JP5872614B2 - Multi-layer fiber rope and method for producing multi-layer fiber rope - Google Patents

Description

  The present invention relates to an inner / outer layer integrated fiber rope and a method of manufacturing the same.

  As one type of fiber rope, one composed of an inner layer and an outer layer is known. In this type of fiber rope, the inner layer usually exists as a member mainly governing the tensile strength of the rope, and the outer layer mainly prevents deterioration of the inner layer fiber due to ultraviolet rays, protects the inner layer fiber from rubbing and abrasion, etc. A function as a protective layer is given. In this way, the rope composed of the inner and outer layers is gripped when used for applications such as a mooring line, a towing line, and a tow line. As this gripping method, there are a wire grip stopper and a cotter stopper which are gripped by applying pressure to an arbitrary portion of the rope. In this case, a necessary condition for the fiber rope is that the inner and outer layers are firmly adhered to each other and no deviation occurs. If deviation occurs, the outer layer may be damaged by tension and so-called skinning may occur, so that sufficient gripping force may not be obtained. With respect to such a problem, Japanese Patent Application Laid-Open No. H10-228561 discloses a technique relating to the close contact between the inner and outer layers.

Reality 7-21596

  In the technique disclosed in Patent Document 1, a low-melting yarn layer is provided between the inner and outer layers, and the low-melting yarn layer is temporarily melted by heat treatment so that the inner and outer layers are fused and integrated. It is to make it. According to the technique, the familiarity with the inner layer and the outer layer is very good, the inner layer and the outer layer can be tightly integrated over the entire surface in the circumferential direction and the longitudinal direction, and reliable gripping can be performed. Is very useful.

  The present invention provides a fiber rope capable of adjusting the bending hardness of the rope according to the user's request for the fiber rope in which the inner layer and the outer layer are fused and integrated by a member that is melted by heat treatment as described above. It aims at providing a rope and its manufacturing method.

(Configuration 1)
In a fiber rope provided with an inner layer and an outer layer, an intermediate layer is provided between the inner layer and the outer layer, and the intermediate layer is formed of two or more materials having different melting points. A multilayer fiber rope characterized in that the ratio of the material that is melted in the heat treatment step and welds the inner layer and the outer layer is changed by changing the mixing ratio of the material having a melting point lower than the heating temperature. .

(Configuration 2)
The multilayer fiber rope according to Configuration 1, wherein a material having a melting point lower than the heat treatment temperature is also formed in the outer layer.

(Configuration 3)
The multilayer fiber rope according to Configuration 1 or Configuration 2, wherein a mixing ratio of a material having a melting point lower than the heat treatment temperature is 10% or more.

(Configuration 4)
The multilayer fiber rope according to any one of configurations 1 to 3, wherein the middle layer is formed of a material having a different color from the outer layer or is colored in a different color.

(Configuration 5)
An inner layer, an outer layer, and an intermediate layer provided between the inner layer and the outer layer, wherein the intermediate layer is formed of two or more materials having different melting points, A step of fusing the inner layer and the outer layer by heat treatment at a temperature higher than at least one melting point and lower than at least one melting point among different melting points, and the heat treatment A method for producing a multilayer fiber rope, wherein the bending hardness of the rope is changed by changing the mixing ratio of the material having a melting point lower than the heating temperature in the process in the intermediate layer.

(Configuration 6)
The method for producing a multilayer fiber rope according to Configuration 5, wherein a material having a melting point lower than the heating temperature is also mixed in the outer layer, and the mixing ratio is changed.

(Configuration 7)
The method for producing a multilayer fiber rope according to Configuration 5 or Configuration 6, wherein a mixing ratio of materials having a melting point lower than the heating temperature is 10% or more.

(Configuration 8)
The method for producing a multilayer fiber rope according to any one of Configurations 5 to 7, wherein the intermediate layer is formed of a material having a color different from that of the outer layer or colored in a different color.

