WO2011070648A1

WO2011070648A1 - Rope for elevator

Info

Publication number: WO2011070648A1
Application number: PCT/JP2009/070529
Authority: WO
Inventors: 厚光井; 篤志船田
Original assignee: 三菱電機株式会社
Priority date: 2009-12-08
Filing date: 2009-12-08
Publication date: 2011-06-16
Also published as: KR20120070606A; CN102639424A; EP2511219A1; JPWO2011070648A1

Abstract

The disclosed rope for an elevator has: a core rope; a plurality of outer-layer strands; and a resin outer-layer coating. The core rope has: one steel core strand; a resin core strand coating that coats the outer periphery of the core strand; a core rope strand assembly comprising a plurality of steel core rope strands provided to the outer periphery of the core strand coating; and a resin core rope coating provided to the outer periphery of the core rope strand assembly. The outer-layer coating is bonded to the outer-layer strands. The core strand and the core rope strands have a three-layered structure comprising two layers of wire bundled on the outer periphery of a central wire. The outer-layer strands have a two-layered structure comprising one layer of wire bundled on the outer periphery of a central wire.

Description

Elevator rope

The present invention relates to an elevator rope in which a plurality of steel strands and a plurality of layers of resin coverings are combined.

In conventional elevator ropes, a plurality of inner layer strands are arranged outside the core rope formed by twisting a plurality of core strands, and a plurality of outer layer strands are arranged outside the inner layer strands. . In addition, a resin core rope covering is disposed between the core rope and the inner layer cord, and a resin inner layer covering is disposed between the inner layer cord and the outer layer cord, outside the outer layer cord. A resin outer layer covering is disposed (for example, see Patent Document 1).

Japanese Patent No. 4108607

In the conventional elevator rope as described above, since the core rope formed by twisting the core rope is arranged at the center, a process of twisting the core rope is necessary, which takes time for manufacturing. In addition, the cross-sectional shape of the core rope, which is formed by twisting the strands, is relatively easy to collapse with respect to the external force, and the force concentrates on the center of the rope when wound around the sheave. May collapse and the cross-sectional shape of the entire elevator rope may also collapse.

The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain an elevator rope that can be easily manufactured and that is difficult to deform the cross-sectional shape. .

The elevator rope according to the present invention is provided on one steel core rope, a resin core rope cover coated on the outer periphery of the core rope, and an outer periphery of the core rope cover. A core rope having a core rope strand assembly composed of a plurality of steel core rope strands and a resin core rope sheath provided on the outer periphery of the core rope strand assembly, and a core rope sheath An outer layer cord assembly comprising a plurality of steel outer layer cords provided on the outer circumference, and a resin outer layer covering provided on the outer circumference of the outer layer cord rope, the core cord and the core rope cord The rope has a three-layer structure in which two layers of strands are bundled on the outer periphery of the central strand, and the outer layer cord has a two-layer structure in which one layer of strands is bundled on the outer periphery of the central strand.

Since the elevator rope of the present invention uses only one core rope, the process of twisting the rope can be reduced and the manufacture can be facilitated. Moreover, since the core rope cord is not directly twisted on the outer circumference of the core rope, but provided on the outer circumference of the core rope sheath, the cross-sectional shape of the core rope can be made difficult to deform.

It is sectional drawing of the rope for elevators by Embodiment 1 of this invention. It is sectional drawing of the rope for elevators by Embodiment 2 of this invention. It is sectional drawing of the rope for elevators by Embodiment 3 of this invention. It is sectional drawing of the rope for elevators by Embodiment 4 of this invention. It is a side view which shows an example of the elevator apparatus with which the rope for elevators of

Embodiment

1, 2, 3 or 4 is applied.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a cross-sectional view of an elevator rope according to Embodiment 1 of the present invention. In the figure, one steel core rope 1 is disposed at the center of the elevator rope. On the outer periphery of the core rope 1, a resin core rope cover 2 is provided. A plurality of (here, 8) steel core rope cords 3 are twisted around the outer circumference of the core cord sheath 2.

