KR20230073278A - Composite strand, manufacturing method therefor, rope, belt, and elevator - Google Patents

Abstract

The manufacturing method of a composite strand includes a 1st process, a 2nd process, and a 3rd process. The first step is a step of forming a core intermediate body formed by impregnating a high-strength fiber bundle with an uncured matrix resin. A 2nd process is implemented after a 1st process. Moreover, a 2nd process is a process of twisting several steel outer circumferential wire members mutually around the outer periphery of a core intermediate body. A 3rd process is implemented after a 2nd process. Moreover, the 3rd process is a process of making a core intermediate body into a fiber-reinforced plastics strand core member by hardening a matrix resin.

Description

Composite strand, manufacturing method therefor, rope, belt, and elevator

The present disclosure relates to composite strands, methods of manufacturing the same, ropes, belts, and elevators.

In a conventional elevator rope, a plurality of steel strands are twisted around the outer periphery of a rope core. The rope core has a load bearing portion and a coating portion made of synthetic fibers. The coating portion is covered on the outer periphery of the load bearing portion. The load bearing portion is constituted by a fiber aggregate. The load bearing portion is impregnated with a flexible resin and cured. The load bearing portion has a role of alleviating the load applied to a plurality of steel strands by sharing the load when a tensile load is applied to the elevator rope (see Patent Document 1, for example).

Patent Document 1: International Publication No. 2017/138228

In the conventional elevator rope as described above, a plurality of steel strands are arranged on the outer circumference of the fiber rope core. For this reason, there is a fear that the rope core may be damaged due to repeated bending during use, and the strength of the entire rope may decrease.

The present disclosure has been made to solve the above problems, and aims to obtain a composite strand capable of suppressing damage to a strand core member due to repeated bending, a manufacturing method thereof, a rope, a belt, and an elevator.

In the method for producing a composite strand according to the present disclosure, a first step of forming a core intermediate body formed by impregnating a high-strength fiber bundle with an uncured matrix resin, and a plurality of steels on the outer circumference of the core intermediate body after the first step The 3rd process of making a core intermediate body into a fiber-reinforced plastics strand core member by hardening a matrix resin after the 2nd process of twisting the outer circumferential wire member of this, and the 2nd process.

A composite strand according to the present disclosure includes a fiber-reinforced plastic strand core member and a plurality of steel outer circumferential wire members twisted around the outer circumference of the strand core member, and a plurality of grooves are formed on the outer circumferential surface of the strand core member Provided, in the cross section perpendicular to the longitudinal direction of the strand core member, a part of each outer circumference line member is inserted into a corresponding groove, and the shape of the inner surface of each groove is a shape along the outer circumferential surface of each outer circumference line member .

According to the present disclosure, damage to the strand core member due to repeated bending can be suppressed.

1 is a perspective view showing an elevator according to Embodiment 1;
Figure 2 is a cross-sectional view of the suspension of Figure 1;
Figure 3 is a cross-sectional view showing an enlarged composite strand of Figure 2.
Figure 4 is a cross-sectional view showing only the strand core member of Figure 3;
5 is a cross-sectional view showing a part of the strand core member of FIG. 3 in an enlarged manner.
6 is an explanatory view showing the first step of the manufacturing method of the composite strand according to Embodiment 1;
7 is an explanatory view showing a second step of the manufacturing method of the composite strand according to Embodiment 1;
8 : is explanatory drawing which shows the 3rd process of the manufacturing method of the composite strand by Embodiment 1.
9 is an explanatory diagram showing a modified example of a third step.
10 is an explanatory view showing a modified example in which a first step and a second step are continuously performed.
11 is an explanatory view showing a modified example in which a second step and a third step are continuously performed.
12 is an explanatory view showing a modified example in which a first step, a second step, and a third step are continuously performed.
13 is a cross-sectional view of a composite strand according to Embodiment 2.
Figure 14 is a cross-sectional view showing a modified example of the composite strand of Figure 13;
Fig. 15 is a cross-sectional view of a suspension body according to Embodiment 3;
Fig. 16 is a cross-sectional view of a suspension body according to Embodiment 4;
Fig. 17 is a sectional view of a suspension body according to the fifth embodiment.
Fig. 18 is a cross-sectional view of a suspension according to Embodiment 6;
Fig. 19 is a sectional view of a suspension according to Embodiment 7;
Fig. 20 is a sectional view of a suspension body according to Embodiment 8;
Fig. 21 is a cross-sectional view of a suspension body according to a ninth embodiment.
Fig. 22 is a cross-sectional view of a suspension according to Embodiment 10;

EMBODIMENT OF THE INVENTION Hereinafter, embodiment is described with reference to drawings.

Embodiment 1.

