JP3120834U - Fishhook - Google Patents

Abstract

【課題】良好な強度を十分に確保することができると共に、２次元のプレス加工により製造が可能な釣針の提供を課題とする。
【解決手段】針軸体１０先端に針先部１１を、基端にチモト部１２を、また前記針先部１１に続く途中に湾曲部１３を設けた釣針１であって、針軸体１０の軸線Ｚに対し該軸線Ｚが属する面とは直角な方向をＸ方向とし、一方、針軸体１０の軸線Ｚに対し該軸線Ｚが属する面上で直角な方向をＹ方向とした場合において、針軸体１０は、少なくとも前記針先部１１とチモト部１２を除く領域における断面形状を、全体としてＹ方向を長軸Ｙ、Ｘ方向を短軸Ｘとした概略楕円形状に構成すると共に、前記略楕円形状のうち前記長軸Ｙと短軸Ｘの中間に位置する各４領域を、プレス加工による平打ち加工面Ｍとして、４つの対称な傾斜直線部ｍに構成してある。
【選択図】 図１An object of the present invention is to provide a fishing hook that can sufficiently ensure good strength and can be manufactured by two-dimensional pressing.
A fishing rod (1) having a needle tip (11) at the distal end of a needle shaft (10), a tip (12) at the proximal end, and a curved portion (13) in the middle of the needle tip (11). When the direction perpendicular to the surface to which the axis Z belongs is defined as the X direction, and the direction perpendicular to the axis Z of the needle shaft 10 on the surface to which the axis Z belongs is defined as the Y direction. The needle shaft body 10 has a cross-sectional shape at least in a region excluding the needle tip portion 11 and the chimoto portion 12 as a generally elliptical shape with the Y direction as the major axis Y and the X direction as the minor axis X as a whole, Each of the four regions located in the middle of the major axis Y and the minor axis X in the substantially elliptical shape is configured as four symmetrical inclined straight portions m as a flat punched surface M by press working.
[Selection] Figure 1

Description

本考案は釣針に関する。   The present invention relates to a fishhook.

従来の一般的な釣針の正面図とその左側面図を図５の（Ａ）、（Ｂ）に示し、そのＹ−Ｙ断面図を同じく図５の（Ｃ）に示す。従来の釣針の一般的な製造方法は、断面が円形（丸棒状）の金属線を用い、これを図面上で水平方向の左右からプレスによる平打ち加工を行うことで、横幅（Ｘ−Ｘ方向）を圧縮して平打ち平面ｈ、ｉとすると共に、平打ち加工がなされないフリーな垂直方向の縦幅（Ｙ−Ｙ方向）を増加させるようにしている。このような少し縦長の形状に加工することで、魚を釣り上げる際等において、釣針の湾曲を拡げる方向の引っ張り外力に対する強度を向上させることができる。その一方、横幅が縮小することで、釣針を側方に曲げる、ねじる等の外力に対して強度が低下する問題があり、全体としての釣針の十分な強度向上にはつながっていなかった。
また特開２００２−２２３６６８号公報には、釣針の湾曲部を構成する丸棒状の金属線を両側面と内外面を平面状にプレス加工することで、その部分の断面が略正方形になるように構成し、これによって釣針の強度を更に強化し、また掛かった魚を傷つけ難くしようとしたものが提供されている。
特開２００２−２２３６６８号公報 A front view and a left side view of a conventional general fishing hook are shown in FIGS. 5A and 5B, and a YY sectional view thereof is also shown in FIG. A conventional method for producing a conventional fishhook is to use a metal wire having a circular cross section (round bar shape), and by performing flattening by pressing from the left and right in the horizontal direction on the drawing, the horizontal width (XX direction) ) To be flattened planes h and i, and the vertical length (YY direction) in the free vertical direction where flattening is not performed is increased. By processing into such a slightly vertically long shape, the strength against a tensile external force in the direction of expanding the curvature of the fishhook can be improved when fishing a fish. On the other hand, there is a problem that the strength is lowered due to an external force such as bending or twisting the fishhook to the side by reducing the lateral width, and this has not led to a sufficient improvement in the strength of the fishhook as a whole.
Japanese Patent Laid-Open No. 2002-223668 discloses that a round bar-shaped metal wire constituting a curved portion of a fishhook is pressed into a flat shape on both side surfaces and inner and outer surfaces so that the cross section of the portion becomes substantially square. There has been provided an arrangement that seeks to further enhance the strength of the fishhook and make it difficult to damage hooked fish.
JP 2002-223668 A

