JP5463931B2 - Hoisting rope for elevator - Google Patents

Description

  The present invention relates to a hoisting rope used in an elevator.

  The elevator car is suspended in a hoistway by a hoisting rope, and is driven by a frictional force between the hoisting rope and the driving sheave by being wound around the driving sheave of the hoisting machine. . In order to increase the driving force due to friction and to extend the bending fatigue life of each sheave such as a drive sheave, the hoisting rope used in an elevator, for example, twists a number of small steel strands. A structure is generally adopted in which the combined strands are formed in multiple layers, the resin is filled between the layers, and the outer surface is coated with the resin.

FIG. 12 is a diagram schematically showing a configuration of a conventional elevator hoisting rope described in Patent Documents 1 and 2 below, and FIG. 13 is a cross-sectional view of the conventional elevator hoisting rope shown in FIG. It is.
The main part of the conventional hoisting rope 23 includes, for example, a core cord 24, a core coating 25, an inner layer cord 26, an inner layer coating 27, an outer layer cord 28, and an outer layer coating 29.

The inner layer strands 26 and the outer layer strands 28 are twisted in different directions so that the internal twist does not become non-uniform due to the overall elongation or untwisting.
Further, when each inner layer strand 26 and each outer layer strand 28 freely move in the longitudinal direction, the load balance acting on each strand is lost, and as a result, the life of the hoisting rope 23 is shortened. Therefore, for example, the inner layer cord 26 and the inner layer coating 27, the inner layer coating 27 and the outer layer cord 28, and the outer layer cord 28 and the outer layer coating 29 are respectively integrated using a predetermined adhesive or the like. The shape of the rope 23 is stabilized and the load is evenly loaded.

Japanese Patent No. 4096879 Japanese Patent No. 4108607

  The conventional hoisting rope having the above-described configuration has a drawback in that it exhibits high rigidity like a hard bar because the inner strands and the resin are fixed by an adhesive. That is, the conventional hoisting rope is integrated as a whole, so that the flexibility is impaired, and as a result, the resistance (bending loss) for bending the hoisting rope with a drive sheave or the like increases. There was a problem that the capacity of the electric motor for driving the car had to be increased.

  In order to reduce the bending loss, it is conceivable that the hoists of the hoisting rope are not fixed with resin. However, if each hoist freely moves within the hoisting rope, a part of the hoisting rope (element The wire) may break the outer layer coating and jump to the outer surface, and such a configuration cannot be adopted.

  The present invention has been made to solve the above-described problems, and the object thereof is to reliably prevent the strands constituting the strand from projecting to the outer surface and to occur in a drive sheave or the like. It is providing the hoisting rope for elevators which can reduce significantly the bending loss to do.

Elevator hoisting rope according to the present invention is a elevator hoisting ropes for suspending the car elevator hoistway, inner coating of polyurethane resin for coating a plurality of inner - layer rope and inner - layer rope has the door, Ri by that inner coating is bonded to the Naisoko rope by adhesive applied to Naisoko rope, and an inner layer body inner coating and is integrated with a plurality of Naisoko rope, inner layer It is provided along the length of the inner layer body so as to surround the periphery of the body, and has a plurality of outer layer cords and an outer layer coating made of polyurethane resin covering the outer layer cords, and by an adhesive applied to the outer layer cord the outer layer coating Ri by to be adhered to the Gaisoko rope, comprising a plurality of outer stator rope and the outer layer coating and is integrated outer member, the outer layer body, to the inner body, in the longitudinal direction is movable, Naisoko rope, a plurality of Made from those twisted manufacturing of wire, Gaisoko rope is made of those twisted wires made of a plurality of steel.

  If it is the hoisting rope for elevators concerning this invention, it can prevent reliably the strand which comprises a strand from projecting to an outer surface, and can greatly reduce the bending loss which generate | occur | produces in a drive sheave etc. become able to.

It is a figure which shows the whole structure of an elevator. It is sectional drawing which shows the hoisting rope for elevators in Embodiment 1 of this invention. It is sectional drawing of the core rope of the hoisting rope for elevators shown in FIG. It is sectional drawing of the inner layer strand of the hoisting rope for elevators shown in FIG. It is sectional drawing of the outer layer strand of the hoisting rope for elevators shown in FIG. It is sectional drawing of the state except the outer layer body of the hoisting rope for elevators shown in FIG. It is sectional drawing which shows the hoisting rope for elevators in Embodiment 2 of this invention. It is sectional drawing which shows the principal part of the hoisting rope for elevators in Embodiment 2 of this invention. It is sectional drawing which shows the hoisting rope for elevators in Embodiment 3 of this invention. It is sectional drawing of the outer layer strand of the hoisting rope for elevators shown in FIG. It is sectional drawing which shows the principal part of the hoisting rope for elevators in Embodiment 3 of this invention. It is the figure which showed typically the structure of the conventional hoisting rope for elevators. It is sectional drawing of the conventional hoisting rope for elevators shown in FIG.

