JP4064668B2 - Composite wire rope - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a composite type wire rope suitable for cargo handling such as for elevators and cranes.
[0002]
[Prior art]
An elevator is a system that moves a car connected to a rope up and down using friction force between a rope and a sheave. As a main rope for lifting and driving, a conventional elevator rope generally has a fiber core at the center. 6 × S (19), 8 × S (19), 6 × W (19), 8 × W (19), 6 × Fi (25), 8 × Fi (25) diameter of about 12 mm, A wire rope having a breaking load of 64.4 kN class was used. Further, regarding the material of the wire constituting the rope, low carbon steel is used to prevent the sheave from being worn, considering that the sheave is expensive and takes a lot of time and labor to replace.
[0003]
[Problems to be solved by the invention]
However, the conventional rope for an elevator has a large sheave diameter of about 500 mm due to the large strand diameter of the rope, and the driving machinery such as a motor has been enlarged in connection with this. For this reason, it was impossible to reduce the size of the machine room installed on the rooftop, and it was inevitable that the facilities would become even larger due to the increase in the weight of the rope when the building heightened.
[0004]
In addition, conventional elevator ropes use low-carbon steel to prevent the sheave wear and intentionally suppress the hardness, which limits the improvement in the strength of the ropes. It was a problem in application.
[0005]
Also, conventional elevator ropes require oiling to generate rust and improve fatigue, resulting in a low coefficient of friction and slippage between the sheave and the rope. As a result of this slip, the rotational movement of the sheave due to the rotation of the motor is not accurately transmitted to the rope, and the rotational movement of the sheave and the vertical movement of the car are not linked to each other, making it impossible to accurately control the position of the car. Therefore, conventionally, special processing to form an undercut in the groove of the sheave has been applied, and the rope is wound by the double wrap method, which increases the equipment cost and attaches and replaces the rope. There was a problem that the work was very time-consuming.
[0006]
On the other hand, conventional ropes for cranes also have large sheave diameters and drum diameters for the same reason and cannot be increased in size, and because of metal-to-metal contact, there is much wear and the life of sheaves, drums and ropes is short. In addition, rusting is likely to occur, and oiling is required to reduce this, so there is a problem that the oil adheres to the sheaves and drums and scatters around, causing the crane body and surroundings to become dirty. It was.
[0007]
The present invention has been made in order to solve the above-mentioned problems, and the object of the present invention is to be flexible and have a thin rope diameter, yet have a high strength per unit cross-sectional area and a weight per unit length. A lightweight fiber that can achieve good frictional contact with the sheave while maintaining the required fatigue even when the sheave diameter is reduced when used as a moving cord, saving system space and reducing costs. The object is to provide a composite wire rope.
[0008]
[Means for Solving the Problems]
  In order to achieve the above object, the composite wire rope of the present invention is:Tensile strength 280kg / mm ² More thanA wire rope using high-strength steel strands, a core portion in which strands are twisted together and a polymer compound coating is applied to the outer periphery, and a plurality of twisted assemblies in which the strands are twisted and arranged on the outer periphery of the core portion At least one side layer of books;High modulus of elasticity of 20 g / d or more and high strength of 500 g / d or moreThe main body of the high-performance fiber and a coating layer provided on the outer periphery thereof, a fiber strip filled between each twisted body surrounded by a circumscribed circle of the side layer, and a height applied to the outer periphery of the side layer The basic feature is that it has an exterior coating made of molecular compounds.
  In addition to the above configuration, the present invention providesHigh modulus of elasticity of 20 g / d or more and high strength of 500 g / d or moreIt has a main body of high-performance fiber and a coating layer provided on the outer periphery thereof, and is provided with a fiber strip filled between the outer periphery of the core part and each twisted body of the side layer.
[0009]
  The present invention also providesTensile strength 280kg / mm ² More thanA wire rope using high-strength steel strands, a core portion in which strands are twisted and a polymer compound coating is applied to the outer periphery, and a twisted combination in which a plurality of strands are twisted together,High modulus of elasticity of 20 g / d or more and high strength of 500 g / d or moreIt is characterized by comprising a plurality of composite layers in which a fiber strip provided with a coating layer on the outer periphery of the main body of the high-performance fiber is alternately arranged on the periphery and the outer periphery is coated with a polymer compound.
[0010]
The wire rope of the present invention is suitable for an elevator for transmitting power (for example, a main rope for lifting and driving, a governor rope for detecting an abnormal speed, etc.) because a good friction coefficient is obtained with a sheave. Further, it is suitable not only for elevators but also as a moving line for cargo handling equipment and machines represented by cranes.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1A schematically shows a traction type elevator to which a composite wire rope according to the present invention is applied. 1 is a composite wire rope according to the present invention, and a is a car fixed to the end of the wire rope 1. , B is a counterweight fixed to the other end of the wire rope 1, c is a driving sheave for controlling the movement of the wire rope 1, d is a motor for driving the driving sheave c, and e is a guide sheave for deflecting.
[0012]
FIG. 1 (b) shows an example of a crane to which a composite wire rope according to the present invention is applied, where f is a traveling body, g is a boom, h is a hoisting drum, and i is a boom prone drum. 1 is led from a hoisting drum through a sheave j at the top of the boom, and another rope 1 of the present invention is connected from a boom prone drum i to a boom g.
[0013]
[About the first aspect] Core Schenkel + Side Schenkel
2 and 3 show an example of the first mode of the composite wire rope 1 in an enlarged manner, and FIGS. 4 to 10 show the details thereof. In this example, a structure of 7 × (7 × 19) as a whole, more specifically, a fiber strip is added, and {{(1 + 6) +12} + 6 × {(1 + 6) +12} + 6 × F] + 6 × [ {(1 + 6) +12} + 6 × {(1 + 6) +12}] + 6 × F.
The wire rope 1 has a coated core schenkel 7 as a core part, and a plurality of (six in the drawing) side schenkels 8 surrounding the coated core schenkel 7 as a side layer. A compound coating 9 is applied, and an exterior coating 10 of a polymer compound is applied to the outside including the space between the side schenkels 8, and the entire rope has a circular cross section.
[0014]
Further, a plurality of (six in this example) fibers are provided in a space surrounded by the covering schenkel 7 and the side schenkel 8, that is, in each portion corresponding to the valleys of the side schenkels 8 and 8 on the outer periphery of the covering schenkel 7. A strip (hereinafter referred to as an inner layer side fiber strip) 11 is filled.
[0015]
Further, relative to the space surrounded by the rope circumscribing circle without the side schenkel 8 and the outer sheath 10, that is, each portion corresponding to the valley of each side schenkel 8, 8, relative to the inner layer side fiber strip 11. A thick plurality (six in this example) of fiber strips (hereinafter referred to as outer layer side fiber strips) 12 are filled. Each of the inner layer side fiber body 11 and the outer layer side fiber body 12 has a main body 13 and a coating layer 14 surrounding the outer periphery thereof, and is twisted simultaneously with each Schenkel in the final step of twisting the rope.
[0016]
As shown in FIG. 3, the coated core schenkel 7 is formed by twisting a plurality of (six in the drawing) side strands 7b around a central core strand 7a. A compound coating 9 is applied.
Similarly, each side Schenkel 8 is formed by arranging and twisting a plurality of (six in the drawing) side strands 8b around the core strand 8a, and is not coated with a polymer compound.
[0017]
The structure of each part will be described in detail. The core strand 7a and the side strand 7b of the core schenkel 7 and the core strand 8a and the side strand 8b of the side schenkel 8 each have a required number, for example, 19 steel strands (hereinafter referred to as 19 steel strands in this example). It is configured by twisting together (called strands).
The wire diameter (WR) is in the range of 25 ≦ DR / WR ≦ 75 in relation to the rope diameter (DR) before the exterior coating 10 is applied. This is because when 25 <DR / WR, due to repeated bending with the sheave, the fatigue limit is reached relatively early, causing a problem in safety and shortening the life, and when DR / WR> 75, the cost is high. It is. Preferably, 33 ≦ DR / WR ≦ 75.
[0018]
The wire has a tensile strength of 280 kg / mm²It is preferable to have the above characteristics. This is to achieve a sufficient breaking load even by reducing the diameter, and the tensile strength is 280 kg / mm.²This is because it is difficult to achieve this purpose. Such a strand is generally made by drawing a carbon steel wire having a carbon content of 0.80 wt% or more. The surface of the strand has a thin corrosion-resistant coating layer such as zinc, zinc / aluminum alloy plating, or brass plating. The conditions of such strands are the same for all the strands of each aspect described below.
[0019]
As shown in FIGS. 4A and 4B, the core strand 7a of the core schenkel 7 is composed of a central core strand 700 and a large number of side strands 701 and 702 having relatively smaller diameters. Yes. In order to obtain such a configuration, the core strand 700 and the side strands 701 and 702 may be twisted together. However, it is preferably configured by two-step twisting so as not to cause rotation.
[0020]
4 (a) and 4 (b) show the manufacturing process of the core strand 7a of the core Schenkel 7, and as shown in FIG. The inner layer 70a made of 1 + n is formed by a first step in which a plurality of (6 in the drawing) side strands 701 having a small diameter are arranged and twisted at a predetermined twist pitch, and the inner layer 70a is formed as shown in FIG. The outer layer 70a ′ is formed by a second step in which a plurality of (12 in the drawing) side strands 702 are arranged on the outer periphery of the 70a and twisted at a predetermined twist pitch. In this case, the twist direction in the first step and the twist direction in the second step are the same direction (for example, the Z direction). The side strands 701 of the inner layer 70a and the side strands 702 of the outer layer 70a 'may have the same diameter.
[0021]
5 (a) and 5 (b) show a manufacturing process of each side strand 7b of the core schenkel 7, and a plurality of wires (in the drawing, 6 are relatively smaller in diameter around the core wire 703). The inner layer 70b made of 1 + n is formed by the first step of arranging the side strands 704 and twisting at a predetermined twist pitch. Side strand 7b is obtained by a second step {(1 + n) + m} in which a plurality of m (12 in the drawing) side strands 705 to be outer layers are arranged on the outer periphery of inner layer 70b and twisted at a predetermined twist pitch. It is done. In this case, the twisting directions of the first step and the second step are the same direction, but in the relationship with the core strand 7a, the opposite direction (for example, the S direction) is used. The twist pitch is the same for both the core strand 7a and the side strand 7b.
[0022]
The diameter of the core strand 703 of the side strand 7b is preferably relatively smaller than the diameter of the core strand 701 of the core strand 7a, for example, the same as the side strands 701 and 702 of the core strand 7a. The diameters of the side strands 704 and 705 of the side strand 7b are smaller than the diameters of the side strands 701 and 702 of the core strand 7a, so that the diameter d1 of the core strand 7a is appropriately larger than the diameter d2 of the side strand 7b. is doing. The “strand diameter” means a circumscribed circle of the strands of the outer layer constituting the strand.
[0023]
The reason why the diameter d1 of the core strand 7a is made larger than the diameter d2 of the side strand 7b as described above is that a gap allowing the permeation of the polymer compound is formed between the side strands 7b when the core schenkel is made. The (d1-d2) / d2 × 100 is usually about 1.4 to 6.8%.
[0024]
A plurality of (six in the drawing) side strands 7b are arranged and twisted around one core strand 7a obtained as described above. In this case, the twist pitch is generally about 6 to 9 times the finished Schenkel diameter, and the twist direction is the same as the twist direction of the core strand 7a. This is because manufacturing is easy and there is little loss of shape against process variations.
In this way, the core shunkel 7P as shown in FIG.
[0025]
In the present invention, the core Shunkel 7P is coated with a polymer compound to form a polymer compound coating 9 as shown in FIG. This polymer compound has good adhesion to steel, and preferably has wear resistance, oil resistance, water resistance, temperature characteristics, weather resistance, flexibility (stress crack resistance), Typical polymer compounds include general-purpose synthetic resins such as polyethylene, polypropylene, and fluorine resin, but engineering plastics may also be used. Alternatively, rubbers such as diene, olefin, and urethane may be used.
