JP3502662B2 - Method for producing hooks for fishing hooks - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved method for producing a burr of a fishing hook, and more particularly to a method of producing a burr called a hansle which is most suitable for mass production. 2. Description of the Related Art A conventional method of manufacturing a barb (62) of a fishing hook (B) is to set a hook tip portion of a fishing hook body (61) on a base (51) as shown in FIG. The hook body (6
After fixing the needle point of 1), move a burr forming jig (53) such as a `` plane '' having a sharp cutting edge toward the needle point of the fishing hook body (61), and move the fishing hook body (61). The surface is cut off to form a burr (62). Kaeri (6
2) is formed by cutting and raising the burr forming jig (53) at an angle cut into the fishing hook body (61), and as shown in FIG. 10, a sharp cutting and raising piece is formed from the fishing hook body (61). It has become. The burrs (62) are mainly used to prevent the bait from falling off the hook (B), but to dig into the fish meat together with the needle when the fish is hooked, and to prevent the hook from coming off the fish. It also works. Therefore, when the caught fish rampages, a large moment is applied to the base of the burr (62). A barb (62) made by a conventional method is formed by cutting and raising the surface of the hook tip of a fishing hook body (61), and is formed between the fishing hook body (61) and the barb (62). Kerf
A sharp notch is formed at the groove bottom of (63), and the burr (62)
When a large moment is applied, stress concentration occurs in this portion, and the burr (62) breaks from the base, so that there is a problem that the fish may escape. Also, as can be seen from FIG.
Because the tip of the frog (62) is sharp and sharp,
When the hook of the fishing hook (B) pierces the clothes or the like during handling, it is difficult to remove the hook, and there is a problem in that the handling of the hook with the cut-and-raised piece type burr is difficult. [0004] An object of the present invention is that a burr formed on the tip of a fishing hook is very strong and does not break even if a large moment is applied.
Another object of the present invention is to make it easy to remove even if it pierces clothes or the like. [0005] In the method of manufacturing a burr of a hook (A) according to the present invention, a method is described in which a sharpened tip portion of a hook body (1) is placed on a base (10). After pressing and fixing with a pressure fixing jig (11), the burr forming jig (15) is
Move the fishhook body (1) from the rear side (3) to the hook tip (4) toward the pressing fixture (11) along the hookhook body (1).
In the method for producing a burr (2) of a fishing hook (A) forming a burr (2) at a tip portion of (1), the burr is formed on a pressing and fixing surface (14) of a pressing and fixing jig (11), and an opening thereof is formed. A substantially inverted V-shaped burring groove having a width gradually narrowing from the width toward the groove ceiling and having an opening at the end of the pressing fixture (11).
At (13), the sharp tip of the fishing hook body (1) is pressed and fixed, and the burring forming jig (15) with the cutting edge (16) cut off is pressed and fixed along the fishing hook body (1) ( 11) Groove forming groove
(13) The fishing hook main body (1) having the rear end side (17) moved toward the opening and plastically deformed by the cutting edge (16).
The flesh of the surface portion is pushed into the burr-forming groove (13) to form a burr (2) at the tip of the fishing hook (A). " As a result, the flesh of the surface of the fishing hook body (1) is plastically deformed by the cutting edge (16) and is pushed into the burr forming groove (13), and the fishing hook (A) is formed in a cold forging manner. )
A burr (2) is formed at the tip of. The burr (2) formed in this way is determined by the shape of the cutting edge (16) and the burr forming groove (13). In particular, the burr forming jig (15) [for example, a planer The cutting edge is not sharp as in the past.
(16) between the rear end face of the barb (2) formed and the hook body (1), there is no cut groove (63) having a sharp notch as in the conventional example, and the rear end face The angle between the arc-shaped or rear end face and the hook main body (1) becomes obtuse. As a result, even if a large moment is applied to the burr (2), there is no possibility that the burr (2) will be broken, and even if the needle tip (4) pierces the clothes, the burr (2) will not interfere much. The hook (A) is easy to handle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. The material of the material used for the hook (A) is high carbon steel,
High-speed steel, piano wire and other very hard metal wires are used. A metal wire is cut into a predetermined length, and one end thereof is sharply formed by polishing. Subsequently, the other end is pressed to form a base (3). The linear fishing hook main body (1) thus formed is set on a base (10), and the tip (4) of the fishing hook main body (1) is pressed and fixed by a pressing fixing jig (11). In this case, the base (3) is held parallel to the base (10). The pressing fixing surface (14) of the pressing fixing jig (11) is formed with a pressing groove (12) for pressing the tip (4) of the fishing hook body (1). A burr forming groove (13) is formed in the ceiling surface of ()). As can be seen from FIG. 2, the cross-section parallel to the hook main body (1) has a substantially triangular shape.
