko
Publication of WO2011148469A1 publication Critical patent/WO2011148469A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/06—Arrangements of ropes or cables
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B5/00—Making ropes or cables from special materials or of particular form
    • D07B5/005—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties
    • D07B5/006—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties by the properties of an outer surface polymeric coating
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/16—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
    • D07B1/162—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics characterised by a plastic or rubber enveloping sheathing
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/22—Flat or flat-sided ropes; Sets of ropes consisting of a series of parallel ropes
    • 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
    • D07B2201/2087—Jackets or coverings being of the coated type
    • 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
    • D07B2201/2092—Jackets or coverings characterised by the materials used
    • 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
    • D07B2205/2003—Thermoplastics
    • 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
    • D07B2205/2064—Polyurethane resins
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2007—Elevators

Definitions

  • the present invention relates to an elevator rope that is used in an elevator and suspends a car.
  • a sheave having a diameter of 40 times or more of the rope diameter is used in order to prevent early wear and disconnection of the rope. Therefore, in order to reduce the diameter of the sheave, it is necessary to reduce the diameter of the rope.
  • the rope diameter is reduced without changing the number of ropes, the strength of the ropes may be reduced and the loadable weight of the elevator may be reduced.
  • the increase in the number of ropes complicates the configuration of the elevator apparatus. Further, if the diameter of the drive sheave is reduced, the bending fatigue life of the rope is shortened, and the rope needs to be frequently replaced.
  • a strand is formed by twisting a plurality of steel wires
  • a wire rope is formed by twisting a plurality of strands
  • the outermost periphery of the wire rope is covered with a resin material.
  • a rope see, for example, Patent Document 1.
  • An elevator using such a rope is driven by a frictional force between a sheave and a resin material constituting the outermost periphery of the rope. Therefore, it is desired to stabilize or improve the friction characteristics of the resin material.
  • a rope covered with a polyurethane coating material not containing wax for example, see Patent Document 2.
  • the present invention has been made to solve the above problems, and an object thereof is to obtain an elevator rope having a stable coefficient of friction without depending on temperature and sliding speed.
  • thermoplastic polyurethane can be used to obtain an elevator rope having a small coefficient of friction variation even in a wide range of sliding speeds ranging from holding for a long time to sudden stopping of the elevator. It is useful to use a resin material in which an elastomer is added with a friction stabilizer having a melting point of 100 ° C. or more and 150 ° C. or less and an isocyanate compound having two or more isocyanate groups in one molecule as a covering layer of the rope body.
  • the headline and the present invention have been completed.
  • a resin coating layer forming composition in which a friction stabilizer having a melting point of 100 ° C. or higher and 150 ° C. or lower and an isocyanate compound having two or more isocyanate groups in one molecule are added to a thermoplastic polyurethane elastomer.
  • Embodiments of the present invention will be described below.
  • Embodiment 1 FIG.
  • the outer periphery of the rope body has a thermoplastic polyurethane elastomer, a friction stabilizer having a melting point of 100 ° C. or higher and 150 ° C. or lower, and two or more isocyanate groups in one molecule. It is characterized by being coated with a molded body of a resin coating layer forming composition mixed with an isocyanate compound. The reason why the coefficient of friction stabilizes without depending on temperature and sliding speed is that the friction stabilizer does not melt and does not melt under sliding conditions where there is little generation of frictional heat, such as when the elevator is stationary and during normal operation.