[0026]
The polymer compound coating 9 can be formed by any method, and the core Shunkel 7P may be continuously passed through the melt, or may be extruded around the core Shunkel 7P by an extruder. The polymer compound coating 9 has a coating thickness t so as to prevent fretting between the core sunkkel 7P and the side schenkel 8 and to ensure a sufficient space for filling the fiber strips 11 and 12. Set.
The polymer compound reaches the surface of the core strand 7a through the gap between the side strands 7b and 7b, thereby forming a film having a buffering performance. A part 90 of the polymer compound may also penetrate between the strands of the side strands 7b, or may penetrate between the strands of the core strand 7a.
[0027]
Next, the core strand 8a and the side strand 8b of the side schenkel 8 will be described. As shown in FIGS. 7A and 7B, the core strand 8a of the side schenkel 8 includes It is composed of a plurality of side strands 801 and 802 having relatively small diameters, and the strand diameter may be the same as that of the core Shunkel 7.
7 (a) and 7 (b) show the manufacturing process of the core strand 8a. Similar to the case of the core shunkel 7, a plurality of pieces having a relatively smaller diameter around a single core wire 800. The inner layer 80a made of 1 + n is formed by the first step of arranging the side strands 801 (six in the drawing) 801 and twisting at a predetermined twist pitch. As the second step, a plurality of outer layers are formed on the outer periphery of the inner layer 80a. {(1 + n) + m} is formed by arranging m (12 in the drawing) side strands 802 and twisting them at a predetermined twist pitch.
In this case, the twisting directions of the first step and the second step are the same, but the opposite direction (for example, the S direction) from the core strand 7a of the core shunkel 7 is used.
[0028]
8 (a) and 8 (b) show the manufacturing process of the side strand 8b of the side schenkel 8, and a plurality of wires (six in the drawing) having a relatively smaller diameter around one core wire 803. ) Side wires 804 are arranged and twisted at a predetermined twist pitch to form an inner layer 80b made of 1 + n, and as a second step, a plurality of m (12 in the drawing) to be outer layers on the outer periphery of the inner layer 80b. {(1 + n) + m} formed by arranging side strands 805 of the present and twisting at a predetermined twist pitch. In this case, the twisting directions of the first step and the second step are the same direction, but in the relationship with the core strand 8a, the opposite direction (for example, the Z direction) is used. The twist pitch is the same for both the core strand 8a and the side strand 8b.
[0029]
The diameter of the core strand 803 of the side strand 8b is appropriately smaller than the core strand 800 of the core strand 8a, the side strands 804 and 805 of the side strand 8b are the same, and the side strands 801 and 802 of the core strand 8a are the same. Thus, the diameter d3 of the core strand 8a is appropriately larger than the diameter d4 of the side strand 8b. Basically, the diameter relation of the strands may be the same as the core strand 7a and the side strand 7b of the core shunkel 7.
[0030]
Then, a plurality of (six in the drawing) side strands 8b are arranged around one core strand 8a and twisted together. In this case, the twist pitch is generally about 6 to 9 times the finished Schenkel diameter, and the twist direction is the same as the twist direction of the core strand 7a (for example, the S direction). This is because manufacturing is easy and there is little loss of shape against process variations.
The side shunkel 8 as shown in FIG. 9 is made by the above process. The outer diameter of the side schenkel 8 may be substantially the same as that of the core schenkel 7P, but since the polymer compound coating 9 is not provided, the outer diameter is reduced accordingly.
[0031]
Next, the inner layer side fiber strip 11 and the outer layer side fiber strip 12 will be described. The inner-layer side fiber body 11 and the outer-layer side fiber body 12 have a high elastic modulus (20 g / d or more), high strength (500 g / d or more), resistance to bending fatigue, low elongation, wear resistance, High-performance fibers having characteristics such as weather resistance and chemical resistance are preferably used. Specific examples include para-aramid fibers, ultra high molecular weight polyethylene fibers, aromatic polyester fibers, polyparaphenylene benzohistoxazole (PBO), PBZT, and PBS. Moreover, the inorganic fiber represented by carbon fiber may be sufficient.
[0032]
The inner-layer-side fiber strip 11 and the outer-layer-side fiber strip 12 are selected from those obtained by aligning yarns in parallel, those obtained by twisting or braiding a plurality of twisted strands (strands) obtained by collecting a plurality of yarns. A main body 13 is provided. The main body 13 may be a fiber, but is usually impregnated with a thermosetting resin such as a modified epoxy resin, unsaturated polyester resin, alkyd resin, or unsaturated alkyd resin as a matrix so as not to be crushed. It is composited. Furthermore, the main body 13 has a coating layer 14 on the outer periphery. The coating layer 14 is generally a film-like coating with a polymer compound, but may be a fiber coating, for example, a braided structure.
[0033]
The film-like coating preferably has wear resistance, oil resistance, water resistance, temperature characteristics, weather resistance, and flexibility (stress crack resistance), and a typical polymer compound is polyurethane. General-purpose synthetic resins such as polyethylene, polypropylene, and fluorine resin can be used, but engineering plastics may also be used. Alternatively, rubbers such as diene, olefin, and urethane may be used.
The polymer compound coating may be formed by any method, and the polymer compound may be continuously passed through the melt, or may be extruded by an extruder around the melt.
[0034]
FIGS. 10A to 10H show an example of the inner layer side fiber body 11 and the outer layer side fiber body 12, and FIG. 10A shows a case in which a coating layer 14 is provided on a main body 13 in which yarns are aligned in parallel. Yes. In (b), a coating layer 14 is provided on the outer periphery of a main body 13 in which three strands are beaten. In (c), seven strands are twisted in the form of 1 + 6, and a coating 14 is provided on the outer periphery of the main body 13. In (d), a strand is braided into 1 × 8 to form a main body 13 and a coating 14 is provided on the outer periphery. In (e), a coating 14 is provided on the outer periphery of a main body 13 in which strands are braided into 2 × 4. (F) is also provided with a coating 14 on the outer periphery of the main body 13 braided 2 × 6. In (g), a twisted structure such as (b) or (c) is used as a core, a braided body is provided around this, and a coating 14 is provided on the outer periphery. (H) has a braided body as a core, a braided body is provided around the core, and a coating 14 is provided on the outer periphery. In addition, in each aspect mentioned later, the structure of a "fiber strip" points out what was mentioned above.
[0035]
The elements obtained as described above are combined, and a rope is twisted using a tubular twisting machine. That is, the inner layer side fiber strips 11 are arranged at equal intervals around the coated core schenkel 7, the respective side sunkels 8 are arranged in the respective arrangement gaps of the inner layer side fiber strips 11, and the outer diameter side of each side sunkel 8 The outer layer-side fiber strips 12 are arranged between the valleys of each of these, and in this state, they are twisted to form the rope of the present invention.
The final twisting pitch is appropriately selected according to the twisting structure and the wire diameter, but is usually about 6 to 9 times the finished rope diameter, and the twisting direction is made to coincide with the twisting direction of the coated core Schenkel 7. . For example, in this example, the Z direction is used. In this way, the raw rope is completed.
[0036]
The raw rope is finally covered entirely with the polymer compound to form the outer covering 10. This exterior coating 10 is intended to adjust the coefficient of friction with the sheave, avoid metal contact between the strand and the sheave, reduce the fretting between the side strands of the side schunkel 8 and between the strands. The compound preferably has good wear resistance and weather resistance, has a suitable elasticity, has a relatively high coefficient of friction, and does not hydrolyze. Examples thereof include synthetic resins such as polyurethane-based and ether-based polyurethane elastomers, and rubber.
[0037]
The polymer compound 100 fills the gap between the outer-layer side fiber body 12 and the side schenkel 8 and fixes the arrangement of the outer-layer side fiber body 12 and the side schenkel 8. Further, the layer 101 having a predetermined thickness T is formed from the outer diameter (circumscribed circle) of the side schenkel. If the thickness T of the outer covering 10 is too thin, the durability is poor and the wear life is also reduced. If the thickness is too thick, not only the flexibility of the rope is impaired, but also the rope diameter is increased and the strength efficiency is lowered. Therefore, it is usually preferably 0.3 to 1.0 mm. The method of forming the outer covering 10 is arbitrary, for example, using an extruder.
Preferably, a part of the polymer compound 100 is further bonded to the polymer compound coating 13 of the inner layer side fiber strip 11 and the surface of the coated core Shunkel 7. This can be realized by adopting a method of covering the rope while injecting a polymer compound at the same time when the rope is finally twisted.
[0038]
In production, the side schenkel 8, the inner layer side fiber body 11, and the outer layer side fiber body 12 are passed between about three rolls arranged in a staggered manner in the process of twisting the raw rope, and the spiral mold is formed. And after passing the voice, it is done by passing the leveling roll. The molding rate may be about 0.60 to 0.90, more preferably 0.65 to 0.85. Here, the shaping rate refers to the ratio of the height of the schenkel when the schenkel is taken out from the rope diameter. By this step, it is possible to prevent the rope from rotating and to prevent looseness and to adjust the gaps between the side shenzels to be uniform and optimal.
[0039]
[About the second aspect] Core Schenkel + Side Strand
FIG. 11 to FIG. 14 show an example of the composite rope 1 of the second embodiment, and a coated core schenkel 7 is used as a core part. As a side layer surrounding this, a side strand 8 ′ is used instead of the side schenkel. It is characterized by being used.
FIG. 17 shows a structure of (7 × 7) + 8 × (3 + 9 + 15) as a whole, and more specifically, {(1 + 6) + 6 × (1 + 6) + 8 × F} + 8 × {(3 + 9 + 15) in consideration of the fiber strip F It consists of a strand type rope with a structural formula of + 8 × F}.
[0040]
More specifically, it has a coated core schenkel 7 provided with a central polymer compound coating 9 and a plurality of (eight in the drawing) side strands 8 ′ arranged so as to surround the coated core schenkel 7. The outer coating 10 made of a polymer compound is applied to the outside including the space, and the cross section is circular.
[0041]
Also in this embodiment, a plurality of pieces (in this example, in the space surrounded by the covering core schenkel 7 and the side strand 8 ′, that is, in each portion corresponding to the valleys of the side strands 8 ′ and 8 ′ on the outer periphery of the covering core schenkel 7) 8) inner layer side fiber strips 11 are filled.
In addition, a plurality (8 in this example) are provided in the space surrounded by the rope circumscribing circle without the side strand 8 ′ and the outer covering 10, that is, in each portion corresponding to the valleys of the side strands 8 ′ and 8 ′. The outer layer side fiber strips 12 are filled. The inner layer side fiber strips 11 and the outer layer side fiber strips 12 are twisted simultaneously with the respective schenkels in the final twisting step. The inner layer side fiber strip 11 and the outer layer side fiber strip 12 each have a coating layer 14 on the outer periphery.
[0042]
As shown in FIG. 12, the coated core schenkel 7 is formed by twisting a plurality of (six in the drawing) side strands 7b around a central core strand 7a. A compound coating 9 is applied.
Each side strand 8 'is a multi-layer, that is, a core (first layer) 8c in this example, a second layer 8d configured by arranging and twisting a plurality of strands around the core 8c, Each of the side strands 8 'is not individually coated with the polymer compound. The third layer 8e includes a plurality of strands arranged around the second layer 8d and twisted.
[0043]
The structure of each part will be described in detail in consideration of the manufacturing process. The core strand 7a and the side strand 7b of the core schenkel 7 are each formed by twisting together a required number, for example, seven steel strands in this example. Further, a plurality of each of the layers 8c, 8d, and 8e of the side strand 8 'are configured by twisting three, nine, and fifteen steel strands in this example in three steps.
The diameter (WR) and tensile strength of the steel strands in the core schenkel 7 and the side strand 8 'are the same as in the first embodiment.
