CN115956059A

CN115956059A - Belt, method for manufacturing belt, and elevator

Info

Publication number: CN115956059A
Application number: CN202080103308.2A
Authority: CN
Inventors: 内藤晋也; 肥田政彦; 野口丰弘
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2023-04-11
Also published as: DE112020007544T5; KR20230039708A; JPWO2022044213A1; JP7357803B2; WO2022044213A1

Abstract

The belt has a plurality of ropes and a rope coating body. When a cross section perpendicular to the longitudinal direction of the belt is viewed, the plurality of string bodies are arranged at intervals in the width direction. The rope coating body coats a plurality of rope bodies. The plurality of rope bodies are respectively provided with a core rope. Each core rope has a core fiber bundle made up of 1 or a plurality of twisted high-strength fiber bundles, and a plurality of steel core wire members provided on the outer periphery of the core fiber bundle.

Description

Belt, method for manufacturing belt, and elevator

Technical Field

The invention relates to a belt, a method of manufacturing the belt, and an elevator.

Background

The rope of the conventional hoisting machine has a load support portion and a polymer layer. The outer periphery of the load support portion is covered with a polymer layer. The load bearing portion is constructed of a composite material. The composite material includes a plurality of reinforcing fibers and a polymer matrix. Further, a plurality of reinforcing fibers are oriented parallel to the length direction of the rope. Further, a plurality of reinforcing fibers are bonded to each other by a polymer matrix (for example, see patent document 1).

Further, a conventional belt for an elevator system has a plurality of tension members. Each tensile member has a core member, a plurality of overlapping members, and a jacket material. The core member is composed of a plurality of load supporting fibers (see, for example, patent document 2).

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 5713682

Patent document 2: japanese patent laid-open publication No. 2018-177535

Disclosure of Invention

Problems to be solved by the invention

In the conventional rope described in patent document 1, the outer periphery of the load support portion is covered with only the polymer layer, and there is no binding force between the reinforcing fibers. Therefore, when the diameter of the load supporting portion is increased, the load is not easily transmitted to the vicinity of the center of the load supporting portion, and it is not easy to share the load uniformly among all the reinforcing fibers.

In the belt described in patent document 2, a plurality of overlapping members are provided on the outer periphery of the core member. However, since the core member is manufactured in the same manner as in patent document 1, it is difficult to equally share the load with all the reinforcing fibers as in the rope of patent document 1.

The present invention has been made to solve the above-described problems, and an object thereof is to obtain a belt, a belt manufacturing method, and an elevator, which can share a load more uniformly by a high-strength fiber bundle.

Means for solving the problems

The belt of the present invention comprises: a plurality of string bodies arranged at intervals in a width direction when a cross section perpendicular to the length direction is viewed; and a rope coating body which coats the plurality of rope bodies, wherein each of the plurality of rope bodies has a core rope, and each of the core ropes has: a core fiber bundle comprising 1 or more twisted high-strength fiber bundles; and a plurality of core members made of steel, which are provided on the outer periphery of the core fiber bundle.

Effects of the invention

According to the belt of the present invention, the load can be shared more equally by the high-strength fiber bundles.

Drawings

Fig. 1 is a perspective view showing an elevator according to embodiment 1.

Fig. 2 is a cross-sectional view of the belt of fig. 1.

Fig. 3 is a cross-sectional view of a contact portion of the drive sheave and the belt of fig. 1.

Fig. 4 is a cross-sectional view showing a modification of the crest of fig. 3.

Fig. 5 is a sectional view of the belt of embodiment 2.

Fig. 6 is a cross-sectional view showing the rope body of fig. 5 in an enlarged manner.

Fig. 7 is a sectional view of the belt of embodiment 3.

Fig. 8 is a cross-sectional view showing the rope body of fig. 7 in an enlarged manner.

Fig. 9 is a cross-sectional view of the belt of embodiment 4.

Fig. 10 is a cross-sectional view showing the rope body of fig. 9 in an enlarged manner.

Fig. 11 is a sectional view of the belt of embodiment 5.

Fig. 12 is a sectional view of the belt of embodiment 6.

Fig. 13 is a sectional view of the belt of embodiment 7.

Fig. 14 is a cross-sectional view showing the string body of fig. 13 in an enlarged manner.

Fig. 15 is a cross-sectional view of the belt of embodiment 8.

Fig. 16 is a sectional view of the belt of embodiment 9.

Fig. 17 is a sectional view of the belt of embodiment 10.

Fig. 18 is an enlarged cross-sectional view showing a string of the belt according to embodiment 11.

Fig. 19 is an enlarged cross-sectional view showing a string of the belt of embodiment 12.

Fig. 20 is a side view showing the cord body of fig. 19 with a plurality of layers exposed.

Fig. 21 is a side view showing a first example of the yarn of fig. 20.

Fig. 22 is a side view showing a second example of the yarn of fig. 20.

Fig. 23 is an enlarged cross-sectional view showing a string of the belt according to embodiment 13.

Fig. 24 is a side view showing a plurality of layers constituting the string body of fig. 23 being exposed.

Fig. 25 is an enlarged cross-sectional view showing a string of the belt of embodiment 14.

Fig. 26 is an enlarged cross-sectional view showing a string of the belt according to embodiment 15.

Fig. 27 is an enlarged cross-sectional view of a string body of a belt according to embodiment 16.

Fig. 28 is an enlarged cross-sectional view showing a string of the belt according to embodiment 17.

Fig. 29 is a cross-sectional view of the belt of embodiment 18.

Fig. 30 is a cross-sectional view of the belt of embodiment 19.

Detailed Description

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

Embodiment mode 1

Fig. 1 is a perspective view showing an elevator according to embodiment 1. In the figure, a machine room 2 is provided above a hoistway 1. The machine room 2 is provided with a hoisting machine 3 and a deflector sheave 6.

The hoisting machine 3 includes a hoisting machine main body 4 and a cylindrical drive sheave 5. The hoisting machine main 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 maintains the stationary state of the drive sheave 5. Further, the hoisting machine brake brakes the rotation of the drive sheave 5.

The drive sheave 5 rotates about a horizontal rotation axis. At least 2 belts 7 are wound around the drive sheave 5 and the deflector sheave 6. However, in fig. 1, only 1 belt 7 is shown. The 2 or more belts 7 are disposed at intervals in the axial direction of the drive sheave 5.

A car 8 is connected to a first end of the belt 7 in the longitudinal direction. A counterweight 9 is connected to a second end portion of the belt 7 in the longitudinal direction. A car 8 and a counterweight 9 are suspended in the hoistway 1 by a belt 7. That is, the belt 7 functions as a suspension body. The car 8 and the counterweight 9 are raised and lowered in the hoistway 1 by rotating the drive sheave 5.

A first car guide rail 10a, a second car guide rail 10b, a first counterweight guide rail not shown, and a second counterweight guide rail not shown are provided in the hoistway 1. The first car guide rail 10a and the second car guide rail 10b guide the raising and lowering of the car 8. The first counterweight guide rail and the second counterweight guide rail guide the lifting of the counterweight 9.