ところが上記特許文献１に記載の釣針の場合には、断面が円形の金属線をプレス加工して強化するのに、湾曲部の両側面からのプレスと湾曲面の内外面からのプレス加工が必要となり、３次元のプレス加工、若しくは針の形状に成形する前にフトコロ部（内側面）を別にプレス加工する必要がある等の問題がある。従って金型の設置や作業が容易ではなくなり、製造コストが増大するという問題がある。また３次元のプレス加工を必要とすることから、湾曲した領域では略正方形の断面とすることができる範囲が短く限定され、釣針の広範な範囲にわたって、そのような形状には加工し難い問題がある。   However, in the case of the fishing hook described in Patent Document 1, it is necessary to press from both side surfaces of the curved portion and from the inner and outer surfaces of the curved surface to press and strengthen the metal wire having a circular cross section. Thus, there is a problem that it is necessary to press the Futokoro part (inside surface) separately before forming into a three-dimensional press process or a needle shape. Accordingly, there is a problem that the installation and operation of the mold is not easy and the manufacturing cost increases. In addition, since a three-dimensional press work is required, the range that can have a substantially square cross section is limited in a curved region, and there is a problem that it is difficult to process such a shape over a wide range of fishhooks. is there.

そこで本考案は上記従来の問題を解消し、良好な強度を十分に確保することができると共に、２次元のプレス加工により製造が可能な釣針の提供を課題とする。   Therefore, the present invention has an object to provide a fishing hook that can solve the above-mentioned conventional problems and can sufficiently secure a good strength and can be manufactured by two-dimensional press working.

上記課題を達成するため、本考案の釣針は、針軸体の先端に針先部を、基端にチモト部を、また前記針先部に続く途中に湾曲部を設けた釣針であって、針軸体の軸線に対し該軸線が属する面とは直角な方向をＸ方向とし、一方、針軸体の軸線に対し該軸線が属する面上で直角な方向をＹ方向とした場合において、針軸体は、少なくとも前記針先部とチモト部を除く領域における断面形状を、全体としてＹ方向を長軸Ｙ、Ｘ方向を短軸Ｘとした概略楕円形状に構成すると共に、前記略楕円形状のうち前記長軸Ｙと短軸Ｘの中間に位置する各４領域を、プレス加工による平打ち加工面として、４つの対称な傾斜直線部に構成してあることを第１の特徴としている。
また本考案の釣針は、上記第１の特徴に加えて、針軸体は、その断面形状のうちの平打ち加工面である４つの傾斜直線部を、短軸Ｘ上で連続させると共に、長軸Ｙには達することなくその手前の過半付近で終端する構成としてあることを第２の特徴としている。
また本考案の釣針は、上記第１の特徴に加えて、針軸体は、少なくとも針先部とチモト部を除く領域における断面形状が短軸Ｘ上において小さな円弧状凸部を構成するように、プレス加工によるリブが両側面中央に構成してあることを第３の特徴としている。 To achieve the above object, the fishhook of the present invention is a fishhook having a needle tip at the tip of the needle shaft, a chimoto at the base, and a curved portion in the middle of the needle tip, When the direction perpendicular to the axis to which the axis belongs is the X direction while the direction perpendicular to the axis to which the axis belongs is the Y direction, the needle The shaft body has a cross-sectional shape in a region excluding at least the needle tip portion and the chimoto portion as a whole in a substantially elliptic shape with the Y direction as the major axis Y and the X direction as the minor axis X, and the substantially elliptical shape. The first feature is that each of the four regions located in the middle of the major axis Y and the minor axis X is configured as four symmetrical inclined straight portions as a flat-worked surface by press working.
In addition to the first feature described above, the fishhook of the present invention has a needle shaft body that has four inclined straight portions, which are flat-finished surfaces of its cross-sectional shape, continuous on the short axis X, and is long. A second feature is that the axis Y is terminated in the vicinity of the majority before reaching the axis Y.
In addition to the first feature described above, the fishhook of the present invention is configured such that the needle shaft body forms a small arcuate convex portion on the short axis X with a cross-sectional shape at least in a region excluding the needle tip portion and the chimoto portion. The third feature is that a rib formed by pressing is formed at the center of both side surfaces.

