Composite stranded wire and method for manufacturing same, rope, belt and elevator

Abstract

The manufacturing method of the composite strand includes a first step, a second step and a third step. The first step is a step of forming a core intermediate body by impregnating an uncured matrix resin into a high-strength fiber bundle. The second step is performed after the first step. In addition, the second step is a step of twisting a plurality of steel peripheral wire components around the periphery of the core intermediate body. The third step is performed after the second step. In addition, the third step is a step of curing the matrix resin so that the core intermediate body becomes a strand core component made of fiber reinforced plastic.

Description

Technical Field

[0001] The present disclosure relates to a composite strand and a method for manufacturing the same, a rope, a belt and an elevator. Background Art

[0002] In the conventional elevator rope, a plurality of steel strands are twisted around the outer circumference of the rope core. The rope core has a load-bearing portion and a sheathing portion made of synthetic fibers. The sheathing portion is sheathed around the outer circumference of the load-bearing portion. The load-bearing portion is composed of a fiber assembly. A flexible resin is impregnated and cured in the load-bearing portion. The load-bearing portion has the following function, that is, when a tensile load is applied to the elevator rope, it shares the load and reduces the load applied to the plurality of steel strands (for example, refer to Patent Document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: International Publication No. 2017 / 138228 Summary of the invention

[0006] Problems to be solved by the invention

[0007] In the conventional elevator rope as described above, a plurality of steel strands are arranged on the outer periphery of a fiber rope core, so there is a concern that the rope core may be damaged due to repeated bending during use, and the strength of the entire rope may be reduced.

[0008] The present disclosure has been made to solve the above-mentioned problems, and an object of the present disclosure is to obtain a composite stranded wire capable of suppressing damage to a stranded wire core member due to repeated bending, a method for producing the same, a rope, a belt, and an elevator.

[0009] Means for solving problems

[0010] The manufacturing method of the composite stranded wire disclosed in the present invention includes: a first step of forming a core intermediate body by impregnating an uncured matrix resin into a high-strength fiber bundle; a second step of twisting a plurality of steel peripheral wire components around the periphery of the core intermediate body after the first step; and a third step of curing the matrix resin after the second step to convert the core intermediate body into a stranded wire core component made of fiber reinforced plastic.

[0011] The composite stranded wire disclosed herein comprises: a stranded wire core component made of fiber reinforced plastic; and a plurality of steel peripheral wire components, which are twisted around the periphery of the stranded wire core component, a plurality of grooves being provided on the peripheral surface of the stranded wire core component, a portion of each peripheral wire component being inserted into a corresponding groove in a cross section perpendicular to the length direction of the stranded wire core component, and an inner surface of each groove being shaped along the shape of the peripheral surface of each peripheral wire component.

[0012] Effects of the Invention

[0013] According to the present disclosure, it is possible to suppress damage to the stranded wire core member due to repeated bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a perspective view showing the elevator according to Embodiment 1.

[0015] Figure 2 yes Figure 1 A cross-sectional view of the suspension body.

[0016] Figure 3 It is enlarged to show Figure 2 Cross-sectional view of a composite stranded conductor.

[0017] Figure 4 Only shows Figure 3 A cross-sectional view of a stranded wire core component.

[0018] Figure 5 Yes Figure 3 A cross-sectional view showing an enlarged portion of a stranded wire core component.

[0019] Figure 6 It is an explanatory diagram showing a first step of the method for producing a composite stranded wire according to the first embodiment.

[0020] Figure 7 It is an explanatory diagram showing the second step of the method for producing the composite stranded wire according to the first embodiment.

[0021] Figure 8 It is an explanatory diagram showing the third step of the method for producing the composite stranded wire according to the first embodiment.

[0022] Fig. 9 It is an explanatory diagram showing a modified example of the third step.

[0023] Fig.10 This is an explanatory diagram showing a modified example in which the first step and the second step are performed continuously.

[0024] Fig.11 It is an explanatory diagram showing a modified example in which the second step and the third step are performed continuously.

[0025] Fig.12 It is an explanatory diagram showing a modified example in which the first step, the second step, and the third step are performed continuously.

[0026] Fig.13 This is a cross-sectional view of a composite stranded wire according to the second embodiment.

[0027] Fig.14 It is shown Fig.13 A cross-sectional view of a modified example of a composite stranded wire.

[0028] Fig.15This is a cross-sectional view of a suspension body according to a third embodiment.

[0029] Fig.16 It is a cross-sectional view of the suspension body of the fourth embodiment.

[0030] Fig.17 It is a cross-sectional view of the suspension body of Embodiment 5.

[0031] Fig.18 This is a cross-sectional view of the suspension body of the sixth embodiment.

[0032] Fig.19 This is a cross-sectional view of a suspension body according to a seventh embodiment.

[0033] Fig. 20 This is a cross-sectional view of a suspension body according to the eighth embodiment.

[0034] Fig.21 This is a cross-sectional view of a suspension body according to a ninth embodiment.

[0035] Fig. 22 This is a cross-sectional view of a suspension body according to a tenth embodiment. DETAILED DESCRIPTION

[0036] Hereinafter, embodiments will be described with reference to the drawings.

