WO2024013793A1 - Rope for elevator and elevator device - Google Patents

Abstract

Provided is a rope for an elevator, wherein a core rope has: an inner layer; a plurality of outer layer strands which are made of fibers and which are disposed on the outer periphery of the inner layer; and a plurality of substrand groups disposed at the circumference of the inner layer. The outer layer strands are each disposed between adjacent inner layer strands, on the outer periphery of the inner layer. The substrand groups each have a plurality of substrands made of fibers, which are arranged along the circumference of the same circle the center of which is the center of the inner layer. The substrand groups are each disposed between adjacent outer layer strands.

Description

Elevator ropes and elevator equipment

The present disclosure relates to an elevator rope and an elevator device.

In conventional wire ropes, multiple steel strands are twisted around the outer circumference of a core rope. The core rope has three core rope strands and three sub-strands. Each core strand is configured by bundling a large number of synthetic fibers (see, for example, Patent Document 1).

Japanese Patent Application Publication No. 2013-170323

In conventional wire ropes such as those described above, there are many gaps between the outer periphery of the core rope and the layer of multiple steel strands. Therefore, the shape of the cross section perpendicular to the longitudinal direction of the wire rope tends to collapse.

The present disclosure has been made in order to solve the above-mentioned problems, and aims to provide an elevator rope and an elevator device that can further stabilize the shape of the cross section perpendicular to the longitudinal direction of the core rope. do.

An elevator rope according to the present disclosure includes a core rope and a plurality of steel strands twisted around the outer periphery of the core rope, and the core rope is configured by bundling a plurality of inner layer strands made of fibers. It has an inner layer made of fibers, an outer layer strand made of a plurality of fibers arranged around the outer periphery of the inner layer, and a plurality of substrand aggregates arranged around the outer periphery of the inner layer. When viewed in a right-angled cross-section, each outer layer strand is located between adjacent inner layer strands at the outer periphery of the inner layer, and each substrand collection is arranged along the same circumference around the center of the inner layer. It has a plurality of fiber substrands arranged side by side, and each substrand assembly is arranged between adjacent outer layer strands.

According to the present disclosure, the shape of the cross section perpendicular to the longitudinal direction of the core rope can be made more stable.

1 is a schematic configuration diagram showing an elevator device according to Embodiment 1. FIG. FIG. 2 is a cross-sectional view of the main rope along line II-II in FIG. 1; FIG. 7 is a cross-sectional view of the main rope according to the second embodiment. FIG. 7 is a cross-sectional view of the main rope according to Embodiment 3. FIG. 4 is a cross-sectional view of the main rope according to Embodiment 4.

Embodiments will be described below with reference to the drawings.
Embodiment 1.
FIG. 1 is a schematic configuration diagram showing an elevator apparatus according to a first embodiment. In the figure, a machine platform 2 is fixed to the top of a hoistway 1. A hoisting machine 3 is installed on the machine stand 2.

The hoist 3 has a drive sheave 4, a hoist motor 5, and a hoist brake (not shown). The hoist motor 5 rotates the drive sheave 4. The hoist brake keeps the drive sheave 4 stationary. Further, the hoisting machine brake brakes the rotation of the drive sheave 4.

A plurality of main ropes 6, each of which is an elevator rope, is wound around the drive sheave 4. In FIG. 1 only one main rope 6 is shown. A plurality of sheave grooves (not shown) are provided on the outer periphery of the drive sheave 4. Each main rope 6 is inserted into a corresponding sheave groove.

At the top of the hoistway 1, a first rope stop 7 and a second rope stop 8 are provided. Each main rope 6 has a first end 6a and a second end 6b. Each first end 6a is connected to a first latch 7. Each second end 6b is connected to a second latch 8.

The car 9 and the counterweight 10 are suspended within the hoistway 1 by a plurality of main ropes 6. Further, the car 9 and the counterweight 10 are moved up and down in the hoistway 1 by rotating the drive sheave 4.

A pair of car guide rails (not shown) and a pair of counterweight guide rails (not shown) are installed in the hoistway 1. A pair of car guide rails guide the elevator car 9 up and down. A pair of counterweight guide rails guide the lifting and lowering of the counterweight 10.

At the bottom of the car 9, a first car hanging wheel 11a and a second car hanging wheel 11b are provided. A counterweight suspension wheel 12 is provided above the counterweight 10.

The plurality of main ropes 6 are wound around the first car hanging wheel 11a, the second car hanging wheel 11b, the drive sheave 4, and the counterweight hanging wheel 12 in order from the first rope stopper 7 side. That is, the roping method of the elevator apparatus according to the first embodiment is a 2:1 roping method.

