JPH06321171A - Catamaran - Google Patents

Abstract

PURPOSE:To suppress the penetration and shock of wave to a hull, respectively, and improve the stability at stormy weather by arranging beam sea resisting parts extended upward on the outside parts of a lateral pair of floats connected to each other by a deck, and arranging stair-like wave extinguishing parts on the beam sea resisting parts. CONSTITUTION:A catamaran A is formed by connecting a lateral pair of floats 1 to each other by a deck 2. Each float 1 has, for example, a V-shaped bottom part, and the outside part of a body part 10 is extended upward to form a beam sea resisting part 11. The inside of the beam sea resisting part 11 is constituted in such a manner as to be capable of draining, and a stair-like wave extinguishing part 12 (i, ii, iii) is formed on the outside surface of the beam sea resisting part 11. On the other hand, a notched sectional wave extinguishing part 20 is formed on the bottom part of the deck 2. Further, rotatable partitioning boards 3 which can be supported by the beam sea resisting parts 11 are arranged on both side parts of the upper part of the deck 2. Thus, a wave is shielded by the beam sea resisting part 11, the wave is immediately discharged even when penetrated, and the shock of the wave is moderated by the wave extinguishing part 12.

Description

Detailed Description of the Invention

[0001]

[Object of the Invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catamaran having a pair of left and right floats connected and fixed by a deck.

[0002]

BACKGROUND OF THE INVENTION Conventional catamaran boats (1) can reduce the wave-making resistance by interfering with the waves produced by each float.
(2) The stability is better than the monohull type, and the structural part that connects the catamaran can be widely used.
Because of its advantage, it is widely used mainly for small boats. However, although this catamaran is good when the waves are calm, there is a strong problem that the float's draft changes greatly during rough weather, impairing its stability and the hull cannot withstand the rough waves. In the case of a light catamaran as a pleasure boat, it is manually restored in the event of a capsize, but it is stable under normal conditions, so it is stable even in the capsized state, and it tries to maintain that state strongly. Because of this, restoration is extremely difficult.

[0003]

[Technical Items Attempted to Develop] The present invention has been made in view of such a background, and is an attempt to develop a catamaran excellent in stability even in stormy weather.

[0004]

[Constitution of the invention]

[Means for Achieving the Object] That is, the first invention of the catamaran according to the present application is a boat in which a pair of left and right floats are connected and fixed to each other by a deck, and the float has a transverse wave-resistant portion whose outer portion extends upward. It is characterized in that it is provided, and the inside of the transverse wave resistant portion of the float is configured to be drainable.

A second invention of the catamaran according to the present application is
In addition to the above requirements, the transverse wave resistant portion has a wave canceling portion formed in a staircase shape.

Further, in addition to the above requirements, a third invention of the catamaran according to the present application has a wave canceling portion formed in a notched cross section at the bottom of the deck, and a swirling portion at both upper sides of the deck. A partition plate which is movable and can be supported by the transverse wave resistant portion is provided.
The above objects are intended to be achieved by these inventions.

[0007]

Since the float has a transverse wave resistant portion, the wave is prevented from entering between the float and the deck even when the wave is rough, and even if it enters, it immediately propagates inside the transverse wave resistant portion and is drained. It

Further, since the transverse wave-resistant portion has a step-shaped wave canceling portion, the hit waves are repelled and collide with each other to reduce the shock of the waves.

Furthermore, since a wave canceling portion having a notch-shaped cross section is formed at the bottom of the deck, the waves hitting the bottom of the deck are repelled and collide with each other to alleviate the shock of the waves. Furthermore, since the partition plate is rotatably installed, when the wave is calm, it is laid down so that it hits the upper edge of the transverse wave resistant part and used as a seat, while on the other hand, in the case of stormy weather, the partition plate is raised. Even if a wave enters inside the transverse wave resistant part, it prevents the wave from entering the deck, and guides the wave entering the transverse wave resistant part inside the transverse wave resistant part to be drained. To do.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to illustrated embodiments. FIG. 1 shows a catamaran A according to the present invention, which comprises a pair of left and right floats 1, a deck 2 and a partition plate 3 as basic constituent members.

