【発明の詳細な説明】
本発明は沿岸海域に於ける、あおりイカ漁に用いる擬
餌、通称餌木を対象とした発明である。餌木の起源は明
治の頃とされ歴史は古い。元来曳型が主流であったが途
中シャクリ型も加わり今日迄幾多の釣人達の研究の対象
とされながらも、いまだに未解決の尽である。素材は桐
材が最適とされるが今日では量産目的で合成樹脂も使用
される。餌木には２つのタイプがある水に沈むシャクリ
型と浮く曳型であるが重さの違いのみで基本的には同じ
である。本発明は曳型を対象とするがシャクリ型にも適
用される。餌木の性能は視観に依る判定は極めて困難で
ある。為に釣果に拘わる専漁者に至っては剰余に購入し
漁場で漁って性能を峻別し劣る餌木は通常放置される。
以上の事から従来の餌木には次のような欠点がある。漁
場に於ける峻別に要する限られた貴重な時間の浪費及び
釣果でのみ性能の結論の得ぬ浪費的購入の経済的損失で
ある。この課題を解決し欠点を除くには、次の如き課題
の要点の解明と確認が必要である。
１．餌木の色彩に拘わるが昼間の漁では色彩に依る性能
の優劣が僅かに認められるが他の時間帯では確認できな
い。
１．釣果の優れた性能の餌木は漁場で曳き漁る時、一つ
の例外もなく皆共通して小魚の泳ぐが如き動きを示す。
前述の課題に見る如く活きた小魚を捕食する。あおりイ
カの習性を要点の結論に重ねると当然の帰結である。従
って如何にしてこの動きある餌木を創り得るか課題であ
る。通常曳型の餌木は、道糸（１）の最端に結び約３０
ｍ程を延ばし小舟で秒速０．５〜０．６ｍ程度の舟速で
漁場を曳き廻す。図２に示す姿勢で尾部のイカ鉤（４）
の一部を水面に出して浮く従来型の餌木は道糸（１）の
引きに連れて頭部に水圧をうけ底方向に潜り込む。この
時餌木の頭部が平らであれば尚深く潜る。図１の紐の取
付位置であれば更に深く潜る。同時に頭部の両側面に流
れに依る水の抵抗をうける。餌木の形状は何れも厳密に
は左右対称でない。結果例えば後方から観て頭部の右側
に依り強い抵抗をうけると、餌木の重心を軸に頭部は左
を向く同時に尾部は右側に突き出て水の抵抗を強くうけ
左側に反動し左側も同様に反動現象を生じる。この連続
する反復運動が魚の泳ぎに似た餌木の振りである。従っ
て振れを誘起し連続するには次の如き条件が付す。
１．餌木の素材が軽い事である。例えば風車は軽い羽根
程よく廻る。桐材は他の木材に比べ軽さ、強度、防水性
等何れの点でも優る適材である。
１．頭部と尾部の流れに依り生ずる水の抵抗を生み出す
形状の相対関係であり、餌木の重心を軸とした頭部と尾
部の互いの形状が、振りを誘起する双方の相対形状でな
ければならない。例えば遊園地で見る子供のシーソー遊
びである。同じ頃の子供同士であれば互いの僅かな足蹴
りで遊べるが片方が大人であれば困難であるのと同じ
く、餌木の頭部に対する尾部の形状の組み合わせは無限
であるが合致するのも容易でなく例え熟達者でも創るに
困難であり結局は偶然の産物である。本発明は、振りを
誘起する要因の条件を曳紐（２）の取付位置を図１の曳
紐（２）の如く変更する事で大幅に緩和し従来の餌木の
欠点を解決した。図２に示す如くＡ点に曳紐を取り付け
道糸（１）に引かれる従来の餌木は前述の如く反復運動
を誘起するが同時に道糸（１）の張りに依る振れを抑え
る抑制力が働くこの抑制力は道糸（１）の速度に比例す
る。秒速０．５〜０．６ｍはあおりイカ漁に於ける必然
の結果であり常識的舟速であり、より舟速を増すに伴い
振れは減少し更に速度を増すと振れは消減する。次いで
Ｂ点、Ｃ点と重心軸の方向へ紐の取付位置を移動し、同
様に試みるとＡ点よりもＢ点更にＣ点と紐の取付位置を
軸方向に移動するに伴い餌木の振れは増大する。以上の
事から道糸（１）の引きに依る振りの抑制力は軸点を零
として最端Ａ点が最大であり軸点からの距離に速度と共
に比例する。従って図１に示す如く曳紐（２）の取付位
置を変更する事で振れを増大し餌木の性能を改善する事
は、数多くの実験の結論であり舟速の限定の幅の増大で
あり更に餌木をより海底深く潜らせ従来の餌木の欠点を
大幅に除く効果がある。DETAILED DESCRIPTION OF THE INVENTION The present invention is an invention directed to artificial bait and commonly known bait trees used for fish squid fishing in the coastal sea area. The origin of the prey was around the Meiji era and its history is old. Originally the towed type was the mainstream, but the shakuri type was added on the way, and it is still the subject of research by many anglers, but it is still unresolved. Tung is the most suitable material, but today synthetic resin is also used for mass production. There are two types of bait trees, the shark type that sinks in water and the floating type, which are basically the same except for the difference in weight. The present invention is directed to a pull type, but is also applicable to a shank type. It is extremely difficult to judge the performance of bait by visual observation. For these reasons, specialized fishermen who are concerned with the results of fishing usually purchase surpluses and fish at fishing grounds to discriminate the performance.
