JP2554843B2 - Trunk line for longline - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a longline trunk used for fishing large fish such as tuna.

[0002]

2. Description of the Related Art As a longline trunk line which has been conventionally used for fishing a large fish such as a tuna, a synthetic fiber, for example, a bundle of a large number of nylon yarns or polyester yarns is twisted into three strands. It is known that

[0003] However, the trunk rope for long line made by triple twist has a peculiar peculiarity to the twisted yarn, that is, yarn peculiarity, becomes too hard, and kinks easily enter during the work, and the trunk is entangled. Therefore, there was a problem that the operation of the long line could not be performed smoothly because the long line was not put in and rolled up smoothly. In addition, as mentioned above, when making a longline trunk by twisting three strands using nylon or polyester threads, it must be made quite thick in order to have strength, and it becomes bulky when loaded on a ship, There was a problem that it could not be loaded.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve such a problem, and eliminates yarn peculiarities, improves operability, and has high strength even when the thickness is thin, and is loaded on a ship. It is an object of the present invention to provide a trunk line for a long line, which can sometimes reduce the bulkiness.

[0005]

In order to solve this problem, the present invention comprises a core fiber made of synthetic fiber having a tensile strength of 20 g / d or more and a breaking elongation of 4 to 8%. The gist of the present invention is that the core yarn is wrapped around with a covering yarn made of synthetic fiber or natural fiber, and a plurality of yarns covered with the covering yarn are used for braiding.

The present invention will be described in detail below. Synthetic fibers constituting the core yarn and having a tensile strength of 20 g / d or more and an elongation at break of 4 to 8% are the low fibers obtained by liquid crystal spinning or gel spinning. Elongation, high-strength synthetic fibers, such as Kevlar (registered trademark, manufactured by DuPont) yarn made of aramid resin, Vectran (registered trademark, made by Kuraray Co., Ltd.) yarn made of polyarylate resin, polyethylene-based There are TECMILON (registered trademark, manufactured by Mitsui Petrochemical Co., Ltd.) yarn and Dyneema (registered trademark, manufactured by Toyobo Co., Ltd.) yarn made of resin. Particularly preferred are Techmilon (registered trademark, manufactured by Mitsui Petrochemical Industry Co., Ltd.) yarn and Dyneema (registered trademark, manufactured by Toyobo Co., Ltd.) yarns having a low specific gravity.
Further, these yarns forming the core yarn may be monofilaments or multifilaments.

The fibers constituting the covering yarn which wraps the core yarn may be multifilaments or monofilaments made of synthetic fibers such as nylon or polyester, or fine cotton yarn or hemp yarn, but is preferably a single thick yarn. It is better to use mono-multi yarn which is a collective yarn.

[0008] A trunk line for long lines can be manufactured by braiding a plurality of yarns covered with the above-mentioned covered yarns. When making a trunk line for tuna long lines, 8 or 12 threads are made. This is preferable. In addition, it is preferable that the trunk line for longline is installed in a state of floating as close to the sea surface as possible. For that purpose, the material is selected and the specific gravity is 1.
It must be 04 or less. As a result, there is no subsidence of the trunk line, and it becomes easier to settle near the sea surface. Further, it is possible to apply water-repellent treatment to the braided trunk rope, which can suppress the water content of the trunk rope.

By the way, the reason why the tensile strength of the synthetic fiber constituting the core yarn is set to 20 g / d or more and the breaking elongation is set to 4 to 8% is as follows. When the tensile strength is less than 20 g / d, the longline fishing method is used. If the breaking elongation is less than 4%, there is a problem that shock breakage occurs, and the breaking elongation is 8%.
This is because if it exceeds%, there is a problem in that workability is poor due to elongation during winding.

FIG. 1 is a sectional view showing a trunk rope obtained by the present invention. Reference numeral 1 is a core yarn, 2 is a covering yarn for covering the core yarn 1, and the core yarn 1 is composed of a plurality of yarns. They are bundled together and covered with the covering yarn 2. Then, by using twelve yarns 3 formed by coating the core yarn 1 with the covering yarn 2, a trunk rope for long line is produced.

[0011]

Embodiments of the present invention will be described below. Example 1 Tecmiron (registered trademark, manufactured by Mitsui Petrochemical Co., Ltd.) yarn having a tensile strength of 25 g / d and a breaking elongation of 5%, 1000 denier / 100 f × 4 yarns (total 4000 denier) was used as a core yarn, and the periphery thereof was used. Polyethylene terephthalate (PE
T) Twelve yarns covered with 2600 denier of crimped yarn were used to make a cord, and a trunk line for long lines was produced.

Comparative Example 1 1500 denier / 144 f × 9 polyester yarns having a tensile strength of 9.5 g / d and a breaking elongation of 18% (total 135)
(00 denier) is used as the core yarn, and the periphery is covered with polyethylene terephthalate (PET) crimped yarn 19500 denier. Using three yarns, three ropes are twisted with a rope twisting machine to make a longline trunk. did.

Table 1 shows comparative data of trunk ropes for longlines produced according to Example 1 and Comparative Example 1.

[0014]

[Table 1]

In the table, wear resistance, flexibility,
The water absorption rate was evaluated by the following test method. Abrasion resistance (edge method) As shown in FIG. 2, one end of the trunk rope 4 for testing is 30 rpm.
It is attached to a device 5 having a stroke of 2, a load 6 of 2 kg is applied to the other end of the trunk 4, and the portion for evaluating the wearability of the trunk 4 is a support rod 8 wound with emery paper CC-800CW No. 7. After being subjected to an abrasion test for 10 minutes so as to be in contact with each other at a right angle, the strength was measured by an autograph tester manufactured by Shimadzu Corporation, and the retention rate to the blank was evaluated. Flexibility As shown in FIG. 3, one end of the test piece 9 is fixed, and a force is applied to the other end from above, so that the other end of the test piece 9 moves at an interval of 3
The stress (g) when it reached cm was measured by an autograph tester manufactured by Shimadzu Corporation and evaluated by the numerical value. Water absorption rate A test piece cut into a certain length was dried (A), soaked in water for 10 minutes, and then taken out to give 10
After draining water for a minute, the weight (B) of the test piece was measured, calculated by the following formula, and evaluated by the value.

[0016]

[Equation 1]

From Table 1 as well, it can be seen that the trunk line for longline made in Example 1 is superior to the trunk line for longline made in Comparative Example 1 in each characteristic.

[0018]

As described above, since the trunk rope for a long line of the present invention is braided, it does not have the yarn peculiarity that the conventional trunk rope for a long line made by the conventional triple twist and has flexibility. Yes, operability can be improved. In addition, since a low elongation, high strength yarn is used as the core yarn, it is possible to form a thin and strong trunk rope as compared with a conventional trunk rope produced by twisting three nylon threads or polyester threads, The bulkiness when loaded on a ship can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a trunk rope according to the present invention.

FIG. 2 is an explanatory diagram showing a wear resistance evaluation method.

FIG. 3 is an explanatory diagram showing a flexibility evaluation method.

[Explanation of symbols]

 1 core yarn 2 coated yarn 3 yarn

Claims (1)

(57) [Claims] 1. A tensile strength of 20 g / d or more and a breaking elongation of 4
A core yarn is made of synthetic fibers in the range of up to 8%, and the core yarn is wrapped with a covering yarn made of synthetic fibers or natural fibers, and a plurality of yarns covered with the covering yarn are used for braiding. A trunk line for long lines, which is characterized by being formed.