JP2023111606A

JP2023111606A - boat

Info

Publication number: JP2023111606A
Application number: JP2022013529A
Authority: JP
Inventors: 弘之早川; Hiroyuki Hayakawa
Original assignee: Union Japan Co Ltd
Current assignee: Union Japan Co Ltd
Priority date: 2022-01-31
Filing date: 2022-01-31
Publication date: 2023-08-10

Abstract

To provide an unprecedented extremely practical boat.SOLUTION: In a boat having right and left float shells 1, 1 having prescribed lengths from a hull front part to the rear, a ship bottom part 2 provided in between the right and left float shells 1, 1, and a transom part 3 provided on a rear end part of the ship bottom part 2, a bottom surface of the ship bottom part 2 is composed of a front inclined bottom surface part 2A inclined downward from a bow part to the rear, a flat bottom surface part 2B connected to a rear end part of the front inclined bottom surface part 2A, and a rear inclined bottom surface part 2C connected to a rear end part of the flat bottom surface part 2B and inclined upward to the transom part 3.SELECTED DRAWING: Figure 1

Description

特許法第３０条第２項適用申請有り（１）２０２１年１０月３０日～３１日「ＧＲＩＭＰＪＡＰＡＮＲｏｐｅＲｅｓｃｕｅＣｏｍｐｅｔｉｔｉｏｎ２０２１」において公開（株式会社ユニオンジャパン証明書）（２）２０２１年１０月３０日～３１日「ＧＲＩＭＰＪＡＰＡＮＲｏｐｅＲｅｓｃｕｅＣｏｍｐｅｔｉｔｉｏｎ２０２１」において公開（ＧＲＩＭＰＪＡＰＡＮ実行委員会証明書）Application for application of Article 30, Paragraph 2 of the Patent Act (1) October 30-31, 2021 Published at “GRIMP JAPAN Rope Rescue Competition 2021” (Union Japan Certificate Co., Ltd.) (2) October 30, 2021 - 31st Published at "GRIMP JAPAN Rope Rescue Competition 2021" (Certificate of GRIMP JAPAN Executive Committee)

本発明は、ボートに関するものである。 The present invention relates to boats.

従来から、河川や湖沼などで使用される小型船舶として特許文献１に開示されるボート（以下、「従来例」という。）が提案されている。 BACKGROUND ART Conventionally, a boat disclosed in Patent Document 1 (hereinafter referred to as "conventional example") has been proposed as a small boat used in rivers, lakes, and the like.

この従来例は、船体前部から後方に所定長さを有する左右の浮き胴部と、この左右の浮き胴部間に設けられる船底部と、この船底部の後端部に設けられるトランサム部とを有する構造（インフレータブルボート）であり、水上安定性に優れ、しかも、船体が軽くて搬送し易く、折り畳んで収納が可能なため保管に便利である。 This conventional example includes left and right floating trunk portions having a predetermined length rearward from the front of the hull, a bottom portion provided between the left and right floating trunk portions, and a transom portion provided at the rear end of the bottom portion. It is a structure (inflatable boat) that has a

実開平５－７６９９５号公報Japanese Utility Model Laid-Open No. 5-76995

ところで、従来例は、図11に図示したように河川や湖沼などの水上で走行中、船体後方から波に起因して水流を受けた場合、この水流がトランサム部53を押圧することで船体は前方へ押し流されてしまい（特にエッジと言われるトランサム部53の下端縁53’に水流が掛かることで該トランサム部53には沈降方向への力が付与され、船体は強く前方へ押し流されてしまう。）、よって、この船体後方から水流を受けている状況において減速させにくく、また、停止させた状態を保持しにくいなどの問題がある。符号52は船底部である。 By the way, in the conventional example, as shown in FIG. 11, when the hull is running on water such as a river or a lake and receives a water flow caused by a wave from the rear of the hull, the water flow presses the transom portion 53, and the hull collapses. The hull is pushed forward (in particular, the water flow is applied to the lower edge 53' of the transom portion 53, which is called the edge, and a force in the direction of sinking is applied to the transom portion 53, and the hull is strongly pushed forward. ), therefore, it is difficult to decelerate and maintain the stopped state in the situation where the water flow is received from the rear of the hull. Reference numeral 52 is the bottom of the ship.

本発明は、前述した問題点に鑑みなされたもので、従来にない非常に実用的なボートを提供する。 SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and provides a very practical boat that has never been seen before.

添付図面を参照して本発明の要旨を説明する。 The gist of the present invention will be described with reference to the accompanying drawings.