[0044]
As shown in FIG. 12A, the core strand 7a of the core schenkel 7 has a central core wire 700 and a plurality of (six in the drawing) side strands 700 ′ having the same or relatively small diameter. It is composed of Similarly, as shown in FIG. 12B, the side strand 7b of the core schenkel 7 is composed of a central core strand 701 and a plurality of side strands 701 ′ having the same or relatively small diameter. Yes. Such a configuration can be obtained by twisting the central core wires 700 and 701 and the side strands 700 'and 701' together.
The twist direction of the core strand 7a and the twist direction of the side strand 7b are the same direction, for example, the S direction.
[0045]
The diameter of the core strand 701 of the side strand 7b is preferably relatively smaller than the diameter of the core strand 700 of the core strand 7a, so that the diameter d1 of the core strand 7a is smaller than the diameter d2 of the side strand 7b. Make it moderately large. The reason is the same as described in the first aspect.
[0046]
A plurality of (six in the drawing) side strands 7b are arranged and twisted around one core strand 7a obtained as described above. The twist pitch in this case is generally about 6 to 9 times the finished Schenkel diameter, and the twist direction is a direction different from the twist direction of the core strand 7a and the side strand 7b, that is, the Z direction in this example. This is because manufacturing is easy and there is little loss of shape against process variations.
As a result, the core Shunkel 7P as shown in FIG. In the figure, only one side strand is shown as a strand, and the other is omitted. Then, the core Shunkel 7P is coated with the polymer compound 9 to form the coated core Schenkel 7 as shown in FIG. The polymer compound is the same as that described in the first embodiment, and the coating formation method is also the same.
[0047]
Next, the side strand 8 'will be described. Basically, the structure is not limited as long as it has a multilayer structure, and the manufacturing method is not limited. FIGS. 14A, 14B, and 14C illustrate one manufacturing process of the side strand 8 '. The core portion (first layer) 8c of the side strand 8 'is composed of a plurality of strands 800 (three in the drawing) having the same diameter, and the strand diameter is, for example, the core strand 7a of the core shunkel 7 It is equal to or moderately smaller than the strand of wire and is reasonably larger than the strand of the side strand 7b. As a first step, first, as shown in FIG. 14A, such a plurality of strands 800 are twisted together at a predetermined twist pitch.
[0048]
Next, as shown in FIG. 14 (b), as the second step, a plurality of (nine in the drawing) sides of the core portion (first layer) 8c having the same or moderately thin diameter as the core portion strand are provided. An element wire 801 is disposed and twisted at a predetermined twist pitch to form the second layer 8d. Next, as a third step, the required number (15 in the drawing) of wires 802 equal to or reasonably thin as the wires of the second layer are arranged on the outer periphery of the twisted body composed of the first layer + the second layer. Then, twisting is performed at a predetermined twist pitch, thereby obtaining a side strand 8 ′ shown in FIG. 14 (c). In this case, the twist direction in the first step and the twist direction in the second step are the same (for example, the Z direction), but the twist direction in the third step is the opposite direction (for example, the S direction).
[0049]
The outer diameter D2 of the side strand 8 'is smaller than the outer diameter D1 of the coated core schenkel 2, and preferably smaller than the outer diameter of the core schenkel 7'. Thereby, a polymer compound for the exterior covering layer 10 described later can be infiltrated between the side strands 8 ′ and 8 ′.
[0050]
Since the inner layer side fiber strip 11 and the outer layer side fiber strip 12 are the same as those in the first aspect including the material and the forming method of the coating layer 14, the description thereof is incorporated. The thickness of the outer layer side fiber body 12 is made thicker than that of the inner layer side fiber body 11, and is selected according to the size of the space.
[0051]
Finally, inner layer side fiber strips 11 are arranged at equal intervals around the coated core schenkel 7, and a plurality of side strands 8 ′ (shown) are arranged so that these inner layer side fiber strips 11 are located in the valleys. 8), and the outer-layer side fiber strips 12 are arranged between the valleys of the respective side strands 8 'and twisted at a predetermined pitch with a tubular type twisted wire machine or the like.
The final twisting pitch is appropriately selected according to the twisting structure and the wire diameter, but is usually about 6 to 9 times the finished rope diameter, and the twisting direction is made to coincide with the twisting direction of the core Schenkel 7. For example, in this example, the Z direction is used. In this way, the raw rope is completed. The raw rope is finally covered entirely with the polymer compound to form the outer covering 10. The material of the exterior covering 10 is the same as that in the first aspect. The outer diameter, the coating thickness, and the coating formation method of the exterior coating 10 are the same as in the first embodiment.
[0052]
[About the third embodiment] Core strand + side strand
FIG. 15 shows a third aspect of the present invention.
This third aspect is characterized in that the whole uses a strand configuration, that is, a side strand 8 ′ as a side layer and a core strand 7 ′ instead of the core Schenkel 7 as a core portion. 7 × (3 + 9 + 15) as a structure, specifically, (3 + 9 + 15) + 6 × (3 + 9 + 15) It consists of a strand type rope with a structural formula.
[0053]
The rope 1 has a coated core strand 7 ′ coated with a polymer compound and a plurality of (six in the drawing) side strands 8 ′ arranged so as to surround the side strand 8 ′. The outer coating 10 made of a polymer compound is applied to the outer side including the space, and the cross section is circular.
[0054]
In this embodiment as well, the coating layer 14 is formed in the space surrounded by the covering core strand 7 'and the side strand 8', that is, in each portion corresponding to the valleys of the side strands 8 'and 8 on the outer periphery of the covering core strand 7'. A plurality (six in this example) of inner layer side fiber strips 11 having the following are filled.
In addition, a plurality of coating layers 14 are applied to respective portions corresponding to the valleys of the side strands 8 ′ and 8 ′ surrounded by the rope circumscribed circle without the side strand 8 ′ and the outer sheath 10. The outer layer side fiber strips 12 (6 in this example) are filled. The inner layer-side fiber strips 11 and the outer layer-side fiber strips 12 are twisted simultaneously with the respective schenkels in the final twisting step.
[0055]
The core strand 7 'and the side strand 8' basically have any structure as long as it has a multi-layer structure, and any manufacturing method may be used. For example, the side strand in the second mode shown in FIG. The same as for the strand and the manufacturing process.
That is, the core portions (first layers) 7c and 8c of the core strand 7 'and the side strand 8' are, as the first step, first, as shown in FIG. 14 (a), a plurality of strands 800 are arranged at a predetermined twist pitch. Twist together.
[0056]
Next, as a second step, a plurality of (9 in the drawing) side strands 801 are arranged around the core portions (first layers) 7c and 8c, and twisted at a predetermined twisting pitch, as shown in FIG. The second layers 7d and 8d are formed as shown in FIG. Next, as a third step, a required number (15 in the drawing) of the wires 802 are arranged on the outer periphery of the twisted body composed of the first layer + the second layer, and twisted at a predetermined twist pitch to form the third layer 7e. , 8e, thereby obtaining the core strand 7 'and the side strand 8'.
In both the core strand 7 'and the side strand 8', the twisting direction in the first step and the twisting direction in the second step are the same, but the twisting direction in the third step is opposite. However, the twist direction of the core strand 7 'and the side strand 8' is opposite. For example, if the core strand 7 'is S-S-Z, the side strand 8' is Z-Z-S.
[0057]
The outer diameter of the side strand 8 'is smaller than the outer diameter D1 of the coated core strand 7' so that the polymer compound for the outer covering 10 can be infiltrated. The side strand may be equal to the outer diameter of the core strand, but may be small.
[0058]
Finally, the inner layer side fiber strips 11 are arranged at equal intervals around the coated core strand 7 ′ coated with the polymer compound, and the side strands 8 ′ are positioned so that these inner layer side fiber strips 11 are located in the valleys. Are arranged, and the outer-layer-side fiber strips 12 are arranged between the valleys of the respective side strands 8 ′, and twisted at a predetermined pitch by a tubular type twisted wire machine or the like.
The final twist pitch is appropriately selected according to the twisted structure and the wire diameter, but is usually about 6 to 9 times the finished rope diameter, and the twisting direction is matched with the twisting direction of the core strand 7 '. Do. For example, in this example, the Z direction is used. In this way, the raw rope is completed.
The raw rope is finally covered entirely with the polymer compound to form the outer covering 10. The exterior covering 10 is the same as that in the first aspect.
[0059]
[Fourth embodiment] Core strand + strand layer + fiber composite layer
FIGS. 16-23 has shown the 4th aspect of the composite rope of this invention.
This 4th aspect made the type which twisted the strand (or Schenkel) as a twisted body in a layered form, and arranged the strands and the fiber strip 15 by turns on the circumference, and constituted the composite layer It is characterized by.
FIG. 17 shows the rope of the present invention of (1 × 37) + 26 + 32 + 40 + 46 + (4 × 24) + (4 × 30) + (4 × 38) as an example, and more specifically, {(1 + 6 + 12 + 18) + 26 + 32 + 40 + 46} + 24 × ( 1 × 4, F) + 30 × (1 × 4, F) + 38 × (1 × 4, F) structure, fiber strip F is taken into account, {(1 + 6 + 12 + 18) + 26 + 32 + 40 + 46} + {12 × (1 × 4) + 12 × F} + {15 × (1 × 4) + 15 × F} + {19 × (1 × 4) + 19 × F}.
[0060]
The wire rope 1 has a circular cross section as a whole, and is provided in a layered manner on the outer periphery of the coated core strand 20 as a core, at least one strand layer 30A, 30B, and the outermost strand layer 30B. It has one or more fiber composite twisted layers (3 layers in the drawing) 30C, 30D, and 30E.
[0061]
The coated core strand 20 has a polymer compound coating 4 on the outer periphery, the strand layers 30A and 30B are each coated with the polymer compound coating 6, and the strand layers 30C and 30D are coated with the polymer compound coating 6, respectively. The outermost layer (strand layer) 30E is provided with an exterior coating 6 'made of a polymer compound.
[0062]
The structure of each part will be described in detail in consideration of the manufacturing process. As shown in FIG. 18 (d), the coated core strand 20 is twisted around a core part 20a obtained by twisting a plurality of strands. The first side layer 20b and the second side layer 20c twisted around the first side layer 20b. Since the steel strand used for manufacture of the core strand 20 is the same as that of the 1st aspect mentioned above, description is used.
[0063]
The core portion 20a of the coated core strand 20 is formed by arranging and twisting a plurality of (six in the drawing) strands 200 'around one strand 200 as shown in FIG. Each strand 200, 200 ′ may have the same diameter.
As shown in FIG. 18 (b), the first side layer 20b has a plurality of strands 201 (12 in the drawing) that are equal to or preferably moderately thin with the strands 200, 200 ′. It is arranged around and twisted in the same twisting direction (for example, S direction) as the core part 20a.
[0064]
As shown in FIG. 18C, the second side layer 20c has a plurality of wires (18 in the drawing) 202 having the same wire diameter as the first side layer 20b arranged around the first side layer 20b. And it is twisted in the same twist direction (for example, S direction) as the 1st side layer 20b, and, thereby, core strand 20 'of a tight twist structure is obtained. In this embodiment, the core portion 20a, the first side layer 20b, and the second side layer 20c are twisted in three steps at the same twist pitch. However, since the twist directions are the same, in some cases, the core portion 20a can be obtained by collective twisting. Also good.
[0065]
Next, the core strand 20 ′ is coated with a polymer compound 4 to obtain a coated core strand 20. Since the polymer compound used and the coating method are the same as in the first embodiment, the description is incorporated.
The coating layer 4 of the polymer compound has a coating thickness t so that a sufficient space can be secured to prevent fretting between the strand 20 'and the first strand layer 30A described later on the outer periphery thereof. Set.
The polymer compound covers the surface of the second side layer 20c and fills the valleys of the strands 202 of the second side layer 20c to form a circular film having a buffering performance as a whole.