  In order to explain the present invention in more detail, it will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
FIG. 1 is a diagram showing an overall configuration of an elevator. In FIG. 1, reference numeral 1 is a car that moves up and down in the elevator hoistway, 2 is a counterweight that moves up and down in the hoistway in the opposite direction to the car 1, and 3 is a fishing bottle in the hoistway A hoisting rope 4 for suspension is a hoisting machine for driving the car 1. A part of the hoisting rope 3 is wound around the driving sheave 5 (and the deflecting sheave 6) of the hoisting machine 4, and moves in conjunction with the rotation of the driving sheave 5. That is, when the drive sheave 5 is driven by the hoisting machine 4, the car 1 (and the counterweight 2) moves up and down in the hoistway.

  The hoisting rope 3 has a specific configuration for reducing resistance (bending loss) when being bent by each sheave such as the drive sheave 5. The configuration of the hoisting rope 3 will be specifically described below with reference to FIGS.

  FIG. 2 is a cross-sectional view showing the elevator hoisting rope according to the first embodiment of the present invention, and corresponds to the AA arrow in FIG. 3 is a cross-sectional view of the core rope of the elevator hoisting rope shown in FIG. 2, FIG. 4 is a cross-sectional view of the inner strand of the elevator hoisting rope shown in FIG. 2, and FIG. 5 is the elevator shown in FIG. FIG. 6 is a cross-sectional view of the hoisting rope outer layer rope, FIG. 6 is a cross-sectional view of the elevator hoisting rope shown in FIG. 2 excluding the outer layer body.

  As shown in detail in FIGS. 2 to 6, the hoisting rope 3 includes, for example, a core rope 7, a core cover 8, an inner layer rope 9, an inner layer cover 10, an intermediate cover layer 11, and an outer layer rope 12. The outer layer coating 13 constitutes the main part.

  The core rope 7 and the core coating 8 constitute a core body, and are arranged at the center of the hoisting rope 3 along the length thereof. The core coating 8 is made of a resin such as polyethylene used as a filler, and is provided so as to cover the entire periphery of the core rope 7.

  The inner layer strands 9 and the inner layer covering 10 disposed outside the core body constitute an inner layer body. The inner layer body has an annular cross section, and is provided along the length of the hoisting rope 3 so as to cover the periphery of the core body.

  Specifically, each inner layer strand 9 is formed by twisting a large number of steel strands, and a predetermined adhesive 14 is applied to the entire outer surface. Moreover, the inner layer covering 10 that covers the inner layer rope 9 is made of a resin such as polyurethane bonded to the adhesive 14 by heat treatment, and fixes the plurality of inner layer ropes 9 wound around the core body. That is, the inner layer body configured as described above is integrated by bonding and covering a plurality of inner layer strands 9 with the inner layer covering 10 and the adhesive 14, and each inner layer strand 9 is independently disposed inside the hoisting rope 3. It is configured not to move freely.

  The outer layer cord 12 and the outer layer coating 13 disposed outside the inner layer body constitute an outer layer body. The outer layer body has an annular cross section, and is provided along the length of the hoisting rope 3 so as to surround the inner layer body with the intermediate coating layer 11 therebetween. The outer layer body is configured to be movable in the longitudinal direction with respect to the inner layer body.

Specifically, each outer layer strand 12 is formed by twisting a large number of steel strands in the same manner as the inner layer strand 9, and a predetermined adhesive 15 is applied to the entire outer surface thereof. It has been applied. The outer layer sheath 13 that covers the outer layer strand 12 is made of a resin such as polyurethane that is bonded to the adhesive 15 by heat treatment, and fixes the plurality of outer layer strands 12 twisted around the intermediate coating layer 11. That is, the outer layer body configured as described above is integrated by bonding and covering the outer layer cords 12 with the outer layer coating 13 and the adhesive 15, and each outer layer cord 12 is independently disposed inside the hoisting rope 3. It is configured not to move freely.
The outer layer coating 13 also forms the outer surface of the hoisting rope 3.

