WO2017138228A1 - エレベータロープ及びその製造方法 - Google Patents

エレベータロープ及びその製造方法 Download PDF

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Publication number
WO2017138228A1
WO2017138228A1 PCT/JP2016/085404 JP2016085404W WO2017138228A1 WO 2017138228 A1 WO2017138228 A1 WO 2017138228A1 JP 2016085404 W JP2016085404 W JP 2016085404W WO 2017138228 A1 WO2017138228 A1 WO 2017138228A1
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WO
WIPO (PCT)
Prior art keywords
rope
fiber
load bearing
load
bearing portion
Prior art date
Application number
PCT/JP2016/085404
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English (en)
French (fr)
Japanese (ja)
Inventor
晋也 内藤
肥田　政彦
道雄 村井
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 JP2017545612A priority Critical patent/JP6305659B2/ja
Priority to KR1020187008697A priority patent/KR20180048820A/ko
Priority to DE112016006384.9T priority patent/DE112016006384T5/de
Priority to CN201680041476.7A priority patent/CN108698797B/zh
Publication of WO2017138228A1 publication Critical patent/WO2017138228A1/ja

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    • 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
    • B66B7/062—Belts
    • 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
    • D07B1/02—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics
    • 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
    • D07B1/0673—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration
    • D07B1/0686—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration characterised by the core design
    • 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
    • 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
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2055—Cores characterised by their structure comprising filaments or fibers
    • 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
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2065—Cores characterised by their structure comprising a coating
    • 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
    • D07B2201/2047—Cores
    • D07B2201/2067—Cores characterised by the elongation or tension behaviour
    • D07B2201/2068—Cores characterised by the elongation or tension behaviour having a load bearing function
    • 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
    • D07B2205/2032—Polyacrylics
    • 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
    • D07B2205/00—Rope or cable materials
    • D07B2205/20—Organic high polymers
    • D07B2205/2096—Poly-p-phenylenebenzo-bisoxazole [PBO]
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/30—Inorganic materials
    • D07B2205/3007—Carbon
    • 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
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2801/00—Linked indexing codes associated with indexing codes or classes of D07B
    • D07B2801/10—Smallest filamentary entity of a rope or strand, i.e. wire, filament, fiber or yarn
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2801/00—Linked indexing codes associated with indexing codes or classes of D07B
    • D07B2801/14—Core

Definitions

  • the present invention relates to an elevator rope having a synthetic fiber rope core and a method of manufacturing the same.
  • a core rope is arranged as a rope core at the center of the rope.
  • the core rope is generally configured as a three-pipe rope formed by twisting three core rope strands together.
  • Each core rope strand is composed of a number of yarns.
  • Each yarn is configured by bundling fibers.
  • a plurality of steel strands are twisted around the outer periphery of the core rope.
  • the steel strand plays a role of bearing a load applied in the longitudinal direction of the elevator rope
  • the core rope plays a role of maintaining the shape of the elevator rope.
  • the elevator rope is loaded with the weight of the car, the weight of the counterweight, and the weight of the elevator rope itself.
  • the lift distance of the car is long, so the length of the elevator rope used is also long.
  • the influence of the weight of the elevator rope itself becomes larger, so the maximum lifting distance of the car is limited by the strength of the rope and the weight of the rope. That is, in order to increase the lifting distance of the car, a light and high strength rope having a higher mass specific strength (strength / weight per unit length) is required.
  • the strength utilization rate of the fiber is improved.
  • the strength utilization ratio is the ratio of the tensile strength of the synthetic fiber rope to the tensile strength of the synthetic fiber.
  • Such a hybrid rope is lighter and has a tensile strength equal to or higher than that of a rope having an IWRC (IndependentInRope Core) disposed on the rope core (see, for example, Patent Document 1).
  • a plurality of strands each having a tubular fabric woven with synthetic fiber warps and wefts and a plurality of synthetic fiber cores aligned in the tubular fabric are twisted together or combined.
  • the intensity utilization rate is increased (for example, refer to Patent Document 2).
