JP3301675B2 - Fishing hook and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in burrs and tips of fishing hooks and a novel method of manufacturing the same.

[0002]

2. Description of the Related Art A conventional hook (A ') has a sharp burr (2') formed by cutting and raising the inside of a hook portion (11 ') of a hook main body (1') as shown in FIG. And a gob-shaped burr (2 '') provided inside the tip of the hook main body (1 '') as shown in FIG. In the former, the frog (1 ') is effective to prevent the bait attached to the hook (A') from coming off, but on the other hand, when the fish catches, the sharp frog (2 ') If the tip (4 ') bites into the fish meat and tries to remove it forcibly, there is a problem that the fish meat is torn off and the wound is increased. In particular, when releasing a caught fish, it is necessary to avoid damaging the fish as much as possible.
Great care was required when removing the hook (A ') from the fish. Such an operation can seriously damage the fish in the case of a skilled person and the fish in an unskilled person, even with extreme care.

In addition, the burrs (2 ') in FIG. 24 are formed by cutting and raising as described above.
A sharp groove (13 ') is formed in the base (5') of (2 '), and the groove (1
A small crack may be seen at the bottom of 3 '). In such a case, if the fishhook (A') is removed from the fish or if the fish May be damaged due to excessive load.

[0004] The burrs (2 ') formed by cutting and erecting are attached to the base (5') of the hook main body (1 '), that is, the burrs.
(2 ') and the hook body (1') have a small area, so if a strong force is applied to the base (5 ') of the burrow (2') when a large fish is hooked, the sharp groove (13 There was a problem that stress concentration occurred in ') and the burrs (2') were easily broken.

On the other hand, as shown in FIG.
A fishing hook (A '') with a was proposed to overcome the disadvantages of the former. In this case, unlike the fishhook (A ') shown in FIG. 24, there is little damage to the fish, and no breakage of the burrs (2'') occurs. In addition to the above, there is a problem that the bumps are difficult to pass through the bait and it is difficult to attach the bait.

Further, since the cross section of the tip of the conventional hooks (A ') and (A'') is circular, the fish hooks
When (A ') (A'') is set, the hook point (1') of the hook (A ') (A'')
1 ') (11'') is caught in the mouth of the fish, and then the needle point (11') (11 '') tries to penetrate the inside of the fish through the surface of the mouth of the fish. Needle point (11 ') (11'')
Since the cross section of the body gradually becomes thicker from the tip to the rear, the oral cavity surface and the meat are pushed out and inserted.

[0007] In order to insert the needle tip portions (11 ') and (11 ") by pushing and spreading the hard oral surface and meat of the fish, the conventional needle tip portions (11') and (11 ') having a circular cross section are used. Hook (A ') with')
(A '') has a very high resistance, it is difficult to pierce the needle tip (12 ') (12'') if it is dull, and the fish hook (A') (A '' There is a drawback that it is very difficult to match the).

[0008]

DISCLOSURE OF THE INVENTION The present invention has been made in view of such conventional drawbacks, and the first problem to be solved by the present invention is that the upper side surface and the lower side surface of the needle tip portion are provided. By shaving either or both sides to form a flat surface or a concave curved surface and forming a sharp blade-shaped ridge at the intersection of the shaved surface, the insertion resistance of the needle tip is reduced as much as possible, In the development of a hook that facilitates the alignment, the second is in the development of a hook that not only has a very strong burr but also does not hurt the fish when it is removed. We are in the development of a manufacturing method that enables mass production.

[0009]