A core rope sheath 5 made of resin is provided on the outer periphery of the core rope strand 4 composed of eight core rope strands 3 and the core rope sheath 2. The core rope 6 includes a core rope 1, a core rope cover 2, a core rope rope 3, and a core rope cover 5.

A plurality of (20 in this case) steel outer layer ropes 7 are twisted around the outer periphery of the core rope sheath 5. A resin outer layer covering 9 is provided on the outer peripheries of the outer layer rope assembly 8 and the core rope covering 5 made up of 20 outer layer ropes 7. The outer layer cord 7 and the outer layer covering body 9 are bonded with an adhesive.

All the ropes including the core rope 1, the core rope rope 3 and the outer layer rope 7 are compressed (plastically processed) from the outer periphery by a die at the time of manufacture, and the cross-sectional shape of those strands is made irregular. Yes.

The core rope 1 and the core rope rope 3 have a three-layer structure in which two layers of strands are bundled around the center strand. Moreover, the cross-sectional structure of the core rope 1 and the core rope rope 3 is a seal type. Further, the twist lengths of the two layers of the core rope 1 and the core rope rope 3 are equal. That is, the core rope 1 and the core rope rope 3 are constituted by parallel twists. The outer layer rope 7 has a two-layer structure in which one layer of strands is bundled around the center strand.

Since the material of the core rope cover 2 and the core rope cover 5 needs to maintain the pressure from the core rope rope 3 and the outer layer rope 7, for example, a certain degree of hardness such as polyethylene or polypropylene Resin having is used. Moreover, the core rope covering body 2 and the core rope covering body 5 are comprised by resin bridge | crosslinked by mixing a crosslinking agent.

Furthermore, the core rope covering body 2 and the core rope covering body 5 increase the flexibility as an elevator rope and reduce the loss that occurs when bent by a sheave. good.

Thus, as the material of the core rope covering body 2 and the core rope covering body 5, a material that is harder than the material of the outer layer covering body 9 and has a low friction coefficient with respect to the same metal material is suitable. Furthermore, since the core rope cover 2 and the core rope cover 5 are slipped between the core rope 1, the core rope rope 3 and the outer layer rope 7, it is preferable that they have excellent wear resistance. It is.

Since the outer layer covering 9 needs to secure the traction capability with the sheave, it is made of a resin having a friction coefficient of 0.2 or more with respect to the sheave and having sufficient wear resistance, for example, polyurethane. Moreover, the outer layer strand 7 is comprised by resin bridge | crosslinked by mixing a crosslinking agent.

As shown in FIG. 1, it is preferable that the core rope cover 2 and the core rope cover 5 enter between the adjacent core rope strands 3 and are in contact with each other as shown in FIG. . Further, it is preferable that the core rope covering body 5 and the outer layer covering body 9 enter between the adjacent outer layer strands 7 and are in contact with each other as shown in FIG.

In such an elevator rope, since only one core rope 1 is used, tension is applied during use, and when the load is applied from the core rope rope 3 to the core rope 1, the elevator rope is difficult to be deformed. The cross-sectional shape of the entire rope can be stabilized, the number of steps for twisting the strands can be reduced, and manufacturing can be facilitated. Moreover, since the core rope cord 3 is not twisted directly on the outer circumference of the core cord rope 1 but twisted on the outer circumference of the core cord sheath 2, the cross-sectional shape of the core rope 6 can be made difficult to deform. This also stabilizes the cross-sectional shape of the entire elevator rope.

Furthermore, since all the strands including the core strand 1, the core rope strand 3 and the outer layer strand 7 are not in direct contact with other strands, wear damage due to contact between the strands is prevented, and the elevator rope Long life can be achieved.