船体前部から後方へ所定長さを有する左右の浮き胴部１，１と、この左右の浮き胴部１，１間に設けられる船底部２と、この船底部２の後端部に設けられるトランサム部３とを有するボートであって、前記船底部２の下面は、前記船首部から後方へ下り傾斜する前方傾斜下面部２Ａと、この前方傾斜下面部２Ａの後端部に連設される平坦下面部２Ｂと、この平坦下面部２Ｂの後端部に連設され前記トランサム部３まで上り傾斜する後方傾斜下面部２Ｃとで構成されていることを特徴とするボートに係るものである。 Left and right floating body parts 1, 1 having a predetermined length rearward from the front part of the hull, a ship bottom part 2 provided between the left and right floating body parts 1, 1, and a rear end part of the ship bottom part 2. A boat having a transom portion 3, wherein the lower surface of the ship bottom portion 2 is connected to a forward inclined lower surface portion 2A that inclines backward from the bow portion and a rear end portion of the forward inclined lower surface portion 2A. This boat is characterized by comprising a flat lower surface portion 2B and a rearwardly inclined lower surface portion 2C which is continuously connected to the rear end portion of the flat lower surface portion 2B and slopes upward to the transom portion 3.

また、請求項１記載のボートにおいて、前記後方傾斜下面部２Ｃの上り傾斜角度は２５度～３５度に設定されていることを特徴とするボートに係るものである。 The boat according to claim 1 is characterized in that the upward inclination angle of the backward inclined lower surface portion 2C is set to 25 degrees to 35 degrees.

また、請求項１，２いずれか１項に記載のボートにおいて、前記前方傾斜下面部２Ａの長さは前記船底部２全長の３０～４０％、前記後方傾斜下面部２Ｃの長さは前記船底部２全長の１０～２０％に設定されていることを特徴とするボートに係るものである。 Further, in the boat according to any one of claims 1 and 2, the length of the forward inclined lower surface portion 2A is 30 to 40% of the total length of the ship bottom portion 2, and the length of the rearward inclined lower surface portion 2C is the length of the ship. It relates to a boat characterized in that it is set to 10 to 20% of the total length of the bottom portion 2.

また、請求項１～３いずれか１項に記載のボートにおいて、前記トランサム部３は後方倒れ傾斜状態に設けられていることを特徴とするボートに係るものである。 Further, the boat according to any one of claims 1 to 3 is characterized in that the transom portion 3 is provided in a rearward tilted state.

また、請求項４記載のボートにおいて、前記トランサム部３の後方倒れ傾斜角度は、鉛直から１０度～２０度に設定されていることを特徴とするボートに係るものである。 The boat according to claim 4 is characterized in that the rearward inclination angle of the transom portion 3 is set to 10 degrees to 20 degrees from the vertical.

また、請求項１～５いずれか１項に記載のボートにおいて、水上に浮かべた場合、前記トランサム部３と前記後方傾斜下面部２Ｃとの境界が水面よりも上となるように浮力が設定されていることを特徴とするボートに係るものである。 Further, in the boat according to any one of claims 1 to 5, the buoyancy is set so that the boundary between the transom portion 3 and the rearwardly inclined lower surface portion 2C is above the water surface when floating on water. It relates to a boat characterized by

また、請求項１～６いずれか１項に記載のボートにおいて、前記船底部２の下面には、前記船底部２の前端部から後端部まで延設される凹溝部４が船体幅方向に間隔を介して複数並設されていることを特徴とするボートに係るものである。 Further, in the boat according to any one of claims 1 to 6, a recessed groove portion 4 extending from the front end to the rear end of the ship bottom portion 2 is provided on the lower surface of the ship bottom portion 2 in the width direction of the ship body. The present invention relates to a boat characterized in that a plurality of such devices are arranged side by side with an interval therebetween.

また、請求項７記載のボートにおいて、前記凹溝部４は縦断面逆Ｖ字状であることを特徴とするボートに係るものである。 The boat according to claim 7 is characterized in that the concave groove portion 4 has an inverted V-shaped longitudinal section.

また、請求項７，８いずれか１項に記載のボートにおいて、前記凹溝部４は、前記左右の浮き胴部１，１と前記船底部２との境界部夫々に設けられる外側凹溝部４Ａと、この外側凹溝部４Ａ間に設けられる内側凹溝部４Ｂとで構成されていることを特徴とするボートに係るものである。 Further, in the boat according to any one of claims 7 and 8, the concave groove portion 4 includes an outer concave groove portion 4A provided at each boundary portion between the left and right floating body portions 1, 1 and the ship bottom portion 2. , and an inner groove portion 4B provided between the outer groove portions 4A.

また、請求項９記載のボートにおいて、前記外側凹溝部４Ａは前記内側凹溝部４Ｂより深い凹溝部４であることを特徴とするボートに係るものである。 The boat according to claim 9 is characterized in that the outer recessed groove portion 4A is a recessed groove portion 4 deeper than the inner recessed groove portion 4B.

また、請求項１～９いずれか１項に記載のボートにおいて、前記左右の浮き胴部１，１の後端部１ｂ，１ｂは錐形状であることを特徴とするボートに係るものである。 The boat according to any one of claims 1 to 9, wherein the rear ends 1b, 1b of the left and right floating trunks 1, 1 are cone-shaped.

また、請求項１～１１いずれか１項に記載のボートにおいて、前記左右の浮き胴部１，１及び前記船底部２は内部に気体が充填される中空構造体であることを特徴とするボートに係るものである。 Further, in the boat according to any one of claims 1 to 11, the left and right floating body parts 1, 1 and the ship bottom part 2 are hollow structures filled with gas. It is related to

本発明は上述のように構成したから、前述した従来例に比し、良好な使用状態が得られるなど、従来にない非常に実用的なボートを提供する。 Since the present invention is constructed as described above, it can provide a very practical boat which is not conventional and can be used in a better condition than the above-mentioned conventional example.

