JPH08291482A - Identification rope - Google Patents

Abstract

PURPOSE: To obtain an identification rope enabling its service life and type to be visibly recognizable even after used for a long period, by laying side strands around a fibrous chore having at least partially colored portions on part of the outside thereof. CONSTITUTION: First, using synthetic fibers such as polypropylene fibers or semisynthetic fibers such as cellulose acetate fibers, those colored with a colorant such as a dye or pigment and those noncolored are mutually laid to form a fibrous chore 7 having at least partially colored portions 7a on part of the outer periphery thereof. Subsequently, side strands 8 each made by bundling plural bare steel wires followed by entwining are laid around the fibrous core 7 to obtain the objective identification rope 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an identification rope capable of identifying the type of rope.

[0002]

2. Description of the Related Art In a cargo handling machine represented by a crane, for example, a wire rope occupies an important position as an element for hoisting and lowering cargo. A wire rope for a cargo handling machine is required to have little wear due to repeated bending, so that it is not easily broken and that it is not easily corroded.

The wire rope for a cargo handling machine gradually deteriorates due to internal breakage and internal corrosion, which cannot be found by visual inspection, during repeated use. From the viewpoint of health and safety, it is necessary to properly grasp the secular change of such ropes and manage the start time of use for each rope individually.

Further, if the wire ropes have the same diameter and the same external structure, even different ropes made of different materials and having different breaking strengths will look the same and cannot be identified only by their appearance. Therefore, it is necessary to control the breaking strength and internal structure of each rope so that they can be visually identified. Conventionally, there are ropes in which strands are painted and colored, ropes in which side strands are painted and colored, or ropes in which printing thread or the like is twisted around a cord or rope core.

[0005]

However, the wire-colored rope and the strand-colored rope are significantly worn when they rub against a crane sheave or another rope, and the colored paint peels off, so that the rope cannot be identified in a short period of time. Will end up. For this reason, it is necessary to inspect the rope at short intervals and to paint the rope frequently. In addition, these have high manufacturing costs and maintenance costs.

Further, in a conventional rope in which a printing thread or the like is twisted into a core rope or rope core, the core portion rubs against the surrounding side strands, and the surface is damaged to make it indistinguishable. Further, if it is continuously used outdoors for a long period of time exposed to a large amount of ultraviolet rays, the heart may be discolored and it may be difficult to identify.

The present invention has been made to solve the above problems, and it is an object of the present invention to provide an identification rope whose life and type can be easily identified with the naked eye even if it is used for a long period of time. To aim.

[0008]

An identification rope according to the present invention comprises a fiber core and side strands twisted around the fiber core, and at least a part of an outer peripheral portion of the fiber core is colored. It is characterized by

In this case, the fiber core is formed by twisting synthetic fibers such as polypropylene and semi-synthetic fibers such as acetate, and these synthetic fibers or semi-synthetic fibers are colored with a dye-based or pigment-based coloring agent. Is preferred.

As the dye-based coloring agent, azo-based, anthraquinone-based, thioindigo-based, quinoline-based, and indanthrene-based coloring agents can be used. Dye-based colorants are inferior in heat resistance, weather resistance, and solvent resistance to pigment-based colorants,
It is excellent in terms of tinting strength, dispersibility, and sharpness, and can be distinguished from a distant place at the beginning of use.

As the pigment-based colorant, a phthalocyanine-based colorant,
Quinacridone-based and benzidine-based coloring agents can be used. Pigment-based colorants are inferior in color strength, dispersibility, and sharpness to dye-based dyes, but they are superior in heat resistance, weather resistance, and solvent resistance, and do not easily decolorize or fade, so initial use It is identifiable for a long period from the end to the end.

[0012]

In the identification rope according to the present invention, the outer peripheral portion of the fiber core is colored with the dye-based coloring agent, so that it cannot be easily peeled off from the substrate like paint, and it is used for a long time under ultraviolet irradiation. Even if it is done, it does not easily fade. Therefore, by partially removing the cut end portion or the side strand of the identification rope and exposing the fiber core, it is possible to surely identify the rope from other ropes.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, an example of a wire rope with a fiber core used in a cargo handling machine such as a crane will be described. (Embodiment 1) 6 × W (19) 16 having a sectional structure shown in FIG.
mm was prepared as an identification rope. A fiber core 3 is placed in the core of the identification rope 2 of the first embodiment, and six side strands 4 are twisted by Z twist around the outer periphery of the fiber core 3.

The fiber core 3 is made of polypropylene fiber colored with a dye colorant such as an azo type, anthraquinone type, thioindigo type, quinoline type or indanthrene type.
The side strand 4 is composed of one core wire, six inner circumference wires, six outer circumference thick wires, and six outer circumference thin wires W [1 + 6 + (6+
6)]. These 19 large and small diameter bare steel wires are
The side strands 4 are formed by twisting. For steel wire,
For example, a wire having a C content of 0.60 to 0.86% by weight and a Mn content of 0.60% by weight or less was heat-treated and drawn, respectively. When the outer diameter of the rope was 16 mm, the rope pitch was about 100 mm, and the twist pitch of the side strands 4 was about 42 mm.

