JP7032083B2 - Elevator main rope, elevator - Google Patents

Description

The present invention relates to a main rope for an elevator and an elevator using the main rope.

Elevators generally have a structure in which a vertically movable car and a counterweight are connected by an elevator rope via a hoist.

A schematic diagram of an example of a traction type elevator is shown in FIG.
As shown in FIG. 1, a car 1 that can move in the vertical direction and a counterweight 2 are connected by a main rope (elevator rope) 4. One end of the main rope 4 is fixed to the top of the car 1 and the other end is fixed to the top of the balance weight 2 via a sheave 3 connected to a hoist (not shown) and a pulley 5 fixed to the top. Has been done. The difference in tension generated by the car 1 and the balance weight 2 is balanced with the frictional force generated between the main rope 4 and the sheave 3.
Then, by operating the hoisting machine, the car 1 moves in the hoistway 6 in the vertical direction as shown by an arrow in the figure.

As an example of the main rope for an elevator, for example, a rope specified by JIS G 3525 is generally used. A rope has a structure in which a plurality of strands are arranged around a core rope made of synthetic fibers or natural fibers, and these are twisted. The strand has a structure in which a bundle of steel wires is twisted together.
Further, in order to suppress rubbing and wear between steel wires and maintain lubricity between the rope and the sheave, a viscous oil or a grease-like oil is applied to the surface of the rope. Similarly, oil is distributed to the rope, and when tension is applied to the rope, a force acts in the direction in which the steel wire strand compresses the rope, and oil is supplied to the surface of the rope.

In the elevator of FIG. 1, when the tension of the main rope 4 is increased so that the contact surface pressure (hertz surface pressure) at the contact portion between the main rope 4 and the sheave 3 becomes high, the oil on the surface of the main rope 4 becomes the contact portion. An elastic fluid lubricating film is formed, and the power of the hoist is transmitted to the main rope 4 through the contact portion. This is a kind of drive system called a traction drive, and the movement of the main rope 4 drives the car 1 and the balance weight 2 to raise and lower the elevator (lifting and lowering the car 1).

The material and structure of the main rope are important design items because they affect the elevating performance of the elevator system. Specific examples include the minimum bending radius, weight, strength, and power transmission performance of the main rope. For example, the minimum bending radius (bending radius) of the main rope affects the diameter of the pulley connected to the rope in the elevator. As the bending radius of the main rope increases, the diameter of the pulley also needs to be increased in accordance with the bending of the rope, and as a result, the volume occupied by the entire elevator system increases, and a complicated layout is required.

Here, in the elevator system on the higher floor, the main rope also needs to be lengthened according to the hoistway. In addition to the car cage and the weight of the balance, the main rope also bears its own weight, so it is necessary to use a main rope with a large diameter to support these. As a result, the entire elevator system becomes heavier and the energy efficiency associated with ascending and descending is greatly reduced. Therefore, in addition to the strength to support tension, the main rope is required to be applied with a lightweight material that has appropriate flexibility and reduces the system load.

As an example of the prior art to meet these requirements, Patent Document 1 discloses a belt-shaped rope. The rope described in Patent Document 1 has a belt shape and includes a plurality of load-bearing members, and each load-bearing member is oriented apart in the width direction of the belt-shaped rope and has high frictional resistance. It has a structure embedded in the coating.

Japanese Unexamined Patent Publication No. 2015-74871

The problem to be solved by the prior art such as the rope described in Patent Document 1 is that the structure in which the load-bearing member is arranged in the width direction is limited, so that the structure that the main rope can take is limited.
The belt shape mainly used in the main rope of the prior art has a structure suitable for contact with the sheave surface and bending in one direction. On the other hand, since the bending direction is limited, there are restrictions on roping when arranging in the hoistway.
The problem to be solved in the main rope is the degree of freedom in shape and formability, which allows the shape to be arbitrarily changed according to the design of the elevator system, for example, the main rope having a structure that can be adapted to complicated roping. It is to provide an excellent main line.

In addition, since the main rope of the prior art has a structure in which the load-bearing member is integrated with the resin-coated portion (coating), the bundle of high-strength fibers used as the load-bearing member is in direct contact with each other. Has. For this reason, there is a possibility that the fiber may be broken due to rubbing of the fiber due to bending or the like, resulting in a decrease in strength.
A problem to be solved separately in the main rope is to provide a highly reliable main rope that can prevent disconnection due to rubbing between fibers in advance.

As described above, the conventional technique cannot provide a main search that sufficiently satisfies the above-mentioned problems, and further improvement has been desired.

An object of the present invention is that, in view of the above circumstances, the system load can be reduced, and the shape can be arbitrarily changed according to the strength, flexibility, and design of the elevator system. The purpose is to provide a main rope having excellent reliability that can prevent disconnection. Further, an object of the present invention is to provide an elevator using this main rope.

