JP2019049064A - Elevator main lope and elevator - Google Patents

Abstract

To provide a highly reliable elevator main rope capable of reducing a system load and preventing disconnection due to rubbing of fibers while having strength, flexibility, and shape freedom and moldability that allow the shape to be arbitrarily changed according to the design of an elevator system.SOLUTION: An elevator main rope is constituted of a core part provided in a longer direction of the main rope, a high-strength part provided around the core part, a support part provided around the high-strength part to keep the shape of the high-strength part, and a cover part made of resin material to cover the whole main rope. The high-strength part is formed of load-bearing filaments made of high-strength fibers.SELECTED DRAWING: Figure 2

Description

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

  Elevators generally have a structure in which vertically movable carriages and counterweights are connected by elevator ropes via a hoist.

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

As an example of a main rope for elevators, for example, a rope defined by JIS G 3525 is common. A rope is a structure which arranges a plurality of strands around a core made of synthetic fibers or natural fibers and twists them. The strands have a structure in which a bundle of steel wires is twisted.
In addition, viscous oil or grease-like oil is applied to the surface of the rope in order to suppress friction between the steel wires and wear and to maintain the lubricity between the rope and the sheave. Similarly, oil is also disposed in the core, and when tension is applied to the rope, a force acts in the direction in which the steel wire strand compresses the core, 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 area of the main rope 4 and the sheave 3 becomes high, the oil on the surface of the main rope 4 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 movement of the main rope 4 drives the car 1 and the counterweight 2 to raise and lower the elevator (lifting of the car 1).

  The material and structure of the main ropes are important design items as they affect the lift performance of the elevator system. Specifically, the minimum bending radius of the main cord, weight, strength, power transmission performance, etc. may be mentioned. For example, the minimum bending radius (flexing 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 line with the rope bending, resulting in an increase in the volume occupied by the entire elevator system and a complicated layout.

  Here, in the high floor elevator system, it is necessary to make the main ropes longer according to the hoistway. In addition to the carriage and the balance weight, the main cord itself also needs its own heavy weight, so it is necessary to use a thick main cord in order to support these. As a result, the entire elevator system becomes heavy, and the energy efficiency associated with lifting and lowering is greatly reduced. Therefore, in addition to the strength to support tension, the main cord is required to apply a lightweight material that reduces appropriate flexibility and system load.

  As an example of the prior art that meets 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 separately in the width direction of the belt shaped rope and has high frictional resistance. It has a structure embedded in the coating.

JP, 2015-74871, A

The problem to be solved by the prior art, such as the rope described in Patent Document 1, is a structure in which the load bearing members are disposed in the width direction, so that the possible structure of the main rope is limited.
The belt shape mainly used in the prior art main cord 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, the roping at the time of arranging in the hoistway is restricted.
The problem to be solved in the main ropes is, for example, shape freedom and shapeability, in which the shape can be arbitrarily changed according to the design of the elevator system, for example, a main rope having a structure adaptable to complicated roping It is to provide excellent main ropes.

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 has a structure in which the fibers are in direct contact with each other. Have. For this reason, breakage may occur due to rubbing of fibers due to bending or the like, resulting in a decrease in strength.
The problem to be separately solved in the main cord is to provide a highly reliable main cord which can prevent breakage of fibers due to rubbing in advance.

  As described above, the prior art can not provide a main cord sufficiently satisfying the above-mentioned problems, and further improvement is desired.

In view of the above circumstances, the object of the present invention is to reduce the system load, and the strength, the flexibility, the shape freedom can be arbitrarily changed according to the design of the elevator system, the formability, the friction between fibers An object of the present invention is to provide a main cord having excellent reliability capable of preventing disconnection. Another object of the present invention is to provide an elevator using this main rope.

