KR20230044028A - Elevator rope and its manufacturing method - Google Patents

Abstract

As an elevator rope for suspending an elevator car in an elevator, a steel core made of a steel strand or a single steel wire twisted with a plurality of steel wires, a first fiber layer made of high-strength synthetic fibers disposed on the outer circumference of the steel core, and a plurality of steel wires An elevator rope comprising a first steel wire layer formed by winding a plurality of twisted steel strands or a single steel wire around the outer periphery of the first fiber layer. According to this elevator rope, an elevator rope containing high-strength synthetic fibers and having a low ellipticity can be easily manufactured.

Description

Elevator rope and its manufacturing method

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

BACKGROUND OF THE INVENTION [0002] With the increase in the height of buildings, the increase in lift of elevators is progressing. In a high-lift elevator, since the diameter and length of the elevator rope used increase, a lightweight and high-strength rope is required. Therefore, a method of using light and strong high-strength synthetic fibers for the core of an elevator rope is known.

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

International Publication No. 2017/064808

By the way, in the manufacture of fiber cores made of high-strength synthetic fibers, for example, a plurality of high-strength fiber yarns formed by bundling a plurality of high-strength synthetic fibers having a diameter of several to several tens of μm are arranged in a row, bundled, or twisted together to form a fiber core. , so that the overall cross-sectional shape is circular. At this time, in order for the fiber core to sufficiently bear the tensile load applied to the elevator rope during elevator operation, the high-strength fiber yarns are deliberately twisted slightly loosely with each other. However, since high-strength fiber yarns are thin and soft, they tend to lose their shape when loosely twisted, and it is not easy to make a circular core material, which sometimes results in an ellipse. If the ellipticity of the core material is high, the ellipticity of the rope with the steel strand wound around its outer periphery also increases, and if the ellipticity is high, the life of the rope may be reduced.

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

An elevator rope according to the present disclosure includes a steel core made of a steel strand or a single steel wire twisted with a plurality of steel wires, a first fiber layer made of high-strength synthetic fibers disposed on the outer circumference of the steel core, and a steel strand made of a plurality of steel wires twisted with each other Alternatively, a first steel wire layer formed by winding a plurality of single steel wires around the outer periphery of the first fiber layer is provided.

A method for manufacturing an elevator rope according to the present disclosure is a step of forming a first fiber layer by arranging a plurality of fiber bundles made of high-strength synthetic fibers on the outer circumference of a steel core made of a steel strand or a single steel wire twisted with each other and a step of forming a first steel wire layer by winding a plurality of steel strands or a single steel wire made by twisting a plurality of steel wires together around the outer periphery of the first fiber layer.

According to the elevator rope and its manufacturing method according to the present disclosure, an elevator rope containing high-strength synthetic fibers and having a low ellipticity can be easily manufactured.

1 is a cross-sectional view perpendicular to the longitudinal direction of an elevator rope according to a first embodiment.
2 is a side view showing a state in which each layer of the elevator rope according to the first embodiment is sequentially cut.
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 each layer of an elevator rope according to a first modification of the first embodiment is sequentially cut.
Fig. 5 is a side view showing a state in which each layer of an elevator rope according to a second modification of the first embodiment is sequentially cut.
6 is a cross-sectional view perpendicular to the longitudinal direction of an elevator rope according to a 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.
8 is a cross-sectional view perpendicular to the longitudinal direction of an elevator rope according to a 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.
11 is a cross-sectional view perpendicular to the longitudinal direction of an elevator rope according to a 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.
13 is a cross-sectional view perpendicular to the longitudinal direction of an elevator rope according to a 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.
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.

[First Embodiment]

Hereinafter, the elevator rope 100 according to the first embodiment will be described. 1 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of an elevator rope 100. 2 is a side view showing a state in which each layer of the elevator rope 100 is sequentially cut.

As shown in FIGS. 1 and 2 , the elevator rope 100 has 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 . It also has a first steel wire layer 13 formed by winding a plurality of first steel strands 13n around the outer periphery of the first fiber layer 12.

The steel core 11 consists of a steel strand in which a plurality of steel wires are twisted together. The steel core 11 is composed of a core wire 11a and six side wires 11b wound around the outer circumference of the core wire 11a. Both the core wire 11a and the side wire 11b are made of steel wires.

The first fiber layer 12 is a layer made of high-strength synthetic fibers disposed on the outer circumference of the steel core 11. The first fiber layer 12 is formed by twisting a plurality of fiber bundles with each other, and each fiber bundle is made of high-strength synthetic fibers. As high-strength synthetic fibers, for example, carbon fibers, glass fibers, polyparaphenylene benzoxazole (PBO) fibers, aramid fibers, polyarylate fibers, or basalt fibers are used. Each fiber bundle may be made integral by being hardened with a resin such as, for example, an epoxy resin or a urethane resin, or may be coated with a resin.