本実施例を示す平面図である。It is a top view which shows a present Example. 本実施例を示す正面図である。It is a front view which shows a present Example. 図１のＡ－Ａ断面図である。FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; 図１のＢ－Ｂ断面図である。FIG. 2 is a cross-sectional view taken along the line BB of FIG. 1; 本実施例の要部を説明する斜視図である。It is a perspective view explaining the principal part of a present Example. 本実施例の要部を説明する斜視図である。It is a perspective view explaining the principal part of a present Example. 本実施例の使用状態説明図である。FIG. 4 is an explanatory diagram of a usage state of the embodiment; 本実施例の要部の説明図である。FIG. 3 is an explanatory diagram of the main part of the embodiment; 本実施例の使用状態説明図である。FIG. 4 is an explanatory diagram of a usage state of the embodiment; 本実施例の使用状態説明図である。FIG. 4 is an explanatory diagram of a usage state of the embodiment; 従来例の要部の説明図である。FIG. 10 is an explanatory diagram of a main part of a conventional example;

好適と考える本発明の実施形態を、図面に基づいて本発明の作用を示して簡単に説明する。 A preferred embodiment of the present invention will be briefly described with reference to the drawings showing the operation of the present invention.

本発明は、例えば水上にて船体後方から水流を受けた場合、水流は船底部２の後方傾斜下面部２Ｃから下方へ潜り込むように流れて平坦下面部２Ｂ及び前方傾斜下面部２Ａへと抜けていく。この際、水流の流れ方向に対して傾斜する後方傾斜下面部２Ｃで水流を受けることで船体後部（船尾部）に浮力が生じることも相まって水流の前方への抜けが良好に行われる（図７，８参照）。 In the present invention, for example, when a water stream is received from the rear of the hull on the water, the water stream flows downward from the rearwardly inclined lower surface portion 2C of the ship bottom portion 2 and passes through the flat lower surface portion 2B and the forwardly inclined lower surface portion 2A. go. At this time, buoyancy is generated in the rear part of the hull (stern part) by receiving the water flow at the backward inclined lower surface portion 2C that is inclined with respect to the flow direction of the water flow. , 8).

従って、従来例に比し、船体後方から水流を受けている状況において減速させ易く、また、停止させた状態を保持し易いなど、良好な使用状態が得られることになる。 Therefore, as compared with the conventional example, it is easy to decelerate when receiving a water stream from the rear of the hull, and it is easy to maintain a stopped state, so that a good operating condition can be obtained.

本発明の具体的な実施例について図面に基づいて説明する。 A specific embodiment of the present invention will be described with reference to the drawings.

本実施例は、船体前部から後方へ所定長さを有する左右の浮き胴部１，１と、この左右の浮き胴部１，１間に設けられる船底部２と、この船底部２の後端部に設けられるトランサム部３とを有するボートであって、左右の浮き胴部１，１，船底部２及びトランサム部３とで囲繞された乗船空間を有し、左右の浮き胴部１，１及び船底部２への気体の導入導出により膨縮する構造（インフレータブルボート）である。尚、本実施例では救助用ボートとしているが、本実施例の特性発揮する構成であれば適宜採用し得るものである。 This embodiment comprises left and right floating trunk portions 1, 1 having a predetermined length rearward from the front portion of the hull, a ship bottom portion 2 provided between the left and right floating trunk portions 1, 1, and a rear portion of the ship bottom portion 2. A boat having a transom portion 3 provided at an end thereof, and having a boarding space surrounded by the left and right floating body portions 1, 1, a ship bottom portion 2, and a transom portion 3. 1 and a structure (inflatable boat) that expands and contracts by introducing and discharging gas to and from the bottom portion 2 of the ship. In this embodiment, a rescue boat is used, but any configuration that exhibits the characteristics of this embodiment can be used as appropriate.

以下、本実施例に係る構成各部について詳細な説明をする。 Hereinafter, detailed description will be given of each component of the configuration according to the present embodiment.

左右の浮き胴部１，１は、図１～６に図示したように適宜な合成ゴム製シートやＰＶＣシートや合成繊維シートなどを積層して成る気密性，可撓性及び耐久性を有するボート形成用シートを、所定径を有する断面円形の筒状に形成したチューブ体（気胴／アウターチューブ）であり、所定位置に設けた気体導入導出部５（エアーバルブ）から適宜な気体（例えば空気）を導入導出することで膨縮するように構成されている。 The left and right floating bodies 1, 1 are airtight, flexible and durable boats made by laminating suitable synthetic rubber sheets, PVC sheets, synthetic fiber sheets, etc. as shown in FIGS. The forming sheet is a tube body (gas cylinder/outer tube) formed into a cylindrical shape with a circular cross section having a predetermined diameter, and an appropriate gas (e.g., air ) is configured to expand and contract by introducing and deriving.