1 is a perspective view showing an elevator according to Embodiment 1; In the drawing, a machine room 2 is provided above the hoistway 1 . In the machine room 2, a hoisting machine 3 and a deflector wheel 6 are installed.

The hoisting machine 3 has a hoisting machine main body 4 and a cylindrical drive sheave 5. The traction machine main body 4 has a traction machine motor (not shown) and a traction machine brake (not shown). The winding machine motor rotates the drive sheave 5. The traction machine brake maintains the stop state of the drive sheave (5). Also, the winding machine brake brakes the rotation of the drive sheave 5.

The drive sheave 5 rotates about a horizontal axis of rotation. A plurality of suspension bodies 7 are wound around the drive sheave 5 and the deflector wheel 6 . However, in FIG. 1, only one suspension body 7 is shown. A plurality of suspension bodies 7 are wound around the outer circumferential surface of the drive sheave 5 at intervals from each other in the axial direction of the drive sheave 5 .

The car 8 is connected to the first end of each suspension body 7 in the longitudinal direction. The balance weight 9 is connected to the second end of each suspension body 7 in the longitudinal direction. The car 8 and the counterweight 9 are suspended in the hoistway 1 by the suspension body 7. Further, the car 8 and the counterweight 9 move up and down in the hoistway 1 by rotating the drive sheave 5 .

In the hoistway 1, 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. The first car guide rail 10a and the second car guide rail 10b guide the ascending and descending of the car 8 . The first counterweight guide rail and the second counterweight guide rail guide the elevation of the counterweight 9 .

Between the lower part of the car 8 and the lower part of the counterweight 9, a compensating body 11 is suspended. The compensating body 11 compensates for the influence of a change in the weight balance of the suspension body 7 caused by the movement of the car 8 . As the compensating body 11, a cord-like member having flexibility, for example, a rope or chain is used.

FIG. 2 is a cross-sectional view of the suspension body 7 of FIG. 1, and shows a cross section perpendicular to the longitudinal direction of the suspension body 7. As shown in FIG. The suspension 7 of Embodiment 1 is a rope. Moreover, the suspension body 7 of Embodiment 1 is comprised only of the rope main body 20. The rope main body 20 has a core steel 21 and a plurality of composite strands 22 as a plurality of rope strands.

The core steel 21 is configured as three twisted ropes formed by twisting three core steel strands together. Each core steel strand is constituted by bundling a large number of fibers.

A plurality of composite strands 22 are mutually twisted around the outer periphery of the core cavity 21 . In the example of FIG. 2, 8 composite strands 22 are used.

FIG. 3 is an enlarged cross-sectional view of the composite strand 22 of FIG. 2 , showing a cross section perpendicular to the longitudinal 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 outer circumferential wire members 24. The strand core member 23 is continuously arranged over the entire longitudinal direction of the composite strand 22 .

A plurality of outer circumferential wire members 24 are twisted around the outer periphery of the strand core member 23 with each other. In Fig. 3, 14 outer peripheral line members 24 are used. Each outer circumferential line member 24 is continuously arranged over the entire longitudinal direction of the composite strand 22 .

As each outer circumferential wire member 24, one steel wire, that is, a steel wire, is used. The diameter of each outer circumference line 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 line member 24 has a circular shape.

In a cross section perpendicular to the longitudinal direction of the strand core member 23, the cross sectional area of the strand core member 23 is preferably larger than the sum of the cross sectional areas of all the outer peripheral line members 24. More preferably, in the cross section perpendicular to the longitudinal direction of the composite strand 22, the cross-sectional area of the strand core member 23 is 60% or more of the cross-sectional area of the entire composite strand 22.

FIG. 4 is a cross-sectional view showing only the strand core member 23 of FIG. 3 , and is a view in which all of the outer peripheral line members 24 are removed in FIG. 3 . The outer peripheral surface of the strand core member 23 is provided with a plurality of grooves 23a. The number of grooves 23a is the same as the number of outer peripheral line members 24 .

In the cross section perpendicular to the longitudinal direction of the strand core member 23, a part of each outer peripheral line member 24 is inserted into the corresponding groove 23a. In a cross section perpendicular to the longitudinal direction of the strand core member 23, the shape of the inner surface of each groove 23a is the shape along the outer peripheral surface of each outer peripheral line member 24.

For this reason, each outer circumferential line member 24 is partially fitted into the corresponding groove 23a, as shown in FIG. 3 . Moreover, each outer circumferential line member 24 is in surface contact with the entire inner surface of the corresponding groove 23a.

Fig. 5 is a cross-sectional view showing a part of the strand core member 23 of Fig. 3 on an enlarged scale. The strand core member 23 has a high-strength fiber bundle 25 and a matrix resin 26. The high-strength fiber bundle 25 is configured 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 micrometers to several tens of micrometers.

