Elevator rope and elevator belt using same

Abstract

An elevator rope according to the present invention comprises a fiber core and a plurality of steel strands. The fiber core includes a plurality of synthetic fiber filaments. The plurality of steel strands are arranged around the periphery of the fiber core. The plurality of synthetic fiber filaments include a plurality of differently shaped filaments. The cross-sectional shape of each differently shaped filament is shaped such that the spaces between the fibers are smaller than the spaces between the fibers when the cross-sectional shape is circular.

Description

Elevator rope and elevator belt using the same

[0001] The present disclosure relates to an elevator rope and an elevator belt using the same.

[0002] In a conventional hybrid rope, multiple side strands are twisted around a high-strength synthetic fiber core. The high-strength synthetic fiber core contains a high-strength synthetic fiber rope. The high-strength synthetic fiber rope contains multiple high-strength synthetic fiber bundles. Each high-strength synthetic fiber bundle is made up of multiple high-strength synthetic fiber filaments (see, for example, Patent Document 1).

[0003] Patent No. 5478718

[0004] In elevators with long travels, the overall length of the elevator rope is also large, so if a conventional hybrid rope is used as the elevator rope, the effect of elastic elongation becomes greater, which can cause the car to vibrate more when passengers get on and off. The effect of rope elongation over time also becomes greater.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide an elevator rope that can suppress elongation during use, and an elevator belt using the same.

[0006] The elevator rope according to the present disclosure comprises a fiber core including a plurality of synthetic fiber filaments, and a plurality of steel strands arranged on the outer periphery of the fiber core, the plurality of synthetic fiber filaments including a plurality of deformed filaments, each of which has a deformed cross-sectional shape such that the inter-fiber voids are reduced compared to the inter-fiber voids in a circular cross section.

[0007] The elevator rope and elevator belt using the same according to the present disclosure can suppress elongation during use.

[0008] FIG. 1 is a side view showing an elevator according to embodiment 1. FIG. 2 is a cross-sectional view of the main rope of FIG. 1. FIG. 3 is a cross-sectional view showing a first example of the cross-sectional structure of the fiber core of FIG. 2. FIG. 4 is a cross-sectional view showing a second example of the cross-sectional structure of the fiber core of FIG. 2. FIG. 5 is a cross-sectional view showing a cross-sectional structure of a fiber core according to a comparative example. FIG. 6 is a cross-sectional view showing a first modified example of the main rope of embodiment 1. FIG. 7 is a cross-sectional view showing a second modified example of the main rope of embodiment 1. FIG. 8 is a cross-sectional view of the main rope according to embodiment 2. FIG. 9 is a cross-sectional view of the main rope according to embodiment 3. FIG. 10 is a cross-sectional view of the main rope according to embodiment 4. FIG. 11 is a cross-sectional view of a belt according to embodiment 5.

[0009] Hereinafter, embodiments will be described with reference to the drawings. Embodiment 1. Figure 1 is a side view showing an elevator according to embodiment 1. In Figure 1, a machine room 2 is provided above a hoistway 1. A hoisting machine 3 and a deflector sheave 6 are installed in the machine room 2.

[0010] The hoist 3 has a hoist main body 4 and a drive sheave 5. The hoist main body 4 has a hoist motor (not shown) and a hoist brake (not shown). The hoist motor rotates the drive sheave 5. The hoist brake keeps the drive sheave 5 stationary. The hoist brake also brakes the rotation of the drive sheave 5.

[0011] A plurality of main ropes 7 are wound around the drive sheave 5 and the deflector sheave 6. Each of the plurality of main ropes 7 is an elevator rope.

[0012] The car 8 and the counterweight 9 are suspended within the hoistway 1 by a plurality of main ropes 7. The car 8 and the counterweight 9 move up and down within the hoistway 1 by rotating the drive sheave 5.

[0013] A pair of car guide rails 10 and a pair of counterweight guide rails 11 are installed in the hoistway 1. In Fig. 1, only one car guide rail 10 and one counterweight guide rail 11 are shown.

[0014] A pair of car guide rails 10 guide the car 8 as it moves up and down. A pair of counterweight guide rails 11 guide the counterweight 9 as it moves up and down.

[0015] The car 8 has a car frame 12 and a car chamber 13. A plurality of main ropes 7 are connected to the car frame 12. The car chamber 13 is supported by the car frame 12.

[0016] 2 is a cross-sectional view of the main rope 7 in FIG. 1, showing a cross section perpendicular to the longitudinal direction of the main rope 7. The main rope 7 in the first embodiment is an 8×S(19) type rope conforming to JIS G 3525.

[0017] The main rope 7 has a fiber core 21 and a plurality of steel strands 22. In this example, eight steel strands 22 are arranged on the outer periphery of the fiber core 21. The eight steel strands 22 are also twisted together on the outer periphery of the fiber core 21.