[0037] Implementation Method 1

[0038] Figure 1 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. In the machine room 2, a traction machine 3 and a deflector sheave 6 are provided.

[0039] The hoisting machine 3 has a hoisting machine body 4 and a cylindrical driving sheave 5. The hoisting machine body 4 has a hoisting machine motor (not shown) and a hoisting machine brake (not shown). The hoisting machine motor rotates the driving sheave 5. The hoisting machine brake keeps the driving sheave 5 stationary. In addition, the hoisting machine brake brakes the rotation of the driving sheave 5.

[0040] The driving sheave 5 rotates around a horizontal rotation axis. A plurality of suspension bodies 7 are wound around the driving sheave 5 and the deflector wheel 6. Figure 1 In FIG. 1 , only one suspension body 7 is shown. A plurality of suspension bodies 7 are wound around the outer peripheral surface of the driving sheave 5 at intervals in the axial direction of the driving sheave 5.

[0041] The car 8 is connected to the first end in the length direction of each suspension body 7. The counterweight 9 is connected to the second end in the length direction of each suspension body 7. The car 8 and the counterweight 9 are suspended in the hoistway 1 by the suspension body 7. In addition, the car 8 and the counterweight 9 are raised and lowered in the hoistway 1 by rotating the drive sheave 5.

[0042] 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 raising and lowering of the counterweight 9.

[0043] 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 weight balance of the suspension body 7 caused by the movement of the car 8. As the compensating body 11, a flexible rope-like member such as a rope or a chain is used.

[0044] Figure 2 yes Figure 1 The cross-sectional view of the suspension body 7 shows a cross section perpendicular to the length direction of the suspension body 7. The suspension body 7 of the first embodiment is a rope. In addition, the suspension body 7 of the first embodiment is composed only of the rope body 20. The rope body 20 has a core rope 21 and a plurality of composite strands 22 as a plurality of rope strands.

[0045] The core rope 21 is formed as a three-twist rope in which three core rope strands are twisted together. Each core rope strand is formed by bundling a large number of fibers.

[0046] A plurality of composite strands 22 are twisted around the outer periphery of the core rope 21. Figure 2 In the example, eight composite stranded wires 22 are used.

[0047] Figure 3 It is enlarged to show Figure 2 2 is a cross-sectional view of a composite strand 22, showing a cross section perpendicular to the length direction of the composite strand 22. The composite strand 22 has a strand core member 23 made of fiber reinforced plastic and a plurality of steel peripheral wire members 24. The strand core member 23 is continuously arranged over the entire length direction of the composite strand 22.

[0048] A plurality of outer peripheral wire members 24 are twisted around the outer periphery of the stranded wire core member 23. Figure 3 In the embodiment, 14 outer peripheral wire members 24 are used. Each outer peripheral wire member 24 is continuously arranged in the entire length direction of the composite stranded wire 22.

[0049] A single steel wire, that is, a steel wire, is used as each outer peripheral wire member 24. The diameter of each outer peripheral wire member 24 is smaller than the diameter of the strand core member 23. In a cross section perpendicular to the longitudinal direction of the composite strand 22, each outer peripheral wire member 24 has a circular shape.

[0050] In a cross section perpendicular to the length direction of the stranded wire core member 23, the cross-sectional area of ​​the stranded wire core member 23 is preferably larger than the sum of the cross-sectional areas of all the peripheral wire members 24. It is further preferred that in a cross section perpendicular to the length direction of the composite stranded wire 22, the cross-sectional area of ​​the stranded wire core member 23 is greater than or equal to 60% of the cross-sectional area of ​​the composite stranded wire 22 as a whole.

[0051] Figure 4 Only shows Figure 3 The cross-sectional view of the stranded wire core component 23 is from Figure 3 This is a diagram in which all the outer peripheral wire members 24 are removed. A plurality of grooves 23a are provided on the outer peripheral surface of the stranded wire core member 23. The number of the grooves 23a is the same as the number of the outer peripheral wire members 24.

[0052] In the cross section perpendicular to the length direction of the stranded wire core member 23, a portion of each peripheral wire member 24 is inserted into the corresponding groove 23a. In the cross section perpendicular to the length direction of the stranded wire core member 23, the shape of the inner surface of each groove 23a is along the shape of the outer peripheral surface of each peripheral wire member 24.

[0053] Therefore, if Figure 3 As shown, each outer peripheral wire member 24 is partially fitted into the corresponding groove 23a. In addition, each outer peripheral wire member 24 is in surface contact with the inner surface of the corresponding groove 23a as a whole.

[0054] Figure 5 Yes Figure 3 FIG. 2 is a cross-sectional view showing a part of the stranded wire core member 23 in an enlarged manner. The stranded wire core member 23 includes a high-strength fiber bundle 25 and a matrix resin 26. The high-strength fiber bundle 25 is formed by bundling a plurality of high-strength fiber filaments 27. The diameter of each high-strength fiber filament 27 is in the range of several μm to several tens of μm.

[0055] As the material of the high-strength fiber yarn 27, at least one high-strength fiber selected from the group consisting of carbon fiber, polyparaphenylenebenzobisoxazole (PBO) fiber, aramid fiber, polyarylate fiber, polyethylene fiber, glass fiber and basalt fiber is used. In addition, two or more high-strength fibers may be mixed and used.

