JPS5927351Y2 - Wave-dissipating catamaran - Google Patents

Description

【考案の詳細な説明】 本考案は、上部船体によシ左右の胴体の各上端部を連結
された双胴船に関する。[Detailed Description of the Invention] The present invention relates to a catamaran in which upper ends of left and right fuselages are connected to an upper hull.

従来のこの種の双胴船としては、例えば第１〜３図に示
すような半没水式双胴船があり、没水体としての左右一
対の円筒状あるいは魚雷状の下部胴体１の各後端に、ら
せん推進器１ａが設けられ、各下部胴体１の上側には水
線幅の小さな支柱２が立設されている。Conventional catamarans of this type include, for example, semi-submerged catamarans as shown in Figures 1 to 3, in which a pair of left and right cylindrical or torpedo-shaped lower fuselages 1 serve as submerged bodies. A spiral propeller 1a is provided at the end, and a support 2 with a small waterline width is erected above each lower body 1.

この支柱２ば、下部胴体１のほぼ全長にわたって一体に
設けられるものと、前後に分割された形式のものとがあ
る。There are two types of struts 2: one that is provided integrally over almost the entire length of the lower fuselage 1, and the other that is divided into front and rear parts.

そして各支柱２の上端には双胴状の下部胴体１を連結す
る上部船体３が設けられている。An upper hull 3 connecting the twin-hulled lower fuselage 1 is provided at the upper end of each strut 2.

このような形式の半没水式双胴船は本来、高速航走を目
的とするものであるが、比較的低速で航走する場合には
、航走によって造られる波により、第４図に示すように
船首と船尾との中間付近で双胴間の水面が高く盛９上が
って、符号７で示すような波面を形成することが多い。This type of semi-submersible catamaran is originally intended for high-speed cruising, but when cruising at relatively low speeds, the waves created by cruising cause the waves shown in Figure 4 to As shown, the water surface between the twin hulls rises high near the middle between the bow and stern, forming a wave surface as shown by 7 in many cases.

したがって、そのような船速で波浪中を航走すると、盛
り上がった水面７に波が重畳し、上部船体３の下面に衝
突する恐れがある。Therefore, when the ship sails through waves at such a speed, the waves may be superimposed on the raised water surface 7 and collide with the lower surface of the upper hull 3.

また、このように高い波面の盛り上がりを形成すること
自体、船の推進抵抗のうちの造波抵抗成分が極めて大き
いことを示すものであり、はなはだ不具合である。Furthermore, the formation of such a high wave surface swell indicates that the wave-making resistance component of the ship's propulsion resistance is extremely large, and is a serious problem.

この水面の盛り上が９は、双胴の船首が造る波が重なっ
てできるものであるから、その船速付近で船首が造る波
會小さくすれば、こうした現象の発生は防止できる。This bulge 9 on the water surface is caused by the overlapping waves created by the bow of the twin-hulled ship, so if the waves created by the bow are made smaller around the speed of the ship, this phenomenon can be prevented from occurring.

すなわち、＝般にある体積を持った物体が水面付近全移
動すれば、それによって波が造られるので、第５図の盛
シ上がった波面７が形成されている場合に、第５図に符
号９で示す波を造れるような位置に適当な体積を持った
物体を配置することにより、船首が造った波音減少させ
ることが可能である。In other words, if an object with a certain volume moves completely near the water surface, it will create a wave, so if the raised wave surface 7 in Figure 5 is formed, the symbol in Figure 5 will be By placing an object with an appropriate volume at a position where waves can be created as shown in 9, it is possible to reduce the sound of waves created by the bow.

このような考えに従えば、第５図に示すように水中翼４
を設けて、それが造る波９で船首が造る波７會消すこと
が考えられる。According to this idea, as shown in Fig. 5, the hydrofoil 4
It is conceivable to set up a ship and use the waves it creates to cancel out the waves created by the bow.