In addition, the above object and other purposes and novel features of the present invention will be clarified by the description and the accompanying drawings of the present specification.

The present invention is a main rope for an elevator, the core portion arranged in the long direction of the main rope, the high-strength portion arranged around the core portion, and the high-strength portion arranged around the high-strength portion. It is composed of a support part that maintains the shape of the part and a covering part made of a resin material that covers the entire main cord, and the core part is selected from polyurethane resin, silicone resin, polyethylene resin, polypropylene resin, and polybutene resin. A material selected from at least one of a single resin, a mixture of a plurality of the resins, a thermoplastic elastoma containing the resin as a component, natural rubber, synthetic rubber , and a composite material containing the resin and an inorganic substance is used. The high-strength portion is formed of a load-bearing filament made of high-strength fibers, and the high-strength portion has a load-bearing filament structure in which fiber bundles are woven together, and is solid or solid on the surface or inside of the structure. A liquid lubricant is arranged.

The elevator of the present invention includes a main rope, a hoist that winds the main rope, a counterweight connected to the main rope, and a car that is connected to the main rope and driven by hoisting the main rope. , And the elevator main rope of the present invention is used as the main rope.

According to the above-mentioned main rope for elevators of the present invention, a high-strength portion formed of a load-bearing filament made of high-strength fibers is arranged around the core portion, so that the main rope using a conventional steel wire is used. It is possible to obtain a main rope having a high load-bearing capacity with respect to the weight of the rope, and it is possible to obtain high strength, flexibility, and reduce the system load. In addition, the shape of the main rope, which was conventionally limited to the shape of the belt, can be arbitrarily changed according to the design of the elevator system, and the structure has excellent shape freedom and formability of the main rope. Further, it is possible to suppress disconnection due to rubbing between fibers, and it is possible to significantly improve the reliability of the high-strength portion.

Further, according to the elevator of the present invention, by using the main rope for the elevator according to the present invention, it is possible to provide an elevator that contributes to miniaturization and energy saving by minimizing the increase in the weight of the system even when the floor is raised. can do.

Issues, configurations and effects other than those described above will be clarified by the following description of the embodiments.

It is a schematic diagram of an example of a traction type elevator. It is sectional drawing of the embodiment of the main rope for an elevator of this invention. It is sectional drawing of the embodiment of the main rope for an elevator of this invention. It is sectional drawing of the embodiment of the main rope for an elevator of this invention. A to D It is a formation method and schematic diagram (side view and sectional view) of 1st Example of the main rope for an elevator of this invention. A to D It is a formation method and a schematic view (side view and sectional view) of the 2nd Example of the main rope for an elevator of this invention. A to D 3 is a method of forming and a schematic view (side view and sectional view) of a third embodiment of the main rope for an elevator of the present invention. A to D It is a formation method and schematic diagram (side view and sectional view) of 4th Example of the main rope for an elevator of this invention. A to C It is a formation method and schematic diagram (side view and sectional view) of the 5th Example of the main rope for an elevator of this invention. A to D It is a formation method and schematic diagram (side view and sectional view) of the 6th Example of the main rope for an elevator of this invention.

Hereinafter, embodiments according to the present invention will be described with reference to text or drawings. However, the structure, materials, and other specific numerical values shown in the present invention are not limited to the embodiments taken up here, and can be appropriately combined and improved without changing the gist. In addition, elements not directly related to the present invention are not shown.

The main rope for an elevator of the present invention has a core portion arranged in the long direction of the main cord, a high-strength portion arranged around the core portion, and a high-strength portion arranged around the high-strength portion. It is composed of a support part to be maintained and a covering part made of a resin material that covers the entire main rope.
The high-strength portion of the main rope for an elevator of the present invention is formed of a load-bearing filament made of high-strength fibers.
Although each part constituting the main rope for an elevator of the present invention has an independent structure, the high-strength part and the support part may be shared in the same structure.

The elevator of the present invention includes a main rope, a hoisting machine that winds the main rope, a balance weight connected to the main rope, and a car that is connected to the main rope and driven by hoisting the main rope. The elevator main rope of the present invention is used as the main rope.

Here, embodiments showing various shapes of the main rope for an elevator of the present invention are shown in schematic cross-sectional views of FIGS. 2 to 4, respectively.
In each of the embodiments shown in FIGS. 2 to 4, the main rope is composed of four parts: a core portion (7,7', 7 ″), a high-strength portion 8, a support portion 9, and a covering portion 10.

In the embodiment shown in FIG. 2, the core portion 7 having a round bar shape (a circular cross section with a solid structure / filling structure) is provided, and the high-strength portions 8 are concentrically formed around the core portion 7 along the core portion 7. The support portion 9 and the covering portion 10 are formed.

