CN116323458A

CN116323458A - Elevator rope and method for manufacturing same

Info

Publication number: CN116323458A
Application number: CN202080105933.0A
Authority: CN
Inventors: 内藤晋也; 肥田政彦; 野口丰弘
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2023-06-23
Also published as: DE112020007686T5; JPWO2022079836A1; WO2022079836A1; KR20230044028A

Abstract

Provided is an elevator rope for suspending a car in an elevator, comprising: a steel core composed of a steel strand or a single steel wire formed by twisting a plurality of steel wires; a first fiber layer composed of high-strength synthetic fibers arranged on the outer periphery of the steel core; and a first wire layer formed by winding a plurality of twisted steel wires or a single wire around the outer periphery of the first fiber layer. According to this rope for an elevator, a rope for an elevator containing high-strength synthetic fibers and having low ovality can be easily manufactured.

Description

Elevator rope and method for manufacturing same

Technical Field

The present disclosure relates to an elevator rope for suspending a car in an elevator and a method of manufacturing the same.

Background

With the rise of buildings, the lift of elevators has been increasing. In a high-lift elevator, since the diameter and length of the elevator rope used become large, a lightweight and high-strength rope is required. Accordingly, a method of using a lightweight and strong high-strength synthetic fiber for the core of an elevator rope is known.

Patent document 1 discloses a method of manufacturing an elevator rope by arranging a fiber core made of high-strength synthetic fibers in the center and winding steel strands around the outer periphery thereof.

Prior art literature

Patent literature

Patent document 1: international publication No. 2017/064808

Disclosure of Invention

Problems to be solved by the invention

However, in the production of a fiber core made of high-strength synthetic fibers, for example, high-strength fiber yarns obtained by bundling a plurality of high-strength synthetic fibers having diameters of several μm to several tens of μm are arranged in a large number or twisted to form a fiber core, and the entire cross-sectional shape thereof is made circular. In this case, the high-strength fiber yarn is slightly loosely twisted so that the fiber core can sufficiently bear a tensile load applied to the elevator rope during elevator operation. However, since the high-strength fiber yarn is thin and soft, the shape tends to be lost when loosely twisted, and it is not easy to produce a round core material, and there is a case where the fiber yarn becomes oval. If the ovality of the core material is high, ovality of the rope around which the steel strand is wound is also high, and if the ovality is high, there is a possibility that the life of the rope is reduced.

Accordingly, an object of the present disclosure is to provide an elevator rope having a structure capable of easily manufacturing an elevator rope having low ovality and containing high-strength synthetic fibers, and a method for manufacturing the same.

Means for solving the problems

The elevator rope of the present disclosure includes: a steel core composed of a steel strand or a single steel wire formed by twisting a plurality of steel wires; a first fiber layer composed of high-strength synthetic fibers arranged on the outer periphery of the steel core; and a first wire layer formed by winding a plurality of twisted steel wires or a single wire around the outer periphery of the first fiber layer.

The method for manufacturing the elevator rope comprises the following steps: forming a first fiber layer by disposing a plurality of fiber bundles made of high-strength synthetic fibers on the outer periphery of a steel core made of a steel strand formed by twisting a plurality of steel wires or a single steel wire; and winding a plurality of steel strands or single steel wires formed by twisting a plurality of steel wires around the outer periphery of the first fiber layer to form a first steel wire layer.

Effects of the invention

According to the elevator rope and the method for manufacturing the same of the present disclosure, it is possible to easily manufacture an elevator rope with low ovality, which comprises high-strength synthetic fibers.

Drawings

Fig. 1 is a cross-sectional view perpendicular to the longitudinal direction of an elevator rope according to a first embodiment.

Fig. 2 is a side view showing a state in which the layers of the elevator rope according to the first embodiment are cut in sequence.

Fig. 3 is a cross-sectional view perpendicular to the longitudinal direction of an elevator rope according to a modification of the first embodiment.

Fig. 4 is a side view showing a state in which the layers of the elevator rope according to the first modification of the first embodiment are cut in sequence.

Fig. 5 is a side view showing a state in which the layers of the elevator rope according to the second modification of the first embodiment are cut in sequence.

Fig. 6 is a cross-sectional view perpendicular to the longitudinal direction of the elevator rope according to the second embodiment.

Fig. 7 is a cross-sectional view perpendicular to the longitudinal direction of an elevator rope according to a modification of the second embodiment.

Fig. 8 is a cross-sectional view perpendicular to the longitudinal direction of the elevator rope according to the third embodiment.

Fig. 9 is a cross-sectional view perpendicular to the longitudinal direction of an elevator rope according to a first modification of the third embodiment.

Fig. 10 is a cross-sectional view perpendicular to the longitudinal direction of an elevator rope according to a second modification of the third embodiment.

Fig. 11 is a cross-sectional view perpendicular to the longitudinal direction of the elevator rope according to the fourth embodiment.

Fig. 12 is a cross-sectional view perpendicular to the longitudinal direction of an elevator rope according to a modification of the fourth embodiment.

Fig. 13 is a cross-sectional view perpendicular to the longitudinal direction of an elevator rope according to the fifth embodiment.