請求項１に記載の釣針によれば、釣針は、針軸体の先端に針先部が設けられ、針軸体の基端にチモト部が設けられ、針軸体の針先部に続く途中に湾曲部が設けられてなる。そして少なくとも前記針先部とチモト部とを除く領域において、針軸体の断面はＹ方向を長軸Ｙ、Ｘ方向を短軸Ｘとした概略楕円形状に構成されている。即ち、針軸体の概略楕円形状の断面の長軸が釣針の内外方向に位置するようにして構成されることで、釣針の湾曲を拡げる方向への引っ張り外力、即ち主要な外力に対する釣針の強度を向上させることができる。一方、釣針のＸ方向、即ち釣針の両側方向への曲げ、ねじり等の外力に対しても、概略楕円形状の短軸方向の膨らみが対応するため、従来の一般の釣針よりも強度を向上させることができる。
また針軸体は、その概略楕円形状の断面の長軸と短軸との中間に位置する４領域をプレス加工による平打ち加工面として、４つの対称な傾斜直線部に構成されている。即ち、針軸体は、その内外方向と両側方向との中間にある４つの対称な方向から角度をもって平打ち加工されることで、針軸体がその周りの４方向から均等に且つ十分に鍛造される状態となって、２方向から鍛造される場合に比べてその組織がより緻密となって、全体の強度を向上させることができる。
更にプレス加工による傾斜直線部は、概略楕円形状の長軸と短軸の中間に位置せしめることで、プレス加工に必要な金型を前記長軸を分割面とした一対の金型で構成することが可能となり、該一対の金型で釣針の両側方から２次元のプレス加工をすることで、４方向からの平打ち加工による強度に優れた釣針を容易に製造することができる。また釣針の両側方からの２次元のプレス加工を行うだけでよいので、３次元のプレス加工では難しい湾曲部を含む広範囲の領域を、容易に強化加工することができる。 According to the fishhook of claim 1, the fishhook is provided with a needle tip portion at the tip of the needle shaft body, a chimoto portion is provided at the proximal end of the needle shaft body, and continues along the needle tip portion of the needle shaft body. Is provided with a curved portion. At least in the region excluding the needle tip portion and the chimoto portion, the cross section of the needle shaft body is formed in a substantially elliptic shape with the major axis Y in the Y direction and the minor axis X in the X direction. That is, by configuring the long axis of the substantially elliptical cross section of the needle shaft body to be located in the inner and outer directions of the fishhook, the tensile force in the direction of expanding the curve of the fishhook, that is, the strength of the fishhook with respect to the main external force Can be improved. On the other hand, since the bulge in the minor axis direction of the substantially elliptical shape corresponds to an external force such as bending or twisting of the fishhook in the X direction, that is, in both directions of the fishhook, the strength is improved over the conventional ordinary fishhook. be able to.
Further, the needle shaft body is constituted by four symmetrical inclined linear portions with four regions positioned in the middle between the major axis and the minor axis of the cross section of an approximately elliptical shape as a flat-worked surface by press working. That is, the needle shaft body is flattened at an angle from four symmetrical directions that are intermediate between the inner and outer directions and both side directions, so that the needle shaft body is uniformly and sufficiently forged from the surrounding four directions. In this state, the structure becomes denser than when forged from two directions, and the overall strength can be improved.
Further, the inclined straight line portion formed by pressing is positioned between the major axis and the minor axis of an approximately elliptical shape, so that the mold necessary for pressing is configured by a pair of molds having the major axis as a split surface. Thus, a two-dimensional press working from both sides of the fishhook with the pair of molds makes it possible to easily manufacture a fishhook having excellent strength by flattening from four directions. Further, since it is only necessary to perform two-dimensional pressing from both sides of the fishhook, it is possible to easily reinforce a wide area including a curved portion that is difficult to perform by three-dimensional pressing.