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

  The present invention relates to a main rope for elevators, and includes a core portion disposed in the longitudinal direction of the main rope, a high strength portion disposed around the core portion, and a high strength portion disposed around the high strength portion. The high-strength portion is formed of a load-bearing filament made of a high-strength fiber, which is composed of a support portion that maintains the shape of the portion and a coating portion made of a resin material that covers the entire main cord.

  The elevator of the present invention comprises a main cord, a hoisting machine for winding the main cord, a balance weight connected to the main cord, and a weight connected to the main cord and driven by the main cord being hoisted. , And the elevator main rope of the present invention is used for the main rope.

  According to the above-described elevator main cord of the present invention, the high-strength portion formed of the load-bearing filament made of high-strength fiber is disposed around the core portion, whereby the main cord using the conventional steel wire As compared with the above, it is possible to obtain a main rope having a high load carrying capacity with respect to the rope weight, and also to achieve high strength, flexibility, and reduce system load. In addition, the shape of the main cord, which was conventionally limited to the belt shape, can be arbitrarily changed according to the design of the elevator system, and the structure has excellent shape freedom and formability of the main cord. Furthermore, the breakage due to rubbing of the fibers can be suppressed, and the reliability of the high strength portion can be significantly improved.

  Further, according to the elevator of the present invention, by using the elevator main cord according to the present invention, an elevator contributing to downsizing and energy saving is provided with minimizing an increase in the weight of the system even for higher floors. can do.

  Problems, configurations, and effects other than those described above will be apparent from the description of the embodiments below.

It is a schematic diagram of an example of a traction type | mold elevator. It is a cross-sectional schematic diagram of embodiment of the main rope for elevators of this invention. It is a cross-sectional schematic diagram of embodiment of the main rope for elevators of this invention. It is a cross-sectional schematic diagram of embodiment of the main rope for elevators of this invention. A-D It is a formation method and schematic diagram (side view and sectional view) of the 1st example of the elevator main rope of the present invention. A-D It is a formation method and schematic diagram (side view and sectional view) of the 2nd example of the elevator main rope of the present invention. A to D are a method of forming a third embodiment of the elevator main rope of the present invention and a schematic view (side view and cross-sectional view). FIGS. 7A to 7D are a method of forming a fourth embodiment of the elevator main rope according to the present invention and a schematic view (side view and sectional view). A to C are a method of forming a fifth embodiment of the elevator main rope of the present invention and a schematic view (side view and cross-sectional view). A to D are a method of forming a sixth embodiment of the elevator main rope of the present invention and a schematic view (side view and sectional view).

  Hereinafter, embodiments according to the present invention will be described using text or drawings. However, the structures, materials, and other specific numerical values and the like shown in the present invention are not limited to the embodiments described here, and can be appropriately combined or improved without departing from the scope of the present invention. Further, elements not directly related to the present invention are not shown.

The elevator main rope of the present invention has a core portion disposed in the longitudinal direction of the main rope, a high strength portion disposed around the core portion, and a high strength portion disposed around the high strength portion. It consists of a supporting part to maintain and a covering part which consists of a resin material which covers the whole of the main cord.
And the high strength portion of the elevator main rope of the present invention is formed of a load bearing filament made of high strength fiber.
Although each part which comprises the main rope for elevators of this invention is a structure which became independent, respectively, you may combine the high strength part and the support part by the same structure.

  The elevator according to the present invention comprises a main rope, a hoisting machine for winding the main rope, a balance weight connected to the main rope, and a car connected to the main rope and driven by the main rope being hoisted, And use the elevator main rope of the present invention as the main rope.

Here, embodiments showing various shapes of the elevator main rope of the present invention are respectively shown in schematic sectional views of FIGS.
In each embodiment shown in FIGS. 2 to 4, the main cord is constituted by four parts of the core portion (7, 7 ′, 7 ′ ′), the high strength portion 8, the support portion 9, and the covering portion 10.

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

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

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

  Hereinafter, the structure of each part of the elevator main rope of this invention is demonstrated in detail.