Fig. 14 is a cross-sectional view perpendicular to the longitudinal direction of an elevator rope according to a modification of the fifth embodiment.

Fig. 15 is a cross-sectional view perpendicular to the longitudinal direction of an elevator rope according to a sixth embodiment.

Fig. 16 is a cross-sectional view perpendicular to the longitudinal direction of an elevator rope according to a modification of the sixth embodiment.

Detailed Description

First embodiment

The elevator rope 100 according to the first embodiment will be described below. Fig. 1 is a cross-sectional view showing a cross section of an elevator rope 100 perpendicular to the longitudinal direction. Fig. 2 is a side view showing a state in which the layers of the elevator rope 100 are cut in sequence.

As shown in fig. 1 and 2, the elevator rope 100 includes a steel core 11 and a first fiber layer 12 made of high-strength synthetic fibers disposed on the outer periphery of the steel core 11. Further, a first wire layer 13 formed by winding a plurality of first steel strands 13n is provided on the outer periphery of the first fiber layer 12.

The steel core 11 is constituted by a steel strand formed by twisting a plurality of steel wires. The steel core 11 is composed of a core wire 11a and 6 side wires 11b wound around the outer periphery of the core wire 11 a. The core wire 11a and the side wire 11b are each composed of steel wires.

The first fiber layer 12 is a layer made of high-strength synthetic fibers arranged on the outer periphery of the steel core 11. The first fiber layer 12 is formed by twisting a plurality of fiber bundles, each of which is made of high-strength synthetic fibers. As the high-strength synthetic fiber, for example, carbon fiber, glass fiber, poly-p-Phenylene Benzobisoxazole (PBO) fiber, aromatic polyamide fiber, polyarylate fiber, basalt fiber, or the like is used. The respective fiber bundles may be, for example, fiber bundles which are cured and integrated with a resin such as an epoxy resin or a urethane resin, or fiber bundles which are coated with a resin.

The first wire layer 13 is formed by winding a plurality of first strands 13n formed by twisting a plurality of wires around the outer periphery of the first fiber layer 12. In the example shown in fig. 1, 8 first steel strands 13n are wound around the outer periphery of the first fiber layer 12. Each first stranded wire 13n has a core wire 13a, 9 first side wires 13b wound around the outer periphery of the core wire 13a, and 9 second side wires 13c wound around the outer periphery of the first side wires 13 b. The core wire 13a, the first side wire 13b, and the second side wire 13c are each formed of steel wire. In the first embodiment, the first wire layer 13 is located at the outermost layer of the elevator rope 100 and is exposed to the outside.

In manufacturing the elevator rope 100, first, a plurality of fiber bundles made of high-strength synthetic fibers are arranged on the outer periphery of a steel core 11 made of steel strands formed by twisting a plurality of steel wires to form a first fiber layer 12. Specifically, a plurality of fiber bundles are twisted so as to follow the outer peripheral surface of the steel core 11, thereby forming the first fiber layer 12. At this time, in order to sufficiently bear the tensile load applied to the elevator rope by the first fiber layer 12, the plurality of fiber bundles are slightly loosely twisted, but since the steel core 11 is used as the core material, the shape at the time of twisting is not likely to be deformed, and the first fiber layer 12 is likely to be formed. Thereafter, a plurality of first steel strands 13n formed by twisting a plurality of steel wires are wound around the outer periphery of the first fiber layer 12 to form a first steel wire layer 13.

As described above, the elevator rope 100 includes: a steel core 11; a first fiber layer 12 composed of high-strength synthetic fibers arranged on the outer periphery of the steel core 11; and a first wire layer 13 formed by winding a plurality of steel strands around the outer periphery of the first fiber layer 12. This makes it possible to easily form the first fiber layer 12 using the steel core 11 as a core material, and to easily manufacture an elevator rope having low ovality, which includes high-strength synthetic fibers.

Further, although it is preferable to provide the elevator with a weight compensation rope (or chain) as the lifting height of the elevator increases, the weight compensation rope (or chain) can be further reduced or completely eliminated by including high-strength synthetic fibers according to the elevator rope 100, and thus the weight can be reduced.

In the first embodiment, the case where the first fiber layer 12 is formed by a plurality of fiber bundles outside Zhou Niange of the steel core 11 has been described, but the first fiber layer 12 may be formed by knitting a plurality of fiber bundles, or may be formed by bundling a plurality of fiber bundles in a substantially parallel arrangement.

In the first embodiment, the structure (number, arrangement, etc. of steel wires) of the steel strands constituting the steel core 11 may be appropriately changed. The number of the first steel strands 13n constituting the first wire layer 13 and the structure (number, arrangement, etc. of the wires) of each first steel strand 13n may be appropriately changed.

[ first modification of the first embodiment ]

An elevator rope 101 as a first modification of the first embodiment will be described below. Fig. 3 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the elevator rope 101. Fig. 4 is a side view showing a state in which the layers of the elevator rope 101 are cut in sequence.

