JP2009292630A - Hoisting rope for elevator, and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hoisting rope for an elevator having a long service life and high fatigue resistance and stabilized in shape in terms of year by increasing the density of core steels and diffusing a force for fastening steel strands brought in contact with core steel strands when a load is applied. <P>SOLUTION: A rope 1 is wound around a driving sheave 2 connected to a driving motor, and an elevator cage 3 for a passenger is hoisted at one end thereof, and a balance weight 4 is hoisted in the other end. This rope 1 is constituted of a core steel 11 formed of central fiber bundles and steel strands 12 arranged at the periphery of the core steel and formed by twisting steel wires 121. The core steel 11 formed of the fiber bundles is constituted of one core strand 113 manufactured by twisting fiber bundles and arranged as a core body in a central part of the core steel and four core steel strands 112 arranged at the periphery of the core strand to form the periphery of the core steel. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an elevator hoisting rope having high fatigue resistance and capable of stabilizing the shape over time, and a method for manufacturing the same.

  As shown in FIG. 1, the elevator hoisting rope 1 is wound around a driving sheave 2 connected to a driving electric motor, and an elevator car 3 on which a passenger rides is suspended from one end of the hoisting rope 1. A counterweight 4 is suspended from the other end of the hoisting rope 1. Then, the car 3 and the counterweight 4 suspended at both ends of the hoisting rope 1 are moved up and down in the hoistway by the rotation of the driving sheave 2. Further, as shown in FIG. 2, the hoisting rope 1 for an elevator is a steel rope 12 in which a core rope 11 made of a central fiber bundle and a steel wire arranged on the outer periphery of the core rope 11 are twisted together. It consists of and.

  The configuration of the conventional elevator hoisting rope 1 is usually an 8 × S (19) component defined in JIS G 3525, and is made of natural sisal fiber or synthetic polypropylene fiber as a central core material. A core rope 11 is used. As shown in FIGS. 7 and 8, the core rope 11 has a configuration in which three core ropes 112 obtained by twisting a number of yarns 111 bundled with natural sisal fibers or synthetic polypropylene fibers are twisted, that is, This is a trivial “three-stroke” configuration, and is compressed and shaped from the outer periphery when twisted together with the eight steel strands 12 composed of steel wires 121 arranged on the outer periphery of the core rope 11. It becomes a high-density core material. Since the core rope 11 has a high density, the steel rope 12 composed of the steel wire 121 on the outer periphery can maintain the shape as a rope, and becomes a long-life hoisting rope. Further, the configuration of the core rope 11 does not change even when the diameter of the rope increases, and only the number and diameter of the yarns increase with the increase in the diameter of the rope, and the number of core ropes 112 is three. .

  A conventional method for manufacturing an elevator hoisting rope will be described. First, natural sisal fiber or synthetic polypropylene fiber is bundled and twisted to produce the yarn 111. Next, a plurality of yarns 111 are twisted together to produce a core rope cord 112. Then, three core ropes 112 are twisted to manufacture the core rope 11 (see FIG. 7). Next, eight steel strands 12 obtained by twisting steel wires 121 around the outer circumference of the core rope 11 are twisted to produce the hoisting rope 1 (see FIG. 8). At this time, the steel rope 12 is pressed to compress and shape the core rope 11 as shown in FIG. The three core ropes 112 are in a state where the apex portion in contact with the steel rope 12 is most strongly pressed, and the density increases with the compression shaping (deformation), and the core rope 11 becomes a tightly tightened rope.

  Further, as a conventional technique, a fiber rope formed by twisting a plurality of fiber strands formed by twisting a plurality of fiber bundles is arranged at the center, and a plurality of steel wires are twisted outside the fiber rope. A hybrid rope in which a protective layer is formed and a coating layer is formed around the outer side of the protective layer has been proposed (see, for example, Patent Document 1).