As the material of the high-strength fiber filament 27, from the group consisting of carbon fiber, polyparaphenylene benzoxazole (PBO) fiber, aramid fiber, polyarylate fiber, polyethylene fiber, glass fiber, and basalt fiber. At least one selected high-strength fiber is used. In addition, two or more types of high-strength fibers may be mixed and used.

As the matrix resin 26, in order to ensure the flexibility of each composite strand 22 and the flexibility of the suspension body 7 as a whole, it is preferable to use a flexible resin. As the flexible resin, an epoxy resin or a urethane resin is preferably used. These flexible resins can be easily bent without breaking when subjected to an external force.

The epoxy resin as the matrix resin 26 is a solid cured by mixing a liquid main agent with a mixture agent. The main agent is selected from the group consisting of epoxy compounds and epoxidized polybutadiene. The molecule of the epoxy compound contains at least one selected from the group consisting of a polyoxyalkylene bond and a urethane bond, and two or more epoxy groups. The molecule of epoxidized polybutadiene contains two or more epoxy groups.

When using a urethane resin as the matrix resin 26, it is preferable to use an ether-based urethane resin from the viewpoint of hydrolysis resistance. Examples of the ether-based urethane resin include those obtained by curing ether-based polyols with various polyisocyanate compounds. As the ether polyol, polytetramethylene ether glycol, polypropylene glycol and the like are used.

By using such an epoxy resin or urethane resin, adhesion to the high-strength fiber filaments 27 can be improved. Moreover, flexibility after hardening is fully securable.

Next, the manufacturing method of the composite strand 22 is demonstrated. The manufacturing method of the composite strand 22 by Embodiment 1 includes the 1st process, the 2nd process, and the 3rd process.

6 : is explanatory drawing which shows the 1st process of the manufacturing method of the composite strand 22 by Embodiment 1. The first step is a step of forming the core intermediate body 28 formed by impregnating the high-strength fiber bundle 25 with the uncured matrix resin 26.

The high-strength fiber bundle 25 is sent out from the first delivery machine 101 and wound around the first winder 102 as a core intermediate body 28. An impregnation tank 103 is provided between the first delivery machine 101 and the first winder 102. In the impregnation tank 103, an uncured state, that is, a liquid matrix resin 26 is accommodated. By passing the high-strength fiber bundles 25 through the impregnation tank 103, the high-strength fiber bundles 25 are impregnated with the liquid matrix resin 26.

In the first step, a high-strength fiber bundle 25 obtained by twisting a plurality of high-strength fiber filaments 27 is used. In this case, since the cross-sectional shape of the high-strength fiber bundle 25 is difficult to collapse, the cross-sectional shape of the composite strand 22 can also be easily made close to a perfect circle. In addition, a flexible and bendable strand core member 23 can be obtained.

Further, in the first step, a high-strength fiber bundle 25 obtained by bundling a plurality of high-strength fiber filaments 27 without twisting them may be used. In this case, the strength and elastic modulus of the strand core member 23 in the longitudinal direction can be increased.

7 : is explanatory drawing which shows the 2nd process of the manufacturing method of the composite strand 22 by Embodiment 1. A 2nd process is implemented after a 1st process. Moreover, the 2nd process is a process of twisting the some outer circumferential wire member 24 to the outer periphery of the core intermediate body 28 mutually.

The core intermediate body 28 is delivered from the second delivery machine 104 and is wound around the second winding machine 105 . Between the 2nd delivery machine 104 and the 2nd winding machine 105, the twisting|twisting device 106 is provided. By passing the core intermediate body 28 through the twisting device 106, a plurality of outer peripheral wire members 24 are twisted with each other around the outer periphery of the core intermediate body 28.

The matrix resin 26 in the composite strand 22 wound by the second winding machine 105 is in an uncured state.

The second step is performed while applying tension to the core intermediate body 28. Thereby, the tensile strength of the composite strand 22 can be improved. 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. Further, 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.

8 : is explanatory drawing which shows the 3rd process of the manufacturing method of the composite strand 22 by Embodiment 1. A 3rd process is implemented after a 2nd process. Moreover, the 3rd process is a process of making the core intermediate body 28 into the strand core member 23 by hardening the matrix resin 26.

The composite strand 22 containing the uncured matrix resin 26 is sent out from the third delivery machine 107 and passed through the heating furnace 108 . The uncured matrix resin 26 is cured by being heated in the heating furnace 108 . The composite strand 22 containing the matrix resin 26 after hardening is wound around the third winding machine 109 .