(Core part of main cord)
The core portion of the main cord of the present invention is disposed in the center of the main cord and disposed in the longitudinal direction of the main cord as shown in FIGS. That is, the core portion has an elongated structure formed extending in a direction parallel to the longitudinal direction of the main cord.

The main rope is required to have a function to support the shape of the main rope appropriately for bending and in-plane load, for example, in a contact portion with a sheave connected to the hoist, and has appropriate flexibility and compressive rigidity It is important to have
Also, the shape of the main cord is substantially determined by the structure of the core portion. For this reason, the core of the core is such that the cross section of the contact portion with the sheave of the main cord is in contact with a circle (a perfect circle / elliptic) or a flat surface, and the shape of the main cord is a preferable shape according Select the shape of the part.

At this time, by designing the elevator system to allow the deformation of the main rope within a certain range, it is possible to further increase the design freedom of the core portion.
For example, by forming the core portion in a round bar shape as shown in FIG. 2, it becomes a rope-like main cord having no bending anisotropy.
For example, a belt-like main cord can be obtained by forming the core portion into a rectangular bar-like shape as shown in FIG.
For example, by forming the core portion in a hollow cylindrical shape as shown in FIG. 4, the main cord becomes elliptical or flat only at the contact part with the sheave, thereby improving the power transmission capability between the sheave and the main cord. It becomes possible.
Also, in order to make the contact surface of the main cord with the sheave flat, select a rectangular shape as shown in Fig. 3 or a polygonal pillar shape such as triangular pole, pentagonal note, hexagonal note etc. Also good. A main cord having a flat outer surface can be configured by covering the core portion with a rectangular or polygonal prism shape and covering the core portion with a constant material thickness.

  As described above, since the shape of the main cord is substantially determined by the structure of the core part, by selecting the shape of the core part, the shape of the main cord can be arbitrarily changed according to the design of the elevator system It becomes possible. Thereby, the main rope of the structure excellent in shape freedom and formability is realizable.

As a material of a core part, in the range with which the performance of a core part is filled, it can use without restriction in particular. Specific examples of the material include polyurethane resin, silicone resin, polyethylene resin, polypropylene resin, polybutene resin, thermoplastic elastomer containing the above resin, natural rubber, synthetic rubber and the like. And the core part which consists of material selected from at least 1 type or more from these materials is comprised. In addition to the above-described resin alone, in order to impart appropriate flexibility and compressive rigidity, depending on the application, a mixture of the above-described resins (such as a polymer blend) or a composite material containing inorganic substances What disperse | distributed the filler etc. can be used. In addition, high-strength fibers may be included as long as the performance of the core portion is satisfied. Examples of high strength fibers include carbon fibers, para-aramid fibers, ultrahigh molecular weight polyethylene fibers, polyarylate fibers, polybenzoxazole fibers and the like. Alternatively, a UD (Uni-Directional) tape may be used, in which high-strength fibers such as carbon fibers are arranged in one direction and resin is impregnated to form a tape.
By using the above-described material for the core portion, the weight of the main cord can be reduced as compared to the conventional main cord using a steel wire.

(High strength part of main cord)
The high strength portion of the main cord of the present invention is disposed around the core of the main cord and extends in the longitudinal direction of the main cord, as shown in FIGS.
The high strength portion of the main cord is formed of load-bearing filaments made of high-strength fibers, and a plurality of load-bearing filaments parallel to the longitudinal direction of the main cord, or a plurality of load-bearing filaments twisted together, It is composed of
Furthermore, a solid or liquid lubricant is disposed on the surface or inside of the load bearing filament.
The structure of the high strength part is not particularly limited as long as the strength and reliability necessary for the main cord are secured.
An example of a more specific configuration of the high strength portion will be described in detail by the embodiment of the main cord 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 longitudinal direction of the main cord can be supported by the load-bearing filament of the high strength portion.
As described above, since the tension in the longitudinal direction of the main cord is supported by the load bearing filaments of the high strength portion, the resin material or the like described above can be used for the core portion. And, by using a resin material or the like for the core portion, it is possible to reduce the weight of the main cord as compared to the main cord using a 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, polyarylate fibers and polybenzoxazole fibers, and more preferably It is carbon fiber. In addition, a high strength fiber such as a carbon fiber may be disposed in one direction, and a UD tape may be appropriately used by impregnating a resin and molding it into a tape shape.
Carbon fibers are excellent in tensile strength properties and tensile rigidity, and are suitable as main ropes for elevators.
On the other hand, since carbon fibers are weak to the force from the surface direction, rubbing, etc., reliability can be greatly improved by closely arranging the fibers and covering the surface with a sufficient lubricant.

