JPH0999894A - Boat with floating body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent rolling and allow a stable high-speed cruise by fitting a floating body to the outside face section of the hull of a boat capable of cuising by ejecting the water sucked by a propelling pump provided at a bottom section for the cruise. SOLUTION: When a jet pump 3 is driven by a drive motor 2, the water sucked from a suction port 4 is ejected from a discharge port 5, and a boat can cruise. If a mixed flow pump having a spiral centrifugal vane is used for the jet pump 3, a high-pressure water jet can be ejected, no cavitation occurs, and the boat can stably cruise at a high speed. A floating body 6 provided along the broadside floats a hull, mitigates the resistance of waves, widens the boat width, prevents a rolling action, and allows a stable cruise.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-speed planing boat used for salvage and the like, and an object thereof is to provide a boat capable of stably sailing on water at high speed.

[0002]

2. Description of the Related Art Conventionally, a high-speed boat in which a small-sized boat is provided with a high horsepower outboard drive unit as an attachment is well known.
A high-speed watercraft is also known, which is driven by a water jet by a pump instead of a drive by a screw. As the former one to which the high-horsepower outboard motor is attached, one having a hull made of FRP material and one made of a rubber tube are well known. Further, as the latter water jet propelling, for example, Japanese Utility Model Publication 5-39999.
There is an issue. In the device of this invention, water sucked from the bottom of the ship is jetted backward by a pump.

[0003]

However, in the conventional vehicle with a drive unit attached to the outside of the boat, the propeller for propelling must be submerged to a certain depth. Maintaining stability is difficult when running. That is, when traveling toward waves, when the screw is on the wave, the front part of the hull floats in the air, and at this time, the screw propels, so that it progresses forward in an extremely unstable state.

In the latter case where a water jet is used as the propulsive force, the boat runs in a state where it skids on the surface of the water by kicking in a shallow depth, so it is stable in the forward direction, but in the left-right direction, that is, in rolling. On the other hand, it is unstable. For this reason, in the prior art, a propulsion drive machine is installed on the bottom of the ship to lower the center of gravity as much as possible, and the hull cross section is configured in a dharma shape so as to automatically restore to the rolling. Instead, protective equipment such as rubber rings is attached to protect the port side at the shore.

[0005]

According to the present invention, a water jet is adopted as a propulsion means for a boat to mitigate the vertical movement when traveling toward a wave, and for the rolling, the water-saving part is used. A floating body is attached to the to prevent rollover by mitigating the rolling and at the same time, restoring force is added. Furthermore, the floating body protects the port side at the time of berthing or docking with another ship.

That is, the gist of the present invention is that a buoyant body is attached to the outer side surface of a hull in a boat constructed so that a propulsion pump installed in the bottom of the ship ejects water absorbed and travels. It is a thing.

When a mixed flow pump using spiral blades is used as the propulsion pump, a strong propulsive force is obtained and cavitation does not occur, which is more efficient.

Further, if the levitation body is provided on the port side along the waterline of the hull, it is difficult to roll and it is possible to prevent capsizing. If this levitation body is made hollow with rubber tires or the like, it becomes a fender together with levitation. obtain.

The float may be made of Styrofoam. At this time, if the float and the hull are combined and the hull has a dharma cross section, rolling can be alleviated. It is possible to give a restoring force to rolling.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is configured as described above, and its propulsion drive unit is a pump provided at the bottom of the ship, which has a low center of gravity, and this pump jets and ejects water sucked from the bottom of the ship. Since the water absorption reaction force causes the hull to float, it is possible to sail on the water surface in a gliding state. Therefore, it is possible to sail at high speed, and when crossing waves, it is possible to smoothly climb over the mountains of waves and to perform stable sailing. In particular, if a mixed flow pump using spiral blades is used as a driving pump, it is possible to inject a high-pressure water jet and it is more effective as a pump without causing structural cavitation.

Further, since the boat according to the present invention is provided with the levitation body along the water-drain line portion, the boat width is wide and it is difficult to roll, and even when rolling, a heavy drive device is attached to the bottom of the boat. There is no risk of capsizing, etc., because a strong restoring force is generated in combination with the installation of the. In particular, when the hull and the hull are combined and the hull has a dalma-shaped cross-section, it has a stronger restoring force as in the case of a small riser on the ground.

In the case of such a hull structure, it is possible to easily fabricate the levitation body by using a solid material such as Styrofoam, and the levitation body is made of the solid material having the elasticity as described above or a rubber tire. If it is made of a strong elastic material, the hull can be protected at the time of berthing or berthing, and the maneuvering can be facilitated. Hereinafter, the present invention will be specifically described with reference to the drawings.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic side view of a boat with a levitation body according to the present invention, in which the bottom of the ship is incised to show the installed state of a propulsion device. That is, a drive motor 2 and a jet pump 3 connected thereto are installed at the bottom of the hull 1, a suction port 4 is opened at the bottom of the hull 1, and a suction water discharge port 5 is provided at the stern. It has been opened. The jet pump 3 in the illustrated example uses a mixed flow pump having a pair of centrifugal centrifugal blades extending in the drive axis direction.