  • the coefficient of friction is not reduced, but under sliding conditions where the sliding speed is large and significant frictional heat is generated, such as when the elevator suddenly stops, the friction stabilizer melts and the lubricity of the resin coating layer increases rapidly. This is considered to be because the temperature rise on the friction surface was suppressed, and as a result, the resin coating layer was not reduced in strength or melted, damage due to friction was suppressed, and a certain coefficient of friction could be secured.
  • thermoplastic polyurethane elastomer examples include ester-based thermoplastic polyurethane elastomer, ether-based thermoplastic polyurethane elastomer, ester-ether-based thermoplastic polyurethane elastomer, carbonate-based thermoplastic polyurethane elastomer, and the like. These may be used alone or in combination of two or more.
  • thermoplastic polyurethane elastomers ether-based thermoplastic polyurethane elastomers are preferably used in order to prevent hydrolysis that occurs in the environment of use, and considering the flexibility and durability of elevator ropes, JIS A hardness (JIS K7215).
  • thermoplastic polyurethane elastomer having a hardness of 85 to 95 in accordance with the type A durometer defined by the above.
  • thermoplastic polyurethane elastomer processed into the pellet form from the point of handleability, such as mixing with a friction stabilizer and the isocyanate compound which has two or more isocyanate groups in 1 molecule.
  • Examples of the friction stabilizer having a melting point of 100 ° C. or higher and 150 ° C. or lower used in the present embodiment include waxes such as paraffin wax, microcrystalline wax and low molecular weight polyolefin wax, fatty acid amide, polyethylene and polypropylene, and the like. A polyolefin resin is used. Among these, an olefinic compound is preferable in order to reduce the variation in the coefficient of friction during stationary holding.
  • the friction stabilizer has a melting point of less than 100 ° C., the friction coefficient of the rope surface under an environment where the atmospheric temperature is high, such as in summer, especially the friction under the sliding condition where the sliding speed is extremely low such as when holding at rest. The coefficient may be too low.
  • the addition amount of the friction stabilizer is not particularly limited, but is preferably 0.5% by weight or more and 5% by weight or less, more preferably 1% by weight or more and 3% by weight or less with respect to the resin coating layer forming composition. It is. If the added amount of the friction stabilizer is less than 0.5% by weight, a resin coating layer having a stable friction coefficient may not be obtained. On the other hand, if the added amount exceeds 5% by weight, the strength of the coating material and wear resistance In some cases, the property and adhesiveness may deteriorate, and the flexibility and durability of the elevator rope may be impaired.
  • Examples of the isocyanate compound having two or more isocyanate groups in one molecule used in the present embodiment include 1,6-hexamethylene diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, lysine methyl ester diisocyanate, and methylene.
  • Aliphatic isocyanates such as diisocyanate, isopropylene diisocyanate, lysine diisocyanate, 1,5-octylene diisocyanate, dimer diisocyanate, 4,4′-dicyclohexylmethane diisocyanate, isophorone diisocyanate, hydrogenated tolylene diisocyanate, methylcyclohexane diisocyanate, isopropylidene
  • Alicyclic isocyanates such as dicyclohexyl-4,4′-diisocyanate, 2,4- or 2,6-to Diisocyanate, 4,4'-diphenylmethane diisocyanate, 1,5-naphthylene diisocyanate, xylylene diisocyanate, triphenylmethane triisocyanate, tris (4-phenylisocyanate) thiophosphate, tolidine diisocyanate, p-phenylene diis
  • an isocyanate prepolymer having an isocyanate group at the molecular end obtained by reacting an active hydrogen compound such as polyol or polyamine with the above-mentioned isocyanate as an isocyanate compound having two or more isocyanate groups in one molecule. It can.
  • active hydrogen compound such as polyol or polyamine
  • isocyanate compounds have an effect of further stabilizing the friction coefficient with respect to temperature and sliding speed.
  • the isocyanate compound is a resin composition (premixed with a thermoplastic resin having poor reactivity with an isocyanate compound other than the thermoplastic polyurethane elastomer and processed into a pellet from the viewpoint of handling properties such as mixing with the thermoplastic polyurethane elastomer)
  • an isocyanate batch examples include an epoxy resin, a polystyrene resin, a polyvinyl chloride resin, a polyvinyl acetate resin, an ethylene-vinyl acetate copolymer resin, a polyethylene resin, a polypropylene resin, A polyester resin etc. are mentioned.
  • the amount of these isocyanate compounds added may be appropriately adjusted within a range where the JIS A hardness of the obtained molded product is 98 or less and the glass transition temperature is ⁇ 20 ° C. or less.