The lubricant covering the load-bearing filament can be used without particular limitation, as long as it does not chemically interact or deteriorate with the core portion or the high strength fiber. Concretely, it is a mixed oil appropriately blended with mineral oil (paraffin oil, naphthenic oil), synthetic ester oil, synthetic ether oil, synthetic hydrocarbon oil, silicone oil, etc. or grease based on these, wax, etc. It is a solid lubricant at normal temperature.
The method of arranging these lubricants on the load-bearing filaments is not particularly limited, but a method of impregnating and arranging the load-bearing filaments in advance, a method of arranging the load-bearing filaments on the main cord and then immersing in the lubricant There is.

  Further, instead of the lubricating oil, a prepreg or the like in which a resin material having a self-lubricating property such as a fluorine resin is compounded can also be used as appropriate.

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

(Support section of main cord)
The support portion of the main cord of the present invention is disposed around the high strength portion as shown in FIGS. 2 to 4 and supports the high strength portion.
The support portion is intended to bring the high strength portion into close contact with the core portion to maintain, bind or fix the shape of the high strength portion.
As such a support part, the structure wound helically around the high strength part is mentioned, for example.

  Since the main cord of the present invention has a structure that bears tension at the high strength portion, the support portion itself does not have to have high strength, but the high strength portion is preferred because it is integrated with the high strength portion. It is desirable that the structure has a similar strength and can support a high strength portion.

  The material, shape, and the like of the support portion are not particularly limited, but it is preferable to use a tape-like, film-like or string-like structure in consideration of processability at the time of forming the main cord. Moreover, in order to make fixation by a support part stronger, it is also possible to form an adhesion layer in the surface of a support part, and to use a semi-hardened thing (prepreg) for a support part.

As a material of the support portion, it is desirable to use a resin or high strength fiber as a base material.
Examples of the resin material include polyurethane resin, silicone resin, polyethylene resin, polypropylene resin, polybutene resin, thermoplastic elastomer containing the above resin, natural rubber, synthetic rubber and the like. Moreover, the reliability of winding support can be improved more by using the heat-fusion tape and film which made these the main ingredients. In addition, a high strength fiber such as a carbon fiber may be disposed in one direction, and a UD tape may be appropriately used by impregnating a resin and molding it into a tape shape.
Examples of high strength fibers include carbon fibers, para-aramid fibers, ultrahigh molecular weight polyethylene fibers, polyarylate fibers, polybenzoxazole fibers and the like.

  At this time, if it is possible to have sufficient strength against tension, it is also possible to use the support portion as a high strength portion. As described above, when the supporting portion also serves as the high strength portion, the high strength portion / supporting portion is formed of the load-bearing filament structure made of high strength fibers, for example, the high strength portion / supporting portion is provided around the core portion. Wind in one or more directions. At this time, a solid or liquid lubricant is disposed on the surface or in the inside of the load-bearing filament structure made of high-strength fibers.

(Cover of main cord)
The covering portion of the main cord of the present invention is made of a resin material, and has a structure capable of covering the entire main cord as shown in FIGS.
By covering the whole of the main cord with a covering part made of a resin material, the effect of the support part can be further enhanced, and stabilization of the main cord shape, good protection of the inner layer part, and through the surface of the main cord Good power transmission capability can be realized.

