JPH10140490A - Wire rope having fiber core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a wire rope having a fiber core, a light weight and a moderate flexibility, improving a cord strength and an endurance by making a fiber bundle obtained by bundling multiple numbers of high strength fiber yarns as a core, and bundling and covering the fiber-bundled core with a braided coating layer or a bundling member. SOLUTION: The wire ropes each having a fiber core 10a, 10b, 10c are equipped with a fiber-bundled core 1 produced by bundling multiple numbers of high strength fiber yarns 1a and impregnating with a lubricant, a braided coating layer 3 coating the fiber-bundled core 1 by braiding fibrous yarns 3a, 3b, and 6 or 12 wire strands 4a, 4b or 4c twisted around the braided coating layer 3. Also, the fiber-bundled core 1 is bundled and coated by a bundling members 2 (2a, 2b, 2c) capable of penetrating the lubricant for mediating the bundling member 2 between the fiber-bundled core 1 and the braided coating layer 3 in the wire ropes having the fiber cores 10a, 10b, 10c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rope with a fiber core, which is suitable for an elevator, a lift, etc., which are repeatedly bent and deformed.

[0002]

2. Description of the Related Art Conventionally, in an elevator or a lift, a fiber core impregnated with a lubricant by twisting a plurality of (three in the illustrated example) fiber strands formed of hemp or the like as shown in FIG. a (a + 9 + 9) twisted wire strands b and six (or eight, not shown) twisted into
A lightweight and flexible wire rope R with a fiber core having a lightweight and flexible structure configured in a × S (19) structure or an 8 × S (19) structure is widely used. Further, when the wire rope with the fiber core is repeatedly bent and deformed by using it for an elevator or a lift, etc., the fiber core is rubbed by the wire strand of the wire strand and the life is shortened. It is formed of natural fiber or synthetic resin fiber which is relatively hard to be worn and has low strength and large elongation.

[0003]

Since the conventional wire rope with a fiber core has a structure in which a plurality of wire strands are twisted around the fiber core as described above, the fiber rope is formed by the strands of the wire strand. The core is easily rubbed locally, which contributes to a shortened life. In addition, since the fiber core is formed of a low-strength, large-strength fiber that is relatively hard to be rubbed as described above, the fiber core has a larger elongation than the wire strand and hardly contributes to the rope strength. There are problems with rope strength, durability, etc., such as the shape being easily deformed.

SUMMARY OF THE INVENTION The present invention has been developed to solve the above-mentioned problems, and an object thereof is to provide a high-strength and high-elasticity fiber bundle obtained by bundling a number of high-strength fiber yarns. An object of the present invention is to provide a wire rope with a fiber core having an improved cord strength and durability by, for example, concentrating and covering a fiber bundle core with a braided coating layer or a bundle member as a core.

[0005]

SUMMARY OF THE INVENTION The present invention provides a fiber bundle core in which a number of high strength fiber yarns are bundled and impregnated with a lubricant, a braided coating layer in which the fiber yarns are braided to cover the fiber bundle core, and The present invention is characterized by a fiber core-containing wire rope having six to twelve wire strands twisted around the braided coating layer. The fiber bundle core is bundled and covered, and a bundle member is interposed between the fiber bundle core and the braided coating layer. In addition to increasing the breaking force, the braided coating layer or the sizing member, which bundles and covers the fiber bundle core, effectively prevents the fiber bundle core from being abraded and increases the wire strand support force, that is, the rope shape retention performance, etc. And overall lighter And effectively enhance the durability with rope strength and the like to ensure the flexibility of the degree.

[0006]

FIG. 1A shows a first embodiment of the present invention, FIG. 1B shows a second embodiment, FIG. 1C shows a third embodiment, and FIGS.
B and C show specific examples of the focusing member. In the figure, reference numeral 1 denotes a fiber bundle core obtained by bundling a large number of high-strength fiber yarns 1a, 2 denotes a bundling member made of 2a, 2b, 2c or the like obtained by bundling and coating the fiber bundle core; 3 denotes a plurality of fiber yarns 3a; , 4b, 4b, 4b, 4b, 4b, 4b, 4b
c is the wire strand of each embodiment, 10a, 10b, 1
0c is a wire rope with a fiber core of each embodiment.

The present invention shown in the drawing is a fiber bundle core 1 in which a large number of high-strength fiber yarns 1a are bundled and impregnated with a lubricant, and a braid coating in which the fiber yarns 3a and 3b are braided to cover the fiber bundle core 1. A wire rope 10 with a fiber core, comprising a layer 3 and 6 to 12 wire strands 4a, 4b, 4c twisted around the braided coating layer 3.
a, 10b and 10c.