また、左右の浮き胴部１，１は、船体前部（船首部）において前端部１ａ，１ａ同士が連設され船体後部（船尾部）において後端部１ｂ，１ｂ同士が分離開放された平面視Ｕ字状の気胴体として構成されており、この左右の浮き胴部１，１の分離開放された後端部１ｂ，１ｂ同士間には後述するトランサム部３が架設状態に設けられている。 In addition, the left and right floating body parts 1, 1 are planes in which the front ends 1a, 1a are connected to each other at the front part (bow part) of the hull, and the rear ends 1b, 1b are separated and opened at the rear part of the hull (stern part). It is configured as a U-shaped gas body, and a transom portion 3, which will be described later, is provided in a bridged state between the rear ends 1b, 1b of the left and right floating body portions 1, 1, which are separated and opened. .

尚、船体前部（左右の浮き胴部１，１の前端部１ａ，１ａ同士）は、船体後部（左右の浮き胴部１，１の後端部１ｂ，１ｂ同士）と同様に分離開放された構造でも良い。 The front part of the hull (front ends 1a, 1a of the left and right floating bodies 1, 1) is separated and opened in the same manner as the rear part of the hull (rear ends 1b, 1b of the left and right floating bodies 1, 1). structure may be used.

また、左右の浮き胴部１，１の後端部１ｂ，１ｂ夫々は、錐形状（先端円弧面を有する円錐形状）に設けられており、左右の浮き胴部１，１の後端部１ｂ，１ｂ下面は後方へ向けて上り傾斜状態に設けられている。 Further, the rear ends 1b, 1b of the left and right floating bodies 1, 1 are provided in a conical shape (a conical shape having an arcuate surface at the tip), and the rear ends 1b of the left and right floating bodies 1, 1 have a conical shape. , 1b are inclined upward toward the rear.

従って、左右の浮き胴部１，１の後端部１ｂ，１ｂ下面においても、後述する船底部２の後方傾斜下面部２Ｃと同様、船体後方から水流を受けた場合にこの水流を下方へ誘導する為（船体後部に浮力を付与する為）の傾斜として機能する。 Therefore, when the water flow is received from the rear of the hull, the lower surfaces of the rear ends 1b, 1b of the left and right floaters 1, 1 are guided downward, similarly to the rearwardly inclined lower surface portion 2C of the bottom portion 2, which will be described later. It functions as a tilt for (to give buoyancy to the rear part of the hull).

また、本実施例では、図１，３，４，５に図示したように左右の浮き胴部１，１の前端側内面同士間に架設筒部１ｃが設けられており、この架設筒部１ｃを設けることで船体前部には収納凹部１ｄが形成されている。符号１ｅは収納凹部１ｃの上部開口部を閉塞可能なカバー体、１ｆはカバー体１ｅを固定する固定ベルトである。 Further, in this embodiment, as shown in FIGS. 1, 3, 4 and 5, a bridging tubular portion 1c is provided between the inner surfaces of the front end sides of the left and right floating body portions 1, 1. The bridging tubular portion 1c A storage recess 1d is formed in the front part of the hull by providing the . Reference numeral 1e denotes a cover body capable of closing the upper opening of the storage recess 1c, and 1f denotes a fixing belt for fixing the cover body 1e.

船底部２は、図１～６に図示したように前述したボート形成用シートを上下対向位置に間隔を介して構成される板状の中空構造体であり、この船底部２の前端部及び左右側端部は前述した平面視Ｕ字状の気胴体（左右の浮き胴部）の内周縁に連結され、後端部は左右の浮き胴部１，１に架設されるトランサム部３の下端部に連結されており、所定位置に設けた気体導出入部５（エアーバルブ）から適宜な気体（例えば空気）の導入導出により膨縮するように構成されている。尚、この船底部２及び前述した左右の浮き胴部１，１から気体を導出させた収縮状態においてコンパクトに折り畳んで保管することができる。 As shown in FIGS. 1 to 6, the ship bottom portion 2 is a plate-like hollow structure formed by vertically opposing the above-described boat-forming sheets with an interval therebetween. The side ends are connected to the inner peripheral edges of the above-mentioned U-shaped gas bodies (left and right floating body parts), and the rear end part is the lower end part of the transom part 3 that is laid over the left and right floating body parts 1, 1. , and is configured to expand and contract by introducing and discharging appropriate gas (for example, air) from a gas inlet/outlet portion 5 (air valve) provided at a predetermined position. In addition, in the contracted state in which the gas is led out from the bottom portion 2 and the left and right floating body portions 1, 1, it can be folded compactly for storage.

また、船底部２の内部には、図４に図示したように前端部から後端部まで延設される仕切り壁部２ａが船体幅方向に間隔を介して複数並設されており、船底部２の長手方向に長さを有して互いに通気連通状態となる複数の気体充填空間部Ｓが設けられている。 As shown in FIG. 4, a plurality of partition walls 2a extending from the front end to the rear end of the ship bottom 2 are arranged side by side at intervals in the width direction of the ship. A plurality of gas-filled spaces S having lengths in the longitudinal direction of 2 and communicating with each other are provided.