しかしながら、水中翼４に上記の作用會させる場合には
、船首が造る波を消すために水中翼４がある量の体積を
持つことが必要であり、その形状からして水中翼の表面
積は相当な大きさとなるので、摩擦抵抗の増加量が大き
くなるという欠点があり、また水中翼の取付角の選定を
誤ると揚力を発生して姿勢変化を生じ、さらには大きな
抵抗音生じるという欠点がある。However, if the hydrofoil 4 is to have the above action, it is necessary for the hydrofoil 4 to have a certain volume in order to eliminate the waves created by the bow, and considering its shape, the surface area of the hydrofoil is quite large. Since the size of the hydrofoil is large, there is a disadvantage that the amount of increase in frictional resistance becomes large, and if the installation angle of the hydrofoil is incorrectly selected, lift is generated, causing an attitude change, and furthermore, there is a disadvantage that a loud resistance noise is generated. .

本考案は、これらの欠点の解消をはかった消波式双胴船
を提供すること全目的とする。The entire purpose of the present invention is to provide a wave-dissipating catamaran that overcomes these drawbacks.

このため本考案の消波式双胴船は、左右の胴体の各上端
部を上部船体により連結された双胴船に釦いて、上記左
右の胴体の各前半部に釦ける内側水面下に、互いに対向
するほぼ同形同大の消波用膨出部をそなえたことを特徴
としている。Therefore, in the wave-dissipating catamaran of the present invention, the upper ends of the left and right fuselages are connected to the catamaran by the upper hull, and the inner parts of the front halves of the left and right fuselages are located below the water surface. It is characterized by having wave-dissipating bulges that face each other and have substantially the same shape and size.

以下、図面により本考案の実施例について説明すると、
第６，７図は本考案の第１実施例としての消波式双胴船
を示すもので、第６図は第７図のｖｔ−ｖｔ線に沿う縦
断面図、第７図は第６図の■■線に沿う横断面図である
。Hereinafter, embodiments of the present invention will be explained with reference to the drawings.
Figures 6 and 7 show a wave-dissipating catamaran as a first embodiment of the present invention. It is a cross-sectional view taken along the line ■■ in the figure.

第６，７図に示すように、左右の下部胴体１に支柱２が
立設されて、左右の支柱２の上端部が上部船体３により
連結されている。As shown in FIGS. 6 and 7, struts 2 are erected on the left and right lower fuselage 1, and the upper ends of the left and right struts 2 are connected by an upper hull 3.

そして、左右の下部胴体１の各前半部に釦ける内側水面
下に、互いに対向するほぼ同形同大の全体として丸味を
もった膨出部８が形成されてかり、これらの対をなす膨
出部８は、各膨出部８によって造られる波が前記の船速
に釦いて船首を造られる波を打ち消すような位置に設け
られている。Then, under the inner water surface of each front half of the left and right lower fuselage 1, there are formed bulges 8 that are substantially the same shape and size and are rounded as a whole, facing each other. The protruding portions 8 are provided at positions such that the waves created by the respective protruding portions 8 cancel out the waves created by the bow of the ship at the aforementioned ship speed.

このように、船首波を有効に打ち消すのに要する体積を
膨出部８に持たせたとしても、それによる表面積ひいて
は摩擦抵抗の増加量はわずかであり、水中翼の場合のよ
うに取付は具合によって大きな揚力や誘導抵抗を生じる
こともない。In this way, even if the bulge 8 has the volume required to effectively cancel the bow wave, the resulting increase in surface area and therefore frictional resistance is small, and installation is difficult as in the case of hydrofoils. This does not create large lift or induced drag.

上述のごとく、船首により造られた波７を膨出部８が造
る波９で打ち消せば、上部船体３の下面へ向けて高く盛
り上がる波が無くなるので、波浪中を航走する際に上部
船体３の下面を波でたたかれる可能性が著しく減少する
。As mentioned above, if the waves 7 created by the bow are canceled by the waves 9 created by the bulge 8, there will be no waves rising high toward the lower surface of the upper hull 3, so when sailing in waves, the upper hull The possibility of being hit by a wave on the bottom surface of 3 is significantly reduced.