In the embodiment shown in FIG. 3, it has a core portion 7'of a square columnar shape (square rod shape, rectangular cross section, solid structure / filling structure), and has a substantially rectangular shape around the core portion 7'. , High-strength portion 8, support portion 9, and covering portion 10 are formed.

In the embodiment shown in FIG. 4, the core portion 7 "has a cylindrical shape (the cross section is annular and has a hollow structure), and along the core portion 7", the high-strength portion 8 and the support portion are concentrically formed around the core portion 7 ". 9 and the covering portion 10 are formed.

Hereinafter, the configuration of each part of the main rope for an elevator of the present invention will be described in detail.

(Core part of main rope)
As shown in FIGS. 2 to 4, the core portion of the main cord of the present invention is arranged in the central portion of the main cord and is arranged in the elongated direction of the main cord. That is, the core portion has a long structure formed by extending in a direction parallel to the long direction of the main rope.

The main rope is required to have a function of appropriately supporting the shape of the main rope against bending and a load in the plane direction, for example, in a contact portion with a sheave connected to a hoist, and has appropriate flexibility and compressive rigidity. It is important to have.
Further, the shape of the main cord is substantially determined by the structure of the core portion. For this reason, the core so that the cross section of the contact part of the main rope with the sheave is in contact with a circle (round / ellipse) or a plane, and the shape of the main rope is a preferable shape according to the design of the elevator system. Select the shape of the part.

At this time, by designing the elevator system to allow deformation of the main rope within a certain range, the degree of freedom in designing the core portion can be further increased.
For example, by forming the core portion into a round bar shape as shown in FIG. 2, it becomes a rope-shaped main rope having no bending anisotropy.
For example, a belt-shaped main cord can be obtained by forming the core portion into a square rod shape as shown in FIG. 3.
For example, by forming the core portion into a hollow cylindrical shape as shown in FIG. 4, the main cord becomes elliptical or flat only at the contact portion with the sheave, and the power transmission capacity between the sheave and the main cord is improved. Is possible.
Further, in order to make the contact surface of the main rope with the sheave flat, a rectangular shape as shown in FIG. 3 or a polygonal prism shape such as a triangular prism, a pentagonal note, or a hexagonal note is selected for the shape of the core portion. Is also good. By forming the core portion into a rectangular shape or a polygonal pillar shape and covering it with a covering portion with a constant material thickness, a main rope having a flat outer surface can be constructed.

As described above, the shape of the main rope is substantially determined by the structure of the core part. Therefore, by selecting the shape of the core part, the shape of the main rope can be arbitrarily changed according to the design of the elevator system. It will be possible. As a result, it is possible to realize a main rope having a structure having an excellent degree of freedom in shape and formability.

The material of the core portion can be used without particular limitation as long as the performance of the core portion is satisfied. Specific examples of the material include polyurethane resin, silicone resin, polyethylene resin, polypropylene resin, polybutene resin, thermoplastic elastoma containing the above resin, natural rubber, synthetic rubber and the like. Then, from these materials, a core portion made of at least one selected material is formed. In addition to the above-mentioned simple substance of resin, in order to impart appropriate flexibility and compressive rigidity, a mixture of the above-mentioned resins (polymer blend, etc.) or a composite material containing an inorganic substance (inorganic to resin) may be used, depending on the application. It is possible to use a material in which a filler is dispersed, etc.). Further, high-strength fibers may be contained as long as the performance of the core portion is satisfied. Examples of high-strength fibers include carbon fibers, para-aramid fibers, ultra-high molecular weight polyethylene fibers, polyallylate fibers, polybenzoxazole fibers and the like. Further, a UD (Uni-Directional) tape in which high-strength fibers such as carbon fibers are arranged in one direction and impregnated with a resin and molded into a tape shape may be used.
By using the above-mentioned material for the core portion, the weight of the main rope can be reduced as compared with the main rope using the conventional steel wire.

(High-strength part of main rope)
As shown in FIGS. 2 to 4, the high-strength portion of the main cord of the present invention is arranged around the core portion of the main cord and is formed so as to extend in the elongated direction of the main cord.
The high-strength portion of the main rope is formed of a load-bearing filament made of high-strength fibers, and a plurality of load-bearing filaments parallel to the long direction of the main rope, or a plurality of twisted load-bearing filaments. It is composed of.
Further, a solid or liquid lubricant is arranged on the surface or the inside of the load-bearing filament.
The structure of the high-strength portion is not particularly limited as long as the strength and reliability required for the main rope are ensured.
An example of a more specific configuration of the high-strength portion will be described in detail by an example of a main rope described later (see FIGS. 5 to 10).