請求項２に記載の釣針によれば、上記請求項１に記載の構成による効果に加えて、その断面形状のうちの平打ち加工面である４つの傾斜直線部を、短軸Ｘ上で連続させると共に、長軸Ｙには達することなくその手前の過半付近で終端する構成としてあるので、断面幅の小さい短軸Ｘ側での強度を、短軸Ｘを頂点として、「く」の字状に切れ目なく連続するヒラ打ち加工面にて強化することができる。また長軸Ｙ付近では湾曲部を残すことで、プレス加工時における概略楕円形状への断面の塑性流動による変形を容易化することができる。   According to the second aspect of the fishing hook, in addition to the effect of the configuration according to the first aspect, four inclined straight portions that are flat-worked surfaces of the cross-sectional shape are continuously arranged on the short axis X. In addition, since it is configured to terminate in the vicinity of the majority before the major axis Y without reaching the major axis Y, the strength on the minor axis X side with a small cross-sectional width is indicated by the shape of "<" It can be strengthened with a continuous and continuous surface. Further, by leaving the curved portion in the vicinity of the long axis Y, it is possible to facilitate the deformation due to the plastic flow of the cross section into a substantially elliptical shape during the press working.

請求項３に記載の釣針によれば、上記請求項１に記載の構成による効果に加えて、針軸体は、少なくとも針先部とチモト部を除く領域における断面形状が短軸Ｘ上において小さな円弧状凸部を構成するように、プレス加工によるリブを両側面中央に構成してあるので、釣針を側方に曲げる、ねじる等の外力に対して強度を向上させることができると共に、釣針に外観形状的なアクセントをつけることができる。   According to the fishing hook of claim 3, in addition to the effect of the configuration of claim 1, the needle shaft body has a small cross-sectional shape on the minor axis X at least in the region excluding the needle tip portion and the chimoto portion. Since the ribs formed by pressing are formed in the center of both sides so as to form an arc-shaped convex part, the strength can be improved against external forces such as bending the fishhook sideways and twisting, and Appearance-like accents can be added.

以下に添付の図面を参照しながら本考案の実施形態を更に詳細に説明し、本考案の理解に供する。しかしながら以下の説明は本考案の具体例であって、実用新案登録請求の範囲に記載の内容を減縮するものではない。
図１は本考案の第１の実施形態に係る釣針の全体図で、（Ａ）は正面図、（Ｂ）は左側面図、（Ｃ）はＹ−Ｙ断面図（針軸体の軸線に対する垂直断面図）である。図２は本考案の第１の実施形態に係る釣針の製造に使用する金型の例を示す断面図、図３は本考案の第２の実施形態に係る釣針の軸線Ｚに対する垂直断面図、図４は本考案の第２の実施形態に係る釣針の製造に使用する金型の例を示す断面図である。 Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings so that the present invention can be understood. However, the following description is a specific example of the present invention, and does not reduce the contents described in the claims of the utility model registration.
1A and 1B are overall views of a fishing hook according to a first embodiment of the present invention. FIG. 1A is a front view, FIG. 1B is a left side view, and FIG. 1C is a YY sectional view (with respect to the axis of the needle shaft body). It is a vertical sectional view). 2 is a cross-sectional view showing an example of a mold used for manufacturing a fishhook according to the first embodiment of the present invention, FIG. 3 is a vertical cross-sectional view with respect to the axis Z of the fishhook according to the second embodiment of the present invention, FIG. 4 is a cross-sectional view showing an example of a mold used for manufacturing a fishhook according to the second embodiment of the present invention.

図１を参照して、本考案の釣針１は、針軸体１０の先端に針先部１１を、基端に糸を取り付けるためのチモト部１２を設けている。また前記針先部１１に続く針軸体１０の途中に湾曲部１３を設けている。釣針１の全体としての形状は、図１に示す形状に限定されることはなく、針先部１１、チモト部１２、湾曲部１３を有するものであれば種々の形状を含むものとする。   Referring to FIG. 1, a fishing hook 1 of the present invention is provided with a needle tip portion 11 at the distal end of a needle shaft body 10 and a chimoto portion 12 for attaching a thread to a proximal end. Further, a curved portion 13 is provided in the middle of the needle shaft body 10 following the needle tip portion 11. The shape of the entire fishhook 1 is not limited to the shape shown in FIG. 1, and includes various shapes as long as it has the needle tip portion 11, the chimoto portion 12, and the curved portion 13.