A fishing hook according to claim 1.
(A1) indicates the point (1) from the needle point (12) to the burrs (2).
The upper side surfaces (14) and the lower side surfaces (15) of (1) are shaved off, and shaving surfaces (21) and (22) are formed on the upper side surfaces (14) and the lower side surfaces (15). And a sharp edge-shaped ridge (18) at the portion where the shaved surfaces (21) and (22) are in contact with each other.
(19) and (20) are formed ''. The fishing hook (A2) according to claim 2 is characterized in that the hook portion (11) from the needle tip (12) to the burrs (2) is ) Is shaved off to form a shaving surface (21) at the upper side surfaces (14), and a sharp edge-like portion is formed at a portion where the shaving surfaces (21) are in contact with each other. The burrs on the burrs (18) are formed
From the lower side (15) to the bottom (1) from (12) to the burrs (2)
The part extending to 6) is formed in an arc-shaped cross section ". The fishing hook (A3) according to claim 3 is characterized in that" the hook from the tip (12) to the burrs (2) " The lower side surfaces (15) of the portion (11) are scraped off to form a shaving surface (22) at the lower side surfaces (15), and a sharp portion is formed at a portion where the shaving surfaces (22) are in contact with each other. A blade-shaped bottom ridge (20) is formed, and the upper side surface from the needle tip (12) to the burrs (2)
The portion from (14) to the upper surface (17) is formed in an arc-shaped cross section. "

In the case of the first aspect, the sharp ridges (18), (19) and (2) are formed at the intersection of the shaved surfaces (21) and (22) at the needle tip (11).
0) are formed, and in the case of claim 2, a sharp ridge portion (18) is formed at the intersection of the shaving surface (21), and in the case of claim 3, the shaving surface (22). A sharp ridge (20) is formed at the intersection of. Thus, when the hook (A) is fitted to the fish, the tip (12) of the hook (A) tries to penetrate the hard oral surface of the fish and bite into the meat of the fish. (1) Sharp ridge on blade (18) (1
9) (20) comes into contact with the mouth surface and meat of the fish and cuts it, resulting in less resistance at the time of insertion and easier insertion as compared with the conventional hooks (A ') and (A''). The insertion resistance is about half of that of the conventional example, though it depends on the sharpness of the needle tip (12) and the ridges (18), (19), (20). This point will be described in detail in an experimental example.

The fishhook (A) according to the fourth aspect is described as "Kaeri (2)
A straight line (L) connecting the rear end (5) of the
Angle (α) formed between 2) and the surface (L3) of the fishing hook body (1) located on the opposite side from the back (6) of the burrs (2) to the needle tip (12).
Is a right angle or an obtuse angle. "

According to this, even if the hook (A) pierces the fish and the tip (11) of the hook (A) including the burrs (2) bites into the meat, the surface (L3 ), The angle of the back (6) is large, so when removing the hook (A) from the fish, the tip (4) of the burrow (2) does not bite into the meat and the fish hook ( A) can be removed. In addition, even if a strong force is applied to the base (5) of the burrow (2) when the fish is violent or when the fish hook (A) is to be removed from the fish, the entire base (5) Is integrated with the hook main body (1) and there is no sharp notch or fine crack on the back (6) of the burrs (2), and the burrs (2) are broken from the base (5). Nothing to do. Also, since the angle of the back (6) is large as described above, even if the hook (A) pierces the clothes while operating the rod, the burrs (2) should be easily removed without getting tangled with the clothes fibers. Can be done.

The fishing hook (A) according to the fifth aspect is further limited to a straight line (L1) connecting the hook-side starting end (3) of the burrs (2) and the tip (4) of the burrs (2). ) And a straight line (L2) connecting the back side base end (5) of the burrs (2) and the tip (4) of the burrs (2) are 45 ° to 90 °, And a straight line connecting the rear end (5) of the burrs (2) and the tip (4) of the burrs (2).
The angle between (L2) and the surface (L3) of the hook body (1) located on the opposite side from the back (6) of the burr (2) to the needle tip (12).
(α) is a right angle or an obtuse angle ”.

According to the fifth aspect, in addition to the function of the fourth aspect, the angle (θ) between the straight line (L1) and the straight line (L2) is 45 °.
Since it does not have a sharp tip (4 ') burr (2') like the conventional hook (A ') shown in FIG. 24, when removing the hook (A) from the fish, ) Makes it easy to slide on the surface of the fish meat into which the tip (4) is inserted, and it is easy to remove the hook (A) from the fish.

[0015] The fishing hook (A) according to the sixth aspect is a "hook tip portion".
In the section perpendicular to the longitudinal direction of (11), the contour of the shaved surface (21) and / or (22) is formed by a curve having a center point outside the contour. As a result, as shown in FIG. 12, the upper and lower sides (14, 15) of which the so-called No. 2 sash has been made have smaller contact portions with the oral cavity surface and meat, so that the ridge (18) (19) (20)
As a result, the effect of cutting the surface of the mouth and the meat of the fish is increased, and at the same time, the contact portion with the surface of the mouth and the meat becomes smaller than when the upper and lower sides (14, 15) are flat, and the insertion resistance is reduced.