By arranging a high-strength portion formed of a load-bearing filament having a high-strength potential around the core portion, the tension in the long direction of the main rope can be supported by the load-bearing filament of the high-strength portion.
Since the tension in the long direction of the main rope is supported by the load-bearing filament of the high-strength portion in this way, the above-mentioned resin material or the like can be used for the core portion. By using a resin material or the like for the core portion, the weight of the main rope can be reduced as compared with the main rope using the conventional steel wire.

Examples of high-strength fibers forming load-bearing filaments are high-strength and high-elasticity fibers such as carbon fibers, para-aramid fibers, ultra-high molecular weight polyethylene fibers, polyallylate fibers, and polybenzoxazole fibers, and more preferably. It is carbon fiber. Further, a UD tape in which high-strength fibers such as carbon fibers are arranged in one direction and impregnated with a resin and molded into a tape shape may be appropriately used.
Carbon fiber has excellent tensile strength characteristics and tensile rigidity, and is suitable as a main rope for elevators.
On the other hand, since carbon fibers are vulnerable to forces and rubbing from the surface direction, reliability can be greatly improved by arranging the fibers densely and covering the surface with a sufficient lubricant.

The lubricant that covers the load-bearing filament can be used without particular limitation as long as it does not chemically interact with or deteriorate with the core portion or the high-strength fiber. Specifically, mineral oils (paraffin oil, naphthenic oil), synthetic ester oils, synthetic ether oils, synthetic hydrocarbon oils, silicone oils, and other mixed oils, or greases and waxes based on these oils, etc. It is a solid lubricant at room temperature.
The method of arranging these lubricants on the load-bearing filament is not particularly limited, but a method of impregnating the load-bearing filament in advance and arranging the lubricant, a method of arranging the load-bearing filament on the main rope and then immersing the lubricant in the lubricant, etc. There is.

Further, instead of the lubricating oil, a prepreg or the like in which a self-lubricating resin material such as a fluororesin is compounded can be appropriately used.

In addition to the above-mentioned lubricant, a component other than the load-bearing filament can be appropriately blended in the high-strength portion, but the component other than the load-bearing filament (including the lubricant) is 50 of the cross-sectional area of the high-strength portion. It is desirable to be less than%.

(Support part of main rope)
As shown in FIGS. 2 to 4, the support portion of the main rope of the present invention is arranged around the high-strength portion to support the high-strength portion.
The support portion is intended to maintain, bind, or fix the shape of the high-strength portion by bringing the high-strength portion into close contact with the core portion.
Examples of such a support portion include a structure in which the support portion is spirally wound around the high-strength portion.

Since the main rope of the present invention has a structure that bears tension in the high-strength portion, the support portion itself does not necessarily have high strength, but it is integrated with the high-strength portion, so that it is a high-strength portion. It is desirable that the structure has the same strength and can support the high-strength part.

The material and shape of the support portion are not particularly limited, but it is desirable to use a tape-shaped, film-shaped or string-shaped structure in consideration of the processability at the time of forming the main cord. Further, for the purpose of strengthening the fixing by the support portion, it is also possible to form an adhesive layer on the surface of the support portion or to use a semi-cured product (prepreg) for the support portion.

As the material of the support portion, it is desirable to use resin or high-strength fiber as the base material.
Examples of the resin material include polyurethane resin, silicone resin, polyethylene resin, polypropylene resin, polybutene resin, thermoplastic elastoma containing the above resin, natural rubber, synthetic rubber and the like. Further, by using the heat-sealing tape / film using these as the main materials, the reliability of the winding support can be further enhanced. Further, a UD tape in which high-strength fibers such as carbon fibers are arranged in one direction and impregnated with a resin and molded into a tape shape may be appropriately used.
Examples of high-strength fibers include carbon fibers, para-aramid fibers, ultra-high molecular weight polyethylene fibers, polyallylate fibers, polybenzoxazole fibers and the like.

At this time, if the support portion can have sufficient strength against tension, the support portion can also be used as the high strength portion. When the support portion also serves as a high-strength portion in this way, the high-strength portion / support portion is formed by a structure of a load-bearing filament made of high-strength fibers. Wrap in one direction or in multiple directions. At this time, a solid or liquid lubricant is arranged on the surface or inside of the load-bearing filament structure made of high-strength fibers.

(Cover of main rope)
The covering portion of the main rope of the present invention is made of a resin material and has a structure capable of covering the entire main rope as shown in FIGS. 2 to 4.
By covering the entire main rope with a covering part made of a resin material, the effect of the support part can be further enhanced, the shape of the main rope is stabilized, the inner layer part is well protected, and the surface of the main rope is mediated. Good power transmission capacity can be realized.