(Configuration 9)
An inner layer, an outer layer, and an intermediate layer provided between the inner layer and the outer layer, wherein the intermediate layer is formed of a plurality of materials having different melting points, wherein the different melting points A process of fusing the inner layer and the outer layer by heat treatment at a temperature higher than at least one melting point and lower than at least one melting point, and in the heat treatment step A method for producing a multi-layer fiber rope, wherein the bending temperature of the rope is changed by changing the heating temperature across the melting points of the plurality of materials.

  According to the multi-layer fiber rope or the method for producing a multi-layer fiber rope of the present invention, the middle layer provided between the inner layer and the outer layer is formed of two or more materials having different melting points, and at least of the different melting points, Heat treatment is performed at a temperature higher than one or more melting points and lower than at least one melting point. That is, only the “material having a melting point lower than the heat treatment temperature” dissolves and contributes to the fusion and integration of the inner layer and the outer layer. By changing it, it becomes possible to adjust the bending hardness of the rope.

The fragmentary perspective view for demonstrating the outline of the multilayer fiber rope which concerns on this invention Schematic sectional view of a multilayer fiber rope according to the present invention

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. In addition, the following embodiment is one form at the time of actualizing this invention, Comprising: This invention is not limited within the range.

(Embodiment 1)
FIG. 1 and FIG. 2 are views showing a multilayer fiber rope of this embodiment, FIG. 1 is a perspective view of a schematic part (partially shown in exploded view), and FIG. 2 is a schematic cross-sectional view. As shown in the figure, the multilayer fiber rope 1 is constituted by an inner layer rope 11, an intermediate layer 12, and an outer layer 13.

  The inner layer rope 11 is made of nylon, polyethylene, polyester, or high-strength polyethylene, polyester, high-strength nylon, aramid, ultra-high molecular weight polyethylene, aromatic polyester, or other raw yarn or yarn. A twisted structure such as striking or a combined structure such as a 1 × 8, 2 × 4, or 2 × 6 structure. What is shown is a 2 × 16 structure.

  The middle layer 12 is formed including a heat fusion yarn. As the material, nylon, polyethylene, polyester, high-strength polyethylene, polyester, high-strength nylon, aramid, ultrahigh molecular weight polyethylene, aromatic polyester, and the like are used as in the inner layer rope 11. In the multilayer fiber rope 1 of the present embodiment, two polyesters having different melting points are blended in the heat-sealing yarn used for the intermediate layer 12. One is a polyester having a melting point of 110 ° C. (hereinafter referred to as a binder polyester), and the other is a polyester having a melting point of 256 ° C. (hereinafter referred to as a regular polyester). By using spun yarn in which fibers of binder polyester (low-melting-point material fiber) and regular polyester (high-melting-point material fiber) are blended at a predetermined ratio, two polyesters with different melting points are heat-sealed. A thread is formed. The middle layer 12 is made of the blended yarn or a yarn obtained by twisting a plurality of the blended yarns such as 6 to 10. In addition to the case where all the raw yarns are made of binder polyester (low melting point material fibers), the raw yarns have a configuration in which low melting point material fibers are wrapped or bundled around relatively high melting point material fibers. There may be. A heat-sealed yarn in which two polyesters having different melting points are blended is bladed as shown in FIG. 1 on the outer periphery of the inner layer rope 11 or is wrapped in one direction or in a cross shape at a predetermined pitch. The middle layer 12 is constituted.

  The middle layer 12 of the present embodiment is colored as the middle layer 12 because the material fibers (binder polyester and / or regular polyester) are colored. The color is colored in a color different from that of the outer layer 13. With this, in the use of the multilayer fiber rope 1, when the intermediate layer 12 is exposed due to damage of the outer layer 13, the intermediate layer 12 is different from the outer layer 13. Since it is colored with a different color, it can be recognized immediately and can be used for determining the degree of damage.

  The outer layer 13 is made of nylon, polyethylene, polyester, high-strength polyethylene, polyester, high-strength nylon, aramid, ultrahigh molecular weight polyethylene, aromatic polyester, or the like as the inner layer rope 11. Moreover, in the present embodiment, like the middle layer 12, it is formed by a heat-sealing yarn obtained by blending two polyesters having different melting points. The outer layer 13 constitutes the outermost layer of the multilayer fiber rope 1 as a blade structure of 1 × 16, 1 × 24, 2 × 16, 2 × 24 or the like using the heat-sealing yarn.

