Elevator rope and elevator belt using same

Abstract

This elevator rope is provided with 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 on the outer periphery of the fiber core. The plurality of synthetic fiber filaments includes a plurality of profiled filaments. The cross-sectional shape of each profiled filament is shaped such that the inter-fiber void is smaller than the inter-fiber void in the case of a circular cross-section.

Description

Technical Field

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

[0002] Conventional hybrid ropes have multiple side strands twisted around a high-strength synthetic fiber core. The high-strength synthetic fiber core comprises a high-strength synthetic fiber rope. The high-strength synthetic fiber rope comprises multiple high-strength synthetic fiber bundles. Each high-strength synthetic fiber bundle is composed of multiple high-strength synthetic fiber filaments (see, for example, Patent Document 1).

[0003] Prior art literature Patent Literature

[0004] [Patent Document 1] Japanese Patent No. 5478718 Summary of the Invention

[0005] Problems to be solved by the invention

[0006] In elevators with long lift strokes, the total length of the elevator rope increases. Therefore, when conventional hybrid ropes are used as elevator ropes, the influence of elastic elongation increases, sometimes causing greater vibration in the car when passengers board or alight. Furthermore, the influence of rope elongation over time also increases.

[0007] The present disclosure has been made to solve the above-mentioned problems, and an object of the present disclosure is to provide an elevator rope capable of suppressing elongation during use and an elevator belt using the elevator rope.

[0008] Means for solving problems

[0009] The elevator rope of the present invention comprises a fiber core including a plurality of synthetic fiber filaments and a plurality of steel strands arranged on the periphery of the fiber core, wherein the plurality of synthetic fiber filaments include a plurality of shaped filaments, each of the shaped filaments having a cross-sectional shape shaped so that inter-fiber spaces are reduced compared to those in the case of a circular cross-section.

[0010] Effects of the Invention

[0011] According to the elevator rope and the elevator belt using the elevator rope of the present disclosure, it is possible to suppress elongation during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a side view which shows the elevator of Embodiment 1.

[0013] Figure 2 yes Figure 1 Cross-section of the main rope.

[0014] Figure 3 To express Figure 2A cross-sectional view of the first example of the cross-sectional structure of the fiber core.

[0015] Figure 4 To express Figure 2 A cross-sectional view of a second example of the cross-sectional structure of a fiber core.

[0016] Figure 5 It is a cross-sectional view showing the cross-sectional structure of a fiber core of a comparative example.

[0017] Figure 6 This is a cross-sectional view showing a first modified example of the main rope according to the first embodiment.

[0018] Figure 7 This is a cross-sectional view showing a second modified example of the main rope according to the first embodiment.

[0019] Figure 8 This is a cross-sectional view of the main rope according to the second embodiment.

[0020] Figure 9 This is a cross-sectional view of the main rope according to the third embodiment.

[0021] Figure 10 This is a cross-sectional view of the main rope according to the fourth embodiment.

[0022] Figure 11 This is a cross-sectional view of a belt according to the fifth embodiment. DETAILED DESCRIPTION

[0023] Hereinafter, embodiments will be described with reference to the drawings.

[0024] Implementation method 1. Figure 1 1 is a side view showing an elevator according to Embodiment 1. Figure 1 In the hoistway 1, a machine room 2 is provided above the hoistway 1. In the machine room 2, a traction machine 3 and a deflector pulley 6 are provided.

[0025] The hoist 3 includes a hoisting machine body 4 and a drive sheave 5. The hoisting machine body 4 includes a hoisting machine motor (not shown) and a hoisting machine brake (not shown). The hoisting machine motor rotates the drive sheave 5. The hoisting machine brake holds the drive sheave 5 stationary. Furthermore, the hoisting machine brake brakes the rotation of the drive sheave 5.

[0026] A plurality of main ropes 7 are wound around the drive sheave 5 and the deflector sheave 6. The plurality of main ropes 7 are elevator ropes.

[0027] The car 8 and the counterweight 9 are suspended in the hoistway 1 by a plurality of main ropes 7. In addition, the car 8 and the counterweight 9 are raised and lowered in the hoistway 1 by rotating the drive sheave 5.

[0028] A pair of car guide rails 10 and a pair of counterweight guide rails 11 are provided in the hoistway 1. Figure 1 In FIG, only one side of the car guide rail 10 and one side of the counterweight guide rail 11 are shown.

[0029] A pair of car guide rails 10 guides the car 8 in ascending and descending directions. A pair of counterweight guide rails 11 guides the counterweight 9 in ascending and descending directions.