  • an elevator rope is used in a load range of approximately 10% of its breaking strength, but the strain in the tensile direction of the entire rope at this time is about 1% or less than 1%.
  • the strength utilization factor is high, the load when a strain of 1% is generated in the tensile direction is insignificant. For this reason, when used as an elevator rope, that is, when used within a load load range of 10% of the breaking strength, there is almost no effect that the load of the elevator rope is borne by the synthetic fiber rope.
  • the synthetic fiber rope of Patent Document 2 for the same reason, the load when a strain of 1% is generated in the tensile direction is low. Therefore, the synthetic fiber rope of Patent Document 2 is used as the rope core of the elevator rope. Even if it is used, the steel strand virtually bears the load, and the effect of bearing the load on the rope core is poor.
  • the present invention has been made to solve the above-described problems, and can impose a larger load on the rope core to reduce the ratio of the cross-sectional area of the steel strand to the rope cross-sectional area. It is possible to obtain an elevator rope capable of reducing the overall weight and improving the mass specific strength, and a method for manufacturing the same.
  • An elevator rope according to the present invention includes a rope core having a load bearing portion made of synthetic fiber and a covering portion covering the outer periphery of the load bearing portion, and a plurality of steels made of a stranded wire wound around the outer periphery of the rope core.
  • the interfiber porosity of the synthetic fiber in the load bearing portion is 17% or less, and the rope core generates a stress of 50 MPa or more when applied with a tensile strain of 1%.
  • the manufacturing method of the elevator rope which concerns on this invention is a rope core which has a load bearing part which consists of synthetic fibers, and the coating
  • the elevator rope and the manufacturing method thereof according to the present invention can reduce the ratio of the cross-sectional area of the steel strand to the cross-sectional area of the rope by placing a larger load on the rope core, thereby reducing the overall weight and The mass specific strength can be improved.
  • FIG. 2 is a cross-sectional view taken along the line II-II in FIG. It is a graph which compares and shows the relationship between distortion and tensile stress about three types of synthetic fiber ropes. It is explanatory drawing which compares and shows the cross-sectional enlarged photograph of the load-bearing part of the rope core of 22% of the inter-fiber void ratio, and the cross-sectional enlarged photograph of the load-bearing part of the rope core with the inter-fiber space ratio of 11%.
  • FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6. It is a side view which shows the elevator rope by Embodiment 3 of this invention.
  • FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 8. It is a side view which shows the elevator rope by Embodiment 4 of this invention. It is sectional drawing which follows the XI-XI line of FIG.
  • FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG. 12. It is a side view which shows the elevator rope by Embodiment 6 of this invention.
  • FIG. 15 is a sectional view taken along line XV-XV in FIG. 14. It is explanatory drawing which shows the various measured values and calculated values about Examples 1 to 6 and Comparative Examples 1 and 2.
  • FIG. 1 is a side view showing an elevator rope according to Embodiment 1 of the present invention
  • FIG. 2 is a sectional view taken along the line II-II in FIG.
  • the elevator rope has a rope core 1 and a plurality (8 in this example) of steel strands 2 made of twisted wires arranged on the outer periphery of the rope core 1 and twisted together.
  • the rope core 1 has a load bearing part 3 disposed in the center and a synthetic fiber covering part 4 covered on the outer periphery of the load bearing part 3.
  • the steel strand 2 is partially removed to show the rope core 1
  • the covering portion 4 is partially removed to show the load bearing portion 3.
  • the load bearing part 3 is composed of a fiber assembly having a tensile strength of 20 cN / dtex or more and a tensile elastic modulus of 500 cN / dtex or more. Further, when 1% tensile strain is applied to the rope core 1, that is, when 1% tensile strain is generated, the stress generated in the rope core 1 is 50 MPa or more.
  • the strain is a value based on the length when a load of 0.1 kN is applied to the rope core 1.
  • Examples of the fiber used for the load bearing part 3 include carbon fiber, polyparaphenylene benzoxazole fiber, aramid fiber, and polyarylate fiber. Although it does not specifically limit as a fiber used for the coating
  • the load bearing portion 3 has a role of sharing the load when a tensile load is applied to the elevator rope and reducing the load applied to the outer steel strand 2.