また、船首で造られた波が消えることにより船の推進抵
抗の一成分である造波抵抗が減少するので、推進性能の
向上も期待できる。Furthermore, as the waves created by the bow of the ship disappear, wave-making resistance, which is a component of the ship's propulsion resistance, is reduced, so an improvement in propulsion performance can be expected.

第８，９図は本考案の第２実施例を示すもので、第８図
は第９図の■−■線に沿う縦断面図、第９図は第８図の
ＩＸ−ＩＸ線に沿う横断面図である。Figures 8 and 9 show a second embodiment of the present invention. Figure 8 is a longitudinal sectional view taken along the line ■-■ in Figure 9, and Figure 9 is a longitudinal sectional view taken along the line IX-IX in Figure 8. FIG.

この実施例では、一対の支柱２の各内側に、一対の膨出
部８が互いに対向するように設けられているが、作用効
果については第１実施例と同様である。In this embodiment, a pair of bulges 8 are provided inside each of the pair of pillars 2 so as to face each other, but the operation and effect are the same as in the first embodiment.

また、第１０．１１図は本考案の第３実施例を示すもの
で、第１０図は第１１図のＸ−Ｘ線に沿う縦断面図、第
１１図は第１０図のＸＩ−ＸＩ線に沿う横断面図である
。Further, Fig. 10.11 shows a third embodiment of the present invention, Fig. 10 is a longitudinal sectional view taken along the line X-X in Fig. 11, and Fig. 11 is a longitudinal sectional view taken along the line XI-XI in Fig. 10. FIG.

この実施例では、左右に釦いて、それぞれ支柱２と下部
胴体１との双方にわたる一対の膨出部８が互いに対向す
るように設けられてかり、作用効果については第１，２
実施例と同様である。In this embodiment, a pair of bulges 8 are provided on the left and right sides, extending over both the support column 2 and the lower body 1, so as to face each other.
This is similar to the example.

さらに、第１２．１３図は本考案の第４実施例としての
消波型双胴船倉示すもので、第１２図は第１３図の■−
■線に沿う縦断面図、第１３図は第１２図の■−■線に
沿う横断面図である。Furthermore, Figures 12 and 13 show a wave-dissipating catamaran hold as a fourth embodiment of the present invention, and Figure 12 shows the ■-- of Figure 13.
FIG. 13 is a longitudinal cross-sectional view taken along the line (■), and FIG. 13 is a cross-sectional view taken along the line (■--■) in FIG.

この第４実施例は通常の双胴船に本考案を適用した場合
金石して釦り、左右の胴体１′の各上端部が上部船体３
により直接連結されている。In this fourth embodiment, when the present invention is applied to an ordinary catamaran, the upper ends of the left and right fuselages 1' are connected to the upper hull 3.
are directly connected by

そして、左右の胴体１′の各前半部に釦ける内側水面下
に、互いに対向するほぼ同形同大の消波用膨出部８が形
成されているが、この第４実施例の場合も前述の各実施
例と同様の作用効果が得られるのである。Further, wave-dissipating bulges 8 having substantially the same shape and size and facing each other are formed under the water surface inside the buttons on each front half of the left and right fuselage 1', but this also applies to the fourth embodiment. The same effects as in each of the above-mentioned embodiments can be obtained.

な釦、各図に釦いて符号５は舵、６は船体静止時の水面
を示している。In each figure, numeral 5 indicates the rudder, and 6 indicates the water surface when the ship is stationary.

以上詳述したように、本考案の消波型双胴船によれば、
左右の胴体の各前半部に釦ける内側水面下に、互いに対
向するほぼ同形同大の消波用膨出部上そなえるという簡
素な構成で、水中翼上段けた場合のような揚力の発生や
誘導抵抗の発生を招くことなく、効率のよい消波効果を
得て、上部船体の下面への波の衝撃を防止することがで
きしかも造波抵抗の軽減による推進性能の向上がもたら
されるのである。As detailed above, according to the wave-dissipating catamaran of the present invention,
It has a simple configuration in which there are wave-dissipating bulges of almost the same shape and size facing each other under the water surface inside the buttons on the front half of the left and right fuselage. It is possible to obtain an efficient wave-dissipating effect without causing induced resistance, preventing wave impact on the underside of the upper hull, and improving propulsion performance by reducing wave-making resistance. .