FIG. 2 is a cross-sectional view of the main rope 6 along line II-II in FIG. 1, showing a cross section perpendicular to the longitudinal direction of the main rope 6.

The main rope 6 has a core rope 21 and a plurality of steel strands 22. A plurality of steel strands 22 are twisted around the outer circumference of the core rope 21. In this example, twelve steel strands 22 are used. The diameter of each steel strand 22 is smaller than the diameter of the core rope 21.

Each steel strand 22 has a plurality of steel wires. The plurality of steel strands include a center strand 23, a plurality of intermediate strands 24, and a plurality of outer layer strands 25.

The central strand 23 is arranged at the center of the cross section perpendicular to the longitudinal direction of the steel strand 22. The plurality of intermediate strands 24 are twisted around the outer periphery of the center strand 23. In this example, nine intermediate strands 24 are used.

The plurality of outer layer strands 25 are twisted around the outer periphery of the intermediate layer made up of the plurality of intermediate strands 24. In this example, nine outer layer strands 25 are used. That is, in each steel strand 22, the number of intermediate strands 24 and the number of outer layer strands 25 are the same.

The diameter of each intermediate strand 24 is smaller than the diameter of the center strand 23. Further, the diameter of each intermediate strand 24 is smaller than the diameter of each outer layer strand 25. The diameter of each outer layer strand 25 is the same as the diameter of the center strand 23.

Note that when the loads of the car 9 and the counterweight 10 actually act on the main rope 6, each steel strand 22 is pressed against the outer periphery of the core rope 21.

The core rope 21 has an inner layer 26, an outer layer strand 27 made of a plurality of fibers, and a plurality of substrand aggregates 28.

The inner layer 26 is arranged at the center of the core rope 21 in a cross section perpendicular to the longitudinal direction of the core rope 21. Moreover, the inner layer 26 is configured by bundling a plurality of inner layer strands 29 made of fibers. The plurality of inner layer strands 29 are twisted together and bundled. In this example, the number of the plurality of inner layer strands 29 is three.

The cross-sectional shape of each inner layer strand 29 in a state where no load is applied to the main rope 6 is circular.

The plurality of outer layer strands 27 are arranged around the outer periphery of the inner layer 26. Further, the plurality of outer layer strands 27 are twisted around the outer periphery of the inner layer 26. In this example, the number of the plurality of outer layer strands 27 is the same as the number of the plurality of inner layer strands 29, that is, three.

The cross-sectional shape of each outer layer strand 27 in a state where no load is applied to the main rope 6 is circular.

When looking at a cross section perpendicular to the longitudinal direction of the core rope 21, each outer layer strand 27 is arranged between adjacent inner layer strands 29 on the outer periphery of the inner layer 26. That is, each outer layer strand 27 partially enters a recess formed between adjacent inner layer strands 29 on the outer periphery of the inner layer 26, and is in contact with the outer periphery of two adjacent inner layer strands 29.

The plurality of substrand aggregates 28 are arranged around the outer periphery of the inner layer 26. Further, the plurality of substrand aggregates 28 are twisted around the outer periphery of the inner layer 26. In this example, the number of the plurality of substrand aggregates 28 is the same as the number of the plurality of inner layer strands 29, that is, three. The plurality of outer layer strands 27 and the plurality of substrand aggregates 28 are alternately arranged around the outer periphery of the inner layer 26.

Each substrand aggregate 28 has a plurality of substrands 30 made of fiber. In this example, the number of substrands 30 in each substrand aggregate 28 is three.

The cross-sectional shape of each sub-strand 30 in a state where no load is applied to the main rope 6 is circular.

When looking at a cross section perpendicular to the longitudinal direction of the core rope 21, the plurality of substrands 30 in each substrand assembly 28 are arranged along the same circumference centered on the center of the inner layer 26.

When looking at a cross section perpendicular to the longitudinal direction of the core rope 21, each substrand assembly 28 is arranged between adjacent outer layer strands 27. That is, each substrand assembly 28 is filled between adjacent outer layer strands 27.

Each inner layer strand 29, each outer layer strand 27, and each sub-strand 30 are each constructed by twisting a plurality of yarns together.