[0066]
Next, the first strand layer 30A has a two-layer structure in this example.
FIGS. 19A and 19B show a process of obtaining the first strand layer 30A. First, a required number (26 in the drawing) of strands 300 are arranged around the coated core strand 20, The first layer 30a is obtained by twisting the coated core strand 20 in the direction opposite to the twist direction (for example, the Z direction). FIG. 19A shows this stage.
[0067]
Next, the required number (32 in the drawing) of strands 301 is arranged around the first layer 30a, and the same twisting direction as that of the first layer 30a. Therefore, the direction opposite to the twisting direction of the coated core strand 20 (for example, the Z direction) ) To form a second layer 30a ′. Thus, the bare first strand layer 30A 'is obtained.
The diameters of the strands 300 and 301 are the same, for example, the strand diameters of the first side layer 20b and the second side layer 20c of the strand 20 '. The twist pitch of the first layer 30a and the second layer 30a 'is the same, and is larger than the twist pitch of the core strand 20'.
[0068]
Finally, the coating layer 6 for preventing fretting is formed on the first first strand layer 30A 'with a polymer compound, thereby completing the first strand layer 30A shown in FIG. The polymer compound is preferably the same as that used for the coated core strand 20, and the polymer compound covers the outer periphery of the second layer 30 a ′ and fills the valleys of the individual wires 301 of the second layer 30 a ′. Depending on the wire diameter and the number, the first layer 30a or even the coated core strand 20 is reached and joined to the coating 4.
[0069]
Next, the second strand layer 30B is applied. The second strand layer 30B also has a two-layer structure having a first layer 30b, a second layer 30b ', and a polymer compound coating 6.
FIG. 20 shows a state in which the second strand layer 30B is obtained, and the basic process is the same as that of the first strand layer 30A. First, a required number (40 in the drawing) of strands 300 are arranged around the first strand layer 30A, and twisted in a direction opposite to the twist direction (for example, S direction) of the first strand layer 30A. One layer 30b is obtained.
[0070]
Next, a required number (46 in the drawing) of strands 301 are arranged around the first layer 30b and twisted in the same twisting direction as the first layer 30b to form a second layer 30b ′. Get a layer.
The diameters of the strands 300 and 301 may be the same, and the twist pitch of the first layer 30b and the second layer 30b 'is the same and larger than the twist pitch of the first strand layer 30A.
[0071]
Then, the bare second strand layer is covered with a polymer compound to form a coating layer 6 for preventing fretting, thereby completing the second strand layer 30B. The polymer compound is preferably the same as that used for the first strand layer 30A. The polymer compound covers the outer periphery of the second layer 30b ′ and fills the valleys of the strands 301 of the second layer 30b ′. Depending on the wire diameter and the number of the strands, the first strand layer 30A is reached and joined to the coating.
[0072]
Next, a first fiber composite twisted layer 30C, a second fiber composite twisted layer 30D, and a third fiber composite twisted layer 30E are formed in this example on the outer periphery of the second strand layer 30B. The first fiber composite twisted layer 30C and the second fiber composite twisted layer 30D each have a coating layer 6 of a polymer compound. The twisted body may be a strand or a schenkel, but in this example, a strand is used.
[0073]
The first fiber composite twisted layer 30C has the same number of strands 30c as the required number (12 in the drawing) of strands 30c obtained by twisting two or more relatively small numbers (for example, n ≦ 7) of strands 302, and each strand 30c. The strand 30c is made up of a required number (12 in the drawing) of the first fiber strips 15 alternately arranged on the circumference, and the strand 30c is composed of four strands 302 in this example. It is made by twisting together at the same pitch as the above.
The 1st fiber strip 15 provides the coating layer 14 in the composite fiber main body 13 demonstrated to the 1st aspect. For details, the description of the first aspect is used. The first fiber strip 15 is configured so that the entire diameter including the coating layer 14 is equivalent to that of each of the twisted bodies 30c, 30d, and 30e.
[0074]
The strand diameter of each strand 30c is the same as that of the strands in the first and second strand layers 30A and 30B, or is moderately thin, and the first layer 30b and the second layer of the second strand layer 30B are used. They are twisted in the same twisting direction as 30b ′ (for example, the S direction).
The strand 30c and the first fiber strip 15 are arranged on the outer periphery of the second strand layer 30B, and are twisted together with the twisting direction opposite to the twisting direction of the second strand layer 30B (for example, the Z direction). An elementary first strand layer is formed.
[0075]
In this state, the coating layer 6 for preventing fretting is formed by coating with a polymer compound. The polymer compound is preferably the same as that used for the second strand layer 30B. The polymer compound covers the outer periphery of the first strand layer, fills the valleys between the strands 30c and the fiber strips 15, and further removes the strands. The second strand layer 30 </ b> B is reached through the gap between 30 c and the fiber strip 15, and is joined to the coating. FIG. 21 shows this state.
[0076]
FIG. 22 shows the second fiber composite twisted layer 30D. The second fiber composite twisted layer 30D has a required number (15 in the drawing) of twisted strands (strands) 30d obtained by twisting strands 303 having the same diameter as the strands 302 of the first fiber composite twisted layer 30C. Each strand 30d and the required number (15 in the drawing) of the second fiber strips 15 alternately arranged on the same circumference. In this example, the strand 30d includes four strands 303 as the first strands 303d. The strands 30c of the one-strand layer 30C have the same pitch and are twisted in the opposite direction (for example, the Z direction).
[0077]
The strand 30d and the second fiber strip 15 are arranged on the outer periphery of the first fiber composite strand layer 30C, and twisted with the twisting direction opposite to that of the first layer 30C (for example, the S direction). A strand layer is created. In this state, the coating layer 6 for preventing fretting is formed by coating with a polymer compound.
[0078]
FIG. 23 shows a third fiber composite twisted layer (final layer) 30E. The third fiber composite twisted layer 30E has a required number (19 in the drawing) of twisted strands 30e obtained by twisting the strands 304 and the required number of strands 30e alternately arranged on the same circumference. It consists of 19 third fiber strips 15 (in the drawing). In this example, the strands 30e are formed by twisting four strands 304 at the same pitch as the strands 30d of the second fiber composite twisted layer 30D and twisting directions in opposite directions (for example, S direction).
[0079]
Each strand 30e and the third fiber strip 15 are arranged on the outer periphery of the second fiber composite twisted layer 30D, and twisted with the twist direction opposite to that of the first fiber composite twisted layer 30D (for example, the Z direction), Thus, the elementary third fiber composite twisted layer 3E is made, and at the same time, the elementary rope 1P is completed.
The raw rope 1P is entirely covered with a polymer compound to form an outer covering layer 6 '. The exterior coating layer 6 'is for adjusting the friction coefficient with the sheave or drum, and suitable polymer compounds are as described in the first embodiment.
[0080]
The polymer compound covers the third layer 30E to form the outer layer coating layer 6 'having a thickness T, and at the same time, fills the valleys of the strands 30e, but a part of the second layer 30D passes through the gaps between the strands 30e. And may be joined with the coating 6. The material, outer diameter, coating thickness, and coating formation method of the exterior coating 6 ′ are the same as those in the first embodiment.
[0081]
In addition, what is necessary is just to perform the twisting process of each layer of the said 1st fiber composite twisted-bonded layer 30C-the 3rd fiber composite twisted-bonded layer 30E using a Charbler twister, and the details are as having demonstrated in the 1st aspect. It is.
[0082]
Note that the above is only an example, and the present invention is not limited to this. That is, the configuration of the coated core strand 20 is arbitrary. Furthermore, although the strand layers 30A and 30B are two layers, one layer may be sufficient and three or more layers may be sufficient. Furthermore, although it is set as 3 layers of 30 C of 1st fiber composite twisted body layers-30E of 3rd fiber composite twisted body layers, it is good also as 1st and 2nd 2 layers, and good also as 4 layers or more.
In this example, the final fiber composite twisted layer 30E is not coated with an individual polymer compound, but is entirely coated. However, as with the second layer 30D, the individual polymer compound coating is applied, An exterior coating may be applied on top.
[0083]
[Other aspects]
The above are only some examples of the present invention, and various other configurations can be adopted.
In the first to third embodiments, the inner layer side fiber strip 11 may be omitted.
In the first aspect, the second aspect, or the like, a part of the core strand or the side strand of the core schenkel may be changed from a steel strand to a fiber strip. Further, half (alternate) of the core schenkel or the side schenkel may be replaced with a fiber schenkel obtained by twisting a large number of fiber strips.
[0084]
In the first aspect, for example, as shown in FIG. 24, the rope structure may be 7 × (7 × 12). Specifically, the rope structure is composed of {(1 × 12) + 6 × (1 × 12)} + 6 × {(1 × 12) + 6 × (1 × 12)}.
Moreover, it is good also as 7x (7x7) like FIG. The structural formula is {(1 + 6) + 6 × (1 + 6)} + 6 × {(1 + 6) + 6 × (1 + 6)}.
[0085]
Furthermore, the thing of various structures other than that is included. Examples are as follows.
(1) (7 × 12) + 13 × 12 + 20 × 12 + 27 × 12
(2) {7 × (3 + 9)} + 13 × (3 + 9) + 20 × (3 + 9) + 27 × (3 + 9)
(3) (7 × 19) + 13 × 19 + 20 × 19 + 27 × 19
(4) (7 × 27) + 13 × 27
(5) {7 × (3 + 9 + 15)} + 13 × (3 + 9 + 15)
(6) (7 × 27) + 13 × 27 + 20 × 27
(7) {7 × (3 + 9 + 15)} + 13 × (3 + 9 + 15) + 20 × (3 + 9 + 15)
[0086]
In the second embodiment, the rope structure is (7 × 19) + 10 × (1 + 6 + 12 + 18) as shown in FIG. 26, more specifically, {(1 + 6 + 12) + 6 × ( 1 + 6 + 12) + 10 × F} + 10 × (1 + 6 + 12 + 18) + 10 × F.
Further, the configuration of the core Schenkel and the configuration of the side strands include (1 + 6) + 6 × (1 + 6) + 8 × (1 + 6 + 12) and the like in addition to those of the embodiment.
[0087]
Furthermore, the core schenkel and the side strand twist types include both multi-layer twists and parallel twists (each layer has the same twist pitch).
An example of multilayer twisting is as follows.
(1) {(1 + 6) + 6 × (1 + 6)} + 8 × (3 + 9 + 15)
(2) (1 + 6 + 12) + 6 × {(1 + 6 + 12)} + 10 × {(1 + 6 + 12 + 18)
(3) {(1 + 6) + 6 × (1 + 6)} + 8 × (1 + 6 + 12)
(4) (1 + 6 + 12) + 6 × (1 + 6 + 12)
(5) (1 + 6 + 12 + 18) + 6 × (1 + 6 + 12 + 18)
[0088]
An example of parallel twist is as follows.
(1) {(1 + 6) + 6 × (1 + 6)} + 8 × (27)
(2) {(1 + 6 + 12) + 6 × {(1 + 6 + 12)} + 10 × (37)
(3) {(1 × 19) + 6 × (19)} + 10 × (37)
(4) {(1 + 6) + 6 × (1 + 6)} + 8 × (19)
▲ 5 ▼ (1 × 19) + 6 × (19)
▲ 6 ▼ (1 × 37) + 6 × (37)
(7) {(1 + 6) + 6 × (1 + 6)} × 6or8 {S (19), W (19), Fi (25)}
In the case of such a parallel twist type, the strands of the inner and outer layers are in contact with each other and are in line contact with each other, and the strands are tightly tightened so that they are not easily deformed. Since the gap between the lines is small and the effective sectional area is large, there is an advantage that the cutting load becomes large.
[0089]
In the multilayer strand type of the fourth aspect, the usage form of the multilayer structure and the fiber strip is not necessarily limited to the example shown in FIG.