A seventh aspect of the present invention relates to a method for manufacturing a fishing hook (A) according to the first embodiment of the present invention, in which "the upper edge of the fishing hook body (1) on the needle tip (12) side is pressed to form a thin plate-shaped burrs. The protruding portion (2a) is projected from the upper side in an arc shape, and then the portion of the protruding portion for forming burrs (2a) opposite to the needle tip (12) is cut to remove Of the fishing hook (2)
(A) The hook main body (1) is curved and formed so as to face the direction of the shaft (10).

According to this method, since the burrs (2) are formed by pressing, a fishing hook (A) having burrs (2) having excellent strength can be mass-produced, and the processing method is press. So, of course, materials like conventional high-speed steel,
It is possible to use a material that is extremely difficult to machine such as titanium, and by using a new material, it is possible to provide a fishing hook (A) having a new function.

An eighth aspect of the present invention is obtained by adding a "step of shaving the hook tip portion (11)" to the manufacturing method of the seventh aspect, wherein "one side of the hook tip (12) side of the hook tip body (1)" is provided. To cause the thin plate-shaped burrow forming protrusion (2a) to protrude in an arc shape from the one side, and then the burr formation protrusion (2a) with respect to the needle tip (12). The opposite part is cut with a press to form the back (6) of the burrs (2), and the upper side surfaces (14) of the needle tip part (11) from the needle tip (12) to the burrs (2) and At least one of the lower side surfaces (15) is shaved from the needle tip (12) to the burrs (2) to make the shaved surfaces (21) and (22) flat or concave curved surfaces and a shaved surface (21). A sharp ridge (18) (19) (20) is formed at the intersection of (22), and then the hook main body (1) is turned so that the burrs (2) face the inside of the hook (A). It is characterized in that it "curves".
In addition to the action of (1), the sharp ridges (18) (19) (2
0) can be formed, and the fish hook (A) can be more sharply aligned with the fish.

According to a ninth aspect of the present invention, there is provided a method for manufacturing a fishing hook according to the seventh aspect, wherein the tip (11) of the hook main body (1) is pressed to make the tip (11) into a thin plate shape. Then, at least one of the upper side surface (14) and the lower side surface (15) of the thin plate-shaped needle tip (11a) is scraped off to form a sharp needle tip (12) and a needle tip (11). A ridge (2) is formed on the upper surface of the shaving surface (21) (22), and the shaved surface (21) (22) is formed as a flat surface or a concave curved surface. 19) (2
0) and cut the part of the burrs (2) opposite to the needle tip (12) to form the back (6) of the burrs (2).
(2) is to form the hook main body (1) so as to be curved so as to face the hood (10) side of the hook (A).

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS There are first to fifth embodiments (A1) to (A5) of a fishing hook (A) according to the present invention, which will be sequentially described with reference to the drawings. In the description of the present invention, the first embodiment (A1) is a representative example, and in the second embodiments (A2), (A3)..., Common parts are omitted to avoid complexity, and only different parts will be described. Shall be. Common parts are denoted by common reference numerals in all drawings.

As shown in FIG. 1, the fishhook (A1) of the first embodiment has a fin-shaped shark (2) of a shark at the tip (11) of the fishhook body (1). Furthermore, from needle point (12) to burrs (2)
The upper side surface (14) and the lower side surface (15) of the needle tip (11) are shaved from the needle tip (12) to the burrs (2), and the side of the needle tip (11) is shaved. The sharpened ridges (18), (19), and (20) are formed at the portions where the scraping surfaces (21) and (22) are in contact with each other, and the needle tip (12) is also formed. It will be formed sharply. In this case, as shown in FIGS. 2 and 12, the ridge on the burrs 18 and the ridge on the bottom
(20) is formed at an acute angle, and the ridge (19) of the side surface is formed at an obtuse angle, and the overall shape thereof is a rectangular shape similar to a rhombus in a longitudinal cross-sectional shape in the longitudinal direction of the needle tip (11). Of course, the present invention is not limited to this, and as shown in FIG. 11, all the corners forming the ridges (18), (19), and (20) may be formed at right angles (the cross-sectional shape is a square).