As shown in fig. 3 and 4, the elevator rope 101 is different from the first embodiment in that it includes a resin coating layer 18 as an outermost layer. That is, in the elevator rope 100 according to the first embodiment, the first wire layer 13 is exposed to the outside as the outermost layer of the elevator rope 100. In contrast, in the elevator rope 101 of this modification, the outer periphery of the first wire layer 13 is coated with the coating layer 18. This improves the abrasion resistance and durability of the elevator rope 101. Cladding 18 enters between first steel strands 13n adjacent to each other. As a material of the coating layer 18, a resin having a sufficient coefficient of friction, for example, an elastomer-based resin, polyurethane, or the like is used in order to secure traction ability with the sheave.

Further, although it is preferable to provide the elevator with a weight compensation rope (or chain) as the lifting height of the elevator increases, the elevator rope 101 can be made lightweight by including high-strength synthetic fibers, and can suppress slip with the sheave by increasing the friction coefficient with the sheave, thereby enabling stable power transmission. As a result, the number and mass of the weight compensating ropes (or chains) can be further reduced or completely eliminated.

[ second modification of the first embodiment ]

An elevator rope 102 as a second modification of the first embodiment will be described below. Fig. 5 is a cross-sectional view showing a cross section of the elevator rope 102 perpendicular to the longitudinal direction. The elevator rope 102 is different from the first embodiment in that a buffer layer made of resin is provided between the steel core 11 and the first fiber layer 12 and between the first fiber layer 12 and the first wire layer 13. In the following description, this difference will be described, and the same configuration as in the first embodiment will be omitted.

As shown in fig. 5, the elevator rope 102 has a first buffer layer 19a made of resin between the steel core 11 and the first fiber layer 12. This can suppress abrasion of the first fiber layer 12 due to direct contact between the steel core 11 and the first fiber layer 12. Further, a second buffer layer 19b made of resin is provided between the first fiber layer 12 and the first wire layer 13. This can suppress abrasion of the first fiber layer 12 due to direct contact between the first fiber layer 12 and the first wire layer 13. As the material of the first buffer layer 19a and the second buffer layer 19b, a resin having abrasion resistance and low friction, such as polyethylene, polypropylene, or the like, is used.

In the second modification of the first embodiment, a case has been described in which a buffer layer made of resin is provided between the steel core 11 and the first fiber layer 12 and between the first fiber layer 12 and the first wire layer 13, respectively. However, the buffer layer may be provided only at any 1 of them instead. This can suppress abrasion of the first fiber layer 12 at the portion where the buffer layer is provided. That is, a buffer layer may be provided between the steel core 11 and the first fiber layer 12 and at least 1 between the first fiber layer 12 and the first wire layer 13.

Second embodiment

The elevator rope 200 according to the second embodiment will be described below. Fig. 6 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the elevator rope 200. The elevator rope 200 is different from the first embodiment in that the steel core 21 is composed of a single steel wire. In contrast, in the first embodiment, the steel core 11 is constituted by a steel strand formed by twisting a plurality of steel wires. Otherwise, the first embodiment is the same as the first embodiment, and therefore, a description thereof is omitted here.

In the second embodiment, a buffer layer may be provided between the steel core 21 and the first fiber layer 12 and between the first fiber layer 12 and the first wire layer 13 at least at 1.

Modification of the second embodiment

An elevator rope 201 as a modification of the second embodiment will be described below. Fig. 7 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the elevator rope 201. As shown in fig. 7, an elevator rope 201 differs from the second embodiment in that it includes a resin coating layer 28 as an outermost layer. That is, in the elevator rope 200 of the second embodiment, the first wire layer 13 is exposed to the outside as the outermost layer of the elevator rope 200. In contrast, in the elevator rope 201 of this modification, the outer periphery of the first wire layer 13 is coated with the coating layer 28. This improves the wear resistance and durability of the elevator rope 201.

The cladding 28 enters between the first steel strands 13n adjacent to each other. As a material of the coating layer 28, a resin having a sufficient coefficient of friction, for example, an elastomer-based resin, polyurethane, or the like is used in order to secure traction with the sheave.

Third embodiment

The elevator rope 300 according to the third embodiment will be described below. Fig. 8 is a cross-sectional view showing a cross section of the elevator rope 300 perpendicular to the longitudinal direction.

As shown in fig. 8, the elevator rope 300 includes a steel core 31 and a first fiber layer 32 composed of high-strength synthetic fibers disposed on the outer periphery of the steel core 31. Further, a first wire layer 33 formed by winding a plurality of first steel strands 33n is provided on the outer periphery of the first fiber layer 32. Further, the second fiber layer 34 is composed of high-strength synthetic fibers arranged on the outer periphery of the first wire layer 33. Further, a second wire layer 35 formed by winding a plurality of second steel strands 35n is provided on the outer periphery of the second fiber layer 34.

The steel core 31 is constituted by a steel strand formed by twisting a plurality of steel wires. The steel core 31 is composed of a core wire and 6 side wires wound around the outer periphery of the core wire. The core wire and the side wire are both composed of steel wires.