If the twist ratio of each inner layer strand 29 is X1, the twist ratio of each outer layer strand 27 is X2, and the twist ratio of each sub-strand 30 is X3, then X1>X2>X3 holds true. The twist rate is the rate at which the length is reduced by twisting the strands. Specifically, the twisting ratio is the ratio of the length L of the strand before twisting to the length L0 of the strand in the longitudinal direction of the rope after twisting, and is calculated by X = (L-L0)/L. be done. Therefore, the smaller the twist rate is, the smaller the reduction amount is.

The diameters of all inner layer strands 29 are the same. The diameters of all outer layer strands 27 are the same. The diameters of all substrands 30 are the same as each other. When the diameter of each inner layer strand 29 is d1, the diameter of each outer layer strand 27 is d2, and the diameter of each sub-strand 30 is d3, d1≧d2>d3 holds true. Further, the diameter d1 is smaller than the diameter of each steel strand 22.

In such a main rope 6, when looking at a cross section perpendicular to the longitudinal direction of the core rope 21, each outer layer strand 27 is arranged between adjacent inner layer strands 29 on the outer periphery of the inner layer 26. Furthermore, each substrand aggregate 28 is arranged between adjacent outer layer strands 27. Furthermore, each substrand assembly 28 has a plurality of substrands 30 arranged along the same circumference centered on the center of the inner layer 26 .

Therefore, the gap within the core rope 21 and the gap between the outer periphery of the core rope 21 and the layer of the plurality of steel strands 22 can be respectively reduced. Thereby, the shape of the cross section perpendicular to the longitudinal direction of the core rope 21 can be made more stable, and the fatigue performance of the main rope 6 can be improved. Moreover, the manufacturing stability of the main rope 6 can be improved.

Furthermore, the plurality of inner layer strands 29 are twisted together and bundled. Therefore, the gap inside the inner layer 26 is reduced, and deformation of the inner layer 26 during use over time can be suppressed.

Further, the plurality of outer layer strands 27 and the plurality of substrand aggregates 28 are each twisted around the outer periphery of the inner layer 26. Therefore, the gap inside the inner layer 26 is further reduced, and deformation of the inner layer 26 during use over time can be suppressed.

Furthermore, the main rope 6 is bent each time it passes through the drive sheave 4. On the other hand, the plurality of inner layer strands 29 are twisted together, and the plurality of outer layer strands 27 and the plurality of substrand aggregates 28 are each twisted around the outer periphery of the inner layer 26. Therefore, the main rope 6 of the first embodiment is strong against repeated bending and has high fatigue performance.

Further, the twist ratio X3 of each sub-strand 30 is smaller than the twist ratio X2 of each outer layer strand 27, and the twist ratio X2 of each outer layer strand 27 is smaller than the twist ratio X1 of each inner layer strand 29. For this reason, when tension is applied to the main rope 6, radial shrinkage is suppressed from becoming larger at the outer periphery of the core rope 21 than at the center.

Thereby, when tension is applied to the main rope 6, the load burden on each of the plurality of inner layer strands 29, the plurality of outer layer strands 27, and the plurality of sub-strands 30 can be made more equal. Therefore, the elongation of the main rope 6 can be suppressed and the breaking strength of the main rope 6 can be increased.

Further, the diameter d3 of each sub-strand 30 is smaller than the diameter d2 of each outer layer strand 27, and the diameter d2 of each outer layer strand 27 is less than or equal to the diameter d1 of each inner layer strand 29. Therefore, the gap within the core rope 21 can be made smaller. Further, it is possible to suppress elongation of the main rope 6 when tension is applied to the main rope 6, and to increase the breaking strength of the main rope 6.

Here, the core rope of a common elevator rope is composed of three core rope strands. For this reason, a typical core rope manufacturing apparatus is configured to twist three core rope strands together.

On the other hand, in the core rope 21 of the first embodiment, the number of the plurality of inner layer strands 29 is three, and the number of the plurality of outer layer strands 27 is three. Therefore, the inner layer 26 can be easily manufactured using existing manufacturing equipment, and the plurality of outer layer strands 27 can be easily arranged around the outer periphery of the inner layer 26. Thereby, increase in manufacturing costs can be suppressed.

Furthermore, the number of the plurality of substrand aggregates 28 is three. Therefore, the plurality of substrand aggregates 28 can be easily arranged around the outer periphery of the inner layer 26 using existing manufacturing equipment. Thereby, increase in manufacturing costs can be suppressed.

Further, when the diameter d1 of each inner layer strand 29 and the diameter d2 of each outer layer strand 27 are made the same, the plurality of inner layer strands 29 and the plurality of outer layer strands 27 can be manufactured using the same manufacturing equipment and the same manufacturing conditions. I can do it. Thereby, increase in manufacturing costs can be suppressed.

