WO2004037702A1 - Rope for elevator - Google Patents

Abstract

A rope for elevator comprising a belt-like rope body. The rope body comprises a plurality of strands, and a resin coating for integrating the strands. The strand includes a plurality of wires stranded in parallel with each other. The strands are arranged laterally in the cross-section perpendicular to the longitudinal direction of the rope body.

Description

 Elebe overnight rope

Technical field

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt-like rope for hanging an elevator used for an elevator.

Background art

 For example, Japanese Patent Publication No. 2002-5044441 discloses various layouts of an elevator system in which a car and a counterweight are suspended by a belt-shaped rope.

Have been. However, the specific structure of the pelt-shaped rope is not sufficiently shown, and a belt-shaped rope structure that can secure stable strength and extend the service life is required. Disclosure of the invention

 The present invention has been made to solve the above-described problems, and has an object to obtain a rope for an elevator that can secure stable strength and extend the life. .

 The elevator rope according to the present invention includes a belt-shaped rope main body, and suspends an elevator cage. The mouth main body has a plurality of strands twisted in parallel. It has a plurality of cords and a resin coating that covers and integrates the cords, and the cords are arranged side by side in a cross section perpendicular to the longitudinal direction of the rope body.

Further, the rope for an elevator in accordance with the present invention includes a belt-shaped rope main body, and suspends a basket of the elevator for an elevator, and the rope main body is made of a resin extending along a longitudinal direction of the rope main body. A plurality of child assemblies including a core material and a plurality of child members arranged around the core material and twisted with the core material, and a child composite are covered and integrated. And a resin covering, and the bindings are a plurality of parallel-twisted ones. The strands including the strands are arranged side by side in a cross section perpendicular to the longitudinal direction of the rope body. BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 is a cross-sectional view of a rope for an elevator in accordance with Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of a rope for an elevator in accordance with Embodiment 2 of the present invention, and FIG. FIG. 4 is a cross-sectional view of a rope for an overnight stay according to a third embodiment. FIG. BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Embodiment 1

 FIG. 1 is a cross-sectional view of an elevator rope according to Embodiment 1 of the present invention. In the figure, a belt-shaped rope body 1 has seven strands 2 and a resin cover 3 that covers and integrates the strands 2. Each cable 2 has a plurality of steel wires 4. The strands 4 are twisted in parallel with each other (refer to JIS G3255.212.2b). In all of the strands 2, all the strands 4 are twisted in parallel. The strands 2 are arranged side by side in a cross section perpendicular to the longitudinal direction of the rope body 1 (FIG. 1). That is, the seven sub-references 2 are arranged so as to be aligned on a straight line at an interval along the width direction of the rope body 1 (the left-right direction in FIG. 1) in a cross section perpendicular to the longitudinal direction of the rope body 1. Have been.

 The diameter of the wire 4 is preferably about 1/400 of the diameter of a sheave (not shown) around which the rope body 1 is wound. Thereby, the bending stress by the sheave can be reduced, and the fatigue resistance can be improved. Also, in order not to make the diameter of the wire 4 extremely small, the Warrington type is more preferable as the cross-sectional structure of the wire 2 than the seal-type filler type specified in JISG355. is there.

 The cover 3 is made of, for example, a thermoplastic ether-based polyurethane resin. At least an outer peripheral portion of each child 2 is provided with an adhesive to integrate the child 2 with the covering 3.

5 is applied. That is, the child 2 and the cover 3 are in contact with each other via the adhesive 5. Is being worn. The adhesive 5 may be applied either before or after the stranding of the strands 4.

 In such an elevator rope, the cords 2 are arranged side by side and are covered with a resin coating 3, so that the movement of the cords 2 can be prevented, and The generation of friction between the sub-elements 2 can be prevented, so that stable strength can be ensured and the service life can be extended.

 Further, since the wires 4 constituting each of the wires 2 are twisted in parallel with each other, the wires 4 are in contact with each other and restrain each other. Accordingly, the contact pressure between the wires 4 is small, and internal wear is less likely to occur in the binding 2, whereby stable strength can be ensured and the life can be extended.

 Particularly, in the first embodiment, since all the strands 4 in all the strands 2 are twisted in parallel, uniform strength can be secured over the entire cross section, and the shape stability is excellent.