The first fiber layer 32 is a layer made of high-strength synthetic fibers arranged on the outer periphery of the steel core 31. The first fiber layer 32 is formed by twisting a plurality of fiber bundles, each of which is made of high-strength synthetic fibers. As the high-strength synthetic fiber, for example, carbon fiber, glass fiber, poly-p-Phenylene Benzobisoxazole (PBO) fiber, aromatic polyamide fiber, polyarylate fiber, basalt fiber, or the like is used. The respective fiber bundles may be, for example, fiber bundles which are cured and integrated with a resin such as an epoxy resin or a urethane resin, or fiber bundles which are coated with a resin.

The first wire layer 33 is formed by winding a plurality of first strands 33n formed by twisting a plurality of wires around the outer periphery of the first fiber layer 32. In the example shown in fig. 8, 12 first steel strands 33n are wound around the outer periphery of the first fiber layer 32. Each first steel strand 33n is composed of a core wire and 6 side wires wound around the outer periphery of the core wire. The core wire and the side wire are both composed of steel wires.

The second fiber layer 34 is a layer made of high-strength synthetic fibers arranged on the outer periphery of the first wire layer 33. The second fiber layer 34 is formed by twisting a plurality of fiber bundles, each of which is made of high-strength synthetic fibers. As the high-strength synthetic fiber, for example, carbon fiber, glass fiber, poly-p-Phenylene Benzobisoxazole (PBO) fiber, aromatic polyamide fiber, polyarylate fiber, basalt fiber, or the like is used. The respective fiber bundles may be, for example, fiber bundles which are cured and integrated with a resin such as an epoxy resin or a urethane resin, or fiber bundles which are coated with a resin.

The second wire layer 35 is formed by winding a plurality of second strands 35n formed by twisting a plurality of wires around the outer periphery of the second fiber layer 34. In the example shown in fig. 8, 12 second steel strands 35n are wound around the outer periphery of the second fiber layer 34. Each second steel strand 35n has a core wire, 9 first side wires wound around the outer periphery of the core wire, and 9 second side wires wound around the outer periphery of the first side wires. The core wire, the first side wire and the second side wire are all composed of steel wires. In the third embodiment, the second wire layer 35 is located at the outermost layer of the elevator rope 300 and is exposed to the outside.

In manufacturing the elevator rope 300, first, a plurality of fiber bundles made of high-strength synthetic fibers are arranged on the outer periphery of the steel core 31 made of steel strands formed by twisting a plurality of steel wires to form the first fiber layer 32. Specifically, a plurality of fiber bundles are twisted so as to follow the outer peripheral surface of the steel core 31, thereby forming the first fiber layer 32. At this time, in order to sufficiently bear the tensile load applied to the elevator rope by the first fiber layer 32, the plurality of fiber bundles are slightly loosely twisted, but since the steel core 31 is used as the core material, the shape at the time of twisting is not likely to be deformed, and the first fiber layer 32 is likely to be formed. Thereafter, a plurality of first strands 33n formed by twisting a plurality of steel wires are wound around the outer periphery of the first fiber layer 32 to form a first steel wire layer 33.

Thereafter, a plurality of fiber bundles made of high-strength synthetic fibers are arranged on the outer periphery of the first wire layer 33 to form a second fiber layer 34. Specifically, the plurality of fiber bundles are twisted so as to follow the outer peripheral surface of the first wire layer 33, thereby forming the second fiber layer 34. Thereafter, a plurality of second steel strands 35n formed by twisting a plurality of steel wires are wound around the outer periphery of the second fiber layer 34, thereby forming a second steel wire layer 35.

As described above, the elevator rope 300 includes: a steel core 31; a first fiber layer 32 composed of high-strength synthetic fibers arranged on the outer periphery of the steel core 31; and a first wire layer 33 formed by winding a plurality of steel strands around the outer periphery of the first fiber layer 32. Thus, the first fiber layer 32 can be easily formed using the steel core 31 as a core material, and the elevator rope having low ovality including high-strength synthetic fibers can be easily manufactured. The elevator rope 300 further includes: a second fiber layer 34 composed of high-strength synthetic fibers arranged on the outer periphery of the first wire layer 33; and a second wire layer 35 formed by winding a plurality of steel strands around the outer periphery of the second fiber layer 34. I.e. 2 fibre layers are provided. This can increase the amount of high-strength synthetic fibers used and reduce the weight.

Further, although it is preferable to provide the weight compensating rope (or chain) in the elevator as the lifting height of the elevator increases, according to the elevator rope 300, the weight can be reduced as compared with the conventional elevator rope by using a plurality of fiber layers to contain a large amount of high-strength synthetic fibers, and the number and the mass of the weight compensating rope (or chain) can be further reduced or completely removed.

In the third embodiment, the case where the first fiber layer 32 and the second fiber layer 34 are formed by a plurality of fiber bundles on the outer side Zhou Niange of the steel core 31 has been described, but the first fiber layer 32 and the second fiber layer 34 may be formed by knitting a plurality of fiber bundles, or may be formed by bundling a plurality of fiber bundles in a substantially parallel arrangement.

