JPWO2006061888A1 - Elevator rope and elevator equipment - Google Patents

Abstract

In the elevator rope, a plurality of core rope strands are twisted around the outer periphery of the core strand. These core rope strands constitute a core rope strand assembly. The core rope has a core rope main body and a resin core rope cover that covers the core rope main body. Each core rope strand has a core rope strand main body. The core rope strand assembly is covered with a resin core rope covering. A plurality of outer layer ropes are twisted around the outer periphery of the core rope covering. These outer layer strands constitute an outer layer strand assembly. The outer layer lasso assembly is covered with a resin outer layer covering.

Description

  The present invention relates to an elevator rope provided with a resin outer layer covering on the outer peripheral portion and an elevator apparatus using the rope.

  In a conventional elevator apparatus, a sheave having a diameter of 40 times or more the rope diameter is used in order to prevent early wear and disconnection of the rope. Therefore, in order to reduce the diameter of the sheave, it is necessary to reduce the diameter of the rope. However, when the rope diameter is reduced, there is a risk that the car will easily vibrate due to the load fluctuation of the luggage loaded on the car and the passengers getting on and off, and the vibration of the rope on the sheave may be transmitted to the car. Moreover, the number of ropes increases and the configuration of the elevator apparatus becomes complicated.

  On the other hand, there has been proposed an elevator in which a rope covering is provided on the outer peripheral portion of the entire rope and a strand covering the rope is also provided (for example, see Patent Document 1).

JP 2001-262482 A

  However, in the sectional structure of the conventional elevator rope as described above, the mounting density of the steel strands is not sufficient, and further improvement of the effective sectional area is desired.

  The present invention has been made to solve the above-described problems, and provides an elevator rope capable of improving the packaging density of the strands and the effective sectional area, and an elevator apparatus using the same. The purpose is to obtain.

An elevator rope according to the present invention includes a core rope having a core rope main body formed by twisting a plurality of steel strands, and a resin core rope covering body covering the core rope main body, a plurality of ropes. A core rope strand assembly composed of a plurality of core rope strands each having a core rope strand main body formed by twisting steel strands of steel core and having a core rope center around the core rope strand , A resin-made core rope covering body that covers the core rope strand assembly, and a plurality of strands that are twisted on the outer periphery of the core rope covering body, each having an outer layer strand main body formed by twisting a plurality of steel strands. An outer layer rope assembly composed of the outer layer strands of the book and a resin outer layer covering body that covers the outer layer strand assembly are provided.
Moreover, the elevator apparatus by this invention has a drive device main body and the drive sheave rotated by a drive device main body, The drive device arrange | positioned at the lower part of a hoistway, The multiple wound around the drive sheave Elevator rope, car and counterweight suspended in the hoistway in a 1: 1 roping system by the elevator rope, and the elevator rope from the drive sheave placed in the upper part of the hoistway Each elevator rope is provided with a plurality of return wheels that lead to the weight, and each of the ropes for the elevator is a core rope body formed by twisting a plurality of steel strands, and a resin core rope cover that covers the core rope body A core rope having a core rope rope body formed by twisting a plurality of steel strands, and a plurality of core rope elements twisted around the core rope around the core rope A core rope sheath assembly, a resin core rope sheath covering the core rope strand assembly, and an outer layer strand main body formed by twisting a plurality of steel strands. An outer layer cord assembly composed of a plurality of outer layer strands twisted around the outer periphery of the outer layer, and a resin outer layer coating body that covers the outer layer strand cord, and the diameter of at least one return wheel is for an elevator It is 20 times or less of the diameter of the rope.

It is sectional drawing of the rope for elevators by Embodiment 1 of this invention. It is a side view which fractures | ruptures and shows the rope for elevators of FIG. 1 for every layer. 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 top view which shows the elevator apparatus by Embodiment 5 of this invention. It is a front view which shows the elevator apparatus of FIG.