The material of the fishing hook (A1) may be such as conventionally used high speed steel, high carbon steel or titanium, and the material is not particularly limited. Grinding, cutting, or any other appropriate method is employed as a method of processing the upper and lower side surfaces (14, 15).

The shape of the burrs (2) will be described in detail. The basic shape is a straight line (L1) connecting the needle-tip-side starting end (3) of the burrs (2) and the tip (4) of the burrs (2). And the rear end of the burrow (2)
The angle (θ) formed by the straight line (L2) connecting the tip (4) of the burrs (2) and (5) is formed to be 45 ° to 90 °.
Also, the back end (5) of the burrs (2) and the tip of the burrs (2)
From the straight line (L2) connecting to (4) and the back (6) of the burrs (2)
The surface (L) of the hook body (1) located on the opposite side to (12)
The angle (α) with 3) is formed to be a right angle or an obtuse angle. Therefore, the burrow ridge (8) between the tip end side (3) of the burrs (2) and the tip (4) of the burrs (2) rises at a shallow angle with respect to the hook main body (1). And burrs (2)
The rear surface (6) between the rear-side base end portion (5) and the distal end portion (4) of the burrs (2) rises at a large angle with respect to the hook main body (1).

Next, a fishing hook according to a first embodiment of the present invention.
The manufacturing method (A1) will be described. There are various methods for producing the fishing hook (A) in addition to the first method described below.
Here, the first method is a representative example, and the same parts as those of the first method are omitted for simplification in the second and subsequent methods, and only different points will be described. A wire for a fishing hook is cut to a predetermined length, and the hook tip (11) is ground and sharpened. At this point, the cross section of the needle tip is circular. Next, the hook body (1)
Is pressed by a press (P3) indicated by a virtual line to form a thyme (7). Either polishing of the needle tip portion (11) or pressing of the thymoto (7) may be performed first. (FIG. 13)

Thereafter, the straight fishing hook main body (1) is fixed except for the tip portion (11), and a part of the upper side of the tip portion (11) is pressed with a press (P1). The thin plate-shaped bulge-forming projection (2a) is projected in an arc shape. (FIG. 14)

Subsequently, the back of the bulge-forming projection (2a) is cut by a press (P2), and the back (6) side of the burr (2) is formed into a concave curved shape. Of course, if the cutting blade of the press (P2) is made rectangular, the back (6) of the burrs (2) becomes straight. (FIG. 15)

Next, shaving surfaces (21) and (22) are to be formed on the tip (11) of the hook body (1). A disk-shaped cutter (23) or a grindstone is ) Side to the needle tip (12) and move it diagonally to the upper side (14) of the needle tip (11).
Scrape off. Although not shown, the lower side surface (1
When removing 5), the same method is used. (Figure 1
6)

The shaving of the needle tip (11) is performed on both upper side surfaces (1).
4) only, lower both sides (15) only or upper and lower sides (14) (15)
Apply to The scraping surface (21) (2
Sharp blade-shaped ridges (18), (19) and (20) are formed at the intersection of (2). There are two types of shaving: cutting and grinding. In the case of cutting, the sharpness of the needle tip (12) can be made higher than that of polishing.

[0029] Finally, although carried out in the grooved rollers molding linear fishhook body (1) and (24) and the slotted guide (25), grooved rollers (24 along the slotted guide (25) ) To bend the needle tip (11), and the needle tip (12)
Orientation, so that the burrs (2) face the hood (10)
To (FIG. 17) When the processing of the fishing hook (A1) is completed as described above, a required surface treatment such as plating is performed to complete the fishing hook (A1) of the first embodiment.