In the third embodiment, the structure (number, arrangement, etc. of steel wires) of the steel strands constituting the steel core 31 may be appropriately changed. The number of the first strands 33n constituting the first wire layer 33 and the structure (number, arrangement, etc. of the wires) of each first strand 33n may be appropriately changed. The number of the second steel strands 35n constituting the second wire layer 35 and the structure (number, arrangement, etc. of the wires) of each second steel strand 35n may be appropriately changed.

In the third embodiment, a buffer layer made of resin may be provided between the steel core 31 and the first fiber layer 32, between the first fiber layer 32 and the first wire layer 33, between the first wire layer 33 and the second fiber layer 34, and between the second fiber layer 34 and the second wire layer 35 at least 1. This can suppress abrasion of the first fiber layer 32 or the second fiber layer 34 at the portion where the buffer layer is provided. In this case, as a material of the buffer layer, a resin having abrasion resistance and low friction, such as polyethylene, polypropylene, or the like, can be used.

[ first modification of the third embodiment ]

An elevator rope 301 as a modification of the third embodiment will be described below. Fig. 9 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the elevator rope 301. As shown in fig. 9, an elevator rope 301 differs from the third embodiment in that it includes a resin coating layer 38 as an outermost layer. That is, in the elevator rope 300 according to the third embodiment, the second wire layer 35 is exposed to the outside as the outermost layer of the elevator rope 300. In contrast, in the elevator rope 301 of this modification, the outer periphery of the second wire layer 35 is covered with the covering layer 38. This improves the abrasion resistance and durability of the elevator rope 301.

The cladding 38 enters between the second strands 35n adjacent to each other. As a material of the coating layer 38, a resin having a sufficient coefficient of friction, for example, an elastomer-based resin, polyurethane, or the like is used in order to secure traction with the sheave.

Further, although it is preferable to provide the elevator with a weight compensation rope (or chain) as the elevator height increases, the elevator rope 301 contains a large amount of high-strength synthetic fibers by using a plurality of fiber layers, thereby realizing weight reduction as compared with the conventional elevator rope, suppressing slip between the elevator rope and the sheave by increasing the friction coefficient with the sheave, and enabling stable power transmission. As a result, the number and mass of the weight compensating ropes (or chains) can be further reduced or completely eliminated.

[ second modification of the third embodiment ]

An elevator rope 302 as a modification of the third embodiment will be described below. Fig. 10 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the elevator rope 302. As shown in fig. 10, the elevator rope 302 differs from the third embodiment in that it has a resin coating 39 for coating each first stranded wire 33n of the first wire layer 33, and is not substantially different from the third embodiment in other respects. This can suppress abrasion of the first fiber layer 32 due to direct contact between the first fiber layer 32 and the first wire layer 33. Further, abrasion of the second fiber layer 34 caused by direct contact of the first wire layer 33 and the second fiber layer 34 can be suppressed. As a material of the coating body 49, a resin having abrasion resistance and low friction is used, for example, polyethylene, polypropylene, or the like.

Fourth embodiment

The elevator rope 400 according to the fourth embodiment will be described below. Fig. 11 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the elevator rope 400. The elevator rope 400 is different from the third embodiment in that the steel core 41 is composed of a single steel wire. In contrast, in the third embodiment, the steel core 31 is constituted by a steel strand formed by twisting a plurality of steel wires. Otherwise, the present embodiment is the same as the third embodiment, and therefore, a description thereof is omitted here.

Modification of the fourth embodiment

An elevator rope 401 as a modification of the fourth embodiment will be described below. Fig. 12 is a cross-sectional view showing a cross section of the elevator rope 401 perpendicular to the longitudinal direction. As shown in fig. 12, an elevator rope 401 is different from the fourth embodiment in that it includes a resin coating layer 48 as an outermost layer. That is, in the elevator rope 400 according to the fourth embodiment, the second wire layer 35 is exposed to the outside as the outermost layer of the elevator rope 400. In contrast, in the elevator rope 401 of this modification, the outer periphery of the second wire layer 35 is coated with the coating layer 48. This improves the abrasion resistance and durability of the elevator rope 401.

The cladding 48 enters between the second strands 35n adjacent to each other. As a material of the coating layer 48, a resin having a sufficient coefficient of friction, for example, an elastomer-based resin, polyurethane, or the like is used in order to secure traction with the sheave.

Fifth embodiment

The elevator rope 500 according to the fifth embodiment will be described below. Fig. 13 is a cross-sectional view showing a cross section of the elevator rope 500 perpendicular to the longitudinal direction.

As shown in fig. 13, the elevator rope 500 includes: a steel core 51; a first fiber layer 52 composed of high-strength synthetic fibers arranged on the outer periphery of the steel core 51; and a first wire layer 53 formed by winding a plurality of first steel strands 53n around the outer periphery of the first fiber layer 52. Further, the present invention provides: a second fiber layer 54 composed of high-strength synthetic fibers arranged on the outer periphery of the first wire layer 53; and a second wire layer 55 formed by winding a plurality of second steel strands 55n around the outer periphery of the second fiber layer 54. Further, the present invention provides: a third fiber layer 56 composed of high-strength synthetic fibers arranged on the outer periphery of the second wire layer 55; and a third wire layer 57 formed by winding a plurality of third steel strands 57n around the outer periphery of the third fiber layer 56.

