JPH03139490A - Ship body structure for jet propulsion small boat - Google Patents

Abstract

PURPOSE:To facilitate adjustment of buoyancy and freely change the contour, the shape, and specifications of a ship body by mounting plural skin-segments to the peripheral part of a power train equipped with a jet propeller device so that the skin-segments can be freely loaded and unloaded, and replaced. CONSTITUTION:In a ship structure consisting of a power train unit U previously equipped with a jet propeller device 14 driven through an engine 12 and a propeller shaft 13, and plural skin-segments for giving buoyancy to the power train unit U, at least four skin-segments consisting of a front skin-segment 19a, a pair of right and left side skin-segments, and a top skin-segment 21a are mounted to the peripheral part of the power train unit U serving as a common skeleton so that these skin-segments can be freely loaded and unloaded, and replaced. At this time, a control device 24 is adapted to be mounted to the front skin-segment 19a, and a floor deck, etc. are adapted to be previously mounted to the top skin-segment 21a, and plural segments which are different from each other in the size and shape, and accessories, are interchangeably mounted to improve quantity production.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to the hull structure of a small jet-propelled watercraft that glides on the surface of water.

<Prior Art> In general, small jet-propelled boats that glide on the water surface with one operator standing on the floor deck of the boat or several people hanging on the seats of the boat are known. However, the hull is typically integrally molded from a material such as fiber-reinforced plastic (FRP) into an overall hollow, enclosed float structure.

<Problem to be solved by the invention> Therefore, even if the boat hull is only partially damaged, the entire boat must be replaced with a new one, resulting in expensive expenses for the user. .

In addition, it is up to the user or dealer to change the outline of the hull, or to change specifications between standing and sitting types, depending on the user's operating skill level and preferences. It is impossible to carry out the process at a later stage, and it is still inconvenient and is not suitable for mass production.

<Problems to be Solved by the Invention> The present invention aims to improve the above-mentioned problems, and for this purpose, the hull structure of this type of small jet propulsion watercraft has the following features:
It consists of a power train unit pre-equipped with an engine and a jet propulsion device driven by the engine via a propeller shaft, and a plurality of skin segments that provide buoyancy to the power train unit, and the above power train unit is common. The structure is characterized in that the outer skin segments are detachably and replaceably assembled and integrated into the peripheral part of the frame.

<Function> According to the above configuration, multiple skin segments that are prone to tearing in advance due to the variety of products that vary in size, contour shape, equipment, etc. are transferred to the periphery of the power train unit that serves as the common skeleton. By assembling them interchangeably, the overall completed form of the hull and its specifications can be changed at will, and it is possible to respond to the user's operating skill level and preference, reducing production selection and cost. It is also effective for down.

In addition, the powertrain unit that forms the framework is also given buoyancy as a boat by the multiple skin segments assembled to it, so the degree of buoyancy can also be adjusted by the skin segments. It can be said that it can be done.

<Example> Hereinafter, the specific structure of the present invention will be described in detail based on the illustrated example. The figures also show different hull specifications for passenger riding, where (U) is a rigid power train unit that forms the skeleton of the hull (M), and its unit frame (11) is lightweight. It is manufactured from materials such as alloys and plastics reinforced by composites with various fibers.

Reference numeral (12) is an engine housed at the front of the elongated, substantially prismatic unit frame (11), and includes not only the engine itself but also its auxiliary equipment. (13) is a propeller shaft transmission-coupled to the engine (12) of the unit frame (11).
), and extends along its longitudinal centerline, and is equipped with a jet propulsion device (water jet pump) (14) at its rear end.

That is, the jet propulsion device (14) is driven by the engine (12) mounted on the unit frame (11) via the propeller shaft (13), and propulsion force is given to the boat body (M). At the same time, these so-called propulsion power systems are pre-equipped as a whole unit on its dedicated unit frame (11) as shown in FIGS. 3 to 5.

(15) shows the water inlet opened on the bottom of the unit frame (11), and (16), (17), and (18) show the propeller, pump case, and steering nozzle that form the jet propulsion device (14), respectively. .

On the other hand, (19a) (19b) ~(21a) (21
b) is a plurality of skin segments substantially surrounding the entire powertrain unit (U) excluding the jet propulsion device (14) and the water intake (15), each of which is made entirely of fiber-reinforced plastic material; By molding the power train unit 1-(U) into a hollow sealed float structure, it is possible to provide the power train unit l-(U) with buoyancy as a boat body (M).

Moreover, it is the front skin segments (19a) (19b) of the powertrain unit (U) and the left and right
It consists of at least four pieces in total, including paired side skin segments (20a) (20b) and top skin segments (21a) (21b). It is designed to be removably and replaceably assembled and integrated via l-(22) or other suitable fixing means. Of course, a waterproof structure (not shown) is interposed on the mutual assembly surface.

As suggested by the comparison between the hull specifications of Figures 1 to 10 and the different hull specifications of Figures 11.12, the skin segments (19a) (19b) to (21a) (21
A plurality of units b) are prepared in advance as a wide variety of products with varying sizes, contours, equipment, etc., and with the power train unit (U) as a common framework,
By being interchangeably assembled and used around the unit frame (11), it is possible to complete boat bodies (M) with various specifications.