A compensating body 11 is suspended between the lower portion of the car 8 and the lower portion of the counterweight 9. The compensating body 11 compensates for the influence of the change in the weight balance of the belt 7 caused by the movement of the car 8. As the compensating body 11, a rope-like member having flexibility, such as a rope or a chain, is used.

Fig. 2 is a cross-sectional view of the belt 7 of fig. 1, showing a cross-section perpendicular to the length direction of the belt 7. The dimension of the belt 7 in the thickness direction is smaller than the dimension of the belt 7 in the width direction. The thickness direction of the belt 7 is a direction parallel to the X axis of fig. 2. The width direction of the belt 7 is a direction parallel to the Y axis of fig. 2. The longitudinal direction of the belt 7 is a direction parallel to the Z axis of fig. 2.

When a cross section perpendicular to the longitudinal direction of the belt 7 is viewed, the belt 7 includes a plurality of rope bodies 21 and a rope coating body 22 made of resin. In fig. 2, 10 rope bodies 21 are used. The plurality of strings 21 are arranged at equal intervals in the width direction of the belt 7. The plurality of strings 21 function as strength members.

The rope coating 22 covers the entire group of all the rope bodies 21. That is, the plurality of rope bodies 21 are integrated by the rope coating body 22.

As the material of the rope coating body 22, an elastomer is used. Further, as the elastomer, an ether-based thermoplastic polyurethane elastomer is preferable from the viewpoint of high friction, abrasion resistance and hydrolysis resistance. The rope coating body 22 may contain a flame retardant. This makes the rope coating body 22 nonflammable.

The plurality of strings 21 are arranged along the longitudinal direction of the belt 7. That is, the longitudinal direction of each string 21 is the longitudinal direction of the belt 7. Further, each of the plurality of rope bodies 21 has a core rope 23. Each rope body 21 of embodiment 1 is constituted only by the core rope 23.

Each core rope 23 has a core fiber bundle 24 and a plurality of core members 25 made of steel. The cross section of each core fiber bundle 24, that is, the cross section perpendicular to the longitudinal direction of the rope body 21, is circular.

The core fiber bundle 24 is composed of 1 or more twisted high-strength fiber bundles. Each high-strength fiber bundle is formed by twisting a plurality of high-strength fiber filaments.

As a material of the high-strength fiber bundle, 1 or more kinds of fibers selected from the group consisting of carbon fibers, glass fibers, PBO (poly-p-phenylene benzobisoxazole) fibers, aramid fibers, polyarylate fibers, and basalt fibers are used.

The plurality of core members 25 are provided on the outer periphery of the core fiber bundle 24. Further, the plurality of core members 25 are twisted on the outer periphery of the core fiber bundle 24. In fig. 2, 12 core wire members 25 are used. As each core member 25, 1 steel wire is used. Each core member 25 has a diameter smaller than that of the core fiber bundle 24.

Fig. 3 is a cross-sectional view of a contact portion between the drive sheave 5 and the belt 7 of fig. 1. At least 2 belts 7 are wound around the outer periphery of the drive sheave 5 at intervals in the axial direction of the drive sheave 5. The axial direction of the drive sheave 5 is the left-right direction in fig. 3. However, in fig. 3, only 1 belt 7 is shown. In fig. 3, the internal structure of the belt 7 is omitted.

The belt grooves 5a are formed on the outer periphery of the drive sheave 5 in the same number as the number of the belts 7. Each belt 7 is inserted into the corresponding belt groove 5a.

The diameter of the portion of the drive sheave 5 that contacts each belt 7 changes so that the center portion of the belt 7 in the width direction protrudes outward in the radial direction of the drive sheave 5 beyond both ends of the belt 7 in the width direction. That is, a crest 5b, a so-called crown, is formed on the bottom surface of each band groove 5a. The radial direction of the drive sheave 5 is the up-down direction of fig. 3.

Fig. 4 is a cross-sectional view showing a modification of the crest 5b of fig. 3. In fig. 3, the cross section of the surface of the ridge portion 5b is a gentle arc-shaped curve. In contrast, in fig. 4, the cross section of the surface of the peak 5b is trapezoidal, that is, a combination of 3 straight lines.

In the belt 7 and the elevator using the belt 7, when a load is applied to the belt 7, the core fiber bundle 24 is radially constrained by the plurality of core wire members 25. Therefore, the load can be shared more evenly by the high-strength fiber bundles constituting the core fiber bundle 24.

Further, since each core fiber bundle 24 is made of a high-strength fiber bundle, the weight and strength of the belt 7 can be reduced, and the belt 7 having a high strength-to-weight ratio can be realized.

Therefore, the belt 7 according to embodiment 1 can be applied to an elevator in which the lift stroke of the car 8 is 75 meters or more.

Further, the belt 7 is more easily bent than a conventional wire rope having the same strength, and therefore, the diameter of the drive sheave 5 can be reduced. For example, the diameter of the drive sheave 5 may be 40 times or less the maximum diameter of the plurality of ropes 21. In embodiment 1, the plurality of strings 21 have the same diameter, and the diameter of each string 21 can be said to be the maximum diameter.

Further, since the belt 7 having a high weight ratio and a high friction coefficient against the drive sheave 5 is obtained, the mass of the compensating body 11 can be reduced. For example, the mass of the compensating body 11 can be set to 1/2 or less of the total weight of all the belts 7. In addition, the compensating body 11 can be completely removed according to the elevating stroke of the car 8.

Further, since each core member 25 is formed of 1 wire, the tape 7 can be easily manufactured.

Further, since the crest portions 5b are provided on the bottom surfaces of the respective belt grooves 5a, positional displacement of the respective belts 7 in the axial direction of the drive sheave 5 can be suppressed.

The method for manufacturing the belt 7 according to embodiment 1 includes the steps of: the rope coating body 22 is continuously coated on all the rope bodies 21 in a state where a uniform tension is applied to all the rope bodies 21. Thus, when a load is applied to the belt 7, the load is dispersed substantially uniformly to all the string bodies 21, and premature damage to a part of the string bodies 21 is suppressed.

Embodiment mode 2

Next, fig. 5 is a cross-sectional view of the belt 7 of embodiment 2, showing a cross-section perpendicular to the longitudinal direction of the belt 7. Each core rope 23 of embodiment 2 includes a core fiber bundle 24 and a plurality of steel core strands 26 as a plurality of core members.

A plurality of core strands 26 are disposed at the outer periphery of the core fiber bundle 24. Further, the plurality of core strands 26 are twisted around the outer periphery of the core fiber bundle 24. In fig. 5, 12 core strands 26 are used. Each core strand 26 has a diameter that is smaller than the diameter of the core fiber bundle 24.

