JPS59199387A - Small-sized boat - Google Patents

Abstract

PURPOSE:To shift the center of gravity of a small-sized boat in accordance with the weights of crew-members and cargo, to secure/the buoyancy and strength/thereof and thereby to ensure the stable steaming, by arranging a lower opening for water filling, an upper opening for ventilation and a buoyant body for partitioning a vacant chamber in the vacant chamber provided on the double bottom of the boat. CONSTITUTION:When a crew-member is only one and cargo is little, a rubber plug of each draft pipe 15 is removed so as for the pipe to communicate with the outside air. Then air in a vacant chamber R goes out, and water flows into the chamber R through an opening 13 of a hull 11. The water flowing in through the opening 13 is distributed to the right and left sides of the vacant chamber R on the occasion, since a buoyant body 14 disposed in the chamber R is positioned in the central part of the front section 10 of a small-sized boat B, and thus the water can be let in without impairing the stability of the boat B. When the water flows in to the full, the opening at the upper end of each ventilation pipe 15 is closed by the rubber plug so as to prevent the water in the vacant chamber R from going out and thereby to secure the stabilized state of the boat. When there are many crew-members and much cargo, they can be carried without removing the rubber plugs. The buoyant body 14 reinforces the small-sized boat B, increasing the buoyancy without impairing the property of light weight, since it is made of foamed styrol.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to small ships, especially those made of fiber reinforced plastic (FRP).
This relates to a small boat that is lightweight.

Conventional ships made of this type of FRP are used in large quantities because they are lightweight and can be manufactured easily, but the advantage of being lightweight can sometimes turn into a disadvantage. In other words, being lightweight means that the center of gravity is high, which poses concerns in terms of the stability of the ship. In other words, even if there is no problem when carrying heavy cargo or a large number of people, the state of the ship becomes extremely unstable when there is only one crew member despite the large buoyancy. To deal with this,
Conventionally, the required amount of sandbags has been loaded onto a ship, or heavy objects have been attached to the ship in advance when the ship is being manufactured.

However, using sandbags naturally means that the heavy sandbags must be loaded and unloaded from time to time, which is hard work. Moreover, if heavy objects are attached in advance, it is natural that it will be a considerable amount of hard labor when pulling the ship to shore.

The present invention was made in order to deal with the above-mentioned problems, and its purpose is to maintain the advantage of reducing the weight of FRP ships while allowing the ship to be built freely according to the number of cargo or crew members. To provide a small boat that can always run in a stable state by changing its center of gravity.

That is, in the present invention, a hollow chamber is formed in the bottom of the ship by doubling the bottom of the ship, an opening is provided in the bottom of the ship through which water flows into the hollow, and a ventilation pipe communicating with the empty chamber is connected to the top of the hull. It is a small ship characterized by its opening.

An embodiment of the present invention will be explained below with reference to the drawings. Figs. 1 and 2 show a plan view and a side view of a small boat (B) according to the present invention, and this small boat (B) is It is large enough to accommodate 2 to 3 people. This small boat (B) is made of FRP and is divided into two parts, with the front part (
lO) and a posterior part (20). As shown in FIG. 3, these front part (lO) and rear part (20) are each formed into a box shape so that they can float independently on the water. (See Figures 7 and 8) The front part (10) includes an FRP hull (11) and this hull (11) as shown in Figures 1, 5, and 6.
11) is provided with a bottom plate (12) that doubles the bottom part of the ship. As shown in FIGS. 2 and 5, the bottom (lla) of the hull (11) is formed in a shape similar to that of a conventional ship to reduce water resistance, with an opening (
13) is formed. The bottom plate (12) is formed horizontally so that it is easy to carry people or cargo. , when this bottom plate (12) is adhesively fixed inside the hull (11), the bottom part (1
1a) and the bottom plate (12) to form a predetermined space (R). Furthermore, the bottom (1) of the hull (11)
A buoyant body (14) made of styrofoam or the like is placed in the center between the hull (1a) and the bottom plate (12).
On the side of 1), there are a plurality of ventilation cylinders (1) communicating with the vacant room (R).
5) to (15) are arranged. Therefore, this front portion (lO) is formed as follows. That is, first, the bottom (11a) of the outer hull (11)
) A connecting body made of a flexible material such as a string is adhesively fixed onto the buoyant body (14), and the buoyancy body (14) is tied and fixed by this connecting body.