[0018] The fiber core 21 is disposed at the center of a cross section perpendicular to the longitudinal direction of the main rope 7. The fiber core 21 is formed by twisting together a plurality of fiber core strands 23. In this example, three fiber core strands 23 are used. That is, the fiber core 21 of the first embodiment is a so-called triple-braided rope.

[0019] Each steel strand 22 has a plurality of steel wires. The plurality of steel wires includes a center wire 24, a plurality of intermediate wires 25, and a plurality of outer layer wires 26.

[0020] The central wire 24 is disposed at the center of a cross section perpendicular to the longitudinal direction of the steel strand 22. A plurality of intermediate wires 25 are twisted around the outer periphery of the central wire 24. In this example, nine intermediate wires 25 are used.

[0021] A plurality of outer layer wires 26 are twisted around the outer periphery of an intermediate layer made up of a plurality of intermediate wires 25. In this example, nine outer layer wires 26 are used. That is, in each steel strand 22, the number of intermediate wires 25 and the number of outer layer wires 26 are the same.

[0022] The diameter of each outer layer strand 26 is smaller than the diameter of the central strand 24. The diameter of each intermediate strand 25 is smaller than the diameter of each outer layer strand 26.

[0023] When the load of the car 8 and the counterweight 9 actually acts on the main rope 7, each steel strand 22 is pressed against the outer periphery of the fiber core 21.

[0024] Each fiber core strand 23 is formed by twisting together a plurality of yarns. Each yarn is an aggregate of a plurality of synthetic fiber filaments. That is, the fiber core 21 includes a plurality of synthetic fiber filaments. The fiber core 21 is also formed by bundling a plurality of synthetic fiber filaments.

[0025] Fig. 3 is a cross-sectional view showing a first example of the cross-sectional structure of the fiber core 21 in Fig. 2. Fig. 4 is a cross-sectional view showing a second example of the cross-sectional structure of the fiber core 21 in Fig. 2. Figs. 3 and 4 show enlarged views of a portion of the cross section of the fiber core 21 perpendicular to the longitudinal direction of the fiber core 21.

[0026] The plurality of synthetic fiber filaments includes a plurality of non-circular filaments 27. In the first embodiment, all of the plurality of synthetic fiber filaments are non-circular filaments 27.

[0027] 3, the cross-sectional shape of each of the modified filaments 27 is a triangle. In this example, the cross-sectional shape of each of the modified filaments 27 is an equilateral triangle.

[0028] 4, the cross-sectional shape of each of the modified filaments 27 is a hexagon. In this example, the cross-sectional shape of each of the modified filaments 27 is a regular hexagon.

[0029] 5 is a cross-sectional view showing the cross-sectional structure of a fiber core according to a comparative example, in which the cross-sectional shape of each fiber filament 28 is circular.

[0030] As can be seen by comparing Figures 3 and 4 with Figure 5, the cross-sectional shape of each modified filament 27 is modified from a circular shape so that the inter-fiber voids are reduced compared to the inter-fiber voids in a circular cross section.

[0031] That is, in the comparative example, adjacent fiber filaments 28 are in point contact or line contact with each other, and therefore there are more inter-fiber voids than in the first and second examples. In contrast, in the first and second examples, there are more points of surface contact between adjacent non-circular filaments 27, and therefore there are fewer inter-fiber voids than in the comparative example.

[0032] High-strength synthetic fiber filaments are used as the non-circular filaments 27. The high-strength synthetic fiber filaments are synthetic fiber filaments having a tensile strength of 20 cN / dtex or more and a tensile modulus of elasticity of 500 cN / dtex or more.

[0033] The material of each of the non-circular filaments 27 is, for example, aramid fiber, PBO (poly-paraphenylene benzobisoxazole) fiber, or carbon fiber.

[0034] In such a main rope 7, the fiber core 21 includes a plurality of deformed filaments 27. The cross-sectional shape of each deformed filament 27 is deformed so that the inter-fiber voids are smaller than those in a circular cross section.

[0035] Therefore, when the fiber core 21 receives a compressive force from the radially outer side during use of the main rope 7, the diameter of the fiber core 21 is prevented from shrinking. This makes it possible to suppress the elongation of the main rope 7 during use. As a result, it is possible to suppress vibration of the car 8 when passengers get on and off.

[0036] In addition, the elongation of the main rope 7 over time can be suppressed, reducing the effort required for maintenance and inspection.

[0037] Furthermore, it is more preferable that the cross-sectional shape of each of the modified filaments 27 is a polygon, which has a simple configuration and can suppress the elongation of the main rope 7 during use. It is even more preferable that the cross-sectional shape of each of the modified filaments 27 is a regular polygon with six or less vertices.