The first steel wire layer 13 is formed by winding a plurality of first steel strands 13n in which a plurality of steel wires are twisted together around the outer circumference of the first fiber layer 12 . In the example shown in Fig. 1, eight first steel strands 13n are wound around the outer periphery of the first fiber layer 12. Each first steel strand 13n comprises a core wire 13a, nine first side wires 13b wound around the outer circumference of the core wire 13a, and nine second side wires 13c further wound around the outer circumference of the core wire 13a. have The core wire 13a, the first lateral wire 13b, and the second lateral wire 13c are all made of steel wire. In 1st Embodiment, this 1st steel wire layer 13 is located in the outermost layer of the elevator rope 100, and is exposed to the outside.

When manufacturing the elevator rope 100, first, a plurality of fiber bundles made of high-strength synthetic fibers are placed on the outer circumference of the steel core 11 made of steel strands twisted with a plurality of steel wires to form a first fiber layer 12 do. Specifically, a plurality of fiber bundles are twisted together along the outer circumferential surface of the steel core 11 to form 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 deliberately twisted slightly loosely, but since the steel core 11 is used as the core material, they do not form each other. The shape of the soil does not collapse easily, and the formation of the first fiber layer 12 is easy. After that, a plurality of first steel wire strands 13n in which a plurality of steel wires are twisted are wound around the outer periphery of the first fiber layer 12 to form the first steel wire layer 13 .

As described above, the elevator rope 100 includes a steel core 11, a first fiber layer 12 made of high-strength synthetic fibers disposed on the outer circumference of the steel core 11, and a first fiber layer 12 comprising steel strands It is equipped with the 1st steel wire layer 13 formed by winding multiple pieces around the outer periphery of. In this way, the first fiber layer 12 can be easily formed using the steel core 11 as a core material, and an elevator rope containing high-strength synthetic fibers and having a low ellipticity can be easily manufactured.

In the elevator, it is preferable to provide a rope (or chain) for weight compensation in the elevator as the lifting height increases, but according to the elevator rope 100, weight reduction can be realized by including high-strength synthetic fibers. Therefore, the number or mass of ropes (or chains) for weight compensation can be further reduced or completely eliminated.

Further, in the first embodiment, the case where the first fiber layer 12 is a plurality of fiber bundles twisted around the outer circumference of the steel core 11 has been described, but instead of this, a plurality of fiber bundles are twisted It may be one, or it may be one in which a plurality of fiber bundles are laid out in parallel and bundled together.

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

[First Modification of First Embodiment]

Hereinafter, the rope 101 for an elevator which is a 1st modified example of 1st Embodiment is demonstrated. 3 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the elevator rope 101. 4 is a side view showing a state in which each layer of the elevator rope 101 is sequentially cut.

As shown in Fig. 3 and Fig. 4, the elevator rope 101 is different from the first embodiment in that it is provided with a resin coating layer 18 as the outermost layer. That is, in the elevator rope 100 according to the first embodiment, the first steel wire layer 13 is exposed to the outside as the outermost layer of the elevator rope 100. On the other hand, in the elevator rope 101 according to this modified example, the outer periphery of the first steel wire layer 13 is covered with the coating layer 18. Thereby, the abrasion resistance of the elevator rope 101 is improved, and durability is improved. The covering layer 18 is sandwiched between adjacent first steel strands 13n. As the 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 ensure traction capability between the sheave and the sheave.

In the elevator, it is preferable to provide a rope (or chain) for weight compensation in the elevator as the lifting height increases, but according to the elevator rope 101, weight reduction can be realized by including high-strength synthetic fibers. In addition, by improving the coefficient of friction between the sheave and the sheave, slippage between the sheave and the sheave can be suppressed, and stable power transmission can be performed. As a result, the number or mass of ropes (or chains) for weight compensation can be further reduced or completely eliminated.

[Second modification of the first embodiment]

Hereinafter, the elevator rope 102 as the second modified example of the first embodiment will be described. 5 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the elevator rope 102. The elevator rope 102 is provided with a buffer layer made of resin between the steel core 11 and the first fiber layer 12 and between the first fiber layer 12 and the first steel wire layer 13, respectively. It is different from 1st Embodiment in this. In the following description, the difference is demonstrated, and description of the structure similar to 1st Embodiment is abbreviate|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. Accordingly, wear of the first fiber layer 12 due to direct contact between the steel core 11 and the first fiber layer 12 can be suppressed. In addition, a second buffer layer 19b made of resin is provided between the first fiber layer 12 and the first steel wire layer 13. Thereby, the abrasion of the 1st fiber layer 12 by direct contact between the 1st fiber layer 12 and the 1st steel wire layer 13 can be suppressed. As a material for the first buffer layer 19a and the second buffer layer 19b, a resin having wear resistance and low friction properties, such as polyethylene and polypropylene, is used.