 Furthermore, since the steel wire 4 and the hard polyurethane resin coating 3 are used, and the strand 2 and the coating 3 are bonded to each other via the adhesive 5, sufficient abrasion resistance is secured. In addition to this, the stability of the belt shape and the binding property of the child 2 can be improved.

 Here, when the overall strength of the rope body 1 is reduced and the damage is advanced, the nip 2 is broken in the descending order of the load burden or in the order of the damage. On the other hand, if the number of sub-references 2 is increased beforehand, it becomes difficult to equalize the load burden of each sub-reference 2, and therefore an increase in strength in proportion to the number of sub-references 2 cannot be expected.

 Moreover, it is difficult to detect how much the wire 4 inside the covering 3 is damaged by the rope for the elevator integrated with the covering 3. That is, it is considered that the replacement time of the rope body 1 cannot be determined until the child 2 is damaged enough to deform the outer surface of the coating 3 or at least one of the bindings 2 is completely cut. . On the other hand, the remaining strength of the rope

In order to secure about 80%, it is necessary to use five or more cords 2. But,

If the strength of one child ref 2 is so low that it breaks, the other child 緙 2 is also expected to be damaged and the strength is low. Usually, when the JIS exchange standard is reached The residual strength is about 5% lower than the standard value because the standard cutting load has a margin.

 From the above, a suitable number of children 2 is obtained. That is, if a is the prescribed residual strength, b is the normal residual strength under the replacement standard, N is the number of the ties 2, and P is the cutting load of the ties 2, the equation axPxN = bxP (N-1) holds. . If a = 80% and b = 95%, 0.8xPxN = 0.95P (N-1), and N = 6.3, that is, about 7 lines. Therefore, if at least seven pieces 2 are used, sufficient residual strength can be secured.

 The material of the coating 3 is not limited to the thermoplastic ether-based polyurethane resin, but can be appropriately selected according to the use conditions and the like. However, when used in a high-temperature, high-humidity environment, a hard ether-based polyurethane, which hardly causes caro-water decomposition, is more preferable than an ester-based polyurethane, which easily undergoes hydrolysis. Embodiment 2.

 Next, FIG. 2 is a cross-sectional view of an elevator rope for an elevator according to a second embodiment of the present invention. In the figure, a belt-shaped rope main body 11 has seven child reference aggregates 12 and a resin cover 13 that covers and integrates the child aggregates 12. The jig aggregates 12 are arranged side by side in a cross section perpendicular to the longitudinal direction of the rope body 11. That is, the seven restraint assemblies 12 are arranged so as to be aligned with each other along the width direction of the rope body 11 in a cross section perpendicular to the longitudinal direction of the rope body 11 at intervals.

 Each child assembly 12 is composed of a resin core 14 extending along the longitudinal direction of the rope body 11, and three children twisted around the core 14 and arranged around the core 14. Includes 15 and that each. Each child 15 has a plurality of steel strands 16. The strands 16 are twisted in parallel with each other. All strands 16 are parallel-twisted in all of the joints 15.

In each of the child ref aggregates 12, the three nips 15 are arranged in a triangular cross section around the core material 14. The child ref aggregates 12 are arranged such that the sectional arrangement shapes of the children 15 are alternately opposite. As the material of the core material 14, for example, a thermoplastic resin such as a polypropylene resin, a polyethylene resin or vinyl, or a high-strength synthetic resin fiber such as an aramide fiber or a polypropylene fiber can be used at a high density.

 An adhesive 5 is applied to at least the outer peripheral portion of each child 15 in order to be integrated with the cover 13. That is, the child 15 and the cover 13 are adhered to each other via the adhesive 5.

 In such a rope for elevators, since the child aggregates 12 are arranged side by side and are covered with the resin covering 13, the movement of the child aggregates 12 is prevented. In addition to preventing the occurrence of friction between the binding assemblies 12, the stable strength can be ensured and the service life can be extended.

 In addition, since the strands 16 constituting each of the wires 15 are twisted in parallel with each other, internal wear is less likely to occur in the wires 15, which also ensures stable strength and a long life. Can be achieved.

 Furthermore, since the core assembly 14 is composed of the core material 14 and the three strands 15, a thinner strand 16 can be used, and the diameter of the sheave can be reduced. I can go.

