JP2001086910A - Fishing sinker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a fishing sinker made of a high-specific gravity synthetic resin capable of readily nipping a fishing line without separately equipping a main body with a hinge means, etc. SOLUTION: This fishing sinker is obtained by equipping a main body 1 of the fishing sinker, composed of a high-specific-gravity resin made to have a high specific gravity by compounding a flexible resin with a high-specific- gravity metal, with a slit 2 capable of nipping a fishing line, closable by the restoring force of the high-specific-gravity resin and openable by applying an external force to the main body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fishing weight having a slit formed therein so that a fishing line can be inserted and held.

[0002]

2. Description of the Related Art In general, fishing weights made of lead or brass (brass) are mainly used. As shown in FIGS. 5A and 5B, these fishing weights use a fishing line slidably inserted into a through hole 71 provided in a main body 7 (a) and a split weight provided in a main body 7 ′. There is a so-called "bump" (b) that holds the fishing line by inserting the fishing line into the groove 71 'and crushing the main body 7', and is used properly according to the purpose of the target fish or the fishing method. I have.

[0003] In recent years, fishing weights made of a metal material such as tungsten having a higher specific gravity than lead or brass have been developed, and the volume can be reduced even with the same weight, so that it is possible to reduce rooting. . Further, there has been developed a material which can prevent the fishing line from being damaged by mixing these high specific gravity metals with a resin and using the high specific gravity resin as a high specific gravity resin for a fishing weight.

Further, from the viewpoint of consideration for the natural environment,
Brass and tungsten, which are more harmless than harmful lead, are attracting attention. Some of them use a high specific gravity resin in which a biodegradable resin and tungsten are mixed, as seen in JP-A-11-48242. Have been developed and their demand is growing rapidly.

However, such fishing weights using brass or high specific gravity resin are not suitable for the characteristics shown in FIG.
A fishing weight that does not change the shape of the main body 7 when used as in (a) can be used. However, as shown in (b), a "combustion" that changes the shape of the main body 7 'when used. With regard to the fishing weight of the formula, it was difficult to use anything other than flexible lead.

That is, as shown in FIG. 5 (b), a "smashing" type fishing weight can be easily separated from the main body 7 'like lead.
It is necessary to use a material that can change the shape and maintain that state. However, the high specific gravity resin is restored by the elasticity of the resin even when the shape is changed, so that the fishing line cannot be held. For this reason, in order to use such a high specific gravity resin for a fishing bite of the “smash” type as shown in FIG.
As disclosed in Japanese Patent Application Laid-Open Publication No. H10-209, it is necessary to separately provide a flexible hinge means or the like on the main body.

[0007]

The present invention has been made based on the above background. That is, the present invention
An object of the present invention is to provide a fishing weight formed of a high specific gravity synthetic resin that can easily hold a fishing line without separately providing a hinge means or the like on a main body.

[0008]

The technical measures taken by the present inventor to achieve the above objects are as follows: (1) A high specific gravity obtained by mixing a high specific gravity metal with a flexible resin to increase the specific gravity. A fishing weight is provided with a slit formed in a main body made of resin and capable of holding a fishing line.

According to this means, since the fishing weight body made of high specific gravity resin has the slit, the fishing line is inserted through the slit without the need for hinge means and the like.
The fishing line can be easily held without damaging the fishing line.

Here, as the flexible resin used for the high specific gravity resin, vinyl chloride resin, polypropylene resin, polyamide resin, polyacetal resin, polyethylene resin, polycarbonate resin, polyphenylene sulfide resin and the like can be used. Use of biodegradable resins having biodegradable properties, such as aliphatic polyesters (polylactic acid, polyhydroxybutyric acid) and hydrolyzable resins having hydrolyzability, such as polyethylene terephthalate and polybutylene naphthalate Is also possible.

As described above, by using a biodegradable resin or a hydrolyzable resin, even if a fishing weight is discarded in water due to rooting or the like during actual fishing, the resin having a high specific gravity can be used. Since the fishing weight is made of a biodegradable resin such as polylactic acid, the fishing weight is decomposed into substances harmless to the natural environment (for example, water, carbon dioxide, lactic acid, and the like), leaving only a high specific gravity metal.

As the high specific gravity metal, a metal having a large specific gravity is used, and preferably, a heavy metal having a specific gravity of 4 or more is used. For example, brass (brass), stainless steel (SUS), tungsten, and the like can be used.
It is preferable to use tungsten which has a large specific gravity and does not harm living things or the environment.

