JPH0675159U - Shellfish collection net - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention relates to a net for collecting shellfish such as scallops, and particularly to improve performance such as wear resistance and rotation of a ring net which is a main component thereof. [Structure] A ring net of a shellfish collecting net, in which main body rings 1 are connected by a forged integral connect ring 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a net for collecting shellfish such as scallops, and particularly to improve performance such as wear resistance and rotatability of a ring net which is a main component thereof.

[0002]

[Prior art]

 A typical example of a net for collecting shellfish such as scallops is shown in Fig. 2. In the figure, 3 is a nylon mesh, 4 is a metal mesh, 5 is a round bar, 6 is a ring mesh, 7 is a metal mesh, and 8 is a tooth. To use this, as shown in FIG. 3, fold it in two at the round bar 5 and pierce the tooth 8 into the seabed 9 with the ring net 6, the wire net 7 and the tooth 8 at the bottom. , Tow the whole in the direction of the arrow, dig up the scallop from the seabed 9, and collect it in the net. In addition, in FIG. 3, a net surface is actually formed on the side surface in the traveling direction of the net, but that part is omitted.

In the above-mentioned conventional technique, the portion of the ring net 6 is easily worn because trapped scallops and the like enter the bottom of the sea. As a typical example of a conventional ring network, first, as shown in FIG. 4, there is one in which the present rings 10, 10, ... Are connected to each other by sprinkling washers 11, 11 ,. That is, the metal main body rings 10 that have been welded in advance are connected to each other in a mesh shape by opening and fitting and closing the non-connecting portion of the spring washer 11 using a punch or the like. Two spring washers 11 are used per place. In another form, the main ring and the connect ring are both welded. Either may be welded first, but other unwelded rings are opened and fitted to the rings formed by welding first, then the rings are closed, and the closed portions are welded and sequentially connected.

[0004]

[Problems to be solved by the device]

 The spring washer-type ring net has some weak points in terms of strength due to rapid wear of the spring washer and the existence of the non-connecting portion. In addition, when knitting a net with a spring washer, it takes a lot of work because it is opened by pliers one by one, connected and then closed, and it also takes time to repair when the net is broken.

If the welding method is used, welding burrs naturally occur at the welding points. When this welding burr pulls the entire net on the seabed, it restrains the rings from one another, especially the connecting ring of the small ring does not rotate evenly, and is dragged by contacting the seabed in only one direction, causing a piece of connecting ring. It causes the decrease and greatly shortens the life of the net.

[0006] The service life of these conventional nets has been newly changed at an average rate of 2 to 3 pieces per season (eg, May to November for scallops). In the present invention, the shellfish collecting net is intended to have a life of one season or more, and the above-mentioned replacement man-hours and repair work are reduced.

[0007]

[Means for Solving the Problems]

 The present invention is a shellfish collecting net, characterized in that the shell netting comprises a ring net formed by connecting a main body ring with a forged integral connecting ring.

That is, in the present invention, it is considered that the opening of the connection ring, such as a spring washer, and the protrusion of casting burrs should be eliminated. The ring had a circular cross-section and the forging method was used to form it in order to prevent protruding parts such as burrs. In order to improve the wear resistance of this forged connect ring, a predetermined heat treatment is applied after forming. The body ring, which is a large ring, was passed through the connecting ring thus constructed, and the body ring was upset welded to knit the ring net, which is the main part of the entire scallop net. Regarding the sizes of the body ring and the connect ring, the body ring has an inner diameter of 85 to 95 mm and the wire diameter of the ring part is 5 to 7 mm, and the connect ring connecting them has an inner diameter (D) of 15 according to past experience. It was found that the rotatability was very good in the range of -25 mm and the ring diameter (d) of 5.5-9 mm. The standard range is D / d = 2-3.

[0009]

【Example】

 FIG. 1 is a plan view showing a state in which the main body rings 1, 1 are connected to each other with a connecting ring 2. In the case of the example, D = 18 mm and d = 8 mm. The main body ring 1 has D = 90 mm and d = 6.5 mm. The material of the main body ring was JIS G 3521, SWC, without tempering, and the connecting ring was a forged product of JIS G 4801, SUP 6, 9, 12, JIS G 4051 S45C with tempering. .

[0010]

[Effect of device]

 In the present invention, the body ring is forged and molded, so the ring has excellent rotatability and strength, so that even if the seabed is dragged when collecting shellfish, it will be worn And a long service life can be obtained. By the way, it was confirmed that the number of net exchanges per season was one in the test operation at the scallop fishing ground in Hokkaido.

[Brief description of drawings]

FIG. 1 is an explanatory view of joining a main body ring and a connect ring in a net of the present invention.

FIG. 2 is a development view of an example of a scallop collecting net.

FIG. 3 is an explanatory view of a mode of using the scallop collecting net.

FIG. 4 is an explanatory diagram of a configuration of a conventional ring network.

FIG. 5 is an explanatory diagram of another configuration of the conventional ring network.

[Explanation of symbols]

 1 Main body ring 2 Connect ring 3 Nylon net 4 Wire net 5 Round bar 6 Ring net 7 Wire net 8 Tooth 9 Seabed 10 Main body ring 11 Spring washer

Claims (2)

[Scope of utility model registration request] 1. A shellfish collecting net, comprising a ring net formed by connecting a main body ring with a forged integral connect ring. 2. The body ring has an inner diameter of 85 to 95 mm,
The shellfish collecting net according to claim 1, wherein the wire diameter of the ring portion is 5 to 7 mm, the inner diameter of the connect ring is 15 to 25 mm, and the wire diameter of the ring portion is 5.5 to 9 mm.