The material of the covering portion can be used without particular limitation as long as the performance of the covering portion is satisfied. Specific examples of the material include polyurethane resin, silicone resin, polyethylene resin, polypropylene resin, polybutene resin, thermoplastic elastoma containing the above resin, natural rubber, synthetic rubber and the like. Then, from these materials, a covering portion made of at least one selected material is formed.
In addition to the above-mentioned simple substance of resin, in order to impart appropriate flexibility and compressive rigidity, a mixture of the above-mentioned resins (polymer blend, etc.) or a composite material containing an inorganic substance (inorganic to resin) may be used, depending on the application. It is possible to use a material in which a filler is dispersed, etc.).
By constructing the covering portion using the above-mentioned material, the inner layer portion can be protected and the power transmission through the surface of the main cord can be satisfactorily performed.

As the material of the covering portion described above, the same material as the material mentioned as the material of the core portion is mentioned. Therefore, the same material can be used for the material of the core portion and the material of the covering portion, but the material does not necessarily have to be the same. It is also possible to adopt more appropriate different materials for each of the core portion and the covering portion, depending on the required characteristics, the difference in the molding method, and the like. For example, it is possible to use different types of resins for the core part and the covering part, to make the mixing ratio of the polymer blend resin different, to make the kind and mixing ratio of the inorganic substances of the composite material different, and the like. ..

Further, it is desirable that the covering portion occupies a larger part in the width direction of the cross section of the main rope in the entire main rope. Preferably, it is desirable to form the covering portion thicker than the thickness of the high-strength portion and the supporting portion combined. More preferably, it occupies 50% or more in the width direction of the cross section of the main rope.

(Elevator using main rope)
The elevator main rope composed of the above-mentioned core portion to the covering portion can be applied to an elevator main rope as shown in FIG. 1 as an example.

At this time, the main rope needs to have a structure that supports the tension between the elevator system cage and the balanced weight, and it is desirable that the elastic modulus of the main rope is at least 2 GPa or more. More preferably, the elastic modulus of the main cord is in the range of 2.5 to 5 GPa.
Since the main cord has a sufficient elastic modulus in this way, the main cord has flexibility and reliability, and has a structure that can be adapted to complicated roping. This makes it possible to provide a main rope having an excellent degree of freedom in shape and formability, which can be arbitrarily changed in shape according to the design of the elevator system. In particular, it is a feature of the present invention that the service life is long and the bending radius can be reduced.

Next, a vertically movable elevator car and an elevator formed by roping including at least one rope to suspend the car will be described. The roping includes at least one main rope, preferably a plurality of main ropes shown in the present invention. Depending on the performance of the main rope, an elevator with good power transmission performance and high elevating ability can be realized.
Further, due to the configuration of the main rope of the present invention (particularly, the structure and material of each part), the main rope has good bending characteristics, so that the main rope can be driven by a drive wheel having a small radius. As a result, a sheave having a high rotation speed can be applied as needed, and the degree of freedom in designing the entire system is improved.

Further, it is possible to easily form the roping arrangement with a high degree of freedom for the roping path in which the sheave and / or the turning pulley of the elevator is wound one or more times. In addition, by using a round bar-shaped core as the main rope, there are no restrictions on the bending direction, and the counterweight can be suspended by free roping.

Next, as an embodiment of the present invention, a more specific example of the main rope for an elevator of the present invention will be shown together with a method for forming the main rope. All of these examples are main ropes having flexibility and reliability of the main rope and having a structure suitable for complicated roping.

In each of the drawings of the embodiment, the left half is a side view and the right half is a cross-sectional view of a plane along the central axis, and the right figure is a cross-sectional view of a plane perpendicular to the central axis. It is supposed to be.

(First Example)
A first embodiment of the main rope for an elevator of the present invention is shown in FIGS. 5A to 5D.
In this example, the load-bearing filaments of the high-strength portion are arranged in parallel in the long direction of the main rope.

First, as shown in FIG. 5A, a round bar-shaped core portion 7 is prepared. The method for forming the core portion 7 is not particularly limited as long as it can be formed in the shape of a round bar.

Next, as shown in FIG. 5B, the load-bearing filament 11 is arranged around the core portion 7 in parallel with the length direction of the main cord to form a high-strength portion. A lubricating material (high-viscosity lubricating oil, grease or wax) is arranged on the surface of the load-bearing filament 11.
Then, as partially shown at the left end of the side view of FIG. 5B, the load-bearing filament 11 in the vertical direction in the drawing is wound so that the load-bearing filament 11 parallel to the long direction of the main rope does not disperse. It is desirable to bundle them. The load-bearing filament in the vertical direction does not have to be provided as densely as the load-bearing filament in the long direction.
In the figure on the right of FIG. 5B, the load capacity parallel to the long direction of the main rope is shown by dots, and the vertical load capacity filament is not shown.

Next, as shown in FIG. 5C, the support portion 9 is formed by spirally winding a tape-shaped or film-shaped structure around the high-strength portion made of the load-bearing filament 11.