Next, a method of using the fishing hook (A1) of the present invention will be described. At the same time as the fish bites the bait, quickly operate the rod to align the hook (A1) with the fish. At this time, hooks (A
The needle point (12) of 1) is caught in the hard oral cavity of the fish and breaks through the surface at the same time, and then the needle point portion (11) tries to bite into the meat. It is mainly the ridge on the burrs (18) and the ridges (19) and (20) on the side and bottom surfaces that come into contact with the fish oral surface and meat, not the entire outer peripheral surface of the needle tip (11). . In other words, the sharp edge-shaped ridges (18), (19), (20) of the needle tip (11) mainly come into contact with the mouth surface and the meat of the fish and cut through the mouth surface and the meat of the fish. As a result, the entire circumference of the needle tip (11) comes into contact, and the contact resistance is significantly smaller than that of a conventional circular hook (A ') (A'') with a circular cross section that pushes out the mouth surface and meat.
It is easy to pierce. Therefore, matching with fish can be performed more easily.

<< Experimental Example >> The hook (A1) of the present invention shown in FIG.
Experimental data comparing the ease of insertion with the conventional hook (A ′) shown in FIG. 24 and FIG. The fishing hooks (A1) and (A ') used in this experiment are large ones made to facilitate the experiment, and (A1) is similar to the fishing hook shown in FIG. 3 of the first embodiment of the present invention. (A ') is a conventional example (Fig. 2
It is similar to 4). The fishing hook (A1) has a linear length from the hook tip (12) to the tip (4) of the burr (2) of 40 mm, and has a diamond-shaped cross section with the second watermark. In the case of the conventional product (A '), the tip of a round bar with a diameter of 6.5 mm is
It is sharpened conically at a length of mm. The material used is a 1.85 mm thick vinyl sheet having properties similar to fish. 26A and 26B, the horizontal axis represents the load kgf applied to the hooks (A1) and (A '), and the vertical axis represents the insertion depth of the hooks (A1) and (A'). According to this, the conventional hook (A ') is shown in FIG.
As shown in (b), although the hook (12 ') of the hook (A') comes in contact with the vinyl sheet and is inserted 10 mm, it is 3.12 kgf.
And a load of 4.95 kgf was required to be inserted to the next 20 mm, and a load of 6.30 kgf was required to be inserted to the last 30 mm. On the other hand, as shown in FIG. 26 (a), the hook (A) of the present invention is 10 seconds after the tip (12) of the hook (A) comes into contact with the vinyl sheet.
It requires a load of 1.88 kgf to be inserted into the next 20 mm, a load of 2.18 kgf to be inserted into the next 20 mm, and 3.39 k to be inserted into the last 30 mm.
A gf load was required. Thus, the fishing hook of the present invention
According to the shape of the needle tip portion (11) of (A1), at the point of 10 mm, the same depth reaches the same depth with a load of 60%, and 20 m
44% is sufficient at point m, 53% at point 30mm
Is enough. In FIG. 26 (c), the difference in the insertion depth when the load is 3 kgf is compared. In contrast, the product (A1) of the present invention reaches 26.5 mm, whereas the conventional product (A ′) has a difference of 26.5 mm. It was only 9.5 mm. As can be seen from this result, in the fishing hook (A1) of the present invention, the sharp tip (18), (19), and (20) are sharply cut from the point where the tip (12) is slightly inserted, due to the cutting effect of the sharp tip (12). ) Is inserted.

The shaved surfaces (21) and (22) forming the side surfaces of the needle tip (11) are replaced with concave concave columnar curved surfaces parallel to the longitudinal direction of the needle tip (11) as shown in FIG. If the needle tip (1
The outline of the longitudinal cross-sectional shape with respect to the longitudinal direction of 1) is a curve having a center point outside the outline, and in a so-called second watermark state, a substantially rhombic rectangular cross section is formed. ) (19)
The cutting edge portion of (20) will be more sharply formed, and this will increase the effect of cutting the mouth surface and meat of the fish body, and at the same time, the concave curved cutting surface (21) (22) against the mouth surface and meat The contact portion is small, and the resistance at the time of insertion is smaller than that of a straight line as shown in FIG. FIGS. 3 and 4 show a modification of the first embodiment (A1), in which the needle tip (11) is cut off by cutting, and further bent to the burrs (2) to be bent into a crescent shape. It is an example. In this case, the needle tip portion (11) is more easily inserted along the arc while cutting the meat of the fish body.