That is, as shown in FIGS. 27 to 33, the core schenkel and the multilayer strand may be configured, and the fiber body 15 may be arranged and twisted between the valleys of the strands forming the core schenkel and the multilayer strand.
[0090]
FIG. 28 shows another example of the multilayer strand type rope 1 of the fourth aspect, and the overall structure is (7 × 7) + 12 × 7 + 19 × 7 + 26 × 7, specifically {(1 + 6) + 6 × (1 + 6) } + 12 × (1 + 6) + 19 × (1 + 6) 26 × (1 + 6) layered fiber composite rope.
The rope 1 has a covered core schenkel 2 as a core part and a plurality of twisted layers (three layers in the drawing) 3A, 3B, 3C as side layers.
In addition, a plurality of fiber strips 15 are arranged on the coated core schenkel 2 and each twisted layer 3A, 3B, 3C, and the fiber strips 15 are included in each twisted layer 3A, 3B, 3C. Coatings 6, 6 and 6 made of a polymer compound are applied. An outer coating 6 'made of a polymer compound is applied to the outermost layer.
[0091]
As shown in FIG. 30 (b), the coated core schenkel 2 includes a plurality of (six in the drawing) side strands 2b around a central core strand 2a, and inside the circumscribed circle of the side strand 2b. A fiber strip 15 is arranged between the side strands 2b, 2b and twisted, and in this state, the polymer compound coating 4 is applied to the whole.
Each of the strand layers 3A, 3B, 3C on the side has a plurality of strands 3a, 3b, 3c obtained by twisting two or more steel strands (in this example, 12, 19, and 26) Are arranged, and the fiber strips 15 are arranged and twisted between the twisted bodies 3a, 3b, 3c in the circumscribed circles, respectively, and in this state, the polymer compound coatings 6, 6, 6 are applied, respectively. The twisted body may be a strand or a schenkel. In this example, since strands are used, they are hereinafter referred to as strands.
[0092]
The structure of each part will be described in detail. The core strand 2a of the coated core schenkel 2 is composed of a central core strand 200 and a large number of side strands having the same or relatively small diameter as shown in FIG. 200 '. Similarly, the side strand 2b of the core schenkel 2 is composed of a central core strand 201 and a large number of side strands 201 ′ having the same or relatively small diameter as shown in FIG. 29 (b). . Such a configuration can be obtained by twisting the core core wires 200 and 201 and the side strands 200 'and 201' together.
The twist direction of the core strand 2a and the twist direction of the side strand 2b are opposite directions, for example, if the core strand 2a is in the Z direction, the side strand 2b is in the S direction.
[0093]
Around one core strand 2a obtained as described above, as shown in FIG. 30A, a plurality of (6 in the drawing) side strands 2b and a plurality of fiber strips 15 (6 in the drawing). ) To twist. In this case, the twist pitch is generally about 6 to 9 times the finished Schenkel diameter, and the twist direction is the same as the twist direction of the core strand 2a, that is, the Z direction in this example. This is because manufacturing is easy and there is little loss of shape against process variations.
As described above, the core shunkel 2 'as shown in FIG. Then, the core Shunkel 2 'is coated with the polymer compound 4 to form a coated core Schenkel 2 coated with the polymer compound as shown in FIG. 30 (b).
[0094]
Next, side twisted layers (in this example, strand layers) 3A, 3B, 3C exemplify the manufacturing process in FIGS. 31 to 33, and each strand 3a of the first strand layer 3A has the same diameter. It is composed of a plurality of wires (7 in the drawing) 301 and 301 ', and the wire diameter is equal to or moderately small as the wire of the side strand 2b of the core schunkel 2.
As the first step, as in FIG. 29 (b), one strand 301 is arranged on the core, and a plurality of (six in the drawing) strands 301 ′ are arranged around it, and a predetermined twist Twist at the pitch. The twisting direction is opposite to the side strand 2b of the core schenkel 2 (for example, the Z direction).
[0095]
Next, as a second step, the strands 3a are arranged around the coated core schenkel 2, and the fiber strips 15 are arranged in the valleys of the individual strands 3a, which are opposite to the twist direction of the core schenkel 2 '. Twist in the direction (for example, S direction). This state is shown in FIG. Thus, the elementary first strand layer 3A 'is obtained. Next, the first strand layer 3A is obtained by coating the elementary first strand layer 3A 'with a polymer compound. This is the state of FIG.
In addition to covering the outer periphery of the first strand layer 3A ′, the polymer compound 6 fills the gaps between the strands 3a, 3a and the fiber body 15, and preferably penetrates into the inside from the gaps between the strands 3a, 3a, and the core Bonded with the two coatings and integrated.
[0096]
Next, the second strand layer 3B is formed. In this step, as in the case of the first strand layer 3A, the required number (19 in this example) of the strands 3b is made as the first step.
The strand 3b is composed of a plurality of strands 301 and 301 'having the same diameter (seven in the drawing), and the strand diameter is equal to or moderately equal to the strand of the side strand 2b of the core schunkel 2. small. The twist direction is opposite to the strand 3a of the strand layer 3A, and therefore, the same direction (S direction) as the side strand 2b of the first core schenkel 2.
[0097]
Next, the required number of strands 3b obtained are arranged on the outer periphery of the first strand layer 3A, and the fiber bodies 15 are arranged in the valleys between the strands 3b and twisted. The twisting direction at this time is the direction opposite to the twisting direction of the first strand layer 3A (Z direction). Since the elemental second strand layer is obtained in this way, the elemental second strand layer is then coated with a polymer compound to obtain the second strand layer 3B. This is the state of FIG.
[0098]
Next, a third strand layer 3C (the outermost layer in the embodiment) is formed. This step creates the required number (26 in this example) of strands 3c as the first step. The strand 3c is composed of a plurality of strands 301 and 301 ′ having the same diameter (seven in the drawing), and the strand diameter is equal to or moderately equal to the strand of the side strand 2b of the core schunkel 2. small. The twist direction is opposite to the strand 3b of the second strand layer 3B, and therefore, the same direction (Z direction) as that of the strand 3a of the first strand layer 3A.
[0099]
The required number of strands 3c are arranged on the outer periphery of the second strand layer 3B, and the fiber strips 15 are arranged between the valleys of the strands 3c and twisted. The twisting direction at this time is the direction opposite to the twisting direction of the second strand layer 3B (S direction). Thus, a raw third strand layer is obtained. Next, this elementary third strand layer is coated with a polymer compound to obtain a third strand layer 3C. This is the state of FIG. 33, and the elementary rope 1 'is completed. The entire elementary rope 1 'is finally covered with a polymer compound to form an outer covering layer 6'.
[0010]
In addition to the case where there are three layers of the first strand layer 3A to the second strand layer 3C, it may be two layers or four layers or more, and the number of strands constituting each strand layer is not limited to seven, Three or four may be used.
Further, although the coating of the outermost layer strand 3 </ b> C is a double coating of the individual coating 6 and the exterior coating 6 ′, it may be a single overall coating.
[0101]
The rope of the fourth aspect includes various other structures. Examples are as follows.
(1) (7 × 12) + 13 × 12 + 20 × 12 + 27 × 12
(2) {7 × (3 + 9)} + 13 × (3 + 9) + 20 × (3 + 9) + 27 × (3 + 9)
(3) (7 × 19) + 13 × 19 + 20 × 19 + 27 × 19
(4) (7 × 27) + 13 × 27
(5) {7 × (3 + 9 + 15)} + 13 × (3 + 9 + 15)
(6) (7 × 27) + 13 × 27 + 20 × 27
(7) {7 × (3 + 9 + 15)} + 13 × (3 + 9 + 15) + 20 × (3 + 9 + 15)
[0102]
[Action]
[Common to each aspect]
Since the composite wire rope of the present invention has a small elongation of 4 to 6%, it is suitable for elevators and cargo handling. Flexibility is easy to bend because the conventional fiber core type is 600 to 700, but is 1000 to 1800. The elastic modulus is 40000-60000 N / mm for the conventional fiber core type.²In contrast to 74,000 N / mm²As described above, this is also a characteristic suitable for elevators and cargo handling. In the S bending fatigue test, D / d = 20, SF = 10, that is, the conventional fiber core type is 20000 to 40,000 times under the test conditions with a load of 1/10 of the calculated breaking load. It exhibits extremely high fatigue resistance exceeding 400,000 times.
In addition, a large number of strands made of high-strength steel wire with a small diameter are twisted into a composite structure consisting of these and fiber strips. Unlike ropes made of fiber rope, they cannot be cut easily with sharp blades. It is safe without being easily broken by shearing force or shearing flaws.
[0103]
[About the first aspect]
The rope is composed of a core sunkel 7 and side schenkel 8 by twisting a number of strands made of high-strength steel wire with a small diameter, so the required strength can be achieved while reducing the diameter of the rope and reducing the weight. can do.
Furthermore, since good fatigue properties can be realized, the diameter of the sheave can be reduced. That is, for example, since the rope weight including the covering can be reduced by 20% or more compared to the conventional one, the sheave diameter SD can be reduced to 50% or less compared to the conventional one. Further, since the torque of the motors that drive the sheave can be reduced by downsizing the sheave, the dimensions can be reduced. Moreover, since the weight of the rope can be reduced, the capacity of the motors can be reduced. When used in a crane, the crane can be reduced in size.
[0104]
Moreover, an inner layer side fiber strip 11 whose outer periphery is coated with a polymer compound is arranged in a space surrounded by the core schenkel 7 and the side schenkel 8, and a polymer surrounded in the space surrounded by the side schenkel 8 and the rope circumscribed circle. Since the outer layer side fiber strip 12 whose outer periphery is coated with a compound is arranged, and the inner layer side fiber strip 11 and the outer layer side fiber strip 12 are twisted into the core Schenkel 7 and the side Schenkel 8 in the final twisting step, The arrangement of the side schenkels 8 and 8 is stable, there is no bias, and the strength per unit area of the rope can be improved without increasing the rope diameter. Weight can be reduced.
[0105]
The core schenkel 7 and the side schenkel 8 are advantageous in terms of cost because they have the same specifications except that the twisting directions are opposite. That is, by applying the polymer compound coating 9 only to the core shunkel 7 to increase the outer diameter, a gap can be formed between the side schenkels. It becomes easy for the polymer compound to enter the inside through the gap. The gap dimension between the side schenkels can be easily controlled simply by changing the coating diameter, that is, the thickness of the polymer compound coating 9, without changing the diameter of the core shunkel 7.
[0106]
The core shunkel 7 has a polymer compound coating 9, a side schenkel 8 is arranged around the polymer compound coating 9, and the outer periphery is surrounded by a polymer compound in a space surrounded by the core schenkel 7 and the side schenkel 8. Since the inner layer side fiber strip 11 coated with the outer layer side fiber strip 12 with the outer periphery coated with the polymer compound is disposed in the space surrounded by the side schenkel 8 and the rope circumscribed circle, each side Metal contact between the schenkels 8 and 8 can be prevented, thereby improving fatigue and improving the rope life.
[0107]
Further, by increasing the diameter of the core sunkel 7 by the amount of the polymer compound coating 9, it is possible to form a gap between the side schenkels 8 and 8 where the polymer compound of the entire coating layer 10 is easy to permeate and fill. Even when the polymer compound of the entire coating layer 10 is insufficiently filled between the side schenkels 8 and 8, the side schenkels 8 and 8 are connected to each other by the inner layer side fiber strips 11 and the outer layer side fiber strips 12 coated with the polymer compound. Can prevent direct metal contact. Therefore, it is not necessary to form the entire covering 10 strictly, and the process becomes easy.