[0056] As the matrix resin 26, a flexible resin is preferably used to ensure the flexibility of each composite strand 22 and the flexibility of the entire suspension body 7. As the flexible resin, epoxy resin or polyurethane resin is preferably used. These flexible resins will not be destroyed when subjected to external force and can be easily bent.

[0057] The epoxy resin as the matrix resin 26 is a solid obtained by mixing and curing a liquid main agent and a mixed agent. The main agent is selected from the group consisting of epoxy compounds and epoxidized polybutadiene. The molecule of the epoxy compound contains one or more bonds selected from the group consisting of polyoxyalkylene bonds and urethane bonds, and two or more epoxy groups. The molecule of the epoxidized polybutadiene contains two or more epoxy groups.

[0058] When a polyurethane resin is used as the matrix resin 26, an ether polyurethane resin is preferably used from the viewpoint of hydrolysis resistance. Examples of the ether polyurethane resin include resins obtained by curing ether polyols using various polyisocyanate compounds. Examples of the ether polyol include polytetramethylene ether glycol and polypropylene glycol.

[0059] By using such an epoxy resin or polyurethane resin, it is possible to improve the adhesion with the high-strength fiber filaments 27. In addition, it is possible to sufficiently ensure flexibility after curing.

[0060] Next, a description will be given of a method for producing the composite stranded wire 22. The method for producing the composite stranded wire 22 according to the first embodiment includes a first step, a second step, and a third step.

[0061] Figure 6 This is an explanatory diagram showing the first step of the method for producing the composite strand 22 according to Embodiment 1. The first step is a step of forming a core intermediate body 28 in which the high-strength fiber bundle 25 is impregnated with an uncured matrix resin 26 .

[0062] The high-strength fiber bundle 25 is fed from the first feeder 101 and wound up by the first winder 102 as a core intermediate 28. An impregnation tank 103 is provided between the first feeder 101 and the first winder 102. An uncured, i.e., liquid matrix resin 26 is contained in the impregnation tank 103. By passing the high-strength fiber bundle 25 through the impregnation tank 103, the liquid matrix resin 26 is impregnated into the high-strength fiber bundle 25.

[0063] In the first step, a high-strength fiber bundle 25 is used, which is formed by twisting a plurality of high-strength fiber filaments 27. In this case, the cross-sectional shape of the high-strength fiber bundle 25 is not easily deformed, so the cross-sectional shape of the composite strand 22 can also be easily close to a perfect circle. In addition, a soft and easily bendable strand core member 23 can be obtained.

[0064] In the first step, a high-strength fiber bundle 25 in which a plurality of high-strength fiber yarns 27 are bundled without being twisted together may be used. In this case, the strength and elastic modulus of the stranded wire core member 23 in the longitudinal direction can be increased.

[0065] Figure 71 is an explanatory diagram showing the second step of the method for producing the composite stranded wire 22 according to Embodiment 1. The second step is performed after the first step. The second step is a step of twisting a plurality of outer peripheral wire members 24 around the outer periphery of the core intermediate body 28 .

[0066] The core intermediate body 28 is fed from the second feeder 104 and wound by the second winder 105. A twisting device 106 is provided between the second feeder 104 and the second winder 105. The core intermediate body 28 passes through the twisting device 106, and a plurality of outer peripheral wire members 24 are twisted around the outer periphery of the core intermediate body 28.

[0067] The matrix resin 26 in the composite strand 22 wound by the second winder 105 is in an uncured state.

[0068] The second step is performed while tension is applied to the core intermediate body 28. This can improve the tensile strength of the composite strand 22. The tension applied to the core intermediate body 28 is preferably 30% or less of the breaking strength of the high-strength fiber bundle 25. In addition, the tension applied to the core intermediate body 28 is more preferably 5% or more and less than 15% of the breaking strength of the high-strength fiber bundle 25.

[0069] Figure 8 1 is an explanatory diagram showing the third step of the method for producing the composite stranded wire 22 according to Embodiment 1. The third step is performed after the second step. The third step is a step of curing the matrix resin 26 to convert the core intermediate body 28 into the stranded wire core member 23 .

[0070] The composite strand 22 including the uncured matrix resin 26 is fed out from the third feeder 107 and passes through the heating furnace 108. The uncured matrix resin 26 is cured by being heated in the heating furnace 108. The composite strand 22 including the cured matrix resin 26 is wound up by the third winder 109.

[0071] As the heating furnace 108, a high-frequency induction heating furnace is preferably used. That is, the third step preferably includes a high-frequency induction heating step. According to the high-frequency induction heating step, the plurality of peripheral wire components 24 can be heated to a high temperature in a short time. Therefore, heat can be transferred to the core intermediate body 28 in contact with the plurality of peripheral wire components 24 in a short time. Thus, the manufacturing speed of the composite stranded wire 22 can be increased.

[0072] In such a composite stranded wire 22 and its manufacturing method, the suspension body 7 and the elevator, in a cross section perpendicular to the longitudinal direction of the stranded wire core member 23, the shape of the inner surface of each groove 23a is along the shape of the outer peripheral surface of each peripheral wire member 24. Therefore, each peripheral wire member 24 is in surface contact with the stranded wire core member 23, not in point contact.