  • the covering portion 4 has a role of preventing the fibers of the load bearing portion 3 from coming into direct contact with the steel strand 2 and preventing the load bearing portion 3 from being damaged by friction.
  • the inter-fiber porosity of the load bearing part 3 is 17% or less.
  • the rope core 1 in which the inter-fiber porosity of the load bearing portion 3 is 17% or less generates a high load only by applying a slight distortion.
  • load strain curve In a curve showing the relationship between elongation and load when a synthetic fiber rope is pulled, so-called load strain curve, there are two-stage regions. In the initial stage of tension, there is a region called a structural elongation region, that is, a region where only a minute load is generated even when a tensile strain is applied. Further, when a tensile strain is applied, there is a region called a material elongation region, that is, a region where a high load is generated.
  • the structural elongation region depends on how the synthetic fiber rope is twisted, and the greater the twist angle, the greater the structural elongation.
  • the material elongation region depends on the physical properties of the fiber, and the higher the elastic modulus of the fiber used in the synthetic fiber rope, the higher the load generated per constant strain.
  • the structural elongation region is a stage where the gaps between the fibers of the synthetic fiber rope which is a fiber assembly are clogged. For this reason, in order to reduce a structural elongation area
  • Embodiment 1 by applying a predetermined tensile load to the rope core 1 once or a plurality of times, the inter-fiber porosity of the load bearing portion 3 is reduced to 17% or less.
  • the step of applying a predetermined tensile load may be performed after the rope core 1 is formed by the load bearing portion 3 and the covering portion 4 and before the steel strand 2 is wound around the outer periphery of the rope core 1. Alternatively, it may be performed on the load bearing part 3 before the outer periphery of the load bearing part 3 is covered with the coating part 4.
  • the tensile load can be applied once or a plurality of times by a pretensioning device for wire rope, for example.
  • the lower limit of the inter-fiber porosity is not particularly set, but is preferably 10% or more. If it is less than 10%, the plastic deformation of the cross-sectional shape of the fiber becomes large, which may affect the physical properties of the fiber. From these viewpoints, the inter-fiber porosity is preferably 10 to 17%, more preferably 10 to 15%, and particularly preferably 12 to 13%.
  • the value of the predetermined tensile load is not particularly limited, but is preferably 5 to 40%, more preferably 15 to 30% of the breaking load of the load bearing portion 3. If it is less than 5%, the fibers are not sufficiently aligned, and the inter-fiber porosity may not be sufficiently reduced. Moreover, when it exceeds 40%, a part of fiber may fracture
  • FIG. 3 shows the influence of the twist of the synthetic fiber rope and the void ratio between the fibers on the load strain curve.
  • black squares indicate data of a three-strand rope made of aramid fiber.
  • black circles indicate data of a rope in which fiber strands obtained by twisting aramid fibers are bundled and the inter-fiber porosity is 22%.
  • white circles show data on a rope in which a load of 30% of the breaking load is applied in advance to a rope bundled with fiber strands obtained by twisting aramid fibers and the inter-fiber porosity is 11%.
  • the rope with only the lower twist in which the influence of twisting is reduced generates a load in the low strain region as compared with the three-strike rope. It can also be seen that by reducing the inter-fiber porosity of the rope from 22% to 11%, a load is generated in a lower strain region, and a stress of 88 MPa is generated at 1% strain.
  • FIG. 4 compares a cross-sectional enlarged photograph of the load bearing part 3 of the rope core 1 with a 22% inter-fiber porosity and a cross-sectional enlarged photograph of the load bearing part 3 of the rope core 1 with an inter-fiber space ratio of 11%. It is explanatory drawing shown. From FIG. 4, it can be seen that the gap between the fibers can be greatly reduced by applying a load of 30% of the breaking load to the synthetic fiber rope in advance.