As a material of a covering part, in the range with which the performance of a covering part is filled, it can use without restriction in particular. Specific examples of the material include polyurethane resin, silicone resin, polyethylene resin, polypropylene resin, polybutene resin, thermoplastic elastomer containing the above resin, natural rubber, synthetic rubber and the like. And the coating | coated part which consists of material selected from at least 1 type or more from these materials is comprised.
In addition to the above-described resin alone, in order to impart appropriate flexibility and compressive rigidity, depending on the application, a mixture of the above-described resins (such as a polymer blend) or a composite material containing inorganic substances What disperse | distributed the filler etc. can be used.
By constructing the covering portion using the above-described material, the protection of the inner layer portion and the power transmission through the surface of the main cord can be favorably performed.

  In addition, as a material of the above-mentioned coating | coated part, the material similar to the material mentioned as a material of the core part is mentioned. Therefore, although it is possible to use the same material as the material of the core portion and the material of the covering portion, it is not necessary to necessarily use the same material. For each of the core portion and the covering portion, it is also possible to adopt more appropriate different materials depending on the difference in the required characteristics, the molding method, and the like. For example, it is possible to use different kinds of resins in the core portion and the coating portion, to make the mixing ratio of the resin of the polymer blend different, to make the kind and mixing ratio of the inorganic substance of the composite material different, etc. .

  In addition, it is desirable that the covering portion occupy a larger portion in the width direction of the cross section of the main cord throughout the main cord. Preferably, the covering portion is formed thicker than the combined thickness of the high strength portion and the support portion. More preferably, it occupies 50% or more of the cross direction of the cross section of the main cord.

(Elevator with main cable)
The elevator main rope constituted by the above-mentioned core part to the covering part can be applied to the elevator main rope as an example is shown in FIG. 1.

At this time, the main cord needs to be structured to support the tension between the elevator system and the balance weight of the elevator system, and the elastic modulus of the main cord is desirably 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.
As the main cord has a sufficient elastic modulus in this way, it becomes a main cord having a flexibility and reliability of the main cord and having a structure adaptable to complicated roping. As a result, it is possible to provide a main rope excellent in shape freedom and formability, which can be arbitrarily changed in shape according to the design of the elevator system. In particular, the feature of the present invention is that the service life is long and the bending radius can be reduced.

Next, elevators formed by means of a vertically movable elevator carriage and a roping for hanging a car including at least one rope will be described. The roping includes at least one, preferably a plurality of main cords shown in the present invention. The performance of the main rope can realize an elevator with good power transmission performance and high lifting capacity.
In addition, according to the configuration of the main cord of the present invention (in particular, the structure and material of each part), the main cord can be driven by a driving wheel with a small radius since the main cord has good bending characteristics. This makes it possible to apply a sheave having a high rotational speed, if necessary, to improve the design freedom of the entire system.

  In addition, the arrangement of the roping can be easily formed with a high degree of freedom also for the roping path in which the sheave of the elevator and / or the diverting pulley is wound one or more times. Further, by using the main cord having a round bar core portion, the restriction in the bending direction is eliminated, and the counterweight can be suspended by free roping.

  Next, as an embodiment of the present invention, a more specific example of the elevator main cord of the present invention will be shown together with the method of forming the main cord. Each of these examples is a main cord having flexibility and reliability of the main cord, and having a structure adaptable to complicated roping.

  In each drawing of the embodiment, the left drawing is a side view of the left half and a sectional view taken along a plane along the central axis of the right half, and the right drawing is a sectional view of a plane perpendicular to the central axis And

(First embodiment)
A first embodiment of the elevator main rope according to 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 to the longitudinal direction of the main cord.