[0030] The car 8 includes 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.

[0031] Figure 2 yes Figure 1 1 is a cross-sectional view of the main rope 7, showing a cross section perpendicular to the longitudinal direction of the main rope 7. The main rope 7 of the first embodiment is an 8×S (19) type rope in accordance with JIS G3525.

[0032] The main rope 7 includes 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. In addition, the eight steel strands 22 are stranded on the outer periphery of the fiber core 21.

[0033] The fiber core 21 is arranged at the center of a cross section perpendicular to the longitudinal direction of the main rope 7. The fiber core 21 is composed of a plurality of fiber core strands 23 twisted together. In this example, three fiber core strands 23 are used. That is, the fiber core 21 of the first embodiment is a so-called three-strand rope.

[0034] Each steel strand 22 includes a plurality of steel wires, including a center wire 24 , a plurality of intermediate wires 25 , and a plurality of outer wires 26 .

[0035] The center wire 24 is arranged 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 center wire 24. In this example, nine intermediate wires 25 are used.

[0036] A plurality of outer layer wires 26 are stranded around the outer periphery of the intermediate layer composed 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 is the same as the number of outer layer wires 26.

[0037] The diameter of each outer layer wire 26 is smaller than the diameter of the center wire 24. The diameter of the intermediate wire 25 is smaller than the diameter of the outer layer wire 26.

[0038] Furthermore, when the loads of the car 8 and the counterweight 9 actually act on the main ropes 7 , the steel strands 22 are pressed against the outer periphery of the fiber core 21 .

[0039] Here, each fiber core strand 23 is formed by twisting together multiple yarns. Each yarn is an aggregate of multiple synthetic fiber filaments. That is, the fiber core 21 includes multiple synthetic fiber filaments. In addition, the fiber core 21 is formed by bundling multiple synthetic fiber filaments.

[0040] Figure 3 Yes Figure 2 1 is a cross-sectional view of a first example of the cross-sectional structure of the fiber core 21. Figure 4 Yes Figure 2 2 is a cross-sectional view of a second example of the cross-sectional structure of the fiber core 21. Figure 3 and Figure 4 A portion of the cross section of the fiber core 21 perpendicular to the longitudinal direction of the fiber core 21 is shown in an enlarged manner.

[0041] The plurality of synthetic fiber filaments include a plurality of irregular-shaped filaments 27. In the first embodiment, all of the plurality of synthetic fiber filaments are irregular-shaped filaments 27.

[0042] exist Figure 3 In the first example shown, the cross-sectional shape of each of the special-shaped filaments 27 is a triangle. In this example, the cross-sectional shape of each of the special-shaped filaments 27 is an equilateral triangle.

[0043] exist Figure 4 In the second example shown, the cross-sectional shape of each of the irregularly shaped filaments 27 is a hexagon. In this example, the cross-sectional shape of each of the irregularly shaped filaments 27 is a regular hexagon.

[0044] Figure 5 2 is a cross-sectional view showing the cross-sectional structure of a fiber core of a comparative example. In the comparative example, the cross-sectional shape of each fiber filament 28 is circular.

[0045] Will Figure 3 and Figure 4 and Figure 5 Comparison reveals that the cross-sectional shape of each of the modified filaments 27 is modified from a circular shape so that the inter-fiber space is smaller than that in the case of a circular cross-section.

[0046] That is, in the comparative example, adjacent fiber filaments 28 are in point contact or line contact with each other, so the interfiber spaces are greater than in Examples 1 and 2. In contrast, in Examples 1 and 2, the number of locations where adjacent non-shaped filaments 27 are in surface contact with each other increases, so the interfiber spaces are smaller than in the comparative example.

[0047] Furthermore, high-strength synthetic fiber filaments are used as the various shaped 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 elastic modulus of 500 cN / dtex or more.

[0048] As a material of each of the different-shaped filaments 27 , for example, aramid fiber, PBO (poly(p-phenylene benzobisoxazole)) fiber, or carbon fiber is used.

[0049] 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 space is smaller than that in the case of a circular cross-section.

[0050] Therefore, when the fiber core 21 is subjected to a compressive force from the radially outer side during use of the main rope 7, the diameter of the fiber core 21 is suppressed from shrinking. This can suppress the extension of the main rope 7 during use. As a result, the vibration of the car 8 when passengers board or alight can be suppressed.

[0051] Furthermore, the elongation of the main rope 7 over time can be suppressed, and the trouble of maintenance and inspection can be reduced.