Fig. 6 is a cross-sectional view showing the string body 21 of fig. 5 in an enlarged manner. Each core strand 26 includes a plurality of steel core element wires 27 twisted with each other. Specifically, each core strand 26 has 1 central core element wire and 6 outer peripheral core element wires.

The center core element wire is the core element wire 27 disposed in the center of the core strand 26. Each outer peripheral element wire is a core element wire 27 twisted around the outer periphery of the central element wire. All the core element wires 27 have the same diameter as each other.

The structure of the other belt 7 is the same as that of embodiment 1, except that a plurality of core strands 26 are used instead of the plurality of core members 25. The method of manufacturing the belt 7 and the structure of the elevator are also the same as those in embodiment 1.

The same effects as those in embodiment 1 can be obtained by the belt 7 and the elevator using the belt 7.

Further, since the plurality of core strands 26 are used instead of the plurality of core members 25, the flexibility of the belt 7 can be further improved.

Further, the core member 25 of embodiment 1 and the core strand 26 of embodiment 2 may be mixed on the outer periphery of the core fiber bundle 24.

Embodiment 3

Next, fig. 7 is a cross-sectional view of the belt 7 of embodiment 3, showing a cross-section perpendicular to the longitudinal direction of the belt 7. Each of the rope bodies 21 of embodiment 3 has a core rope 23, a first outer circumferential fiber layer 28, and a first strand layer 29.

The core rope 23 of embodiment 3 has a core fiber bundle 24 and 6 core strands 26. The 6 core strands 26 are twisted around the outer periphery of the core fiber bundle 24. The diameter of each core strand 26 is the same or substantially the same as the diameter of the core fiber bundle 24.

A first outer circumferential fiber layer 28 is provided at the outer circumference of the core rope 23. The first outer peripheral fiber layer 28 is composed of a high-strength fiber bundle similar to the core fiber bundle 24. The first outer circumferential fiber layer 28 has a circular cross-sectional shape perpendicular to the longitudinal direction of the string body 21.

The first strand layer 29 is arranged at the periphery of the first peripheral fibre layer 28. In addition, the first strand layer 29 has a plurality of first outer layer strands 30. A plurality of first outer layer strands 30 are twisted about the outer periphery of the first peripheral fiber layer 28. In fig. 7, 20 first outer layer strands 30 are used. That is, the number of first outer layer strands 30 is greater than the number of core strands 26.

Fig. 8 is a cross-sectional view showing the string body 21 of fig. 7 in an enlarged manner. Each of the first outer layer strands 30 includes a plurality of first outer layer element wires 31 made of steel twisted with each other. Specifically, each of the first outer layer strands 30 has 1 first center element wire and 6 first outer peripheral element wires.

The first center element wire is the first outer layer element wire 31 arranged at the center of the first outer layer strand 30. Each of the first outer peripheral element wires is the first outer layer element wire 31 twisted around the outer periphery of the first center element wire. All the first outer layer element wires 31 have the same diameter as each other.

Further, the diameter of each first outer layer element wire 31 is the same as the diameter of each core element wire 27. Further, the diameter of each first outer layer strand 30 is the same as the diameter of each core strand 26. That is, in this example, the same steel strand as each core strand 26 is used as each first outer layer strand 30.

The structure of the other belt 7 is the same as that of embodiment 2, except that the first outer peripheral fiber layer 28 and the first strand layer 29 are provided outside the core cord 23. The method of manufacturing the belt 7 and the structure of the elevator are the same as those in embodiment 1.

The same effects as those in embodiment 2 can be obtained by the belt 7 and the elevator using the belt 7.

Further, when a load is applied to the belt 7, the core fiber bundle 24 is constrained by the plurality of core strands 26 in the radial direction. Further, the first outer peripheral fiber layer 28 is radially constrained by a plurality of first outer layer strands 30. Therefore, even if the diameter of each rope body 21 is increased, the load can be shared more evenly by the high-strength fiber bundles included in the rope bodies 21.

Embodiment 4

Next, fig. 9 is a sectional view of the belt 7 of embodiment 4, showing a section perpendicular to the longitudinal direction of the belt 7. Each of the rope bodies 21 of embodiment 4 has a core rope 23, a first outer circumferential fiber layer 28, a first strand layer 29, a second outer circumferential fiber layer 32, and a second strand layer 33.

A second peripheral fiber layer 32 is disposed at the periphery of the first strand layer 29. The second peripheral fiber layer 32 is composed of a high-strength fiber bundle similar to the core fiber bundle 24. The second peripheral fiber layer 32 has an annular cross-sectional shape perpendicular to the longitudinal direction of the string body 21.

The second strand layer 33 is provided on the outer periphery of the second peripheral fiber layer 32. Further, the second strand layer 33 has a plurality of second outer layer strands 34. A plurality of second outer layer strands 34 are twisted about the outer periphery of the second peripheral fibrous layer 32. In fig. 9, 32 second outer layer strands 34 are used. That is, the number of second outer layer strands 34 is greater than the number of first outer layer strands 30.

Fig. 10 is a cross-sectional view showing the rope body 21 of fig. 9 in an enlarged manner. Each of the second outer layer strands 34 includes a plurality of second outer layer element wires 35 made of steel twisted with each other. Specifically, each of the second outer layer strands 34 has 1 second center element wire and 6 second peripheral element wires.

The second center element wire is the second outer layer element wire 35 arranged at the center of the second outer layer strand 34. Each second outer element wire is a second outer layer element wire 35 twisted around the outer periphery of the second center element wire. All the second outer layer element wires 35 have the same diameter as each other.

Further, the diameter of each second-outer-layer element wire 35 is the same as the diameter of each core element wire 27, and the diameter is the same as the diameter of each first-outer-layer element wire 31. Further, the diameter of each second outer layer strand 34 is the same as the diameter of each core strand 26, and the diameter of each first outer layer strand 30. That is, in this example, the same steel strands as the core strands 26 and the first outer layer strands 30 are used as the second outer layer strands 34.

The structure of the other tapes 7 is the same as that of embodiment 3, except that the second peripheral fiber layer 32 and the second strand layer 33 are provided outside the first strand layer 29. The method of manufacturing the belt 7 and the structure of the elevator are the same as those in embodiment 1.

The same effects as those of embodiment 3 can be obtained by the belt 7 and the elevator using the belt 7.

Further, upon application of a load to the belt 7, the second peripheral fiber layer 32 is radially constrained by the plurality of second outer layer strands 34. Therefore, even if the diameter of each rope body 21 is further increased, the load can be shared more evenly by the high-strength fiber bundles included in the rope bodies 21.

In addition, as the core strands 26, the first outer layer strands 30, and the second outer layer strands 34, steel strands having different structures and diameters may be used.

Further, 3 or more high-strength fiber bundle layers and 3 or more strand layers may be provided outside the core rope 23.