[0073] Therefore, the contact surface pressure of each outer peripheral wire member 24 with respect to the stranded wire core member 23 is reduced, and it is possible to prevent the stranded wire core member 23 from being scratched. Thus, damage to the stranded wire core member 23 due to repeated bending can be suppressed.

[0074] Furthermore, a plurality of outer peripheral wire members 24 are twisted around the outer periphery of the fiber-reinforced plastic strand core member 23. Therefore, the composite strand 22 can be made lighter and stronger.

[0075] Therefore, the suspension body 7 of the first embodiment can also be applied to elevators having a lifting stroke of 75 meters or more for the car 8. Compared with conventional elevator ropes, the lightweight effect of the suspension body 7 of the first embodiment increases as the lifting stroke of the car 8 increases.

[0076] Furthermore, since the suspension body 7 having high mass-to-strength and high friction coefficient with respect to the drive sheave 5 can be obtained, the mass of the compensating body 11 can be reduced. For example, the mass of the compensating body 11 can be made less than 1 / 2 of the total weight of all the suspension bodies 7. Furthermore, depending on the lifting stroke of the car 8, the compensating body 11 can be completely removed.

[0077] Furthermore, since each strand core member 23 is protected by the plurality of outer peripheral wire members 24, even if the suspension body 7 is repeatedly bent, the strand core members 23 of the adjacent composite stranded wires 22 do not scratch each other.

[0078] Furthermore, scratches caused by repeated bending of the suspension body 7 occur between the outer peripheral wire members 24 disposed on the outer periphery of each composite strand 22. Therefore, the suspension body 7 can be easily maintained by visually checking the breakage of the outer peripheral wire member 24 or detecting it with a dedicated device.

[0079] Furthermore, in a cross section perpendicular to the longitudinal direction of the stranded wire core member 23, the cross-sectional area of ​​the stranded wire core member 23 is larger than the sum of the cross-sectional areas of all the outer peripheral wire members 24. Therefore, a lightweight and high-strength suspension body 7 can be obtained.

[0080] Furthermore, by selecting the above-mentioned high-strength fibers as the material of the high-strength fiber yarns 27 , a lightweight and high-strength composite strand 22 can be obtained.

[0081] In addition, in the method for manufacturing the composite stranded wire 22 of the first embodiment, the uncured matrix resin 26 is impregnated into the high-strength fiber bundle 25 to form the core intermediate body 28, a plurality of outer peripheral wire members 24 are twisted around the outer periphery of the core intermediate body 28, and the matrix resin 26 is cured. Therefore, the shape of the inner surface of each groove 23a can be easily made to follow the outer peripheral surface of each outer peripheral wire member 24.

[0082] Furthermore, since the high-strength fiber bundles 25 are fastened by the plurality of outer peripheral wire members 24 , the packing density of the fibers can be increased.

[0083] In addition, the third step is not performed only once, but may be performed two or more times.

[0084] also, Fig. 9 1 is an explanatory diagram showing a modified example of the third step. In this example, a heat-retaining device 110 is provided downstream of the heating furnace 108, that is, between the heating furnace 108 and the third coiler 109. The heat-retaining device 110 maintains the temperature of the composite strand 22 by heating with warm air. In this way, after the core intermediate body 28 is heated to a desired temperature by the high-frequency induction heating step, the temperature can be maintained by heating with warm air.

[0085] In addition, if Fig.10 As shown, the first step and the second step may also be performed continuously.

[0086] In addition, if Fig.11 As shown, the second step and the third step can also be performed continuously.

[0087] In addition, if Fig.12 As shown, the first step, the second step and the third step may also be performed continuously.

[0088] Implementation Method 2

[0089] then, Fig.13 2 is a cross-sectional view of a composite strand 22 according to Embodiment 2, showing a cross section perpendicular to the length direction of the composite strand 22. In Embodiment 2, a plurality of peripheral strands 31 are twisted around the periphery of a strand core member 23 as a plurality of peripheral wire members. Each peripheral strand 31 includes a plurality of steel wires 32 twisted together.

[0090] In this example, each peripheral strand 31 is composed of seven strands 32. The seven strands 32 include a central strand arranged at the center of the peripheral strand 31 and six peripheral strands twisted around the central strand. The inner surface of each groove 23a is shaped along the outer peripheral surface of each peripheral strand 31.

[0091] The structure and manufacturing method of the composite stranded wire 22 are the same as those of the first embodiment except that a plurality of peripheral stranded wires 31 are used. In addition, the structure of the suspension body 7 and the structure of the elevator are also the same as those of the first embodiment.

[0092] Here, if the outer diameter of the composite strand 22 is increased, the outer diameter of each outer peripheral wire member also becomes larger. If the outer diameter of the outer peripheral wire member 24 of the first embodiment is increased, there is a case where the flexibility decreases. In contrast, the outer peripheral strand 31 of the second embodiment is less likely to decrease in flexibility even if the outer diameter is increased compared to the outer peripheral wire member 24.

[0093] Therefore, according to the composite stranded wire 22 of the second embodiment, the outer diameter of the composite stranded wire 22 can be increased while ensuring flexibility. Thereby, the outer diameter of the suspension body 7 can also be increased.