 Furthermore, the three bindings 15 are arranged in a triangular cross section around the core material 14, and the binding arrangement 1 2 has the cross-sectional arrangement of the bindings 15 alternately reversed. The ropes 11 can be arranged at high density, and the rope body 11 can be reduced in width while increasing the strength. Can be made smaller. Embodiment 3.

 Next, FIG. 3 is a cross-sectional view of an elevator rope according to Embodiment 3 of the present invention. In this example, a cable including a steel core wire 16 as a strand and six outer circumferential wires 17 arranged around the core wire 16 and twisted in parallel with each other is referred to as a reference 18. Is used. Other configurations are the same as those of the second embodiment.

In such an elevator rope, since the cross-sectional structure of the rope 18 is simple and stable, it has excellent shape stability against external force. Also, compare the diameter of the outer peripheral wire 17 It can be relatively large, and both flexibility and abrasion resistance can be ensured in a well-balanced manner.

 Furthermore, since only one layer of the outer peripheral wire 17 is arranged around the core wire 16, the movement of the outer peripheral wires 17 can be suppressed, and the adhesion stability to the covering 13 can be improved. As a result, the life of the outer peripheral wire 17 can be extended, and the fatigue resistance of the bonded portion to the cover 13 can be improved. Embodiment 4.

 Next, FIG. 4 is a cross-sectional view of a rope for an elevator according to a fourth embodiment of the present invention. In this example, a rubber covering 21 is used. In addition, no adhesive is applied to the braid 18, and instead, the outer peripheral portions of the core wire 16 and the outer peripheral wire 17 are subjected to a partial force treatment such as a phosphate coating treatment or a zinc plating treatment. A film 22 is formed by the process. Other configurations are the same as those of the third embodiment.

 In such an elevator rope, since the adhesive force of the binding 18 to the cover 21 is secured by the coating 22, the adhesive force is more easily secured than in the step of applying the adhesive. be able to.

 In addition, even when the covering in the first and second embodiments is made of rubber, the adhesive force between the binding and the covering is secured by forming a coating by parker treatment on the strand instead of the adhesive. can do.

Claims

The scope of the claims 1. A rope for the Elephant and Eve, which has a belt-shaped rope body and suspends the elevator  The rope body has a plurality of strands in which a plurality of strands are twisted in parallel, and a resin covering body that covers and integrates the strands. Elephant ropes arranged side by side in a cross section perpendicular to the longitudinal direction. 2. The rope according to claim 1, wherein all the strands in all the strands are twisted in parallel. 3. The elepetator according to claim 1, wherein the strand is made of steel, the coating is made of a thermoplastic ether-based polyurethane resin, and the wires and the coating are adhered to each other via an adhesive. Rope. 4. The rope according to claim 1, wherein the seven strands are arranged so as to be aligned in a straight line at an interval in a cross section perpendicular to the longitudinal direction of the rope body. 5. A rope for the elevating night, which has a belt-shaped rope body and suspends the basket of the elevating night.  The rope body is  A plurality of child sets including a resin core material extending along the longitudinal direction of the rope main body and a plurality of child restraints arranged around the core material and twisted with the core material. Body, and  Having a resin coating that covers and integrates the child binding composite,  The binding includes a plurality of strands twisted in parallel with each other, The rope for elevating overnight, wherein the child binding aggregates are arranged side by side in a cross section perpendicular to the longitudinal direction of the rope body. 6. The rope according to claim 5, wherein the core material is made of polyethylene resin. 7. The elevator rope according to claim 5, wherein the core material is made of a synthetic resin fiber. 8. Each of the above-mentioned child ref aggregates has one above-mentioned core and three above-mentioned children arranged in a triangular cross section around the above-mentioned core.  6. The elevator rope according to claim 5, wherein the child ref aggregates are arranged such that cross-sectional arrangement shapes of the child ties are alternately reversed. 9. The elevator according to claim 5, wherein each of the wires includes a steel core wire as the element wire and six outer peripheral wires as the element wires arranged around the core wire. Evening rope. 10. The rope according to claim 5, wherein the covering is made of rubber, and a coating is formed on an outer periphery of the wire by Parker treatment.