Embodiment 5

Next, fig. 11 is a sectional view of the belt 7 of embodiment 5, showing a section perpendicular to the longitudinal direction of the belt 7. A center line member 36 made of steel is provided at the center of each core fiber bundle 24. As each of the center line members 36, 1 steel wire is used. The centerline members 36 are continuously arranged along the longitudinal direction of the string body 21.

Each core rope 23 of embodiment 5 includes a core fiber bundle 24, a plurality of core members 25, and a core member 36. In this example, the same steel wire as that of each core member 25 is used as the center wire member 36.

The structure of the other belt 7 is the same as that of embodiment 1, except that the center line member 36 is provided at the center of each core fiber bundle 24. The method of manufacturing the belt 7 and the structure of the elevator are also the same as those in embodiment 1.

Further, since the center line member 36 is provided at the center of each core fiber bundle 24, the core fiber bundle 24 can be arranged around the center line member 36 with the center line member 36 as the center when forming the core fiber bundle 24. This makes it easy to form the core fiber bundle 24 into a circular cross-sectional shape, and to form the cord body 21 into a circular cross-sectional shape.

The center wire member 36 may be a steel wire having a diameter different from that of each of the core wire members 25.

Embodiment 6

Next, fig. 12 is a sectional view of the belt 7 of embodiment 6, showing a section perpendicular to the longitudinal direction of the belt 7. The belt 7 according to embodiment 6 is the same as the belt 7 according to embodiment 2, except that a center line member 36 is provided at the center of each core fiber bundle 24. Each of the center line members 36 is the same as the center line member 36 of embodiment 5. The method of manufacturing the belt 7 and the structure of the elevator are the same as those in embodiment 1.

The same effects as those in embodiment 5 can be obtained by the belt 7 and the elevator using the belt 7.

Further, since a plurality of core strands 26 are used, the flexibility of the belt 7 can be further improved.

Embodiment 7

Next, fig. 13 is a sectional view of the belt 7 of embodiment 7, showing a section perpendicular to the longitudinal direction of the belt 7. A center strand 37 made of steel is provided as a center line member at the center of each core fiber bundle 24 in embodiment 7. The center strands 37 are continuously arranged along the longitudinal direction of the cord body 21.

Fig. 14 is an enlarged cross-sectional view showing the string body 21 of fig. 13. Each center strand 37 comprises a plurality of steel center strand wires 38 twisted with each other. Specifically, each of the center strands 37 has 1 third center element wire and 6 third outer peripheral element wires.

The third center element wire is the center strand element wire 38 arranged at the center of the center strand 37. Each third outer peripheral element wire is a center strand element wire 38 twisted around the outer periphery of the third center element wire. All the center strand element wires 38 have the same diameter as each other.

Further, the diameter of each center strand wire 38 is the same as the diameter of each core wire 27. Further, the diameter of each center strand 37 is the same as the diameter of each core strand 26. That is, in this example, the same steel strands as the core strands 26 are used as the center strands 37.

The belt 7 of embodiment 7 is the same as the belt 7 of embodiment 6, except that a center strand 37 is provided at the center of each core fiber bundle 24. The method of manufacturing the belt 7 and the structure of the elevator are the same as those in embodiment 1.

The same effects as those in embodiment 6 can be obtained by the belt 7 and the elevator using the belt 7.

Further, since the center strand 37 is used instead of the center wire member 36 made of a steel wire, the flexibility of the belt 7 can be further improved.

Embodiment 8

Next, fig. 15 is a sectional view of the belt 7 of embodiment 8, showing a section perpendicular to the longitudinal direction of the belt 7. In each of the ropes 21 of embodiment 8, a center strand 37 similar to that of embodiment 7 is provided at the center of the core fiber bundle 24 of embodiment 3. The center strands 37 are continuously arranged along the longitudinal direction of the cord body 21.

In each core rope 23 of embodiment 8, 12 core strands 26 are used. In addition, in the first strand layer 29 of embodiment 8, 24 first outer layer strands 30 are used.

The structure of the belt 7 is the same as that of embodiment 3, except that the center strand 37 is provided at the center of each core fiber bundle 24, the number of core strands 26, and the number of first outer layer strands 30. The method of manufacturing the belt 7 and the structure of the elevator are the same as those in embodiment 1.

The same effects as those in embodiment 3 can be obtained by the belt 7 and the elevator using the belt 7.

In forming the core fiber bundle 24, the core fiber bundle 24 may be disposed around the center strand 37 with the center strand 37 as the center. This makes it easy to form the core fiber bundle 24 into a circular cross-sectional shape, and to form the cord body 21 into a circular cross-sectional shape.

Further, since the center strands 37 are used as the center line members, the flexibility of the belt 7 can be further improved.

Embodiment 9

Next, fig. 16 is a sectional view of the belt 7 of embodiment 9, showing a section perpendicular to the longitudinal direction of the belt 7. In each of the ropes 21 of embodiment 9, a center strand 37 similar to that of embodiment 7 is provided at the center of the core fiber bundle 24 of embodiment 4. The center strands 37 are continuously arranged along the longitudinal direction of the cord body 21.

In addition, 8 core strands 26 are used in each core rope 23 of embodiment 9. Further, in the second strand layer 33 of embodiment 9, 28 second outer layer strands 34 are used.

The configuration of the belt 7 is the same as that of embodiment 4 except that the center strands 37, the number of core strands 26, and the number of second outer layer strands 34 are provided at the center of each core fiber bundle 24. The method of manufacturing the belt 7 and the structure of the elevator are the same as those in embodiment 1.

The same effects as those in embodiment 4 can be obtained by the belt 7 and the elevator using the belt 7.

In forming the core fiber bundle 24, the core fiber bundle 24 may be disposed around the center strand 37 with the center strand 37 as the center. This makes it easy to make the cross-sectional shape of the core fiber bundle 24 circular, and makes it easy to make the cross-sectional shape of the string body 21 circular.

Embodiment 10

Next, fig. 17 is a sectional view of the belt 7 of embodiment 10, showing a section perpendicular to the longitudinal direction of the belt 7. In each cord body 21 of embodiment 10, a core resin layer 39 is interposed between the core fiber bundle 24 and the layers of the plurality of core wire members 25.

As a material of the core resin layer 39, a resin having high abrasion resistance and low friction, such as polyethylene or polypropylene, is used.

The structure of the belt 7 is the same as that of embodiment 1, except that the core resin layer 39 is provided on the outer periphery of the core fiber bundle 24. The method of manufacturing the belt 7 and the structure of the elevator are also the same as those in embodiment 1.

Further, since the core resin layer 39 is provided at the boundary between the core fiber bundle 24 and the layers of the plurality of core members 25, abrasion of the core fiber bundle 24 due to contact with the plurality of core members 25 can be suppressed.

In embodiments 2 to 9, the core resin layer 39 may be provided on the outer periphery of the core fiber bundle 24.

In embodiments 3, 4, 8, and 9, the first outer peripheral resin layer similar to the core resin layer 39 may be provided on the outer periphery of the first outer peripheral fiber layer 28.