[0094] In addition, if Fig.14 As shown in FIG. 1 , each peripheral strand 31 may be subjected to compression processing, that is, profile processing, from the periphery. Fig.14 In the embodiment, the cross-section perpendicular to the longitudinal direction of each peripheral strand 31 is shaped into a circular shape. This makes it more difficult for the strand core member 23 to be scratched.

[0095] Furthermore, the profiling process does not necessarily need to be performed on all the peripheral strands 31, and the profiling process may be performed on at least one peripheral strand 31. That is, the peripheral strands 31 that have been profiling-processed and the peripheral strands 31 that have not been profiling-processed may be mixed.

[0096] Furthermore, the outer peripheral wire member 24 of the first embodiment and the outer peripheral stranded wires 31 of the second embodiment may be mixed.

[0097] Implementation 3

[0098] then, Fig.15 This is a cross-sectional view of the suspension body 7 of Embodiment 3, showing a cross section perpendicular to the length direction of the suspension body 7. In Embodiment 3, a composite strand 22 is arranged at the center of the suspension body 7 instead of the core rope 21. Six composite strands 22 are twisted around the outer periphery of the composite strand 22 arranged at the center.

[0099] The structure of the suspension body 7 and the structure of the elevator are the same as those of the first embodiment except that the composite stranded wire 22 is arranged at the center of the suspension body 7. In addition, the method of manufacturing each composite stranded wire 22 is also the same as that of the first embodiment.

[0100] In such a suspension body 7, since the composite strand 22 is also arranged at the center, the suspension body 7 can be further reduced in weight and further increased in strength.

[0101] Implementation 4

[0102] then, Fig.16 2 is a cross-sectional view of the suspension body 7 of the fourth embodiment, showing a cross section perpendicular to the length direction of the suspension body 7. The rope body 20 of the fourth embodiment has a resin strand coating 33 in addition to the structure of the rope body 20 of the third embodiment. The strand coating 33 covers the outer periphery of at least one composite strand 22. In this example, the strand coating 33 covers the outer periphery of the composite strand 22 arranged at the center of the suspension body 7.

[0103] The structure of the suspension body 7 and the structure of the elevator are the same as those of the third embodiment except that the stranded wire coating body 33 is newly provided. In addition, the manufacturing method of each composite stranded wire 22 is the same as that of the first embodiment.

[0104] In such a suspension body 7, the outer periphery of the composite stranded wire 22 arranged at the center of the suspension body 7 is covered by the stranded wire covering body 33. Therefore, each outer peripheral wire component 24 of the composite stranded wire 22 arranged at the center of the suspension body 7 is prevented from contacting with the outer peripheral wire components 24 of other composite stranded wires 22. Thus, damage to each outer peripheral wire component 24 can be suppressed, and the life of the suspension body 7 can be extended.

[0105] In addition, as a material of the strand coating body 33, polyethylene or polypropylene is preferable from the viewpoint of wear resistance and low friction.

[0106] Furthermore, the outer circumferences of two or more composite stranded wires 22 may be respectively covered with the stranded wire covering body 33 .

[0107] Implementation method 5

[0108] then, Fig.17 1 is a cross-sectional view of the suspension body 7 of the fifth embodiment, showing a cross section perpendicular to the longitudinal direction of the suspension body 7. The rope body 20 of the fifth embodiment includes a core rope 30, an intermediate coating body 34 made of resin, and an outer strand layer 35. The structure of the core rope 30 is the same as that of the rope body 20 of the fourth embodiment.

[0109] The intermediate coating body 34 covers the outer circumference of the core rope 30. The material of the intermediate coating body 34 is the same as that of the strand coating body 33.

[0110] The outer stranded wire layer 35 is provided on the outer periphery of the intermediate coating body 34. In addition, the outer stranded wire layer 35 is composed of a plurality of composite stranded wires 22. Fig.17 In the figure, the outer stranded wire layer 35 is composed of 12 composite stranded wires 22. The plurality of composite stranded wires 22 constituting the outer stranded wire layer 35 are twisted around the outer periphery of the intermediate coating 34, respectively.

[0111] In the fifth embodiment, all the composite strands 22 included in the rope body 20 have the same cross-sectional structure. In addition, all the composite strands 22 included in the rope body 20 have the same outer diameter.

[0112] The structure of the suspension body 7 and the structure of the elevator are the same as those of the fourth embodiment except that the intermediate coating body 34 and the outer strand layer 35 are newly added. In addition, the manufacturing method of each composite strand 22 is the same as that of the first embodiment.

[0113] In such a suspension body 7, the plurality of composite strands 22 are arranged in multiple layers. Therefore, the strength of the suspension body 7 can be further improved.

[0114] In addition, in the suspension body 7 of the fifth embodiment, two or more types of composite stranded wires 22 having different cross-sectional structures may be mixed.

[0115] Furthermore, in the suspension body 7 of the fifth embodiment, two or more types of composite stranded wires 22 having outer diameters different from each other may be mixed.