Further, in the second modified example of the first embodiment, both between the steel core 11 and the first fiber layer 12 and between the first fiber layer 12 and the first steel wire layer 13 are made of resin, respectively. The case where the buffer layer is provided is described. However, instead of this, you may make it provide a buffer layer only in any one place among them. In this way, wear of the first fiber layer 12 can be suppressed at the location provided with the buffer layer. That is, a buffer layer may be provided in at least one of between the steel core 11 and the first fiber layer 12 and between the first fiber layer 12 and the first steel wire layer 13.

[Second Embodiment]

Hereinafter, the elevator rope 200 according to the second embodiment will be described. 6 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the elevator rope 200. The elevator rope 200 differs from that of the first embodiment in that the steel core 21 consists of a single steel wire. On the other hand, in 1st Embodiment, the steel core 11 consists of the steel strand which twisted several steel wire mutually. Since other points are in common with the first embodiment, explanations are omitted here.

Further, in this second embodiment, a buffer layer is provided at least one of between the steel core 21 and the first fiber layer 12 and between the first fiber layer 12 and the first steel wire layer 13. You can do it.

[Modified Example of the Second Embodiment]

Hereinafter, an elevator rope 201 as a modified example of the second embodiment will be described. 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, the elevator rope 201 differs from 2nd Embodiment in that it is provided with the coating layer 28 made from resin as an outermost layer. That is, in the elevator rope 200 according to the second embodiment, the first steel wire layer 13 is exposed to the outside as the outermost layer of the elevator rope 200. On the other hand, in the elevator rope 201 according to this modified example, the outer periphery of the first steel wire layer 13 is covered with the coating layer 28. Thereby, the abrasion resistance of the elevator rope 201 is improved, and durability is improved.

The covering layer 28 is sandwiched between adjacent first steel strands 13n. As the material of the coating layer 28, a resin having a sufficient coefficient of friction, for example, an elastomer-based resin or polyurethane, is used in order to ensure traction capability between the sheave and the sheave.

[Third Embodiment]

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

As shown in FIG. 8 , the elevator rope 300 has a steel core 31 and a first fiber layer 32 made of high-strength synthetic fibers disposed on the outer periphery of the steel core 31 . It also has a first steel wire layer 33 formed by winding a plurality of first steel strands 33n around the outer periphery of the first fiber layer 32. In addition, it has a second fiber layer 34 made of high-strength synthetic fibers arranged on the outer periphery of the first steel wire layer 33. It also has a second steel wire layer 35 formed by winding a plurality of second steel strands 35n around the outer periphery of the second fiber layer 34.

The steel core 31 consists of a steel strand in which a plurality of steel wires are twisted together. The steel core 31 consists of a core wire and six side wires wound around the outer periphery of the core wire. Both the core wire and the side wire are made of steel wire.

The first fiber layer 32 is a layer made of high-strength synthetic fibers disposed on the outer circumference of the steel core 31. The first fiber layer 32 is formed by twisting a plurality of fiber bundles with each other, and each fiber bundle is made of high-strength synthetic fibers. As high-strength synthetic fibers, for example, carbon fibers, glass fibers, polyparaphenylene benzoxazole (PBO) fibers, aramid fibers, polyarylate fibers, or basalt fibers are used. Each fiber bundle may be made integral by being hardened with a resin such as, for example, an epoxy resin or a urethane resin, or may be coated with a resin.

The first steel wire layer 33 is formed by winding a plurality of first steel strands 33n in which a plurality of steel wires are twisted together around the outer circumference 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 consists of a core wire and six side wires wound around the outer periphery of the core wire. Both the core wire and the side wire are made of steel wire.

The second fiber layer 34 is a layer made of high-strength synthetic fibers disposed on the outer periphery of the first steel wire layer 33. The second fiber layer 34 is formed by twisting a plurality of fiber bundles with each other, and each fiber bundle is made of high-strength synthetic fibers. As high-strength synthetic fibers, for example, carbon fibers, glass fibers, polyparaphenylene benzoxazole (PBO) fibers, aramid fibers, polyarylate fibers, or basalt fibers are used. Each fiber bundle may be made integral by being hardened with a resin such as, for example, an epoxy resin or a urethane resin, or may be coated with a resin.