Preferred embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a cross-sectional view of an elevator rope according to Embodiment 1 of the present invention, and FIG. 2 is a side view showing the elevator rope of FIG.
In the figure, the elevator rope has a core rope 1, an outer layer rope assembly 2 provided on the outer periphery of the core rope 1, and a resin outer layer cover 3 that covers the outer layer rope assembly 2. ing. The core rope 1 includes a core rope 4, a core rope rope assembly 5 provided on the outer periphery of the core rope 4, and a resin core rope covering body 6 that covers the core rope rope assembly 5. Have.

  The core rope 4 includes a core rope main body 7 formed by twisting a plurality of steel strands, and a resin core rope cover 8 that covers the core rope main body 7.

  The core rope strand assembly 5 is constituted by a plurality (here, 6) of core rope strands 9. In this example, each core rope strand 9 is constituted only by a core rope strand main body formed by twisting a plurality of steel strands. The core rope cord 9 is twisted around the core cord 4 around the core cord 4.

  The outer layer rope assembly 2 is composed of a plurality (here, 12) of outer layer strands 10. In this example, each outer layer strand 10 is constituted only by an outer layer strand main body formed by twisting a plurality of steel strands. In addition, the outer layer strands 10 are twisted around the outer periphery of the core rope sheath 6.

  The core rope cover 8 and the core rope cover 6 are made of, for example, polyethylene resin. The outer layer covering 3 is made of a high friction resin material having a friction coefficient of 0.2 or more, for example, a polyurethane resin.

  The cross-sectional structure of the core rope main body 7 is a Warrington type (JIS G 3525), but may be a seal type, a Warrington seal type, or a filler type. The cross-sectional structures of the core rope main body 7, the core rope rope 8 (core rope rope main body) and the outer layer rope rope 9 (outer layer rope main body) are the same. Moreover, the core rope main body 7, the core rope rope 9 and the outer layer rope 10 are formed by parallel twisting steel strands into three or more layers.

  The rope diameter excluding the outer layer covering 3, that is, the outer diameter of the outer layer cord assembly 2 is 20 times or more the diameter of the steel wire. Moreover, the diameter of all the steel strands is set to 1/400 or less of the diameter of the sheave to be applied, that is, the sheave (or pulley) around which the elevator rope is wound.

  As shown in FIG. 2, the twisting direction of the outer rope strand 10 is opposite to the twisting direction of the core rope strand 9. The twist direction of the steel wire of the core rope main body 7 is also opposite to the twist direction of the core rope rope 9.

  In such an elevator rope, the mounting density of the steel wires can be improved and the effective cross-sectional area can be improved as compared with the conventional rope. Moreover, since the lasso (main body) 7, 9, 10 of each layer is separated by the coverings 8, 6, 3, the steel strands are not in direct contact with each other, and the steel strands are worn away. Can be prevented. Furthermore, the bending stress generated in the steel strand can be relaxed by the buffering action of the coverings 8, 6, and 3.

  Moreover, since the core rope main body 7, the core rope rope 9 and the outer layer rope 10 are formed by parallel twisting steel strands into three or more layers, the steel strands are in line contact with each other. Thus, the gap between the strands can be reduced, the mounting density of the steel strands can be further improved, and the wear damage of the steel strands can be further reduced.

  Furthermore, by using 12 or more outer layer strands 10, the diameter δ of the steel strands of the outer layer strands 10 can be reduced without making the outer layer strands 10 complicated, and the outer layer covering body The relationship with the rope diameter d excluding 3 can be d / δ ≧ 20, and the generated bending stress can be reduced. Furthermore, since the diameter of the core rope 1 can be increased to some extent, the steel wire in the core rope 1 is not extremely thin, and the strength reduction due to wear of the steel wire can be suppressed.

  Furthermore, since the diameter of all the steel strands is set to 1/400 or less of the diameter of the sheave to be applied, the bending fatigue life can be sufficiently ensured. The diameter of the sheave can be a minimum of 200 mm with respect to the rope diameter of 10 mm. Therefore, the life of the fatigue life can be extended or the diameter of the sheave can be reduced.

  Also, by using one core rope 4, 6 core rope ropes 9, and 12 outer layer ropes 10, the diameters of all the ropes 4, 9, 10 are made substantially equal. Can do. Therefore, if the thicknesses of the coverings 8, 6, and 3 are adjusted, the cross-sectional structures of the core rope main body 7, core rope rope main body, and outer layer rope main body can be made the same, and the entire rope can be manufactured. Can be easily.