In embodiments 4 and 9, a second outer resin layer similar to the core resin layer 39 may be provided on the outer periphery of the second outer fiber layer 32.

Embodiment mode 11

Next, fig. 18 is an enlarged cross-sectional view showing the string body 21 of the belt 7 according to embodiment 11. The overall cross-section of the belt 7 is the same as in fig. 13.

A central fiber core 40 is provided in the center of each central strand 37 of embodiment 11. Further, a strand fiber core 41 is provided at the center of each core strand 26. Each of the center fiber cores 40 and the strand fiber cores 41 is formed of a high-strength fiber bundle similar to the core fiber bundle 24.

Each central strand 37 has a central fiber core 40 and 6 central strand elements 38. The 6 central strand wires 38 are twisted around the periphery of the central fiber core 40.

Each core strand 26 has a strand fiber core 41 and 6 core element wires 27. The 6 core element wires 27 are twisted around the outer periphery of the strand fiber core 41.

The structure of the belt 7 is the same as that of embodiment 7, except for the structure of each center strand 37 and the structure of each core strand 26. The method of manufacturing the belt 7 and the structure of the elevator are the same as those in embodiment 1.

The same effects as those of embodiment 7 can be obtained by the belt 7 and the elevator using the belt 7.

Further, a center fiber core 40 is provided in the center of each center strand 37. Further, a strand fiber core 41 is provided at the center of each core strand 26. Therefore, the weight of the belt 7 can be reduced. Further, an improvement in the strength-to-weight ratio can be achieved.

The strand fiber core 41 does not need to be provided on all the core strands 26. That is, the strand fiber core 41 may be provided in at least 1 core strand 26.

In embodiments 2 to 4, 6, 8, and 9, the strand fiber core 41 may be provided in the center of at least 1 core strand 26.

In embodiments 3, 4, 8, and 9, the first outer layer fiber core made of the high-strength fiber bundle may be provided in the center of at least 1 first outer layer strand 30.

In embodiments 4 and 9, a second outer layer fiber core made of a high-strength fiber bundle may be provided in the center of at least 1 second outer layer strand 34.

In embodiments 8 and 9, the center fiber core 40 may be provided in the center of the center strand 37.

In the case where the fiber core is provided at the center of the strand, a core resin layer similar to the core resin layer 39 of embodiment 10 may be interposed between the resin layer and the layers of the plurality of strands therearound. This can suppress abrasion of the fiber core.

Embodiment 12

Next, fig. 19 is an enlarged cross-sectional view showing the string body 21 of the belt 7 according to embodiment 12. The overall cross section of the belt 7 is substantially the same as that of fig. 7.

In each core rope 23 of embodiment 12, 12 core strands 26 are used. In each first strand layer 29, 8 first outer layer strands 30 are used. Each core strand 26 has a smaller diameter than each first outer layer strand 30. The number of core strands 26 is greater than the number of first outer layer strands 30.

Each first outer layer strand 30 is composed of 19 first outer layer element wires 31. Specifically, each of the first outer layer strands 30 has 1 first center element wire, 9 first intermediate element wires, and 9 first outer peripheral element wires.

The first center element wire is the first outer layer element wire 31 arranged at the center of the first outer layer strand 30. Each of the first intermediate element wires is the first outer layer element wire 31 twisted around the outer periphery of the first center element wire. Each of the first outer-periphery element wires is a first outer-layer element wire 31 twisted on the outer periphery of the layer of the 9 first intermediate element wires.

Each of the first intermediate element wires has a diameter smaller than that of the first center element wire and smaller than that of the first outer peripheral element wire. All the core element wires 27 have a smaller diameter than any of the first outer layer element wires 31.

The high-strength fiber bundle constituting the core fiber bundle 24 and the high-strength fiber bundle constituting the first outer peripheral fiber layer 28 are each configured by bundling a plurality of yarns 50. Each yarn 50 has a diameter of about 1mm.

Fig. 20 is a side view showing a plurality of layers constituting the string body 21 of fig. 19 exposed. The plurality of yarns 50 are arranged parallel to the longitudinal direction of the cord body 21.

Fig. 21 is a side view showing a first example of the yarn 50 of fig. 20. Figure 22 is a side view illustrating a second example of the yarn 50 of figure 20. Each yarn 50 is formed by bundling a plurality of high-strength fiber filaments 51. The high strength fiber filament 51 is a filament of the minimum unit of the high strength fiber. The diameter of each high-strength fiber filament 51 is several μm to several tens μm.

In the first example, the high-strength fiber filaments 51 are arranged in parallel to the longitudinal direction of the string body 21. In the second example, the plurality of high-strength fiber filaments 51 are twisted with each other.

The structure of the belt 7 is the same as that of embodiment 3, except for the cross-sectional structure of each cord body 21 shown in fig. 19. The method of manufacturing the belt 7 and the structure of the elevator are the same as those in embodiment 1.

Further, since the high-strength fiber bundle is configured by bundling a plurality of yarns 50, the core fiber bundle 24 and the first outer peripheral fiber layer 28 can be easily manufactured as compared with a case where a plurality of high-strength fiber filaments 51 not bundled into the yarns 50 are processed.

The plurality of yarns 50 are arranged parallel to the longitudinal direction of the string body 21. This increases the elastic modulus in the longitudinal direction of the entire belt 7, and can suppress the elongation of the belt 7.

However, when the belt 7 is bent, a compressive stress is applied to the yarn 50 on the inner side in the bending direction than the cross-sectional center of the rope body 21, and a load cannot be uniformly applied to the entire high-strength fiber bundle. Therefore, the belt 7 of embodiment 12 is effective when the string body 21 is relatively thin. The belt 7 according to embodiment 12 is preferably applied to an elevator in which the ratio of the diameter D of the drive sheave 5 to the diameter D of the rope body 21, that is, the bending radius ratio D/D is large.

In addition, in the case where the plurality of high-strength fiber filaments 51 are arranged in parallel to the longitudinal direction of the string body 21 as in the first example, the effect as the high-strength fiber bundle can be more exhibited.

On the other hand, when twisting the plurality of high-strength fiber filaments 51 as in the second example, it is not necessary to make the lengths of the plurality of high-strength fiber filaments 51 the same, and the yarn 50 can be easily manufactured.

Embodiment mode 13

Next, fig. 23 is an enlarged cross-sectional view showing the string body 21 of the belt 7 according to embodiment 13. Fig. 24 is a side view showing a plurality of layers constituting the string body 21 of fig. 23 exposed. In embodiment 13, each of the plurality of yarns 50 is twisted.

The core fiber bundle 24 and the first outer peripheral fiber layer 28 are composed of a plurality of high-strength fiber strands 52. Each high-strength fiber strand 52 is formed by twisting a plurality of yarns 50.

In fig. 23, the first peripheral fiber layer 28 is composed of 8 high-strength fiber strands 52. Further, the core fiber bundle 24 is composed of 1 high-strength fiber strand 52.