Each inner layer strand 29 and each outer layer strand 27 have the function of containing rope oil, that is, rope grease, and the function of withstanding the load received from the plurality of steel strands 22 when tension is applied to the main rope 6. and a function of maintaining the rigidity of the core rope 21 are required.

On the other hand, the main functions required of each sub-strand 30 are the function of filling gaps in the core rope 21 and the function of improving the fiber density within the core rope 21. Therefore, the degree of freedom in material selection for each sub-strand 30 is higher than the degree of freedom in material selection for each inner layer strand 29 and each outer layer strand 27.

For example, the cost of the main rope 6 can be reduced by forming each sub-strand 30 with a yarn that is cheaper than the yarn forming each inner layer strand 29 and each outer layer strand 27.

Embodiment 2.
Next, FIG. 3 is a cross-sectional view of the main rope 6 according to the second embodiment, showing a cross section perpendicular to the longitudinal direction of the main rope 6. As shown in FIG. The main rope 6 of the second embodiment includes a core rope sheath 31 made of resin in addition to a core rope 21 and a plurality of steel strands 22 . The core cable cover 31 covers the outer periphery of the core cable 21.

The plurality of steel strands 22 are twisted around the outer periphery of the core rope 21 via the core rope sheath 31.

The other configurations in the second embodiment are the same as in the first embodiment.

In such a main rope 6, since the outer periphery of the core rope 21 is covered with the core rope sheath 31, changes in the cross-sectional shape of the core rope 21 can be suppressed, making the performance of the main rope 6 more stable. be able to.

Furthermore, since the core rope 21 does not come into direct contact with the plurality of steel strands 22, wear and damage to the core rope 21 can be suppressed.

Embodiment 3.
Next, FIG. 4 is a cross-sectional view of the main rope 6 according to the third embodiment, showing a cross section perpendicular to the longitudinal direction of the main rope 6. As shown in FIG. The main rope 6 of Embodiment 3 includes, in addition to a core rope 21 and a plurality of steel strands 22, an inner layer covering 32 made of resin, a plurality of outer strand coverings 33 made of resin, and a plurality of resin strands. It has a substrand covering 34 of.

The inner layer 26 is covered with an inner layer covering 32. Each outer layer strand 27 is covered with an outer layer strand cover 33. Each substrand assembly 28 is covered by a substrand covering 34 .

Other configurations in the third embodiment are similar to those in the first embodiment.

In such a main rope 6, each outer layer strand 27 is covered with an outer layer strand cover 33, and each sub-strand aggregate 28 is covered with a sub-strand cover 34.

Therefore, direct contact between the adjacent inner layer strands 29 and outer layer strands 27 is suppressed. Further, direct contact between adjacent inner layer strands 29 and sub-strands 30 is suppressed. Further, direct contact between the adjacent outer layer strands 27 and the sub-strands 30 is suppressed.

Thereby, wear of each inner layer strand 29, each outer layer strand 27, and each sub-strand 30 can be suppressed. Moreover, the gap within the core rope 21 can be further reduced.

Furthermore, the inner layer 26 is covered with an inner layer covering 32. Therefore, direct contact between the adjacent inner layer strands 29 and outer layer strands 27 is more reliably suppressed. Further, direct contact between the adjacent inner layer strands 29 and the sub-strands 30 is more reliably suppressed.

Embodiment 4.
Next, FIG. 5 is a cross-sectional view of the main rope 6 according to the fourth embodiment, showing a cross section perpendicular to the longitudinal direction of the main rope 6. As shown in FIG. In the main rope 6 of the first embodiment, each inner layer strand 29, each outer layer strand 27, and each sub-strand 30 are impregnated with an impregnating resin 35 and hardened.

The other configurations in the fourth embodiment are the same as those in the first embodiment.

In such a main rope 6, each inner layer strand 29, each outer layer strand 27, and each sub-strand 30 are each impregnated with an impregnating resin 35. Therefore, even when the main rope 6 is bent, the relative positions of the fibers can be fixed, and a low space ratio between fibers can be maintained.

In the first to fourth embodiments, commonly used natural fibers or synthetic fibers may be used as the fibers constituting the core rope 21, but in order to increase the breaking strength and mass specific strength of the main rope 6, Additionally, higher strength fibers may be used. Thereby, the load that the core rope 21 can bear can be increased, and the breaking strength of the main rope 6 as a whole can be increased.