  The inner layer rope 11, the middle layer 12 and the outer layer 13 are once manufactured as a coarse rope, and after being wound on a reel or before being wound, the inside is kept at a predetermined temperature, for example, 130 ° C. (binder polyester (low melting point material fiber)). It is passed through a heating tank that is held at a temperature higher than the melting point and lower than the melting point of regular polyester (high melting point material fiber). As a result, the middle layer 12 (and the outer layer 13) is heated to around 120 ° C., and the low-melting fiber of the heat-sealed yarn in which two polyesters having different melting points are mixed is dissolved. At this time, since only the low melting point material fiber portion is dissolved, the structure in the middle layer 12 (and the outer layer 13): the spiral, lattice-like or net-like skeleton can be basically kept. . The dissolution condition is controlled by the passing speed of the coarse rope if the temperature is constant. As a result, the raw yarn or yarn formed including the low melting point fiber is fused and integrated with the fiber of the inner layer rope 11 and simultaneously with the fiber of the outer layer 13 in contact with the outer periphery (in this embodiment, the outer layer). 13 also includes a low melting point material fiber, which is dissolved and fused). Therefore, when it passes through the heating tank and is cooled, the inner layer rope 11 and the outer layer 13 become an integrated rope fused to each other through the middle layer 12.

The multilayer fiber rope 1 of the present embodiment changes the bending hardness of the multilayer fiber rope 1 by changing the mixing ratio of the binder polyester (low melting point material fiber) and the regular polyester (high melting point material fiber). It is characterized by that. For example, the mixing ratio of binder polyester and regular polyester
Binder polyester: Regular polyester = 70: 30 ... A, 50:50 ... B, 30:70 ... C
When the ratio is changed, the degree of thermal fusion decreases as the mixing ratio of the binder polyester having a low melting point is reduced, so that the multilayer fiber rope 1 can be softened in the order of A <B <C.
It should be noted that when the mixing ratio of the material having a low melting point (binder polyester) is less than 10%, the adhesive ability is lowered, so that it is preferably 10% or more.

  As described above, the multilayer fiber rope 1 of the present embodiment is provided with the outer layer 13 having a braided structure on the outer periphery of the inner layer rope 11 with the middle layer 12 interposed therebetween, and the binder polyester (low-layer) contained in the middle layer 12 (and the outer layer 13). The inner layer rope 11 and the outer layer 13 are fused to each other by dissolving the melting point material fiber) in the heat treatment step, and the mixing ratio of the binder polyester contained in the middle layer 12 is changed, so that the multilayer fiber The bending hardness of the rope 1 can be changed, and a rope having a bending hardness desired by the user can be provided, which is very useful. In the present embodiment, the raw yarn itself is a mixture of a low melting point material fiber and a high melting point material fiber at a predetermined ratio. The rope manufacturing process (addition process) and the adjustment of the degree of fusion (adjustment of the mixing amount) are further simplified with respect to the twisted ones. Also, in terms of the degree of fusion, the method of this case (micro) mixed at the stage of the raw yarn has a higher degree of fusion than the method of mixing the above-mentioned normal raw yarn (macro). It is also excellent in that there is no variation and more uniformity is provided.

  Moreover, in the multilayer fiber rope 1 of this embodiment, since the middle layer 12 is colored with a different color from the outer layer 13, in the use of the multilayer fiber rope 1, when the middle layer 12 is exposed due to damage of the outer layer 13, This is also useful in that it can be recognized immediately and can be used to determine the degree of damage. Here, the example in which the material fibers of the middle layer 12 are colored has been described as an example, but the outer layer 13 may be colored to have a different color from the middle layer 12 (the same concept). Is). In addition, the inner layer 11 may be colored.

  In the present embodiment, the middle layer 12 and the outer layer 13 have been described as an example using a heat-sealed yarn in which two polyesters having different melting points are mixed and twisted. However, the present invention is not limited to this, and only the middle layer 12 is used. May be used for the inner layer rope 11, the middle layer 12, or the inner layer rope 11, the middle layer 12, and the outer layer 13. In these, the mixing ratio of the low melting point material fibers may be changed for each layer.