First of all, the float 1 which is one of the characteristic configurations of the present invention is, for example, a V-shaped boat that laterally deflects the shock of waves and has a V-shaped bottom, and the outer portion of the main body 10 is obliquely upward. It has a transverse wave-resistant portion 11 which is curved so as to be curved slightly inward. The outer surface of the transverse wave resistant portion 11 has a wave canceling portion 12 formed in a step shape. The wave-eliminating portion 12 is formed in three stages as an example, and 12i to 12iii are shown when distinguishing each of them.
And the respective horizontal planes are designated as 12a and the vertical planes are designated as 12b. In addition, on the upper part of the wave canceling part 12, the wave blocking part 1
Have three. Of course, the wave canceling portion 12 formed in such a staircase shape may also be formed on the inner surface. As an example of the material of the float 1, FRP, plywood or the like is used as an outer shell member, and the inside thereof is hollow or filled with styrofoam or the like.

A plurality of U-shaped connecting brackets 4 for joining to the deck 2 are provided on both sides of the upper surface of the float 1, and fixed arms 5 are provided in the recesses of the four connecting brackets 4 of the left and right floats 1 in total. Insert, stretch, and fix. The fixed arm 5 alleviates the problem of strength, which is a defect of the catamaran, and of course, the float 1 and the deck 2 are simply fixed and joined without a structural reinforcing member such as the fixed arm 5. I don't care.

Next, the deck 2 will be described. As an example, the deck 2 has a flat plate-shaped upper portion and a bottom portion formed in a notched shape like a saw blade, and acts as a wave canceling portion 20. Further, a seating seat, a cabin, etc. may be appropriately provided on the upper portion. The deck 2 may be manufactured by laminating water-resistant plywood or may be made of an appropriate material such as FRP or the like, but is required to be formed of a light member due to the nature of the catamaran.

Then, the deck 2 and the float 1 are joined at the upper portion of the connection bracket 4 as an example as described above. This connection may be permanently fixed with bolts or the like, or an assembly hole connection method in which the float 1 and the deck 2 have insertion holes, and the connection bracket 4 is inserted therein and fixed with pins or the like. May be taken.

Support posts 21 for supporting the partition plate 3 are provided on the deck 2 at both the bow and stern deck sides.
To provide. As shown in FIG. 3, this has a rotation support hole 22 in the lower part and a lock hole 23 in the upper part.

The partition plate 3 is rotatably supported on the support post 21 downward. The partition plate 3 is, for example, in the shape of a horizontally long rectangular flat plate, has a rotation hole 31 below the short side edge portion, and has a pin receiving hole 32 above. Then, the rotation pin 31 and the rotation support hole 22 are matched with each other to secure the hinge pin 24.
And the partition plate 3 is rotatably held. On the other hand, the pin receiving hole 32 is fixed to the partition plate 3 by inserting the stop pin 25 so as to match the lock hole 23 in a state where the partition plate 3 is raised along the support post 21. As an example, a seat 33 as shown in FIGS. 1 and 2 can be provided on the inner wall of the partition plate 3. Seat 33
In the simplest case, a doglegged plate is installed on the inner wall of the partition plate 3, and when the partition plate 3 is laid down, the seat 3
The seat 33 may be made to function, or the two plates forming the seat 33 may be hinged to be foldable.

The power unit for such a catamaran may be a sail, an outboard motor using an engine or a motor, and a rowing oar or the applicant of the present invention.
The device for rocking the propulsion wings disclosed in No. 156194 “Propulsion device for boats and the like” can be applied.

