JP3255546B2 - Ship with submerged hydrofoil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monohull type (single-hull type) hull, such as a fishing boat, having a fully submerged hydrofoil.

[0002]

2. Description of the Related Art Recently, small plastic boats have been widely used as pleasure boats and fishing boats. In addition to the pleasure boats, there is an increasing demand for higher speeds in fishing boats. For this reason, high-speed running is performed by mounting a large-horsepower engine on the boat and sliding the hull.

[0003]

When the size of the engine of the propulsion engine is increased to increase the speed of the ship, the cost of the ship increases and the fuel efficiency also increases. Therefore, it is necessary to reduce the propulsion resistance of the hull. It is preferable to adopt a structure in which a hydrofoil is provided. Although the water-piercing type hydrofoil is excellent in terms of stability of the hull, it is inevitable that the hydrofoil protrudes to the side of the hull. In the case of fishing boats, the boat side is often moored by bringing the other boat into contact with the boat side.Also, make sure that there are no protrusions on the boat side for docking at the time of unloading or work on the boat side at the time of fishing. There is a need to. For this reason, it is not possible to employ a water surface penetrating hydrofoil for a fishing boat.

[0004] In order to prevent the protrusion from being generated on the ship side,
A submerged hydrofoil may be used, but a submerged hydrofoil has no function to control the vertical movement and side inclination of the hull, so it always moves up and down by operating the wing elevation and flaps. It is necessary to control the movement. Conventionally, this control measures the flying height of a ship with an ultrasonic sensor or the like, and controls the computer using the measured value. For this reason, these control devices become very complicated and expensive, and are not suitable for small fishing boats and the like.

The present invention has been made to solve such a conventional problem, and can be suitably applied to a fishing boat with a simple structure, and can greatly reduce the propulsion resistance. It is an object of the present invention to provide a ship with a submerged hydrofoil.

[0006]

SUMMARY OF THE INVENTION The present invention provides a monohull type hull in which a fully submerged hydrofoil is provided in front of the center of gravity of the hull, and the hydrofoil comprises a wing body and a flap provided at a rear end thereof, The flaps are provided symmetrically on both sides of the wing body in the width direction of the wing, and each flap is configured to be operable independently of each other. Mechanical control means for controlling the hydrofoil so as to ascend is provided, and when turning, the flaps are independently operated via the control means by steering to tilt the hull in the turning direction. Is what it is.

[0007]

[0008] A control rod is connected to the flap, and a skimmer running on the water surface is connected to the control rod. The lift of the wing body is increased by raising or lowering the skimmer as the water surface rises or falls. Alternatively, it is preferable to adopt a structure configured to operate the flap in the decreasing direction.

In the above configuration, the submerged hydrofoil is provided only on the front side of the hull, and the bottom plate slides on the rear side, so that the configuration of the hydrofoil and the stern hull plate are simple, It is easy to control and drastically reduces propulsion resistance. Further, since the hydrofoil is provided with symmetrical flaps so that they can be operated independently of each other, the lateral inclination can be reliably adjusted even when the hull is a monohull type. Moreover, since the left and right flaps are independently operated by steering, the hull can be inclined in the turning direction when turning.

In addition, if the flap is operated using the vertical movement of the skimmer traveling on the water surface, the hydrofoil can be controlled with a simple configuration.

[0011]

1 and 2, an engine 2 is installed on a hull 1 of a fishing boat made of FRP at a substantially central portion of the hull, and a propeller shaft 20 which is rotationally driven by the engine 2 has a stern direction below the bottom of the hull. And a propeller 21 is attached to the tip of the propeller 21, and a ladder 22 is disposed behind the propeller 21. The hull 1 has a so-called monohull type (single-hull type) at the bottom, and the center of gravity 10
Is located substantially at the center in the front-rear direction of the hull, and is provided with a fully submerged hydrofoil 5 in front of the center of gravity 10 thereof.

As shown in FIGS. 3 and 4, the hydrofoil 5 has a wing body 50 horizontally arranged in the width direction of the ship underwater, and a flap provided at the rear end of the wing body 50. The wing body 50 and the flap 51 form a so-called wing shape as a whole. This wing body 50 is held at both ends by struts 3,
It is held by struts 4 at the center in the boat width direction. The upper end of the strut 3 has a hull side plate 11.
The strut 4 is connected to the bottom plate and extends almost directly below.

The flaps 51 are provided symmetrically on both sides of the wing body 50 in the ship width direction, and swing about a horizontal axis 53 by a rear end portion of the strut 3 and a central rear protruding portion 52 of the wing body 50. Supported as possible. A lower end of a control rod 55 is connected to a side end of the flap 51 via a connecting shaft 54, and the control rod 55 extends upward.
The flap 51 is configured to swing around an axis 53 by the vertical movement. 3 and 4, only one flap 51 is shown, but the other flap 51 is similarly configured in a symmetrical arrangement.