  The intermediate coating layer 11 is provided to realize the relative movement between the inner layer body and the outer layer body. The intermediate coating layer 11 is made of, for example, a predetermined resin that is not bonded by the adhesives 14 and 15. That is, the intermediate coating layer 11 is provided along the length of the hoisting rope 3 so as to cover the periphery of the inner layer body, and is disposed between the inner layer body and the outer layer body. The intermediate coating layer 11 is configured to be movable in the longitudinal direction of the hoisting rope 3 with respect to both the inner layer body and the outer layer body.

  2 and 3, the intermediate coating layer 11 is shown as a layer having a predetermined thickness in order to clarify the presence of the intermediate coating layer 11. However, the intermediate covering layer 11 is used to realize interlayer movement between the inner layer body and the outer layer body, that is, prevents the outer layer strand 12 from adhering to the inner layer covering 10 when the hoisting rope 3 is manufactured. As long as such a function can be realized, an extremely thin film (for example, a thickness of about 0.2 mm) may be used. Further, the intermediate covering layer 11 may be present at the time of manufacturing the hoisting rope 3 and is worn by use of the hoisting rope 3 after the heat treatment (reaction of each resin and adhesives 14 and 15) is completed. Even then, the characteristics of the hoisting rope 3 (for example, the slipperiness of the inner layer body and the outer layer body) are not significantly affected.

  Further, in order to improve the slipperiness between the inner layer body and the outer layer body, the intermediate coating layer 11 may be made of a resin (for example, nylon) having lower friction characteristics than the inner layer coating 10 and the outer layer coating 13. Further, in order to improve the slipperiness, the intermediate coating layer 11 may contain a coating material having lower friction characteristics than the inner layer coating 10 and the outer layer coating 13. In such a case, for example, silicon or fluorine (Teflon (registered trademark)) powder or resin, lubricating oil, or the like is used as the coating material.

  In order for the intermediate coating layer 11 to have the above function, the intermediate coating layer 11 is a material that reacts and chemically bonds with the lubricating oil, silicon, fluororesin powder, and the adhesives 14 and 15. Don't be. Moreover, the intermediate | middle coating layer 11 must have the characteristic which does not inhibit the adhesiveness, when scattered between the outer layer strand 12 and the outer layer coating 13, or it flows out. Accordingly, a chemically stable polyethylene resin is suitable as the resin constituting the intermediate coating layer 11 from the viewpoint of ease of manufacture, cost, low friction / wear resistance, and the like.

  According to the first embodiment of the present invention, it is possible to reliably prevent the strands constituting the inner layer rope 9 and the outer layer rope 12 from projecting to the outer surface of the hoisting rope 3, and the drive sheave 5 and the like. Can significantly reduce the bending loss.

  That is, in the hoisting rope 3 having the above-described configuration, the inner layer rope 9 of the inner layer body is covered with the inner layer covering 10 (and the adhesive 14), and the outer layer rope rope 12 of the outer layer body is covered with the outer layer covering 13 (and the adhesive 15). Since they are integrated with each other, the strands do not move freely inside the hoisting rope 3 and the strands do not break through the outer layer coating 13 and jump out to the outer surface. Further, since the inner layer body and the outer layer body are not bonded, when the hoisting rope 3 is wound around the drive sheave 5 or the like, an interlayer slip (displacement) occurs between the inner layer body and the outer layer body. And the outer layer body are relatively displaced in the longitudinal direction according to the external force. For this reason, it becomes possible to reduce the resistance (bending loss) for bending the hoisting rope 3 with the drive sheave 5 and the like, and to reduce the capacity of the hoisting machine 4 (the electric motor) for driving the car 1. Can do.

Embodiment 2. FIG.
FIG. 7 is a sectional view showing an elevator hoisting rope according to Embodiment 2 of the present invention, and FIG. 8 is a sectional view showing an essential part of the elevator hoisting rope according to Embodiment 2 of the present invention.

  As shown in detail in FIGS. 7 and 8, the hoisting rope 3 in the present embodiment has a core rope 16, a core coating 17, a second intermediate coating layer 18, an inner layer rope 9, and an inner layer coating 10. The intermediate coating layer 11, the outer layer cord 12, and the outer layer coating 13 constitute essential parts. FIG. 8 shows the configuration of the core rope 16, the core coating 17, and the second intermediate coating layer 18.