[0108]
Further, the outer surface of the rope is covered with the outer covering 10, and the outer covering layer is harder than the sheave 4, so that the sheave can be prevented from being worn, and the friction coefficient can be freely selected by selecting a polymer compound. Since the groove of the sheave is sufficient as a round groove, the cost can be reduced. Nevertheless, the rotational movement of the sheave due to the rotation of the motor can be accurately transmitted to the rope, and the rotational movement of the sheave and the vertical movement of the car can be linked well to perform precise position control of the car, improving the ride comfort. . Moreover, since the rope cross section has a circular shape, the influence of rotation and twist (partial disconnection due to one load) is reduced.
Furthermore, since it can be made non-lubricated, it is possible to save the labor and to prevent the oil from adhering to the drum and sheave and to scatter around the machine, so that machines such as machine rooms and cranes can be cleaned.
[0109]
[About the second aspect]
The basic operation of the second aspect is the same as that of the first aspect, and it is used by replacing the side schenkel with the side strand to describe the specific action.
Since the second mode is a strand shape using the side strands 8 ′, the number of strands to be used is increased, so that the cross-sectional shape of the rope can be made more round. Thereby, when the finished rope is used, the surface pressure applied to the exterior covering 10 interposed between the side strand and the sheave can be reduced. As a result, it is possible to extend the life of the exterior covering 10 and the rope having the same, and the deformation of the exterior covering 10 is reduced, so that vibration can be reduced when applied to an elevator.
[0110]
Since the cross-sectional density of the steel material can be made higher than that of the cable raid rope of the first aspect, the same strength as that of the cable raid rope can be obtained even if the rope diameter is small. Can be reduced, and handling is improved. In addition, even when the exterior coating has the same thickness, the amount of the polymer compound can be reduced, and the cost can be reduced. When the rope is set to have the same life, it is possible to reduce the sheave diameter and the power system.
[0111]
Moreover, since the side strand 8 'can be twisted at once with a twister having a large number of flyers, the number of twisting steps can be reduced.
Since a plurality of strands are not formed and twisted as in the case of the cable raid side schenkel, the fretting of each strand can be reduced, thereby improving the life reduction due to wear. In particular, fretting can be further reduced and the life can be extended by adopting parallel twist or the like.
[0112]
In the third aspect, the core structure is also composed of the strands 7 ′, and the core strands 7 ′ and the side strands 8 ′ may have the same structure in which the twist directions are different, so that the manufacturing process is shortened and the cost is reduced. .
[0113]
In the example of FIG. 17 of the fourth embodiment, the central twisted core body is composed of the core strand 20 and has the polymer compound coating 4, and the polymer compound coating 4 is provided around the polymer compound coating 4. A first strand layer 30A and a second strand layer 30B having a polymer compound coating 6 are disposed, and twisted layers 30C, 30D, and 30E each having a polymer compound coating 6 are disposed on the outer periphery thereof. Therefore, the fiber strip 15 coated with a polymer compound or the like is not provided between the twisted layers 30c, 30D, and 30E of the twisted layers 30C, 30D, and 30E. Since they are arranged alternately, the twisted bodies do not make metal contact with each other, and fretting is prevented by these, so that the rope life can be improved. In addition, since the outer surface of the rope is covered with the outer covering layer 6, the rope does not come into metal contact with the sheave or drum, and wear of both is reduced, thereby also extending the life of the rope, sheave or drum. it can.
[0114]
According to the example of FIG. 27 of the fourth embodiment, the core schunkel 2 has the polymer compound coating 4, and the first twisted union layer 3 A having the polymer compound coating 6 is disposed around the polymer compound coating 4. Then, the second twisted union layer 3B having the same polymer compound coating 6 is arranged on the outer periphery of the first twisted union layer 3A, and the third twisted union layer 3C having the same polymer compound covering 6 on the outer periphery thereof. Since each layer is not touched by metal, and the fiber strip 15 covered with a polymer compound is disposed between the valleys of each twisted body layer, The metal contact is also prevented, thereby preventing fretting and improving the life of the rope. Furthermore, since the outer surface of the rope is covered with the outer covering layer 6 ', the rope does not come into metal contact with the sheave or the drum, and wear of both is reduced, thereby also extending the life of the rope, the sheave or the drum. Can do.
[0115]
In any of the above examples, strands with a small number of strands or strands are twisted in layers, so by increasing or decreasing the number of layers of strands with a small number of strands or strands or by selecting the number of strands constituting the strand, A long-life rope having a desired diameter and strength can be freely made.
[0116]
Moreover, in the example of FIG. 27, about two types are sufficient as the diameter of the strand used, and the same specification (twisting direction, twist pitch) as the side strand 2b of the core schenkel 2 and the second twisted body layer 3B. Since the thing with the same specification (twist direction, twist pitch) can be used as the twisted product of the first twisted composite layer 3A and the third twisted composite layer, the manufacturing process is shortened and the manufacturing cost is reduced. be able to.
[0117]
Also in the example of FIG. 17, about two types are sufficient as the diameter of the strand used similarly, and the same specification (twisting direction, twist pitch) as the twisted body of the first twisted body layer 30C and the third twisted body layer 30E Manufacturing cost can be reduced.
Moreover, it can be set as a rope with very small rotation property by changing a twist direction alternately. Thereby, since rotation on a sheave decreases at the time of use, wear of the rotation direction of a sheave and a rope can be reduced. Moreover, since the shear stress between the strand due to rotation and the polymer compound of the coating material can be reduced, wear and deterioration of the polymer compound can be suppressed. Moreover, when applied to a crane rope, rotation of a suspended load can be suppressed.
[0118]
【Example】
Example 1
A rope of the first aspect was produced.
(1) Wire
A high carbon steel wire rod having a diameter of 5.5 mm (C: 0.82%, Si: 0.21%, Mn: 0.48% balance iron and inevitable impurities) was used as a raw material.
This steel wire was drawn in the next step to obtain a strand.
After pickling, cold drawing is performed 10 times to obtain a wire diameter of 2.0 mm, and this is subjected to air patterning at about 980 ° C., and after pickling, the wire drawing is performed for about 6 passes to obtain a wire diameter of 1 .2 mm, heated at about 980 ° C., lead patented at about 550 ° C., pickled, hot water washed, electrogalvanized, and wet-drawn with an aqueous type lubricant for about 20 passes A strand having a final diameter of 0.20 mm to 0.21 mm was obtained. Each strand has a tensile strength of 320kg / mm²The elongation at break was 2%.
[0119]
(2) Manufacture of core Schenkel
2-1) Core Schenkel core strand manufacturing process
First step: 1 + 6
One core strand having a diameter of 0.208 mm and six side strands having a diameter of 0.205 mm were twisted in the Z direction at a twist pitch of 6.3 mm to form an inner layer having an outer diameter of 0.62 mm.
Second step: (1 + 6) +12
Around the inner layer (1 + 6), 12 side strands having a diameter of 0.205 mm for the outer layer were arranged and twisted in the Z direction at a twist pitch of 10 mm to obtain a core strand having an outer diameter of 1.03 mm.
[0120]
2-2) Manufacturing process of side strand of core Schenkel
First step: 1 + 6
One core strand having a diameter of 0.205 mm and six side strands having a diameter of 0.202 mm were twisted in the S direction at a twist pitch of 6.3 mm to obtain an inner layer having an outer diameter of 0.61 mm.
Second step: (1 + 6) +12
Around the inner layer (1 + 6), 12 side strands having a diameter of 0.202 mm were arranged and twisted in the S direction at a twist pitch of 10.00 mm to obtain a side strand having an outer diameter of 1.01 mm.
[0121]
2-3) Core Schenkel Twisting Step {(1 + 6) +12} + 6 × {(1 + 6) +12} Six core Schenkel strands (diameter 1) around the one core Schenkel core strand (diameter 1.03 mm) .01 mm) and twisted in the Z direction at a twist pitch of 22.00 mm to obtain a core schenkel with an outer diameter of 3.04 mm.
[0122]
(3) Core Schenkel coating
Molten polyethylene was extruded with an Extruder and coated on the core Schenkel (diameter 3.04 mm) with a thickness of 0.30 mm to obtain a resin-coated core Schenkel with a finished diameter of 3.64 mm.
[0123]
(4) Production of side Schenkel
4-1) Manufacturing process of the side schenkel core strand
First step: 1 + 6
Six side strands having a diameter of 0.205 mm were arranged around a single core strand having a diameter of 0.208 mm, and twisted in the S direction at a twist pitch of 6.3 mm to obtain an inner layer having an outer diameter of 0.62 mm. .
Second step: (1 + 6) +12
Twelve side strands having a diameter of 0.205 mm were arranged on the inner layer and twisted in the S direction at a twist pitch of 10 mm to obtain a core strand having an outer diameter of 1.03 mm.
[0124]
4-2) Side Schenkel side strand manufacturing process
First step: 1 + 6
Six side strands having a diameter of 0.202 mm were arranged around a core strand having a diameter of 0.205 mm, and twisted in the Z direction at a twist pitch of 6.3 mm to obtain an inner layer having an outer diameter of 0.61 mm.
Second step: (1 + 6) +12
Twelve strands having a diameter of 0.202 mm were arranged on the inner layer and twisted in the Z direction at a twist pitch of 10.00 mm to obtain a side strand having an outer diameter of 1.01 mm.
[0125]
4-3) Side Schenkel Twisting Step {(1 + 6) +12} + 6 × {(1 + 6) +12}
Six core Schenkel side strands (diameter 1.01 mm) are arranged around one core Schenkel core strand (diameter 1.03 mm), and twisted in the S direction at a pitch of 22.0 mm, outer diameter 3.04 mm Got the side Schenkel.
[0126]
(5) Fabrication of fiber insert
5-1) Inner layer side fiber strip manufacturing process
Using a para-aramid fiber, this was made into the structure shown in FIG. 10 (a) and composited with a modified epoxy resin to obtain a main body having an outer diameter of 0.49 mm. The main body was extruded with molten polyethylene using an extruder and coated with a thickness of 0.05 mm to obtain a resin-coated fiber with a finished diameter of 0.59 mm.
[0127]
5-2) Manufacturing process of outer side fiber strip
Similarly, a para-aramid fiber was used, and this was made into the structure shown in FIG. 10 (a) and composited with a modified epoxy resin to obtain a main body having an outer diameter of 1.01 mm. The main body was extruded with molten polyethylene using an extruder and coated with a thickness of 0.1 mm to obtain a resin-coated fiber strip with a finished diameter of 1.21 mm.
[0128]
(6) Rope twisting process
Using a tubular type twisted wire machine, six coated inner layer side fiber strips are arranged at equal intervals around the coated core schenkel, and six side schenkels are arranged in each interval of the coated inner layer side fiber strips. Then, 6 coated outer layer side fiber strips were arranged between the valleys of these side schenkels and twisted in a twisting pitch of 70.0 mm and a twisting direction Z to obtain a bare rope having an outer diameter of 9.73 mm.
[0129]
(7) Typing and leveling
A twisting machine is equipped with a stylized device with three rolls with a diameter of 10.0 mm arranged in a staggered manner, and 9 + 10 pairs of leveling rolls with a diameter of 60 mm and a pair are arranged downstream of the voice. In other words, the molding was performed with an average molding rate of about 70%.
[0130]
(8) Overall coating
Molten polyurethane was covered with an extruder to a thickness of 0.50 mm on the unfinished and roped rope, and a finished rope having a diameter of 10.73 mm was obtained. The cross-sectional density of the steel material of the obtained rope was 33.2% (steel material + fiber was 39.8%), the surface friction coefficient was 0.3 μm, and the breaking load was 69 kN.
For comparison, when a rope having the above specifications was manufactured except that the coated inner layer side fiber strip and the coated outer layer side fiber strip were not used, the breaking load was 63 kN, and the present invention has significantly higher strength than this. I found that it was improved.
[0131]
When three ropes of the present invention were used in a simulated elevator with a car and a counterweight weight of 2 tons, a round grooved sheave with a diameter of 150 mm, three grooves and a groove R5.25 mm was used, and it operated smoothly with a safety factor of 10. We were able to.