JP 2004-115985 A

In the conventional hoisting rope for elevators, the core rope 11 has a coreless configuration in which three core ropes 112 are twisted together, and therefore is twisted together with eight steel ropes 12 constituted by steel wires 121. In this case, since it is compressed and deformed from a place where it is easily deformed, the finished density of the core rope 11 varies, and a strong place and a weak place are created. The peak portion of the core rope 11 having the greatest deformation is deformed and increased in density as the pressing force is increased. However, if the deformation is too large, the fibers of the core rope 11 are cut and the density is not increased. There is a problem that is likely to become unstable. Also, as the rope diameter increases, the diameter of the core rope increases, so it is desirable to increase the density. However, the density of the core rope is limited and cannot be increased without darkness. In addition, if the core rope is forcibly pressed down in order to increase the density, the core rope will be worn away quickly, the steel strands will come into contact with each other, and the surface of the rope will be damaged and the strength and life will be lost. In addition, when a hoisting load or bending by a driving sheave is applied to the hoisting rope, the larger the rope diameter, the greater the force of the steel strands arranged on the outer periphery to tighten the core leash, causing sag at the contact area. Or the core rope becomes thin due to wear. In addition, the density of the core rope is made at the maximum density regardless of the diameter of the rope, but the spring constant decreases (in inverse proportion to the rope diameter) as the diameter increases, and the diameter change during loading increases, making it steel. The gap between the strands becomes small, the steel strands come into contact with each other at an early stage, and wear and disconnection are likely to occur, resulting in a short life. These have recently become a problem.
From the above, in the conventional elevator hoisting rope, the core rope with three core ropes has a limit of a rope diameter of 12 mm or less and cannot be applied at a diameter larger than this.

  The present invention has been made to solve the above-described problems, and by increasing the density of the core rope and dispersing the tightening force of the steel rope that comes into contact with the core rope during loading, The present invention provides an elevator hoisting rope having a high fatigue property and capable of stabilizing the shape over time, and a method for manufacturing the same.

  The elevator hoisting rope according to the present invention is a rope in which an elevator car on which a passenger rides is suspended at one end and a counterweight is suspended at the other end. Then, in a core rope composed of a fiber bundle in the center and a steel rope formed by twisting steel wires arranged on the outer periphery of the core rope, One core rope made by twisting fiber bundles and arranged as a core in the center of the core rope, and four core ropes arranged around the core rope and serving as the outer circumference of the core rope It is comprised from these.

  In addition, the four core ropes are arranged in a substantially square shape so as to be in contact with each other on the outer circumference of the core rope to reduce the gap between the ropes, and twist the steel wire arranged on the outer circumference of the core rope. It is uniformly compressed and shaped by the combined steel strands.

  The elevator hoisting rope manufacturing method according to the present invention includes a step of bundling fiber bundles and twisting to produce a core rope yarn and a core rope rope yarn, and a plurality of core rope yarns. A step of twisting together to produce one core rope, a step of twisting a plurality of core rope rope yarns to produce four core ropes, and arranging one core rope in the center Four core ropes are arranged on the outer circumference of the core rope, a step of manufacturing the core rope by twisting one central rope and four outer core ropes in the center, and on the outer circumference of the core rope A step of producing a hoisting rope by twisting steel strands obtained by twisting steel wires.

  According to the present invention, by increasing the density of the core rope made of fiber bundles and dispersing the tightening force of the steel rope that comes into contact with the core rope at the time of loading, the fatigue resistance is high and even over time. The shape can be stabilized, and there is an effect that a long-life elevator hoisting rope can be realized.

Embodiment 1 FIG.
FIG. 1 is a block diagram conceptually showing the overall configuration of the elevator, FIG. 2 is a block diagram conceptually showing the structure of an elevator hoisting rope, and FIG. 3 is an elevator hoisting rope according to Embodiment 1 of the present invention. FIG. 4 is a sectional view of a hoisting rope completed by twisting a steel strand around the outer circumference of the hoisting rope of the hoisting rope for an elevator according to Embodiment 1 of the present invention.

  As shown in FIG. 1, the elevator hoisting rope 1 is wound around a driving sheave 2 connected to a driving motor, and an elevator car 3 on which a passenger rides is suspended at one end of the hoisting rope 1. A counterweight 4 is suspended from the other end of the hoisting rope 1. Then, the car 3 and the counterweight 4 suspended from both ends of the hoisting rope 1 are moved up and down in the hoistway by the rotation of the driving sheave 2. Further, as shown in FIG. 2, the hoisting rope 1 for an elevator is a steel rope 12 in which a core rope 11 made of a central fiber bundle and a steel wire arranged on the outer periphery of the core rope 11 are twisted together. It consists of and.