前記針軸体１０は、少なくとも針先部１１とチモト部１２を除く領域、その領域の全て若しくは針先部１１とその近傍及びチモト部１２とその近傍を除く領域の断面を図１の（Ｃ）の如く形成している。
即ち、針軸体１０の断面形状を概略楕円形状としている。この概略楕円形状は楕円形状及び楕円形状に類する概略楕円形状を含むものとする。
前記概略楕円形状を有する針軸体１０の断面形状は、その短軸Ｘが針軸体１０の軸線Ｚが属する面とは直角な方向Ｘと一致するようにし、また長軸Ｙが針軸体１０の軸線Ｚが属する面上にあって、軸線Ｚに直角な方向Ｙと一致するようにしている。ここで、短軸Ｘ及びＸ方向は、より端的には釣針１の両側方向である。また長軸Ｙ及びＹ方向は釣針１の内外方向である。ここで内外方向とは釣針１の内面１ａと外面１ｂとがある方向であり、両側方向とは釣針１の両側面１ｃ、１ｄがある方向である。
以上のように、針軸体１０の楕円形状の断面の長軸Ｙが釣針１のＹ方向、即ち釣針１の内外方向となるようにしていることで、釣針１の湾曲を拡張するような主要な外力に対する強度を強く保持することができる。一方、釣針１を両側へ曲げたりねじったりする外力に対しても、短軸Ｘにおける適当な膨らみによる横幅寸法の確保による強度をある程度保持することができる。 The needle shaft body 10 has at least a region excluding the needle tip portion 11 and the timote portion 12, all of the region or a cross section of the needle tip portion 11 and the vicinity thereof, and a region excluding the timoto portion 12 and the vicinity thereof as shown in FIG. ).
That is, the cross-sectional shape of the needle shaft body 10 is substantially elliptical. This substantially elliptical shape includes an elliptical shape and a substantially elliptical shape similar to the elliptical shape.
The cross-sectional shape of the needle shaft body 10 having the substantially elliptical shape is such that the short axis X coincides with the direction X perpendicular to the plane to which the axis Z of the needle shaft body 10 belongs, and the long axis Y is the needle shaft body. It is on the surface to which the ten axis Z belongs, and coincides with the direction Y perpendicular to the axis Z. Here, the minor axis X and the X direction are both ends of the fishhook 1 at the end. The major axis Y and the Y direction are the inner and outer directions of the fishhook 1. Here, the inner and outer directions are directions in which the inner surface 1a and the outer surface 1b of the fishhook 1 are present, and the both-side directions are directions in which both side surfaces 1c and 1d of the fishhook 1 are present.
As described above, the major axis Y that extends the curvature of the fishhook 1 is such that the major axis Y of the elliptical cross section of the needleshaft 10 is in the Y direction of the fishhook 1, that is, inward and outward of the fishhook 1. The strength against various external forces can be kept strong. On the other hand, even with an external force that bends or twists the fishhook 1 on both sides, it is possible to maintain a certain degree of strength by securing a lateral width dimension by an appropriate bulge in the short axis X.

上記針軸体１０の断面形状において、長軸Ｙと短軸Ｘとの４つの中間領域をプレス加工による平打ち加工面Ｍとして、４つの対称な傾斜直線部ｍに構成してある。
このように針軸体１０がその周囲の４方向から平打ち加工されることで、十分に緻密に鍛造されて、良好な強度を保持することができる。そしてこの場合において、平打ち加工面Ｍが斜め方向に形成されるため、後述するように金型を長軸Ｙで分割された一対の金型で構成し、この一対の金型による２次元の加工動作でもって所定の４つの平打ち加工面Ｍを形成することができるのである。 In the cross-sectional shape of the needle shaft body 10, four intermediate regions of the major axis Y and the minor axis X are formed into four symmetrical inclined straight portions m as a flat punched surface M by press working.
In this way, the needle shaft body 10 is flattened from the four surrounding directions, so that the needle shaft body 10 can be sufficiently densely forged to maintain a good strength. In this case, since the flat-worked surface M is formed in an oblique direction, the mold is composed of a pair of molds divided by the long axis Y as will be described later, and a two-dimensional structure formed by the pair of molds. It is possible to form the predetermined four flat machining surfaces M by the machining operation.

