JP2009095276A - Nipping net for farming - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nipping net for farming, which is proposed by considering the conventional problem, has no contraction, regardless of repeated use for farming, is stably usable for a long period of time and which has proper recovery for contraction. <P>SOLUTION: The nipping net for farming, having superior monofilaments 2 that has a diameter of 0.5-2.0 mm, into the core parts of rope yarns 3, constituted of a synthetic fiber. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to aquaculture scissors used in a hanging method that is used for aquaculture of oysters, sea bream, sea cucumbers, sea cucumbers, scallops, kombu, etc. .

Conventionally, for example, oyster training methods used in Japan are roughly divided into (1) ground-spreading type, (2) cracked type, and (3) drooping type. It can be divided into a drooping type, a raft type and a longline type.
Of these, the simple drooping method is to build a tree or bamboo in 1-2 rows on the seabed at a depth of 2-4m at low tide, and create a shelf by horizontally crossing the cross at about 30cm above the low tide line. The drooping train is hung down. The drooping series is about 1.5m long wire with 6 ~ 10 masters alternately with 15 ~ 20cm bamboo pipes, and the shaved master seeded on a rope called scissors rope is about 10m long. There is a method of sandwiching them at intervals of about 40 cm, attaching them to wooden frames, fences, long lines, etc. and suspending them in the sea.
Here, the scissors rope generally uses polypropylene fibers, and the twist configuration generally uses a 2 × 2 twin rope. The thickness is about 6 mm to 20 mm.

Oyster farming (www.nn.iij4u.or.jp/~ookatou/net602/y220.htm)

However, in the conventional scissors, the initial narrowing property has been produced by devising the thickness of the fiber, the hardness of the fiber, or the twisted structure, and has been used for aquaculture.
However, increasing the hardness of the fiber will surely increase the resilience and improve the constriction, but the fibers will fluff due to abrasion with the outside, resulting in fast rope sag and strong scissors. The rope will cut quickly if it drops quickly.
Moreover, in order to reduce such a phenomenon, it has been devised such as making a rope with a hard polypropylene fiber as the core side, but even in this case, the initial constriction is good, but by repeated use, The constriction recovery is worsened, and as a result, the force to pinch the oyster master becomes weaker or the twist recovery is lost. In extreme cases, the scissors have a hole in the hole.
The present invention has been proposed in view of such conventional problems, and provides an aquaculture scissors that can be used stably for a long period of time without being reduced in stenosis even when used repeatedly. .

The aquaculture scissors rope according to the present invention has the following features in order to achieve the above-described object.
That is, the scissors rope for aquaculture according to the present invention is characterized in that a polyester monofilament is inserted into a core portion of a rope yarn in a rope yarn made of synthetic fiber.
Moreover, it is preferable that the diameter of the polyester monofilament in the core is 0.5 mm to 2.0 mm, and the number of polyester monofilaments to be inserted is about 1 to 5.

According to the present invention, it is possible to optimally produce stenosis by inserting a polyester monofilament into the core of a rope yarn and to produce a stenosis, and to provide an aquaculture scissors with good stenosis recoverability. Even if it is used for a long period of time, the stenosis does not deteriorate significantly, so it can be used until the rope breaks.
Moreover, it can be used for various aquaculture by using appropriately the thickness and the number of insertions of a polyester monofilament.
Furthermore, the polyester monofilament is protected by the synthetic fiber and is not damaged by scratching from the outside, by being arranged so as to surround the rope yarn made of ordinary synthetic fiber around the polyester monofilament of the core part, It has the effect of withstanding long-term use.
Moreover, regarding the manufacture of the present invention, it can be manufactured using a conventional rope rope rope as it is, and can be manufactured at low cost.

Hereinafter, with reference to the drawings, embodiments of the aquaculture scissors rope according to the present invention will be described.
FIG. 1 is a schematic cross-sectional view showing an aquatic scissors rope according to an embodiment of the present invention, FIG. 2 is an external explanatory view of an aquatic scissors rope according to an embodiment of the present invention, and FIG. 3 is a schematic diagram showing a use state. is there.