  • FIG. 5 is a graph showing the relationship between the inter-fiber void ratio of the load bearing portion 3 and the generated stress at 1% strain of the rope core 1 in a rope bundled with fiber strands obtained by twisting aramid fibers. From the relationship shown in FIG. 5, it can be seen that the inter-fiber porosity of the load bearing portion 3 may be reduced to 17% or less in order for the generated stress at 1% strain of the rope core 1 to be 50 MPa or more. Moreover, if the inter-fiber porosity of the load bearing part 3 is 15% or less, the generated stress at 1% strain of the rope core 1 can be stabilized to 50 MPa or more.
  • the inter-fiber porosity is measured by preparing a sample for cross-sectional observation under a load of 0.1 kN or less, and taking a cross-sectional observation image as shown in FIG. However, it should not be observed after the steel strand 2 is wound around the outer periphery. This is because, when observed after the steel strand 2 is wound around the outer periphery, the inter-fiber porosity may change due to the force from the outer periphery.
  • the sum of the fiber cross-sectional areas in the observation image as shown in FIG. 4 is A, and the area of the other part, that is, the area obtained by subtracting the sum of the fiber cross-sectional areas from the entire observation image is B.
  • B the area obtained by subtracting the sum of the fiber cross-sectional areas from the entire observation image.
  • a circular and dark portion is a fiber cross section.
  • the covering portion 4 is formed by winding a fiber around the outer periphery of the load bearing portion 3 or knitting with the fiber, and the rope core 1 of the first embodiment is completed.
  • the fibers of the covering portion 4 may be impregnated with elevator rope grease as necessary. By impregnating the fiber of the covering portion 4 with the rope grease, the rope grease can be supplied from the covering portion 4 to the steel strand 2 when used as an elevator rope, which is effective in suppressing rust of the steel strand 2. .
  • the elevator rope of the first embodiment has a structure in which eight steel strands 2 are wound around the rope core 1, for example, 8 ⁇ S (19), 8 ⁇ W (19) defined in JISG3525. Or 8 ⁇ Fi (25) structure.
  • the elevator rope composed of the rope core 1 having such a configuration and the steel strand 2 has 8 ⁇ S (19), 8 ⁇ W (19) having a conventional triple-strand synthetic fiber rope as the rope core 1.
  • the breaking load increases, and the mass specific strength (kN / kg / m) obtained by dividing the breaking strength (kN) by the weight per unit length (kg / m) is 160 kN / kg / m or more, preferably 180 kn / kg / m or more.
  • the generated load at 1% elongation increases, and the generated stress divided by the cross-sectional area calculated from the nominal rope diameter is 80MPa or more, more preferably 90MPa or more. is there.
  • the nominal rope diameter represents the diameter of the outer circumference of the elevator rope and is also referred to as the nominal rope diameter or the nominal rope diameter.
  • the weight reduction of the whole can be achieved by arrange
  • FIG. 6 is a side view showing an elevator rope according to Embodiment 2 of the present invention
  • FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG.
  • the load bearing portion 3 is impregnated with the flexible resin 5 and cured.
  • the flexible resin 5 a resin having a low viscosity before curing and having flexibility after curing is preferable. If the viscosity before curing is high, it is difficult to sufficiently impregnate the fibers of the load bearing portion 3. Moreover, if the flexibility after curing is poor, the entire rope core 1 becomes hard and the flexibility of the elevator rope is impaired.
  • the hardness of the flexible resin 5 after curing is desirably 50A to 70A.
  • the flexible resin 5 is preferably a resin that can be cured in a short time by some trigger from the viewpoint of manufacturing. From the above points, examples of the suitable flexible resin 5 include a two-component thermosetting urethane resin.
  • the process of impregnating the flexible resin 5 between the fibers of the load bearing portion 3 and curing it is performed, for example, as follows. First, in the step of making a fiber assembly of the load bearing portion 3, when bundling smaller units of fiber strands, the fiber strands are impregnated with a thermosetting flexible resin 5 before curing. Thereafter, the fiber strands are bundled while applying a load to the fiber strand, and subsequently heated while applying a tensile load to the fiber assembly to cure the resin. The tensile load to be applied is the same as in the first embodiment.