また、船底部２の下面は、図３に図示したように船体側方から見て船体前部（船首部）から後方へ下り傾斜する前方傾斜下面部２Ａと、この前方傾斜下面部２Ａの後端部に連設される平坦下面部２Ｂと、この平坦下面部２Ｂの後端部に連設されトランサム部３まで上り傾斜する後方傾斜下面部２Ｃとで構成されている。 As shown in FIG. 3, the lower surface of the ship bottom 2 includes a forward inclined lower surface portion 2A that is downwardly inclined rearward from the front portion (bow portion) of the hull as viewed from the side of the hull, and a forward inclined lower surface portion 2A that is behind the forward inclined lower surface portion 2A. It is composed of a flat lower surface portion 2B connected to the end portion and a rearwardly inclined lower surface portion 2C connected to the rear end portion of the flat lower surface portion 2B and inclined upward to the transom portion 3. As shown in FIG.

本実施例は、本実施例に係るボートを水上に浮かべた場合に平坦下面部２Ｂは水平状態となり、この水平状態の平坦下面部２Ｂに対して前方傾斜下面部２Ａ及び後方傾斜下面部２Ｃは上り傾斜状態となるように構成され、更に、平坦下面部２Ｂ及び後方傾斜下面部２Ｃはトランサム部３の下端部より低い位置となるように構成されている。 In this embodiment, when the boat according to this embodiment is floated on the water, the flat lower surface portion 2B is in a horizontal state. Further, the flat lower surface portion 2B and the rearwardly inclined lower surface portion 2C are configured to be positioned lower than the lower end portion of the transom portion 3. As shown in FIG.

本出願人は、船体前後方向から水流を受けた際の水上安定性の観点から、この前方傾斜下面部２Ａと平坦下面部２Ｂと後方傾斜下面部２Ｃの長さ寸法に関して種々の実験を行い、前方傾斜下面部２Ａの長さは船底部２全長の３０～４０％、後方傾斜下面部２Ｃの長さは船底部２全長の１０～２０％となるのが望ましいことを確認しており、本実施例では、前方傾斜下面部２Ａの長さは最適な結果が得られた船底部２全長の約３５％、後方傾斜下面部２Ｃの長さは最適な結果が得られた船底部２全長の約１５％に設定している。 The applicant conducted various experiments on the length dimensions of the forward inclined lower surface portion 2A, the flat lower surface portion 2B, and the rearward inclined lower surface portion 2C from the viewpoint of water stability when water flow is received from the longitudinal direction of the hull. It has been confirmed that the length of the forward inclined lower surface portion 2A is preferably 30 to 40% of the total length of the bottom portion 2, and that the length of the rearward inclined lower surface portion 2C is preferably 10 to 20% of the total length of the bottom portion 2. In the embodiment, the length of the forward inclined lower surface portion 2A is about 35% of the total length of the ship bottom portion 2 where the optimum results are obtained, and the length of the rearward inclined lower surface portion 2C is the total length of the ship bottom portion 2 where the optimum results are obtained. It is set at about 15%.

また、後方傾斜下面部２Ｃは、船体後方から水流を受けた場合にこの水流を下方へ誘導する為（船尾部に浮力を付与する為）の傾斜であり、この点においても本出願人は種々の実験を行い、この後方傾斜下面部２Ｃの上り傾斜角度は、２５度～３５度が望ましいことを確認しており、本実施例では、後方傾斜下面部２Ｃの上り傾斜角度は最適な結果が得られた約２０度に設定している。 In addition, the rearwardly inclined lower surface portion 2C is inclined in order to guide the water flow downward (to give buoyancy to the stern portion) when receiving the water flow from the rear of the hull. , and confirmed that the upward inclination angle of the backward inclined lower surface portion 2C is preferably 25 degrees to 35 degrees. It is set to about 20 degrees obtained.

従って、例えば船体後方から水流を受けた場合、水流は船底部２の後方傾斜下面部２Ｃから下方へ潜り込むように流れて平坦下面部２Ｂ及び前方傾斜下面部２Ａへと抜けていくことになり、この際、水流の流れ方向に対して傾斜する後方傾斜下面部２Ｃで水流を受けることで船体後部（船尾部）に浮力が生じることも相まって水流の抜けが良好に行われる（図７，８参照）。 Therefore, for example, when a water stream is received from the rear of the hull, the water stream flows downward from the rearwardly inclined lower surface portion 2C of the ship bottom portion 2 and passes through the flat lower surface portion 2B and the forwardly inclined lower surface portion 2A. At this time, buoyancy is generated in the rear portion of the hull (stern portion) by receiving the water flow at the rearwardly inclined lower surface portion 2C that is inclined with respect to the flow direction of the water flow. ).