The structure of the band 7 is the same as that of embodiment 3, except that the high-strength fiber bundle is formed by bundling a plurality of yarns 50 and that the plurality of yarns 50 are twisted. The method of manufacturing the belt 7 and the structure of the elevator are the same as those in embodiment 1.

Further, since the high-strength fiber bundle is configured by bundling a plurality of yarns 50, the core fiber bundle 24 and the first outer peripheral fiber layer 28 can be easily manufactured.

Further, since the plurality of yarns 50 are twisted, the compressive stress generated in the high-strength fiber bundle can be reduced. Thus, even when a material having a relatively low compression resistance is used as a material for the high-strength fiber bundle, damage to each high-strength fiber filament 51 can be suppressed.

The high-strength fiber bundles constituting the core fiber bundle 24 and the first outer peripheral fiber layer 28 are composed of a plurality of high-strength fiber strands 52. By twisting the plurality of yarns 50 in this manner, the load can be shared by the entire high-strength fiber strands 52.

Further, by twisting a plurality of yarns 50, even if there is a joint of the yarns 50 in the middle of the high-strength fiber strands 52 in the longitudinal direction, the strength of the entire rope body 21 can be ensured. Therefore, the yarn 50 does not need to be continuously connected over the entire length of the rope 21, and the manufacturing cost of the yarn 50 can be reduced. That is, in each high-strength fiber strand 52, there may be a plurality of joints that join the yarns 50 adjacent in the longitudinal direction of the high-strength fiber strand 52.

In embodiments 12 and 13, it is preferable that each yarn 50 is molded using a yarn resin. This can facilitate handling of the yarn 50.

Examples of the method for molding using a yarn resin include the following methods: the yarn is resin-impregnated into a bundle of a plurality of high-strength fiber filaments 51, and is molded to have a circular cross section. Further, the following methods may be mentioned: the outer periphery of the bundle of the high-strength fiber filaments 51 is covered with a yarn resin and molded to have a circular cross section.

As the yarn resin, a flexible resin is preferably used in order to ensure flexibility of each string 21 and flexibility of the entire belt 7. As the flexible resin, an epoxy resin or a urethane resin is preferably used. These flexible resins are not broken when subjected to an external force, and can be easily bent.

The epoxy resin as the yarn resin is a solid obtained by mixing a liquid main agent and an admixture and curing the mixture. The main agent is selected from the group consisting of epoxy compounds and epoxidized polybutadiene. The epoxy compound contains 1 or more bonds selected from the group consisting of a polyoxyalkylene bond and a urethane bond and 2 or more epoxy groups in a molecule. The epoxidized polybutadiene contains 2 or more epoxy groups in its molecule.

When a polyurethane resin is used as the yarn resin, an ether polyurethane resin is preferably used from the viewpoint of hydrolysis resistance. Examples of the ether-based polyurethane resin include resins obtained by curing an ether-based polyol with various polyisocyanate compounds. As the ether polyol, polytetramethylene ether glycol, polypropylene glycol, or the like can be used.

By using such an epoxy resin or a urethane resin, the yarn 50 can be easily molded into a circular shape. Further, the adhesion to the high-strength fiber filaments 51 can be improved. Further, flexibility after curing can be sufficiently ensured.

In addition, only a part of the yarns 50 of the plurality of yarns 50 may be molded with the yarn resin. That is, at least 1 yarn 50 may be molded using a yarn resin.

Embodiment 14

Next, fig. 25 is an enlarged cross-sectional view showing the string body 21 of the belt 7 according to embodiment 14. In embodiment 14, the outer periphery of each high-strength fiber strand 52 is covered with a strand covering 53 made of resin. As a material of the strand coating 53, a resin having high abrasion resistance and low friction, such as polyethylene or polypropylene, is used.

The structure of the belt 7 is the same as that of embodiment 13, except that the outer periphery of each high-strength fiber strand 52 is covered with a strand covering 53 made of resin. The method of manufacturing the belt 7 and the structure of the elevator are the same as those in embodiment 1.

The same effects as those of embodiment 13 can be obtained by the belt 7 and the elevator using the belt 7.

Further, since the outer peripheries of the high-strength fiber strands 52 are covered with the strand covering bodies 53 made of resin, abrasion of the high-strength fiber strands 52 can be suppressed.

In addition, the strand coating 53 may be provided only on a part of the high-strength fiber strands 52 among the plurality of high-strength fiber strands 52. That is, at least 1 high-strength fiber strand 52 may be covered with the strand cover 53.

Embodiment 15

Next, fig. 26 is an enlarged cross-sectional view showing the string body 21 of the belt 7 according to embodiment 15. In embodiment 15, each high-strength fiber strand 52 is compression-processed from the outer periphery. As a result, the shape of the cross section perpendicular to the longitudinal direction of each high-strength fiber strand 52 is deformed into a circular shape.

Further, the plurality of high-strength fiber strands 52 constituting the first outer circumferential fiber layer 28 are collectively covered with the strand covering body 53. No strand coating 53 is provided on the high-strength fiber strands 52 constituting the core fiber bundle 24.

The structure of the belt 7 is the same as that of embodiment 14, except for the cross-sectional structure of each cord body 21 shown in fig. 26. The method of manufacturing the belt 7 and the structure of the elevator are the same as those in embodiment 1.

The same effects as those of embodiment 14 can be obtained by the belt 7 and the elevator using the belt 7.

In addition, since the cross-sectional shape of each high-strength fiber strand 52 is deformed into a circular shape, the packing density of the high-strength fibers can be increased.

In addition, only a part of the high-strength fiber strands 52 among the plurality of high-strength fiber strands 52 may have a cross-sectional shape that is deformed into a circular shape. That is, the cross-sectional shape of at least 1 high-strength fiber strand 52 may be deformed into a circular shape.

Embodiment 16

Next, fig. 27 is an enlarged cross-sectional view showing the string body 21 of the belt 7 according to embodiment 16. In embodiment 16, each first outer layer strand 30 is compression-processed from the outer periphery. As a result, the shape of the cross section perpendicular to the longitudinal direction of each first outer layer strand 30 is deformed into a circular shape.

In each core rope 23 of embodiment 16, 12 core strands 26 are used. In each first strand layer 29, 20 first outer layer strands 30 are used. Each core strand 26 has a smaller diameter than each first outer layer strand 30.

Each first outer layer strand 30 is composed of 19 first outer layer element wires 31 as in embodiment 12. Specifically, each of the first outer layer strands 30 has 1 first center element wire, 9 first intermediate element wires, and 9 first outer peripheral element wires.

The structure of the belt 7 is the same as that of embodiment 3, except for the cross-sectional structure of each cord body 21 shown in fig. 27. The method of manufacturing the belt 7 and the structure of the elevator are the same as those in embodiment 1.

Further, since the cross-sectional shape of each first outer layer strand 30 is shaped into a circle, the contact surface pressure of each first outer layer strand 30 with respect to the first outer circumferential fiber layer 28 decreases. This can suppress damage to the first outer peripheral fiber layer 28.