The second steel wire layer 35 is formed by winding a plurality of second steel strands 35n of twisted plurality of steel wires around the outer circumference 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, nine first side wires wound around the outer periphery of the core wire, and nine second side wires wound around the outer circumference of the core wire. All of these core wires, first lateral wires, and second lateral wires are made of steel wires. In 3rd Embodiment, this 2nd steel wire layer 35 is located in the outermost layer of the elevator rope 300, and is exposed to the outside.

When manufacturing the elevator rope 300, first, a plurality of fiber bundles made of high-strength synthetic fibers are arranged on the outer circumference of a steel core 31 made of steel strands twisted with a plurality of steel wires to form a first fiber layer 32 do. Specifically, a plurality of fiber bundles are twisted together along the outer circumferential surface of the steel core 31 to form 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 deliberately twisted slightly loosely, but since the steel core 31 is used as the core material, they do not form each other. The shape of the soil does not collapse easily, and the formation of the first fiber layer 32 is easy. After that, a plurality of first steel wire strands 33n in which a plurality of steel wires are twisted are wound around the outer circumference of the first fiber layer 32 to form the first steel wire layer 33 .

After that, a plurality of fiber bundles made of high-strength synthetic fibers are disposed on the outer periphery of the first steel wire layer 33 to form the second fiber layer 34. Specifically, a plurality of fiber bundles are twisted together along the outer circumferential surface of the first steel wire layer 33 to form the second fiber layer 34 . After that, a plurality of second steel wire strands 35n made by twisting a plurality of steel wires are wound around the outer periphery of the second fiber layer 34 to form the second steel wire layer 35 .

As described above, the elevator rope 300 includes a steel core 31, a first fiber layer 32 made of high-strength synthetic fibers disposed on the outer circumference of the steel core 31, and a first fiber layer 32 comprising steel strands It is equipped with the 1st steel wire layer 33 formed by winding multiple pieces around the outer periphery of. In this way, the first fiber layer 32 can be easily formed using the steel core 31 as a core material, and an elevator rope containing high-strength synthetic fibers and having a low ellipticity can be easily manufactured. In addition, the elevator rope 300 is formed by winding a second fiber layer 34 made of high-strength synthetic fibers disposed on the outer circumference of the first steel wire layer 33 and a plurality of steel strands around the outer circumference of the second fiber layer 34. It is further equipped with the 2nd steel wire layer 35 which consists. That is, two layers of fiber layers are provided. Thereby, weight reduction is realizable by increasing the usage-amount of high-strength synthetic fiber.

In addition, as the elevator height increases, it is preferable to provide a rope (or chain) for weight compensation in the elevator, but according to the elevator rope 300, a plurality of fiber layers contain more high-strength synthetic fibers. By doing this, weight reduction can be realized than conventional elevator ropes, and the number or mass of ropes (or chains) for weight compensation can be further reduced or completely eliminated.

Further, in the above third embodiment, the case where the first fiber layer 32 and the second fiber layer 34 are made by twisting a plurality of fiber bundles around the outer circumference of the steel core 31 has been described, but instead of this, A plurality of fiber bundles may be woven together, or a plurality of fiber bundles may be arranged in parallel and bundled together.

In addition, in the said 3rd Embodiment, you may change the structure of the component strand which comprises the steel core 31 (number of steel wires, arrangement|positioning, etc.) suitably. In addition, the number of first steel strands 33n constituting the first steel wire layer 33 and the structure of each first steel strand 33n (the number and arrangement of steel wires, etc.) may be appropriately changed. In addition, the number of second steel strands 35n constituting the second steel wire layer 35 and the structure (the number and arrangement of steel wires) of each second steel strand 35n may be appropriately changed.

Further, in the third embodiment, between the steel core 31 and the first fiber layer 32, between the first fiber layer 32 and the first steel wire layer 33, and between the first steel wire layer 33 and the first steel wire layer 33. A buffer layer made of resin may be provided in at least one location between the two fiber layers 34 and between the second fiber layer 34 and the second steel wire layer 35. In this way, wear of the first fiber layer 32 or the second fiber layer 34 can be suppressed at the location provided with the buffer layer. At this time, as the material of the buffer layer, a resin having abrasion resistance and low friction, for example, polyethylene, polypropylene, etc. can be used.