前記各傾斜直線部ｍの一端側は短軸Ｘ線上まで達して、「く」の字状に連続するように構成されている。これによって釣針１の断面幅の小さい横幅側、即ち短軸Ｘ側を、短軸Ｘを頂点とした「く」の字状に切れ目なく連続する平打ち加工面Ｍとすることで、釣針１の両側方向（Ｘ方向）への曲げや捻りに対する強度を強化することができる。
前記傾斜直線部ｍの短軸Ｘから長軸Ｙ方向への立ち上がり角度は、略６０度とするが、その前後１０度程度の増減は可能とする。
一方、傾斜直線部ｍは長軸Ｙには達することなく、その手前の過半付近で終端する構成とされている。これによって、長軸Ｙ付近ではプレス加工の加工程度の低い湾曲部を残すことで、プレス加工時における塑性流動を容易化して、概略楕円形状への断面変形をスムーズに行わせることができる。
前記長軸Ｙ付近の湾曲部の範囲は長軸Ｙの両側にそれぞれ略３０度とするが、その前後１０度程度の増減は可能とする。 One end side of each of the inclined straight line portions m reaches the minor axis X-ray and is configured to be continuous in a “<” shape. As a result, the horizontal width side having a smaller cross-sectional width of the fishhook 1, that is, the minor axis X side, is formed as a flat-worked surface M that is continuous in the shape of a “<” with the minor axis X as a vertex. Strength against bending and twisting in both directions (X direction) can be enhanced.
The rising angle of the inclined straight part m from the minor axis X to the major axis Y direction is approximately 60 degrees, but it can be increased or decreased by approximately 10 degrees before and after that.
On the other hand, the inclined straight line portion m does not reach the major axis Y and terminates in the vicinity of the majority in front of it. As a result, by leaving a curved portion having a low degree of press working in the vicinity of the long axis Y, the plastic flow during the press working can be facilitated, and the cross-sectional deformation into a substantially elliptical shape can be performed smoothly.
The range of the curved portion in the vicinity of the major axis Y is approximately 30 degrees on both sides of the major axis Y, but can be increased or decreased by approximately 10 degrees before and after that.

図２を参照して、釣針１の針軸体１０の断面形状は、断面が円形の鋼線２０を用い、長軸Ｙで分割された一対の割型３０ａ、３０ａからなる金型３０で、短軸Ｘの両側から２次元加工として、所定の速度でプレス加工する。この場合、割型３０ａの短軸Ｘ方向深さｘが鋼線の円形断面の半径ｒより少し小さく、また割型３０ａの長軸Ｙ方向幅ｙが鋼線２０の円形断面の径２ｒよりも少し大きくなるように各割型３０ａの型断面を構成している。また割型３０ａ、３０ａの長さは、概略楕円形状の断面を構成する針軸体１０の少なくとも針先部１１とチモト部１２を除く領域、その領域の全て若しくは針先部１１とその近傍及びチモト部１２とその近傍を除く領域とすることができる。割型３０ａ、３０ａを針軸体１０の内外方向（Ｙ方向の両側）に配することなく、針軸体１０の両側方向（Ｘ方向の両側）にのみ配して２次元加工することで、割型３０ａ、３０ａの幅（長さ）を十分にとって、針軸体１０の広範な範囲にわたる加工を確保することができる。
以上のような一対の割型３０ａ、３０ａで、釣針状に構成された断面円形の鋼線２０をＸ方向の両側からプレス加工すると、鋼線２０の円形断面が、短軸Ｘと長軸Ｙの中間方向の４方向から均等に鍛造、加圧され、短軸Ｘ側で「く」字状の平打ち加工面Ｍに鍛造された状態とされる。この「く」の字状の平打ち加工面Ｍは、断面上で傾斜直線部ｍとなる。一方、長軸Ｙ側では少し拡径して湾曲部となり、全体として概略楕円形状の断面となる。 With reference to FIG. 2, the cross-sectional shape of the needle shaft body 10 of the fishing hook 1 is a mold 30 including a pair of split molds 30 a and 30 a divided by a long axis Y using a steel wire 20 having a circular cross section. As two-dimensional processing from both sides of the short axis X, press processing is performed at a predetermined speed. In this case, the depth x in the minor axis X direction of the split mold 30a is slightly smaller than the radius r of the circular cross section of the steel wire, and the long axis Y direction width y of the split mold 30a is smaller than the diameter 2r of the circular cross section of the steel wire 20. The mold section of each split mold 30a is configured to be slightly larger. The lengths of the split molds 30a, 30a are the areas excluding at least the needle tip part 11 and the chimoto part 12 of the needle shaft body 10 constituting a substantially elliptical cross section, all of the area or the needle tip part 11 and the vicinity thereof, and It can be set as the area | region except the chimoto part 12 and its vicinity. By arranging the split molds 30a, 30a in both the inner and outer directions (both sides in the Y direction) of the needle shaft body 10 and only in both directions (both sides in the X direction) of the needle shaft body 10, The width (length) of the split molds 30a, 30a is sufficiently secured, and the processing over a wide range of the needle shaft body 10 can be ensured.
When the steel wire 20 having a circular cross section configured in the shape of a fishhook is pressed from both sides in the X direction with the pair of split dies 30a and 30a as described above, the circular cross section of the steel wire 20 becomes a short axis X and a long axis Y. Forging and pressurizing uniformly from the four directions of the intermediate direction of the above, it is in a state where it is forged to the flattened surface M of “<” shape on the short axis X side. This "<"-shaped flat punching surface M becomes an inclined straight line portion m on the cross section. On the other hand, on the long axis Y side, the diameter is slightly increased to form a curved portion, and the overall oval cross section is obtained.