  The structure of the core rope 11 of the elevator hoisting rope 1 according to Embodiment 1 of the present invention is formed by twisting together a number of yarns 111 bundled with natural sisal fiber or synthetic polypropylene fiber, as shown in FIG. One core rope 113 is arranged in the center, and the four core ropes 112 are arranged on the outer periphery of the core rope 113 so as to contact each other and the gap between the ropes is reduced. There is. That is, in the core rope 11 according to the present invention, a large number of yarns 111 in which natural sisal fibers and synthetic polypropylene fibers are bundled are twisted around the outer periphery of a single core rope 113 arranged at the center. It is a configuration in which four core ropes 112 are twisted together, and one core rope 113 is arranged at the center of the core rope 11, and four core ropes are arranged around the core rope 113 on the outer periphery thereof. When the wires 112 are twisted together with the eight steel strands 12 composed of the steel wires 121 by arranging the 112 in a substantially regular square so as to contact each other and reducing the gap between the strands, FIG. As shown in FIG. 4, since the four core ropes 112 are almost uniformly compressed and deformed, the overall density of the core rope 11 can be increased, and the steel cord that contacts the core ropes 112 when loaded is used. Can disperse the tightening force of the rope 12 Since, it is possible to realize the hoisting ropes 1 high fatigue resistance. In addition, since one core cord rope 113 is disposed as a core body in the center of the core rope 11, the density of the core rope 11 is substantially uniform, and the difference in density is small and the core rope 11 is extremely high in density. In addition, since the four core ropes 112 are arranged in a substantially square shape so as to contact each other on the outer periphery of the core rope 113, the gap between the ropes is reduced. Even when it is obtained, the deformation amount of the core rope 112 can be suppressed to a low level, the fibers of the core rope 11 are not cut, and the rope surface is not damaged. Thereby, stabilization of the shape of a rope and long life can be aimed at. Moreover, since the load which the steel strand 12 clamps the core rope 11 at the time of load can be disperse | distributed and it can reduce to 3/4 of the load of the conventional rope, it occurs in the contact part of the steel strand 12 and the core rope 112 Aging wear can be reduced. As a result, the shape can be stabilized over time, and a long-life hoisting rope can be realized. In addition, since there are four core rope cords 112 on the outer periphery of the core rope 11, it is suitable for a hoisting rope having a diameter of up to 16 mm.

  Next, the manufacturing method of the hoisting rope for elevators of this invention is demonstrated. First, natural sisal fiber or synthetic polypropylene fiber is bundled and twisted to produce the yarn 111 for the core rope 113 and the yarn 111 for the core rope 112. Next, one core rope 113 is manufactured by twisting a plurality of yarns 111 for core ropes 113, and four core ropes 112 are manufactured by twisting a plurality of yarns 111 for core ropes 112. . One core rope 113 is arranged in the center and four core ropes 112 are arranged on the outer periphery of the core rope 113, and one core rope 113 in the center and four core ropes on the outer periphery are arranged. The ropes 112 are twisted together to produce the core rope 11 (see FIG. 3). At this time, since the core rope 113 is arranged at the center of the core rope 11, the core rope 113 is arranged in a substantially square shape so that the four core ropes 112 are in contact with each other around the core rope 113. There are fewer gaps between them. Next, eight steel strands 12 in which steel wires 121 are twisted around the outer circumference of the core rope 11 are twisted to produce the hoisting rope 1 (see FIG. 4). At this time, the steel rope 12 is pressed to compress and shape the core rope 11 as shown in FIG. 4, but since the four core ropes 112 are arranged on the outer periphery of the core rope 113, Since the core rope 112 is compressed and deformed almost uniformly by the steel rope 12, not only can the density of the core rope 11 be increased, but also the steel rope 12 in contact with the core rope 12 when loaded Since the tightening force can be dispersed, the hoisting rope 1 having high fatigue resistance can be realized. In addition, since the single core rope 113 is disposed as the core body in the center of the core rope 11, the density of the core rope 11 is substantially uniform, and the difference in strength is small, resulting in an extremely high density core rope 11. In addition, since the four core ropes 112 are arranged in a substantially square shape so as to be in contact with each other on the outer periphery of the core rope 113, the gap between the ropes is reduced. Even when it is obtained, the deformation amount of the core rope 112 can be suppressed to a low level, the fibers of the core rope 11 are not cut, and the rope surface is not damaged. Thereby, stabilization of the shape of a rope and long life can be aimed at. Moreover, since the load which the steel strand 12 clamps the core rope 11 at the time of load can be disperse | distributed and it can reduce to 3/4 of the load of the conventional rope, it occurs in the contact part of the steel strand 12 and the core rope 112 Aging wear can be reduced.

Embodiment 2. FIG.
FIG. 5 is a sectional view showing the structure of an elevator hoist rope core rope according to Embodiment 2 of the present invention, and FIG. 6 is a view showing the structure of an elevator hoist rope core rope according to Embodiment 2 of the present invention made of steel. It is sectional drawing of the hoisting rope completed by twisting a lasso.