  Furthermore, the internal rotational torque can be balanced by twisting the core rope cord 9 in the opposite direction to the core cord body 7 and twisting the outer layer cord 10 in the opposite direction to the core rope cord 9. The untwisting torque of the entire rope can be reduced.

  Furthermore, since the outer layer covering 3 is arranged on the outermost periphery, wear on the sheave side can also be prevented, and the degree of freedom in selecting the strands of the outer layer rope 10 and the material of the sheave can be improved. it can. Therefore, the overall strength can be further increased, and the sheave can be configured at low cost.

In addition, since the outer layer covering 3 in contact with the driving sheave is made of a high friction resin material, even if the diameter of the driving sheave is reduced, sufficient driving force transmission efficiency can be ensured. Therefore, it is necessary to increase the weight of the car in order to increase the frictional force between the elevator rope and the drive sheave, or to add a guide wheel to increase the winding angle of the elevator rope around the sheave. In addition, the configuration of the elevator apparatus is not complicated.
Here, the polyurethane resin can be freely selected from soft to hard, but it is preferable to use a hard polyurethane resin of 90 degrees or more in order to ensure wear resistance against slight slip on the sheave surface. . Furthermore, in order to prevent hydrolysis that occurs in the environment of use, an ether-based resin is preferable to an ester-based resin.

Furthermore, the bending resistance can be reduced by selecting a material that can easily slip when the elevator rope is bent by a sheave as the material of the core rope cover 8 and the core rope cover 6. Furthermore, the core rope covering body 8 and the core rope covering body 6 require hardness that is not crushed between steel strands. As such a material, a low friction and hard polyethylene material is suitable.
Further, the core rope covering body 8 and the core rope covering body 6 do not require a large coefficient of friction as compared with the outer layer covering body 3, and further, the bending due to the sheave is not large, so that it is necessary to always have excellent elongation characteristics. And not. Therefore, a resin such as nylon, silicon, polypropylene, or polyvinyl chloride may be used as a material for the core rope cover 8 and the core rope cover 6.

Embodiment 2. FIG.
3 is a sectional view of an elevator rope according to Embodiment 2 of the present invention. In the figure, a core rope strand 9 includes a core rope strand main body 11 formed by twisting a plurality of steel strands, and a resin core rope strand rope covering 12 covering the core rope strand rope body 11. have. Further, the outer layer rope 10 has an outer layer rope main body 13 formed by twisting a plurality of steel strands and a resin outer layer rope covering body 14 covering the outer layer rope main body 13. . The core rope strand covering 12 and the outer layer strand covering 14 are made of the same material as the core rope sheath 8 and the core rope sheath 6, for example, a polyethylene resin. Other configurations are the same as those in the first embodiment.

  In such an elevator rope, since the coverings 8, 12, and 14 are provided on the outer circumferences of all the strands 4, 9, and 10, the steel strands of the same layer come into contact with each other in the manufacturing stage. Can be more reliably prevented, and wear and damage of the steel wire can be prevented.

Embodiment 3 FIG.
Next, FIG. 4 is a sectional view of an elevator rope according to Embodiment 3 of the present invention. In the figure, the outer layer strand 10 is constituted only by an outer layer strand main body formed by twisting a plurality of steel strands. In the outer layer rope main body, the cross section of the steel strand is modified by compressing the outer layer rope main body from the outer periphery. Other configurations are the same as those in the second embodiment.

In such an elevator rope, when the distance between the adjacent outer rope strands 10 is small, even if the outer rope strands 10 come into contact with each other, the contact pressure is reduced. In addition, the mounting density of the steel strands of the outer layer strands 10 can be improved.
In this way, the cross-sectional structures of the strands 4, 9, and 10 of each layer may be different from each other.

