JPS6164595A - Board for board sailing - Google Patents

Abstract

PURPOSE:To improve the stability against a head wind by forming a cut part at the center part in the front part of a board formed into a plate form having the upwardly warped front part and forming a concaved part having the depth gradually increasing towards the front part, onto the undersurface of the board. CONSTITUTION:A longitudinal center part 20 and the both side parts 30 a part of which is projecting forward from the front edge 21 of the center part 20 along the both sides of the center part are installed, and a bifurcated part 11 is formed at the right and left of the front part. The both-side part 30 is formed so that the front part is formed into a plate warping upwardly. Each upper surface of the center part 20 and the both side parts 30 is formed into a smooth continuous surface 23, and the undersurface 22 is formed into a concaved part 12 having the depth gradually increasing towards the front part. Since, against a head wind W, the front part of a board is set to an upwardly warped situation, generation of pitching can be prevented, and the stable sailing in floated posture is permitted.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ボードセイリング用ボード、特に前方より強
風を受けた場合の安定性にすぐれたボードに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a board for sailing, and particularly to a board with excellent stability when exposed to strong winds from the front.

〔従来技術〕[Prior art]

通常のボードセイリング用ボードは、凹凸の少ない比較
的単純な平面形状を有すると共に前部がそり上った側面
形状をなしている。このようなボードはクローズホール
ドの場合などにおいて、斜め前方より向い風を受けると
、前部のそり上り部の下面に向い風による揚力を受けて
ピッチング（縦ゆれ）が生じ易（、更に向い風が強くな
ればボードの前部が浮き上って横に流されコントロール
が困難となる。この向い風による揚力を減少させるため
にはボード前部のそり上りを減少させることも考えられ
るが、前部が波に突っ込んだ場合の起き上りが悪くなる
おそれが生ずるので好ましくない。A normal board sailing board has a relatively simple planar shape with few irregularities and a side surface shape with a curved front part. If such a board is hit by a headwind from diagonally forward, such as in a closed-hold situation, the lower surface of the front sled will receive lift from the headwind, which can cause pitching (vertical sway). If the front part of the board lifts up and drifts sideways, it becomes difficult to control the board.In order to reduce the lift caused by this headwind, it is possible to reduce the sagging of the front part of the board. This is not preferable because there is a risk that it will be difficult to get up if it is stuck.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

本発明は前部が波に突っ込んだ場合の起き上りの悪化を
少なくして、しかも向い風によるボード前部の揚力を減
少させようとするものである。The present invention aims to reduce the deterioration of rising when the front part of the board runs into a wave, and also to reduce the lift force on the front part of the board due to headwinds.

〔問題点を解決するための手段〕[Means for solving problems]

このため、本発明のボードは、添付図面に示す如く、縦
長の中央部２０と、その左右両側にそって設けられて一
部が中央部２０の前端２１よりも前方に突出する両側部
３０．３０とにより前部の左右に二叉部１１．１１を有
しかつ前部が上方にそり上った板状に一体形成したもの
である。そして中央部２０と両側部３０の上面２３．３
３をはゾなだらかに連続せしめると共に中央部２０の前
部の下面２２を前方に近ずくにつれて次第に上方にそり
上らせて両側部３０．３０の間の下側に前方に向かつて
次第に深さが大となる四部１２を形成したものである。Therefore, as shown in the accompanying drawings, the board of the present invention has a vertically elongated central portion 20, and both side portions 30. 30, it is integrally formed into a plate shape with forked parts 11 and 11 on the left and right sides of the front part, and whose front part is curved upward. and the upper surface 23.3 of the central portion 20 and both side portions 30.
3 are continued gently, and the lower surface 22 of the front part of the central part 20 is gradually curved upward as it approaches the front, and the depth gradually increases as it goes downward and forward between the side parts 30 and 30. 4 parts 12 are formed, each having a large diameter.

〔作用〕[Effect]

本発明のボードにおいては、向い風は二叉部１１．１１
の間の隔間１３より逃げて前部のそり上り部に揚力を生
ずることは少い。また前部が波に突っ込んだ場合も、前
部の上側の水は二叉部１１゜１１の間の隙間１３より下
側に逃げて前部の浮上に対する抵抗も少くなる。通常の
帆走中は両側部３０．３０の前部の底面と、凹部１２の
そり上った下面２２に生ずる動圧により浮き上って滑走
する。In the board of the invention, the headwind is at the fork 11.11
It is rare for lift to escape from the gap 13 between the two and generate lift on the front sled section. Furthermore, even when the front part crashes into a wave, the water on the upper side of the front part escapes to the lower side through the gap 13 between the forked parts 11.degree. 11, thereby reducing the resistance to the floating of the front part. During normal sailing, the boat floats and slides due to the dynamic pressure generated on the bottom surfaces of the front portions of the side portions 30, 30 and the curved lower surface 22 of the recess 12.

