JPH06276886A - Titanium hexagonal crawl net - Google Patents

Abstract

PURPOSE:To obtain a net, resistant to corrosion in the sea and capable of remarkably prolonging the useful life and reducing the construction cost of a crawl without wearing due to no abrasion by alternately twisting pure titanium wires and knitting the wires into a hexagonal wire netlike shape. CONSTITUTION:Fine wires having 1.2-2.0mm diameter are used as pure titanium wires 1 and alternately twisted three times at 20-55mm pitch 22 to provide nearly hexagonal meshes 21 and 2m net width. The wires are connected, knitted into a hexagonal wire netlike shape and rolled to 30m length. Thereby, the objective titanium hexagonal crawl net 2 is obtained. Furthermore, the titanium hexagonal crawl net 2 is hung from a circular or square upper frame 4 in the form of a reed screen. Chemical fiber ropes 6 are passed through all the meshes 21 and fixed to connect the upper frame 4 to the base frame 5 with the ropes 6. Thereby, the titanium net crawl, resistant to corrosion by seawater and capable of remarkably prolonging the useful life without abrading even by external force such as waves, etc., is obtained at a low construction cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a net cage in which a peripheral wall and a bottom surface are made of a net.

[0002]

2. Description of the Related Art Heretofore, a diamond wire net has been mainly used for the net of the net cage. There has been an attempt to use a titanium net formed by knitting pure titanium wire into a rhombus-shaped wire net.

[0003]

However, this has the following drawbacks. (I). The net cage shown in "Fig. 2", which is composed of a rhombic wire mesh of zinc-drawn steel wire, is easily corroded by seawater and has a short service life, and there is a concern about zinc pollution. In order to solve these drawbacks, there has been an attempt to use a titanium net in which pure titanium wires that are resistant to seawater corrosion are knitted into a substantially diamond-shaped wire mesh. (B). In a titanium net formed by knitting a pure titanium wire into a rhombus-shaped wire mesh, the wires are engaged with each other at the corners of the mesh, but in seawater, the wire and the wire are repeatedly engaged and disengaged. Worn and thinned due to contact friction. Pure titanium wire has a rough surface and is easily worn away. Waves, fish movements, handling of cages, etc. are the causes of the repetitive movements of mating and sliding. (C). The fine titanium wire could not be used due to the fear of the above-mentioned abrasion phenomenon. Therefore, the cost of the network was not reduced. The present invention has been made to solve these problems.

[0004]

In order to achieve the above object, the titanium turtle shell cage net (2) of the present invention is formed by twisting pure titanium wires (1) alternately to form a turtle wire mesh. Is.

[0005]

[Action]

(I). As shown in "Fig. 1", the pure titanium wires (1) that compose the titanium turtle shell cage net (2) are twisted and joined alternately. Does not happen. Therefore, the pure titanium wire (1) has no contact friction and is not worn away. (B). Since there is no concern about the wear of the pure titanium wire (1), it is possible to reduce the wire diameter to reduce the cost.

[0006]

EXAMPLES Examples of the present invention will be described below.
As shown in "Fig. 1", the titanium turtle shell net (2)
The pure titanium wire (1) is knitted by alternately twisting and twisting three times. Pure titanium wire (1) is 1.2-2.
Fine items such as 0 mm are used. The mesh (21) has a substantially regular hexagonal shape, the pitch (22) is 20 to 55 mm, and the mesh width is 2 to m. Usually, it is rolled and shipped, but about 3
It can be up to 0 m. Since the pure titanium wire (1) is connected by twisting three times (23), there is no detachment or sliding of the wire in the case of the diamond wire mesh. Therefore, there is no abrasion due to contact friction. Moreover, since there is no concern about abrasion, a fine titanium wire (1) is used. The titanium turtle shell cage net (2) of the present invention has the above-mentioned structure, and when it is used, as shown in "Fig. 3", (a). The titanium turtle shell cage net (2) is screened on the circular or rectangular upper frame (4), and the synthetic fiber rope is fixed through all the meshes (21). (B). To connect the screened titanium net (2), a connecting fitting to which a protective material for the wire to be fixed is adhered is used. (C). The upper frame (4) and the bottom frame (5) are connected by a rope to reduce the external force applied to the titanium mesh (2). It is desirable to consider that contact friction does not occur.

[0006]

EFFECTS OF THE INVENTION Since the "titanium turtle shell cage net" of the present invention does not wear out and is not worn, and has the characteristic of titanium that is resistant to corrosion of seawater, the service life is significantly extended as compared with the conventional diamond wire mesh. Be expected. In addition, since the titanium turtle shell cage is made of fine titanium wire, the cost will be reduced and the construction cost of the titanium mesh cage will be low, so it is expected that this cage will spread. In addition, conventional cages of rhombus wire mesh have drawbacks such as no pollution of waste materials due to concerns about zinc pollution, but since these drawbacks are all eliminated, it can be said to be an extremely useful invention for the aquaculture industry.

[Brief description of drawings]

FIG. 1 is a front view of a main part of the present invention.

FIG. 2 is a front view of a main part of a conventional diamond-shaped wire mesh.

FIG. 3 is a perspective view showing a use mode of the present invention.

[Explanation of symbols]

 1 Pure titanium wire 2 Titanium turtle shell cage net 21 Mesh 22 Mesh pitch 23 Wire twisting 3 Titanium mesh cage 4 Top frame 5 Bottom frame 6 Rope 7 Rhombus wire mesh

Claims (1)

[Claims] 1. A titanium turtle shell cage net (2) in which pure titanium wires (1) are alternately twisted and knitted to form a turtle wire mesh.