The present invention has the above-mentioned structure. When using the present invention, first, when the wave is gentle, the stop pin 25 is removed, and the partition plate 3 is tilted to the outside to shield the sea. It is supported by a support portion 14 provided at the tip of the portion 13. At this time, when the seat 33 is provided on the inner wall of the partition plate 3, the seat surface 33a is just horizontal and the user can sit there. On the other hand, when the waves are rough, the partition plate 3 is erected, the lock hole 23 and the pin receiving hole 32 are aligned, the stop pin 25 is inserted, and the partition plate 3 is fixed and used.
It can be used as a handrail as well as preventing the waves from entering the deck 2.

Next, the operation of the transverse wave resistant portion 11 will be described with reference to FIG.
In the case of the normal wave as shown by the solid line in (a), the wave hits about 12i and 12ii of the wave canceling part 12, and when the wave is rough, as shown by the phantom line in FIG. It prevents waves from hitting the deck 2 by hitting the 12iii of 12 and the wave blocking part 13. Especially shear wave resistant part 1
Since 1 is formed to extend sufficiently above deck 2,
Although the waves rarely enter the deck 2, even if the waves enter beyond the transverse wave-resistant portion 11, they immediately propagate inside the transverse wave-resistant portion 11 as shown in FIG. 4B. Float 1
Since the water is drained through the upper part, the stability of the catamaran A is not spoiled at an accelerated rate.

As shown in FIG. 5, the action of the wave canceling portion 12 is such that the wave hitting the horizontal surface 12a and the wave hitting the vertical surface 12b of the wave canceling portion 12 are repelled and collided with each other to reduce the shock of the wave. . As described above, the transverse wave resistant portion 1
1 has a wave-blocking effect and a wave-eliminating effect, which are performed simultaneously during service. The action of the wave-eliminating portion 20 at the bottom of the deck 2 is almost the same as the action of the wave-eliminating portion 12 of the float 1 shown in FIG. 5, and the waves hitting the surfaces facing each other bounce off and collide with each other, so that the shock of the waves is generated. Alleviate.

[Other Examples]

The present invention has the above-described configuration as a basic configuration, but the following modifications are possible. That is, as shown in FIG. 6, the float 1 of the present invention may be formed hollow by FRP so that water W or the like can be injected into the float 1 so that the draft level can be appropriately changed.
That is, when there are many people or luggage, it is not necessary to inject the water W or the like, but when the loading weight is light, the water W or the like is infused to make the boat appropriately heavy and suppress the shaking. is there. Further, a life preserver, luggage, etc. may be put in the hollow float 1 formed of FRP or the like.

Further, as shown in FIGS. 7 to 9, for the catamaran A according to the present invention, Japanese Patent Application No. 4-934 disclosed by the present applicant.
No. 03 “Rebuilding device for ships” can be applied. That is, this device is capable of restoring an overturned boat with a small number of people by a simple operation. Floating bodies 72 are provided on the left and right sides of a boat mast 71, and a lever 73 is provided on the upper surface of the deck 2.
Is provided to the side of the boat so that it can be freely extended. Further, the lever end 73 has a free end side tip end, and a restoring posture maintaining mechanism including a water bag 74 and an auxiliary floating body 75 via a pulley device, and a sea anchor on the bow of the boat. 76 is provided.

When this is used in the above configuration, the capsized boat is selectively supplied with gas to the floating bodies 72 provided on the left and right sides of the mast 71 one by one side, and the floating body 72 is rotated by a certain angle to rotate the boat. It is completely restored by the lever action of the lever 73 that is used by projecting from the lever. Further, at this time, since the pulley device is provided at the power point of the lever 73, the force required to restore the boat is small. Further, the buoyancy of the auxiliary floating body 75 and the weight of the seawater in the water bag 74 protruding from the sea balance the attitude of the restored watercraft. Further, the watercraft restored by the sea anchor 76 provided on the bow turns so that the bow faces in the windward direction, and is maintained with the bow facing in the windward direction.