〔発明の効果〕〔Effect of the invention〕

本発明は上述の如く、向い風を受けても前部のそり上り
部に揚力を生ずることが少いので、ピッチングを生じた
り前部が浮き上ってコントロールが困難となることがな
く、また、前部が波に突っ込んだ場合でも、前部の浮上
に対する抵抗が少いので前部の動圧及び浮力は小さいの
にも拘わらず起き上りは良好である。更に通常帆走中の
二叉部の間の隙間による動圧の減少は、両側部の間の凹
部に形成された前方にそり上った下面により補われるの
で滑走性能が低下することもないものである。As described above, the present invention generates little lift in the uphill section of the front sled even when faced with a headwind, so it does not cause pitching or the front section lifts up, making control difficult. Even if the front part crashes into a wave, the front part has little resistance to floating, so the front part can easily get up despite the small dynamic pressure and buoyant force. Furthermore, the decrease in dynamic pressure caused by the gap between the two prongs during normal sailing is compensated for by the forward-curved lower surface formed in the recess between both sides, so there is no decline in planing performance. be.

〔実施例〕〔Example〕

第１図及び第２図に示す如く、ボード１０は縦長の中央
部２０と、その左右両側にそって一体に設けられた両側
部３０．３０よりなり、内部に発泡スチロール、発泡ウ
レタン等の発泡体を充填した繊維強化プラスチックス等
により一体成形されている。両側部３０．３０の前部は
中央部２０の前端２１よりも前方に突出して、全体とし
て前部の左右に二叉部１１．１１を有し、かつ前部が上
方にそり上った板状に形成されている。As shown in FIGS. 1 and 2, the board 10 consists of a vertically elongated central portion 20 and both side portions 30 and 30 integrally provided along both left and right sides of the central portion 20. It is integrally molded from fiber-reinforced plastic filled with. The front parts of the side parts 30.30 protrude forward from the front end 21 of the central part 20, and have bifurcated parts 11.11 on the left and right sides of the front part as a whole, and the front parts are curved upwards. It is formed in the shape of

第３図に示す如く、中央部の上面２３と両側部３０．３
０の上面３３，３３ははソ“なだらかに連続せしめる。As shown in FIG. 3, the upper surface 23 of the central part and the side parts 30.3
The upper surfaces 33, 33 of the 0 are made to be smoothly continuous.

一方、中央部２０の前部の下面２２は前方に近ずくにつ
れて次第に上方にそり上らせて、中央部２０の前端２１
は最も薄肉とし、両側部３０．３０の間の下側に前方に
向かって次第に深さが大となる帯状の凹部１２を形成す
る。ボード１０の後部においては、中央部２００下面２
２の両側は両側部３０．３０の底面となだらかに連続せ
しめる。両側部３０．３０の内縁には後部を除き縦ステ
ップ３１．３１を形成し、凹部１２の両側面とする。第
３図に示す如く、両側部３０゜３０の底面３２．３２は
外側が上方に向いた凹曲面とし、滑走中の水切りを良く
して両側への水の巻き込みによる摩擦抵抗を減少させ、
また中央部２０の下面２２ははゾ直線状とする。ボード
１０の上面のはソ′中央部にはセイルを取り付けるマス
ト４０を起倒自在に設け、下面にはマスト４０のや＼後
方にダガーボード４１を、後端附近にフィン４２を設け
る。On the other hand, the lower surface 22 of the front part of the central part 20 gradually curves upward as it approaches the front, and the front end 22 of the central part 20
is the thinnest, and a band-shaped recess 12 is formed on the lower side between both side parts 30 and 30, and the depth gradually increases toward the front. At the rear of the board 10, the central portion 200 and the lower surface 2
Both sides of 2 are gently continuous with the bottom surfaces of both side parts 30 and 30. Vertical steps 31.31 are formed on the inner edges of both side parts 30.30, except for the rear part, and serve as both sides of the recessed part 12. As shown in FIG. 3, the bottom surfaces 32 and 32 of the both sides 30° 30 are concave curved surfaces with the outside facing upward, which improves drainage during sliding and reduces frictional resistance caused by water being drawn into both sides.
Further, the lower surface 22 of the central portion 20 has a straight line shape. On the upper surface of the board 10, a mast 40 to which a sail is attached is provided in the center so that it can be raised or lowered, and a dagger board 41 is provided on the lower surface at the rear of the mast 40, and a fin 42 is provided near the rear end.