As the heating furnace 108, it is preferable to use a high-frequency induction heating furnace. That is, it is preferable that the 3rd process includes a high-frequency induction heating process. According to the high-frequency induction heating process, the plurality of outer peripheral wire members 24 can be heated to a high temperature in a short time. For this reason, heat can be transmitted to the core intermediate body 28 in contact with the plurality of outer peripheral line members 24 in a short time. Thereby, the manufacturing speed of the composite strand 22 can be increased.

In such a composite strand 22, its manufacturing method, suspension body 7, and elevator, in the cross section perpendicular to the longitudinal direction of the strand core member 23, the shape of the inner surface of each groove 23a is each outer circumference It is a shape along the outer circumferential surface of the wire member 24 . For this reason, each outer circumference line member 24 is not in point contact with respect to the strand core member 23, but is in surface contact.

Therefore, the contact surface pressure of each outer circumferential member 24 to the strand core member 23 becomes low, and it is possible to make the strand core member 23 less likely to be scratched. Thereby, damage to the strand core member 23 due to repeated bending can be suppressed.

Further, around the outer periphery of the fiber-reinforced plastic strand core member 23, a plurality of outer circumferential wire members 24 are twisted with each other. For this reason, while lightening the weight of the composite strand 22, it can increase strength.

For this reason, the suspension body 7 of Embodiment 1 can also be applied to an elevator in which the car 8 has a travel of 75 meters or longer. Compared with conventional elevator ropes, the effect of weight reduction by the suspension body 7 of Embodiment 1 is greater as the lifting and lowering stroke of the car 8 increases.

In addition, since the suspension body 7 having a high mass ratio strength and a high friction coefficient with respect to 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 1/2 or less of the total weight of all the suspension bodies 7. Further, depending on the ascending/lowering stroke of the car 8, the compensating body 11 may be completely removed.

In addition, since each strand core member 23 is protected by a plurality of outer peripheral line members 24, even if the suspension body 7 is repeatedly bent, the strand core member 23 of the composite strands 22 adjacent to each other ) does not cause abrasion between them.

In addition, abrasion due to repeated bending of the suspension body 7 occurs between the outer peripheral line members 24 arranged on the outer periphery of each composite strand 22 . For this reason, it is possible to easily perform maintenance of the suspension body 7 by a method of visually confirming breakage of the outer peripheral line member 24 or detecting it with a dedicated device.

Further, in a cross section perpendicular to the longitudinal direction of the strand core member 23, the cross sectional area of the strand core member 23 is larger than the sum of the cross sectional areas of all the outer peripheral line members 24. For this reason, it is possible to obtain a lightweight and high-strength suspension 7.

In addition, by selecting the high-strength fiber as described above as the material of the high-strength fiber filament 27, a lightweight and high-strength composite strand 22 can be obtained.

In addition, in the manufacturing method of the composite strand 22 of Embodiment 1, the core intermediate body 28 is formed by impregnating the high-strength fiber bundle 25 with the uncured matrix resin 26, and the outer periphery of the core intermediate body 28 A plurality of outer peripheral wire members 24 are twisted with each other, and the matrix resin 26 is cured. For this reason, the shape of the inner surface of each groove|channel 23a can be easily made into the shape along the outer peripheral surface of each outer circumferential line member 24.

In addition, since the high-strength fiber bundle 25 is tightly clamped by the plurality of outer peripheral wire members 24, the fiber packing density can be increased.

In addition, you may implement a 3rd process not only once but twice or more.

Moreover, FIG. 9 is explanatory drawing which shows the modified example of a 3rd process. In this example, the thermal insulation device 110 is provided downstream of the heating furnace 108, that is, between the heating furnace 108 and the third winder 109. The thermal insulation device 110 maintains the temperature of the composite strand 22 by heating with warm air. In this way, after heating the core intermediate body 28 to a desired temperature by the high-frequency induction heating step, the temperature may be maintained by heating with warm air.

Moreover, as shown in FIG. 10, the 1st process and the 2nd process may be performed continuously.

Moreover, as shown in FIG. 11, the 2nd process and the 3rd process may be performed continuously.

Moreover, as shown in FIG. 12, the 1st process, the 2nd process, and the 3rd process may be performed continuously.

Embodiment 2.

Next, FIG. 13 is a cross-sectional view of the composite strand 22 according to Embodiment 2, showing a cross section perpendicular to the longitudinal direction of the composite strand 22 . In the second embodiment, a plurality of outer circumferential strands 31 are twisted around the outer periphery of the strand core member 23 as a plurality of outer circumferential wire members. Each outer circumferential strand 31 includes a plurality of steel strands 32 twisted with each other.