Embodiment 4 FIG.
5 is a sectional view of an elevator rope according to Embodiment 4 of the present invention. In the figure, like the first embodiment, the outer layer rope 10 is constituted only by an outer layer rope main body formed by twisting a plurality of steel strands. Moreover, in the core rope main body 7 and the core rope strand main body 11, the cross section of the steel strand is deformed by compressing the rope main bodies 7 and 11 from the outer periphery. Other configurations are the same as those in the second embodiment.

  In such an elevator rope, since the cross sections of the steel strands of the core rope main body 7 and the core rope cord main body 11 are modified, the mounting density of the steel strands can also be improved.

Embodiment 5 FIG.
6 is a plan view showing an elevator apparatus according to Embodiment 5 of the present invention, and FIG. 7 is a front view showing the elevator apparatus of FIG. In the hoistway 21, a pair of car guide rails 22a and 22b and a pair of counterweight guide rails 23a and 23b are installed. The car 24 is raised and lowered in the hoistway 21 along the car guide rails 22a and 22b. The counterweight 25 is raised and lowered in the hoistway 21 along the counterweight guide rails 23a and 23b. The counterweight 25 is disposed so as to face the back surface of the car 24 when positioned at the same height as the car 24.

  A driving device 26 that raises and lowers the car 24 and the counterweight 25 is installed in the lower part of the hoistway 21. The drive device 26 includes a drive device main body 27 including a motor and a drive sheave 28 rotated by the drive device main body 27. The drive device 26 also includes a brake (not shown) that brakes the rotation of the drive sheave 28. Further, as the driving device 26, a thin hoisting machine having an axial dimension smaller than an outer diameter dimension in a direction perpendicular to the axial direction is used.

  The drive device 26 is disposed between the side surface of the car 24 on the vertical projection plane and the hoistway wall 21a facing the side surface. Further, the drive device 26 is arranged so that the rotation shaft of the drive sheave 28 is parallel and horizontal to the width direction of the car 24.

  A main rope group 30 is wound around the drive sheave 28. The car 24 and the counterweight 25 are suspended in the hoistway 21 by the main rope group 30 by a 1: 1 roping method. The main rope group 30 includes a plurality of first elevator ropes 31 and a plurality of second elevator ropes 32. Each of the elevator ropes 31 and 32 has the same configuration as that of any one of the first to fourth embodiments.

  First and second rope connection portions 33 and 34 are provided at lower ends of both ends of the car 24 in the width direction. Each first elevator rope 31 has a first end connected to the first rope connecting portion 33 and a second end connected to the upper portion of the counterweight 25. Each second elevator rope 32 has a third end connected to the second rope connecting portion 34 and a fourth end connected to the upper portion of the counterweight 25.

  In the upper part in the hoistway 21, first to third car side return wheels 35 to 37 for guiding the elevator ropes 31 and 32 from the drive sheave 28 to the car 24, and the elevator ropes 31 and 37 from the drive sheave 28, A counterweight return wheel 38 that guides 32 to the counterweight 25 is provided.

  The first elevator rope 31 is wound around the first car side return wheel 35, the second car side return wheel 36, the drive sheave 28, and the counterweight side return wheel 38 in order from the first end side. It has been. The second elevator rope 32 is wound around the third car side return wheel 37, the drive sheave 28, and the counterweight side return wheel 38 in this order from the third end side. That is, the first and second elevator ropes 31 and 32 are distributed from the drive sheave 28 to the second and third car-side return wheels 36 and 37 that are not parallel to each other.

  The first and second car-side return wheels 35, 36 and the counterweight-side return wheel 38 are arranged so that their rotational axes are parallel and horizontal to the depth direction of the car 24. The third car-side return wheel 37 is arranged so that its rotation shaft is parallel and horizontal to the width direction of the car 24. The return wheels 35 to 38 are arranged outside the area of the car 24 on the vertical projection plane, that is, arranged so as not to overlap the car 24.

  At least one of the return wheels 35 to 38, here, the diameter of the return wheels 35 and 36 is 20 times or less than the diameter of the elevator ropes 31 and 32.