[0132]
Example 2
The rope of the second aspect was manufactured by applying the present invention.
The stranding conditions are as follows: cold drawing for about 4 passes in the secondary drawing process to change the wire diameter from 2.0 mm to 1.65 mm, and final drawing to 0.290 to 0.310 mm. The same as the embodiment.
[0133]
(1) Manufacture of core Schenkel
1-1) Manufacturing process of core Schenkel core strand
First step: 1 + 6
One core wire having a diameter of 0.310 mm and six side strands having a diameter of 0.310 mm were twisted in the S direction at a twist pitch of 15.0 mm to form a core strand having an outer diameter of 0.93 mm.
[0134]
1-2) Manufacturing process of core Schenkel side strand
First step: 1 + 6
One core strand having a diameter of 0.290 mm and six side strands having a diameter of 0.290 mm were twisted in the S direction at a twist pitch of 15.0 mm to obtain a side strand having an outer diameter of 0.87 mm.
[0135]
1-3) Core Schenkel twisting process (1 × 12) + 6 × (1 × 12)
Six core Schenkel side strands were arranged around one core Schenkel core strand and twisted in the Z direction at a twist pitch of 22.0 mm to obtain a core Schenkel having an outer diameter of 2.67 mm.
[0136]
(2) Core Schenkel coating
Molten polyethylene was extruded with an extruder and the core Schenkel was coated with a thickness of 0.30 mm to obtain a resin-coated core Schenkel with a finished diameter of 3.27 mm.
[0137]
(3) Production of side strands
3-1) First step: 1 × 3
Three strands having a diameter of 0.300 mm were twisted and twisted in the Z direction at a twist pitch of 8.0 mm to obtain a core portion (first layer) having an outer diameter of 0.65 mm.
3-2) Second step: first layer + second layer
Nine strands having a diameter of 0.300 mm were arranged around the first layer, and twisted in the Z direction at a twist pitch of 16.0 mm to obtain a multilayer twisted body having an outer diameter of 1.25 mm.
[0138]
3-3) Third step: first layer + second layer + third layer
Fifteen strands having a diameter of 0.300 mm were arranged around the second layer and twisted in the S direction at a twist pitch of 22.0 mm to obtain a side strand having a diameter of 1.85 mm.
[0139]
(4) Fabrication of fiber insert
4-1) Inner layer side fiber strip manufacturing process
Using a para-aramid fiber, the structure shown in FIG. 10A was made into a composite with a modified epoxy resin to obtain a main body having an outer diameter of 0.32 mm. The main body was extruded with molten polyethylene using an extruder and coated with a thickness of 0.05 mm to obtain a resin-coated fiber strip with a finished diameter of 0.42 mm.
[0140]
5-2) Manufacturing process of outer side fiber strip
Similarly, a para-aramid fiber was used, which had the structure shown in FIG. 10 (a) and was composited with a modified epoxy resin to obtain a main body having an outer diameter of 0.54 mm. The main body was extruded with molten polyethylene using an extruder and coated with a thickness of 0.1 mm to obtain a resin-coated fiber strip with a finished diameter of 0.72 mm.
[0141]
(5) Rope twisting process
Using a tubular type twisted wire machine, eight coated inner layer side fiber strips are arranged at equal intervals around the coated core schenkel, and eight side strands are provided in each interval of the coated inner layer side fiber strips. Then, eight coated outer layer side fiber strips were arranged between the valleys of these side strands, and twisted in a twisting pitch of 50 mm and a twisting direction Z to obtain a bare rope having an outer diameter of 6.97 mm. Note that the shaping and leveling were performed under the same conditions as in the first example, using three rolls with a diameter of 8.0 mm and leveling rolls with a diameter of 50 mm.
[0142]
(6) Overall coating
Molten polyurethane was covered with an extruder to a thickness of 0.50 mm on the shaped and leveled elemental rope to obtain a finished rope having a diameter of 7.97 mm. The obtained rope had a steel cross-sectional density of 37.2% (steel material + fiber was 42.2%), a surface friction coefficient of 0.3 μm, and a breaking load of 43 kN.
For comparison, when a rope having the same specification was used except that the coated inner layer side fiber strip and the coated outer layer side fiber strip were not used, the breaking load was 40 kN, and the present invention is significantly stronger than this. I found that it was improved.
[0143]
When three ropes of the present invention were used in a simulated elevator with a car and a counterweight weight of 2 tons, a round grooved sheave with a diameter of 150 mm, three grooves and a groove R5.25 mm was used, and it operated smoothly with a safety factor of 10. We were able to.
[0144]
Example 3
The present invention was applied to manufacture a rope for moving cords having a (1 × 37) + 26 + 32 + 40 + 46 + (4 × 24) + (4 × 30) + (4 × 38) structure according to the fourth embodiment.
The stranding conditions are as follows: cold drawing for about 5 passes in the secondary drawing process to change the wire diameter from 2.0 mm to 1.40 mm, and 0.250 to 0.260 mm for the final drawing of about 20 passes. In addition, the second embodiment is the same as the first embodiment.
[0145]
(1) Production of coated core strand
1-1) 1st process: 1 + 6 (core part)
One core strand having a diameter of 0.260 mm and six side strands having a diameter of 0.260 mm were twisted in the S direction at a twist pitch of 12.5 mm to form a core portion having an outer diameter of 0.78 mm.
1-2) Second step: (1 + 6) + 12-first side layer
Twelve strands having a diameter of 0.250 mm were arranged around the core portion (1 + 6), and twisted in the S direction at a twist pitch of 12.5 mm to obtain a first side layer having an outer diameter of 1.28 mm.
[0146]
1-3) Third step: first side layer + 18-second side layer
Around the first side layer, 18 side strands having a diameter of 0.250 mm were arranged, and twisted in the S direction at a twist pitch of 12.5 mm to obtain a second side layer having an outer diameter of 1.78 mm.
1-4) Coating process
Molten polyethylene was extruded with an extruder, and the third side layer was coated with a thickness of 0.25 mm to obtain a coated core strand with a finished diameter of 2.28 mm.
[0147]
(2) Production of the first strand layer
2-1) 1st process: Coated core strand +26-1st layer
Twenty-six strands having a diameter of 0.250 were arranged around the coated core strand, and twisted in the Z direction at a twist pitch of 22.0 mm to obtain a first layer having an outer diameter of 2.78 mm.
2-2) Second step: first layer + 32-second layer
32 strands having a diameter of 0.250 mm are arranged around the first layer and twisted in the Z direction at a twist pitch of 22.0 mm to obtain a second layer (element first strand layer) having an outer diameter of 3.28 mm. It was.
2-3) Coating process
Molten polyethylene was extruded using an extruder, and the second layer was coated with a thickness of 0.25 mm to obtain a coated first strand layer having a finished diameter of 3.78 mm.
[0148]
(3) Production of the second strand layer
3-1) First step: coated first strand layer + 40—first layer
40 strands having a diameter of 0.250 were arranged around the coated first strand layer, and twisted in the S direction at a twist pitch of 32.0 mm to obtain a first layer having an outer diameter of 4.28 mm.
3-2) Second step: first layer + 46-second layer
46 strands having a diameter of 0.250 mm are arranged around the first layer and twisted in the S direction at a twist pitch of 32.0 mm to obtain a second layer (element second strand layer) having an outer diameter of 4.78 mm. It was.
3-3) Coating process
Molten polyethylene was extruded with an extruder, and the second layer was coated with a thickness of 0.25 mm to obtain a coated second strand layer having a finished diameter of 5.28 mm.
[0149]
(4) Production of first fiber composite strand layer
4-1) Strand production process: 1 × 4
Four strands having a diameter of 0.250 mm were twisted in a twisting pitch of 12.5 mm and a twisting direction S direction to obtain a strand having an outer diameter of 0.60 mm.
4-2) Fabrication process of fiber insert
Using a para-aramid fiber, the structure shown in FIG. 10A was made into a composite with a modified epoxy resin to obtain a main body having an outer diameter of 0.50 mm. The main body was extruded with molten polyethylene using an extruder and coated with a thickness of 0.05 mm to obtain a resin-coated fiber strip with a finished diameter of 0.60 mm.
[0150]
4-3) Twisting process:
4-1) The strands obtained in the process of step 4-1) are arranged around the coated second strand layer, the resin-coated fiber bodies (12 pieces) are arranged between the strands, and the twist pitch is 45.0 mm. The strands were twisted in the direction Z to obtain an elementary first strand layer having an outer diameter of 6.48 mm.
4-4) Coating step:
Molten polyethylene was extruded using an extruder, and the first strand layer was coated with a thickness of 0.25 mm to obtain a coated fiber composite first strand layer having a finished diameter of 6.98 mm.
[0151]
(5) Production of second strand layer
5-1) Strand production process: 1 × 4
Four strands having a diameter of 0.250 mm were twisted in a twisting pitch of 12.5 mm and a twisting direction of Z to obtain a strand having an outer diameter of 0.60 mm.
5-2) Fabrication process of fiber insert
Using a para-aramid fiber, the structure shown in FIG. 10A was made into a composite with a modified epoxy resin to obtain a main body having an outer diameter of 0.50 mm. The main body was extruded with molten polyethylene using an extruder and coated with a thickness of 0.05 mm to obtain a resin-coated fiber strip with a finished diameter of 0.60 mm.
[0152]
5-3) Twisting process
The strands obtained in the step 5-1) are arranged around the coated first strand layer, 15 resin-coated fiber strips (15) are arranged between the strands, and the twist pitch is 58.0 mm. The strands were twisted in the direction S to obtain an elementary second strand layer having an outer diameter of 8.18 mm.
5-3) Coating step:
Molten polyethylene was extruded with an extruder, and the raw second strand layer was coated with a thickness of 0.25 mm to obtain a coated second strand layer with a finished diameter of 8.68 mm.
[0153]
(6) Production of third strand layer
6-1) Strand production process: 1 × 4
Four strands having a diameter of 0.250 mm were twisted in a twisting pitch of 12.5 mm and a twisting direction S direction to obtain a strand having an outer diameter of 0.60 mm.
6-2) Fabrication process of fiber insert
Using a para-aramid fiber, the structure shown in FIG. 10A was made into a composite with a modified epoxy resin to obtain a main body having an outer diameter of 0.50 mm. The main body was extruded with molten polyethylene using an extruder and coated with a thickness of 0.05 mm to obtain a resin-coated fiber strip with a finished diameter of 0.60 mm.
6-3) Twisting process
6-1) 19 strands are arranged around the coated second strand layer, resin coated fiber strips (19) are arranged between the strands, twist pitch 70.0 mm, twist direction Twisting was performed in the Z direction to obtain an elementary third strand layer having an outer diameter of 9.88 mm.
[0154]
In addition, the twisted wire work of each said layer uses a tubular type twisted wire machine, uses 3 rolls of staggered arrangement with a diameter of 8.0 mm as a shaping device, and 9 + 10 leveling rolls with a diameter of 50 mm as a straightening roll Was used for leveling and averaged about 70%.
[0155]
(7) Exterior coating process
The raw third strand layer was coated with molten polyurethane to a thickness of 0.50 mm with an extruder to obtain a finished rope with a diameter of 10.88 mm. The obtained rope had a steel cross-sectional density of 29.0% (steel material + fiber 29%), a surface friction coefficient (μ) of 0.3, and a breaking load of 59 kN.
[0156]
When three ropes of the present invention obtained as described above were used in a simulated elevator with a car and a counterweight having a weight of 2 tons, a sheave with a round groove having a diameter of 150 mm, three grooves and a groove R5.25 mm was used. It was possible to drive smoothly with a safety factor of 10.