Further, as shown in FIG. 5D, a covering portion 10 made of a resin material is formed around the supporting portion 9. Thereby, the main rope for the elevator of the first embodiment can be manufactured.

In the structure of the main rope of this embodiment, the same load-bearing filaments 11 are not twisted together and are all arranged in parallel with the core portion 7. Most of the load-bearing filaments 11 are fiber bundles arranged in the long direction of the main rope, and high-strength portions can be arranged at high density.
Further, the lubricant arranged on the surface of the load-bearing filament 11 plays a role of temporarily fixing the filaments to each other in the process of forming the main rope, and the support portion 9 firmly supports the structure of the main rope. ..

(Second Example)
A second embodiment of the main rope for an elevator of the present invention is shown in FIGS. 6A to 6D.
This example is an example in which a plurality of twisted load-bearing filaments are arranged to form a high-strength portion.

First, as shown in FIG. 6A, a round bar-shaped core portion 7 is prepared in the same manner as in FIG. 5A of the first embodiment.

Next, a plurality of twisted load-bearing filaments are formed as one unit 12. Then, as shown in FIG. 6B, a plurality of the units 12 are arranged to cover the periphery of the core portion 7 to form the high-strength portion 13. In addition, in FIG. 6B and later, the detailed illustration of the unit 12 is omitted.

As an example of a plurality of twisted load-bearing filament structures constituting the unit 12, it is desirable to have a twisted structure around the central filament. In this structure, the central filament has a round structure, and at least one layer of the twisted load-bearing filaments is in contact with the central filament and has a dense structure. Each unit 12 is arranged so as to extend in the longitudinal direction of the main rope.

In this embodiment, the lubricant is arranged in the entire load-bearing filament of the high-strength portion. Further, the surface may be coated with a polymer coating or the like.

Next, as shown in FIG. 6C, the support portion 9 is formed by spirally winding a tape-shaped or film-shaped structure around the high-strength portion 13 made of the load-bearing filament unit 12.

Further, as shown in FIG. 6D, a covering portion 10 made of a resin material is formed around the supporting portion 9. Thereby, the main rope for the elevator of the second embodiment can be manufactured.

In the structure of the main rope of this embodiment, since the unit 12 in which the load-bearing filaments are twisted is arranged so as to extend in the longitudinal direction of the main rope, it exhibits high tensile rigidity and strength with respect to the elongation of the main rope. ..

In this embodiment, since the number of fiber bundles arranged in the longitudinal direction of the main rope is smaller than that in the first embodiment, it is necessary to widen the cross-sectional area of the high-strength portion 13, but the load-bearing filament is prepared in advance. By twisting the two to form the unit 12, the productivity at the time of forming the main rope is increased, and the shape stability of the main rope is also excellent.

(Third Example)
A third embodiment of the main rope for an elevator of the present invention is shown in FIGS. 7A to 7D.
In this embodiment, instead of twisting the load-bearing filaments together, the load-bearing filaments are woven from the vertical and horizontal directions with respect to the core portion to form a layered structure.

First, as shown in FIG. 7A, a round bar-shaped core portion 7 is prepared in the same manner as in FIG. 5A of the first embodiment.

Next, as shown in FIG. 7B, a load-bearing filament 14 extending in a direction parallel to the longitudinal direction of the main cord and a direction perpendicular to the longitudinal direction of the main cord is woven with respect to the core portion 7 and perpendicular to each other. A high-strength part is formed by a layered structure woven plain in the vertical and horizontal directions. In each cross-sectional view after FIG. 7B, detailed illustration of the high-strength portion is omitted.

In this embodiment, a solid or liquid lubricant is arranged on the surface or inside of the layered structure of the high-strength portion.

Any method can be used as a method for producing a layered structure in which the load-bearing filament 14 is woven in the vertical and horizontal directions, which constitutes the high-strength portion of the present embodiment. For example, a method of weaving one by one directly on the surface of the core portion 7 or a method of separately producing a pre-woven one and covering it with the core portion 7 can be used.

Next, as shown in FIG. 7C, a support portion 9 is formed by spirally winding a tape-shaped or film-shaped structure around a high-strength portion made of a load-bearing filament 14 woven in the vertical and horizontal directions. do.

Further, as shown in FIG. 7D, a covering portion 10 made of a resin material is formed around the supporting portion 9. Thereby, the main rope for the elevator of the third embodiment can be manufactured.

In the structure of the main rope of this embodiment, since the load-bearing filament 14 is directly formed on the surface of the core portion 7, it has a structure having high density and excellent dimensional stability. Further, since the load-bearing filaments 14 are structurally supported from each other, even if a part of the load-bearing filaments 14 is broken, the strength is less likely to decrease. Therefore, the reliability for long-term use of the main rope is increased.