[0038] Furthermore, high-strength synthetic fiber filaments having a tensile strength of 20 cN / dtex or more and a tensile modulus of elasticity of 500 cN / dtex or more are used for each of the modified filaments 27. This makes it possible to obtain a lightweight, high-strength main rope 7, which can be easily applied to high-lift elevators.

[0039] 6 is a cross-sectional view showing a first modified example of the main rope 7 of Embodiment 1. In the first modified example, each steel strand 22 is compressed from the radially outer side, so that the cross-sectional shape perpendicular to the longitudinal direction of each steel strand 22 is made circular. In other words, the cross-sectional shape of each steel strand 22 is deformed.

[0040] The main rope 7 according to the first modified example can also provide the same effects as those of the first embodiment.

[0041] The number of steel strands 22 is not limited to eight.

[0042] 7 is a cross-sectional view showing a second modified example of the main rope 7 of the first embodiment. The second modified example uses twelve steel strands 22. The cross-sectional shape of each steel strand 22 is deformed, as in the first modified example.

[0043] The main rope 7 according to the second modified example can also provide the same effects as those of the first embodiment.

[0044] Embodiment 2 Next, Fig. 8 is a cross-sectional view of a main rope 7 according to embodiment 2, showing a cross section perpendicular to the longitudinal direction of the main rope 7. The main rope 7 of embodiment 2 has a core coating 35 in addition to a fiber core 21 and a plurality of steel strands 22. The core coating 35 covers the outer periphery of the fiber core 21. In other words, the core coating 35 is interposed between the fiber core 21 and the plurality of steel strands 22.

[0045] Thermoplastic resin can be used as the material of the core coating 35. Specifically, the material of the core coating 35 can be, for example, polyethylene, polypropylene, polyvinyl chloride, polyamide, or polyurethane elastomer.

[0046] The core coating 35 is formed on the outer periphery of the fiber core 21 by a manufacturing process similar to that used to form coatings on cables. That is, the core coating 35 is formed on the outer periphery of the fiber core 21 by extrusion coating molding with the fiber core 21 passing through the center.

[0047] Other configurations in the second embodiment are the same as those in the first embodiment.

[0048] In such a main rope 7, three gaps between adjacent fiber core strands 23 on the outer periphery of the fiber core 21 are filled with the core coating 35. Therefore, the gaps within the fiber core 21 can be reduced, and the elongation of the main rope 7 can be further suppressed.

[0049] Furthermore, since the fiber core 21 does not come into direct contact with the plurality of steel strands 22, wear and damage to the fiber core 21 can be suppressed.

[0050] The main rope 7 of the first modified example shown in FIG. 6 may be provided with a core coating 35 .

[0051] Also, the main rope 7 of the second modified example shown in FIG.

[0052] Third Embodiment Next, Fig. 9 is a cross-sectional view of a main rope 7 according to a third embodiment, showing a cross section perpendicular to the longitudinal direction of the main rope 7. In the main rope 7 of the third embodiment, the outer periphery of the layer made up of the plurality of steel strands 22 in the second modified example shown in Fig. 7 is covered with an outer layer coating 36.

[0053] The outer coating 36 may be made of a thermoplastic resin. Specifically, an ether-based thermoplastic polyurethane elastomer is preferred as the material for the outer coating 36 from the viewpoints of high friction, abrasion resistance, and hydrolysis resistance. The outer coating 36 may also contain a flame retardant, thereby making the outer coating 36 flame-retardant.

[0054] Other configurations in the third embodiment are the same as those in the second modified example.

[0055] In such a main rope 7, the plurality of steel strands 22 do not come into direct contact with the drive sheave 5, so wear and damage to the plurality of steel strands 22 can be suppressed.

[0056] The main rope 7 of the first embodiment shown in FIG. 2 may be provided with an outer coating 36 .

[0057] Moreover, the main rope 7 of the first modified example shown in FIG. 6 may be provided with an outer coating 36 .

[0058] Moreover, the main rope 7 of the second embodiment shown in FIG. 8 may be provided with an outer coating 36 .

[0059] 10 is a cross-sectional view of the main rope 7 according to the fourth embodiment, showing a cross section perpendicular to the longitudinal direction of the main rope 7. In the main rope 7 of the fourth embodiment, the fiber core 21 in the second modified example shown in FIG. 7 is composed of 19 fiber core strands 23. In addition, the outer periphery of the fiber core 21 is covered with a core coating 35.

[0060] Other configurations in the fourth embodiment are the same as those in the second modified example.

[0061] In this way, the fiber core 21 may be composed of a large number of fiber core strands 23, and the same effects as those of the first embodiment can be obtained.

[0062] The main rope 7 of the fourth embodiment may be provided with an outer layer coating 36 .