From the above, the conventional bait has the following disadvantages. The limited precious time wasted in fishing grounds and the economic loss of wasted purchases whose performance is inconclusive only at the catch. In order to solve this problem and eliminate the disadvantages, it is necessary to clarify and confirm the following points of the problem. 1. Despite the color of the bait, during daytime fishing there is a slight difference in performance depending on the color, but it cannot be confirmed at other times. 1. The bait with excellent performance when fishing in a fishing ground has the same behavior as a small fish swimming without exception.
Prey on live small fish as seen in the previous topic. It is a natural consequence if the habit of Aori squid is repeated on the conclusion of the main point. It is therefore an issue how to create this moving bait. Normally, the bait of the pull type is tied to the end of the line (1) for about 30
Extend the fishing ground at a speed of about 0.5 to 0.6 m / s with a small boat. The squid hook (4) at the tail in the position shown in FIG.
The conventional bait that floats out of the water by floating a part of it under the water pressure on the head as the yarn (1) is pulled, sinks in the bottom direction. At this time, if the head of the bait tree is flat, it will dive deeper. At the attachment position of the string shown in FIG. At the same time, both sides of the head are subject to water resistance due to flow. Neither of the bait trees is strictly symmetric. As a result, for example, when viewed from the rear and receiving strong resistance depending on the right side of the head, the head turns to the left with the center of gravity of the bait as an axis, and the tail protrudes to the right, strongly reacts to water resistance and recoils to the left, and the left side also Similarly, a reaction phenomenon occurs. This continuous repetitive movement is a swing of a bait similar to swimming of fish. Therefore, the following conditions are applied to induce and continuously shake. 1. The bait material is light. For example, a windmill turns better as lighter blades. Paulownia is a suitable material that is superior to other woods in all aspects such as lightness, strength and waterproofness. 1. This is a relative relationship between the shapes that create the resistance of water generated by the flow of the head and tail. No. For example, seesaw play by a child in an amusement park. Children of the same age can play with each other with a slight kick, but it is difficult for one to be an adult. It is not easy, and even an expert is difficult to create, and it is a coincidence. The present invention solves the drawback of the conventional bait by drastically reducing the condition of the factor inducing the swing by changing the attachment position of the drawstring (2) as shown in FIG. As shown in FIG. 2, the conventional bait attached with a drawstring at point A and pulled on the line (1) induces a repetitive movement as described above, but at the same time, has a restraining force that suppresses the deflection caused by the tension of the line (1). This restraining force acting is proportional to the speed of the yarn (1). The speed of 0.5 to 0.6 m / s is a necessary result of the squid fishing and is a common sense boat speed. The swing decreases as the boat speed increases, and the swing disappears when the speed is further increased. Next, the attachment position of the string is moved in the direction of the point B, the point C and the center of gravity, and if the same is tried, the movement of the attachment point of the point B and the attachment point of the string and the string is moved more than the point A in the axial direction. Increases. From the above, the suppression force of the swing caused by the pulling of the yarn (1) is the maximum at the extreme end point A with the axial point being zero, and is proportional to the distance from the axial point with the speed. Therefore, as shown in FIG. 1, changing the attachment position of the drawstring (2) to increase the run-out and improve the performance of the bait is a conclusion of many experiments and an increase in the limited width of the boat speed. Furthermore, it is effective in making the bait dive deeper into the seabed and largely eliminating the drawbacks of the conventional bait.
【図面の簡単な説明】
【図１】 本発明の曳紐の取付位置を示す斜視図であ
る。
【図２】 従来の餌木の曳紐の取付位置及び実施例を
示す斜視図である。
【符号の説明】
１は道糸 ２は曳紐 ３はおもり ４はイ
カ鉤 ５は目玉
６は貫通孔 ７は羽毛BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an attachment position of a drawstring of the present invention. FIG. 2 is a perspective view showing a mounting position and an embodiment of a conventional bait string. [Description of Signs] 1 is a line thread 2 is a drawstring 3 is a weight 4 is a squid hook 5 is an eyeball 6 is a through hole 7 is a feather