In this example, each outer circumferential strand 31 is constituted by seven strands 32 . The seven strands 32 include a center strand disposed at the center of the outer strand 31 and six outer strands twisted around the outer periphery of the center strand. The shape of the inner surface of each groove 23a is a shape along the outer circumferential surface of each outer circumferential strand 31 .

Except having used the some outer circumferential strand 31, the structure and manufacturing method of the composite strand 22 are the same as Embodiment 1. In addition, the configuration of the suspension body 7 and the configuration of the elevator are also the same as in the first embodiment.

Here, when the outer diameter of the composite strand 22 is increased, the outer diameter of each outer circumference line member is also increased. When the outer diameter of the outer peripheral line member 24 of Embodiment 1 is increased, the flexibility may decrease. On the other hand, the outer circumferential strand 31 of Embodiment 2 is less flexible than the outer circumferential wire member 24 even if the outer diameter is increased.

For this reason, according to the composite strand 22 of Embodiment 2, the outer diameter of the composite strand 22 can be enlarged, ensuring flexibility. Thereby, the outer diameter of the suspension body 7 can also be enlarged.

Moreover, as shown in FIG. 14, compression processing from the outer periphery, ie, release processing, may be given to each outer circumferential strand 31. In FIG. 14, the shape of the cross section perpendicular to the longitudinal direction of each outer circumferential strand 31 is deformed and becomes circular. Thereby, abrasion of the strand core member 23 can be made more difficult to occur.

In addition, the mold release process may not necessarily be given to all the outer circumferential strands 31, and the mold release process may be given to at least one outer circumferential strand 31. That is, the outer circumference strand 31 on which the release process is performed and the outer circumference strand 31 on which the release process is not performed may be mixed.

In addition, the outer circumferential wire member 24 of Embodiment 1 and the outer circumferential strand 31 of Embodiment 2 may be mixed.

Embodiment 3.

Next, FIG. 15 is a cross-sectional view of the suspension body 7 according to Embodiment 3, showing a cross section perpendicular to the longitudinal direction of the suspension body 7. In Embodiment 3, instead of the core cavity 21, the composite strand 22 is arranged in the center of the suspension body 7. On the outer periphery of the centrally disposed composite strand 22, six composite strands 22 are twisted with each other.

Except that the composite strand 22 is arranged at the center of the suspension 7, the structure of the suspension 7 and the structure of the elevator are the same as in the first embodiment. Moreover, the manufacturing method of each composite strand 22 is also the same as Embodiment 1.

In such a suspension 7, since the composite strand 22 is also arranged in the center, the weight of the suspension 7 can be further reduced, and the suspension 7 can be further strengthened.

Embodiment 4.

Next, FIG. 16 is a cross-sectional view of the suspension body 7 according to the fourth embodiment, showing a cross section perpendicular to the longitudinal direction of the suspension body 7. The rope main body 20 of Embodiment 4 has a resin strand cover 33 in addition to the structure of the rope main body 20 of Embodiment 3. The strand cover body 33 covers the outer periphery of at least one composite strand 22 . In this example, the strand covering body 33 covers the outer periphery of the composite strand 22 arranged in the center of the suspension body 7 .

Except for the addition of the strand covering body 33, the configuration of the suspension body 7 and the configuration of the elevator are the same as in the third embodiment. In addition, the manufacturing method of each composite strand 22 is the same as that of Embodiment 1.

In such a suspension body 7, the outer periphery of the composite strand 22 disposed in the center of the suspension body 7 is covered by the strand cover body 33. For this reason, each outer circumference line member 24 of the composite strand 22 arranged in the center of the suspension body 7 is prevented from contacting the outer circumference line member 24 of the other composite strand 22 . In this way, damage to each outer circumferential line member 24 is suppressed, and the life of the suspension body 7 can be extended.

Moreover, as a material of the strand covering body 33, polyethylene or polypropylene is preferable from the point of abrasion resistance and low friction property.

In addition, the outer periphery of the two or more composite strands 22 may be covered with the strand cover 33, respectively.

Embodiment 5.

Next, FIG. 17 is a cross-sectional view of the suspension body 7 according to the fifth embodiment, showing a cross section perpendicular to the longitudinal direction of the suspension body 7. The rope main body 20 of Embodiment 5 has a core steel 30, a resin intermediate coating body 34, and an outer strand layer 35. The configuration of the core steel 30 is the same as that of the rope main body 20 in the fourth embodiment.

The intermediate covering body 34 covers the outer periphery of the core cavity 30 . The material of the intermediate covering body 34 is the same as that of the strand covering body 33.

The outer strand layer 35 is provided on the outer periphery of the intermediate covering body 34 . In addition, the outer strand layer 35 is constituted by a plurality of composite strands 22 . In FIG. 17 , the outer strand layer 35 is constituted by 12 composite strands 22 . A plurality of composite strands 22 constituting the outer strand layer 35 are mutually twisted around the outer periphery of the intermediate covering body 34, respectively.