As shown in FIG. 1, by partially removing the side strand 4 at the end of the rope, the fiber core 3 is exposed, and the type of rope and the date of manufacture can be visually identified. (Embodiment 2) 6 × Fi (25) 2 having the sectional structure shown in FIG.
0 mm was made as an identification rope. A fiber core 7 is inserted in the core of the identification rope 6 of the second embodiment.
The six side strands 8 are twisted by Z twist around the outer periphery of the.

The fiber core 7 is obtained by twisting together polypropylene fibers colored with a pigment-based coloring agent such as phthalocyanine type, quinacridone type, and benzidine type and uncolored polypropylene fibers. The side strand 8 has a configuration of Fi [1 + 6 + (6) +12] including one core wire, six inner peripheral wires, six filler wires, and twelve outer peripheral wires. The side strands 8 are formed by twisting these 25 large and small diameter bare steel wires 23 into S strands. The steel wire has, for example, a C content of 0.60 to 0.86% by weight and a Mn content of 0.60.
Wires of which weight% or less were heat-treated and drawn were used.

As shown in FIG. 3, if the side strands 8 at the end of the rope are partially removed, the fiber core 7 is exposed and the partially colored portion 7a can be visually identified. You can determine the day. In addition, since the pigment-based colorant has a certain degree of resistance to ultraviolet irradiation, the degree of fading is small and the pigment can be identified for a long period of time.

Next, a method of manufacturing the identification rope of the above embodiment will be described. [Formation of Fiber Core] A large-diameter or medium-diameter polypropylene fiber is degreased and washed, dried, and then immersed in a dye solution in a tank for a predetermined time. Azo type, anthraquinone type,
A dye solution such as thioindigo type, quinoline type or indanthrene type is contained. The fiber is pulled out of the dye solution, immediately washed with water and dried. In order to stabilize the colorant, it is desirable to carry out the treatment after coloring in the shortest possible time. It is desirable to carry out the dyeing treatment in the temperature range from room temperature to 60 ° C.

A large number of the thus-colored fibers were twisted in Z to obtain a fiber core 3. When manufacturing the fiber core 7 having the partially colored portion 7a, the uncolored fibers were mixed with the colored fibers at a ratio of 7 to 9 and twisted. [Formation of Side Strands] After subjecting the wire rod to patenting, the area reduction rate is 80 to 9 by drawing a die 5 to 12 times.
A predetermined wire is obtained by performing 5% cold drawing.

Nineteen bare steel wires were sent to a twisting machine and twisted together into S twists to obtain side strands 4 of W [1 + 6 + (6 + 6)] constitution. [Rope twisting] The twisting machine is installed between the reel stand of the rope core and the winder of the winding section, and tension control is applied so that a predetermined tension is applied to each side strand that is continuously fed. Has been done. The rope core is passed through the center of the twisting machine, the side strands 4 are shaped (preformed) by a preforming device, and these are twisted on the fiber core by voice. The twist direction is Z twist. After leaving the voice, it becomes 6 × W (19).

[0021]

According to the present invention, since the outer peripheral portion of the fiber core is colored with a dye-based or pigment-based coloring agent, it does not easily peel off from the ground like a paint, and it is exposed to ultraviolet rays for a long period of time. Even if used over time, it does not easily fade. Therefore, by partially removing the cut end portion or the side strand of the identification rope and exposing the fiber core, it is possible to surely identify the rope from other ropes.

In particular, even at a place where it is rubbed against a crane sheave or other ropes and is significantly worn, the life and type can be easily identified from the appearance over a long period of time. Therefore, it is not necessary to inspect the rope in a short cycle or to paint the rope frequently, and the maintenance and inspection cost is greatly reduced.

[Brief description of drawings]

FIG. 1 is an external view showing an identification rope according to a first embodiment of the present invention.

FIG. 2 is a transverse sectional view showing a part of the identification rope of the first embodiment.

FIG. 3 is an external view showing an identification rope according to a second embodiment of the present invention.

FIG. 4 is a transverse cross-sectional view showing a part of the identification rope of the second embodiment.

[Explanation of symbols]

 2, 6 ... Identification rope 3, 7 ... Fiber core 4, 8 ... Side strand

Claims (2)

[Claims] 1. An identification rope comprising a fiber core and side strands twisted around the fiber core, wherein at least a part of an outer peripheral portion of the fiber core is colored. 2. The identification rope according to claim 1, wherein the fiber core is formed by twisting synthetic fibers or semi-synthetic fibers, and these fibers are colored with a dye-based or pigment-based coloring agent. .