[0052] The cross-sectional shape of each shaped filament 27 is more preferably a polygon, which can suppress the elongation of the main rope 7 during use with a simple structure. The cross-sectional shape of each shaped filament 27 is more preferably a regular polygon with 6 or less vertices.

[0053] Furthermore, high-strength synthetic fiber filaments having a tensile strength of 20 cN / dtex or greater and a tensile modulus of 500 cN / dtex or greater are used as the various shaped filaments 27. This provides a lightweight, high-strength main rope 7, making it easy to use the main rope 7 in high-lift elevators.

[0054] Figure 6 This 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 radially outward, resulting in a circular cross-section perpendicular to the longitudinal direction of each steel strand 22. In other words, the cross-sectional shape of each steel strand 22 is deformed.

[0055] Even with the main ropes 7 of the first modified example, the same effects as those of the first embodiment can be obtained.

[0056] It should be noted that the number of steel strands 22 is not limited to eight.

[0057] Figure 7 This is a cross-sectional view showing a second modification of the main rope 7 of Embodiment 1. In the second modification, twelve steel strands 22 are used. The cross-sectional shape of each steel strand 22 is modified similarly to the first modification.

[0058] Even with the main ropes 7 of the second modified example, the same effects as those of the first embodiment can be obtained.

[0059] Implementation method 2. then, Figure 8 This is a cross-sectional view of the main rope 7 according to the second embodiment, showing a cross section perpendicular to the longitudinal direction of the main rope 7. In addition to the fiber core 21 and the plurality of steel strands 22, the main rope 7 according to the second embodiment further includes a core coating 35. The core coating 35 covers the outer circumference 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.

[0060] A thermoplastic resin can be used as a material for the core coating layer 35. Specifically, as a material for the core coating layer 35, for example, polyethylene, polypropylene, polyvinyl chloride, polyamide, or polyurethane elastomer can be used.

[0061] Furthermore, the core coating layer 35 is provided on the outer periphery of the fiber core 21 through the same manufacturing process as that for providing a coating on cables. Specifically, the core coating layer 35 is provided on the outer periphery of the fiber core 21 by extrusion molding through the center of the fiber core 21.

[0062] The other structures in the second embodiment are the same as those in the first embodiment.

[0063] 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 in the fiber core 21 can be reduced, and the elongation of the main rope 7 can be further suppressed.

[0064] 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.

[0065] It should be noted that it is also possible to Figure 6 The main rope 7 of the first modified example shown is provided with a core coating 35 .

[0066] In addition, you can also Figure 7 The main rope 7 of the second modified example shown is provided with a core coating 35 .

[0067] Implementation method 3. then, Figure 9 This is a cross-sectional view of the main rope 7 of the 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, Figure 7 The outer periphery of the layer composed of the plurality of steel strands 22 in the second modified example shown is covered with an outer coating layer 36 .

[0068] The outer coating layer 36 can be made of a thermoplastic resin. Specifically, an ether-based thermoplastic polyurethane elastomer is preferred for its high friction, wear resistance, and hydrolysis resistance. The outer coating layer 36 may also contain a flame retardant. This makes the outer coating layer 36 flame-retardant.

[0069] The other structures in the third embodiment are the same as those in the second modification.

[0070] In such a main rope 7, the plurality of steel strands 22 do not come into direct contact with the drive sheave 5, and thus wear and damage to the plurality of steel strands 22 can be suppressed.

[0071] It should be noted that it is also possible to Figure 2 The main rope 7 of the illustrated first embodiment is provided with an outer coating 36 .

[0072] In addition, you can also Figure 6 The main rope 7 of the first modified example shown is provided with an outer coating 36 .

[0073] In addition, you can also Figure 8 The main rope 7 of the second embodiment shown is provided with an outer coating 36 .

[0074] Implementation method 4. then, Figure 10 This is a cross-sectional view of the main rope 7 of 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, Figure 7 The fiber core 21 in the second modified example shown 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.

[0075] The other structures in the fourth embodiment are the same as those in the second modification.

[0076] In this manner, the fiber core 21 may be composed of a plurality of fiber core strands 23, and the same effects as those of the first embodiment can be obtained.

[0077] It should be noted that the main rope 7 of the fourth embodiment may also be provided with an outer coating 36 .

[0078] In addition, the core coating layer 35 of the fourth embodiment may be omitted.

[0079] Implementation method 5. then, Figure 11 : is a cross-sectional view of the belt of embodiment 5, showing a cross section perpendicular to the longitudinal direction of the belt. Figure 11 In the middle, belt 41 can replace Figure 1 The main rope 7 of the elevator shown is used. In addition, the belt 41 has a plurality of elevator ropes 42 and a rope coating 43.