As can be seen from FIG. 4, the cross section perpendicular to (1) is an inverted V-shaped cross section composed of two tangent lines pressing the hook main body (1). Also, the burrs forming groove (13),
In the vicinity of the rear end surface (17) of the pressing fixture (11),
It is formed so as to open at the end face (17) on the side of the leg. Of course, the shape of the burr forming groove (13) is not limited to the case where the planar shape is substantially triangular as described above, and the ridge (18) of the burr (2) draws an arc. The cross-sectional shape parallel to the hook main body (1) may be, for example, a shaver-like shape, or any other appropriate shape. (15) is a burr-forming jig such as a plane, for example, and its tip (that is, the cutting edge portion) can be formed in a trapezoidal shape (of course, not limited to a trapezoidal shape; Of course, it is possible to cut off) and move toward the burr forming groove (13). If the edge of the burr forming jig (15) is formed in a trapezoidal shape, the rear end face of the formed burr (2) will be straight, and if it is formed in a concave / convex arc shape, It will be formed in an arc shape. In addition, the fishing hook body (1) of the burrs forming concave groove (13)
The shape of the cross section perpendicular to the groove is not limited to the inverted V-shape as shown in FIG. 4, but may be formed so that the groove width becomes thinner in the middle as shown in FIG. Thus, the burr forming jig (15) is moved toward the burr forming groove (13) along the fishing hook body (1), and the burr forming jig (15) is moved from just before the burr forming groove (13). As shown in FIG. 3, the meat on the surface of the fishing hook body (1) is plastically deformed and moved with a burr forming jig (15) as shown in FIG. 3, and cooled into the burr forming groove (13). Press in the manner of forging. As a result, the flesh on the surface of the fishing hook body (1) is filled in the burr forming groove (13), and the burr (2) is formed by plastic deformation. The burrs (2) formed in this way are relatively small (so-called hansle) as shown in FIG.
It is also possible to adopt the shape of (2). ) Moreover, since it is formed in the manner of cold forging, the burr (2) is reinforced metallically by, for example, refining the crystal grains. Also, the shape of the burr (2) is not a conventional cut-and-raised piece type, but a special one.
As shown in FIG. 8, the rear end face of the barb (2) is inclined by (θ) toward the needle tip (4) with respect to a line perpendicular to the fishing hook body (1) (in other words, it is formed at an obtuse angle). ), And the shape is such that a moment is not easily applied to the burr (2). Further, as shown in FIG. 8, a locking projection (5) is formed at the tip of the burr (2), and an angle of (α) is provided between the burr and the rear end surface of the burr (2). Good. Due to the presence of the locking projection (5), the burr (2)
It functions to prevent the engaging portion of the bait or fish engaged with the rim from dropping off from the burr (2). In this way the hook body
When the burr (2) is formed at the tip of (1), the burr forming jig (15) is returned to the form position, and the pressing and fixing jig (11)
Is lifted to remove the hook main body (1), and thereafter, the hook main body (1) is bent by another device to form a hook shape as shown in FIG. Finally, after a heat treatment such as quenching and tempering is performed, a surface treatment such as a plating treatment is performed to obtain a fishing hook (A). According to the method of the present invention, a substantially inverted V-shaped burr formed on a press-fixing surface of a press-fixing jig by pressing and fixing a tip portion of a fishing hook body and using a burr-forming jig having a cutting edge. Since the burr is formed at the tip of the hook by pushing the meat of the surface portion of the hook into the forming groove, the burr formed at the tip of the hook is formed in a so-called cold forging manner. It is very strong and does not break even when a large moment is applied.The formed rear end face of the flap is formed at an obtuse angle with respect to the fishing hook body, and the pointed portion is sharply pointed. It is easy to remove even if it pierces clothes or the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a fishing hook according to the present invention; FIG. 2 is a front sectional view before forming a burr in the method of the present invention; FIG. 3 is a front sectional view after forming a burr in the method of the present invention; FIG. 4 is a perspective view of a pressing and fixing jig used in the method of the present invention when the needle tip is fixed according to the first embodiment. FIG. 5 is a needle tip of a pressing and fixing jig used in the method of the present invention according to a second embodiment. FIG. 6 is an enlarged perspective view of a hook portion after a burr is formed in the method of the present invention. FIG. 7 is a front view of the hook tip of the first embodiment of the fishing hook according to the present invention. FIG. FIG. 9 is a front view of the tip of the fishing hook according to the second embodiment of the present invention. FIG. 9 is a front sectional view showing a burr forming state in the conventional example. FIG. 10 is a perspective view of the tip of the conventional example. FIG. Front view [Explanation of symbols] (A)… Fishing hook (1)… Fishing hook body (2)… Kauri (3)… Chimoto (4)… Needle tip (10)… Base (11) … Press-fixing jig (14)… Press-fixing jig pressing-fixing surface (15)… Burr forming jig (16)… Burr-forming jig cutting edge (17)… Press-fixing jig base side end

Claims (1)

(57) [Claims 1] A tip portion of a sharply formed fishing hook main body is pressed and fixed on a base with a pressing fixing jig, and then a burr forming jig is moved along the fishing hook main body. In a method for manufacturing a burr of a hook, in which a burr is formed at a tip portion of the hook body, the burr is moved from the back side of the hook body toward the tip side toward the pressing fixture, and the burr is formed on a pressing fixed surface of the pressing fixture. The sharp tip of the fishing hook body is pressed by a substantially inverted V-shaped burring forming groove which is gradually narrowed from its opening width toward the groove ceiling and has an opening at the side of the bottom of the pressing fixture. The jig is fixed, and the burr forming jig with the cutting edge cut off is moved along the fishing hook main body toward the burr forming groove of the pressing fixing jig, and the surface portion of the fishing hook body plastically deformed by the cutting edge is cut off. Put the meat in the groove to form the burrs Forming a burr at the tip of the hook by pushing the burr into the burr.