The steel core 51 is constituted by a steel strand formed by twisting a plurality of steel wires. The steel core 51 is composed of a core wire and 6 side wires wound around the outer periphery of the core wire. The core wire and the side wire are both composed of steel wires.

The first fiber layer 52 is a layer made of high-strength synthetic fibers arranged on the outer periphery of the steel core 51. The first fiber layer 52 is formed by twisting a plurality of fiber bundles, each of which is made of high-strength synthetic fibers. As the high-strength synthetic fiber, for example, carbon fiber, glass fiber, poly-p-Phenylene Benzobisoxazole (PBO) fiber, aromatic polyamide fiber, polyarylate fiber, basalt fiber, or the like is used. The respective fiber bundles may be, for example, fiber bundles which are cured and integrated with a resin such as an epoxy resin or a urethane resin, or fiber bundles which are coated with a resin.

The first wire layer 53 is formed by winding a plurality of first strands 53n formed by twisting a plurality of wires around the outer periphery of the first fiber layer 52. In the example shown in fig. 13, 12 first steel strands 53n are wound around the outer periphery of the first fiber layer 52. Each first steel strand 53n is composed of a core wire and 6 side wires wound around the outer periphery of the core wire. The core wire and the side wire are both composed of steel wires.

The second fiber layer 54 is a layer made of high-strength synthetic fibers arranged on the outer periphery of the first wire layer 53. The second fiber layer 54 is formed by twisting a plurality of fiber bundles, each of which is made of high-strength synthetic fibers. As the high-strength synthetic fiber, for example, carbon fiber, glass fiber, poly-p-Phenylene Benzobisoxazole (PBO) fiber, aromatic polyamide fiber, polyarylate fiber, basalt fiber, or the like is used. The respective fiber bundles may be, for example, fiber bundles which are cured and integrated with a resin such as an epoxy resin or a urethane resin, or fiber bundles which are coated with a resin.

The second wire layer 55 is formed by winding a plurality of second strands 55n formed by twisting a plurality of wires around the outer periphery of the second fiber layer 54. In the example shown in fig. 13, 20 second steel strands 55n are wound around the outer periphery of the second fiber layer 54. Each second stranded wire 55n has a core wire, 9 first side wires wound around the outer periphery of the core wire, and 9 second side wires wound around the outer periphery of the first side wires. The core wire, the first side wire and the second side wire are all composed of steel wires.

The third fiber layer 56 is a layer made of high-strength synthetic fibers arranged on the outer periphery of the second wire layer 55. The third fiber layer 56 is formed by twisting a plurality of fiber bundles, each of which is made of high-strength synthetic fibers. As the high-strength synthetic fiber, for example, carbon fiber, glass fiber, poly-p-Phenylene Benzobisoxazole (PBO) fiber, aromatic polyamide fiber, polyarylate fiber, basalt fiber, or the like is used. The respective fiber bundles may be, for example, fiber bundles which are cured and integrated with a resin such as an epoxy resin or a urethane resin, or fiber bundles which are coated with a resin.

The third wire layer 57 is formed by winding a plurality of third strands 57n formed by twisting a plurality of wires around the outer periphery of the third fiber layer 56. In the example shown in fig. 13, 15 third twisted wires 57n are wound around the outer periphery of the third fiber layer 56. Each third stranded wire 57n has a core wire, 9 first side wires wound around the outer periphery of the core wire, and 9 second side wires wound around the outer periphery of the first side wires. The core wire, the first side wire and the second side wire are all composed of steel wires. In the fifth embodiment, the third wire layer 57 is located at the outermost layer of the elevator rope 500 and is exposed to the outside.

In manufacturing the elevator rope 500, first, a plurality of fiber bundles made of high-strength synthetic fibers are arranged on the outer periphery of a steel core 51 made of steel strands formed by twisting a plurality of steel wires, and a first fiber layer 52 is formed. Specifically, a plurality of fiber bundles are twisted so as to follow the outer peripheral surface of the steel core 51, thereby forming the first fiber layer 52. At this time, in order to sufficiently bear the tensile load applied to the elevator rope by the first fiber layer 52, the plurality of fiber bundles are slightly loosely twisted, but since the steel core 51 is used as the core material, the shape at the time of twisting is not likely to be deformed, and the first fiber layer 52 is likely to be formed. Thereafter, a plurality of first strands 53n formed by twisting a plurality of steel wires are wound around the outer periphery of the first fiber layer 52, thereby forming a first steel wire layer 53.

Thereafter, a plurality of fiber bundles made of high-strength synthetic fibers are arranged on the outer periphery of the first wire layer 53 to form a second fiber layer 54. Specifically, the plurality of fiber bundles are twisted so as to follow the outer peripheral surface of the first wire layer 53, thereby forming the second fiber layer 54. Further, a plurality of second twisted wires 55n formed by twisting a plurality of steel wires are wound around the outer periphery of the second fiber layer 54, thereby forming a second steel wire layer 55.