また、船底部２の下面には、該船底部２の前端部から後端部まで延設される縦断面逆Ｖ字状の凹溝部４が船体幅方向に間隔を介して複数並設されている。 A plurality of recessed grooves 4 having an inverted V-shaped vertical cross section extending from the front end to the rear end of the ship bottom 2 are arranged side by side in the width direction of the ship on the lower surface of the ship bottom 2. there is

この凹溝部４は、図２，４，６に図示したように左右の浮き胴部１，１と船底部２との境界部夫々に設けられる外側凹溝部４Ａと、この外側凹溝部４Ａ間に設けられる内側凹溝部４Ｂとで構成され、左右の外側凹溝部４Ａは浮き胴部１，１と連設する下方位置に設けられ、内側凹溝部４Ｂは前述した仕切り壁部２ａの下方位置に設けられており、更に、この左右の外側凹溝部４Ａは内側凹溝部４Ｂより深い凹溝部４である。 As shown in FIGS. 2, 4 and 6, the grooves 4 are formed between the outer grooves 4A provided at the boundaries between the left and right floats 1, 1 and the ship bottom 2, and between the outer grooves 4A. The left and right outer groove portions 4A are provided below the floating body portions 1, 1, and the inner groove portion 4B is provided below the partition wall portion 2a. Further, the left and right outer groove portions 4A are deeper groove portions 4 than the inner groove portions 4B.

この凹溝部４（外側凹溝部４Ａ及び内側凹溝部４Ｂ）により、船体の前後方向に流れる複数本の水流（整流）が形成されることになり、前述した船底部２の後方傾斜下面部２Ｃと共に、船体後方から水流を受けている状況における減速時や停止時、その他、前進走行移動時における良好な使用状態を得ることに貢献する。 The grooves 4 (the outer grooves 4A and the inner grooves 4B) form a plurality of water streams (straightening) flowing in the longitudinal direction of the hull. , contributes to obtaining good operating conditions during deceleration and stopping under the condition of receiving water flow from the rear of the hull, and during forward running movement.

即ち、前述したように例えば船体後方から水流を受けた場合、水流は船底部２の後方傾斜下面部２Ｃから下方へ潜り込むように流れて平坦下面部２Ｂ及び前方傾斜下面部２Ａへと抜けていくことになるが、この凹溝部４（外側凹溝部４Ａ及び内側凹溝部４Ｂ）の存在によっても水流の抜けが良好となる。 That is, as described above, for example, when a water stream is received from the rear of the hull, the water stream flows downward from the rearwardly inclined lower surface portion 2C of the ship bottom 2 and passes through the flat lower surface portion 2B and the forwardly inclined lower surface portion 2A. However, the presence of the grooves 4 (the outer grooves 4A and the inner grooves 4B) also facilitates the flow of water.

また、特に船外機30を用いた前進走行移動時においては、凹溝部４の存在により直進安定性に秀れるのは勿論、この凹溝部４及び船底部２の後方傾斜下面部２Ｃに沿ってプロペラ部33への水流（上方への水流）が生じることになり、キャビテーション（空気の流入による空転）が生じにくく良好な推進力が得られることになる（図９，10参照）。 In particular, when the outboard motor 30 is used to travel forward, the presence of the recessed groove 4 makes it possible to achieve excellent straight running stability. A water flow (upward water flow) to the propeller portion 33 is generated, so that cavitation (idling due to inflow of air) is unlikely to occur, and a good propulsive force can be obtained (see FIGS. 9 and 10).

また、本実施例は、船底部２に平坦下面部２Ｂを備えたから、停止時の安定性に秀れるのは勿論、高い滑走力を発揮し、更に、良好な旋回性能を発揮することになる。 Further, in this embodiment, since the flat lower surface portion 2B is provided in the bottom portion 2, the stability at the time of stopping is of course excellent, the high planing force is exhibited, and the excellent turning performance is exhibited. .

トランサム部３は、図１，３，５，６に図示したように適宜な木製部材で形成された板状体であり、左右の浮き胴部１，１の後端側内面に架設状態に設けられ、船底部２（後方傾斜下面部２Ｃ）の後端部に立設状態に連設されている。 1, 3, 5, and 6, the transom portion 3 is a plate-like body formed of a suitable wooden member, and is provided in a bridging state on the rear end side inner surfaces of the left and right floating body portions 1, 1. It is connected to the rear end portion of the ship bottom portion 2 (rearwardly inclined lower surface portion 2C) in an upright state.

このトランサム部３は、船外機30（エンジン部31と、駆動軸部32と、プロペラ部33とを有するもの）を着脱自在とするものであり、上端部中央には金属製の補強板３ａが設けられている。 The outboard motor 30 (having an engine portion 31, a drive shaft portion 32, and a propeller portion 33) can be detachably attached to the transom portion 3. A reinforcing plate 3a made of metal is provided at the center of the upper end portion of the transom portion 3. is provided.

また、トランサム部３は後方倒れ傾斜状態に設けられている。 Further, the transom portion 3 is provided in a rearward tilted state.