Further, (2) in the fishing weight according to (1), the slit is closed by the restoring force of the high specific gravity resin to hold the fishing line.

According to this means, the slit is automatically closed by the restoring force of the high specific gravity resin, so that it is not necessary to crush the main body after inserting the fishing line as in the conventional crushing type. , Can easily hold the fishing line.

(3) In the fishing weight according to the above (1) or (2), the slit is expanded by applying an external stress to the main body so that a fishing line can be inserted. It is in.

According to this means, the slit can be expanded by applying an external stress to the main body, and a fishing weight can be provided in which the fishing line can be easily inserted through the slit. .

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing a fishing weight according to the present invention. In the figure, 1 indicates a main body of a fishing weight, and 2 indicates a slit.

The main body 1 is made of a high specific gravity resin obtained by mixing polylactic acid having biodegradability, which is a flexible resin, and tungsten, which is a high specific gravity metal, to increase the specific gravity. .

The body 1 has a slit 2 formed therein. The slit 2 is always closed by the elastic force (restoring force) of the high specific gravity resin used for the main body 1.

Both sides of the slit 2, that is, the slit 2
The convex portions 23 and the concave portions 24 are formed at positions facing each other on the support surfaces 21 and 22 of the main body 1 forming
When the slit 2 is closed, the convex portion 23 and the concave portion 24 mesh with each other.

The main body 1 has a projecting side projecting outward from the main body 1 on a side opposite to the place where the slit 2 is opened, that is, a communication portion 13 connecting the upper part 11 and the lower part 12 of the main body 1. Parts 14 and 15 are formed in two places.

The fishing weight thus formed is shown in FIG.
As shown in (a), the upper and lower parts 12 and 12 of the main body 1 are applied by applying external stresses P and P in the vertical direction to the protrusions 14 and 15, that is, by pressing the protrusions 14 and 15.
Rotates about the communication portion 13 as a fulcrum, and the slit 2 is opened up and down. Thereby, the fishing line 3 can be inserted into the slit 2.

When the external stresses P, P applied to the projections 14, 15 are relaxed, the slit 2 is automatically turned by the elastic force (restoring force) of the main body 1 as shown in FIG. It is closed and the fishing line 3 is held by the holding surfaces 21 and 22. Further, when the fishing line 3 is detached from the fishing weight, the slits 2 are expanded by applying vertical external stresses P, P to the protruding portions 14, 15 again as shown in FIG. Then, the fishing line 3 can be easily removed.

At this time, the support surfaces 21 and 22 of the slit 2
The fishing line 3 held by the support 2 is prevented from falling off from the slit 2 by the convex portions 23 and the concave portions 24 of the support surfaces 21 and 22. The fishing line 3 is held by the restoring force of the main body 1, but is prevented from being damaged by the elasticity of the high specific gravity resin.

As described above, the slit 2 is automatically closed by the elasticity (restoring force) of the main body 1 of the fishing weight formed of the high specific gravity resin, so that no hinge means or the like is provided. The fishing line 3 can be easily held and the trouble of crushing the main body 1 as in the conventional crushing type can be omitted.

Further, since the high specific gravity resin used for the main body 1 is formed of polylactic acid having a biodegradable property and tungsten of a high specific gravity metal, the fishing weight is temporarily immersed in water. Even if discarded, polylactic acid is decomposed into harmless substances such as water, carbon dioxide, and lactic acid, and the remaining tungsten is harmless to living organisms and the environment.
Does not adversely affect ecosystems and the environment.

FIG. 3 shows another embodiment of the present invention.
It is the schematic of the weight for fishing. In the figure, reference numeral 5 denotes a main body in which a cross section is formed in a substantially elliptical cylindrical shape by using a high specific gravity resin obtained by mixing a flexible silicone resin and a high specific gravity metal tungsten. The slit which penetrates the center of the main body 5 up and down is shown.

As shown in FIG. 3A, the slit 6
Elastic force (restoring force) of main body 5 formed of high specific gravity resin
Is constantly crushed and closed. At this time, the slit 6 crushed by the main body 5 is a line in the major axis direction of the ellipse in the cross section of the main body 5.

When attaching the fishing line 3, the side surfaces 51, 51 of the main body 5 are viewed from the major axis direction of the ellipse in the cross section of the main body 5.
External stresses P, P, that is, the side surfaces 51, 51
By pressing, the slit 6 expands as shown in FIG. 3B, and the fishing line 3 can be inserted.

