JP2826273B2 - Small planing boat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a personal watercraft having a double hull comprising an outer hull and an inner hull.

[0002]

2. Description of the Related Art In a personal watercraft, an upper deck is joined to a hull that constitutes a lower part of a hull. Conventional hulls are generally of a single-plate type (design registration No. 4).
49793). Due to structural requirements, such as increasing the strength of the hull and creating a sealed buoyancy chamber to ensure the buoyancy of the hull in the event of inundation, some hulls have an internal / external dual structure. This hull comprises an outer hull forming the outer shape of the lower part of the hull and an inner hull joined to the inner surface of the outer hull. The inner hull is formed by adding a core to the inner surface of the outer hull. In the form of a hand lay-up.

[0003]

As described above, the conventional double-structure hull is a system in which a core material is added, so that it takes time and effort to prepare the core material, and furthermore, it requires a hand lay-up. For this reason, the workability of creating the internal hull is poor, and there is also a disadvantage that an unnecessary core material remains as it is after the creation.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and does not require the production of a core material and the work of adding it to an internal hull, and can reduce the weight without leaving the core material after the hull is produced. The purpose is to provide.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the invention according to claim 1 comprises an outer hull which is molded to form an outer shape of a lower part of a hull, and an outer hull which is molded to form the outer hull.
An inner hull facing only the bottom wall, the inner hull protruding inward and extending in the front-rear direction , and the outer hull on both sides.
The hull has a rib joined to the inner surface of the bottom wall .

According to a second aspect of the present invention, in the first aspect, a deck is joined to an upper portion of the outer hull, and a projecting end of a rib of the inner hull is joined to the deck.

[0007]

[0008]

According to the first aspect, the outer hull and the inner hull are respectively formed by molding, and the inner hull is formed by:
It protrudes inward and extends in the front-rear direction , and the outer
Since the ribs are joined to the inner surface of the bottom wall of the hull, the hull strength is improved. Further, not only is it unnecessary to prepare the above-mentioned core material, but also it is not necessary to add the same core material at the time of forming the internal hull, so that the work becomes easy. In addition, there is no possibility that the core material remains on the hull to increase the weight.

According to the second aspect of the present invention, the inner hull rib is provided on the deck .
Since the protruding ends are joined, the deck is reinforced by the ribs .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. In FIG. 1, the personal watercraft is formed by joining an upper resin deck D and a lower resin hull H to each other. The deck D has a two-seater boarding seat 2 behind the handlebar 1 at the upper center. As shown in FIG. 5, which is a cross section of the vicinity of the boarding seat 2, the deck D is provided with step portions S on both sides of the seat table 15 on which the feet of the rider are placed. A flange 4 is provided.

On the other hand, the hull H includes an outer hull 20 forming an outer shape of a lower part of the hull, and an inner hull 30 joined to an inner surface of the outer hull 20, as shown in a separated state in FIG.
Both of the hulls 20 and 30 are made of a molded resin.

The outer hull 20 is provided with an outer edge flange 21 over the entire circumference, and is joined to the flange 21 so as to cover the outer edge flange 4 of the deck D as shown in FIG. At the rear center of the outer hull 20, as shown in FIG. 4 which is a longitudinal sectional view of a main part, a duct portion 22 is integrally formed as a diagonally rearwardly rising concave portion. The machine accommodating portion 23 is integrally formed as a rectangular recessed portion. The propulsion device storage section 23 contains the propulsion device 3
A metal pump case 24 serving as an outer shell of FIG. 1 and a pump cover 25 that covers a lower portion thereof and forms a part of an outer surface of a ship bottom are attached.

As shown in FIG. 2, the inner hull 30 has outer ribs 31 protruding inward (upward) and extending in the front-rear direction on both left and right sides. The cross section is trapezoidal, as shown in FIG. 5, and the step S of the deck D is joined to the upper wall. The junction is shown as a dotted area in FIG. The hatched portion in FIG. 3 indicates a joint portion between the external hull 20 and the internal hull 30 by adhesion.

As shown in FIG. 2, an inner joint 32 and an outer joint 33 are provided on the inside and outside of each outer rib 31 of the inner hull 30, and these joints 32, 33 are formed as shown in FIG. As shown in FIG. 7, the outer hull 20 is joined by bonding along the inner surface of the bottom wall 20a. Here, the outer joint 33
Does not extend to the side wall 20b of the outer hull 20, but is kept short for weight reduction. Therefore, the inner hull 30 is
Of the bottom wall 20a of the screw 20 only.

The bow 34 of the internal hull 30 shown in FIG.
The outer hull 20 is joined to the outer edge flange 21 as shown by hatching in FIG. Also, the internal hull 3 in FIG.
The zero stern 35 is joined on the stern 26 of the outer hull 20 as shown by hatching in FIG. further,
As shown in FIG. 4, a support box 36 for inserting and supporting the propulsion shaft 6 from the engine 5 with the bearing 7 is formed at a rear portion of the inner hull 30. The outer peripheral hull 20 is joined to the outer hull 20. The joining portion is indicated by hatching in FIG. Thus, the support box 3
A buoyancy chamber 38 composed of a closed space is formed between the outer hull 6 and the duct portion 22 of the outer hull 20.