  The structure of the core rope 11 of the elevator hoisting rope 1 according to the second embodiment of the present invention is formed by twisting a large number of yarns 111 bundled with natural sisal fiber or synthetic polypropylene fiber, as shown in FIG. One core cord 113 is arranged in the center, and six core ropes 112 are arranged on the outer periphery of the core cord 113 so as to be in contact with each other and with a small gap between the cords. There is. That is, in the core rope 11 according to the present invention, a large number of yarns 111 in which natural sisal fibers and synthetic polypropylene fibers are bundled are twisted around the outer periphery of a single core rope 113 arranged at the center. 6 core ropes 112 are twisted together, one core rope 113 is arranged at the center of the core rope 11, and 6 core ropes around the core rope 113 around the core rope As shown in FIG. 6, the eight steel strands 12 formed of the steel wires 121 and the strands are twisted by arranging 112 in a substantially regular hexagon so as to contact each other and reducing the gap between the strands. Since the six core ropes 112 are compressed and deformed almost uniformly when deformed, the overall density of the core rope 11 can be increased, and the steel cord contacting the core ropes 112 when loaded Can disperse the tightening force of the rope 12 Since, it is possible to realize the hoisting ropes 1 high fatigue resistance. In addition, since the core rope 113 is disposed as the core body in the center of the core rope 11, the density of the core rope 11 is substantially uniform, and the density of the core rope 11 is reduced with little difference in density. In addition, since the six core ropes 112 are arranged in a regular hexagonal shape so as to contact each other on the outer periphery of the core rope 113 so as to reduce the gap between the ropes, a core rope having a density higher than that of the conventional rope is provided. Even when it is obtained, the deformation amount of the core rope 112 can be suppressed to a low level, the fibers of the core rope 11 are not cut, and the rope surface is not damaged. Thereby, stabilization of the shape of a rope and long life can be aimed at. Moreover, since the load which the steel strand 12 clamps the core rope 11 at the time of load can be disperse | distributed and it can reduce to 1/2 of the load of the conventional rope, it occurs in the contact part of the steel strand 12 and the core rope 112. Aged wear can be further reduced. As a result, the shape can be stabilized over time, and a long-life hoisting rope can be realized. In addition, since six core ropes 112 on the outer periphery of the core rope 11 are provided, it is suitable for a hoisting rope having a diameter of up to 24 mm.

  Next, a method for manufacturing the hoisting rope for an elevator according to the second embodiment will be described. First, natural sisal fiber or synthetic polypropylene fiber is bundled and twisted to produce the yarn 111 for the core rope 113 and the yarn 111 for the core rope 112. Next, one core rope 113 is manufactured by twisting a plurality of yarns 111 for core ropes 113, and six core ropes 112 are manufactured by twisting a plurality of yarns 111 for core ropes 112. . One core rope 113 is arranged in the center and six core ropes 112 are arranged on the outer periphery of the core rope 113, and the one core rope 113 in the center and the six core ropes on the outer periphery are arranged. The ropes 112 are twisted together to produce the core rope 11 (see FIG. 5). At this time, since the core rope 113 is arranged at the center of the core rope 11, the core rope 113 is arranged in a substantially hexagonal shape so that the six core ropes 112 are in contact with each other around the core rope 113. There are fewer gaps between them. Next, eight steel strands 12 in which steel wires 121 are twisted around the outer circumference of the core rope 11 are twisted to produce the hoisting rope 1 (see FIG. 6). At this time, the steel rope 12 is pressed to compress and shape the core rope 11 as shown in FIG. 6. Since the six core ropes 112 are arranged on the outer periphery of the core rope 113, Since the core rope 112 is compressed and deformed almost uniformly by the steel rope 12, not only can the density of the core rope 11 be increased, but also the steel rope 12 in contact with the core rope 12 when loaded Since the tightening force can be dispersed, the hoisting rope 1 having high fatigue resistance can be realized. In addition, since the single core rope 113 is disposed as the core body in the center of the core rope 11, the density of the core rope 11 is substantially uniform, and the difference in strength is small, resulting in an extremely high density core rope 11. In addition, since the six core ropes 112 are arranged in a substantially regular hexagon so as to contact each other on the outer periphery of the core rope 113, the gap between the ropes is reduced. Even when it is obtained, the deformation amount of the core rope 112 can be suppressed to a low level, the fibers of the core rope 11 are not cut, and the rope surface is not damaged. Thereby, stabilization of the shape of a rope and long life can be aimed at. Moreover, since the load which the steel strand 12 clamps the core rope 11 at the time of load can be disperse | distributed and it can reduce to 1/2 of the load of the conventional rope, it occurs in the contact part of the steel strand 12 and the core rope 112. Aged wear can be further reduced.