(Embodiment 2)
The multilayer fiber rope according to the second embodiment has the same structure as that of the first embodiment, and includes an inner layer rope, an intermediate layer, and an outer layer. In addition, the description here about the concept similar to Embodiment 1 is abbreviate | omitted or simplified, and here, a different part from Embodiment 1 is mainly demonstrated.

In this embodiment, the middle layer is formed of a plurality of fiber materials having different melting points. For example, those having melting points of 110 ° C., 160 ° C., 210 ° C., and 260 ° C. are made of heat-welded yarns mixed at an equal ratio. In the present embodiment, in the multilayer fiber rope having such a configuration, the bending hardness of the multilayer fiber rope 1 is changed by changing the heating temperature in the heat treatment step. That is, since the four melting point materials are mixed at an equal ratio, for example, when heat-treated at 130 ° C., it is synonymous with binder polyester: regular polyester = 25: 75, and when heated at 180 ° C., the binder Polyester: Regular polyester = 50: 50 When heated at 230 ° C., binder polyester: regular polyester = 75: 25.
In addition, as mentioned above, when the mixing ratio of the material having a low melting point (binder polyester) is less than 10%, the adhesive ability is reduced (that is, the ratio of the heat-welded material is preferably 10% or more). The mixing ratio of the low fiber material is preferably 10% or more.

  As described above, according to the multi-layer fiber rope and the manufacturing method thereof of the present embodiment, the multi-layer fiber rope to be prepared (the rope before the heat treatment) itself may be one type, and the user only has to change the heating temperature. It is possible to provide a rope having a desired bending hardness, which is very useful.

  Here, the example in which four types of melting point materials are made to have an equal mixing ratio has been described as an example, but the present invention is not limited to this, and the number of types and the respective mixing ratios are appropriately selected and applied. be able to. Further, as described in Embodiment 2, the inner layer rope and the outer layer may be formed of a plurality of fiber materials having different melting points.

1. . . 10. Multi-layer fiber rope, . . Inner layer rope (inner layer), 12. . . The middle layer, 13. . . Outer layer

Claims (7)

In a fiber rope with an inner layer and an outer layer,
Middle is provided between the inner and outer layers, said middle layer and outer layer are formed by two or more materials having different melting points,
By changing the mixing ratio of the materials having a melting point lower than the heating temperature in the heat treatment step, the ratio of the material that is dissolved in the heat treatment step and welds the inner layer and the outer layer is changed. A multilayer fiber rope characterized by that. The multilayer fiber rope according to claim 1, wherein a mixing ratio of materials having a melting point lower than the heat treatment temperature is 10% or more. The multilayer fiber rope according to claim 1 or 2 , wherein the intermediate layer is formed of a material having a different color from that of the outer layer, or is colored in a different color. An inner layer, an outer layer, and a middle layer provided between the inner layer and the outer layer, wherein the middle layer and the outer layer are made of two or more materials having different melting points, ,
A step of fusing the inner layer and the outer layer by heat treatment at a temperature higher than at least one melting point and lower than at least one melting point among the different melting points;
A method for producing a multi-layer fiber rope, wherein the bending hardness of the rope is changed by changing the mixing ratio of the material having a melting point lower than the heating temperature in the heat treatment step in the intermediate layer and the outer layer. The method for producing a multi-layer fiber rope according to claim 4, wherein a mixing ratio of materials having a melting point lower than the heating temperature is 10% or more. The method for producing a multilayer fiber rope according to claim 4 or 5 , wherein the intermediate layer is formed of a material having a color different from that of the outer layer, or is colored in a different color. An inner layer, an outer layer, and an intermediate layer provided between the inner layer and the outer layer, wherein the intermediate layer is formed of a plurality of materials having different melting points,
A step of fusing the inner layer and the outer layer by heat treatment at a temperature higher than at least one melting point and lower than at least one melting point among the different melting points;
A method for producing a multilayer fiber rope, wherein the bending hardness of the rope is changed by changing the heating temperature in the heat treatment step across the melting points of the plurality of materials.

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