In addition, only a part of the first outer layer strands 30 among the plurality of first outer layer strands 30 may have a cross-sectional shape that is shaped into a circular shape. That is, the cross-sectional shape of at least 1 first outer layer strand 30 may be shaped into a circular shape.

In embodiments including a plurality of first outer layer strands 30 other than embodiment 3, the cross-sectional shape of at least 1 first outer layer strand 30 may be shaped into a circular shape.

Embodiment 17

Next, fig. 28 is an enlarged cross-sectional view showing the string body 21 of the belt 7 according to embodiment 17. In embodiment 17, each core strand 26 is compression-processed from the outer periphery. As a result, the shape of the cross section perpendicular to the longitudinal direction of each core strand 26 is deformed into a circular shape.

The structure of the belt 7 is the same as that of embodiment 16, except for the cross-sectional structure of each cord body 21 shown in fig. 28. The method of manufacturing the belt 7 and the structure of the elevator are the same as those in embodiment 1.

The same effects as those in embodiment 16 can be obtained by the belt 7 and the elevator using the belt 7.

Further, since the cross-sectional shape of each core strand 26 is deformed into a circular shape, the contact surface pressure of each core strand 26 with respect to the first outer circumferential fiber layer 28 is reduced. Further, the contact surface pressure of each core strand 26 with respect to the core fiber bundle 24 is decreased. This can suppress damage to the first outer peripheral fiber layer 28 and the core fiber bundle 24.

In addition, only a part of the core strands 26 among the plurality of core strands 26 may have a cross-sectional shape that is shaped into a circular shape. That is, the cross-sectional shape of at least 1 core strand 26 may be deformed into a circular shape.

In embodiments other than embodiment 16, which include a plurality of core strands 26, the cross-sectional shape of at least 1 core strand 26 may be deformed into a circular shape.

In addition, in the embodiment including the plurality of second outer layer strands 34, the cross-sectional shape of at least 1 second outer layer strand 34 may be shaped into a circular shape.

In the embodiment including the plurality of central strands 37, the cross-sectional shape of at least 1 central strand 37 may be shaped into a circle.

Embodiment 18

Next, fig. 29 is a sectional view of the belt 7 of embodiment 18, showing a section perpendicular to the longitudinal direction of the belt 7. In the belt 7 according to embodiment 18, the plurality of string members 21 includes 2 or more string members 21 having different cross sections. The difference in cross section means that at least either one of the diameter and the cross-sectional structure of the cross section is different. In this example, the plurality of string bodies 21 includes 2 kinds of string bodies 21 having different diameters from each other.

Specifically, the diameters of the 4 string bodies 21 disposed at both ends in the width direction of the belt 7 are smaller than the diameters of the 6 string bodies 21 disposed at the center in the width direction of the belt 7.

The structure of the belt 7 is the same as that of embodiment 11, except that 2 kinds of ropes 21 different from each other in diameter are included. The method of manufacturing the belt 7 and the structure of the elevator are the same as those in embodiment 1.

The same effects as those of embodiment 11 can be obtained by the belt 7 and the elevator using the belt 7.

As shown in fig. 3 and 4, when the belt 7 is wound around the drive sheave 5 on which the crest 5b is formed, the tension applied to each of the plurality of rope bodies 21 differs depending on the position of the belt 7 in the width direction. In this case, the string bodies 21 having different cross sections may be arranged according to the position of the belt 7 in the width direction. This can equalize the load sharing among the respective rope bodies 21.

The plurality of string bodies 21 may include 3 or more kinds of string bodies 21 having different diameters.

Further, a plurality of types of the string bodies 21 selected from embodiments 1 to 17 may be combined and arranged in the common belt 7.

Embodiment 19

Next, fig. 30 is a sectional view of the belt 7 of embodiment 19, showing a section perpendicular to the longitudinal direction of the belt 7. The belt 7 of embodiment 19 has 8 rope bodies 21.

The 8 cord bodies 21 are provided in this order from one end of the belt 7 in the width direction to the other end as a first cord body, a second cord body, 82308230a eighth cord body. At this time, the interval between the second string and the third string, and the interval between the sixth string and the seventh string are larger than the intervals between the other adjacent strings 21. That is, the intervals of the string bodies 21 adjacent in the width direction of the belt 7 include 2 kinds of intervals different from each other.

In this way, when 3 or more string bodies 21 are included in the belt 7, the intervals between the adjacent string bodies 21 may include a plurality of different intervals.

The structure of the belt 7 is the same as that of embodiment 11, except that the interval between the adjacent string bodies 21 is changed. The method of manufacturing the belt 7 and the structure of the elevator are the same as those in embodiment 1.

Further, by changing the interval between the adjacent rope bodies 21, even when the belt 7 is wound around the drive sheave 5 on which the peak portions 5b are formed, the load sharing of the rope bodies 21 can be equalized.

The intervals between the adjacent string bodies 21 may include 3 or more different intervals from each other.

Further, a plurality of types of string bodies 21 having different cross sections may be combined and arranged in the common band 7, and the interval between the adjacent string bodies 21 may be changed. That is, embodiment 18 and embodiment 19 may be combined.

In embodiments 1 to 19, at least a part of the steel member included in the plurality of strings 21 may be plated. For example, the core member 25 may be plated. Further, the wires constituting the core strand 26, the first outer layer strand 30, the second outer layer strand 34, and the center strand 37 may be plated. This can suppress corrosion of the steel member.

The high-strength fiber bundles obtained by binding a plurality of yarns 50 described in embodiments 12 to 15 can also be applied to the high-strength fiber bundles described in embodiments 1 to 11 and 16 to 19.

In each embodiment, the number of the string bodies 21 is not particularly limited. In each embodiment, the amount of the high-strength fibers, the number of the core members, the number of the strands, and the number of the wires constituting the strands are not particularly limited.

The belt 7 may include a strength member other than the string body 21 shown in embodiments 1 to 19.

The type of elevator is not limited to the type shown in fig. 1, and may be, for example, 2:1 rope winding mode.

The elevator may be a machine room-less elevator, a double-deck elevator, a single-shaft multi-car elevator, or the like. The single-shaft multi-car system is a system in which an upper car and a lower car disposed directly below the upper car are raised and lowered independently in a common shaft.

In embodiments 1 to 19, the belt 7 is used as a suspension body for suspending the car 8 of the elevator. However, the use of the belt 7 is not limited thereto. The belt 7 can also be applied to a speed governor rope or a compensating body of an elevator, for example. The belt 7 may be applied to devices other than an elevator, such as a crane device.