Furthermore, the outer layer covering 9 needs to be bonded to the outer layer rope 7 in order to generate traction with the sheave, and before the outer layer covering 9 is bonded to the outer layer rope 7, It is necessary to sufficiently clean the dirt and oil adhering during the manufacture of the lasso 7. At this time, if the structure of the outer layer rope 7 is complicated, the inside of the outer layer rope 7 cannot be sufficiently cleaned. On the other hand, in Embodiment 1, since the core rope 1 and the core rope rope 3 have a three-layer structure and the outer layer rope 7 has a two-layer structure, the outer layer element is secured while ensuring sufficient strength. The rope 7 can be washed sufficiently and easily, and the outer layer covering 9 can be firmly adhered to the outer layer cord 7.

Moreover, since the cross-sectional shape of the strands of the core rope 1, the core rope rope 3, and the outer layer rope 7 is modified, the effective cross-sectional area is smaller than that of the strand not subjected to the deforming of the diameter. Can be increased.

Furthermore, since the core rope covering body 2 and the core rope covering body 5 are made of a crosslinked resin material, the use in a high temperature environment and the temperature rise due to the continuous action of bending, The durability can be improved and the life can be extended.

Furthermore, since the outer cover body 9 is also made of a crosslinked resin material, durability is increased and the life is increased with respect to temperature rise due to continuous use of bending and bending in a high temperature environment. Can be achieved. Moreover, strength reduction can be prevented against temperature rise due to slip between the sheave and the elevator rope during emergency braking, and sufficient deceleration performance can be maintained.

Moreover, since the cross-sectional structure of the core rope 1 and the core rope rope 3 is a seal type, and the strands of the core rope 1 and the core rope strand 3 are twisted in parallel, the strands are in line contact with each other. Thus, the wear damage inside the core rope 1 and the core rope rope 3 can be reduced, and the gap between the strands can be reduced to increase the effective sectional area.

Here, if the number of outer layer strands 7 is increased, the wire diameter constituting the outer layer strands 7 can be reduced with the same cross-sectional structure, so that the life against bending fatigue can be extended. However, as the cross-sectional area ratio of the core rope 6 increases, in order to ensure the necessary flexibility (bending fatigue), the cross-sectional structure of the core rope 6 is multilayered, or the strands included in the core rope 6 are It becomes necessary to increase the number of layers, the configuration becomes complicated, the number of strands and strands increases, and the manufacturing takes time and the manufacturing cost increases.

Conversely, when the number of outer layer ropes 7 is decreased, the local surface pressure acting on the outer layer covering 9 from the outer layer ropes 7 when the sheave groove and the elevator rope come into contact with each other increases. It becomes easy to damage the lasso 7. Further, in order to ensure the necessary flexibility, it is necessary to make the cross-sectional structure of the outer layer rope 7 more multi-layered, which makes the configuration complicated and reduces the packing density in the entire elevator rope, that is, the effective cross-sectional area. Decrease.

Also, if it is attempted to ensure the effective cross-sectional area, that is, the rope diameter, with the same wire diameter, it is necessary to increase the number of wires and increase the number of wire layers.

On the other hand, in reality, the number of outer layer strands 7 should be 2 to 2.5 times the number of strands (core strand 1 and core rope strand 3) included in the core rope 6. Thus, it is more flexible than conventional ropes for elevators, can suppress the pressure acting on the outer layer covering body 9 from the outer layer rope 7 at the time of contact with the sheave groove, and can reduce the manufacturing cost. .

Embodiment 2. FIG.
2 is a sectional view of an elevator rope according to Embodiment 2 of the present invention. In the first embodiment, all of the strands are deformed, but in the second embodiment, the core cord 1 is not deformed. Other configurations are the same as those in the first embodiment.

Here, when a breakage occurs in a part of the strands of the core rope 1 due to, for example, non-uniformity of the strand tension at the time of manufacture, the core strand 1 exists alone in the center, Since the wire is not twisted and the force for restraining the broken strand is weak, a phenomenon in which the broken strand protrudes from the outer periphery of the core strand 1 is likely to occur. Moreover, since the core rope 1 is comprised combining the strands from which a diameter differs, a strand with a small diameter tends to cut preferentially with respect to the pressure which acts from the outside. Thus, when a part of the strand of the core rope 1 is broken and the cross-sectional shape of the core rope 1 is broken, the cross-sectional shape of the entire elevator rope may be broken.