  The first and second rope connecting portions 33 and 34 are arranged such that a straight line connecting them on the vertical projection plane passes through the center of gravity of the car 24 or the vicinity thereof. For this reason, the 1st rope connection part 33 is arranged behind the car guide rail 22a, and the 2nd rope connection part 34 is arranged ahead of the car guide rail 22b. Thereby, the cage | basket | car 24 is suspended substantially in the gravity center position.

In such an elevator apparatus, since the elevator ropes 31 and 32 having the same configuration as in any of the first to fourth embodiments are used, the diameter of the return wheels 35 to 38 can be reduced. Specifically, the diameter of the return wheels 35 and 36 can be reduced to about 20 times the diameter of the elevator ropes 31 and 32. Thereby, the return wheels 35 and 36 can be arranged outside the region of the car 24 without increasing the area of the hoistway 21 on the vertical projection plane. Therefore, when the car 24 moves to the uppermost part in the hoistway 21, the car 24 does not interfere with the return wheels 35 and 36, and the upper space in the hoistway 21 can be reduced. Further, since the diameter of the drive sheave 28 can be reduced, the load torque acting on the drive device 26 can be reduced, and the drive device 26 can be downsized.

Claims (11)

A core rope having a core rope main body formed by twisting a plurality of steel strands, and a resin core rope cover covering the core rope main body,
A core rope composed of a plurality of core rope strands each having a core rope strand main body formed by twisting a plurality of steel strands and being twisted around the core strand around the outer periphery of the core strand Lasso assembly,
A resin core rope covering for covering the core rope strand assembly,
An outer layer strand assembly composed of a plurality of outer layer strands each having an outer layer strand main body formed by twisting a plurality of steel strands and twisted around the outer periphery of the core rope covering body, and the outer layer An elevator rope having a resin outer layer covering covering a rope assembly.   The elevator rope according to claim 1, wherein the core rope main body, the core rope main rope main body, and the outer layer main rope main body are formed by parallel twisting steel strands into three or more layers.   The elevator rope according to claim 1, wherein twelve or more outer layer cords are used.   2. The elevator rope according to claim 1, wherein an outer diameter of the outer layer rope assembly is 20 times or more of a diameter of the steel strand.   The elevator rope according to claim 1, wherein the diameter of the steel wire is set to 1/400 or less of the diameter of the sheave to be applied.   One core cord, six core rope cords, and twelve outer layer cords are used. The core cord main body, the core rope cord main body, and the outer layer cord rope main body. The elevator rope according to claim 1, wherein the cross-sectional structures are the same.   2. The elevator rope according to claim 1, wherein the core rope strand further includes a resin core rope strand covering covering the core rope strand main body.   The elevator rope according to claim 1, wherein the outer layer rope has a resin outer layer rope covering body that covers the outer layer rope main body.   In at least one of the core rope main body, the core rope main rope main body, and the outer layer main rope main body, the cross section of the steel strand is deformed by compressing the core main body from the outer periphery. The elevator rope according to claim 1.   The elevator rope according to claim 1, wherein a twist direction of the outer layer strand is opposite to a twist direction of the core rope strand. A driving device having a driving device main body and a driving sheave rotated by the driving device main body, and disposed at a lower portion of the hoistway;
A plurality of elevator ropes wound around the drive sheave;
A car and a counterweight suspended in the hoistway in a 1: 1 roping manner by the elevator rope, and an elevator rope from the drive sheave disposed at the upper part of the hoistway. It has a plurality of return wheels that lead to the counterweight,
Each of the above elevator ropes
A core rope having a core rope main body formed by twisting a plurality of steel strands, and a resin core rope cover covering the core rope main body,
A core rope composed of a plurality of core rope strands each having a core rope strand main body formed by twisting a plurality of steel strands and being twisted around the core strand around the outer periphery of the core strand Lasso assembly,
A resin core rope covering for covering the core rope strand assembly,
An outer layer strand assembly composed of a plurality of outer layer strands each having an outer layer strand main body formed by twisting a plurality of steel strands and twisted around the outer periphery of the core rope covering body, and the outer layer It is equipped with a resin outer cover that covers the rope assembly,
The diameter of the at least 1 said return wheel is an elevator apparatus which is 20 times or less of the diameter of the said rope for elevators.

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