Furthermore, the catamaran according to the present invention can be constructed and disassembled as disclosed by the present applicant in Japanese Patent Publication No. 3-26070, "Small boat which can be assembled and disassembled". That is, a float 1, a deck 2, a partition plate 3 and the like, which are formed by using FRP or the like as an outer shell member and filling a solid body such as styrofoam with high buoyancy, are divided into several divided constituent bodies for storage or movement. A catamaran that is easy to ride and has a good ride comfort as a boat.

[0025]

EFFECTS OF THE INVENTION The present invention has the above-mentioned structure, and since the outer side portion of the float 1 has the transverse wave-resistant portion 11 formed to extend sufficiently above the deck 2, the waves penetrate the deck 2. Can be prevented. In particular, even when the hull is tilted, the transverse wave-resistant portion 11 is set sufficiently high, so that intrusion of waves can be effectively prevented, and therefore, the limit of the restoring force can be kept high. In addition, even if a wave enters beyond the transverse wave-resistant portion 11, the inside of the transverse wave-resistant portion 11 is configured to be freely drainable, so that further entry of seawater impairs stability at an accelerating rate. There is no. Further, since the wave canceller 12 is provided on the side of the transverse wave resistant portion 11, the impact of the transverse wave on the hull is always alleviated, and a stable posture is maintained.

Further, since the wave canceller 12 is provided at the bottom of the deck 2, the impact of the waves on the bottom of the hull is reduced. Further, since the partition plate 3 is rotatably provided, the partition plate 3 can be tilted to be supported by the float 1 and can be used as the seat 33. On the other hand, when the waves are rough, the partition plate 3 can be raised. It can be used as a handrail as well as preventing waves from entering the deck 2.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a catamaran of the present invention.

FIG. 2 is a skeletal vertical sectional view of the same.

FIG. 3 is a perspective view showing a partition plate and a support post in an exploded manner, and a perspective view showing a state in which the support post is being rotated.

FIG. 4 is a skeletal vertical cross-sectional view showing a difference in a wave canceling action position due to a difference in wave height.

FIG. 5 is a skeleton cross-sectional view showing a state of wave cancellation by a wave canceller.

FIG. 6 is a skeletal vertical cross-sectional view showing changes in draft level when a float is hollow and water is put in the hollow portion and when water is not put in the hollow portion.

FIG. 7 is a front view showing an embodiment in which the catamaran boat of the present invention is provided with a restoring device.

FIG. 8 is a plan view of the same.

FIG. 9 is a front view showing a usage state of the same.

[Explanation of symbols]

 1 Float 2 Deck 3 Partition Plate 4 Connection Bracket 5 Fixed Arm 10 Main Body 11 Transverse Wave Part 12 Wave Elimination Part 12i Wave Elimination Part 12ii Wave Elimination Part 12iii Wave Elimination Part 12a Horizontal Surface 12b Vertical Surface 13 Shield Part 14 Support Part 20 Waves Eraser 21 Support post 22 Rotation support hole 23 Lock hole 24 Hinge pin 25 Stop pin 31 Rotation hole 32 Pin receiving hole 33 Seat 33a Seat surface 41 Connection wall 71 Mast 72 Floating body 73 Lever bar 74 Water bag 75 Auxiliary floating body 76 Seeker A Catamaran W water

Claims (3)

[Claims] 1. A watercraft in which a pair of left and right floats are connected and fixed by a deck, the float is provided with a transverse wave-resistant portion whose outer portion extends upward, and the inside of the transverse wave-resistant portion of the float is drainable. A catamaran characterized by being 2. The catamaran according to claim 1, wherein the transverse wave resistant portion has a wave canceling portion formed in a step shape. 3. The bottom of the deck has a wave canceling portion formed in a notched section, and the upper and lower sides of the deck are provided with partition plates which are rotatable and can be supported by the transverse wave resistant portion. The catamaran according to claim 1 or 2, characterized in that