In this regard, in the hull specifications shown in Figures 1 to 10, the front skin segment (21a) forms a floor deck (23) on which one of the Tikf personnel stands, and the front skin segment (19a) also forms a floor deck (23) on which one of the Tikf personnel stands. is equipped with a control device (24) for raising and lowering operations around its horizontal axis (25), whereas in the alternative hull specification of Figure 11.12, its top skin segment (21b) is equipped with a seat (26) for several people to sit on, and a control device (24) is also installed from the front skin segment (19b).
are erected so that they cannot be raised or lowered, and their corresponding outer skin segments (19a) (19b) (21a)
(21b) can be used interchangeably, and the power train unit (
By assembling the unit frame (11) in U) to a common mount wall surface, the above two types of boat body specifications can be obtained, but this is just an example.

Therefore, for example, when completing the hull to the specifications shown in Figures 1 to 10, a plurality of skin segments (19a) (1
9b) ~(21a) By replacing (21b) with another item with a different outline, the one-person standing riding specification can be maintained as it is, but a hull with a different overall shape (M
), and can be widely adapted to the skill level and preferences of the pilot.

As suggested from FIG. 6, this can be achieved by, for example, forming the top skin segments (21a) and (21b) into finely divided pairs as left and right pairs, and also forming the front skin segments (19a) and (+9b) as a pair of upper and lower parts. subdivide or even side skin segments (20a) (2
It can be said that by forming 0b) from several pieces in the front and back, it is possible to obtain a boat body (M) with a wide variety of layers.

Other symbols (27) are the fuel tanks built into the front skin segments (19a) (19b), (28) are the opening/closing hood of the engine (12), and (2)
9) Misao! The steering cables connecting the handle lever (30) of the +1'A 7B (24) and the steering nozzle (18) of the jet propulsion bag Z (14) are shown, but various of the above-mentioned propulsion power systems When the hull (M) is fully assembled, the auxiliary machinery and accessories shall be functionally connected to the power system and perform their respective functions without any hindrance.
Needless to say.

<Effects of the Invention> As described above, the hull structure of the small jet propulsion watercraft according to the present invention particularly includes the engine (12) and the jet propulsion device 2 (driven by the engine via the propeller shaft (13)). 14) and a plurality of outer skin segments (19a) (19b) to (21a) that provide buoyancy to the powertrain unit (U).
) (21b), and using the power train unit (U) as a common skeleton, the outer skin segment (19a) (19
b) ~ (21a) (21b) are assembled and integrated in a detachable and replaceable manner, so the outer skin segment) (1
9a) (19b) to (21a) (21b) By preparing in advance a variety of products with varying sizes, contours, equipment, etc., the overall shape of the hull (M) and The specifications can be freely modified, and the problems of the prior art described at the beginning can be easily solved, and the invention is also extremely superior in marketability and mass production.

Moreover, the above-mentioned outer skin segments (19a) (19b) to (
21a) (21b) is molded from fiber-reinforced plastic material into a hollow, sealed float structure, which allows the power train unit (U
) is now given buoyancy as the hull (M), which not only streamlines the design of the hull (M) but also improves its outer skin segments (19a) (19b).
~(21a) (21b) has the effect that the buoyancy can be easily adjusted.

[Brief explanation of the drawing]

Figures 1 to 10 show a small boat with a hull that can be used while standing. Figures 1 and 2 are side and plan views, and Figure 3
．． Figure 4 is a slope view and a plan view showing the power train unit extracted, Figure 5 is a sectional view taken along line 5-5 in Figure 4, Figure 6 is a front sectional view showing the disassembled state of the outer skin segment, and Figure 7. is a side sectional view of the completed state with the skin segments assembled;
Figure 8 is a cross-sectional view of the 7th ryJ taken along line 8-8, Figures 9 and 10 are enlarged cross-sectional views taken along lines 9-9 and 10-10 in Figure 7,
FIG. 11 is a plan view showing a small boat with a different hull specification for seating, and FIG. 12 is a sectional view taken along the line 12-12 in FIG. 11. (11) ・ ・ (12) ・ ・ (13) ・ ・ (14) ・ ・ (19a) (19b) (20a) (20b) (21a) (21b) (23) ・ ・ ・ (24) ・ ・ ・(26) ・ ・ ・ (M) ・ ・ ・ (U) ・ ・ ・

Claims (1)

[Claims] 1. An engine (12) and a jet propulsion device (14) driven by the engine via a propeller shaft (13).
A power train unit (U) pre-equipped with
21b), with the power train unit (U) as a common skeleton, and the outer skin segments (19a) (19b) surrounding the power train unit (U).
) to (21a) and (21b) are assembled and integrated in a detachable and replaceable manner. 2. A plurality of outer skin segments (19a) (19b) - (2
1a) (21b), its power train unit (U
) front skin segments (19a) (19b);
Pair of left and right side skin segments (20a) (20b)
and a top skin segment (21a) (21b), the front skin segment (19a) (19b) having a control device (24), the top skin segment (21a)
(21b) has a floor deck (23
2. The hull structure of a small jet propulsion watercraft according to claim 1, characterized in that the jet propulsion type small watercraft is equipped with a seat (26) for sitting on the boat.