このトランサム部３の傾斜は、前述した船底部２の後方傾斜下面部２Ｃと同様、船体後方から水流を受けた場合にこの水流を下方へ誘導する為の傾斜であり、本出願人は、このトランサム部３の傾斜角度は、種々の実験により１０～２０度に設定することが良いことを確認しており、本実施例では最適な結果が得られた約１５度に設定している。 The inclination of the transom portion 3 is similar to the rearwardly inclined lower surface portion 2C of the ship bottom portion 2 described above, and is an inclination for guiding the water flow downward when receiving the water flow from the rear of the hull. Various experiments have confirmed that the inclination angle of the transom portion 3 is preferably set to 10 to 20 degrees.

また、トランサム部３は、下端部に水抜き孔３ｂが設けられており、この水抜き孔３ｂには逆流防止機能を発揮する水抜きホース３ｃが設けられている。 Further, the transom portion 3 is provided with a drain hole 3b at the lower end thereof, and a drain hose 3c is provided in the drain hole 3b to exhibit a backflow prevention function.

また、本実施例では、水上に浮かべた場合、トランサム部３と後方傾斜下面部２Ｃとの境界が水面よりも上となるように船体（左右の浮き胴部１，１及び船底部２）の浮力が設定されている。 In this embodiment, when floating on water, the hull (left and right floating trunk portions 1, 1 and bottom portion 2) is arranged so that the boundary between the transom portion 3 and the rearwardly inclined lower surface portion 2C is above the water surface. buoyancy is set.

従って、船底部２の後方傾斜下面部２Ｃの機能が良好に発揮される。尚、仮に重量がトランサム部３まで沈んだとしても、トランサム部３は後方倒れ傾斜状態であるのは勿論、水流は水面だけでなく生じているものであるから、常に船底部２の後方傾斜下面部２Ｃの機能が良好に発揮される。 Therefore, the function of the rearwardly inclined lower surface portion 2C of the ship bottom portion 2 is exhibited satisfactorily. Even if the weight sinks to the transom portion 3, the transom portion 3 is of course tilted backward, and the water flow is generated not only on the surface of the water, so the bottom surface of the bottom portion 2 is always tilted backward. The function of the part 2C is exhibited satisfactorily.

符号10は握持部、11は握持ロープ、12はオール固定部、13は連結環である。 Reference numeral 10 is a gripping portion, 11 is a gripping rope, 12 is an oar fixing portion, and 13 is a connecting ring.

本実施例は上述のように構成したから、水上にて船体後方から水流を受けた場合、水流は船底部２の後方傾斜下面部２Ｃから下方へ潜り込むように流れて平坦下面部２Ｂ及び前方傾斜下面部２Ａへと抜けていく。この際、水流の流れ方向に対して傾斜する後方傾斜下面部２Ｃで水流を受けることで船体後部（船尾部）に浮力が生じることも相まって水流の前方への抜けが良好に行われる（図７，８参照）。 Since this embodiment is constructed as described above, when a water stream is received from the rear of the hull on the water, the water stream flows downward from the rearwardly inclined lower surface portion 2C of the ship bottom 2, and the flat lower surface portion 2B and the forwardly inclined lower surface portion 2B are formed. It passes through to the lower surface portion 2A. At this time, buoyancy is generated in the rear part of the hull (stern part) by receiving the water flow at the backward inclined lower surface portion 2C that is inclined with respect to the flow direction of the water flow. , 8).

よって、本実施例によれば、前述した従来例に比し、船体後方から水流を受けている状況において減速させ易く、また、停止させた状態を保持し易いなど、良好な使用状態が得られることになる。 Therefore, according to the present embodiment, compared with the above-described conventional example, it is easy to decelerate when receiving water flow from the rear of the hull, and it is easy to maintain a stopped state. It will be.

また、本実施例は、後方傾斜下面部２Ｃの上り傾斜角度は２５度～３５度に設定されているから、前述した作用効果を確実に奏することになる。 In addition, in this embodiment, the upward inclination angle of the rearwardly inclined lower surface portion 2C is set to 25 degrees to 35 degrees, so that the above-described effects can be achieved without fail.

また、本実施例は、前方傾斜下面部２Ａの長さは船底部２全長の３０～４０％、後方傾斜下面部２Ｃの長さは船底部２全長の１０～２０％に設定されているから、この点においても前述した作用効果を確実に奏することになる。 Further, in this embodiment, the length of the forward inclined lower surface portion 2A is set to 30 to 40% of the total length of the bottom portion 2, and the length of the rearward inclined lower surface portion 2C is set to 10 to 20% of the total length of the bottom portion 2. Also in this respect, the above-described effects can be reliably achieved.

また、本実施例は、トランサム部３は後方倒れ傾斜状態に設けられ、このトランサム部３の後方倒れ傾斜角度は、鉛直から１０度～２０度に設定されているから、この点においても前述した作用効果を確実に奏することになる。 In addition, in this embodiment, the transom portion 3 is provided in a rearward tilting state, and the rearward tilting angle of the transom portion 3 is set to 10 to 20 degrees from the vertical. The action and effect can be reliably exhibited.

また、本実施例は、水上に浮かべた場合、トランサム部３と後方傾斜下面部２Ｃとの境界が水面よりも上となるように浮力が設定されているから、この点においても前述した作用効果を確実に奏することになる。 In this embodiment, the buoyancy is set so that the boundary between the transom portion 3 and the rearwardly inclined lower surface portion 2C is above the surface of the water when floating on water. will surely play.