It is a block diagram which shows notionally the whole structure of an elevator. It is a block diagram which shows notionally the structure of the hoisting rope for elevators. It is sectional drawing which shows the structure of the core rope of the hoisting rope for elevators in Embodiment 1 of this invention. It is sectional drawing of the hoisting rope completed by twisting a steel rope on the outer periphery of the core rope of the hoisting rope for elevators in Embodiment 1 of this invention. It is sectional drawing which shows the structure of the core rope of the hoisting rope for elevators in Embodiment 2 of this invention. It is sectional drawing of the hoisting rope completed by twisting a steel rope on the outer periphery of the core rope of the hoisting rope for elevators in Embodiment 2 of this invention. It is sectional drawing which shows the structure of the core rope of the conventional hoisting rope for elevators. It is sectional drawing of the hoisting rope completed by twisting a steel strand on the outer periphery of the core rope of the conventional hoisting rope for elevators.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hoisting rope for elevators 2 Drive sheave 3 Elevator car 4 Balance weight 11 Core rope 111 Yarn
112 core rope
113 core rope
12 steel lasso 121 steel wire

Claims (6)

A rope that is wound around a driving sheave connected to a driving motor, an elevator car on which passengers ride on one end, and a counterweight that is suspended on the other end. In an elevator hoisting rope composed of a leash and a steel strand made by twisting steel wires arranged on the outer periphery of the core leash,
The core rope made of the fiber bundle is manufactured by twisting the fiber bundle, and is arranged on the outer periphery of the core rope with one core rope arranged at the center of the core rope. An elevator hoisting rope comprising four core ropes on the outer periphery.   The four core ropes are arranged in a substantially square shape so as to be in contact with each other on the outer periphery of the core rope, reducing the gap between the ropes, and twisting steel wires arranged on the outer periphery of the core rope. The hoisting rope for an elevator according to claim 1, wherein the hoisting rope for an elevator according to claim 1 is uniformly compressed and shaped by a steel strand. A rope that is wound around a driving sheave connected to a driving motor, an elevator car on which passengers ride on one end, and a counterweight that is suspended on the other end. In an elevator hoisting rope composed of a leash and a steel strand made by twisting steel wires arranged on the outer periphery of the core leash,
The core rope made of the fiber bundle is manufactured by twisting the fiber bundle, and is arranged on the outer periphery of the core rope with one core rope arranged at the center of the core rope. An elevator hoisting rope comprising six core ropes on the outer periphery.   The six core ropes are arranged in an approximately regular hexagon so as to be in contact with each other on the outer periphery of the core rope, reducing the gap between the ropes, and twisting steel wires arranged on the outer periphery of the core rope. The hoisting rope for an elevator according to claim 3, wherein the hoisting rope for an elevator is uniformly compressed and shaped by a steel strand. A rope that is wound around a driving sheave connected to a driving motor, an elevator car on which passengers ride on one end, and a counterweight that is suspended on the other end. In the manufacturing method of the hoisting rope for an elevator composed of a steel rope and a steel rope formed by twisting steel wires arranged on the outer periphery of the core steel,
Bundling fiber bundles and twisting to produce a core rope yarn and a core rope rope yarn;
Twisting the plurality of core rope yarns to produce one core rope;
Twisting the plurality of core rope rope yarns to produce four core rope ropes;
The one core rope is arranged in the center and the four core ropes are arranged on the outer periphery of the core rope, and the central one core rope and the four outer core ropes are twisted together. , Making the core rope,
Twisting a steel strand obtained by twisting a steel wire on the outer periphery of the core rope, and producing a hoisting rope;
A method for manufacturing an elevator hoisting rope. A rope that is wound around a driving sheave connected to a driving motor, an elevator car on which passengers ride on one end, and a counterweight that is suspended on the other end. In the manufacturing method of the hoisting rope for an elevator composed of a steel rope and a steel rope formed by twisting steel wires arranged on the outer periphery of the core steel,
Bundling fiber bundles and twisting to produce a core rope yarn and a core rope rope yarn;
Twisting the plurality of core rope yarns to produce one core rope;
Twisting the plurality of core rope rope yarns to produce six core rope ropes;
The one core rope is arranged in the center and the six core ropes are arranged on the outer periphery of the core rope, and the central one core rope and the six outer core ropes are twisted together. , Making the core rope,
Twisting a steel strand obtained by twisting a steel wire on the outer periphery of the core rope, and producing a hoisting rope;
A method for manufacturing an elevator hoisting rope.

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