In Embodiment 5, the cross-sectional structure of all the composite strands 22 contained in the rope main body 20 is the same. In addition, the outer diameters of all the composite strands 22 included in the rope main body 20 are the same.

Except for the addition of the intermediate covering body 34 and the outer strand layer 35, the configuration of the suspension body 7 and the configuration of the elevator are the same as in the fourth embodiment. In addition, the manufacturing method of each composite strand 22 is the same as that of Embodiment 1.

In such a suspension body 7, a plurality of composite strands 22 are arranged in multiple layers. For this reason, the strength of the suspension body 7 can be further increased.

In addition, in the suspension body 7 of Embodiment 5, two or more types of composite strands 22 having different cross-sectional configurations may be mixed.

In addition, in the suspension body 7 of Embodiment 5, two or more types of composite strands 22 having different outer diameters may be mixed.

Embodiment 6.

Next, FIG. 18 is a cross-sectional view of the suspension body 7 according to the sixth embodiment, showing a cross section perpendicular to the longitudinal direction of the suspension body 7. In the suspension 7 of Embodiment 6, the composite strand 22 at the center of the suspension 7 of Embodiment 4 shown in FIG. 16 is replaced with the composite strand 22 shown in FIG. 14 .

The outer diameter of the center composite strand 22 is larger than the outer diameter of the other plurality of composite strands 22 .

Other than the structure of the central composite strand 22, the structure of the suspension body 7 and the structure of the elevator are the same as in the fourth embodiment. In addition, the manufacturing method of each composite strand 22 is the same as that of Embodiment 1.

In such a suspension body 7, the outer diameter of the suspension body 7 can be enlarged, without increasing the total number of composite strands 22 in Embodiment 4.

Embodiment 7.

Next, FIG. 19 is a cross-sectional view of the suspension body 7 according to the seventh embodiment, showing a cross section perpendicular to the longitudinal direction of the suspension body 7. In the suspension body 7 of Embodiment 7, a plurality of composite strands 22 included in the outer strand layer 35 of Embodiment 5 shown in FIG. 17 are replaced with composite strands 22 shown in FIG. has been

Other than the configuration of the plurality of composite strands 22 included in the outer strand layer 35, the configuration of the suspension body 7 and the configuration of the elevator are the same as in the fifth embodiment. In addition, the manufacturing method of each composite strand 22 is the same as that of Embodiment 1.

In this way, two or more types of composite strands 22 having different cross-sectional configurations may be used as rope strands, and the design freedom of the suspension body 7 can be improved.

In addition, the composite strand 22 shown in FIG. 3, FIG. 13, and FIG. 14 may be mixed suitably in one rope.

Embodiment 8.

Next, FIG. 20 is a cross-sectional view of the suspension body 7 according to the eighth embodiment, showing a cross section perpendicular to the longitudinal direction of the suspension body 7. In addition to the rope main body 20 of Embodiment 5 shown in FIG. 17, the suspension body 7 of Embodiment 8 has an outer layer cover 36 made of resin. The outer layer cover body 36 covers the outer periphery of the rope body 20 over the entire longitudinal direction of the rope body 20 .

The outer layer covering 36 is required to have high abrasion resistance and a high coefficient of friction. For this reason, it is preferable to use a thermoplastic polyurethane elastomer as the material of the outer layer cover body 36. In particular, it is preferable to use an ether-based thermoplastic polyurethane elastomer having high hydrolysis resistance.

In addition, it is preferable that the outer layer cover body 36 contains a flame retardant. Thereby, flame retardancy of the suspension body 7 can be ensured.

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 main 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 Embodiment 1.

In such a suspension body 7, the outer periphery of the rope main body 20 is covered by the outer layer covering body 36. For this reason, the plurality of composite strands 22 included in the outer strand layer 35 are prevented from directly contacting the drive sheave 5. Thereby, abrasion of the plurality of composite strands 22 included in the outer strand layer 35 can be suppressed. In addition, wear of the drive sheave 5 can be suppressed.

In addition, the friction coefficient of the suspension body 7 with respect to the drive sheave 5 can be increased, and the suspension body 7 can also be applied to a drive sheave 5 with a smaller diameter.

In addition, the outer layer cover body 36 may be provided on the outer periphery of the rope main body 20 shown in Embodiments 1, 3, 4, 6, and 7, and the outer periphery of the rope main body 20 of other cross-sectional configurations.

In Embodiments 1 to 8, plating may be applied to each outer circumferential wire member 24 and each outer circumferential strand 31 . Thereby, corrosion of each outer circumferential wire member 24 and each outer circumferential strand 31 can be suppressed.