[0116] Implementation 6

[0117] then, Fig.18 : is a cross-sectional view of the suspension body 7 of the sixth embodiment, showing a cross section perpendicular to the length direction of the suspension body 7. In the suspension body 7 of the sixth embodiment, Fig.16 The composite strand 22 at the center of the suspension body 7 of the fourth embodiment shown is replaced by Fig.14 The composite strand 22 is shown.

[0118] The outer diameter of the central composite strand 22 is larger than the outer diameters of the other composite strands 22 .

[0119] The structure of the suspension body 7 and the structure of the elevator are the same as those of the fourth embodiment except for the structure of the composite stranded wire 22 at the center. In addition, the method of manufacturing each composite stranded wire 22 is the same as that of the first embodiment.

[0120] In such a suspension body 7, compared with the fourth embodiment, the outer diameter of the suspension body 7 can be increased without increasing the total number of the composite strands 22.

[0121] Implementation 7

[0122] then, Fig.19 : is a cross-sectional view of the suspension body 7 of the seventh embodiment, showing a cross section perpendicular to the length direction of the suspension body 7. In the suspension body 7 of the seventh embodiment, Fig.17 The plurality of composite strands 22 included in the outer strand layer 35 of the fifth embodiment shown are replaced by Fig.14 The composite strand 22 is shown.

[0123] The structure of the suspension body 7 and the structure of the elevator are the same as those of the fifth embodiment except for the structure of the plurality of composite strands 22 included in the outer strand layer 35. The method of manufacturing each composite strand 22 is the same as that of the first embodiment.

[0124] In this way, two or more types of composite strands 22 having mutually different cross-sectional structures can be used as rope strands, and the degree of freedom in designing the suspension body 7 can be increased.

[0125] In addition, it is also possible to appropriately mix them in one rope. Figure 3 , Fig.13 and Fig.14 The composite strand 22 is shown.

[0126] Implementation 8

[0127] then, Fig. 20 FIG. 2 is a cross-sectional view of the suspension body 7 of the eighth embodiment, showing a cross section perpendicular to the length direction of the suspension body 7. Fig.17 The fifth embodiment shown has, in addition to the rope main body 20, a resin outer layer coating 36. The outer layer coating 36 covers the outer circumference of the rope main body 20 over the entire length direction of the rope main body 20.

[0128] High wear resistance and high friction coefficient are required for the outer layer covering body 36. Therefore, a thermoplastic polyurethane elastomer is preferably used as the material of the outer layer covering body 36. In particular, an ether-based thermoplastic polyurethane elastomer having high hydrolysis resistance is preferably used.

[0129] In addition, the outer layer covering body 36 preferably contains a flame retardant. This ensures the flame retardancy of the suspension body 7.

[0130] The structure of the suspension body 7 and the structure of the elevator are the same as those of the fifth embodiment except that the rope body 20 is covered with the outer layer covering body 36. In addition, the manufacturing method of each composite strand 22 is the same as that of the first embodiment.

[0131] In such a suspension body 7, the outer periphery of the rope body 20 is covered by the outer layer covering body 36. Therefore, the plurality of composite strands 22 included in the outer strand layer 35 are prevented from directly contacting the drive sheave 5. Thus, the wear of the plurality of composite strands 22 included in the outer strand layer 35 can be suppressed. In addition, the wear of the drive sheave 5 can also be suppressed.

[0132] Furthermore, the friction coefficient of the suspension body 7 with respect to the driving sheave 5 can be increased, and the suspension body 7 can be applied to the driving sheave 5 having a smaller diameter.

[0133] In addition, the outer layer coating 36 may be provided on the outer periphery of the rope body 20 shown in Embodiments 1, 3, 4, 6, and 7 or on the outer periphery of the rope body 20 having other cross-sectional structures.

[0134] In the first to eighth embodiments, each outer peripheral wire member 24 and each outer peripheral stranded wire 31 may be plated. This can suppress corrosion of each outer peripheral wire member 24 and each outer peripheral stranded wire 31.

[0135] In addition, in Embodiments 1 and 3 to 8, all the rope strands are the composite strands 22. However, the composite strand 22 may be used as at least one of the plurality of rope strands.

[0136] Implementation method 9

[0137] then, Fig.211 is a cross-sectional view of the suspension body 7 of the ninth embodiment, showing a cross section perpendicular to the longitudinal direction of the suspension body 7. The suspension body 7 of the ninth embodiment is a belt. The suspension body 7 of the ninth embodiment has a plurality of composite strands 22 as a belt wire member and a resin-made belt coating 37.

[0138] When observing the cross section perpendicular to the longitudinal direction of the suspension body 7, the composite strands 22 are arranged in a row at intervals in the width direction of the suspension body 7. Fig.14 The composite stranded wire 22 of the second embodiment shown. Fig.21 In the embodiment, six composite stranded wires 22 are used.

[0139] The tape covering body 37 covers the plurality of composite strands 22 over the entire length direction of the suspension body 7. A thermoplastic polyurethane elastomer is preferably used as the material of the tape covering body 37. In particular, an ether-based thermoplastic polyurethane elastomer having high hydrolysis resistance is preferably used.

[0140] In addition, it is preferable that the belt covering body 37 contains a flame retardant. Thereby, the flame retardancy of the suspension body 7 can be ensured.