In the above-mentioned wire rope with a fiber core, the convergence member 2 (2a, 2b, 2
The fiber bundle core 1 is bundled and covered according to c), and the bundle member 2
Interposed between the fiber bundle core 1 and the braided coating layer 3.
c.

More specifically, the fiber bundle core 1 is made by spinning fibers of high-strength aramid resin, PBO resin, carbon fiber, or the like and appropriately twisting the fibers, or by twisting a plurality of the fibers to form a relatively strong fiber. It is formed by a high-strength fiber yarn 1a having a small diameter. A large number (for example, several hundreds) of the high-strength fiber yarns 1a are bundled in parallel to have an appropriate core diameter corresponding to the rope diameter of the fiber core-containing wire ropes 10a, 10b, and 10c, and a suitable impregnation with a lubricant. It has a structured structure. The fiber bundle core 1 is bundled by a fiber wrapping (not shown) or covered with a braided coating layer 3 as needed, and is bundled, and preferably, as shown in FIG. 2 (2a, 2b, 2c), the bundle 2 is interposed and covered between the fiber bundle core 1 and the braided coating layer 3. 1A, 1B, and 1C, the high-strength fiber yarns 1a of the fiber bundle core 1 are shown at intervals, but in practice, they are tightly bundled by the braided coating layer 3 or the bundling member 2, and the wire strands 4a, 4b and 4c are densely packed.

Further, the tensile modulus of elasticity of various fibers (kgf
/ Mm ² ), elongation at break (index%) and tensile strength (kgf
/ Mm ² ), natural fibers such as hemp, for example, have a tensile modulus of elasticity of 30 to 50, elongation at break of 3, and tensile strength of 50.
5, while the tensile strength is 120, the fiber applied to the fiber bundle core 1 of the present invention is an aramid-based fiber and has a tensile elasticity coefficient of 7
400, elongation at break 4.5, tensile strength 350 PBO fiber has a tensile modulus of elasticity of 28000 and elongation at break of 3.
0, tensile strength 550 The carbon fiber has a tensile modulus of elasticity of 24000, a breaking elongation of 0.6, and a tensile strength of 420. That is, the tensile elasticity coefficient is about 6,000 to 30,000 kgf / mm ² , the breaking elongation is 0.5 to 6.0%, and the breaking strength is 300 to 550 kgf / mm ^2.
shall apply in mm ² approximately, both at a significantly higher strength than the wire strand, small elongation without extending the material only by twisting, i.e. the like becomes wire strands the same degree or more elastic, the fibers Tabashin 1 has a structure that effectively contributes to an increase in the rope strength.

The focusing member 2 (2a, 2b, 2c)
Is preferably made of a relatively stretchable synthetic resin such as polyester, etc., and a tubular mesh 2a is fitted on the fiber bundle core 1 as shown in FIG. 2A, or a fiber is formed as shown in FIG. 2B. By winding a tape 2b provided with a large number of holes around the bundle core 1, or by winding a tape 2c around the fiber bundle core 1 at an interval α as shown in FIG. 2C,
The fiber bundle core 1 is bundled and covered, and a structure is provided between the fiber bundle core 1 and the braided coating layer 3. In any case, while keeping the rigidity of the fiber bundle core 1 so hard that the rope flexibility is not particularly impaired, the lubricant impregnated in the fiber bundle core 1 is appropriately transmitted to maintain the lubricating performance for a long time.

As shown in FIG. 2, the braided coating layer 3 is preferably made of a fiber of polyester or nylon having a suitable elongation or preferably an epoxy resin excellent in resin impregnating property. Book fiber yarns 3a and 3
b, and directly or around the bundle member 2 around the fiber bundle core 1.
It also has a focusing function by indirectly arranging and covering via (2a, 2b, 2c). The illustrated example is a braided coating layer 3 braided in a cylindrical shape.
Is fitted, but it is also possible to adopt a structure in which a braided band-shaped material is wound as required. The braided coating layer 3 is composed of a plurality of fiber yarns 3a and 3b having different weaving directions, and the wire strands 4a and 4b
Or, it is easy to move following the displacement of 4c, the relative slip is reduced, the abrasion is effectively prevented, the abrasion by the wire strand is small, and the abrasion with the bundle member 2 and the fiber bundle core 1 is also reduced. Few. In addition, the fiber bundle core 1 can be arranged in a plurality of layers as needed to have an appropriate thickness, and damage to the fiber bundle core 1 can be prevented for a longer period of time. Even if the focusing member 2 and the braided coating layer 3 are applied, the weight and flexibility of the rope are not particularly affected, and the wire rope is formed into a lightweight and moderately flexible wire rope as in the conventional example.