As shown in FIG. 1, the aquaculture scissors rope 1 according to the embodiment of the present invention is manufactured by inserting a polyester monofilament 2 into the core of a rope yarn.
The diameter of the polyester monofilament in the core part is preferably 0.5 to 2.0 mm, and the number of cores inserted into the core part by target cultivation is preferably about 1 to 5.
Here, when the diameter of the polyester monofilament is 0.5 mm or less, a satisfactory constriction property cannot be obtained even if the number of the polyester monofilaments inserted into the core is increased, and the cost increases. In addition, when the thickness is 2.0 mm or more, the scissors rope becomes too hard, so that the work of pinching becomes difficult and the burden on the operator becomes great.

Next, the aquaculture scissors rope 1 has an outer peripheral rope yarn 3 formed around the polyester monofilament 2 at the core. Since the outer peripheral rope yarn 3 has a role of protecting the above-described polyester monofilament from abrasion with the outside, it is not particularly necessary to focus on the recoverability of stenosis, and the cost, quality, etc. are comprehensive. Select based on judgment. Therefore, the synthetic fibers constituting the outer peripheral rope yarn 3 are, for example, polyester fibers, nylon fibers, polyethylene fibers, polypropylene fibers, vinylon fibers, high-performance fibers (for example, ultrahigh molecular weight polyethylene, aramid fibers, polyarylate fibers), etc. However, polypropylene fiber is particularly preferable from the viewpoint of cost and quality.

In addition, the scissor rope 1 for culture | cultivation with good constriction recoverability of this invention is a rope which has arrange | positioned the polyester monofilament in the core part with the normal rope making machine. That is, a yarn is obtained by twisting and twisting the raw yarn, and a strand is created by arranging the necessary number of yarns. At the time of strand production, a rope is produced so that it becomes a polyester monofilament at the core, and this is twisted 2 × 2 to produce a pair of aquatic scissors.
In addition, although 2x2 child is preferable, 3x2 child, 4x2 child, etc. are employable.
Then, as shown in FIG. 3, the aquaculture scissors rope 1 according to the present invention is twisted back at regular intervals and sandwiched with a master 4 such as a fry shellfish as in the case of a normal aquaculture scissors rope 1. Do.

Next, based on a concrete Example, the aquatic scissors rope according to the present invention will be described.
<Example 1>
25 ropes of 3000 denier fibers as rope yarns and 2 polyester monofilaments of 1.0 mm in the core were used to obtain 2 × 2 twin-twisted ropes with a rope-making machine.
<Comparative Example 1>
A rope was produced in the same manner as in Example 1 except that the number of the 3000 denier polypropylene fibers used in Example 1 was 34, and the polyester monofilament at the core was not used.
<Comparison result>
The performance results of the scissors rope of Example 1 and Comparative Example 1 are shown in Table 1.

As described above, it was found that the scissors rope according to the present invention optimally maintains sufficient stenosis even when used for 3 years. On the other hand, in the case of using only ordinary polypropylene fibers, the constriction was good only in the first year, and the constriction was bad in the third year.

It is a front view which shows the structure of this invention. It is an expanded section of the present invention. It is explanatory drawing which shows the form of concrete use of this invention.

Explanation of symbols

1 Scissors rope 2 Polyester monofilament 3 Rope yarn 4 Master

Claims (3)

  A scissor rope for aquaculture with good constriction recovery, characterized in that a polyester monofilament is inserted into the core of the rope yarn in a rope yarn made of synthetic fiber. The diameter of the polyester monofilament in the core portion is 0.5 mm to 2.0 mm, the aquaculture scissors rope having good constriction recoverability according to claim 1.
  The number of polyester monofilaments to be inserted is from 1 to 5, and the scissors for aquaculture with good stenosis recovery characteristics according to claim 1 or 2.

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