Lure

Abstract

To provide a lure capable of promoting advancement of biodegradation under a degradation environment and capable of maintaining a stable performance for a use period.SOLUTION: A lure has a lure body 10 formed of a marine biodegradable resin material. The lure includes: a plurality of projection parts 21 provided on a surface 10d of the lure body 10; and recess parts 22 formed between the projection parts 21. A distal end of each projection part 21 is formed by a curve surface or formed by a plane surface in which a top surface and a side surface are connected so as to form an obtuse angle.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lure. [Background technology]

[0002] BACKGROUND ART Conventionally, lures have been known that have a plurality of protrusions on the surface of the lure body for the purpose of improving the bite of fish, etc. (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4450697 Summary of the Invention [Problem to be solved by the invention]

[0004] However, conventional lures have the following problems. That is, in recent years, there has been a demand for lures made of marine biodegradable resins. When convex portions are formed on such marine biodegradable resins, if the convex portions have edges on the outermost surface, there is a problem that water resistance is generated and the dart width becomes too narrow. Furthermore, there are problems such as the edge portion changing shape after multiple uses, making the quality unstable, and the edge portion becoming prone to adhesion of foreign matter such as dust, so there is room for improvement in this regard.

[0005] The present invention has been made in consideration of the above circumstances, and its object is to provide a lure that can promote the progress of biodegradation in a degradative environment. Another object of the present invention is to provide a marine biodegradable lure that maintains stable performance over a period of use. [Means for solving the problem]

[0006] (1) A first aspect of the lure according to the present invention is a lure having a lure body made of a marine biodegradable resin material, characterized in that it has a plurality of protrusions on the surface of the lure body and recesses formed between the protrusions, and the tips of the protrusions are formed as curved surfaces or as flat surfaces whose top and side surfaces are connected at an obtuse angle.

[0007] According to the first aspect of the lure of the present invention, the unevenness of the convex and concave portions facilitates the formation of a microbial biofilm on the surface of the lure body, promoting biodegradation. Therefore, even if the lure becomes snagged and remains in the sea unintentionally by the angler, the lure will biodegrade, reducing the burden on the environment. In addition, in this embodiment, the tip of the convex portion is formed by a curved surface or a flat surface connected at an obtuse angle, so even if the tip breaks down, the overall shape of the convex portion does not change significantly, and the fluid resistance does not change significantly. Furthermore, in this embodiment, foreign matter such as dust in the water is less likely to adhere to the tip than when a sharp edge is formed at the tip.

[0008] (2) In a second aspect of the present invention, in the lure of the first aspect, a marine biodegradable fiber fabric is attached to the surface of the lure body, and the convex and concave portions are preferably formed by a fiber shape portion on the surface of the marine biodegradable fiber fabric.

[0009] In this case, there is no need to process the surface of the mold for the lure body into irregularities, and there is no need to consider mold releasability during molding.

[0010] (3) A third aspect of the present invention may be characterized in that in the lure of the second aspect, the marine biodegradable fiber fabric is a nonwoven fabric.

[0011] In this case, the nonwoven fabric can prolong the moisture retention time, which is advantageous for the formation of a biofilm, especially in an environment where the lure is washed up on a shore or rolls on the shore.

[0012] (4) In a fourth aspect of the present invention, in the lure of the second or third aspect, it is preferable that the marine biodegradable fiber fabric is replaceable on the surface of the lure body.

[0013] In this case, by replacing the marine biodegradable fiber fabric, the shape and weight of the lure do not change significantly, and the lure can be used for a long period of time with stable performance.

[0014] (5) A fifth aspect of the present invention may be characterized in that, in the lure of the first aspect, the uneven portion formed by the convex portions and the concave portions is provided in a state in which a retarding material that retards biodegradation is held.

[0015] In this case, if the lure is left in the ocean for a long period of time, the retarding material, which is a water-soluble material with low environmental impact, such as vegetable oil or animal or plant wax, or a retarding material that biodegrades relatively slowly, such as cellulose acetate with an acetyl group substitution degree of 2.5 to 3.0, held in the uneven portion of the lure body, will dissolve in the water or biodegrade first, thereby promoting the biodegradation of the lure body. Furthermore, if the lure is used repeatedly, the lure can be used for a long period of time by coating it with a retarding material or immersing it in a material. Furthermore, in this embodiment, by having a concave-convex structure, it is possible to control the retardation material according to the height of the concave-convex structure. Furthermore, in this embodiment, the tip of the convex portion is a curved surface or a shape formed by a plane connected at an obtuse angle, so that the delay material can be easily held in the concave-convex portion.

[0016] (6) In a sixth aspect of the present invention, the lure of the first aspect may have a hollow portion inside.