図３に本考案の第２の実施形態に係る釣針１の針軸体１０の軸線Ｚに対する垂直断面図を示す。この第２の実施形態の釣針１においては、針軸体１０の両側面中央にプレス加工による図示しないリブを構成したものである。従って針軸部１０の断面形状としては、上記第１の実施形態における概略楕円形状の断面において、短軸Ｘ上に小さな円弧状凸部ｎが構成されたものとなっている。
前記リブを針軸体１０の両側面中央に突出して構成することで、針軸体１０の短軸Ｘ方向への曲げやねじり外力に対する強度を付加して向上させることができる。 FIG. 3 shows a vertical sectional view with respect to the axis Z of the needle shaft body 10 of the fishing hook 1 according to the second embodiment of the present invention. In the fishing hook 1 of the second embodiment, a rib (not shown) is formed by pressing at the center of both side surfaces of the needle shaft body 10. Therefore, as a cross-sectional shape of the needle shaft portion 10, a small arc-shaped convex portion n is formed on the short axis X in the substantially elliptical cross section in the first embodiment.
By configuring the rib to project from the center of both side surfaces of the needle shaft body 10, the needle shaft body 10 can be improved by bending or bending the needle shaft body 10 in the minor axis X direction.

図４に第２の実施形態の係る釣針１をプレス加工するための一対の割型４０ａ、４０ａからなる金型４０を示す。この金型４０においては割型４０ａの短軸Ｘ線上にリブを構成すべく、断面において小さな円弧状凹部ｐを設けている。一対の割型４０ａ、４０ａで円形断面の鋼線２０をプレス加工した際に、鋼線２０の一部が塑性流動して前記円弧状凹部ｐに充填され、円弧状凸部ｎとなってリブが構成される。
なお鋼線２０と割型４０ａとの寸法関係は、上記第１の実施形態における鋼線２０と割型４０ａとの関係と同様である。 FIG. 4 shows a mold 40 composed of a pair of split molds 40a and 40a for pressing the fishing hook 1 according to the second embodiment. In this mold 40, a small arcuate recess p is provided in the cross section so as to form a rib on the short axis X-line of the split mold 40a. When the steel wire 20 having a circular cross section is pressed by the pair of split dies 40a and 40a, a part of the steel wire 20 is plastically flowed and filled into the arc-shaped concave portion p to form an arc-shaped convex portion n. Is configured.
The dimensional relationship between the steel wire 20 and the split mold 40a is the same as the relationship between the steel wire 20 and the split mold 40a in the first embodiment.