Thereafter, a plurality of fiber bundles made of high-strength synthetic fibers are arranged on the outer periphery of the second wire layer 55 to form a third fiber layer 56. Specifically, the plurality of fiber bundles are twisted so as to follow the outer peripheral surface of the second wire layer 55, thereby forming the third fiber layer 56. Further, a plurality of third twisted wires 57n formed by twisting a plurality of steel wires are wound around the outer periphery of the third fiber layer 56, and the third wire layer 57 is formed.

As described above, the elevator rope 500 includes: a steel core 51; a first fiber layer 52 composed of high-strength synthetic fibers arranged on the outer periphery of the steel core 51; and a first wire layer 53 formed by winding a plurality of steel strands around the outer periphery of the first fiber layer 52. This makes it possible to easily form the first fiber layer 52 using the steel core 51 as a core material, and to easily manufacture an elevator rope including high-strength synthetic fibers. The elevator rope 500 further includes: a second fiber layer 54 composed of high-strength synthetic fibers arranged on the outer periphery of the first wire layer 53; and a second wire layer 55 formed by winding a plurality of steel strands around the outer periphery of the second fiber layer 54. The present invention further includes: a third fiber layer 56 composed of high-strength synthetic fibers arranged on the outer periphery of the second wire layer 55; and a third wire layer 57 formed by winding a plurality of steel strands around the outer periphery of the third fiber layer 56. I.e. 3 fibre layers are provided. This can increase the amount of high-strength synthetic fibers used and reduce the weight.

Further, although it is preferable to provide the weight compensating rope (or chain) in the elevator as the lifting height of the elevator increases, according to the elevator rope 500, the weight can be reduced as compared with the conventional elevator rope by using a plurality of fiber layers to contain a large amount of high-strength synthetic fibers, and the number and the mass of the weight compensating rope (or chain) can be further reduced or completely removed.

In the fifth embodiment, the case where the first fiber layer 52 and the second fiber layer 54 are formed by a plurality of fiber bundles on the outer side Zhou Niange of the steel core 51 has been described, but the first fiber layer 52 and the second fiber layer 54 may be formed by knitting a plurality of fiber bundles, or may be formed by bundling a plurality of fiber bundles in a substantially parallel arrangement.

In the fifth embodiment, the structure (number, arrangement, etc. of steel wires) of the steel strands constituting the steel core 51 may be appropriately changed. The number of the first steel strands 53n constituting the first wire layer 53 and the structure (number, arrangement, etc. of the wires) of each first steel strand 53n may be appropriately changed. The number of the second strands 55n constituting the second wire layer 55 and the structure (number, arrangement, etc. of the wires) of each second strand 55n may be appropriately changed. The number of the third strands 57n constituting the third wire layer 57 and the structure (number, arrangement, etc. of the wires) of each third strand 57n may be appropriately changed.

In the fifth embodiment, a buffer layer made of resin may be provided between the first fiber layer 52 and the first wire layer 53. This can suppress abrasion of the first fiber layer 52 caused by direct contact between the first fiber layer 52 and the first wire layer 53. For the same reason, a buffer layer made of resin may be provided between the first wire layer 53 and the second fiber layer 54 and between the second fiber layer 54 and the second wire layer 55. Further, a buffer layer made of resin may be provided between the second wire layer 55 and the third fiber layer 56 and between the third fiber layer 56 and the third wire layer 57. As a material of the buffer layer, a resin having abrasion resistance and low friction, such as polyethylene, polypropylene, or the like, can be used.

In the fifth embodiment, a buffer layer made of resin may be provided between the steel core 51 and the first fiber layer 52, between the first fiber layer 52 and the first wire layer 53, between the first wire layer 53 and the second fiber layer 54, between the second fiber layer 54 and the second wire layer 55, between the second wire layer 55 and the third fiber layer 56, and between the third fiber layer 56 and the third wire layer 57 at least 1. This can suppress abrasion of the first fiber layer 52, the second fiber layer 54, or the third fiber layer 56 at the portion where the buffer layer is provided. In this case, as a material of the buffer layer, a resin having abrasion resistance and low friction, such as polyethylene, polypropylene, or the like, can be used.

Modification of the fifth embodiment

An elevator rope 501 as a modification of the fifth embodiment will be described below. Fig. 14 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the elevator rope 501. As shown in fig. 14, an elevator rope 501 is different from the fifth embodiment in that it includes a resin coating layer 58 as an outermost layer. That is, in the elevator rope 500 according to the fifth embodiment, the third wire layer 57 is exposed to the outside as the outermost layer of the elevator rope 500. In contrast, in the elevator rope 501 of this modification, the outer periphery of the third wire layer 57 is covered with the covering layer 58. This improves the abrasion resistance and durability of the elevator rope 501.

The cladding 58 enters between the third strands 57n adjacent to each other. As a material of the coating layer 58, a resin having a sufficient coefficient of friction, for example, an elastomer-based resin, polyurethane, or the like is used in order to secure traction with the sheave.