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

第１〜５図は従来の双胴船金石すもので、第１図はその
側面図、第２図は第１図の■−■線に沿う横断面図、第
３図は第１図の■−■線に沿う水平断面図、第４図は第
２図のＩＶ−ＩＶ線に沿う縦断面図であり、第５図は第
４図に対応させて水中興奮そなえた場合を示す縦断面図
であり、第６，７図は本考案の第１実施例としての消波
型双胴船倉示すもので、第６図は第７図のＶｌ−Ｖｌ線
に沿う縦断面図、第７図は第６図の■−■線に沿う横断
面図であり、第８，９図は本考案の第２実施例を示すも
ので、第８図は第９図の■−■線に沿う縦断面図、第９
図は第８図の■−ＩＸ線に沿う横断面図であり、第１０
．１１図は本考案の第３実施例を示すもので、第１０図
は第１１図のＸ−Ｘ線に沿う縦断面図、第１１図は第１
０図のＭ−Ｍ線に沿う横断面図であり、第１２，１３図
は本考案の第４実施例を示すもので、第１２図は第１３
図の■−■線に沿う縦断面図、第１３図は第１２図の■
■線に沿う横断面図である。 １・・・下部胴体、１ａ・・・らせん推進器、１′・・
・胴体、２・・・上部胴体としての支柱、３・・・上部
船体、５・・・舵、 ６・・・水面、 ７・・・船首により造られる波、 ８・・・ 膨出部、 ９・・・膨出部８により造られる波。Figures 1 to 5 are of a conventional catamaran Kinishimono. Figure 1 is a side view, Figure 2 is a cross-sectional view taken along the line ■-■ in Figure 1, and Figure 3 is a cross-sectional view of Figure 1. Fig. 4 is a horizontal cross-sectional view along line IV--IV in Fig. 2, and Fig. 5 is a longitudinal cross-sectional view corresponding to Fig. 4, showing a case where underwater excitement is provided. 6 and 7 show a wave-dissipating catamaran cargo hold as a first embodiment of the present invention, and FIG. 6 is a vertical cross-sectional view taken along the line Vl-Vl in FIG. is a cross-sectional view taken along the line ■-■ in FIG. 6, FIGS. 8 and 9 show the second embodiment of the present invention, and FIG. 8 is a longitudinal cross-sectional view taken along the line ■-■ in FIG. Front view, No. 9
The figure is a cross-sectional view taken along the line ■-IX in Figure 8, and the 10th
．． FIG. 11 shows a third embodiment of the present invention, FIG. 10 is a longitudinal sectional view taken along the line X-X in FIG. 11, and FIG.
12 and 13 are cross-sectional views taken along line M-M in FIG.
A vertical sectional view along the line ■-■ in the figure, Figure 13 is the ■■ in Figure 12.
■It is a cross-sectional view along the line. 1... Lower fuselage, 1a... Spiral thruster, 1'...
・Body, 2... Support as upper body, 3... Upper hull, 5... Rudder, 6... Water surface, 7... Waves created by the bow, 8... Swelling part, 9... Waves created by the bulge 8.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 左右の胴体の各上端部を上部船体により連結された双胴
船に釦いて、上記左右の胴体の各前半部に釦ける内側水
面下に、互いに対向するほぼ同形同大の消波用膨出部金
そなえたこと全特徴とする消波型双胴船。The upper ends of the left and right fuselages are connected to the catamaran by the upper hull, and under the water surface inside the front half of the left and right fuselages are wave-dissipating expansions of approximately the same shape and size facing each other. A wave-dissipating catamaran that is characterized by a large amount of money.