In Embodiments 1 and 3 to 8, all rope strands are composite strands 22. However, as long as the composite strand 22 is used as at least one of a plurality of rope strands, it is fine.

Embodiment 9.

Next, FIG. 21 is a cross-sectional view of the suspension body 7 according to the ninth embodiment, showing a cross section perpendicular to the longitudinal direction of the suspension body 7. The suspension body 7 of Embodiment 9 is a belt. In addition, the suspension body 7 of Embodiment 9 has a plurality of composite strands 22 as belt wire members and a belt covering body 37 made of resin.

The composite strands 22 are arranged in one row at intervals from each other in the width direction of the suspension body 7 when a cross section perpendicular to the longitudinal direction of the suspension body 7 is viewed. As each composite strand 22, the composite strand 22 of Embodiment 2 shown in FIG. 14 is used. Moreover, in FIG. 21, six composite strands 22 are used.

The belt covering body 37 covers the plurality of composite strands 22 over the entire longitudinal direction of the suspension body 7 . As the material of the belt covering body 37, it is preferable to use a thermoplastic polyurethane elastomer. In particular, it is preferable to use an ether-based thermoplastic polyurethane elastomer having high hydrolysis resistance.

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

Except that the suspension 7 is a belt, the construction of the elevator is the same as in the first embodiment. Moreover, the manufacturing method of each composite strand 22 is also the same as Embodiment 1.

In such a suspension body 7, compared to the case where a rope is used as the suspension body 7, it can be applied to a drive sheave 5 with a smaller diameter while securing equivalent strength.

In Embodiment 9, all belt wire members are composite strands 22. However, as long as the composite strand 22 is used as at least one of the plurality of belt wire members, it is fine.

Moreover, two or more types of composite strands 22 differing in at least one of cross-sectional configuration and outer diameter may be appropriately mixed in one belt. For example, the composite strands 22 shown in Figs. 3, 13 and 14 may be appropriately mixed in one belt.

Moreover, three or more different space|intervals may be included in the space|interval of the composite strand 22 adjacent to each other.

Embodiment 10.

Next, FIG. 22 is a cross-sectional view of the suspension body 7 according to the tenth embodiment, showing a cross section perpendicular to the longitudinal direction of the suspension body 7. The suspension 7 of Embodiment 10 is a belt. In addition, the suspension body 7 of Embodiment 10 has a plurality of ropes as belt wire members and a belt covering body 37.

Each rope is constituted by the rope main body 20 of Embodiment 5 shown in FIG. 17 . The plurality of rope main bodies 20 are arranged in one row at intervals from each other in the width direction of the suspension body 7 when a cross section perpendicular to the longitudinal direction of the suspension body 7 is viewed. 22, six rope bodies 20 are used.

The belt covering body 37 covers the plurality of rope main bodies 20 over the entire longitudinal direction of the suspension body 7 .

Except that the suspension 7 is a belt, the construction of the elevator is the same as in the first embodiment. Moreover, the manufacturing method of each composite strand 22 is also the same as Embodiment 1.

In such a suspension body 7, compared to the case where a rope is used as the suspension body 7, it can be applied to a drive sheave 5 with a smaller diameter while securing equivalent strength.

Moreover, compared with the case where the composite strand 22 is used as each belt wire member, the intensity|strength of the suspension body 7 can be made high.

In Embodiment 10, all belt line members are ropes. However, as long as a rope containing the composite strand 22 is used as at least one of the plurality of belt wire members, it is fine.

In addition, two or more types of ropes differing in at least one of cross-sectional configuration and outer diameter may be appropriately mixed in one belt.

In addition, three or more different intervals may be included in the intervals between the ropes adjacent to each other.

In addition, the type of elevator is not limited to the type shown in Fig. 1, and a 2:1 roping system may be used, for example.

Further, the elevator may be a machine roomless elevator, a double deck elevator, a one-shaft multi-car type elevator, or the like. The one-shaft multi-car system is a system in which an upper car and a lower car disposed immediately below the upper car independently go up and down a common hoistway.

In Embodiments 1 to 10, a rope or belt is used as the suspension body 7 for suspending the car 8. However, the use of a rope and a belt is not limited to this. For example, ropes and belts can also be applied to elevator governor ropes or compensating. Moreover, a rope and a belt are applicable also to apparatus other than an elevator, for example, a crane apparatus.