[0141] The structure of the elevator is the same as that of the first embodiment except that the suspension body 7 is a belt. In addition, the manufacturing method of each composite strand 22 is also the same as that of the first embodiment.

[0142] Such a suspension body 7 can be applied to a driving sheave 5 having a smaller diameter while ensuring equivalent strength compared to a case where a rope is used as the suspension body 7 .

[0143] In the ninth embodiment, all the strip line members are the composite stranded wires 22. However, the composite stranded wire 22 may be used as at least one of the plurality of strip line members.

[0144] In addition, two or more types of composite stranded wires 22 having at least one different cross-sectional structure and outer diameter may be mixed appropriately in one tape. Figure 3 , Fig.13 and Fig.14 The composite strand 22 is shown.

[0145] Furthermore, the intervals between adjacent composite strands 22 may include three or more different intervals.

[0146] Embodiment 10

[0147] then, Fig. 22 1 is a cross-sectional view of the suspension body 7 according to the tenth embodiment, and shows a cross section perpendicular to the longitudinal direction of the suspension body 7. The suspension body 7 according to the tenth embodiment is a belt. The suspension body 7 according to the tenth embodiment has a plurality of ropes and a belt covering body 37 as a belt line member.

[0148] Each rope is Fig.17 The rope main body 20 of the fifth embodiment shown in the figure is configured. When the cross section of the suspension body 7 perpendicular to the longitudinal direction is viewed, a plurality of rope main bodies 20 are arranged in a row at intervals in the width direction of the suspension body 7. Fig. 22 In the embodiment, six rope bodies 20 are used.

[0149] The belt covering body 37 covers the plurality of rope main bodies 20 over the entire length direction of the suspension body 7 .

[0150] The structure of the elevator is the same as that of the first embodiment except that the suspension body 7 is a belt. In addition, the manufacturing method of each composite strand 22 is also the same as that of the first embodiment.

[0151] Such a suspension body 7 can be applied to a driving sheave 5 having a smaller diameter while ensuring equivalent strength compared to a case where a rope is used as the suspension body 7 .

[0152] Furthermore, compared with the case where the composite stranded wire 22 is used as each strip wire member, the strength of the suspension body 7 can be improved.

[0153] In Embodiment 10, all the tape wire members are ropes. However, a rope including the composite stranded wire 22 may be used as at least one of the plurality of tape wire members.

[0154] Furthermore, two or more types of ropes having at least one of a cross-sectional structure and an outer diameter different from each other may be mixed appropriately in one belt.

[0155] Furthermore, the intervals between adjacent ropes may include three or more different intervals.

[0156] In addition, the type of elevator is not limited to Figure 1 Type, for example, can also be a 2:1 roping method.

[0157] 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 just below the upper car are independently raised and lowered in a common shaft.

[0158] In Embodiments 1 to 10, ropes or belts are used as the suspension body 7 for suspending the car 8. However, the use of ropes and belts is not limited thereto. For example, ropes and belts can also be applied to speed governor ropes or compensating bodies of elevators. In addition, ropes and belts can also be applied to devices other than elevators, such as lifting devices.

[0159] Description of symbols

[0160] 3: traction machine; 5: driving sheave; 7: suspension body (rope, belt); 8: car; 9: counterweight; 11: compensating body; 20: rope body (belt wire component); 22: composite stranded wire (rope stranded wire, belt wire component); 23: stranded wire core component; 23a: groove; 24: peripheral wire component; 25: high-strength fiber bundle; 26: matrix resin; 27: high-strength fiber filament; 28: core intermediate; 31: peripheral stranded wire (peripheral wire component); 32: single wire; 33: stranded wire coating; 36: outer layer coating; 37: belt coating.

Claims

1. A method for manufacturing a composite stranded wire, comprising: In a first step, a core intermediate is formed by impregnating a high-strength fiber bundle formed by bundling a plurality of high-strength fiber yarns with an uncured matrix resin; A second step, after the first step, twisting a plurality of steel peripheral wire members around the outer periphery of the core intermediate body; as well as A third step is to cure the matrix resin to form a fiber reinforced plastic strand core member as the core intermediate after the second step. As a material of the plurality of high-strength fiber yarns, at least one high-strength fiber selected from the group consisting of carbon fiber, polyparaphenylene benzobisoxazole fiber, aramid fiber, polyarylate fiber, polyethylene fiber, glass fiber and basalt fiber is used, In the first step, the matrix resin is allowed to enter between the plurality of high-strength fiber filaments. The third step includes a high-frequency induction heating step.

2. The method for manufacturing a composite stranded wire according to claim 1, wherein: In the first step, the high-strength fiber bundle formed by twisting a plurality of high-strength fiber yarns is used.

3. The method for manufacturing a composite stranded wire according to claim 1, wherein: In the first step, the high-strength fiber bundle is used, which is a bundle of a plurality of high-strength fiber yarns that are not twisted together.

4. The method for manufacturing a composite stranded wire according to any one of claims 1 to 3, wherein: The second step is performed while tension is applied to the core intermediate body.