The hook (A2) of the second embodiment is formed by the first method, and as shown in FIG. 5, a hook (11) extending from the hook (12) to the burrs (2). The upper sides (14) of
Sharpen from the needle tip (12) to the burrs (2) and remove the needle tip (1
The cross section of the upper shaved surface (21) of (1) is formed so as to have a substantially inverted V-shaped cross section, so that the lower side surface (15) from the needle point (12) to the burrs (2) and the bottom surface The portion up to (16) remains arc-shaped in cross section. Also in this case, the burrs 18 on the burrs are sharpened like blades. Further, in this case, although the resistance at the time of insertion becomes larger due to the presence of the arcuate section in comparison with the first embodiment (A1) and its modification (FIG. 3), the burrs (2) side The sharp edge of the burrs on the side of the burrs (18) comes into contact with the mouth surface and the meat of the fish and cuts them off. Less. Of course, the shaved surface (2
1) may be formed on a concave columnar curved surface.

As shown in FIG. 6, the fishing hook (A3) of the third embodiment has both lower side surfaces (15) cut off and the intersection of the lower cutting surface (22) of the needle tip portion (11) is substantially reverse in cross section. In this case, the burrs are formed from the needle point (12).
The portion from the upper side surface (14) to the upper surface (17) up to (2) remains an arc-shaped cross section. In this case as well, the second embodiment (A
As in 2), the insertion resistance increases due to the presence of the arc-shaped section, but the sharp edge-shaped bottom ridge (20) exists on the bottom side, so that it can be inserted as compared to the conventional example. Time resistance is reduced. Of course, also in this case, the scraping surface (21) may be formed as a concave columnar curved surface.

7 to 10 show examples formed by the second and third methods of the present invention. In the second method, as shown in FIGS. 18 (a) to 18 (e), one end of a raw material (S) of a round bar cut to a certain size is pressed to form a needle tip portion (11) in a thin plate shape (in other words, If it is a spatula)
And then the upper side surfaces of the thin plate needle tip (11a)
This is a method in which at least one of (14) and both lower side surfaces (15) is cut off obliquely to form sharp needle tips (12) and burrs (2) on the upper surface of the needle tip portion (11). This cut surface (21)
(22) is configured as a flat surface or concave curved surface as described above, the intersection of this shaved surface (21) (22) is a sharp ridge (18) (19)
Form (20). Next, the part of the burrs (2) opposite to the needle tip (12) is cut to form the back (6) of the burrs (2),
The hook main body (1) is formed so as to be curved so that the burrs (2) face the direction of the fishing rod (10) of the hook (A). In addition, Chimoto (7)
Are formed in the same manner as in the first embodiment.

As a modified example, as shown in FIGS. 19 (a) to 19 (e), when pressing the needle tip portion (11a), the bottom (16) side of the needle tip portion (11a) is molded by a mold. (The mold portion is indicated by hatching.) So that the pressed meat overflows on the upper surface (17) side. Subsequently, the thin plate-shaped needle tip (11a) is scraped diagonally downward from the upper surface (17) side of the thin plate-shaped needle tip (11a) toward the bottom of the tip, and the sharp needle tip (12) and the burrs (2) are removed. To form Finally, the back of the burrow (2) is scraped to form the back (6) of the burr (2).

As shown in FIGS. 20 (a) to 20 (e), the third method of the present invention is a method of cutting a rod material (1) cut to a certain size and polished into a conical tip. Press the connecting part between the cylindrical part and the cylindrical part to protect the bulging part (2a) on both sides of the material (1) (or the upper surface (17)
Side only) and then the upper sides of the needle tip (11)
(14) or one or both of the lower side surfaces (15), or as a first modified example, as shown in FIGS. 21 (a) to 21 (e), the conical portion of the needle tip portion (11). In some cases, the whole is pressed, or as a second modified example (FIGS. 22A to 22E), the whole is pressed while guarding the bottom (16) side of the conical portion with a mold. The hook was formed in this way
(A4) to (A6). In this case, there is no step between the base (5) of the burrs (2) and the hook main body (1) due to pressing as in the first to third embodiments.