[First modified example of the third embodiment]

Hereinafter, an elevator rope 301 as a modification of the third embodiment will be described. 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, the elevator rope 301 differs from 3rd Embodiment in that it is provided with the coating layer 38 made from resin as an outermost layer. That is, in the elevator rope 300 according to the third embodiment, the second steel wire layer 35 is exposed to the outside as the outermost layer of the elevator rope 300. In contrast, in the elevator rope 301 according to this modified example, the outer periphery of the second steel wire layer 35 is covered with the coating layer 38. Thereby, the abrasion resistance of the elevator rope 301 is improved, and durability is improved.

The coating layer 38 is sandwiched between adjacent second steel strands 35n. As the material of the coating layer 38, a resin having a sufficient coefficient of friction, for example, an elastomer-based resin or polyurethane, is used in order to ensure traction capability between the sheave and the sheave.

Further, as the lift height increases, it is preferable to provide a rope (or chain) for weight compensation in the elevator, but according to the elevator rope 301, a plurality of fiber layers contain more high-strength synthetic fibers. By doing this, it is possible to realize a reduction in weight compared to conventional elevator ropes, and by improving the coefficient of friction between the sheave and the sheave, slipping between the sheave and the sheave can be suppressed, and stable power transmission can be performed. As a result, the number or mass of ropes (or chains) for weight compensation can be further reduced or completely eliminated.

[Second modification of the third embodiment]

Hereinafter, an elevator rope 302 as a modified example of the third embodiment will be described. 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 has a resin cover 39 covering each of the first steel strands 33n of the first steel wire layer 33, respectively. It is different from the embodiment, and there is no substantial difference in other points. Accordingly, wear of the first fiber layer 32 due to direct contact between the first fiber layer 32 and the first steel wire layer 33 can be suppressed. In addition, abrasion of the second fiber layer 34 due to direct contact between the first steel wire layer 33 and the second fiber layer 34 can be suppressed. As the material of the covering body 49, a resin having wear resistance and low friction properties, such as polyethylene and polypropylene, is used.

[Fourth Embodiment]

Hereinafter, the elevator rope 400 according to the fourth embodiment will be described. 11 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the elevator rope 400. The elevator rope 400 differs from that of the third embodiment in that the steel core 41 consists of a single steel wire. On the other hand, in 3rd Embodiment, the steel core 31 consists of the steel strand which twisted several steel wire mutually. Other points are similar to those of the third embodiment, so explanations are omitted here.

[Modified Example of the 4th Embodiment]

Hereinafter, an elevator rope 401 as a modified example of the fourth embodiment will be described. Fig. 12 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the elevator rope 401. As shown in FIG. 12, the elevator rope 401 is different from 4th Embodiment in the point provided with the coating layer 48 made from resin as an outermost layer. That is, in the elevator rope 400 according to the fourth embodiment, the second steel wire layer 35 is exposed to the outside as the outermost layer of the elevator rope 400. In contrast, in the elevator rope 401 according to this modified example, the outer periphery of the second steel wire layer 35 is covered with the coating layer 48. Thereby, the abrasion resistance of the elevator rope 401 is improved, and durability is improved.

The coating layer 48 is sandwiched between adjacent second steel strands 35n. As the material of the coating layer 48, a resin having a sufficient coefficient of friction, for example, an elastomer-based resin or polyurethane, is used in order to ensure traction capability between the sheave and the sheave.

[Fifth Embodiment]

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

As shown in Fig. 13, an elevator rope 500 includes a steel core 51, a first fiber layer 52 made of high-strength synthetic fibers disposed on the outer circumference of the steel core 51, and an outer circumference of the first fiber layer 52. It has the 1st steel wire layer 53 formed by winding the some 1st steel strand 53n around. In addition, a second fiber layer 54 made of high-strength synthetic fibers disposed on the outer periphery of the first steel wire layer 53, and a plurality of second steel strands 55n wound around the outer circumference of the second fiber layer 54. It has two steel wire layers (55). In addition, a third fiber layer 56 made of high-strength synthetic fibers disposed on the outer periphery of the second steel wire layer 55, and a plurality of third forced strands 57n wound around the outer circumference of the third fiber layer 56. It has the 3rd steel wire layer 57.

The steel core 51 consists of a steel strand in which a plurality of steel wires are twisted together. The steel core 51 consists of a core wire and six side wires wound around the outer periphery of the core wire. Both the core wire and the side wire are made of steel wires.

The first fiber layer 52 is a layer made of high-strength synthetic fibers disposed on the outer circumference of the steel core 51. The first fiber layer 52 is formed by twisting a plurality of fiber bundles with each other, and each fiber bundle is made of high-strength synthetic fibers. As high-strength synthetic fibers, for example, carbon fibers, glass fibers, polyparaphenylene benzoxazole (PBO) fibers, aramid fibers, polyarylate fibers, or basalt fibers are used. Each fiber bundle may be made integral by being hardened with a resin such as, for example, an epoxy resin or a urethane resin, or may be coated with a resin.