3: traction machine 5: driving sheave
7: suspension (rope, belt) 8: elevator car
9: counterweight 11: compensating
20: rope body (belt wire member)
22: composite strand (rope strand, belt wire member)
23: strand core member 23a: groove
24: outer line member 25: high-strength fiber bundle
26: matrix resin 27: high-strength fiber filament
28: core intermediate body 31: outer circumferential strand (outer circumferential wire member)
32: wire 33: strand covering body
36: outer layer covering body 37: belt covering body

Claims (23)

A first step of forming a core intermediate formed by impregnating a high-strength fiber bundle with an uncured matrix resin;
After the first step, a second step of twisting a plurality of steel outer circumferential wire members around the outer circumference of the core intermediate body, and
The manufacturing method of composite strand including the 3rd process of making the said core intermediate body into a fiber-reinforced plastic strand core member by hardening the said matrix resin after the said 2nd process. The method of claim 1,
In the first step, the high-strength fiber bundle formed by twisting a plurality of high-strength fiber filaments with each other is used. The method of claim 1,
In the first step, a method for producing a composite strand in which the high-strength fiber bundle obtained by bundling a plurality of high-strength fiber filaments without twisting each other is used. According to any one of claims 1 to 3,
The method for producing a composite strand in which the second step is performed while applying tension to the core intermediate body. According to any one of claims 1 to 4,
The third step is a method for producing a composite strand comprising a high-frequency induction heating step. Strand core member made of fiber-reinforced plastic, and
A plurality of steel outer circumferential wire members twisted with each other are provided on the outer circumference of the strand core member,
A plurality of grooves are provided on the outer circumferential surface of the strand core member,
In the cross section perpendicular to the longitudinal direction of the strand core member,
A part of each of the outer peripheral line members is inserted into the corresponding groove,
The shape of the inner surface of each groove is a composite strand that is a shape along the outer circumferential surface of each of the outer peripheral line members. The method of claim 6,
In the cross section perpendicular to the longitudinal direction of the strand core member,
A composite strand in which the cross-sectional area of the strand core member is larger than the sum of the cross-sectional areas of all the outer peripheral line members. According to claim 6 or claim 7,
At least one of the outer circumferential line members is an outer circumferential strand,
The outer circumferential strand is a composite strand containing a plurality of steel wire twisted with each other. The method of claim 8,
A composite strand in which the shape of a cross section perpendicular to the longitudinal direction of at least one outer circumferential strand is deformed and becomes circular. The method of any one of claims 6 to 9,
The strand core member includes at least one high-strength fiber selected from the group consisting of carbon fiber, polyparaphenylene benzoxazole fiber, aramid fiber, polyarylate fiber, polyethylene fiber, glass fiber, and bassalt fiber. composite strands. The method of any one of claims 6 to 10,
The strand core member includes a matrix resin made of a flexible resin,
A composite strand in which an epoxy resin or a urethane resin is used as the flexible resin. The method of any one of claims 6 to 10,
The strand core member includes a matrix resin made of a flexible resin,
An epoxy resin is used as the flexible resin,
The epoxy resin is a solid cured by mixing a liquid main agent with a mixture agent,
The main agent is selected from the group consisting of epoxy compounds and epoxidized polybutadiene,
The molecule of the epoxy compound includes at least one selected from the group consisting of a polyoxyalkylene bond and a urethane bond, and at least two epoxy groups,
A composite strand containing two or more epoxy groups in the molecule of the epoxidized polybutadiene. The method of any one of claims 6 to 12,
A composite strand in which plating is applied to each of the outer peripheral line members. A rope body having a plurality of rope strands,
A rope in which the composite strand according to any one of claims 6 to 13 is used as at least one of the plurality of rope strands. The method of claim 14,
The rope according to claim 1 , wherein the rope main body further has a resin strand covering covering an outer periphery of at least one of the composite strands. According to claim 14 or claim 15,
A rope in which two or more types of composite strands having different cross-sectional configurations are used as the rope strands. The method of any one of claims 14 to 16,
A rope further comprising a resin outer layer covering covering the outer periphery of the rope body. The method of claim 17
The outer layer covering is a rope containing a flame retardant. When viewed in a cross section perpendicular to the longitudinal direction, a plurality of belt line members arranged at intervals from each other in the width direction, and
A belt covering body made of resin covering the plurality of belt wire members is provided;
A belt in which the composite strand according to any one of claims 6 to 13 is used as at least one of the plurality of belt wire members. When viewed in a cross section perpendicular to the longitudinal direction, a plurality of belt line members arranged at intervals from each other in the width direction, and
A belt covering body made of resin covering the plurality of belt wire members is provided;
A belt in which the rope according to any one of claims 14 to 18 is used as at least one of the plurality of belt wire members. According to claim 19 or claim 20,
The belt cover body contains a flame retardant. An elevator provided with the rope according to any one of claims 14 to 18. An elevator provided with the belt according to any one of claims 19 to 21.

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