FIG. 2 is a schematic plan view of a boat according to the present invention, in which a buoyant body 6 is attached to the water line portion on the port side. Figure 3 shows the details of the mounting part,
A levitation body 6 formed in a tube shape is mounted on a support surface 1a formed on the upper edge of the ship 1 on the port side, and is fixed by a band 7. Then, the outer side surface 6a of the floating body 6 in the attached state is made to follow the curved surface of the port side surface 1b of the hull 1, and the hull 1
The port side surface 1b and the outer side surface 6a form a substantially arc surface.

The band 7 in FIG. 3 is provided with a turnbuckle 7a so that the tightening condition can be adjusted. Further, although the float 6 shown in FIG. 3 is made of a tube, it may be made of foam such as synthetic resin.

In the boat constructed as described above, the jet motor 3 is driven by the drive motor 2 so that the water sucked from the suction port 4 is ejected from the discharge port 5 and the boat travels. At this time, if a mixed flow pump having spiral centrifugal blades is used as the jet pump 3, a high-pressure water jet can be ejected, and cavitation does not occur, and stable navigation can be performed at high speed.

Further, during the above-mentioned sailing, the levitation body 6 provided along the port side levitates the hull to mitigate the wave resistance, and at the same time widens the ship's width to prevent the rolling action and stabilize the sailing. You can run. That is, FIGS.
Indicates the suspension state of the hull with respect to the rolling, the symbol G indicates the center of gravity of the hull, and the symbol C indicates the center of buoyancy. Fig. 4 is levitating in equilibrium, and at this time,
Floating body 6 allows for a wide ship width and rolling (side-to-side swing)
Can be suppressed, and overturning can be prevented.

Next, FIG. 5 shows the state of the restoration when it is tilted to the one side (left in the figure), and couples are generated by buoyancy and gravity to completely prevent capsizing. FIG. 6 shows the recoverability from the overturned state, and the overturning can be completely prevented by adjusting the position G of the center of gravity.
Indicates a state in which it is temporarily overturned, and the center of gravity and buoyancy also form a couple at this time.

As described above, the levitation body 6 has an effect on the rolling of the hull 1, but as shown in FIG. 3, the levitation body 6 is smooth on the outer side surface 6a of the levitation body and the port side surface 1b of the hull. It is more effective to form a circular arc surface and to form a cross section of the hull in a dharma shape so that a perfect restoring force can be added in the same manner as the principle of the rising little lawyer.

Further, by constructing the floating body 6 with a strong rubber tube, synthetic resin foam or the like, it is possible to replace the conventional fender.

[0021]

As described above, the levitating body boat according to the present invention can prevent rolling and perform stable high-speed cruising, and the levitating body can be replaced with the fender conventionally required. In terms of cost, it can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a schematic side view of a float-equipped boat according to the present invention.

FIG. 2 is a schematic plan view of the same.

FIG. 3 is a horizontal cross-sectional view of a part of the hull for explaining the mounting state of the floating body.

FIG. 4 is likewise a transverse cross-sectional view showing a floating state of the boat with a levitation body, showing a balanced floating state.

FIG. 5 is a cross sectional view showing a state of tilting to the left.

FIG. 6 is likewise a cross-sectional view showing a state of overturning.

[Explanation of symbols]

 1 Hull 2 Drive motor 3 Jet pump 4 Suction port 5 Discharge port 6 Floating body

Claims (6)

[Claims] 1. A boat configured to squirt water from a propulsion pump 3 installed on the bottom of the ship to travel,
A boat with a levitation body, characterized in that a levitation body 6 is attached to the outer surface of the hull 1. 2. A boat with a levitation body, wherein the propulsion pump is a mixed flow pump 3 using spiral blades extending in the drive axis direction. 3. A boat with a levitation body, wherein a levitation body 6 provided on the outer side surface of the hull 1 is provided along the peripheral surface of the waterline section of the hull, and has a substantially elliptical shape in plan view. 4. A levitating body 6 provided on the outer surface of the hull 1.
However, the boat with a levitation body is supported by the upper edge surface of the hull, and the cross-sectional shape of the hull 1 including the levitation body 6 is formed in a dharma shape. 5. A levitating body 6 provided on the outer surface of the hull 1.
However, a boat with a buoyant body that has a hollow structure and is partitioned into multiple chambers. 6. A levitation body 6 provided on the outer surface of the hull 1.
Is a boat with a float that is made of a synthetic resin foam.