In addition, if it is desired to increase the mass-specific strength even if the breaking load is reduced somewhat for the same diameter of the main rope 6, the cross-sectional area of the core rope 21 can be increased while decreasing the cross-sectional area of each steel strand 22. You can.

Furthermore, the cross-sectional configuration of the entire main rope 6 is not limited to the configurations of Embodiments 1 to 4. For example, the number, cross-sectional configuration, etc. of the steel strands 22 may be changed. Further, the number of inner layer strands 29, the number of outer layer strands 27, and the number of substrands 30 may be changed.

Further, the diameter d1 of each inner layer strand 29 may be greater than or equal to the diameter of each steel strand 22.

Additionally, one or more layers of steel strands may be added outside the layer of steel strands 22.

Further, when manufacturing each steel strand 22, the cross-sectional shape of each steel strand 22 may be modified by compressing each steel strand 22 from the outside in the radial direction using a die. This makes it possible to make the cross-sectional shape of each steel strand 22 circular, reduce the contact surface pressure between the main rope 6 and the bottom surface of the sheave groove, and improve the fatigue performance of the main rope 6.

Furthermore, in the first to fourth embodiments, the layout of the entire elevator device is not limited to the layout of FIG. 1. For example, the roping method may be a 1:1 roping method.

Further, the elevator device may be an elevator device having a machine room, a double-deck elevator, a one-shaft multi-car type elevator device, or the like. The one-shaft multi-car system is a system in which an upper car and a lower car placed directly below the upper car move up and down a common hoistway independently.

Furthermore, the elevator rope may be an elevator rope other than the main rope 6, such as a compen rope or a governor rope. Furthermore, in an elevator belt in which a plurality of ropes are embedded in the outer resin layer, at least one rope may be the elevator rope of the present disclosure.

6 Main rope (elevator rope), 21 Core rope, 22 Steel strand, 26 Inner layer, 27 Outer strand, 28 Sub-strand aggregate, 29 Inner strand, 30 Sub-strand, 31 Core rope covering, 33 Outer strand covering , 34 Substrand coating, 35 Impregnated resin.

Claims (10)

comprising a core rope and a plurality of steel strands twisted around the outer circumference of the core rope,
The core rope is
an inner layer composed of a plurality of inner layer strands made of fibers bundled;
a plurality of outer layer strands made of fibers arranged around the outer periphery of the inner layer;
and a plurality of substrand aggregates arranged around the outer periphery of the inner layer,
When looking at a cross section perpendicular to the longitudinal direction of the core rope,
Each of the outer layer strands is arranged between adjacent inner layer strands on the outer periphery of the inner layer,
Each of the substrand aggregates has a plurality of fiber substrands arranged along the same circumference centered on the center of the inner layer,
Each of the sub-strand aggregates is arranged between adjacent outer layer strands. The elevator rope according to claim 1, wherein the plurality of inner layer strands are twisted together and bundled. The elevator rope according to claim 2, wherein the plurality of outer layer strands and the plurality of substrand aggregates are each twisted around the outer periphery of the inner layer. Each of the inner layer strands, each of the outer layer strands, and each of the sub-strands is composed of a plurality of yarns twisted together,
Claims 1 to 3, wherein X1>X2>X3 is established, where the twist ratio of each of the inner layer strands is X1, the twist ratio of each of the outer layer strands is X2, and the twist ratio of each of the sub-strands is X3. The elevator rope described in any one of items up to item 3. The number of the plurality of inner layer strands is three,
The elevator rope according to any one of claims 1 to 4, wherein the number of the plurality of outer layer strands is three. Any one of claims 1 to 5, wherein d1≧d2>d3 holds true, where the diameter of each of the inner layer strands is d1, the diameter of each of the outer layer strands is d2, and the diameter of each of the sub-strands is d3. The elevator rope according to item 1. Further comprising a core rope covering made of resin that covers the outer periphery of the core rope,
The elevator rope according to any one of claims 1 to 6, wherein the plurality of steel strands are twisted around the outer periphery of the core rope via the core rope covering. further comprising a plurality of outer layer strand coverings made of resin, and a plurality of substrand coverings made of resin,
Each of the outer layer strands is covered with the outer layer strand covering,
The elevator rope according to any one of claims 1 to 6, wherein each of the substrand aggregates is covered with the substrand covering. The elevator rope according to any one of claims 1 to 7, wherein each of the inner layer strands, each of the outer layer strands, and each of the sub-strands is impregnated with an impregnating resin. An elevator device comprising the elevator rope according to any one of claims 1 to 9.

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