The first steel wire layer 53 is formed by winding a plurality of first steel strands 53n in which a plurality of steel wires are twisted together around the outer circumference 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 consists of a core wire and six side wires wound around the outer periphery of the core wire. Both the core wire and the side wire are made of steel wire.

The second fiber layer 54 is a layer made of high-strength synthetic fibers disposed on the outer periphery of the first steel wire layer 53. The second fiber layer 54 is formed by twisting a plurality of fiber bundles with each other, and each fiber bundle is made of high-strength synthetic fibers. As high-strength synthetic fibers, for example, carbon fibers, glass fibers, polyparaphenylene benzoxazole (PBO) fibers, aramid fibers, polyarylate fibers, or basalt fibers are used. Each fiber bundle may be made integral by being hardened with a resin such as, for example, an epoxy resin or a urethane resin, or may be coated with a resin.

The second steel wire layer 55 is formed by winding a plurality of second steel strands 55n made by twisting a plurality of steel wires together around the outer circumference 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 steel strand 55n has a core wire, nine first side wires wound around the outer circumference of the core wire, and nine second side wires wound around the outer circumference of the core wire. All of these core wires, first lateral wires, and second lateral wires are made of steel wires.

The third fiber layer 56 is a layer made of high-strength synthetic fibers disposed on the outer periphery of the second steel wire layer 55. The third fiber layer 56 is formed by twisting a plurality of fiber bundles with each other, and each fiber bundle is made of high-strength synthetic fibers. As high-strength synthetic fibers, for example, carbon fibers, glass fibers, polyparaphenylene benzoxazole (PBO) fibers, aramid fibers, polyarylate fibers, or basalt fibers are used. Each fiber bundle may be made integral by being hardened with a resin such as, for example, an epoxy resin or a urethane resin, or may be coated with a resin.

The third steel wire layer 57 is formed by winding a plurality of third steel strands 57n made by twisting a plurality of steel wires together around the outer circumference of the third fiber layer 56 . In the example shown in Fig. 13, 15 third steel strands 57n are wound around the outer periphery of the third fiber layer 56. Each third steel strand 57n has a core wire, nine first side wires wound around the outer circumference of the core wire, and nine second side wires wound around the outer circumference of the core wire. All of these core wires, first lateral wires, and second lateral wires are made of steel wires. In 5th Embodiment, this 3rd steel wire layer 57 is located in the outermost layer of the elevator rope 500, and is exposed to the outside.

When manufacturing the elevator rope 500, first, a plurality of fiber bundles made of high-strength synthetic fibers are placed on the outer circumference of a steel core 51 made of steel strands twisted with a plurality of steel wires to form a first fiber layer 52 do. Specifically, a plurality of fiber bundles are twisted together along the outer circumferential surface of the steel core 51 to form 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 deliberately twisted slightly loosely, but since the steel core 51 is used as the core material, they do not form each other. The shape of the soil does not collapse easily, and the formation of the first fiber layer 52 is easy. After that, a plurality of first steel wire strands 53n in which a plurality of steel wires are twisted are wound around the outer periphery of the first fiber layer 52 to form the first steel wire layer 53 .

After that, a plurality of fiber bundles made of high-strength synthetic fibers are disposed on the outer periphery of the first steel wire layer 53 to form the second fiber layer 54. Specifically, a plurality of fiber bundles are twisted together along the outer circumferential surface of the first steel wire layer 53 to form the second fiber layer 54 . Further, a plurality of second steel wire strands 55n made by twisting a plurality of steel wires are wound around the outer periphery of the second fiber layer 54 to form the second steel wire layer 55 .

Thereafter, a plurality of fiber bundles made of high-strength synthetic fibers are disposed on the outer periphery of the second steel wire layer 55 to form the third fiber layer 56. Specifically, a plurality of fiber bundles are twisted together along the outer circumferential surface of the second steel wire layer 55 to form the third fiber layer 56 . Further, a plurality of third steel wire strands 57n in which a plurality of steel wires are twisted are wound around the outer periphery of the third fiber layer 56 to form a third steel wire layer 57 .