In this embodiment, the buoyant body (14)
This is because it is difficult to fix directly to the FRP hull (11) with adhesive because Styrofoam is used as the material, and there is no need to do so if there is a better material or method. Next, each ventilation pipe (15) is divided into two on the left and right at the rear, and a tree is installed at the tip, and the hull (
11), and the lower end opening of each ventilation pipe (15) can be opened below the bottom plate (12).
) is placed inside the hull (11), and its edge is placed inside the hull (11).
) with adhesive and fixation using FRP. In addition, each ventilation pipe (15
) Close the opening at the top with a rubber stopper, etc.

Further, as shown in FIGS. 4 and 6, a locking portion (18) is provided at the lower rear surface of the front portion (10) of the small boat CB). This locking part (16) is made of metal and is strong, and forms a small horizontal gap (113a) between it and the hull (11) constituting the front part (10). on the other hand,
A locking piece (26) is provided at the bottom of the entire rear portion (20) of the small boat (B). This locking piece (26) is also made of strong metal, and the gap (
16a) to engage with the locking part (16). Furthermore, the front part (l) of the small boat (B)
As shown in FIG. 6, there is a metal fixing part (17
) and (27) are respectively formed. As shown in FIG. 1, the rear portion (2o) of the small boat (B) in this embodiment is formed so that its width gradually decreases from its front end to its rear end, and its depth is As shown in FIG. 2, the depth is approximately the same as the depth of the forward portion (10) to the bottom plate (12).

In the small boat (B) configured as above, each of the front part (10) and the rear part (20) that make up the boat is as follows:
As illustrated in FIGS. 7 and 8, each can independently function as a ship. Therefore, even if the connection shown in FIG. 7 should be broken during navigation, the front portion (10) and the rear portion (20) will not sink. Further, in the small boat (B) according to the present invention, when there is only one crew member and there is little cargo, the rubber stopper of each ventilation pipe (15) is removed to communicate with the outside air. Then, the air in the empty chamber (R) escapes from each ventilation pipe (15), and at the same time, the hull (11)
Water (or seawater) flows into the cavity (R) from the opening (13). At this time, the buoyant body (1
4) is located in the center of the front part (10) of the small boat (B), so the water flowing in from the opening (13) is evenly distributed to the left and right of the empty space (R), and the small boat Water can be introduced into the cavity (R) without compromising the stability of CB).

After the water has completely flowed into the cavity (R) in this manner, the upper end opening of each vent pipe (15) is closed with a rubber stopper.

This is to prevent the water in the chamber (R) from leaking out while the small boat (B) is navigating, so as not to impair stability. Whether water has completely flowed into the vacant room (R) is determined by
If the crew stays quietly on board the small boat (B) for a while, the boat (B) will stop shaking or the air will no longer flow out of each ventilation pipe (15), causing the sound caused by the air to flow out. You can know by this.

In this way, if water completely fills the empty chamber (R), the center of gravity will be lower than when water does not enter the empty chamber (R), and even if there is only one occupant, the The ship (B) can be operated in a stable state.

Also, if you want to take this small boat (B) ashore, remove the rubber plugs from each vent pipe (15) and slowly pull it up as it is, and the water in the empty room (R) will drain out of the opening (13). ), and by the time it is pulled ashore, it is completely extracted, and the small boat (B) easily returns to its original lightweight state. can be easily lifted onto land. In addition, if there are many passengers and luggage, there is no need to do the above, and it is sufficient to carry people and luggage without removing the rubber plugs of each ventilation pipe (15).

this is,.

This is because the center of gravity of the small boat (B) naturally lowers due to the weight of people and cargo, and it goes without saying that carrying conventional sandbags is a problem.