[0080] The plurality of elevator ropes 42 are arranged at equal intervals in the width direction of the belt 41. Figure 11 In the fifth embodiment, four elevator ropes 42 are used.

[0081] The structure of each elevator rope 42 is Figure 2 The main ropes 7 of the illustrated embodiment 1 are the same. The plurality of elevator ropes 42 function as strength members.

[0082] The rope coating body 43 covers the entire group consisting of all the elevator ropes 42. That is, the plurality of elevator ropes 42 are integrated by the rope coating body 43.

[0083] The rope covering 43 is made of a thermoplastic resin. Specifically, an ether-based thermoplastic polyurethane elastomer is preferred for its high friction, abrasion resistance, and hydrolysis resistance. The rope covering 43 may also contain a flame retardant. This makes the rope covering 43 flame-retardant.

[0084] In such a belt 41, the extension of each elevator rope 42 during use can also be suppressed. As a result, the vibration of the car 8 when passengers get on and off can be suppressed.

[0085] Furthermore, the elongation of the elevator rope 42 over time can be suppressed, and the labor for maintenance and inspection can be reduced.

[0086] It should be noted that the number of elevator ropes 42 included in the belt 41 is not particularly limited, and may be 3 or less, or 5 or more.

[0087] In addition, the structure of each elevator rope 42 included in the belt 41 may also be the same as Figure 6 The first modification shown, Figure 7 The second variant shown, Figure 8 The embodiment 2 shown, Figure 9 Embodiment 3 shown or Figure 10 The same as the embodiment 4 shown.

[0088] Furthermore, the belt 41 may include a plurality of types of elevator ropes 42 having at least one of a structure and a diameter that is different from each other.

[0089] In addition, the belt 41 may include an elevator rope that does not include the special-shaped filaments 27. That is, it is sufficient that at least one of the plurality of elevator ropes 42 included in the belt 41 includes the special-shaped filaments 27.

[0090] In the first to fifth embodiments, only a portion of all the synthetic fiber filaments included in the fiber core 21 may be used as the modified-shaped filaments 27 .

[0091] In addition, in the first to fifth embodiments, the cross-sectional shape of each of the special-shaped filaments 27 is not limited to a polygonal shape.

[0092] In addition, in the first to fifth embodiments, a plurality of types of modified filaments 27 having different cross-sectional shapes may be combined.

[0093] In addition, in Embodiments 1 to 5, the number of fiber core strands 23 included in the fiber core 21 is not particularly limited.

[0094] In addition, in the first to fifth embodiments, the overall layout of the elevator is not limited to Figure 1 For example, the roping method may be a 2:1 roping method.

[0095] In addition, the elevator may be a machine room-less elevator, a double-deck elevator, a single-shaft multi-car elevator, etc. The single-shaft multi-car elevator is a system in which an upper car and a lower car arranged directly below the upper car independently rise and fall in a common shaft.

[0096] In addition, the elevator rope may be another elevator rope of the main rope 7, such as a compensating rope or a speed governor rope. In addition, the belt may be, for example, a compensating belt used instead of a compensating rope, or a speed governor belt used instead of a speed governor rope.

[0097] Explanation of symbols

[0098] 7 Main rope (elevator rope), 21 Fiber core, 22 Steel strand, 27 Shaped filament (synthetic fiber filament), 41 Belt, 42 Elevator rope, 43 Rope covering.

Claims

1. An elevator rope, wherein: The elevator rope has: A fiber core comprising a plurality of synthetic fiber filaments, and a plurality of steel strands arranged on the periphery of the fiber core, The plurality of synthetic fiber filaments include a plurality of special-shaped filaments, The cross-sectional shape of each of the modified filaments is modified so that the inter-fiber space is smaller than that in the case of a circular cross-section.

2. The elevator rope according to claim 1, wherein The cross-section of each of the shaped filaments is polygonal.

3. The elevator rope according to claim 1 or 2, wherein: As each of the above-mentioned special-shaped filaments, a high-strength synthetic fiber filament having a tensile strength of 20 cN / dtex or more and a tensile elastic modulus of 500 cN / dtex or more is used.

4. An elevator belt, wherein: The elevator belt includes a plurality of elevator ropes arranged at intervals from each other, and a resin rope covering body covering the plurality of elevator ropes. At least one of the plurality of elevator ropes is the elevator rope according to any one of claims 1 to 3.

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