本考案の第１の実施形態に係る釣針の全体図で、（Ａ）は正面図、（Ｂ）は左側面図、（Ｃ）はＹ−Ｙ断面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a general view of the fishing hook concerning the 1st Embodiment of this invention, (A) is a front view, (B) is a left view, (C) is YY sectional drawing. 本考案の第１の実施形態に係る釣針の製造に使用する金型の例を示す断面図である。It is sectional drawing which shows the example of the metal mold | die used for manufacture of the fishing hook concerning the 1st Embodiment of this invention. 本考案の第２の実施形態に係る釣針の針軸体の軸線に対する垂直断面図である。It is a vertical cross section with respect to the axis line of the needle shaft body of the fishhook which concerns on the 2nd Embodiment of this invention. 本考案の第２の実施形態に係る釣針の製造に使用する金型の例を示す断面図である。It is sectional drawing which shows the example of the metal mold | die used for manufacture of the fishing hook concerning the 2nd Embodiment of this invention. 従来の一般的な釣針を示し、（Ａ）は正面図、（Ｂ）は左側面図、（Ｃ）はＹ−Ｙ断面図である。A conventional general fishing hook is shown, (A) is a front view, (B) is a left side view, and (C) is a YY sectional view.

符号の説明Explanation of symbols

１ 釣針
１ａ 内面
１ｂ 外面
１ｃ 側面
１ｄ 側面
１０ 針軸体
１１ 針先部
１２ チモト部
１３ 湾曲部
１４ リブ
２０ 鋼線
３０ 金型
３０ａ 割型
４０ 金型
４０ａ 割型
ｍ 傾斜加工面
ｎ 円弧状凸部
ｐ 円弧状凹部
Ｍ 平打ち加工面
Ｘ 短軸
Ｙ 長軸
Ｚ 軸線 DESCRIPTION OF SYMBOLS 1 Fishhook 1a Inner surface 1b Outer surface 1c Side surface 1d Side surface 10 Needle shaft body 11 Needle tip part 12 Chimoto part 13 Curved part 14 Rib 20 Steel wire 30 Die 30a Split type 40 Die 40a Split type m Inclined machining surface n Arc-shaped convex part p Arc-shaped recess M Flat punched surface X Short axis Y Long axis Z Axis

Claims (3)

針軸体の先端に針先部を、基端にチモト部を、また前記針先部に続く途中に湾曲部を設けた釣針であって、針軸体の軸線に対し該軸線が属する面とは直角な方向をＸ方向とし、一方、針軸体の軸線に対し該軸線が属する面上で直角な方向をＹ方向とした場合において、針軸体は、少なくとも前記針先部とチモト部を除く領域における断面形状を、全体としてＹ方向を長軸Ｙ、Ｘ方向を短軸Ｘとした概略楕円形状に構成すると共に、前記略楕円形状のうち前記長軸Ｙと短軸Ｘの中間に位置する各４領域を、プレス加工による平打ち加工面として、４つの対称な傾斜直線部に構成してあることを特徴とする釣針。   A fishhook having a needle tip at the tip of the needle shaft, a chimoto at the base, and a curved portion in the middle of the needle tip, and a surface to which the axis belongs with respect to the axis of the needle shaft When the direction perpendicular to the X direction is the X direction, and the direction perpendicular to the axis to which the axis belongs is the Y direction, the needle shaft body has at least the needle tip portion and the Timoto portion. The cross-sectional shape in the excluded region is configured as a generally elliptical shape with the major axis Y in the Y direction and the minor axis X in the X direction, and is positioned between the major axis Y and the minor axis X in the substantially elliptical shape. A fishing hook characterized in that each of the four regions to be formed is formed into four symmetrical inclined straight portions as flat-worked surfaces by press working. 針軸体は、その断面形状のうちの平打ち加工面である４つの傾斜直線部を、短軸Ｘ上で連続させると共に、長軸Ｙには達することなくその手前の過半付近で終端する構成としてあることを特徴とする請求項１に記載の釣針。   The needle shaft body has a configuration in which four inclined straight portions, which are flat-worked surfaces of its cross-sectional shape, are continued on the short axis X and terminated in the vicinity of the majority of the front without reaching the long axis Y. The fishing hook according to claim 1, wherein: 針軸体は、少なくとも針先部とチモト部を除く領域における断面形状が短軸Ｘ上において小さな円弧状凸部を構成するように、プレス加工によるリブを両側面中央に構成してあることを特徴とする請求項１に記載の釣針。   The needle shaft body has a rib formed by pressing at the center of both side surfaces so that the cross-sectional shape in the region excluding at least the needle tip portion and the chimoto portion constitutes a small arc-shaped convex portion on the short axis X. The fishing hook according to claim 1, wherein

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