  • the resin coating layer in the present embodiment is usually prepared by mixing the above-described thermoplastic polyurethane elastomer pellets with the above-mentioned friction stabilizer and isocyanate compound (or isocyanate batch), and then mixing them with an extrusion molding machine or an injection molding machine. It is obtained by putting in a molding machine such as the like and molding.
  • the above-mentioned resin coating layer forming composition may be further mixed with an inorganic filler in order to further stabilize the friction coefficient with respect to temperature and sliding speed.
  • inorganic fillers include spherical inorganic fillers such as calcium carbonate, silica, titanium oxide, carbon black, acetylene black, and barium sulfate, fibrous inorganic fillers such as carbon fiber and glass fiber, mica, and talc. And plate-like inorganic fillers such as bentonite. These may be used alone or in combination of two or more. Among these, it is preferable to use a fibrous inorganic filler and a plate-like inorganic filler in order to reduce the variation of the friction coefficient.
  • the hardness of these inorganic fillers is not particularly limited.
  • the amount of these inorganic fillers to be added may be appropriately adjusted within a range in which the obtained molded article has a JIS A hardness of 98 or less and a glass transition temperature of ⁇ 20 ° C. or less.
  • the reason why the JIS A hardness of the molded body is defined as 98 or less is that if it exceeds 98, the flexibility of the rope is impaired, and there is a tendency that the power consumption increases when this is applied to an elevator and driven. It was because it was understood by the study of the people.
  • the JIS A hardness of the molded body is more preferably 85 or more and 95 or less.
  • the reason why the glass transition temperature of the molded body is defined as ⁇ 20 ° C. or lower is that the higher the glass transition temperature of the molded body, the smaller the dependency of the friction coefficient on the sliding speed, but the lower the glass transition temperature of the molded body.
  • the glass transition temperature of the molded body is more preferably ⁇ 25 ° C. or lower.
  • the elevator rope according to the present embodiment is characterized by the outermost resin material covering the outer periphery of the rope body, so the structure of the rope body is not particularly limited. Includes a strand or a cord formed by twisting a plurality of steel strands as a load supporting member.
  • the rope body in the present embodiment may be in the form of a belt including the above-described strands or cords.
  • a metal such as Chemlock (registered trademark) 218 (manufactured by Road Far East) and an adhesive for polyurethane are preliminarily applied to the above strands or cords. It is preferable to keep it.
  • Examples 1 to 11 A friction stabilizer and, if necessary, an inorganic filler were added to a JIS A hardness 95 ether-based thermoplastic polyurethane elastomer (hereinafter sometimes abbreviated as TPU), and then processed into a pellet.
  • TPU JIS A hardness 95 ether-based thermoplastic polyurethane elastomer
  • a pellet-shaped resin composition obtained by kneading 1.85 parts by mass of a polystyrene resin, 1.3 parts by mass of an epoxy resin and 1.85 parts by mass of 4,4′-diphenylmethane diisocyanate in this pellet-shaped resin composition using a twin screw extruder.
  • a predetermined amount of the isocyanate batch was added, and the mixture was sufficiently mixed and supplied to an extruder, and molded as a resin coating layer covering the outer periphery of the rope body.
  • the rope main body was coated with the resin coating layer, it was heated at 100 ° C. for 2 hours for curing the adhesive and annealing the resin coating layer to obtain an elevator rope having a diameter of 12 mm.
  • the obtained rope for elevators has a cross-sectional structure described in FIG. 1 of International Publication No. 2003/050348.
  • the rope body includes an inner layer rope having a plurality of core ropes in which a plurality of steel strands are twisted together and a plurality of inner layer strands in which a plurality of steel strands are twisted, and an inner layer rope It corresponds to a resin inner layer covering covering the outer periphery, and an outer layer rope provided on the outer peripheral portion of the inner layer covering, and having an outer layer rope with a plurality of steel strands twisted together,
  • the resin coating layer corresponds to the outer layer covering.
  • the glass transition temperature (Tg) of the resin coating layer was measured as follows. A molding composition having the same composition as the resin coating layer used in each of the examples and comparative examples was supplied to an injection molding machine, molded into a flat plate of 100 mm ⁇ 100 mm ⁇ thickness 2 mm, and heated at 100 ° C. for 2 hours. A test piece of 50 mm ⁇ 10 mm ⁇ thickness 2 mm was cut out from the center.