  • the inter-fiber porosity of the load bearing portion 3 is also the load burden when bent by winding during production and bending during use. It is possible to prevent an increase from returning to the value before applying the tensile load to the portion 3. That is, even when the elevator rope is bent by aligning the fibers of the load bearing portion 3 and impregnating and hardening the load resin 3 with the flexible resin 5 in a state in which the inter-fiber porosity is reduced. The relative positions of each other can be fixed, and the reduced inter-fiber space ratio can be maintained.
  • the resin used for the flexible resin 5 is not limited to the two-component thermosetting urethane resin.
  • the method of impregnating and curing the flexible resin 5 is not limited to the above example.
  • FIG. 8 is a side view showing an elevator rope according to Embodiment 3 of the present invention
  • FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG.
  • the rope core 1 of Embodiment 3 has a load bearing portion 3 disposed at the center and a synthetic resin coating portion 6 that is coated on the outer periphery of the load bearing portion 3 by extrusion molding.
  • the synthetic resin used for the covering portion 6 a resin having high flexibility and wear resistance and a low coefficient of friction is preferable. If the flexibility is poor, the coated rope core 1 and the elevator rope using the rope core 1 are difficult to bend, and the covering portion 6 may be damaged by repeated bending. Moreover, when abrasion resistance is low, the coating
  • the synthetic resin used for the covering portion 6 a resin that can be molded at a temperature lower than the melting point of the fiber used in the load bearing portion 3 is preferable.
  • suitable resins used for the covering portion 6 include polyethylene and polypropylene.
  • the covering portion 6 When forming the covering portion 6 on the outer periphery of the load bearing portion 3, it can be formed by the same method as a method of covering a linear object such as an electric wire with a resin using an extruder. Other configurations and manufacturing methods are the same as those in the first embodiment.
  • the covering portion 6 can be formed on the outer periphery of the load bearing portion 3 in a shorter time, and the productivity of the rope core 1 is improved. Can do.
  • coated part 6 is not limited to said example.
  • FIG. 10 is a side view showing an elevator rope according to Embodiment 4 of the present invention
  • FIG. 11 is a sectional view taken along line XI-XI in FIG.
  • the load bearing part 3 is impregnated with the flexible resin 5 and cured. Further, the outer periphery of the load bearing portion 3 is covered with a covering portion 6 by extrusion molding. That is, the fourth embodiment is a combination of the second embodiment and the third embodiment.
  • Such an elevator rope can obtain the same effects as those of the second and third embodiments.
  • FIG. 12 is a side view showing an elevator rope according to Embodiment 5 of the present invention
  • FIG. 13 is a sectional view taken along line XIII-XIII in FIG.
  • 12 steel strands 2 are wound around the outer periphery of the rope core 1.
  • the configuration of the rope core 1 is the same as that of the second embodiment in FIG. 12, but may be the same as that of the first, third, or fourth embodiment. Other configurations and manufacturing methods are the same as those in the first to fourth embodiments.
  • the ratio of the cross-sectional area of the steel strand 2 to the cross-sectional area of the elevator rope is lower than that of the structure in which the eight steel strands 2 shown in the first to fourth embodiments are wound.
  • the elevator rope is lightened. Specifically, when 8 steel strands 2 are used, the above-mentioned cross-sectional area ratio is 46%, and when 12 steel strands 2 are used, the above-mentioned cross-sectional area ratio is 36%. .
  • the sectional area of the elevator rope is calculated from the nominal diameter of the rope.
  • the diameter of the rope core 1 can be increased even with an elevator rope having the same diameter as the ratio of the cross-sectional area of the steel strand 2 is reduced, and the load applied to the rope core 1 is increased. Can do. As a result, the mass specific strength of the elevator rope can be further improved.
  • the ratio of the total cross-sectional area of the steel strand 2 to the cross-sectional area of the entire rope is particularly preferably 40% or less.
  • the ratio of the cross-sectional area of the steel strand 2 is further reduced using the 13 or more steel strands 2, and an elevator is used. It is also possible to further reduce the weight of the rope.