[0017] In this case, if the outer shell of the lure body biodegrades and seawater enters the interior, biodegradation will proceed from both the inside and outside, shortening the decomposition time. [Effects of the Invention]

[0018] The lure according to the present invention can promote the progress of biodegradation in a decomposition environment, and can maintain stable performance over a period of use. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a side view of a lure according to a first embodiment of the present invention. FIG. [Figure 2] FIG. 1 is a cross-sectional view showing a portion of the surface of the lure body. [Figure 3] FIG. 10 is a cross-sectional view showing a portion of the surface of a lure body according to a first modified example. [Figure 4] FIG. 10 is a cross-sectional view showing a portion of the surface of a lure body according to a second modified example. [Figure 5] FIG. 10 is a cross-sectional view of a lure according to a second embodiment, showing a state in which a marine biodegradable fiber fabric is being attached to the surface of the lure body. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, embodiments of the lure according to the present invention will be described with reference to the drawings. In each drawing, the scale of each component may be appropriately changed as necessary to make each component large enough to be visible.

[0021] FIG. 1 is a side view of a lure 1 according to a first embodiment. As shown in FIG. 1, the lure 1 of the first embodiment is used for squid fishing, and is an example of a lure made of a biodegradable resin material and shaped like a shrimp, known as an egi.

[0022] Here, in the lure 1, the direction in which the head and tail are aligned is defined as the front-to-back direction X1, the head side is defined as the front or front side, and the tail side is defined as the rear or back side. In addition, the lateral direction perpendicular to the front-to-back direction X1 when viewed from above is defined as the left-to-right direction X2 in the following description.

[0023] The lure 1 has a lure main body 10 which is made up of a pair of bodies 10A and 10B which are split into two halves, left and right, joined together (see FIG. 5). The lure main body 10 is formed in a streamlined shape that mimics a fish, and is integrally formed by joining the peripheral edges of the pair of half bodies 10A and 10B together by adhesive bonding, welding, or the like. The lure main body 10 has a head 11, a trunk 12, and a tail 13 which are integrally formed. The head 11, body 12, and tail 13 may each be separated, and each section may be provided to be able to swing freely in the left-right direction X2. In Fig. 1, the left side of the drawing is the front end 10a of the lure body 10 on the head 11 side, and the right side of the drawing is the rear end 10b of the lure body 10 on the tail 13 side.

[0024] The lure body 10 has a shape in which the cross section is largest at the center in the front-to-rear direction X1. That is, the lure body 10 becomes thicker from the front end 10a to the center and tapers from the center to the rear end 10b, forming a smooth curve overall.

[0025] The lure body 10 has a body 12 that is hollow, for example. The head 11 and tail 13 are solid. The lure body 10 is made of a marine biodegradable resin material. Here, marine biodegradable resins include biomass plastics such as cellulose acetate and PHA (polyhydroxyalkanoate). In particular, PHAs such as P3HB (poly[(R)-3-hydroxybutyrate]) and its copolymers P3HB4HB (poly[(R)-3-hydroxybutyrate-co-4-hydroxybutyrate]), P3HBV (poly[(R)-3-hydroxybutyrate-co-(R)-3-hydroxyvalerate]), and P3HBH (poly[(R)-3-hydroxybutyrate-co-(R)-3-hydroxyhexanoate]) are excellent in biodegradability in seawater (marine biodegradability).

[0026] The lure body 10 has a front end 10a provided with a ring-shaped line eye 61 for attaching a fishing line. The rear end 10b of the lure body 10 and the underside 10c of the trunk 12 each have hook eyes 62, 63 for connecting a fishing hook 31.

[0027] The surface 10d of the lure body 10 is provided with a plurality of ridges 21 (ridges) and recesses 22 (recesses) formed between the ridges 21. The ridges 21 and recesses 22 extend alternately and in large numbers on the surface 10d of the lure body 10 in a direction perpendicular to the front-rear direction X1. The protruding height of the ridges 21 (the height from the protruding tip of the ridge 21 to the bottom surface of the recess 22) is preferably about 0.01 to 1.2 mm, for example. These recessed and protruding shapes can be formed by injection molding the above-mentioned marine biodegradable resin.

[0028] As shown in Fig. 2, the entire convex portion of the convex rib portion 21 is formed by a curved surface 21a in a cross-sectional view. In Fig. 2, the concave rib portion 22 is a flat surface 22a that connects the base ends of the curved surfaces 21a of adjacent convex rib portions 21. Note that only the protruding tip portion of the convex rib portion 21 may be curved.