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

Next, as shown to FIG. 5B, a high strength part is formed by arrange | positioning the load-bearing filament 11 parallel to the length direction of a main cord around the core part 7. As shown in FIG. A lubricant (high viscosity lubricating oil, grease or wax) is disposed on the surface of the load bearing filament 11.
Then, as partially shown at the left end of the side view in FIG. 5B, the load bearing filament in the longitudinal direction in the drawing is wound so that the load bearing filament 11 parallel to the longitudinal direction of the main cord is not separated. It is desirable to bundle. The load carrying filaments in the longitudinal direction do not have to be as dense as the load carrying filaments in the longitudinal direction.
In the right view of FIG. 5B, the load resistance parallel to the longitudinal direction of the main cord is indicated by a point, and the illustration of the load resistant filament in the longitudinal direction is omitted.

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

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

In the structure of the main cord of the present embodiment, the same load-bearing filaments 11 are not twisted together, but all arranged in parallel to the core portion 7. Most of the load-bearing filaments 11 are fiber bundles arranged in the longitudinal direction of the main cord, and it becomes possible to arrange high strength portions at high density.
In addition, the lubricant disposed on the surface of the load-bearing filament 11 plays a role of temporarily fixing the filaments in the process of forming the main cord, and the structure of the main cord is firmly supported by the support portion 9 .

Second Embodiment
A second embodiment of the elevator main rope according to 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 constitute a high strength portion.

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

  Next, a plurality of stranded load-bearing filaments are formed as one unit 12. And as shown to FIG. 6B, the high strength part 13 is comprised by arrange | positioning multiple this units 12 and covering the circumference | surroundings of the core part 7. FIG. In FIG. 6B and later, the detailed illustration of the unit 12 is omitted.

  As an example of a plurality of stranded load-bearing filament structures that make up the unit 12, it is desirable to have a stranded structure around the central filament. In this structure, the central filament has a round structure, and at least one layer of stranded load-bearing filaments contacts the central filament and has a dense structure. And each unit 12 is extended and arranged by the longitudinal direction of the main cord.

  In the present embodiment, the lubricant is disposed on the entire load-bearing filament of the high strength portion. Furthermore, 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-like or film-like structure around the high-strength portion 13 composed of the unit 12 of load-bearing filament.

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

  In the construction of the main cord of the present embodiment, the unit 12 in which the load-bearing filaments are twisted is disposed extending in the longitudinal direction of the main cord, and therefore exhibits high tensile rigidity and strength against the extension of the main cord. .

  In this embodiment, since the number of fiber bundles arranged in the longitudinal direction of the main cord is smaller than in the first embodiment, it is necessary to make the cross-sectional area of the high strength portion 13 wide. By twisting together to form the unit 12, the productivity at the time of formation of the main cord is increased, and the shape stability of the main cord is also excellent.

Third Embodiment
A third embodiment of the elevator main rope according to the present invention is shown in FIGS. 7A to 7D.
In this embodiment, instead of twisting load bearing filaments, the load bearing filaments are woven from the longitudinal and transverse directions to the core portion to form a layered structure.

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

  Next, as shown in FIG. 7B, with respect to the core portion 7, the load-carrying filaments 14 extending respectively in the direction parallel to the longitudinal direction of the main cord and in the direction perpendicular to the longitudinal direction of the main cord are woven and perpendicular to each other The high strength portion is constituted by a layered structure which is plain weaved in the vertical and horizontal directions. In each of the cross-sectional views after FIG. 7B, detailed illustration of the high strength portion is omitted.

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

  Any method can be used as a method of producing a layered structure in which the high-strength portions of the present embodiment are woven and the load-bearing filaments 14 are woven in the longitudinal and lateral directions. For example, a method of weaving one by one directly on the surface of the core portion 7 or a method of separately preparing one woven beforehand and covering the core portion 7 can be used.

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

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

  In the structure of the main cord of the present embodiment, since the load bearing filaments 14 are directly formed on the surface of the core portion 7, the structure has high density and excellent dimensional stability. In addition, since the load-bearing filaments 14 are structurally supported, even when part of the load-bearing filaments 14 is broken, it is difficult for the strength to be reduced. Therefore, the reliability of long-term use of the main cord is enhanced.