5. A composite stranded wire comprising: Stranded wire core components made of fiber-reinforced plastic; and A plurality of steel peripheral wire components, which are twisted around the outer periphery of the stranded wire core component, A plurality of grooves are provided on the outer peripheral surface of the stranded wire core component. In a cross section perpendicular to the length direction of the stranded wire core member, A portion of each of the outer peripheral wire members is inserted into the corresponding groove, The shape of the inner surface of each groove is along the shape of the outer peripheral surface of each outer peripheral line member. The stranded wire core component comprises a plurality of high-strength fiber filaments and a matrix resin composed of a flexible resin. As a material of the plurality of high-strength fiber yarns, at least one high-strength fiber selected from the group consisting of carbon fiber, polyparaphenylene benzobisoxazole fiber, aramid fiber, polyarylate fiber, polyethylene fiber, glass fiber and basalt fiber is used, The matrix resin enters between the plurality of high-strength fiber filaments, As the flexible resin, epoxy resin or polyurethane resin is used.

6. The composite stranded wire according to claim 5, wherein: In a cross section perpendicular to the length direction of the stranded wire core member, The cross-sectional area of ​​the stranded wire core member is larger than the sum of the cross-sectional areas of all the outer peripheral wire members.

7. The composite stranded wire according to claim 5, wherein: At least one of the peripheral wire components is a peripheral stranded wire, The peripheral stranded wire includes a plurality of steel wires twisted together.

8. The composite stranded wire according to claim 7, wherein: The cross-section of at least one of the outer peripheral strands is shaped to be circular in a perpendicular direction to the longitudinal direction.

9. The composite stranded wire according to any one of claims 5 to 8, wherein: Each of the outer peripheral wire members is plated.

10. A composite stranded wire comprising: Stranded core components made of fiber-reinforced plastic; and A plurality of steel peripheral wire components, which are twisted around the outer periphery of the stranded wire core component, A plurality of grooves are provided on the outer peripheral surface of the stranded wire core component. In a cross section perpendicular to the length direction of the stranded wire core member, A portion of each of the outer peripheral wire members is inserted into the corresponding groove, The shape of the inner surface of each groove is along the shape of the outer peripheral surface of each outer peripheral line member. The stranded wire core component comprises a plurality of high-strength fiber filaments and a matrix resin composed of a flexible resin. As a material of the plurality of high-strength fiber yarns, at least one high-strength fiber selected from the group consisting of carbon fiber, polyparaphenylene benzobisoxazole fiber, aramid fiber, polyarylate fiber, polyethylene fiber, glass fiber and basalt fiber is used, The matrix resin enters between the plurality of high-strength fiber filaments, As the flexible resin, epoxy resin is used. The epoxy resin is a solid formed by mixing and curing a liquid main agent and a mixing agent. The main agent is selected from the group consisting of epoxy compounds and epoxidized polybutadiene, The molecule of the epoxy compound includes one or more bonds selected from the group consisting of polyoxyalkylene bonds and urethane bonds, and two or more epoxy groups. The epoxidized polybutadiene molecule contains two or more epoxy groups.

11. The composite stranded wire according to claim 10, wherein: In a cross section perpendicular to the length direction of the stranded wire core member, The cross-sectional area of ​​the stranded wire core member is larger than the sum of the cross-sectional areas of all the outer peripheral wire members.

12. The composite stranded wire according to claim 10, wherein: At least one of the peripheral wire components is a peripheral stranded wire, The peripheral stranded wire includes a plurality of steel wires twisted together.

13. The composite stranded wire according to claim 12, wherein: The cross-section of at least one of the outer peripheral strands is shaped to be circular in a perpendicular direction to the longitudinal direction.

14. The composite stranded wire according to any one of claims 10 to 13, wherein: Each of the outer peripheral wire members is plated.

15. A rope comprising a rope body having a plurality of rope strands, As at least one of the plurality of rope strands, the composite strand according to any one of claims 5 to 14 is used.

16. The rope according to claim 15, wherein The rope body further includes a strand coating body made of resin that covers the outer circumference of at least one of the composite strands.

17. The rope according to claim 15, wherein Two or more types of the composite strands having mutually different cross-sectional structures are used as the rope strands.

18. The rope according to claim 16, wherein Two or more types of the composite strands having mutually different cross-sectional structures are used as the rope strands.

19. The rope according to any one of claims 15 to 18, wherein The rope further includes an outer layer covering body made of resin covering an outer periphery of the rope main body.

20. The rope according to claim 19, wherein The outer layer covering contains a flame retardant.

21. A belt comprising: a plurality of strip line members, the plurality of strip line members being arranged at intervals from each other in the width direction when a cross section perpendicular to the length direction is observed; and a resin tape coating body covering the plurality of tape line components, As at least one of the plurality of strip wire members, the composite stranded wire according to any one of claims 5 to 14 is used.

22. A belt comprising: a plurality of strip line members, the plurality of strip line members being arranged at intervals from each other in the width direction when a cross section perpendicular to the length direction is observed; and a resin tape coating body covering the plurality of tape line components, As at least one of the plurality of belt wire members, the rope according to any one of claims 15 to 20 is used.

23. A belt according to claim 21 or 22, wherein The tape cover contains a flame retardant.

24. An elevator comprising the rope according to any one of claims 15 to 20.

25. An elevator comprising the belt according to any one of claims 21 to 23.

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