  • FIG. 14 is a side view showing an elevator rope according to Embodiment 6 of the present invention
  • FIG. 15 is a cross-sectional view taken along XV-XV in FIG.
  • the load bearing part 3 of the rope core 1 has a structure in which a fiber that has been twisted is further twisted.
  • the length when the load bearing part 3 is linear is L, and the length when the load twisting part 3 is untwisted to form the straight-twisted fiber constituting the load bearing part 3
  • L0 is L0
  • L0 ⁇ L is 1.1 or less.
  • whether the load bearing portion 3 is a bundle of fibers obtained by twisting fibers and whether L0 ⁇ L is twisted at 1.1 or less. It is different in that.
  • the method of twisting the under-twisted fiber includes three-stroke or eight-beat.
  • the load bearing portion 3 may be impregnated and cured with a flexible resin.
  • the covering portion may be made of synthetic fiber as in the first and second embodiments, or may be made of synthetic resin extruded as in the third and fourth embodiments. Further, eight steel strands may be wound around the rope core 1 as in the first to fourth embodiments, and twelve steel strands may be wound around the rope core 1 as in the fifth embodiment. It may be attached.
  • the load bearing portion 3 has a structure in which the fiber that has been twisted is further twisted by, for example, three-stroke or eight-beat, so that the fiber may fray during production, When winding up, it does not become extremely flat and the cross-sectional shape does not collapse. Moreover, since L0 / L is 1.1 or less, the generated stress at 1% strain of the rope core 1 is increased, and the above manufacturing problems are less likely to occur.
  • Embodiments 1 to 6 can be applied to elevator ropes having any outer diameter. Moreover, the outer diameter of the rope core 1 is appropriately set with respect to the outer diameter of the elevator rope. Furthermore, the wire configuration of each steel strand 2 is not particularly limited. Furthermore, the configuration of the present invention can be applied not only to the main rope that suspends the car and the counterweight but also to the compen- sion rope that is suspended from the car and the counterweight.
  • Example 1 Para-aramid fiber Kevlar 129 (manufactured by Toray DuPont) 1670 dtex twisted yarn is twisted and 3 twisted yarns are bundled into 12 strands, and 8 strands are bundled into load bearing portion 3 .
  • a rope core 1 was produced.
  • the load of 30% of the breaking load value of the load bearing portion 3 was applied to the rope core 1 over the entire length of the rope core 1. Then, eight steel strands 2 were wound around the outer periphery of the rope core 1 after applying a load of 30% of the design breaking load value twice, with a 50 kgf load applied to the rope core 1. 1 ⁇ 14mm 8 ⁇ S (19) elevator rope was obtained. The ratio of the cross-sectional area of the steel strand 2 to the rope cross-sectional area calculated from the rope nominal diameter of 14 mm was 46%.
  • Example 2 Para-aramid fiber Kevlar 129 (manufactured by Toray DuPont) 1670 dtex twisted yarn is twisted and 3 twisted yarns are bundled into 12 strands, and 8 strands are bundled into load bearing portion 3 .
  • the load bearing part 3 is impregnated with a two-component mixed polyurethane flexible resin 5, HysolU-10FL (Henkel), and a load of 30% of the breaking load value of the load bearing part 3 is applied.
  • the flexible resin 5 was cured by heating at 150 ° C. for 5 minutes.
  • polyester fiber Tetoron 1670T-360-705M Toray Industries, Inc. 1670dtex twisted yarn is twisted six times, and the six twisted yarns are wound around the outer periphery of the load bearing portion 3 to form a covering portion 4 having a diameter of 10 mm.
  • a rope core 1 was produced.
  • the eight steel strands 2 were wound around the outer periphery of the rope core 1 with a load of 50 kgf applied to the rope core 1 to obtain an 8 ⁇ S (19) elevator rope having a diameter of 14 mm of Example 2.
  • the ratio of the cross-sectional area of the steel strand 2 to the rope cross-sectional area calculated from the rope nominal diameter of 14 mm was 46%.