Further, as shown in FIG.
A front recess 39 and a rear recess 40 are formed via a first horizontal rib 41 at the front portion of each of them. As shown by hatching in FIG. 40
a is joined to the outer hull 20. A second lateral rib 42 is formed on the rear side of the rear recess 40.

The first and second horizontal ribs 41, 42
Are provided with a pair of mounting portions 45, respectively, and each mounting portion 45 is provided on the lower surface (back surface) of the lateral ribs 41 and 42 as shown in FIG. A nut 46 is inserted into the boss 45a and fixed with an adhesive 47. A fuel tank (an example of a load) 8 shown in FIG. 4 is fixed to these mounting portions 45.
The fuel tank 8 is set in a rear recess 40, and a mounting portion 45 hangs a band 9 on the tank 8, and a tip metal fitting 10 is fixed to the mounting portion 45 with a bolt 11.

Inside the outer hull 31 of the inner hull 30 shown in FIG. 2, a pair of left and right inner ribs 48 which are connected to the second lateral rib 42 and extend longitudinally forward and backward are provided. A plurality of mounting portions 50 are arranged on the upper surface of each inner rib 48 in the front and rear direction, and the mounting portions 50 have nuts in bosses 50a provided on the lower surface of the inner rib 48 as shown in an enlarged cross section in FIG. 51 is inserted and is embedded and fixed with an adhesive 47. As shown in FIG. 4, these mounting portions 50 connect the engine (an example of a mounted object) 5 to the internal hull 3 by bolts 11.
0, that is, for fixing to the hull.

Further, a plurality of mounting portions 53 of an adhesive nut type having a structure similar to that shown in FIG. 6 are also arranged on the support box 36 at the rear portion of the inner hull 30 as shown in FIG. The electrical component box 12 of FIG. 4 is fixed.

In the above configuration, the outer hull 20 and the inner hull 30 of FIG. 2 are respectively formed by molding, and the inner hull 30 includes the outer rib 31 and the inner rib 48 which protrude inward and extend in the front-rear direction. Hull H
The strength of is improved. In addition, it is not necessary to prepare a core material as in the prior art, and it is not necessary to add a core material at the time of forming the internal hull, so that the work becomes easy. In addition, since the core material does not remain on the hull, measurement is realized.

Since the outer rib 31 of the inner hull 30 is joined to the deck D, the deck D is reinforced by the outer rib 31. In addition, the engine 5,
Attachment parts 45, 50,
Since the 53 is formed, the load applied to the mounting portion is applied to the inner hull 30 and is not directly applied to the outer hull 20, so that the durability of the outer hull 20 is improved.

Further, the bosses 45a, 50a and the adhesive nuts 46, 51 constituting the mounting portions 45, 50, 53 are
Since it is provided on the back side of the inner hull 30, that is, on the joint surface side with the outer hull 20, the mounting portions 45, 50, and 53 do not protrude into the ship.
There is no danger of the surrounding load coming into contact with 3.

Further, since the closed buoyancy chamber 38 is formed by the support box 36 of the inner hull 30 and the outer hull 20, it contributes to generating buoyancy.

In the above embodiment, the outer hull 20, the inner hull 30, and the deck D are made of resin. However, a part or all of them may be made of light metal such as aluminum and formed by molding.

[Brief description of the drawings]

FIG. 1 is a right side view showing a personal watercraft according to one embodiment of the present invention.

FIG. 2 is a perspective view showing the outer hull and the inner hull of the embodiment in a separated state.

FIG. 3 is a plan view showing a state of connection to an outer hull and a deck based on the inner hull of the embodiment.

FIG. 4 is a longitudinal sectional view showing a mounted state of a tank, an engine and the like of the embodiment.

FIG. 5 is a cross-sectional view showing a joint structure between an external hull and an internal hull near an engine mounting portion in the embodiment.

FIG. 6 is an enlarged sectional view showing an example of an adhesive nut method.

FIG. 7 is an enlarged sectional view showing another example of the adhesive nut method.

[Explanation of symbols]

D: deck, H: hull, 5, 8: mounted, 20: outer hull, 30: inner hull, 31: rib, 45, 50, 53 ...
Mounting part.

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B63B 5/24 B63B 35/73

Claims (2)

(57) [Claims] 1. An outer hull which is molded to form an outer shape of a lower part of a hull, and which is formed only by a bottom wall of the outer hull .
And an inner hull facing inward, the inner hull protruding inward and extending in the front-rear direction , and
A personal watercraft comprising a dual structure hull having ribs joined on both sides to an inner surface of a bottom wall of the outer hull. 2. The personal watercraft according to claim 1, wherein a deck is joined to an upper portion of the outer hull, and a projecting end of a rib of the inner hull is joined to the deck.