(Fourth Example)
A fourth embodiment of the main rope for an elevator of the present invention is shown in FIGS. 8A to 8D.
In this embodiment, instead of twisting the load-bearing filaments together, the load-bearing filaments are woven from two diagonally intersecting directions with respect to the core portion to form a layered structure.

First, as shown in FIG. 8A, a round bar-shaped core portion 7 is prepared in the same manner as in FIG. 5A of the first embodiment.

Next, as shown in FIG. 8B, a high-strength portion is formed by a layered structure in which a load-bearing filament 15 extending diagonally in the lower right direction and the upper right direction in the figure is woven with respect to the core portion 7. In each cross-sectional view after FIG. 8B, detailed illustration of the high-strength portion is omitted.

In this embodiment, a solid or liquid lubricant is arranged on the surface or inside of the layered structure of the high-strength portion.

Any method can be used as a method for producing a layered structure in which the load-bearing filament 15 is woven in two diagonally intersecting directions, which constitutes the high-strength portion of the present embodiment. For example, a method of weaving one by one directly on the surface of the core portion 7 or a method of separately producing a pre-woven one and covering it with the core portion 7 can be used.

Next, as shown in FIG. 8C, a tape-like or film-like structure is spirally wound around a high-strength portion composed of a load-bearing filament 15 woven in two diagonally intersecting directions. The support portion 9 is formed.

Further, as shown in FIG. 8D, a covering portion 10 made of a resin material is formed around the supporting portion 9. Thereby, the main rope for the elevator of the fourth embodiment can be manufactured.

In the structure of the main rope of this embodiment, since the load-bearing filament 15 is directly formed on the surface of the core portion 7, it has a structure having high density and excellent dimensional stability as in the third embodiment. Further, since the load-bearing filaments 15 are structurally supported from each other, even if a part of the load-bearing filaments 15 is broken, the strength is less likely to decrease. Therefore, the reliability for long-term use of the main rope is increased.

(Fifth Example)
A fifth embodiment of the main rope for an elevator of the present invention is shown in FIGS. 9A to 9C.
In this embodiment, instead of providing the high-strength portion and the support portion separately, the support portion also supports the tension to serve as the high-strength portion.

First, as shown in FIG. 9A, a round bar-shaped core portion 7 is prepared in the same manner as in FIG. 5A of the first embodiment.

Next, as shown in FIG. 9B, a tape-like or film-like structure formed of a load-bearing filament made of high-strength fibers is spirally wound around the core portion 7 to increase the height of the layered structure. It constitutes a strength portion and a support portion 16. In each cross-sectional view after FIG. 9B, detailed illustration of the high-strength portion / support portion 16 is omitted.

In this embodiment, a solid or liquid lubricant is arranged on the surface or inside of the layered structure of the high-strength portion / support portion 16.

Further, as shown in FIG. 9C, a covering portion 10 made of a resin material is formed around the high-strength portion / supporting portion 16. Thereby, the main rope for the elevator of the fifth embodiment can be manufactured.

In the structure of this embodiment, the strength in the long direction of the main rope is lower than that in the case where the high-strength portion and the support portion are separately provided, but the high-strength portion is also used as the support portion to achieve high strength. Since the process of forming the part can be omitted, the effect of saving the process can be obtained.

(Sixth Example)
A sixth embodiment of the main rope for an elevator of the present invention is shown in FIGS. 10A to 10DC.
In this embodiment, as in the fifth embodiment, instead of providing the high-strength portion and the support portion separately, the support portion also supports the tension to serve as the high-strength portion. This is an example in which a high-strength part and a support part are wound from the direction.

First, as shown in FIG. 10A, a round bar-shaped core portion 7 is prepared in the same manner as in FIG. 5A of the first embodiment.

Next, as shown in FIG. 10B, a tape-like or film-like structure formed of a load-bearing filament made of high-strength fibers is spirally wound around the core portion 7 to increase the height of the layered structure. It constitutes a strength portion and a support portion 16. In this embodiment, the high-strength portion / support portion 16 is designated by the same reference numeral as in the fifth embodiment, but the thickness of the high-strength portion / support portion 16 is the high-strength portion / support portion of the fifth embodiment. It is about half the thickness of the portion 16. In each cross-sectional view after FIG. 10B, detailed illustration of the high-strength portion / support portion 16 is omitted.

Next, as shown in FIG. 10C, a load-bearing filament made of high-strength fibers is used around the high-strength portion / support portion 16 in a direction diagonally intersecting the winding direction of the high-strength portion / support portion 16. The formed tape-shaped or film-shaped structure is spirally wound to form a second high-strength portion / support portion 17 having a layered structure. The thickness of the second high-strength portion / support portion 17 is about half the thickness of the high-strength portion / support portion 16 of the fifth embodiment. In each cross-sectional view after FIG. 10C, the detailed illustration of the second high-strength portion / support portion 17 is omitted.