  • Example 3 High-density polyethylene with a thickness of 0.5 to 1 mm on the outer periphery of the load bearing portion 3 by extrusion coating of Novatec HE121 (manufactured by Nippon Polyethylene), which is a high-density polyethylene, without using the polyester fiber Tetron Except having provided the coating
  • Novatec HE121 manufactured by Nippon Polyethylene
  • Example 4 High-density polyethylene with a thickness of 0.5 to 1 mm on the outer periphery of the load bearing portion 3 by extrusion coating of Novatec HE121 (manufactured by Nippon Polyethylene), which is a high-density polyethylene, without using the polyester fiber Tetron Except having provided the coating
  • Novatec HE121 manufactured by Nippon Polyethylene
  • Embodiment 5 FIG. Para type aramid fiber Kevlar 129 (manufactured by Toray DuPont) 1670dtex, 3 strands are twisted, 16 strands are bundled into 16 strands, 8 strands are bundled into load bearing section 3 .
  • the load bearing part 3 is impregnated with a two-component mixed polyurethane flexible resin 5, HysolU-10FL (Henkel), and a load of 30% of the breaking load value of the load bearing part 3 is applied.
  • the flexible resin 5 was cured by heating at 150 ° C. for 5 minutes.
  • polyester fiber Tetron 1670T-360-705M manufactured by Toray Industries, Inc. 1670dtex is twisted 6 times, and the 6 twisted yarns are wound around the outer periphery of the load bearing part 3 to form a covering part 4 having a diameter of 12 mm.
  • a rope core 1 was produced.
  • the 12 steel strands 2 were wound around the outer periphery of the rope core 1 with a load of 50 kgf applied to the rope core 1 to obtain a 12 ⁇ S (19) elevator rope of ⁇ 14 mm of Example 5.
  • the ratio of the cross-sectional area of the steel strand 2 to the rope cross-sectional area calculated from the rope nominal diameter of 14 mm was 36%.
  • Example 6 Para type aramid fiber Kevlar 129 (manufactured by Toray DuPont) 1670dtex twisted yarn is twisted, 3 twisted yarns are bundled into 16 strands, and 8 strands are twisted in eight and loaded It was set as the burden part 3.
  • the load bearing part 3 is impregnated with a two-component mixed polyurethane flexible resin 5, HysolU-10FL (Henkel), and a load of 30% of the breaking load value of the load bearing part 3 is applied.
  • the flexible resin 5 was cured by heating at 150 ° C. for 5 minutes.
  • polyester fiber Tetron 1670T-360-705M manufactured by Toray Industries, Inc. 1670dtex is twisted 6 times, and the 6 twisted yarns are wound around the outer periphery of the load bearing part 3 to form a covering part 4 having a diameter of 12 mm.
  • a rope core 1 was produced.
  • Comparative Example 1 Comparative Example 1 in the same manner as in Example 1 except that the step of applying a load of 30% of the breaking load value of the load bearing part 3 over the entire length of the rope core 1 to the rope core 1 was omitted. The elevator rope was obtained.
  • Comparative Example 2 Except that the fiber used for the load bearing part 3 is not the para-aramid fiber Kevlar 129 (Toray DuPont) 1670dtex, but the polyester fiber Tetron 1670T-360-705M (Toray) 1670dtex In the same manner as in Example 1, an elevator rope of Comparative Example 2 was obtained.
  • the fiber used for the load bearing part 3 is not the para-aramid fiber Kevlar 129 (Toray DuPont) 1670dtex, but the polyester fiber Tetron 1670T-360-705M (Toray) 1670dtex.
  • the inter-fiber space ratio of the load bearing portion 3 before winding the steel strand 2 was calculated from cross-sectional observation. Moreover, the generated load (kN) and the breaking load (kN) at the time of 1% strain were measured for the completed elevator rope. Further, the mass specific strength (kN / g / m) was calculated by dividing the breaking load (kN) by the unit mass (g / m). The results are shown in FIG.