On the other hand, in the second embodiment, when only the core rope 1 is not deformed, when the strand of the core rope 1 is broken, the broken core wire is deformed. Absorbing in the range of the inner gap, the collapse of the cross-sectional shape of the core rope 1 can be suppressed. Moreover, compared with the case where a deforming process is performed, it is possible to make uniform the wire tension at the time of manufacture, and it is possible to suppress early disconnection of the wire.

Embodiment 3 FIG.
3 is a sectional view of an elevator rope according to Embodiment 3 of the present invention. In the third embodiment, the number of core rope cords 3 is six. Accordingly, the number of outer layer cords 7 was set to 16. Other basic cross-sectional structures are the same as those in the first embodiment.

In this way, by setting the number of core rope strands 3 to 6, the diameters of all the strands (core strand 1 and core rope strand 3) included in the core rope 6 can be made almost the same. The diameters of the strands that make up the strands can be made almost the same.

Here, in a conventional elevator rope of a type that does not use a resin coating, breakage occurs preferentially at the contact portion with the sheave, and breakage proceeds from that portion. On the other hand, in the elevator rope having the outer layer covering 9, the outer layer cord 7 is not in contact with the sheave and the cords are not in contact with each other, and the factor that determines the fatigue life is bent by the sheave. Therefore, the bending stress generated in the strands is dominant.

In the elevator rope according to the third embodiment, since the diameters of the strands constituting the core rope 1 and the core rope rope 3 are almost the same, it is possible to prevent damage from proceeding early at a specific portion due to bending stress. The life of the entire elevator rope can be extended. Further, in order to obtain such an effect more reliably, the diameter of the thickest strand in the core rope 1, the diameter of the thickest strand in the core rope strand 3, and the thickest strand in the outer layer strand 7 It is preferable that the difference from the diameter of the wire is almost eliminated, specifically within 0.1 mm.

In addition to the diameter of the strands, the difference in diameters of all the strands including the core strand 1, the core rope strand 3 and the outer layer strand 7 is almost eliminated. Flexibility can be improved, and the apparatus can be unified in manufacturing.

In particular, in the third embodiment, the outer layer strand 7 is configured by 16 × 7 (16 outer layer strands 7 each composed of seven strands), and the core rope 6 is configured by 6 × S (19) + S. (19) (6 core rope ropes 3 with 19 strands arranged in a seal shape and 1 core rope 1 with 19 strands arranged in a seal shape).

This makes it possible to make the maximum diameters of the strands of the core rope 1, the core rope strand 3 and the outer layer strand 7 almost the same while suppressing the number of strands of the entire elevator rope to 245. As a result, the fatigue resistance can be increased, the mounting density, that is, the effective area can be improved, and the manufacturing cost can be suppressed. Thus, it is preferable that the total number of all the strands included in all the strands including the core strand 1, the core rope strand 3 and the outer layer strand 7 is 250 or less.

Moreover, by configuring as described above, the rope diameter excluding the outer layer covering 9 can be 8 mm, and the diameters of all the strands can be 0.5 mm or less. Thereby, the diameter of a sheave can be set to 200 mm at the minimum, and can be set to 400 or more of a strand diameter, and sufficient bending fatigue life can be ensured.

Furthermore, since the elevator rope of Embodiment 3 has a high mounting density and high strand strength, the rope diameter of 8 mm corresponds to the rope diameter of an elevator rope of a type that does not use any resin coating. Since the minimum diameter of the sheave when the rope diameter is 10 mm is 400 mm, the diameter of the sheave can be halved.

Embodiment 4 FIG.
Next, FIG. 4 is a sectional view of an elevator rope according to Embodiment 4 of the present invention. In the fourth embodiment, the core rope 1 is not deformed. Other configurations are the same as those of the third embodiment.

According to such a configuration, as in the second embodiment, the collapse of the cross-sectional shape of the core rope 1 can be suppressed, and early breakage of the strands can be suppressed.