[0157]
【The invention's effect】
  According to the first aspect of the present invention described above, a large number of thin strands of high-strength material are twisted, so that it is possible to obtain a rope satisfying the required strength with a small diameter with good fatigue properties. A high-performance fiber body having a high elastic modulus of 20 g / d or more and a high strength of 500 g / d or more and a coating layer provided on the outer periphery thereof between the twisted bodies surrounded by the circumscribed circle of the side layer Because it is filled with a fiber strip made of, it is lightweight, has high strength, high elastic modulus and resistance to bending fatigue, and does not increase the rope diameter and increase weight due to characteristics such as low elongation and wear resistance. In addition, the strength per unit area can be increased.
[0158]
In addition, the outer periphery of the side layer is provided with an exterior coating made of a polymer compound, and since this portion comes into contact with the sheave, the wear of the sheave can be prevented, and the coating polymer compound increases the friction coefficient. There is no need for special groove processing of the sheave or double wrapping of the rope against the sheave. In particular, since the force acting on the sheave shaft can be reduced by eliminating the need for a double wrap, it is possible to reduce the size of the shaft and the bearing, thereby reducing the cost.
[0159]
  According to claim 2, there is further provided a high-performance fiber main body having a high elastic modulus of 20 g / d or more and a high strength of 500 g / d or more between the outer periphery of the core and each twisted combination of the side layers. Since the fiber strip 11 made of the coating layer provided on the outer periphery of the filler is filled, direct metal contact between the twisted bodies constituting the side layer can be reliably prevented, and thus the side layer is configured. The fretting between the twisted bodies is alleviated, thereby improving the fatigue property and improving the life of the rope.
[0160]
According to the fourth aspect, since the core portion is composed of the combination of the core schenkel 7 and the side strand 8 ′, in addition to the above-described effects, first, the steel material cross-sectional density can be increased. Even if the rope diameter is small, high strength can be obtained, thereby improving handling properties, reducing the amount of polymer compound as a coating material, and further reducing the sheave diameter and power system. Can do. Secondly, since the side strands 8 'are used, the cross-sectional shape thereof can be rounded, thereby reducing the surface pressure applied to the exterior covering interposed between the sheave and the exterior. Since the life of the coating can be extended and the deformation of the exterior coating is reduced, vibration can be reduced when applied to an elevator. Thirdly, since the side is not a Schenkel type (a strand is further twisted) but a strand type, fretting can be reduced and life reduction due to wear can be improved.
[0161]
According to claim 5, since the core portion is a combination of the core strand 7 ′ and the side strand 8 ′, in addition to the above-described effects, the core strand and the side strand may have the same structure with different twist directions. The manufacturing process is simplified, and the excellent effect that the manufacturing cost can be reduced is obtained.
[0162]
  According to the sixth aspect, the core portion obtained by twisting the strands and coating the outer periphery with the polymer compound, the twisted body obtained by twisting a plurality of strands, the high elastic modulus of 20 g / d or more, 500 g / d A multi-layer twist comprising a plurality of composite layers in which the main body of the high-performance fiber having the above-mentioned high strength and the fiber strip having the outer coating layer are alternately arranged on the circumference, and the outer circumference is coated with the polymer compound. Since it is a rope, in addition to the effect of Claim 1, it can also reduce the fretting of a core part and the outer periphery twisted body layer, and the fretting for every twisted body layer, and also comprises each twisted body layer Fretting between twisted bodies can be prevented. For this reason, the fatigue property is excellent and the rope life can be improved. Moreover, the outstanding effect that the rope diameter and intensity | strength which respond | corresponded to use conditions can be adjusted easily by the increase / decrease in the twisted-bonded layer surrounding a core part is acquired.
  According to the seventh aspect, it is possible to obtain an excellent effect that the weight can be further reduced.
  According to the ninth aspect, since fretting is reduced even in the core portion, an excellent effect is obtained that it is possible to improve the life reduction due to wear.
  According to the tenth aspect, it is possible to obtain an excellent effect that it is possible to provide a highly practical elevator rope capable of saving the space of the system and reducing the cost.
[Brief description of the drawings]
FIG. 1A is an explanatory view schematically showing an example of an elevator to which a composite rope of the present invention is applied, and FIG. 1B is an explanatory view showing an example of a crane to which a rope of the present invention is applied.
FIG. 2 is a partially cutaway perspective view showing a first aspect of the rope of the present invention.
FIG. 3 is an enlarged cross-sectional view of FIG.
4A is a cross-sectional view showing a first step of manufacturing a core schenkel core in the first embodiment, and FIG. 4B is a cross-sectional view showing a second step in the same manner.
5A is a cross-sectional view showing a first step of manufacturing a side strand of the core schenkel in the first embodiment, and FIG. 5B is a cross-sectional view showing a second step in the same manner.
6A is a cross-sectional view of the core schenkel in the first embodiment, and FIG. 6B is a cross-sectional view of the core schenkel after coating.
7A is a cross-sectional view showing a first step of manufacturing a side Schenkel core strand in the first embodiment, and FIG. 7B is a cross-sectional view showing a second step in the same manner.
8A is a cross-sectional view showing a first step of manufacturing a side strand of a side schenkel in the first embodiment, and FIG. 8B is a cross-sectional view showing a second step in the same manner.
FIG. 9 is a cross-sectional view of the side schenkel of the first embodiment.
FIGS. 10A to 10H are partial perspective views showing examples of fiber strips used in the present invention. FIGS.
FIG. 11 is an enlarged cross-sectional view of a second aspect of the present invention.
12A is a cross-sectional view of the core strand of the core schenkel in the second embodiment, and FIG. 12B is a cross-sectional view of the side strand of the core schenkel.
FIG. 13A is a cross-sectional view of a core schenkel, and FIG. 13B is a cross-sectional view of a coated core schenkel.
14A, 14B, and 14C are cross-sectional views showing stepwise formation of side strands in the second embodiment.
FIG. 15 is an enlarged cross-sectional view of a third aspect of the present invention.
FIG. 16 is a partial perspective view of a fourth aspect of the present invention.
FIG. 17 is an enlarged sectional view of a fourth embodiment.
18A is an enlarged cross-sectional view of the core portion of the core strand in the fourth embodiment, FIG. 18B is a cross-sectional view of the state in which the first side layer is twisted, and FIG. 18C is a twist of the second side layer. (D) is sectional drawing of a covering core strand.
19A is a cross-sectional view showing a state in which the first layer of the first strand layer is obtained, and FIG. 19B is a cross-sectional view showing a completed state of the coated first strand layer.
FIG. 20 is a cross-sectional view showing a state where a coated second strand layer is obtained.
FIG. 21 is a cross-sectional view showing a completed state of the first composite strand layer.
FIG. 22 is a cross-sectional view showing a completed state of the second composite strand layer.
FIG. 23 is a cross-sectional view of a state where a third strand layer is twisted and coated.
FIG. 24 is an enlarged sectional view showing another example of the first aspect.
FIG. 25 is an enlarged sectional view showing another example of the first aspect.
FIG. 26 is an enlarged sectional view showing another example of the second mode.
FIG. 27 is a partial perspective view showing another example of the fourth aspect.
FIG. 28 is an enlarged cross-sectional view of the rope of FIG. 27.
29A is a cross-sectional view showing a twisted state of the inner fiber strip of the first example, and FIG. 29B is a cross-sectional view showing a coated state.
30A is a cross-sectional view of a core schenkel, and FIG. 30B is a cross-sectional view of a coated core schenkel.
FIG. 31A is a cross-sectional view showing a state in which the first composite strand layer is obtained in the first embodiment, and FIG. 31B is a cross-sectional view showing a state in which the first composite strand layer is completed.
FIG. 32 is a cross-sectional view of the completed state of the second composite strand layer.
FIG. 33 is a sectional view showing a state in which a third composite strand layer is applied.
[Explanation of symbols]
1 Composite wire rope
7 Coated core Schenkel
7a core Schenkel core strand
7b Core Schenkel side strand
7 'coated core strand
8 side Schenkel
8a Schenkel core strand
8b Schenkel side strand
8 'strand
4,6,9 Polymer compound coating
6 ', 10 exterior covering
11 Inner layer side fiber strip
12 Outer layer side fiber strip
13 Body
14 Coating layer
15 Fiber strip

Claims (10)

A composite wire rope comprising a wire rope using a high-strength steel strand having a tensile strength of 280 kg / mm ² or more and having the following configuration.
(A) a core portion obtained by twisting strands and coating the outer periphery with a polymer compound;
(B) at least one side layer composed of a plurality of twisted bodies that are arranged on the outer periphery of the core portion and twisted strands;
(C) A high-performance fiber body having a high elastic modulus of 20 g / d or more and a high strength of 500 g / d or more and a coating layer provided on the outer periphery thereof, and filled between each twisted body of the side layers Fiber strips,
(D) An exterior coating made of a polymer compound applied to the outer periphery of the side layer. A composite wire rope comprising a wire rope using a high-strength steel strand having a tensile strength of 280 kg / mm ² or more and having the following configuration.
(A) a core portion obtained by twisting strands and coating the outer periphery with a polymer compound;
(B) at least one side layer composed of a plurality of twisted bodies that are arranged on the outer periphery of the core portion and twisted strands;
(C) a high-performance fiber body having a high elastic modulus of 20 g / d or more and a high strength of 500 g / d or more, and a coating layer provided on the outer periphery thereof, and each of the outer periphery and the side layer of the core part A fiber strip filled between the twisted and union,
(D) A high-performance fiber body having a high elastic modulus of 20 g / d or more and a high strength of 500 g / d or more and a coating layer provided on the outer periphery thereof, and filled between each twisted body of the side layers Fiber strips,
(E) An exterior coating made of a polymer compound applied to the outer periphery of the side layer. The core portion is composed of a single coated core schenkel 7 in which a plurality of side strands 7b are arranged around a core strand 7a formed by twisting strands and the outer periphery is coated with a polymer compound coating 9. The side layer is composed of a plurality of side schenkels 8 arranged around the coated core schenkel which is formed by twisting a plurality of side strands 8b around a core strand 8a in which strands are twisted. The composite wire rope according to claim 1 or claim 2. The core portion is composed of a single coated core schenkel 7 in which a plurality of side strands 7b are arranged around a core strand 7a formed by twisting strands and the outer periphery is coated with a polymer compound coating 9. A plurality of side strands are arranged around the coated core schenkel 7 in which the side layer is formed by arranging a plurality of side strands around the core portion obtained by twisting the strands and twisting them into a plurality of layers. The composite wire rope according to claim 1 or 2, comprising 8 '. One coated core strand in which the core portion is formed by arranging a plurality of side strands around the core portion obtained by twisting the strands and twisting them in multiple layers, and applying a polymer compound coating 9 to the outer periphery. 7 ', and the side layer is formed by arranging a plurality of side strands around the core portion in which the strands are twisted together and twisting it into a multilayer, and is arranged around the coated core strand 7'. The composite wire rope according to claim 1 or 2, comprising a plurality of side strands 8 '. A multi-strand composite wire rope comprising a wire rope using a high-strength steel strand having a tensile strength of 280 kg / mm ² or more and having the following configuration.
(A) a core portion obtained by twisting strands and coating the outer periphery with a polymer compound;
(B) A fiber strip in which a coating layer is provided on the outer periphery of a high-performance fiber body having a twisted combination obtained by twisting a plurality of strands, a high elastic modulus of 20 g / d or higher, and a high strength of 500 g / d or higher. A plurality of composite layers in which and are alternately arranged on the circumference and the outer circumference is coated with a polymer compound. The multi-strand composite wire rope according to claim 6, wherein the fiber strips are alternately arranged on the same circumference as the twisted product. The multilayer twisted composite wire rope according to claim 6, wherein the fiber strips are arranged in valleys between the twisted bodies close to the circumscribed circle of the composite layer. The core portion is composed of a core schenkel in which a plurality of side strands are arranged around a core strand formed by twisting strands, and the fiber strip is in a valley between the side strands of the core portion. The multilayer twisted composite wire rope according to claim 6 arranged. The wire rope according to any one of claims 1 to 9, which is used as an elevator rope.

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