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

  First, as shown in FIG. 8A, a round bar-shaped core 7 is prepared 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 load bearing filaments 15 extending obliquely in the lower right direction and the upper right direction in the figure are woven obliquely 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 disposed on or in the surface of the layered structure of the high strength portion.

  Any method can be used as a method of producing a layered structure in which the load-bearing filaments 15 are woven in two directions obliquely crossing each other, which constitute 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 preparing one woven beforehand and covering the core portion 7 can be used.

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

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

  In the structure of the main cord of the present embodiment, since the load bearing filaments 15 are formed directly on the surface of the core portion 7, as in the third embodiment, the structure has high density and excellent dimensional stability. In addition, since the load-bearing filaments 15 are structurally supported, even when part of the load-bearing filaments 15 is broken, it is difficult for the strength to be reduced. Therefore, the reliability of long-term use of the main cord is enhanced.

Fifth Embodiment
The 5th Example of the elevator main rope of this invention is shown to FIG. 9A-FIG. 9C.
In this embodiment, instead of separately providing the high strength portion and the support portion, the support portion also supports the tension to serve also as the high strength portion.

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

  Next, as shown in FIG. 9B, a tape-like or film-like structure formed of load-bearing filaments consisting of high-strength fibers is spirally wound around the core 7 to form a layered structure having a high height. The strength portion / support portion 16 is configured. In addition, 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 disposed on the surface or inside of the layered structure of the high strength portion / support portion 16.

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

  In the structure of the present embodiment, the strength in the longitudinal direction of the main cord is reduced as compared to the case where the high strength portion and the support portion are separately provided, but by combining the high strength portion with the support portion, high strength is achieved. Since the formation process of the part can be omitted, the effect of saving the process can be obtained.

Sixth Embodiment
A sixth embodiment of the elevator main rope according to the present invention is shown in FIGS. 10A to 10DC.
In this embodiment, as in the fifth embodiment, instead of separately providing the high strength portion and the support portion, the support portion also supports the tension to serve also as the high strength portion. This is an example in which the high strength portion / support portion is wound from the direction.

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

  Next, as shown in FIG. 10B, a tape-like or film-like structure formed of load-bearing filaments made of high-strength fibers is spirally wound around the core 7 to increase the layer structure height. The strength portion / support portion 16 is configured. In the present embodiment, the high strength portion and support portion 16 is given the same reference numeral as that of the fifth embodiment, but the thickness of the high strength portion and support portion 16 is the high strength portion and support of the fifth embodiment. The thickness of the portion 16 is about half. In addition, 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, around the high strength portion / support portion 16 in the direction diagonally intersecting with the winding direction of the high strength portion / support portion 16 by the load-bearing filaments made of high strength fibers. The formed tape-like or film-like structure is spirally wound to constitute a second high strength and supporting part 17 of 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 addition, in each cross-sectional view after FIG. 10C, detailed illustration of the 2nd high strength part and support part 17 is omitted.

  In the present embodiment, a solid or liquid lubricant is disposed on the surface or inside of the layered structure of each 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 formed of load-bearing filaments made of high-strength fibers. Different materials may be used.

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

  In the structure of the present embodiment, the strength in the longitudinal direction of the main cord is reduced as compared to the case where the high strength portion and the support portion are separately provided, but by combining the high strength portion with the support portion, high strength is achieved. Since the formation process of the part can be omitted, the effect of saving the process can be obtained.

  Each of the above-described embodiments is an example that clearly shows the feature of each structure, and the configurations of the plurality of embodiments can be used in appropriate combination.

  In each of the examples shown in FIGS. 5 to 10 described above, the round bar-shaped core portion 7 similar to that of the embodiment of FIG. 2 is used. However, the square bar or cylindrical shape similar to FIG. Core portions of other shapes such as core portions may be used. Even if other shapes of core portions are used, high strength portions, support portions and covering portions may be formed around the core portions to construct the elevator main rope of the present invention as in each embodiment. it can.