Here, FIG. 5 is a side view showing an example of an elevator apparatus to which the elevator rope of the first, second, third, or fourth embodiment is applied. In the figure, a machine room 12 is provided in the upper part of the hoistway 11. A machine table 13 is installed in the machine room 12. A hoisting machine 14 is supported on the machine base 13. The hoisting machine 14 includes a drive sheave 15 and a hoisting machine main body 16. The hoisting machine body 16 includes a hoisting machine motor that rotates the driving sheave 15 and a hoisting machine brake that brakes the rotation of the driving sheave 15.

A baffle 17 is attached to the machine base 13. A plurality of elevator ropes 18 as suspension means are wound around the drive sheave 15 and the deflecting wheel 17. A portion closer to the counterweight 10 than the drive sheave 15 of the elevator rope 18 is wound around the baffle wheel 17.

A car 19 is suspended from one end of the elevator rope 18. That is, the car 19 is suspended in the hoistway 11 by the elevator rope 18 on one side of the drive sheave 15. A counterweight 20 is suspended from the other end of the elevator rope 18. That is, the counterweight 20 is suspended by the elevator rope 18 on the other side of the drive sheave 15.

In the hoistway 11, a pair of car guide rails 21 that guide the raising and lowering of the car 19 and a pair of counterweight guide rails 22 that guide the raising and lowering of the counterweight 20 are installed. The car 19 is equipped with an emergency stop device 23 that engages with the car guide rail 21 to stop the car 19 in an emergency.

The type of the elevator apparatus to which the elevator rope of the present invention is applied is not limited to the type shown in FIG. For example, the present invention can be applied to a machine room-less elevator, a 2: 1 roping type elevator device, a multi-car type elevator device, a double deck elevator, or the like.
The elevator rope of the present invention can also be applied to ropes other than the rope for suspending the car 19, such as a compen- sion rope and a covered rope.

Claims

One steel core rope, a resin core rope sheath coated on the outer periphery of the core rope, and a plurality of steel cores provided on the outer periphery of the core rope sheath A core rope having a core rope strand assembly composed of a rope strand, and a resin core rope covering provided on the outer periphery of the core rope strand assembly;
An outer layer rope assembly composed of a plurality of steel outer layer strands provided on the outer periphery of the core rope sheath, and a resin provided on the outer periphery of the outer layer strand assembly and bonded to the outer layer strand The outer layer covering made of
The core rope and the core rope rope have a three-layer structure in which two layers of strands are bundled around the outer periphery of a central strand.
The outer layer rope is an elevator rope having a two-layer structure in which one strand is bundled around the outer periphery of a central strand.
All the strands including the said core rope, the said core rope strand, and the said outer layer strand are compressed from the outer periphery at the time of manufacture, and the cross-sectional shape of those strands is deformed. Elevator rope.
Of all the strands including the core rope, the core rope strand and the outer layer strand, the strands other than the core strand are compressed from the outer periphery at the time of manufacture, and the cross-sectional shape of those strands The elevator rope according to claim 1, wherein is modified.
The elevator rope according to claim 1, wherein the material of the core rope covering body and the core rope covering body is harder than the material of the outer layer covering body and has a lower coefficient of friction against the same metal material.
The elevator rope according to claim 1, wherein the core rope cover and the core rope cover are made of a crosslinked resin material.
The elevator rope according to claim 1, wherein the outer layer covering is made of a crosslinked resin material.
The elevator rope according to claim 1, wherein a cross-sectional structure of the core rope and the core rope rope is a seal type, and strands of the core rope and the core rope rope are twisted in parallel.
The elevator rope according to claim 1, wherein a difference in diameters of all the ropes including the core rope, the core rope rope, and the outer layer rope is within 1 mm.
The difference between the maximum diameter of the core rope strand, the maximum diameter of the core rope strand, and the maximum diameter of the outer strand strand is within 0.1 mm. Elevator rope.
The elevator rope according to claim 1, wherein the total number of all strands contained in all the strands including the core strand, the core rope strand and the outer layer strand is 250 or less.