As described above, the elevator rope 500 includes a steel core 51, a first fiber layer 52 made of high-strength synthetic fibers disposed on the outer circumference of the steel core 51, and a first fiber layer 52 comprising steel strands It is equipped with the 1st steel wire layer 53 formed by winding a plurality of pieces around the outer periphery of. In this way, the first fiber layer 52 can be easily formed using the steel core 51 as a core material, and an elevator rope made of high-strength synthetic fibers can be easily manufactured. In addition, the elevator rope 500 is formed by winding a second fiber layer 54 made of high-strength synthetic fibers disposed on the outer circumference of the first steel wire layer 53 and a plurality of steel strands around the outer circumference of the second fiber layer 54. It is further equipped with the 2nd steel wire layer 55 which consists. In addition, a third fiber layer 56 made of high-strength synthetic fibers disposed on the outer circumference of the second steel wire layer 55, and a third steel wire layer 57 formed by winding a plurality of steel strands around the outer circumference of the third fiber layer 56 ) is further provided. That is, three fiber layers are provided. Thereby, weight reduction is realizable by increasing the usage-amount of high-strength synthetic fiber.

In addition, as the elevator height increases, it is preferable to provide a rope (or chain) for weight compensation in the elevator, but according to the elevator rope 500, a plurality of fiber layers contain more high-strength synthetic fibers. By doing this, weight reduction can be realized than conventional elevator ropes, and the number or mass of ropes (or chains) for weight compensation can be further reduced or completely eliminated.

Further, in the fifth embodiment, the case where the first fiber layer 52 and the second fiber layer 54 are a plurality of fiber bundles twisted around the outer circumference of the steel core 51 has been described, but instead of this, A plurality of fiber bundles may be woven together, or a plurality of fiber bundles may be arranged in parallel and bundled together.

In the above fifth embodiment, the structure of the constituent strands constituting the steel core 51 (the number and arrangement of steel wires, etc.) may be appropriately changed. In addition, the number of first steel strands 53n constituting the first steel wire layer 53 and the structure of each first steel strand 53n (the number and arrangement of steel wires, etc.) may be appropriately changed. In addition, the number of second steel strands 55n constituting the second steel wire layer 55 and the structure of each second steel strand 55n (the number and arrangement of steel wires) may be appropriately changed. In addition, the number of third steel strands 57n constituting the third steel wire layer 57 and the structure of each third steel strand 57n (the number and arrangement of steel wires, etc.) 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 steel wire layer 53. Accordingly, wear of the first fiber layer 52 due to direct contact between the first fiber layer 52 and the first steel wire layer 53 can be suppressed. For the same reason, a buffer layer made of resin may also be provided between the first steel wire layer 53 and the second fiber layer 54 and between the second fiber layer 54 and the second steel wire layer 55. do. A buffer layer made of resin may also be provided between the second steel wire layer 55 and the third fiber layer 56 and between the third fiber layer 56 and the third steel wire layer 57. In addition, as a material for the buffer layer, a resin having wear resistance and low friction properties, such as polyethylene and polypropylene, can be used.

In the fifth embodiment, between the steel core 51 and the first fiber layer 52, between the first fiber layer 52 and the first steel wire layer 53, and between the first steel wire layer 53 and the first steel wire layer 53. Between the two fiber layers 54, between the second fiber layer 54 and the second steel wire layer 55, between the second steel wire layer 55 and the third fiber layer 56, and between the third fiber layer 56 and You may make it provide the buffer layer which consists of resin in at least one place among the 3rd steel wire layer 57. In this way, wear of the first fiber layer 52, the second fiber layer 54, or the third fiber layer 56 can be suppressed at the location provided with the buffer layer. At this time, as the material of the buffer layer, a resin having abrasion resistance and low friction, for example, polyethylene, polypropylene, etc. can be used.

[Modified Example of the Fifth Embodiment]

Hereinafter, an elevator rope 501 as a modified example of the fifth embodiment will be described. 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, the elevator rope 501 differs from 5th Embodiment in that it is provided with the coating layer 58 made from resin as an outermost layer. That is, in the elevator rope 500 according to the fifth embodiment, the third steel wire layer 57 is exposed to the outside as the outermost layer of the elevator rope 500. In contrast, in the elevator rope 501 according to this modified example, the outer periphery of the third steel wire layer 57 is covered with the coating layer 58. As a result, the elevator rope 501 has improved abrasion resistance and improved durability.

The coating layer 58 is sandwiched between adjacent third steel strands 57n. As the material of the coating layer 58, a resin having a sufficient coefficient of friction, for example, an elastomer-based resin or polyurethane, is used in order to ensure traction capability between the sheave and the sheave.

[Sixth Embodiment]

Hereinafter, the elevator rope 600 according to the sixth embodiment will be described. 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 that of the fifth embodiment in that the steel core 61 consists of a single steel wire. In contrast, in the fifth embodiment, the steel core 51 is made of a steel strand in which a plurality of steel wires are twisted. Other points are similar to those of the fifth embodiment, so explanations are omitted here.