  • the physical properties of the fiber materials used in Examples 1 to 6 and Comparative Examples 1 and 2 were as follows. That is, Para-type aramid fiber Kevlar 129 (Toray DuPont) 1670dtex Tensile strength: 23.4cN / dtex Tensile modulus: 670cN / dtex Polyester fiber Tetoron 1670T-360-705M (Toray Industries, Inc.) 1670dtex Tensile strength: 8.1cN / dtex Tensile modulus: 90cN / dtex
  • Comparative Example 2 the inter-fiber void ratio is lowered, but since no high-strength and high-modulus fiber is used, the generated stress at 1% strain of the rope core 1 can be increased. It is thought that it was not possible.
  • Example 2 is slightly more than Example 1 or Example 4 is slightly less than Example 3.
  • the reason why the generated stress at 1% strain is high is considered as follows. That is, in the manufacturing process, there is a step of winding around a drum or the like after applying a tensile load of 30% of the breaking load value of the load bearing portion 3.
  • Example 1 and Example 3 since the load bearing part 3 is not impregnated with the flexible resin 5, the inter-fiber porosity of the load bearing part 3 reduced by applying the tensile load is reduced in the winding process. It is thought that this is because the load bearing portion has been slightly raised due to bending.
  • Example 2 and Example 4 since the load bearing part 3 was impregnated with the flexible resin 5, it is considered that the inter-fiber void ratio of the load bearing part 3 did not easily increase even after the winding process.
  • Example 5 since the ratio of the cross-sectional area of the steel strand 2 is lower than in Examples 1 to 4, the generated load and breaking load when the elevator rope is 1% strained are shown in Example 1. Compared to -4, it is lower. However, since the ratio of the cross-sectional area of the steel strand 2 is low, the unit mass of the elevator rope is light, and it can be seen that the mass specific strength is higher than in Examples 1 to 4.

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  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Ropes Or Cables (AREA)
PCT/JP2016/085404 2016-02-10 2016-11-29 エレベータロープ及びその製造方法 WO2017138228A1 (ja)

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KR1020187008697A KR20180048820A (ko) 2016-02-10 2016-11-29 엘리베이터 로프 및 그 제조 방법
DE112016006384.9T DE112016006384T5 (de) 2016-02-10 2016-11-29 Fahrstuhl-Seil und zugehöriges Herstellungsverfahren
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JP6414370B1 (ja) * 2018-03-19 2018-10-31 三菱電機株式会社 エレベータロープ
CN109403107A (zh) * 2018-12-28 2019-03-01 江苏赛福天钢索股份有限公司 一种耐弯曲钢丝绳
WO2022044213A1 (ja) * 2020-08-27 2022-03-03 三菱電機株式会社 ベルト、その製造方法、及びエレベーター
JPWO2022079835A1 (zh) * 2020-10-14 2022-04-21
JP7195483B1 (ja) * 2022-02-17 2022-12-23 三菱電機株式会社 ロープ及びそれを用いたベルト
KR20230073278A (ko) 2020-11-09 2023-05-25 미쓰비시덴키 가부시키가이샤 복합 스트랜드, 그 제조 방법, 로프, 벨트, 및 엘리베이터

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CN109403107A (zh) * 2018-12-28 2019-03-01 江苏赛福天钢索股份有限公司 一种耐弯曲钢丝绳
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JPWO2022044213A1 (zh) * 2020-08-27 2022-03-03
JP7357803B2 (ja) 2020-08-27 2023-10-06 三菱電機株式会社 ベルト、その製造方法、及びエレベーター
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WO2022079835A1 (ja) * 2020-10-14 2022-04-21 三菱電機株式会社 エレベータ用ロープ
KR20230073278A (ko) 2020-11-09 2023-05-25 미쓰비시덴키 가부시키가이샤 복합 스트랜드, 그 제조 방법, 로프, 벨트, 및 엘리베이터
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JP7195483B1 (ja) * 2022-02-17 2022-12-23 三菱電機株式会社 ロープ及びそれを用いたベルト
WO2023157165A1 (ja) * 2022-02-17 2023-08-24 三菱電機株式会社 ロープ及びそれを用いたベルト

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KR20180048820A (ko) 2018-05-10
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DE112016006384T5 (de) 2018-11-22
CN108698797A (zh) 2018-10-23

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