According to the fourth method of the present invention, as shown in FIGS. 23 (a) to 23 (d), the tip of a round bar material (1) cut to a certain size and polished at the tip is conical. The part (11) is cut and raised with a knife (not shown) to form a protrusion for forming burrs (2a), and the part from the tip to the base is scraped off with a cutter, and the curved back surface of the burrs (2) ( Forming 6) and removing fine cracks at the base of the burrow forming protrusion (2a) generated at the time of cutting and raising, followed by scraping off the side surface of the needle tip (11), sharp needle tip (12) and ridge (18), (19) and (20) are examples. In this case as well, burrs (2) having the same shape as in the case of press molding are obtained.

[0039]

According to the fishing hook of the present invention, since the sharp edge of the sharpened tip formed by cutting off the tip of the hook reduces the insertion resistance to the fish, even an unskilled person can easily attach the fishing hook to the fish. There is an advantage that they can be combined. further,
By making the shaved surface of the needle tip portion a "second watermark" and having a concavely curved surface, the contact resistance of fish meat at the time of piercing is reduced, so that it is easier to pierce and the alignment is easier. Further, since the shape of the burrs is a special shape, the burrs are not easily broken, and even a beginner can easily remove the fishing hook without seriously damaging the fish. Also, even if the hook hooks into the clothes, the burrs can be easily removed without getting entangled in the fibers of the clothes. Further, according to the method of the present invention, since burrs are formed by pressing, any material can be used.

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment of a fishing hook according to the present invention.

FIG. 2 is an enlarged perspective view of a hook portion of the fishing hook according to the first embodiment of the present invention.

FIG. 3 is an enlarged partial cross-sectional front view of another example of the tip of the fishing hook of the first embodiment according to the present invention.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is an enlarged perspective view of a hook portion of a fishing hook according to a second embodiment of the present invention.

FIG. 6 is an enlarged perspective view of a hook portion of a fishing hook according to a third embodiment of the present invention.

FIG. 7 is an enlarged perspective view of a hook portion according to a fourth embodiment of the present invention using a fishing hook formed by the second or third method.

FIG. 8 is an enlarged perspective view of a hook portion according to a fifth embodiment of the present invention using a fishing hook formed by the second or third method.

FIG. 9 is an enlarged perspective view of a hook portion according to a sixth embodiment of the present invention using a hook formed by the second or third method.

FIG. 10 is an enlarged perspective view of a tip part of a modification of the fishing hook according to the fourth to sixth embodiments.

FIG. 11 is a cross-sectional view of a hook portion of the fishing hook of the first embodiment according to the present invention.

FIG. 12 is a cross-sectional view of the fishing hook according to the first embodiment of the present invention in which a No. 2 squash is provided at the tip of the hook;

FIG. 13 is a front view showing a state in which the tip of the raw material for a fishing hook is polished and the other end is pressed to form a thyme in the first method of the present invention.

FIG. 14 is a front view showing a state in which one side of the needle tip shown in FIG. 13 is pressed to form a projection for forming burrs.

FIG. 15 is a front view showing a state in which the back of the burrow in FIG. 14 is trimmed by pressing.

FIG. 16 is a front view of the case where the needle tip of FIG. 15 is cut off;

17 is a front view showing a state where the fishing hook main body of FIG. 17 is bent.

FIG. 18 is a flowchart of a manufacturing process of a needle tip portion according to the second method of the present invention.

FIG. 19 is a flowchart of another manufacturing process of the needle tip portion of the second method of the present invention.

FIG. 20 is a flowchart of a manufacturing process of a needle tip portion according to the third method of the present invention.

FIG. 21 is a flowchart of a modified example of the manufacturing process of the needle tip portion according to the third method of the present invention.

FIG. 22 is a flowchart of still another modified example of the manufacturing process of the needle tip portion of the third method of the present invention.

FIG. 23 is a flowchart of a process of manufacturing a needle tip portion according to a fourth method of the present invention.

FIG. 24 is a front view of a conventional example.

FIG. 25 is a front view of another example of the conventional example.

FIG. 26 is a graph showing the results of an insertion experiment between the first embodiment of the present invention and a conventional hook.