By the way, in any of the above cases, the buoyant body (1
4) performs the following actions. That is, this buoyant body (14) not only strengthens the front part (10) of the small boat (B) by itself, but also strengthens the front part (10) of the small boat (B).
), it also serves as a platform to strongly hold the bottom plate (12), which tends to be relatively weak, even when carrying people or cargo. Furthermore, since the buoyancy body (14) is made of styrofoam, it does not hinder the purpose of reducing the weight of the small boat (B). In addition, a buoyant body (
14) Because it has buoyancy, this front part (
Even if 10) capsizes and water enters the empty chamber (R), the front part (10) will not be submerged below the water surface, which is useful in an emergency.

The front part (10) and the rear part (20) of the small boat (B) are changed from the separated state shown in FIGS. 3 and 4 to the connected state shown in FIGS. 1 and 7. To do so, do the following: That is, the locking piece (28) attached to the rear part (20) is inserted from above into the gap (16a) formed by the locking part (18) of the front part (10), and the locking piece (26) is inserted into the gap (16a) formed by the locking part (18) of the front part (10). ) and the locking portion (18) are engaged with each other. After that, use bolts, nuts, etc.
The fixing part (17) (2) formed in the image part (to) (20)
7) are strongly connected to each other. This allows small ships (B
) are rigidly connected to each other in the manner shown in FIGS. 1 and 7. Also, if you want to load this small boat (B) onto a vehicle and transport it, you can do the work in the reverse order of the above, and the small boat (B) will be divided as shown in Figure 3. and can be easily transported. in this case,
As shown in the imaginary lines in Figures 1 and 2, the rear part (
2o) can be completely stowed within the front part (10), so that
As for the vehicle, it is sufficient to have a space or place where the front part (1o) of the small boat (B) can be stored.
This small boat (B) also has the advantage of reducing the limitations of vehicles that can transport it.

The rear portion (20) of the small boat (B) according to the present invention may carry people or cargo, or an outboard motor may be attached to the rear portion (20).

Furthermore, if the rear part (20) is used to store fish, it is possible to meet the demand of people who enjoy fishing, which has increased in recent years.

As described in detail above, in the present invention, as exemplified in the above embodiment, a void (R) is formed in the bottom of the small boat (B) by making the bottom of the boat (B) double. R
) to allow water (seawater) to flow into the hull (1).
1), and the ventilation pipe (15) that communicates with the empty room (R) is opened at the top of the hull (11). To provide a small boat capable of freely changing its center of gravity and always navigating in a stable state. In addition, since the buoyancy body (14) is provided in the empty room (R), it is possible to ensure the buoyancy of the hull itself and maintain the strength of the hull at the same time.
It is possible to provide a small boat that can evenly flow water into R).

[Brief explanation of the drawing]

FIG. 1 is a plan view of a small boat according to the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a perspective view of the small boat in an uncoupled state.
Figure 4 is a perspective view as seen from the opposite direction to Figure 3, Figure 5 is a vertical sectional view taken along line V-V in Figure 1, and Figure 6 is a partial vertical sectional view showing the connecting part of a small boat. , FIG. 7 is a diagram of how the connected small boats are used, and FIG. 8 is a diagram of how only the front portion of the small boat is used. Explanation of the code B...Small ship, lO...Forward part, 11...
Hull, 12... Bottom plate, 13... Opening, 14
... Buoyancy body, 15... Ventilation pipe, 16... Locking part, 17... Fixed part, 20... Rear part, 2
6... Locking piece, 27... Fixed part patent applicant Hiroyasu Fukunaga Agent Patent attorney Takenori Hiroe (Agent reference number 4-1800)

Claims (1)

[Scope of Claims] l) A hollow chamber is formed in the bottom of the ship by doubling the bottom of the ship, and an opening is provided in the bottom of the ship to allow water to flow into the hollow, and a ventilation pipe communicating with the hollow is provided. A small ship characterized by an opening at the top of the hull. 2) The small boat according to claim 1, characterized in that a buoyant body that partitions the empty space is arranged and fixed within the empty space.