次にその作用につき説明すれば、通常の帆走状態におい
ては、水面は第２図のＬの位置にあり、ボード１０が前
進すれば両側部３０．３０の前部の底面３２．３２と中
央部２０の前部の下面２２に生ずる動圧により浮き上っ
て滑走する。中央部２０の前部の下面２２を挾む両側部
３０．３０に、図示の実施例の如く縦ステップ３１．３
１を形成すれば、下面２２より両側に逃げる水が特に少
くなり、下面２２に発生する動圧の損失は大幅に減少す
る。ボード１０前部のそり上り部の下側に入り込む斜め
前方よりの向い風Ｗの大部分は、第２図及び第３図に示
す如く、二叉部１１．１１の間の隙間１３を通って上側
へ逃げるので、前部に揚力が生ずることは少く、従って
向い風Ｗによってピッチングを生じたり、前部が浮き上
ってコントロールが困難となることはない。またボード
１０の前部が波に突っ込んだ場合は、前部上側の水は隙
間１３の間より下側に逃げるのでボード１０の前部の浮
」二の邪魔をすることが少く、二叉部１１゜１１の浮力
とその底面３２．３２に生ずる動圧によりボード１０は
直ぐに起き上る。Next, to explain its operation, in normal sailing conditions, the water surface is at the position L in FIG. It floats up and slides due to the dynamic pressure generated on the lower surface 22 of the front part 20. On both sides 30.30, sandwiching the lower surface 22 of the front part of the central part 20, there are vertical steps 31.3, as in the embodiment shown.
1, the amount of water escaping from the lower surface 22 to both sides is particularly reduced, and the loss of dynamic pressure generated on the lower surface 22 is significantly reduced. As shown in FIGS. 2 and 3, most of the headwind W from the diagonal front that enters the underside of the uphill part of the front part of the board 10 passes through the gap 13 between the two prongs 11 and 11 to the upper side. Therefore, there is little lift generated in the front part, so there is no pitching caused by the headwind W, or the front part lifting up and making control difficult. Furthermore, when the front part of the board 10 hits a wave, the water on the upper part of the front part escapes to the lower side through the gap 13, so it is less likely to interfere with the floating part of the front part of the board 10, and The board 10 immediately rises due to the buoyant force of 11°11 and the dynamic pressure generated on its bottom surface 32,32.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図〜第３図は本発明の一実施例を示し、第１図は底
面図、第２図は中央断面図、第３図は第１図のＴｒｌ−
ＴＩＴ断面図である。 符号の説明 １０・・・ボード、１１・・・二叉部、１２・・・凹部
、２０・・・中央部、２１・・・前端、２２・・・下面
、２３・・・上面、３０・・・両側部、３３・・・上面
。 出願人　　トノクラフト株式会社 代理人　　弁理士　　長　谷　照　− （ほか１名）1 to 3 show one embodiment of the present invention, FIG. 1 is a bottom view, FIG. 2 is a central sectional view, and FIG. 3 is a Trl--
It is a TIT sectional view. Description of symbols 10... Board, 11... Forked part, 12... Recessed part, 20... Center part, 21... Front end, 22... Lower surface, 23... Upper surface, 30... ...Both sides, 33...Top surface. Applicant Tono Craft Co., Ltd. Agent Patent Attorney Teru Hase - (1 other person)

Claims (1)

【特許請求の範囲】[Claims] 縦長の中央部と、この中央部の左右両側にそって設けら
れその一部が同中央部の前端よりも前方に突出した両側
部とにより前部の左右に二叉部を有しかつ前部が上方に
そり上った板状に一体形成され、前記中央部と両側部の
上面をほゞなだらかに連続せしめると共に前記中央部の
前部の下面を前方に近ずくにつれて次第に上方にそり上
らせて前記両側部の間の下側に前方に向かって次第に深
さが大となる凹部を形成してなるボードセイリング用ボ
ード。A vertically elongated central portion and both side portions that are provided along both left and right sides of this central portion, and a portion of which protrudes forward beyond the front end of the central portion, and has forked portions on the left and right sides of the front portion, and is integrally formed into a plate shape that curves upward, and the upper surfaces of the central portion and both sides are almost gently continuous, and the lower surface of the front portion of the central portion gradually curves upward as it approaches the front. The sailing board further comprises a recessed portion that gradually increases in depth toward the front on the lower side between the two side portions.