  The core rope 16 and the core coating 17 constitute a core body and are arranged along the length of the central portion of the hoisting rope 3. The core rope 16 is formed by twisting a large number of steel wires, and a predetermined adhesive 19 is applied to the entire outer surface thereof. Moreover, the core coating | cover 17 which coat | covers the core rope 16 is comprised from resin, such as a polyurethane adhere | attached on the adhesive agent 19 by heat processing. That is, the core body having the above structure is integrated by bonding and covering the central core rope 16 with the core coating 17 and the adhesive 19.

  The inner layer body arranged outside the core body is provided along the length of the hoisting rope 3 so as to surround the periphery of the core body with the second intermediate coating layer 18 interposed therebetween. Thus, it is configured to be movable in the longitudinal direction. In addition, since each structure of the inner layer strand 9, the inner layer coating 10, the intermediate coating layer 11, the outer layer strand 12 and the outer layer coating 13 is the same as that of the first embodiment, the specific description is omitted.

  The second intermediate coating layer 18 is provided to realize the relative movement between the core body and the inner layer body. The second intermediate coating layer 18 is made of, for example, a predetermined resin that is not bonded by the adhesives 19 and 14. That is, the second intermediate coating layer 18 is provided along the length of the hoisting rope 3 so as to cover the periphery of the core body, and is disposed between the core body and the inner layer body. The second intermediate coating layer 18 is configured to be movable in the longitudinal direction of the hoisting rope 3 with respect to both the core body and the inner layer body.

  Other configurations and functions relating to the second intermediate coating layer 18 are the same as those of the intermediate coating layer 11. For this reason, as the resin constituting the second intermediate coating layer 18, a chemically stable polyethylene resin is suitable from the viewpoint of ease of manufacture, cost, low friction / wear resistance, and the like.

According to Embodiment 2 of the present invention, since the core rope 16 and the core coating 17 are bonded and integrated, the core rope 16 alone does not rotate (change in twist), and the inner layer body and Interlayer slip occurs between the outer layer bodies and also between the core body and the inner layer body. For this reason, the bending loss of the hoisting rope 3 can be further reduced, and the capacity of the hoisting machine 4 (the electric motor) for driving the car 1 can be further reduced. The core rope 16 has a simple configuration, and even if a load is applied to the hoisting rope 3, the load load between the strands is unlikely to be uneven. However, by adopting the above configuration as the core body, It is possible to obtain a more stable hoisting rope 3 that is not affected by twisting back.
The other effects are the same as those of the first embodiment.

Embodiment 3 FIG.
9 is a sectional view showing an elevator hoisting rope according to Embodiment 3 of the present invention, FIG. 10 is a sectional view of an outer layer rope of the elevator hoisting rope shown in FIG. 9, and FIG. 11 is an embodiment of the present invention. It is sectional drawing which shows the principal part of the hoisting rope for elevators in 3. FIG.

  As shown in detail in FIGS. 9 to 11, the hoisting rope 3 in the present embodiment includes a core rope 7, a core cover 8, an inner layer rope 9, an inner layer cover 10, an outer layer rope 20, an outer layer. The main part is constituted by the covering 21. In addition, since each structure of the core rope 7, the core coating | cover 8, the inner layer core rope 9, and the inner layer coating | cover 10 is the same as that of Embodiment 1, detailed description is abbreviate | omitted. Further, the configuration inside the inner strand 9 may be the same as the configuration shown in FIG.

  The outer layer cords 20 and the outer layer coating 21 arranged outside the inner layer body constitute an outer layer body. The outer layer body has an annular cross section, and is provided along the length of the hoisting rope 3 so as to cover the periphery of the inner layer body. In addition, although the intermediate | middle coating layer 11 shown in FIG. 2 etc. is not provided in the hoisting rope 3 in this Embodiment, the said outer layer body is comprised so that a movement in the longitudinal direction is possible with respect to an inner layer body. ing.

  Specifically, each outer layer strand 20 is formed by twisting a large number of steel strands, and is twisted on the outer periphery of the inner layer covering 10 that covers the inner layer strand 9. That is, the outer layer cord 20 is disposed so that the inner portion thereof directly faces the inner layer coating 10, and is in a state where the inner layer coating 10 can contact the inner layer coating 10. The outer layer coating 21 that covers the outer layer cord 20 is made of a resin such as polyurethane that is bonded to the adhesive 22 by heat treatment, and fixes the plurality of outer layer cords 20 wound around the inner layer coating 10. That is, the outer layer body configured as described above is integrated by bonding and covering the outer layer cords 20 with the outer layer coating 21 and the adhesive 22, and each outer layer cord 20 alone wraps inside the hoisting rope 3. It is configured not to move freely.