Then, by relaxing the external stresses P, P pressing the side surfaces 51, 51, the slit 6 is closed,
The fishing line 3 is easily held. Conversely, when removing the held fishing line 3, by pressing the side surfaces 51, 51 again, the slit is expanded and the fishing line 3 can be easily removed.

FIG. 4 is a schematic view showing another embodiment of the fishing weight according to the present invention. Note that the reference numerals are the same as those in the embodiment shown in FIGS. 1 and 2. As shown in FIG. 4A, the main body 1 has a high specific gravity obtained by mixing polylactic acid having biodegradability, which is a flexible resin, and tungsten, which is a high specific gravity metal, to increase the specific gravity. It is formed of resin.

The body 1 has a slit 2 formed therein. The slit 2 is always closed by the elastic force (restoring force) of the high specific gravity resin used for the main body 1. Also,
The upper part 11 and the lower part 12 of the main body 1 are connected by a communicating part 13 on the side opposite to the place where the slit 2 is opened. The communication portion 13 is not formed with a protrusion that protrudes outward, but is formed with a smooth curved surface, so that it is possible to prevent the fishing line 3 from becoming entangled or becoming stuck.

Both sides of the slit 2, that is, the slit 2
The convex portions 23 and the concave portions 24 are formed at positions facing each other on the support surfaces 21 and 22 of the main body 1 forming
When the slit 2 is closed, the convex portion 23 and the concave portion 24 mesh with each other.

The fishing weight thus formed is shown in FIG.
As shown in (b), the communication part 1 of the upper part 11 and the lower part 12
By applying external stresses P and P in the vertical direction in the vicinity of 3, that is, by pressing the upper part 11 and the lower part 12 near the communicating part 13, the upper part 11 and the lower part 12 of the main body 1 rotate around the communicating part 13 as a fulcrum Then, the slit 2 is opened up and down. Thereby, the fishing line 3 can be inserted into the slit 2.

When the external stresses P, P applied to the upper part 11 and the lower part 12 near the communicating part 13 are relaxed,
As shown in (a), the slit 2 is automatically closed by the elastic force (restoring force) of the main body 1, and the fishing line 3 is held by the holding surfaces 21 and 22. Further, when the fishing line 3 is detached from the fishing weight, as shown in FIG. 4 (b), the external stresses P and P in the vertical direction are again applied to the upper part 11 and the lower part 12 near the communicating part 13, The slit 2 is expanded, and the fishing line 3 can be easily removed.

Although the present invention has been described above, the present invention is not limited to the above-described embodiment, and various forms are possible without departing from the essence thereof.

For example, in the embodiment shown in FIG.
Although the plurality of recesses 3 and the recesses 24 are formed, they may be formed one by one as in the embodiment in FIG.
The projections 23 and the depressions 24 need not be provided.

[0039]

According to the first aspect of the present invention, it is possible to provide a fishing weight that can easily be held without damaging the fishing line by inserting the fishing line into the slit without requiring hinge means or the like. Further, according to the second aspect of the present invention, since the slit is automatically closed by the restoring force of the high specific gravity resin, it is possible to save the labor of crushing the main body after inserting the fishing line as in the conventional crushing type. Thus, it is possible to provide a fishing weight that can easily hold a fishing line. Furthermore, according to the third aspect of the present invention, it is possible to provide a fishing weight that can expand the slit by applying an external stress to the main body and can easily insert a fishing line into the slit. .

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention and showing a fishing weight.

FIG. 2 is a schematic view showing a method of using the fishing weight shown in FIG. 1;

FIG. 3 is a schematic view showing another embodiment of the present invention, showing a fishing weight.

FIG. 4 is a schematic view showing another embodiment of the present invention and showing a fishing weight.

FIG. 5 is a schematic view showing a conventional fishing weight.

[Explanation of symbols]

 1,5 Main body 11 Upper part 12 Lower part 13 Communication part 14,15 Projection part 2,6 Slit 21,22 Protrusion part 23 Convex part 24 Depression 3 Fishing line 51 Side surface 71 Through hole 71 'Split groove

Claims (3)

[Claims] 1. A fishing weight comprising a body made of a high-specific-gravity resin obtained by mixing a high-specific-gravity metal with a flexible resin and having a slit capable of holding a fishing line. 2. The fishing weight according to claim 1, wherein the slit is closed by a restoring force of the high specific gravity resin to hold the fishing line. 3. The fishing weight according to claim 1, wherein the slit is expanded by applying an external stress to the main body, so that a fishing line can be inserted therethrough.