[Explanation of symbols]

 (A)… Fishing hook (1)… Fishing hook body (2)… Frog (3)… Front tip end (4)… Frog tip (5)… Front back base (6)… Back (7) ... Chimoto (9) ... Shaft (10) ... Rotary roller (11) ... Needle tip (12) ... Needle tip (14) ... Upper both sides (15) ... Lower both sides (18) (19) ( 20)… Sharp edge like ridge (21) (22)… Shaved surface

Continuation of the front page (56) References JP-A-2-42927 (JP, A) JP-A-1-155359 (JP, U) JP-A-3-112255 (JP, U) JP-A-58-146461 (JP) , U) Japanese Utility Model Application Hei 4-82959 (JP, U) Japanese Utility Model Application Hei 1-77368 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01K 83/00-83/06

Claims (9)

(57) [Claims] 1. An upper side surface and a lower side surface of a needle tip portion from a needle point to a burr are shaved off to form a shaving surface on the upper side surface portion and the lower side surface portion, and the shaving surface is formed. A fishing hook characterized in that a sharp edge-shaped ridge is formed at a portion where surfaces are in contact with each other. 2. An upper side surface of a tip portion from a needle point to a burr is shaved off to form a shaved surface at the upper side surface portion, and a sharp edge is formed at a portion where the shaved surfaces are in contact with each other. A fishing hook characterized in that a ridge portion is formed, and a portion from the lower side surface to the bottom surface from the hook tip to the burrs is formed in an arc-shaped cross section. 3. The lower side surfaces of the needle tip portion from the needle tip to the burrs are shaved off to form shaved surfaces at the lower side surfaces, and a sharp edge is formed at a portion where the shaved surfaces contact each other. A fishing hook characterized in that a ridge portion is formed, and a portion from an upper side surface to an upper surface from a hook tip to a burrow is formed in an arc-shaped cross section. 4. A straight line (L2) connecting the rear end of the burr to the tip of the burr and a surface (L3) of the fishing hook main body located on the opposite side of the burr from the back to the needle tip. The hook according to any one of claims 1 to 3, wherein the angle (α) is a right angle or an obtuse angle. 5. An angle formed by a straight line (L1) connecting the leading end of the burrs to the leading end of the burrs and a straight line (L2) connecting the rear base of the burrs to the leading ends of the burrs. θ) is 45
° to 90 °, and a straight line (L2) connecting the back side base end of the burr and the tip of the burr, and the surface (L3) of the fishing hook body located on the opposite side to the needle tip from the back of the burr. The fishing hook according to any one of claims 1 to 3, wherein the angle (α) between the angle and the angle is from right angle to obtuse. 6. The cross section of the needle tip portion in a direction perpendicular to the longitudinal direction, wherein the contour of the shaved surface is formed by a curve having a center point outside the contour. The fishing hook according to any one of items 1 to 5, wherein 7. A thin plate-shaped burrow-forming protruding portion is pressed out from the upper side by pressing an upper side portion of the hook tip side of the fishing hook main body. A method for manufacturing a fishing hook, characterized in that a portion on the opposite side of the fishing hook is cut to form a back surface of the fishing hook, and the fishing hook main body is formed so as to be curved in such a manner that the flash faces the direction of the fishing hook. 8. The thin hook-shaped bulge-forming projection is pressed from the upper side of the fishing hook main body by pressing the upper side of the tip of the fishing hook main body. The opposite side is cut to form the back surface of the burrs, and at least one of the upper side surface and the lower side surfaces of the needle tip portion from the needle tip to the burrs is shaved off from the needle tip to the burrs. The shaving surface is a flat surface or a concave curved surface, and a sharp ridge is formed at the intersection of the shaving flat surface or the concave curved surface, and thereafter, the fishing hook body is curved so that the burrs face the direction of the fishing hook. A method of manufacturing a fishing hook, characterized by forming. 9. A tip portion of a fishing hook body is pressed to form the tip portion in a thin plate shape, and subsequently, at least one of both upper and lower side surfaces of the thin plate tip portion is scraped off. Forming sharp edges on the upper part of the sharp needle tip and the needle tip part and forming a sharp ridge at the intersection of the shaving surface as the flat surface or concave curved surface,
A method for manufacturing a fishing hook, characterized in that a portion of the hook on the opposite side of the hook is cut to form a back surface of the hook, and the hook is curved so that the hook faces the direction of the fishing hook.