  • the loss elastic modulus of the test piece was measured under the conditions of deformation mode bending mode, measurement frequency 10 Hz, heating rate 2 ° C./min, and excitation amplitude 10 ⁇ m.
  • the peak temperature of the elastic modulus was Tg.
  • JIS A hardness of resin coating layer According to JIS K7215, the durometer A hardness was measured using a type A durometer.
  • FIG. 2 is a conceptual diagram of an apparatus for measuring a friction coefficient in a minute sliding speed region.
  • the elevator rope 1 obtained in the example and the comparative example is wound around the sheave 2 by 180 degrees, one end is fixed to the measuring device 3, the other end is connected to the weight 4, and the elevator rope is used. Rope 1 was tensioned.
  • the rope tension (T 2 ) on the fixed side is loosened by the frictional force generated between the elevator rope 1 and the sheave 2 and the rope tension on the weight side ( A difference in tension occurs with respect to T 1 ).
  • the rope tension (T 1 ) on the weight side and the rope tension (T 2 ) on the fixed side were measured by a load cell provided at the connecting portion between the rope and the weight.
  • the sliding speed during stationary holding is defined as 1 ⁇ 10 ⁇ 5 mm / sec
  • the sliding speed during normal operation is defined as 1 mm / sec
  • the measurement was carried out at an ambient temperature of 25 ° C. The results are shown in Tables 1 and 2.
  • FIG. 3 is a conceptual diagram of an apparatus for measuring a friction coefficient in a large sliding speed range for emergency stopping.
  • the elevator rope 1 obtained in the example and the comparative example was wound around the drive sheave 5 by 180 degrees, one end thereof was connected to the weight 4a, and the other end was connected to the weight 4b having a mass larger than that of the weight 4a.
  • the weight 4a is raised by rotating the driving sheave 5 clockwise, and when the rope speed reaches 4 m / s, the driving sheave 5 is suddenly stopped, and the elevator rope 1 is slipped with respect to the driving sheave 5. It was.
  • the minimum deceleration ⁇ of the weight 4a, the tension (T 3 ) on the side of the weight 4a and the tension (T 4 ) on the side of the weight 4b are measured by the load cell provided at the connecting portion of the rope and the weight, and these values are measured.
  • the minimum friction coefficient ⁇ 2 during slip was obtained. The measurement was carried out at an ambient temperature of 25 ° C. Tables 1 and 2 show the test results for the first time (first time) and the test results when the same surface of the resin coating layer was repeatedly slipped 10 times.
  • K 2 is the same as the value used in the measurement method in the minute slip velocity region
  • friction stabilizer 1 is a polyethylene wax having a melting point of 115 ° C.
  • friction stabilizer 2 is a polypropylene wax having a melting point of 150 ° C.
  • friction stabilizer 3 is an ethylene / bisstearic acid amide having a melting point of 144 ° C.
  • the friction stabilizer 4 is stearic acid amide having a melting point of 100 ° C.
  • the friction stabilizer 5 is a hardened castor oil having a melting point of 85 ° C.
  • the friction stabilizer 6 is a paraffin wax having a melting point of 55 ° C.
  • the friction stabilizer 7 has a melting point. 53 ° C.
  • friction stabilizer 8 is calcium stearate having a melting point of 155 ° C.
  • inorganic filler 1 is titanium oxide
  • inorganic filler 2 is glass fiber (fiber length 1 mm).
  • the inorganic filler 3 is talc.
  • the minute slip speed range (1 ⁇ 10 ⁇ 5 mm / s) and the friction coefficient at the time of emergency stop are usually It showed a tendency to lower than the friction coefficient during operation.
  • the friction coefficient of the resin coating layer tended to further decrease from the initial level.
  • the friction coefficient at the time of emergency stop after the initial sliding test and the minute slip speed range were both 0.2 or more.
  • Example 7 to 9 in which the friction stabilizer, the isocyanate compound that is a crosslinking agent, and an inorganic filler are used in combination, the variation of the friction coefficient is small, and in particular, the glass fibers that are fibrous inorganic fillers are added in Example 8 and It was found that in Example 9 in which talc, which is a plate-like inorganic filler, was added, the variation in the friction coefficient was particularly small. It was also found that Examples 1 to 4 and 7 to 11 using olefinic compounds as friction stabilizers showed particularly small fluctuations in the friction coefficient when held stationary.