[Modified Example of the 6th Embodiment]

Hereinafter, an elevator rope 601 as a modified example of the sixth embodiment will be described. 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, the elevator rope 601 differs from that of the sixth embodiment in that it is provided with a coating layer 68 made of resin as the outermost layer. That is, in the elevator rope 600 according to the sixth embodiment, the third steel wire layer 57 is exposed to the outside as the outermost layer of the elevator rope 600. In contrast, in the elevator rope 601 according to this modified example, the outer periphery of the third steel wire layer 57 is covered with the coating layer 68. Thereby, the abrasion resistance of the elevator rope 601 is improved, and durability is improved.

The coating layer 68 is sandwiched between adjacent third steel strands 57n. As the material of the coating layer 68, a resin having a sufficient coefficient of friction, for example, an elastomer-based resin or polyurethane, is used in order to ensure traction capability between the sheave and the sheave.

In the above embodiment, the case where the fiber layer is one, two or three layers has been described, but the number of fiber layers can be appropriately increased depending on the degree of diameter increase of the elevator rope. At that time, it is preferable to provide a steel wire layer on the outer periphery of each fiber layer.

11, 21, 31, 41, 51, 61: steel core 11a, 13a: core wire
11b: side line 13b: first side line
13c: second side wire 12, 32, 52: first fiber layer
13, 33, 53: first steel wire layer
13n, 33n, 53n: first forced strand
18, 28, 38, 48, 58, 68 Coating layer 19a First buffer layer
19b: second buffer layer 34, 54: second fiber layer
35, 55: second steel wire layer
35n, 55n: 2nd forced strand 39: covering body
56: third fiber layer 57: third steel wire layer
57n: third forced strand
100, 101, 200, 201, 300, 301, 400, 401, 500, 501, 600, 601: Elevator rope

Claims (11)

A steel core made of a steel strand or a single steel wire in which a plurality of steel wires are twisted together;
A first fiber layer made of high-strength synthetic fibers arranged on the outer circumference of the steel core;
An elevator rope comprising a first steel wire layer formed by winding a plurality of steel strands or a single steel wire of a plurality of steel wires twisted together around the outer periphery of the first fiber layer. The method of claim 1,
An elevator rope comprising a buffer layer made of resin at at least one location between the steel core and the first fiber layer and between the first fiber layer and the first steel wire layer. According to claim 1 or claim 2,
A second fiber layer made of high-strength synthetic fibers disposed on the outer circumference of the first steel wire layer;
An elevator rope further comprising a second steel wire layer formed by winding a plurality of steel strands or a single steel wire of a plurality of steel wires twisted together around the outer periphery of the second fiber layer. The method of claim 3,
An elevator rope comprising a buffer layer made of resin at at least one location between the first steel wire layer and the second fiber layer and between the second fiber layer and the second fiber layer. According to claim 3 or claim 4,
A third fiber layer made of high-strength synthetic fibers disposed on the outer periphery of the second steel wire layer;
An elevator rope further comprising a third steel wire layer formed by winding a plurality of steel strands or a single steel wire of a plurality of steel wires twisted together around the outer periphery of the third fiber layer. The method of claim 5,
An elevator rope comprising a buffer layer made of resin at at least one location between the second steel wire layer and the third fiber layer and between the third fiber layer and the third fiber layer. The method according to any one of claims 1 to 6,
An elevator rope provided with a resin coating layer as an outermost layer. Forming a first fiber layer by arranging a plurality of fiber bundles made of high-strength synthetic fibers on the outer circumference of a steel core made of a steel strand or a single steel wire twisted with each other;
A method for manufacturing an elevator rope including a step of forming a first steel wire layer by winding a plurality of steel strands or a single steel wire made by twisting a plurality of steel wires together around the outer periphery of the first fiber layer. The method of claim 8,
forming a second fiber layer by arranging a plurality of fiber bundles made of high-strength synthetic fibers on the outer periphery of the first steel wire layer;
A method for manufacturing an elevator rope, further comprising a step of forming a second steel wire layer by winding a plurality of steel strands or a single steel wire made by twisting a plurality of steel wires together around the outer circumference of the second fiber layer. The method of claim 9,
forming a third fiber layer by arranging a plurality of fiber bundles made of high-strength synthetic fibers on the outer periphery of the second steel wire layer;
A method for manufacturing an elevator rope, further comprising a step of forming a third steel wire layer by winding a plurality of steel strands or a single steel wire made by twisting a plurality of steel wires together around the outer periphery of the third fiber layer. The method according to any one of claims 8 to 10,
The manufacturing method of the elevator rope which further includes the process of forming the coating layer by coating the cover made of resin as an outermost layer.

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