Sixth embodiment

The elevator rope 600 according to the sixth embodiment will be described below. Fig. 15 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the elevator rope 600. The elevator rope 600 differs from the fifth embodiment in that the steel core 61 is composed of a single steel wire. In contrast, in the fifth embodiment, the steel core 51 is constituted by a steel strand formed by twisting a plurality of steel wires. Otherwise, the present embodiment is the same as the fifth embodiment, and therefore, a description thereof is omitted here.

Modification of the sixth embodiment

An elevator rope 601 as a modification of the sixth embodiment will be described below. Fig. 16 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the elevator rope 601. As shown in fig. 16, an elevator rope 601 differs from the sixth embodiment in that it includes a resin coating layer 68 as an outermost layer. That is, in the elevator rope 600 according to the sixth embodiment, the third wire layer 57 is exposed to the outside as the outermost layer of the elevator rope 600. In contrast, in the elevator rope 601 of this modification, the outer periphery of the third wire layer 57 is coated with the coating layer 68. This improves the wear resistance and durability of the elevator rope 601.

The cladding 68 enters between the third strands 57n adjacent to each other. As a material of the coating layer 68, a resin having a sufficient coefficient of friction, for example, an elastomer-based resin, polyurethane, or the like is used in order to secure traction with the sheave.

In the above embodiment, the case where the fiber layers are 1 layer, 2 layers, or 3 layers has been described, but the number of fiber layers can be increased appropriately according to the degree of enlargement of the elevator rope. In this case, it is preferable to provide a steel wire layer on the outer periphery of each fiber layer.

Description of the reference numerals

11. 21, 31, 41, 51, 61: a steel core;

11a, 13a: a core wire;

11b: a lateral line;

13b: a first side line;

13c: a second side line;

12. 32, 52: a first fibrous layer;

13. 33, 53: a first steel wire layer;

13n, 33n, 53n: a first steel strand;

18. 28, 38, 48, 58, 68: a coating layer;

19a: a first buffer layer;

19b: a second buffer layer;

34. 54: a second fibrous layer;

35. 55: a second wire layer;

35n, 55n: a second steel strand;

39: a coating;

56: a third fibrous layer;

57: a third wire layer;

57n: a third steel strand;

100. 101, 200, 201, 300, 301, 400, 401, 500, 501, 600, 601: a rope for an elevator.

Claims

1. An elevator rope comprising:

a steel core composed of a steel strand or a single steel wire formed by twisting a plurality of steel wires;

a first fiber layer composed of high-strength synthetic fibers arranged on the outer periphery of the steel core; and

and a first wire layer formed by winding a plurality of twisted steel wires or a single wire around the outer periphery of the first fiber layer.

2. The rope for an elevator according to claim 1, wherein,

at least one of the first fiber layer and the second fiber layer is provided with a buffer layer made of resin.

3. The rope for an elevator according to claim 1 or 2, wherein,

the elevator rope further comprises:

a second fiber layer composed of high-strength synthetic fibers arranged on the outer periphery of the first wire layer; and

and a second wire layer formed by winding a plurality of twisted steel wires or a single wire around the outer periphery of the second fiber layer.

4. The rope for an elevator according to claim 3, wherein,

at least one of the first wire layer and the second fiber layer and the second wire layer is provided with a buffer layer made of resin.

5. The rope for an elevator according to claim 3 or 4, wherein,

the elevator rope further comprises:

a third fiber layer composed of high-strength synthetic fibers arranged on the outer periphery of the second steel wire layer; and

and a third wire layer formed by winding a plurality of twisted steel wires or a single wire around the outer periphery of the third fiber layer.

6. The rope for an elevator according to claim 5, wherein,

at least one of the second wire layer and the third fiber layer and the third wire layer is provided with a buffer layer made of resin.

7. The rope for an elevator according to any one of claims 1 to 6, wherein,

the elevator rope includes a resin coating layer as an outermost layer.

8. A method for manufacturing an elevator rope, comprising the following steps:

forming a first fiber layer by disposing a plurality of fiber bundles made of high-strength synthetic fibers on the outer periphery of a steel core made of a steel strand formed by twisting a plurality of steel wires or a single steel wire; and

and winding a plurality of steel strands or single steel wires formed by twisting a plurality of steel wires on the periphery of the first fiber layer to form a first steel wire layer.

9. The method for manufacturing an elevator rope according to claim 8, wherein,

the method for manufacturing the elevator rope further comprises the following steps:

disposing a plurality of fiber bundles composed of high-strength synthetic fibers on the outer periphery of the first steel wire layer to form a second fiber layer; and

and winding a plurality of steel strands or single steel wires formed by twisting a plurality of steel wires on the periphery of the second fiber layer to form a second steel wire layer.

10. The method for manufacturing an elevator rope according to claim 9, wherein,

disposing a plurality of fiber bundles composed of high-strength synthetic fibers on the outer periphery of the second wire layer to form a third fiber layer; and

and winding a plurality of steel strands or single steel wires formed by twisting a plurality of steel wires on the periphery of the third fiber layer to form a third steel wire layer.

11. The method for manufacturing an elevator rope according to any one of claims 8 to 10, wherein,

the method for manufacturing the elevator rope further comprises the following steps: the coating layer is formed by coating a resin coating body as an outermost layer.