Moreover, the elevator main rope of a structure shown above can be used for the elevator shown in FIG.
The main rope is fixed to the top of the hoistway at one end, and the rope is pulled in the order of a car, a sheave connected to a hoist, a sheave fixed to the top, a balancing weight, and both ends ride and balance It has a fixed structure at the top of the weight. This is a traction elevator having a mechanism in which a main rope is driven through a sheave by rotation of a hoist, and a counterweight and a car are driven.

Since the main rope according to the present invention is a particularly lightweight and high strength main rope, it exhibits performance in miniaturizing an elevator or elevator system itself of an upper floor.
Moreover, since the main cord itself is covered with the covering part which consists of resin materials, it is effective also in lifetime improvement of the main cord. Therefore, it is possible to reduce the frequency of maintenance and the number of work processes required for maintenance, to suppress the wear of an elevator rope or the like, and to extend the life of the elevator.

  In addition, each above-mentioned Example is concretely described in order to help an understanding of this invention, and this invention is not limited to providing all the demonstrated structures. For example, part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Furthermore, with respect to a part of the configuration of each embodiment, it is possible to delete, add to other configurations, and add other configurations.

1 car, 2 counterweights, 3 sheaves, 4 main ropes, 5 pulleys, 6 hoistways, 7 cores (round bar), 7 'core (square bar), 7' 'core (cylindrical 8) High strength part, 9 support part, 10 coating part, 11 load bearing filament, 12 (of a stranded load bearing filament) unit, 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 (10)

The main cable for the elevator,
A core portion disposed in the longitudinal direction of the main cord;
A high strength portion disposed around the core portion;
A support portion disposed around the high strength portion to maintain the shape of the high strength portion;
And a covering portion made of a resin material covering the entire main cord,
The main rope for elevators, wherein the high strength portion is formed of a load bearing filament made of high strength fibers.   The elevator main rope according to claim 1, wherein the core portion has a round bar shape and has a solid structure or a hollow long structure.   The elevator main rope according to claim 1, wherein the core portion has a rectangular or polygonal columnar long structure and has a flat outer side surface covered by the covering portion.   The high strength portion has a structure in which the load bearing filaments are arranged in parallel in the longitudinal direction of the main cord, and a solid or liquid lubricant is disposed on the surface or in the inside of the load bearing filaments. The elevator main rope according to claim 1, characterized in that   The high strength portion has a structure in which a plurality of the load-bearing filaments twisted together is disposed, and a solid or liquid lubricant is disposed on the surface or in the inside of the load-bearing filament. An elevator main cord according to Item 1.   The high strength portion has a structure of the load-bearing filament in which fiber bundles are woven into each other, and a solid or liquid lubricant is disposed on the surface or inside of the structure. Main cord for elevator according to 1.   The structure according to claim 1, wherein the supporting portion has a structure of the load-bearing filament that also serves as the high strength portion, and is configured to be wound around the core portion in one direction or a plurality of directions. Main cord for elevators.   The core portion is made of a material selected from at least one or more selected from polyurethane resin, silicone resin, polyethylene resin, polypropylene resin, polybutene resin, thermoplastic elastomer containing these as a component, natural rubber, and synthetic rubber; The elevator main rope according to claim 1, which is made of a composite material containing a resin mixture, an inorganic substance and the like.   The covering portion is made of a material selected from at least one or more of polyurethane resin, silicone resin, polyethylene resin, polypropylene resin, polybutene resin, thermoplastic elastomer containing these as a component, natural rubber, and synthetic rubber. The elevator main rope according to claim 1, which is made of a composite material containing a resin mixture, an inorganic substance and the like. Main cord,
A hoisting machine for winding up the main cord;
A balance weight connected to the main cord,
A vehicle connected to the main cord and driven by the main cord being wound up;
The elevator main rope according to any one of claims 1 to 9 is used for the main rope.

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