Description of the reference symbols

3: a traction machine; 5: a drive sheave; 7: a belt; 8: a car; 9: counterweight; 11: a compensating body; 21: a rope body; 22: a rope coating; 23: a core rope; 24: a core fiber bundle; 25: a core member; 26: a core strand (core member); 27: a core single wire; 28: a first peripheral fiber layer; 29: a first strand layer; 30: a first outer ply of strands; 31: a first outer layer element wire; 32: a second peripheral fiber layer; 33: a second strand layer; 34: a second outer ply of strands; 35: a second outer layer element wire; 36: a centerline component; 37: a center strand (centerline feature); 38: a central strand wire; 39: a core resin layer; 40: a central fiber core; 41: a strand fiber core; 50: a yarn; 52: a high strength fiber strand; 53: a strand wrap.

Claims

1. A belt, comprising:

a plurality of string bodies arranged at intervals in a width direction when a cross section perpendicular to a length direction is viewed; and

a rope coating body for coating the plurality of rope bodies,

the plurality of rope bodies are respectively provided with a core rope,

each of the core ropes has:

a core fiber bundle comprising 1 or more twisted high-strength fiber bundles; and

a plurality of steel core members disposed on an outer periphery of the core fiber bundle.

2. The belt according to claim 1,

at least 1 of said core members being core strands,

the core strand includes a plurality of steel core strands twisted with each other.

3. The belt according to claim 2,

a strand fiber core consisting of a high strength fiber bundle is disposed in the center of at least 1 of the core strands.

4. The belt according to claim 2 or 3,

the shape of a cross section perpendicular to the longitudinal direction of at least 1 of the core strands is deformed into a circular shape.

5. The belt according to any one of claims 1 to 4,

at least 1 of said ropes having:

a first outer peripheral fiber layer provided on the outer periphery of the core rope and composed of high-strength fiber bundles; and

a first ply of strands disposed at an outer periphery of the first outer peripheral fiber layer,

the first strand layer has a plurality of first outer layer strands,

each of the first outer layer strands includes a plurality of first outer layer element wires made of steel twisted with each other.

6. The belt according to claim 5,

the shape of a cross section perpendicular to the longitudinal direction of at least 1 of the first outer layer strands is profiled to be circular.

7. The belt according to claim 5 or 6,

the at least 1 rope has:

a second peripheral fiber layer which is provided on the periphery of the first strand layer and is composed of high-strength fiber bundles; and

a second strand layer disposed at the periphery of the second peripheral fiber layer,

the second strand layer has a plurality of second outer layer strands,

each of the second outer layer strands includes a plurality of second outer layer element wires made of steel twisted with each other.

8. The belt according to claim 7,

the shape of a cross section perpendicular to the longitudinal direction of at least 1 of the second outer layer strands is profiled to be circular.

9. The belt according to any one of claims 1 to 8,

each of the core ropes further has a steel-made center wire member provided at the center of the core fiber bundle.

10. The belt according to claim 9,

each of said centerline features is a central strand,

each central strand comprises a plurality of steel central strand wires twisted with each other.

11. The belt according to claim 10,

a central fiber core of high strength fiber bundles is disposed in the center of the central strand.

12. The belt according to any one of claims 1 to 11,

each of the core ropes further has a core resin layer interposed between the core fiber bundle and the plurality of core members.

13. The belt according to any one of claims 1 to 12,

the high-strength fiber bundle is formed by bundling a plurality of yarns.

14. The belt according to claim 13,

the plurality of yarns are arranged in parallel to the longitudinal direction of the cord body.

15. The belt according to claim 13,

the plurality of yarns are each twisted.

16. The belt according to any one of claims 1 to 12,

the high strength fiber bundle is composed of a plurality of high strength fiber strands,

each of the high-strength fiber strands is formed by twisting a plurality of yarns.

17. The belt according to claim 16,

there are a plurality of splices in each of the high strength fiber strands that join the yarns adjacent in the length direction of the high strength fiber strands.

18. The belt according to claim 16 or 17,

the outer peripheries of at least 1 of the high-strength fiber strands are covered with a strand covering body made of resin.

19. The belt according to any one of claims 16 to 18,

the shape of a cross section perpendicular to the longitudinal direction of at least 1 of the high-strength fiber strands is deformed into a circular shape.

20. The belt according to any one of claims 13 to 19,

at least 1 of the yarns is formed by resin molding of the yarns.

21. The belt according to claim 20,

a flexible resin is used as the yarn resin,

as the flexible resin, epoxy resin or urethane resin is used.

22. The belt according to claim 20,

an epoxy resin is used as the yarn resin,

the epoxy resin is a solid obtained by mixing a liquid main agent and an admixture and curing the mixture,

the main agent is selected from the group consisting of epoxy compounds and epoxidized polybutadiene,

the molecule of the epoxy compound contains more than 1 bond selected from the group consisting of a polyethylene oxide bond and a urethane bond, and more than 2 epoxy groups,

the epoxidized polybutadiene contains more than 2 epoxy groups in the molecule.

23. The belt according to any one of claims 1 to 22,

as a material of the high-strength fiber bundle, 1 or more kinds of fibers selected from the group consisting of carbon fibers, glass fibers, polyparaphenylene benzobisoxazole fibers, aramid fibers, polyarylate fibers, and basalt fibers are used.

24. The belt according to any one of claims 1 to 23,

the rope coating body is made of an elastic body.

25. The belt according to claim 24,

the rope coating contains a flame retardant.

26. The belt according to any one of claims 1 to 25,

at least a part of the steel member included in the plurality of strings is plated.

27. The belt according to any one of claims 1 to 26,

the plurality of rope bodies comprise more than 2 rope bodies with different sections.

28. The belt according to any one of claims 1 to 27,

the plurality of rope bodies comprise more than 3 rope bodies,

the interval of the adjacent rope bodies comprises various intervals which are different from each other.

29. A method of manufacturing a belt according to any one of claims 1 to 28,

the method for manufacturing the belt comprises the following steps: the rope coating body is continuously coated on the plurality of rope bodies in a state where a uniform tension is applied to the plurality of rope bodies.

30. An elevator, comprising:

a car; and

the tape of any one of claims 1 to 28.

31. The elevator according to claim 30, wherein,

the car is suspended by the belt.

32. The elevator according to claim 31, wherein,

the elevator is also provided with a traction machine with a driving rope wheel,

the 2 or more belts are wound around the outer periphery of the drive sheave at intervals in the axial direction of the drive sheave.

33. The elevator according to claim 32, wherein,

the diameter of the portion of the drive sheave that contacts each of the belts is varied so that the center portion of the belt in the width direction protrudes outward in the radial direction of the drive sheave beyond both ends of the belt in the width direction.

34. The elevator according to claim 32 or 33, wherein,

the diameter of the drive sheave is 40 times or less the maximum diameter of the plurality of rope bodies.

35. The elevator according to any one of claims 32 to 34,

the elevator further comprises:

a counterweight suspended by the belt; and

a compensating body suspended between the car and the counterweight,

the total weight of the compensating body is 1/2 or less of the total weight of all the belts.

36. The elevator according to any one of claims 31 to 35,

the lift stroke of car is more than 75 meters.