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  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Ropes Or Cables (AREA)

Abstract

L'invention concerne un câble pour un ascenseur, qui comprend : un corps principal de câble ; et une couche de revêtement de résine qui recouvre la périphérie externe du corps principal de câble et qui comprend un produit moulé de composition de formation de couche de revêtement de résine préparée en mélangeant un élastomère polyuréthane thermoplastique, un stabilisateur de frottement présentant un point de fusion compris entre 100 et 150°C, et un composé isocyanate comprenant au moins deux groupes isocyanate par molécule. Afin de stabiliser davantage le coefficient de frottement, une substance de remplissage inorganique peut en outre être ajoutée à la composition de formation de couche de revêtement de résine. Le câble pour ascenseur peut présenter un coefficient de frottement stable indépendamment des températures ou des taux de glissement.
PCT/JP2010/058892 2010-05-26 2010-05-26 Câble pour ascenseur WO2011148469A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP10852140.2A EP2578527B1 (fr) 2010-05-26 2010-05-26 Câble pour ascenseur
JP2012517039A JP5409905B2 (ja) 2010-05-26 2010-05-26 エレベータ用ロープ
PCT/JP2010/058892 WO2011148469A1 (fr) 2010-05-26 2010-05-26 Câble pour ascenseur
CN201080066967.XA CN102906000B (zh) 2010-05-26 2010-05-26 电梯用绳索
KR1020127029235A KR101425297B1 (ko) 2010-05-26 2010-05-26 엘리베이터용 로프

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2010/058892 WO2011148469A1 (fr) 2010-05-26 2010-05-26 Câble pour ascenseur

Publications (1)

Publication Number Publication Date
WO2011148469A1 true WO2011148469A1 (fr) 2011-12-01

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ID=45003477

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/058892 WO2011148469A1 (fr) 2010-05-26 2010-05-26 Câble pour ascenseur

Country Status (5)

Country Link
EP (1) EP2578527B1 (fr)
JP (1) JP5409905B2 (fr)
KR (1) KR101425297B1 (fr)
CN (1) CN102906000B (fr)
WO (1) WO2011148469A1 (fr)

Cited By (2)

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WO2013053621A1 (fr) * 2011-10-13 2013-04-18 Nv Bekaert Sa Ensemble porteur comprenant un câble d'acier et une gaine
JPWO2013128956A1 (ja) * 2012-02-27 2015-07-30 三菱電機株式会社 樹脂膜の劣化検出方法および樹脂膜の劣化検出装置

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CN104044973A (zh) * 2014-05-23 2014-09-17 苏州市东沪电缆有限公司 扁形随行电梯平衡补偿链
ES2822951T3 (es) * 2016-07-19 2021-05-05 Bekaert Advanced Cords Aalter Nv Un miembro de tensión del elevador con un recubrimiento de elastómero de poliuretano termoplástico duro
US11459209B2 (en) * 2017-11-10 2022-10-04 Otis Elevator Company Light weight load bearing member for elevator system

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
WO2013053621A1 (fr) * 2011-10-13 2013-04-18 Nv Bekaert Sa Ensemble porteur comprenant un câble d'acier et une gaine
JPWO2013128956A1 (ja) * 2012-02-27 2015-07-30 三菱電機株式会社 樹脂膜の劣化検出方法および樹脂膜の劣化検出装置
US9632014B2 (en) 2012-02-27 2017-04-25 Mitsubushi Electric Corporation Method and apparatus for detecting degradation of resin film

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JP5409905B2 (ja) 2014-02-05
CN102906000A (zh) 2013-01-30
JPWO2011148469A1 (ja) 2013-07-25
CN102906000B (zh) 2014-10-29
KR20130006687A (ko) 2013-01-17
EP2578527A1 (fr) 2013-04-10
KR101425297B1 (ko) 2014-07-31
EP2578527A4 (fr) 2016-05-25
EP2578527B1 (fr) 2017-08-30

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