In this embodiment, a solid or liquid lubricant is arranged on the surface or inside of each layered structure of the high-strength portion / support portion 16 and the second high-strength portion / support portion 17.

In this embodiment, the same material is used for the high-strength portion / support portion 16 and the second high-strength portion / support portion 17 as long as they are configured to be formed of a load-bearing filament made of high-strength fibers. Alternatively, different materials may be used.

Further, as shown in FIG. 10D, a covering portion 10 made of a resin material is formed around the second high-strength portion / supporting portion 17. Thereby, the main rope for the elevator of the sixth embodiment can be manufactured.

In the structure of this embodiment, the strength in the long direction of the main rope is lower than that in the case where the high-strength portion and the support portion are separately provided, but the high-strength portion is also used as the support portion to achieve high strength. Since the process of forming the part can be omitted, the effect of saving the process can be obtained.

Each of the above-described examples is an example in which the features of each structure are simply shown, and the configurations of a plurality of examples can be appropriately combined and used.

Further, in each of the above-described embodiments of FIGS. 5 to 10, the round bar-shaped core portion 7 similar to that of the embodiment of FIG. 2 was used, but the square bar-shaped or cylindrical core portion similar to that of FIGS. 3 and 4 was used. A core portion having another shape such as a core portion may be used. Even if a core portion having another shape is used, as in each embodiment, a high-strength portion, a support portion, and a covering portion can be formed around the core portion to form the main rope for an elevator of the present invention. can.

Further, the elevator main rope having the above configuration can be used for the elevator shown in FIG.
One end of the main rope (rope) is fixed to the top of the hoistway, and the rope is routed in the order of the car, the sheave connected to the hoist, the pulley fixed to the top, and the balance weight, and both ends are balanced with the car. It has a structure fixed at the top of the weight. This is a traction type elevator having a mechanism in which a main rope is driven through a sheave by rotating a hoist, and a counterweight and a car are driven.

Since the main rope according to the present invention is particularly lightweight and has high strength, it exhibits performance in downsizing an elevator on a higher floor or the elevator system itself.
Further, since the main rope itself is covered with a covering portion made of a resin material, it is effective in extending the life of the main rope. Therefore, it is possible to reduce the maintenance frequency and the work process required for maintenance, suppress the wear of the elevator rope and the like, and extend the life of the elevator.

It should be noted that each of the above-described embodiments has been specifically described for the purpose of assisting the understanding of the present invention, and the present invention is not limited to providing all the described configurations. For example, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to delete a part of the configuration of each embodiment, replace it with another configuration, or add another configuration.

1 Cargo, 2 Balanced weight (counterweight), 3 sheaves, 4 main ropes, 5 pulleys, 6 hoistways, 7 cores (round bar), 7'cores (square bars), 7 "cores (cylindrical) , Hollow) 8 High-strength part, 9 Support part, 10 Coating part, 11 Load-bearing filament, 12 Unit (of twisted load-bearing filament), 13 High-strength part, 14 Load-bearing filament, 15 Load-bearing filament, 16 High Strength part and support part, 17 Second high strength part and support part

Claims (4)

The main rope for elevators
The core part arranged in the long direction of the main rope and
The high-strength part arranged around the core part and
A support portion arranged around the high-strength portion and maintaining the shape of the high-strength portion, and a support portion.
It is composed of a covering portion made of a resin material that covers the entire main rope.
The core portion is a single resin selected from polyurethane resin, silicone resin, polyethylene resin, polypropylene resin, and polybutene resin, a mixture of a plurality of the resins, a thermoplastic elastoma containing the resin as a component, natural rubber, and synthetic rubber. , A material selected from at least one of the composite materials containing the resin and the inorganic substance is used.
The high-strength portion is formed of a load-bearing filament made of high-strength fibers.
The high-strength portion has a structure of the load-bearing filament in which fiber bundles are woven together, and a solid or liquid lubricant is arranged on the surface or inside of the structure for an elevator. Main rope. The main rope for an elevator according to claim 1, wherein the core portion has a round bar shape and has a solid structure or a hollow long structure. The covering portion is a single resin selected from polyurethane resin, silicone resin, polyethylene resin, polypropylene resin, and polybutene resin, a mixture of a plurality of the resins, a thermoplastic elastoma containing the resin as a component, natural rubber, and synthetic rubber. The main rope for an elevator according to claim 1 or 2, wherein a material selected from at least one kind of a composite material containing the resin and an inorganic substance is used . Main rope and
The hoisting machine that winds the main rope and
With the balanced weight connected to the main rope,
It is equipped with a car that is connected to the main rope and is driven by winding the main rope.
An elevator characterized in that the elevator main rope according to any one of claims 1 to 3 is used for the main rope.

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