[0029] Furthermore, the shape of the convex rib portion 21 is not limited to the curved shape shown in Fig. 2. For example, as in a first modified example shown in Fig. 3, the convex rib portion 21A may have a shape formed by a plane in which the top surface 21b and the side surface 21c are connected at an obtuse angle in cross section.

[0030] 4, the entire convex portion of the convex streak portion 21B may be formed by the curved surface 21a in cross section, and the concave streak portion 22A may be formed by the curved surface 22b in cross section. In FIG. 4, the radius of curvature of the curved surface 22b of the concave streak portion 22A is set to be larger than the radius of curvature of the curved surface 21a of the convex streak portion 21B.

[0031] When the grooves 22 are curved surfaces 22b as in the second modified example or flat surfaces with obtuse angles, this has the advantage that microorganisms adhering to the grooves 22 can be easily washed away. On the other hand, when the grooves 22 are formed with acute angles, this has the advantage that microorganisms can be easily retained.

[0032] The uneven portion formed by the ridge portion 21 and the groove portion 22 may be provided with a retarding material that retards biodegradation. By appropriately setting the spacing, size, and height difference of these uneven portions, the amount of retarding material retained and the period during which the lure can be used can be appropriately adjusted.

[0033] FIG. 5 shows a lure 1A of a second embodiment in which a marine biodegradable fiber fabric 20 having ridges 21 and grooves 22 is attached to the surface 10d of the lure body 10. That is, the ridges 21 and grooves 22 are formed by the fiber shaped portions of the surface 20a of the marine biodegradable fiber fabric 20. A cellulose nonwoven fabric, for example, is used as the marine biodegradable fiber fabric 20. FIG. 5 shows the lure 1A in the process of being attached to the surface 10d of the lure body 10. The two-dot chain line in FIG. 5 shows the marine biodegradable fiber fabric 20 attached to the surface 10d of the lure body 10. Such marine biodegradable fiber fabric 20 is attached to the surface 10d of the lure body 10 with an adhesive material containing starch, and is replaceable.

[0034] Next, the operation of the lures 1, 1A configured as described above will be described in detail with reference to the drawings. The lure 1 according to this embodiment has a lure body 10 made of a marine biodegradable resin material. The lure 1 has a plurality of ridges 21 provided on a surface 10d of the lure body 10, and grooves 22 formed between the ridges 21. The tip of the ridge 21 is formed by a curved surface 21a, or is formed by a flat surface where a top surface 21b and a side surface 21c are connected at an obtuse angle.

[0035] According to the lure 1 of this embodiment, the unevenness of the ridges 21 and grooves 22 facilitates the formation of a microbial biofilm on the surface 10d of the lure body 10, promoting biodegradation. Therefore, even if the lure 1 is accidentally left in the sea due to snagging or other reasons, the lure 1 biodegrades, reducing the burden on the environment.

[0036] Furthermore, in the lure 1 of this embodiment, the tip of the ridge portion 21 is formed by a curved surface 21a or a plane connected at an obtuse angle, so even if the tip disassembles, the overall shape of the ridge portion 21 does not change significantly, and the fluid resistance does not change significantly.

[0037] Furthermore, in the lures 1 and 1A of each embodiment, foreign matter such as underwater debris is less likely to adhere to them than when sharp edges are formed at the tips of the convex portions.

[0038] In the lure 1A of the second embodiment, a marine biodegradable fiber fabric 20 is attached to the surface 10d of the lure body 10. The convex rib portion 21 and the concave rib portion 22 are formed by the fiber shape portion of the surface 20a of the marine biodegradable fiber fabric 20. Therefore, it is no longer necessary to process the surface of the mold for the lure body 10 into irregularities, and there is no need to consider mold releasability during molding.

[0039] Furthermore, in the second embodiment, when the marine biodegradable fiber fabric 20 is a nonwoven fabric, the nonwoven fabric can prolong the moisture retention time, which is advantageous for the formation of a biofilm. In particular, in an environment where the lure 1 is washed up on a shore or rolls on the shore, a biofilm can be formed for a long time.

[0040] In the second embodiment, the marine biodegradable fiber fabric 20 is replaceable with respect to the surface 10d of the lure body 10. As a result, the shape and weight of the lure 1 do not change significantly even when the marine biodegradable fiber fabric 20 is replaced, and the lure 1A can be used for a long period of time with stable performance.