As shown in FIG. 1A, the wire strands 4a, 4b and 4c are formed by twisting six strands into one strand and further twisting six large and small diameter strands.
(1 + 6 + [6 + 6]) strand 4a having a twisted structure,
As shown in FIG. 1B, nine small-diameter strands are twisted with one large-diameter strand, and nine large-diameter strands are further twisted.
Strand 4b of (1 + 9 + 9) twist structure, or FIG.
As shown in FIG.
, And furthermore, 12 strands were twisted in the upper layer (1 + 6 +
(6) +12) Apply the strand 4c of the twist structure, etc.,
Six, eight or twelve of these strands are twisted around the braided coating layer 3 to form a 6 × W (19) structure, 8 × S
(19) The wire ropes 10a, 10b, and 10c each having a fiber core having a structure or a 12 × Fi (25) structure.

As shown in FIG. 1A, a first embodiment shown in FIG. 1A includes a fiber bundle core 1 in which a number of high strength fiber yarns 1a are bundled and impregnated with a lubricant, and a fiber bundle member 2 which is permeable to a lubricant.
(2a, 2b, 2c) is wound around the fiber bundle core 1 as needed, bundled and covered, and the braided coating layer 3 in which the fiber yarns 3a, 3b are braided is directly covered on the fiber bundle core 1 or a fiber bundle member. 2 and the braided coating layer 3 is coated with W (1+
A 6 × W (19) structure (Wallington type) fiber cored wire rope 10a is obtained by twisting six wire strands 4a having a 6+ [6 + 6]) twist structure.

A wire rope 10 with a fiber core of the first embodiment
In a, the fiber bundle core 1 bundles a large number of high-strength fiber yarns 1a without twisting them, so that the fiber bundle core 1 effectively contributes to the rope strength with excellent high strength and high elasticity and small elongation. It is bundled and covered with the braided coating layer 3 or the fiber bundle member 2 to effectively prevent abrasion by the wire strand 4a. The core diameter of the fiber bundle core 1 is easily adjusted in accordance with the rope diameter by increasing or decreasing the diameter or the number of the high-strength fiber yarns 1a, and the fiber bundle core 1 is formed to have a uniform core diameter over the entire length. The wire strands 4a of the outer layer are filled through the braided coating layer 3 and the fiber bunching member 2 into the group of outer strands 4a, thereby effectively increasing the strength and durability of the ropes, such as increasing the support force of the wire strands 4a, that is, the rope shape retention force. I have. The braid coating layer 3 covers the fiber bundle core 1 directly or via the fiber bundle member 2 to cover the fiber bundle core 1. This braid mechanism has a moderate flexibility and the wire element of the wire strand 4a. It is easy to move following the line, so that the abrasion is reduced, and the abrasion of the fiber bundle core 1 is effectively prevented. The fiber bundle member 2 moderately strongly bundles the fiber bundle core 1, and the fiber bundle core 1 is further prevented from abrasion due to the bundle and coating by this interposition, and the rope shape retaining force by the fiber bundle core 1 is further increased. ing. The fiber bundle member 2 and the braided coating layer 3 allow the lubricant impregnated in the fiber bundle core 1 to permeate properly for a long period of time and have excellent lubricity and significantly increase the rope life. Furthermore, even if the braided coating layer 3 and the fiber bunching member 2 are applied, the weight and flexibility of the rope are not significantly impaired, and the weight and flexibility are secured almost in the same manner as in the conventional example. The sex etc. are effectively enhanced.

In the second embodiment shown in FIG. 1B, a fiber bundle core 1 in which a large number of high-strength fiber yarns 1a are bundled and impregnated with a lubricant, and a fiber bundle member 2 (2a, 2b, 2) which transmits the lubricant.
c) is wound around the fiber bundle core 1 as needed, bundled and covered, and the braided coating layer 3 in which a plurality of the fiber yarns 3a and 3b are braided is directly interposed on the fiber bundle core 1 or the fiber bundle member 2 is interposed. 8 × S (1) in which eight wire strands 4b having an S (1 + 9 + 9) twist structure are twisted on the braided coating layer 3
9) Wire rope 10b with fiber core of structure (seal type)
The first embodiment (see FIG. 1A) is characterized by a different structure and a different number of wire strands 4b from the first embodiment, and the other structures are basically the same. Functions and effects similar to those of the first embodiment are exhibited.