  In addition, in order to enable interlayer slip between the inner layer body and the outer layer body without providing the intermediate covering layer 11 on the hoisting rope 3, in the hoisting rope 3 in the present embodiment, the adhesive 22 is made of an outer layer cord. It is applied to the portion of the 20 that contacts the outer layer coating 21 and is not applied to the portion that can contact the inner layer coating 10. In other words, the outer layer cord 20 is twisted around the inner layer coating 10 without being bonded to the inner layer coating 10.

  In order to obtain the hoisting rope 3 having such a configuration, for example, when the hoisting rope 3 is manufactured, the outer layer cord 20 is used in a bare wire state or in a state where a ground treatment for applying the adhesive 22 is applied. Wrap around the inner layer coating 10. After twisting the outer layer rope 20 with the inner layer strand 9 covered with the inner layer coating 10 as a core, the adhesive 22 is applied to the portion visible from the outside of the outer layer strand 20 and covered with the outer layer coating 21. . Then, by finally heat-treating the hoisting rope 3 in such a state, the inner layer sheath 9 and the inner layer sheath 10 and the outer layer strand 20 and the outer layer are bonded without bonding the inner layer sheath 10 and the outer layer sheath rope 20. The inner layer body and the outer layer body are formed by integrating the coating 21 with each other.

According to the third embodiment of the present invention, the same effect as in the first embodiment can be obtained without providing the intermediate covering layer 11 on the hoisting rope 3, and the bending loss generated in the drive sheave 5 and the like is greatly increased. Can be reduced.
The other configurations and effects are the same as those of the first or second embodiment.

DESCRIPTION OF SYMBOLS 1 Car 2 Balance weight 3, 23 Hoisting rope 4 Hoisting machine 5 Drive sheave 6 Warp sheave 7, 16, 24 Core rope 8, 18, 25 Core coating 9, 26 Inner core rope 10, 27 Inner sheath 11 Intermediate coating Layer 12, 20, 28 Outer layer rope 13, 21, 29 Outer layer coating 14, 15, 19, 22 Adhesive 18 Second intermediate coating layer

Claims (8)

An elevator hoisting rope for suspending an elevator car in a hoistway,
And a inner coating of polyurethane resin for covering the Naisoko rope and a plurality of inner - layer rope, that the inner coating is bonded to the Naisoko rope by adhesive applied to the Naisoko rope An inner layer body in which the plurality of inner layer cords and the inner layer covering are integrated,
It is provided along the length of the inner layer body so as to surround the inner layer body, and has a plurality of outer layer cords and an outer layer coating made of a polyurethane resin covering the outer layer cords, and is applied to the outer layer cords. Ri by the said outer coating is an adhesive that is being adhered to said Gaisoko rope, and an outer layer body in which the plurality of outer stator rope and the outer layer sheath are integrated,
With
The outer layer body is movable in the longitudinal direction with respect to the inner layer body ,
The inner layer rope is formed by twisting a plurality of steel strands,
The elevator hoisting rope, wherein the outer layer rope is formed by twisting a plurality of steel strands . A core body integrated by bonding and covering the core rope with a predetermined resin;
Further comprising
The elevator according to claim 1 , wherein the inner layer body is provided along a length of the core body so as to surround the periphery of the core body, and is movable in the longitudinal direction with respect to the core body. Hoisting rope. The Cinco rope, elevator hoisting ropes of claim 2, characterized in that it consists of those twisted wires made of a plurality of steel. An intermediate coating layer made of resin that is provided between the inner layer body and the outer layer body so as to cover the periphery of the inner layer body, and is movable in the longitudinal direction with respect to the inner layer body and the outer layer body,
The elevator hoisting rope according to any one of claims 1 to 3 , further comprising: The intermediate coating layer, an adhesive applied to said inner element rope, and, on the elevator winding according to claim 4, characterized in that it consists of not adhered resin adhesive applied to the outer layer stator rope rope. The elevator hoisting rope according to claim 4 , wherein the intermediate covering layer is made of a predetermined resin having lower friction characteristics than a polyurethane resin. The said intermediate | middle coating layer has a coating material which has a friction characteristic lower than a polyurethane resin, The hoisting rope for elevators of Claim 4 characterized by the above-mentioned. The outer layer element rope, while being positioned to face directly to the inner layer coating, said adhesive only to the portion in contact with the outer layer sheath is applied, that the adhesive portion in contact with the inner coating is not applied The hoisting rope for an elevator according to any one of claims 1 to 3 , wherein the hoisting rope is for an elevator.

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