[0041] In addition, in the lures 1 and 1A of each embodiment, the uneven portion formed by the ridge portion 21 and the groove portion 22 is provided in a state in which a retarding material that retards biodegradation is held. As a result, if the lure 1, 1A is left in the ocean for a long period of time, the retarding material, such as a water-soluble material with low environmental impact, such as vegetable oils or animal and plant waxes, or a marine biodegradable material with a slower rate of marine biodegradation than the lure body, which is held in the uneven portions of the lure body 10 or in the marine biodegradable fiber fabric 20 (for example, a material that biodegrades relatively slowly, such as cellulose acetate with an acetyl group substitution degree of 2.5 to 3.0), will dissolve in the water or biodegrade, accelerating the biodegradation of the lure body 10. Furthermore, when the lure 1, 1A is used repeatedly, the lure 1 can be used for a long period of time by applying a retarding material to it or immersing it in a material. Furthermore, in each embodiment, by having an uneven structure, it is possible to control the delay material according to the height of the uneven structure (the thickness and density of the fibers in the second embodiment). Furthermore, in the first embodiment, the tip of the convex ridge portion 21 is formed as a curved surface 21a or a flat surface that is connected at an obtuse angle, so that the delay material can be easily held in the concave and convex portions.

[0042] The lure 1, 1A according to each embodiment configured as described above can promote the progress of biodegradation in a decomposition environment. Furthermore, in each embodiment, stable performance can be maintained over a period of use.

[0043] Although the embodiments of the lure according to the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. Each embodiment can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. The embodiments and their modifications include, for example, those that can be easily imagined by a person skilled in the art, those that are substantially the same, and those that are equivalent.

[0044] For example, in the second embodiment, the marine biodegradable fiber fabric 20 is attached to the surface 10d of the lure body 10, and the convex ribs 21 and concave ribs 22 are formed by the fiber shaped portion of the surface 20a of the marine biodegradable fiber fabric 20, but the present invention is not limited to a configuration in which the convex ribs 21 and concave ribs 22 are formed by attaching the marine biodegradable fiber fabric 20. In addition, the present invention is not limited to the marine biodegradable fiber fabric 20 being replaceable on the surface 10d of the lure body 10 as in the second embodiment. Furthermore, although the marine biodegradable fiber fabric is a nonwoven fabric in the second embodiment, it may be a woven fabric or a knitted fabric.

[0045] Furthermore, the shapes and dimensions of the convex portions and recessed portions formed on the surface 10d of the lure body 10 are not limited to those of the respective embodiments. Furthermore, the shapes and dimensions of the convex portions and recessed portions formed on the surface 10d of the lure body 10 are not limited to those of the respective embodiments. That is, they are not limited to being convex or concave stripes as in the first embodiment. For example, the extending direction of the convex or concave stripes does not have to be perpendicular to the front-rear direction X1, but may be diagonally intersecting or parallel to the front-rear direction X1, or may be formed in a lattice pattern. Furthermore, it may be a protrusion that protrudes partially into a portion that is thinner than the internal hollow portion (hollow section).In short, it is sufficient if the tip of the protrusion has a curved surface or a shape formed by a flat surface where the top surface and side surface are connected at an obtuse angle.

[0046] Furthermore, the configuration of the lure, such as its shape and number of divisions, and the shape, number, and attachment position of the hooks attached to the lure can be changed as appropriate.

[0047] Although various biomass plastics have been mentioned as examples of marine biodegradable resins, the materials themselves do not have to be derived from living organisms. For example, PBSA, PCL, PA4, or biodegradable materials with additives that impart marine biodegradability are possible. [Explanation of symbols]

[0048] 1. 1A Lure 10 Lure body 10A, 10B body 10a Front end 10b Rear end 10d surface 11 Head 12 Torso 13 Tail 20. Marine biodegradable fiber fabric 20a surface 21, 21A, 21B Convex portion (convex portion) 21a Curved surface 21b Top 21c side 22, 22A Concave portion (recess) 22a plane 22b Curved surface X1 Anteroposterior direction X2 Left / right direction

Claims

1. A lure having a lure body made of a marine biodegradable resin material, A plurality of protrusions provided on the surface of the lure body; a recess formed between the protrusions, A lure in which the tip of the convex portion is formed by a curved surface, or by a flat surface whose top surface and side surface are connected at an obtuse angle.

2. A marine biodegradable fiber fabric is attached to the surface of the lure body, The lure according to claim 1 , wherein the protrusions and recesses are formed by fiber shapes on the surface of the marine biodegradable fiber fabric.

3. 3. The lure of claim 2, wherein the marine biodegradable fiber fabric is a nonwoven fabric.

4. 4. The lure according to claim 2 or 3, wherein the marine biodegradable fiber fabric is replaceable on the surface of the lure body.

5. The lure according to claim 1, wherein the uneven portion formed by the protrusions and the recesses is provided with a retarding material that retards biodegradation held therein.

6. The lure according to claim 1, wherein the lure body has a hollow portion therein.

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