また、本実施例は、船底部２の下面には、該船底部２の前端部から後端部まで延設される縦断面逆Ｖ字状の凹溝部４が船体幅方向に間隔を介して複数並設され、この凹溝部４は、左右の浮き胴部１，１と船底部２との境界部夫々に設けられる外側凹溝部４Ａと、この外側凹溝部４Ａ間に設けられる内側凹溝部４Ｂとで構成され、更に、外側凹溝部４Ａは内側凹溝部４Ｂより深い凹溝部４であるから、この点においても前述した作用効果を確実に奏することになる。 Further, in this embodiment, on the lower surface of the ship bottom portion 2, concave groove portions 4 having an inverted V-shaped vertical cross section extending from the front end portion to the rear end portion of the ship bottom portion 2 are provided at intervals in the width direction of the ship body. A plurality of grooves 4 are arranged side by side, and are composed of outer grooves 4A provided at respective boundaries between the left and right floats 1, 1 and the ship bottom 2, and inner grooves 4B provided between the outer grooves 4A. Furthermore, since the outer groove portion 4A is a groove portion 4 deeper than the inner groove portion 4B, the above-described effects can be achieved reliably in this respect as well.

また、本実施例は、左右の浮き胴部１，１の後端部１ｂ，１ｂは錐形状であるから、この点においても前述した作用効果を確実に奏することになる。 In addition, in this embodiment, the rear ends 1b, 1b of the left and right floating body portions 1, 1 are conical, so that the above-described effects can be reliably achieved in this respect as well.

また、本実施例は、左右の浮き胴部１，１及び船底部２は内部に気体が充填される中空構造体であるから、船体が軽くて搬送し易く、折り畳んで収納が可能なため保管に便利であるなどの作用効果を奏することになる。 In addition, in this embodiment, since the left and right floating body parts 1, 1 and the ship bottom part 2 are hollow structures filled with gas, the ship body is light and easy to transport, and can be folded and stored for storage. It is convenient for the user.

尚、本発明は、本実施例に限られるものではなく、各構成要件の具体的構成は適宜設計し得るものである。 It should be noted that the present invention is not limited to this embodiment, and the specific configuration of each component can be appropriately designed.

１浮き胴部
１ｂ後端部
２船底部
２Ａ前方傾斜下面部
２Ｂ平坦下面部
２Ｃ後方傾斜下面部
３トランサム部
４凹溝部
４Ａ外側凹溝部
４Ｂ内側凹溝部 REFERENCE SIGNS LIST 1 float section 1b rear end section 2 ship bottom section 2A forward inclined lower surface section 2B flat lower surface section 2C rearward inclined lower surface section 3 transom section 4 concave groove section 4A outer concave groove section 4B inner concave groove section

Claims

A boat having left and right floating trunk portions having a predetermined length rearward from the front of the hull, a bottom portion provided between the left and right floating trunk portions, and a transom portion provided at the rear end of the bottom portion. The lower surface of the bottom of the ship includes a forwardly inclined lower surface portion that is downwardly inclined rearward from the bow portion, a flat lower surface portion connected to the rear end of the forwardly inclined lower surface portion, and a rear end of the flat lower surface portion. and a rearwardly sloping lower surface portion that is continuously connected to the transom portion and that slopes upward to the transom portion.

2. A boat according to claim 1, wherein an upward inclination angle of said rearwardly inclined lower surface portion is set to 25 degrees to 35 degrees.

The boat according to any one of claims 1 and 2, wherein the length of the forward inclined lower surface portion is 30 to 40% of the total length of the bottom portion, and the length of the rearward inclined lower surface portion is 10 to 40% of the total length of the bottom portion. A boat characterized by being set at 20%.

A boat according to any one of claims 1 to 3, wherein said transom portion is provided in a backward tilted state.

5. The boat according to claim 4, wherein the rearward inclination angle of the transom portion is set to 10 degrees to 20 degrees from the vertical.

The boat according to any one of claims 1 to 5, wherein the buoyancy is set so that the boundary between the transom portion and the rearwardly inclined lower surface portion is above the water surface when floating on water. Boat featuring.

7. The boat according to any one of claims 1 to 6, wherein a plurality of recessed grooves extending from the front end to the rear end of the ship bottom are provided on the lower surface of the ship bottom at intervals in the width direction of the ship. A boat characterized by being arranged side by side.

8. A boat according to claim 7, wherein said concave groove has an inverted V-shaped longitudinal section.

9. The boat according to claim 7, wherein said grooves are provided between said outer grooves provided at respective boundaries between said left and right floating trunks and said ship bottom, and between said outer grooves. A boat characterized by comprising an inner concave groove portion formed by

10. A boat according to claim 9, wherein said outer groove is deeper than said inner groove.

A boat according to any one of claims 1 to 9, wherein the rear ends of the left and right floating trunks are cone-shaped.

12. The boat according to any one of claims 1 to 11, wherein said left and right floating body portions and said bottom portion are hollow structures filled with gas.