[0063] Furthermore, the core coating 35 of the fourth embodiment may be omitted.

[0064] Embodiment 5. Next, Fig. 11 is a cross-sectional view of a belt according to embodiment 5, showing a cross section perpendicular to the longitudinal direction of the belt. In Fig. 11, a belt 41 can be used in place of the elevator main rope 7 shown in Fig. 1. The belt 41 also has multiple elevator ropes 42 and a rope covering 43.

[0065] The elevator ropes 42 are arranged at equal intervals in the width direction of the belt 41. The width direction of the belt 41 is the left-right direction in Figure 11. In the fifth embodiment, four elevator ropes 42 are used.

[0066] The configuration of each elevator rope 42 is the same as that of the main rope 7 of the first embodiment shown in Fig. 2. The elevator ropes 42 function as strength members.

[0067] The rope covering 43 covers the entire group of all the elevator ropes 42. In other words, the multiple elevator ropes 42 are integrated by the rope covering 43.

[0068] The rope covering 43 is made of a thermoplastic resin. Specifically, an ether-based thermoplastic polyurethane elastomer is preferred as the material for the rope covering 43 from the viewpoints of high friction, abrasion resistance, and hydrolysis resistance. The rope covering 43 may also contain a flame retardant, which makes the rope covering 43 flame-retardant.

[0069] Such a belt 41 can also suppress the elongation of each elevator rope 42 during use, thereby suppressing vibration of the car 8 when passengers get on and off.

[0070] In addition, the elongation of the elevator rope 42 over time can be suppressed, reducing the effort required for maintenance and inspection.

[0071] The number of elevator ropes 42 included in the belt 41 is not particularly limited, and may be three or less or five or more.

[0072] Furthermore, the configuration of each elevator rope 42 included in the belt 41 may be the same as that of the first modified example shown in FIG. 6, the second modified example shown in FIG. 7, the second embodiment shown in FIG. 8, the third embodiment shown in FIG. 9, or the fourth embodiment shown in FIG. 10.

[0073] The belt 41 may also include multiple types of elevator ropes 42 that differ from each other in at least one of their configurations and diameters.

[0074] The belt 41 may also include elevator ropes that do not include the irregular filaments 27. That is, it is sufficient that at least one of the multiple elevator ropes 42 included in the belt 41 includes the irregular filaments 27.

[0075] In addition, in the first to fifth embodiments, only a portion of all the synthetic fiber filaments contained in the fiber core 21 may be the non-circular filaments 27 .

[0076] In addition, in the first to fifth embodiments, the cross-sectional shape of each non-circular filament 27 is not limited to a polygon.

[0077] In addition, in the first to fifth embodiments, a plurality of types of non-circular filaments 27 having different cross-sectional shapes may be combined.

[0078] In addition, in the first to fifth embodiments, the number of fiber core strands 23 included in the fiber core 21 is not particularly limited.

[0079] Furthermore, in the first to fifth embodiments, the overall layout of the elevator is not limited to the layout shown in Fig. 1. For example, the roping system may be a 2:1 roping system.

[0080] The elevator may also be a machine room-less elevator, a double-deck elevator, a one-shaft multi-car elevator, etc. In a one-shaft multi-car elevator, an upper car and a lower car located directly below the upper car each independently ascend and descend in a common elevator shaft.

[0081] The elevator rope may also be an elevator rope other than the main ropes 7, such as a compensator rope or a governor rope. The belt may also be, for example, a compensator belt used in place of the compensator rope, or a governor belt used in place of the governor rope.

[0082] 7 Main rope (elevator rope), 21 Fiber core, 22 Steel strand, 27 Deformed filament (synthetic fiber filament), 41 Belt, 42 Elevator rope, 43 Rope sheath.

Claims

1. A fiber core containing a plurality of synthetic fiber filaments, and A plurality of steel strands disposed on the outer periphery of the fiber core Comprising, The plurality of synthetic fiber filaments include a plurality of profiled filaments, An elevator rope in which the cross-sectional shape of each of the profiled filaments is shaped to be deformed so that the inter-fiber voids are reduced compared to the inter-fiber voids in a circular cross-section.

2. The elevator rope according to claim 1, wherein the cross-sectional shape of each of the profiled filaments is polygonal.

3. The elevator rope according to claim 1, wherein, as each of the profiled filaments, a high-strength synthetic fiber filament which is a synthetic fiber filament having a tensile strength of 20 cN / dtex or more and a tensile modulus of elasticity of 500 cN / dtex or more is used.

4. A plurality of elevator ropes arranged at intervals from each other, and A resin rope covering covering the plurality of elevator ropes Comprising, At least one of the plurality of elevator ropes is an elevator belt which is the elevator rope according to any one of claims 1 to 3.