In the third embodiment shown in FIG. 1C, a fiber bundle core 1 in which a number of high-strength fiber yarns 1a are bundled and impregnated with a lubricant, and a fiber bundle member 2 (2a, 2b, 2) permeable to the lubricant.
c) is wound around the fiber bundle core 1 as needed, bundled and covered, and the braided coating layer 3 in which a plurality of the fiber yarns 3a and 3b are braided is directly interposed on the fiber bundle core 1 or the fiber bundle member 2 is interposed. And 12 × Fi (1 + 6 +
(6) +12) A wire rope 10c with a fiber core having a 12 × Fi (25) structure (filler type) in which eight wire strands 4c having a twist structure are twisted together is used in the first embodiment (see FIG. 1A). Compared to the first embodiment, the wire strand 4c has a different structure and a different number of wire strands, and the other structures are basically the same.

The samples shown in Tables 1 and 2 were prepared by twisting six or eight wire strands on a fiber core formed by twisting three fiber strands formed of a low-strength polypropylene synthetic fiber, and having a rope diameter of 12. A large number of wire ropes with a fiber core formed to 4 mm were manufactured, and Comparative Example 1 having a 6 × W (19) structure and Comparative Example 2 having an 8 × S (19) structure were prepared. Example of a 6 × W (19) structure in which a large number of fiber core-containing wire ropes each having a fiber bundle core in which fiber yarns are bundled, a braided coating layer, and various wire strands and having a rope diameter of 12.4 mm were manufactured. Example 2 of 1 (see FIG. 1A), 8 × S (19) structure
Example 3 (see FIG. 1B) and 12 × Fi (25) structure
(See FIG. 1C), and a load of 1,300 kg was applied to these samples.
And subjected to a fatigue test of repeated bending and deformation, and the results as shown were obtained. In the table, the rope diameter and the diameter of the fiber bundle core are shown in units of mm, and the residual strength is an index% indicating the breaking strength when a wire breakage of 10% occurs in a fatigue test.

As apparent from Tables 1 and 2, the fiber cores of both comparative examples, which are formed of fiber yarns of relatively low strength and large elongation and whose elongation is further increased by twisting, have high strength. The fiber bundle core of each embodiment having a structure in which fiber yarns of small elongation are bundled has a significantly higher tensile modulus of elasticity, i.e., tensile strength, and significantly reduced core elongation, resulting in a significant increase in rope breaking force, i.e., rope strength. Have been.
In addition, it was confirmed that the above-mentioned effects and effects were obtained, such as the fatigue property, that is, the service life was effectively increased by the braided coating layer. In addition, in each embodiment other than the display,
As a result of producing a large number of wire ropes with fiber cores obtained by twisting wire strands having different structures and performing the above-described tests, similar evaluations could be obtained.

[0020]

[Table 1]

[0021]

[Table 2] In the table, the rope diameter and the fiber core diameter are shown in mm, the core tensile elastic modulus is kgf / mm ² , and the index is%.

Each embodiment is not limited to the wire strand having the structure shown in the drawing, but may be a wire rope with a fiber core to which wire strands having various different structures are applied. As the fiber bundle core, other similar high-strength fibers can be used.

[0023]

According to the present invention, since the fiber bundle core having the above-mentioned structure is bundled without twisting a large number of high-strength fiber yarns, the rope has excellent high strength and small elongation. Contributing to the increase in strength, the braided coating layer or the fiber bundling member bundles and coats the fiber bundle core, effectively preventing the fiber bundle core from being abraded by a braid mechanism, etc., and also forms a rope together with the fiber bundle core. The rope strength and durability have been effectively increased by increasing the power. In addition, even if a braided coating layer or a fiber bundle member is applied, the weight and flexibility of the rope are not significantly impaired, and the weight and flexibility are secured almost in the same manner as the conventional example. And the cord strength and durability are effectively improved.

[Brief description of the drawings]

FIG. 1A is a cross sectional view showing a first embodiment of the present invention, FIG. 1B is a cross sectional view showing a second embodiment, and FIG. 1C is a cross sectional view showing a third embodiment.

FIG. 2 is a side view (A), (B), and (C) showing each specific example of the focusing member, partially cut away;

FIG. 3 is a cross-sectional view showing a conventional wire rope with a fiber core.

[Explanation of symbols]

 1 (1a) Fiber bundle core 2 (2a, 2b, 2c) Focusing member 3 (3a, 3b) Woven coating layer 4a, 4b, 4c Wire strand 10a, 10b, 10c Wire rope with fiber core

Claims (2)

[Claims] 1. A fiber bundle core in which a number of high-strength fiber yarns are bundled and impregnated with a lubricant, a braided coating layer in which the fiber yarns are braided to cover the fiber bundle core, and a twist is formed around the braided coating layer. A fiber rope with a fiber core, comprising a total of 6 to 12 wire strands. 2. The fiber core-containing wire rope according to claim 1, wherein the fiber bundle core is bundled and covered by a lubricant-permeable bundle member, and the bundle member is disposed between the fiber bundle core and the braided coating layer. A wire rope with a fiber core, which is interposed in the wire rope.