JPH025731Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a joint structure for floats for floating nets, rafts, etc. used for fishing shells, seaweed, oysters, pearls, etc., and it streamlines and easily connects the work. This is what I did.

Conventionally, when attaching a float to the main body rope of a net or raft, the main body rope is passed through a hole in the float, and then tied tightly with a ``tie string'' to connect the body rope, which requires a lot of labor.

Since floats are used while immersed in water, they have the drawback of being subject to abrasion, damage, and washout due to waves, and float bonding requires experience and mastery of bonding techniques.

These points make it difficult to procure labor in nearby locations, increasing material transportation costs.

The present invention allows anyone to easily attach a float without the above-mentioned drawbacks.

That is, the present invention relates to "a structure for joining the float and the main rope, in which the float is connected to the main rope by a shrinkable cord made of fibers that shrink with water, and the shrinkable cord is contracted by water and tightly attached to the main rope." . This invention uses a shrink cord that easily shrinks in room temperature water such as seawater or fresh water to connect the float to the rope of the main body of a net or raft. Even if you don't have to tie it tightly like a rope, it can shrink in the water and tie it tightly as a result. Depending on the structure with the float, the main body rope can be tied in a loop shape with the front of the contraction cord. Instead of tying (tying) the float to the main body rope, you can simply wrap it around the main body rope and secure the float under tension. It is a cord that can be bonded together, making the joining work extremely efficient and simple, and utilizes a cord that has a high shrinkage rate and stress, and is made of fiber or film that does not return to its original state once it shrinks. By doing so, we were able to achieve the above objectives.

A method for obtaining such a shrinkable cord will be described later, and the joining operation and joint structure of the float and main body rope of the present invention using the shrinkable cord will be explained with reference to drawing examples.

The illustrated example shows an example in which a shrinkable cord is made into a loop in advance and the float is connected to the main body rope without tying the shrinkable cord. That is,
In FIG. 1, a float 1 is provided with a groove 1' on at least one surface thereof into which a main body rope 2 such as a net or a raft and a contraction cord 3 are fitted, and the main body rope 2 is inserted into the float at a predetermined location on the main body rope 2. A pre-made loop-shaped contraction cord 3 is inserted into the groove 1' of the
[Fig. 1 a] and the loop code
Twist it 180 degrees, hold the intersection, and wrap the other end of the contraction cord 3 around the main rope 2 3 or 4 times by straddling the right end of the float 1, reaching the left end, and straddling the left end. ) [Fig. 1b] In this state, the shrinkable cord 3 is contracted by pouring water on it or putting it in water, and the float 1 and main rope 2 are
are tightly fixed (Fig. 1c).
Figure 2 shows a structure for connecting the float 1 to the main rope 2, which has a different structure.The loop-shaped contraction cord 3, which has been made before, is wound around a predetermined point on the main rope 2, and the other end is tied to the main rope 2. By hanging it over the groove 1' of the float 1 and soaking it with water or placing it in water, the shrinkable cord 3 is contracted, and the float 1 and the main body rope 2 are tightly attached. The example shown is an example in which the float and the main rope are tightly connected without tying the contraction cord together, and it is clear that the joining process is extremely efficient and simple. Even if a shrinkable cord is connected to the float 1 and the main body rope 2 and tied together without applying force, the shrinkable cord will be contracted by subsequent water application or immersion in water, and the float and main body rope will be firmly connected. So,
When tying the shrinkable cords together, there is no need to apply force and tighten while tying the cords, as is the case with the conventional method, and it is also efficient and simple.

Due to its workability, the above-mentioned shrinkable cord having a wet shrinkage ability that shrinks with water shrinks by 10 to 60% within 25 minutes, preferably within 1 minute, after soaking in water at 40°C or lower. It is preferable that the cord shrinks by 25% or more and has a shrinkage stress of 0.02 to 0.2 g per denier of the cord. Such a shrink cord can be made, for example, as follows.

In other words, polyvinyl alcohol (PVA) with a degree of polymerization of 300 to 2400 and a degree of saponification of 90 to 99.9 mol% is used as a raw material and subjected to normal dry or wet spinning (film formation), and is 1.5 times larger in an atmosphere of 130°C or less in a state containing moisture. Stretch it, then dry it and use it as is, or
Furthermore, it is heat treated under tension, and in the case of a wet method, it is then subjected to scouring treatment to remove salts, etc.
Obtain PVA fiber or film. In the case of a cord made of PVA fiber or film alone, that is, 100%, the shrinkage ability of the fiber or film can be utilized to the maximum, and the tight bonding effect can be maximized. % or less, the contractility can be fully utilized, and in this case, the price is also low, which is preferable. The thickness and length of the PVA fiber or film are not subject to any restrictions, and can be determined based on the shape of the cord, the thickness of the mating fiber, the fiber length, etc.
In order to exhibit its effect, it is necessary to mix at least 0.05% by weight in the cord.

The fiber or film material of the string-like material to be mixed with PVA fiber or film is as follows:
All materials conventionally used for strings, ropes, and netting can be used.

Contamination of PVA fibers or films does not only mean the case of contamination, but also includes the use of PVA fibers of appropriate length.
For example, blended spinning involves cutting pieces into 2.5 to 30 cm pieces and blending them with target fibers by mixing cotton, drawing, etc. to make a string-like product by a conventional method, and PVA obtained by a dry method.
This term includes twisting when a string-like object is made by twisting a monofilament with a target fiber or film.

In addition, in this specification, the term "cord" refers to a string-like object, a rope-like object, a net-like object, etc., and does not limit its form or thickness in any way. It may be selected as appropriate.

As explained above, the present invention is characterized in that a contraction cord is provided for joining the floats, and the effects of the present invention as seen from the examples are summarized below.

(1) Effect on work efficiency Compared to conventional float joining work, the work efficiency of joining work was improved by 2 to 4 times with floats using shrinkable cords.

Furthermore, the joining process is simple, and there is no need to pass the float through the main body rope, so it can be easily attached when the time for use has come or near the place of use.

(2) Usage Effects The float of the present invention is attached more securely than a tied float due to the contraction of the connecting cord, and can be used safely without moving up and down or left or right.

[Brief explanation of the drawing]

Figure 1 shows the connection work between the float of the present invention and the main rope, and shows the connection structure [Fig. 1c], and Figure 2 also shows the connection structure between another float and the main rope. It shows. 1 is the float, 2 is the net of the main body or the main rope of the raft, and 3 is the contraction cord.

Claims (1)

[Claims for Utility Model Registration] 1. Connection between the float and the main rope, in which the float is connected to the main rope by a shrinkable cord made of fibers that shrink with water, and the shrinkable cord is contracted by water and tightly attached to the main rope. structure. 2. The contraction cord is a loop-shaped contraction cord,
A structure for joining a float and a main body rope according to claim 1, wherein the contraction cord is not tied to the main body rope, but is wrapped around the main body rope to secure the float under tension. 3. The shrinkable cord is composed of water-soluble polyvinyl alcohol fibers or films that shrink by 10 to 60% within 1 minute when immersed in water at 40°C or below, or the fibers or films are made of natural, recycled or A joining structure between a float and a main body rope according to claim 1 or 2, which is a cord formed by being mixed with a synthetic fiber or film material. 4 The shrinkage cord is 0.02 per denier of the cord.
A joining structure between a float and a main rope according to any one of claims 1 to 3, which has a shrinkage stress of ~0.2 grams.