A mixing lever 61 is mounted on the upper part of the strut 3 so as to be swingable about a horizontal pivot 60 in the width direction of the boat so as to extend in the front-rear direction, and an operation cable 62 described later is connected to a front end 63 thereof. Mixing lever 6
A height sensor arm 71 is connected to the rear end of the vehicle 1 so as to be swingable about a shaft 73 in the width direction of the boat. Although not shown, a spring is attached to the shaft 73,
4 is applied to the height sensor arm 71 about the axis 73 in the counterclockwise direction. The height sensor arm 71 extends rearward and downward, and a skimmer body 72 is attached to a distal end thereof. This skimmer body 72
Is composed of a flat plate projecting on both sides from the height sensor arm 71, and the flat plates projecting on both sides are inclined so as to rise toward the side end side, so that waves from the front and both sides hit the lower surface, respectively. The height sensor arm 71 and the skimmer body 72 form the skimmer 7.

The other end (upper end) of the height sensor arm 71 is connected to the upper end of the control rod 55 via a horizontal shaft 74. The front end of the control rod 55 is shown in FIG. Thus, the control rod 55 is guided by the guide groove 34 so as to move up and down so as to move up and down. The horizontal cross-sectional shape of the strut 3 and the control rod 55 is formed so as to be streamlined as a whole as shown by a virtual line 33 in FIG.

FIG. 5 shows an example of the control unit of the flap 3.
The control unit 6 includes a handle 65 having a screw shaft 64, and a screw shaft 64 that is screwed to the screw shaft 64 to rotate the screw shaft 64.
And a mixing lever 67 rotatably mounted on the slide base 69 about a pivot 66. The screw shaft 64 is held so as to be rotatable only, and the slide base 69 is supported by guide means (not shown) so as to be movable only in the screw shaft 64 direction. One end of a pair of operating cables 62 is connected to the mixing lever 67, and the other end of the operating cable 62 is connected to the front ends 63 of the mixing levers 61 respectively attached to the struts 3 on both sides as described above. ing. The connection position of the pair of operation cables 62 is set at a position near the pivot 66 and symmetric with respect to the pivot 66. One end of the mixing lever 67 is connected to one end of an operation cable 68, and the other end of the operation cable 68 is connected to a tiller (not shown) of the rudder 22. The operating cables 62 and 68 are constituted by push-pull cables, the outer tube 62a of the operating cable 62 is attached to a fixed portion of the hull by a stopper 62b, and the outer tube 68a of the operating cable 68 is a stopper. 68b
To the slide base 69.

FIG. 7 shows another embodiment of the present invention, in which a pair of struts 31 extending downward from both sides of the ship and a strut 32 extending downward from the bottom of the ship beside the center of the hull have a pair of widthwise sides. Are provided. In this way, when the hydrofoil is formed only on both sides except for the center in the width direction, the degree of instrumentation can be improved, so that it is possible to prevent the hydrofoil from being damaged by collision of a floating substance, In addition, the weight can be reduced, and the cost of the hydrofoil can be reduced.

FIG. 8 is similar to the example of FIG. 7 in that a pair of hydrofoils 57 in the width direction are provided, and the basic configuration and the operation and effect thereof are the same. This makes it possible to alleviate the occurrence of the outer inclination during turning.

In the configuration shown in FIGS. 1 to 6, when the hull 1 is running at a low speed, the bottom of the boat is flooded from the stern to the bow as shown by the draft surface 9 in FIG. When the ship speed exceeds a certain level, the front of the hull is pushed up by the lift of the hydrofoil 5,
The state shown by the draft surface 90 in FIGS. 1 and 2 is obtained. In other words, the center of the hull and the bottom of the hull rise above the water surface, and the hull weight is supported by the stern bottom and the hydrofoil 5 so that the hull travels. At this time, in this embodiment, 60 to 80% of the total weight of the hull 1 is supported by the hydrofoil 5.

In this running state, FIGS.
As shown in FIG. 7, the skimmer body 72 slides on the water surface, and the lift force exerts a clockwise rotational force on the height sensor arm 71 around the axis 73. This rotational force is generated by the spring attached to the shaft 73. It will be balanced with the opposite rotational force. Therefore, in the state of the draft surface 90, the flap 51 is kept horizontal as shown in the solid line of FIG. 4 and FIG. 6 (a), and the hydrofoil 5 travels at a constant depth.
Then, when the water surface rises and becomes as shown in the draft surface 90a, the skimmer body 72 is pushed up, and the height sensor arm 71 rotates clockwise around the axis 73 to connect the connection shaft 74.
The control rod 55 is pushed down through
4, the flap 51 is swung downward around the axis 53 as shown in the phantom line in FIG. 4 and in FIG. 6B. When the ship is traveling straight, the left and right flaps 51 have the same function. As a result, the flap 51 receives the water pressure on its lower surface, and the lift of the hydrofoil 5 is increased to raise the hull 1 via the strut 3, and as a result, the draft surface 90 a is lowered to the draft surface 9.
It will return to 0.

In the embodiment, the flaps during stable levitation traveling are drawn horizontally, but the flaps are not always horizontal due to the relationship between the elevation angle of the entire wing and the load.

When the draft surface 90 descends as shown by the draft surface 90b, the force which the skimmer body 72 receives from the water surface decreases, so that the height sensor arm 71 rotates counterclockwise around the shaft 73 to connect the connecting shaft 74. The control rod 55 is pulled up through the flap 5 through the connecting shaft 54.
1 is swung upward about the axis 53 as shown in FIG. As a result, the water pressure acts on the upper surface of the flap 51 and the lift of the hydrofoil 5 is reduced, and as a result, the water returns from the draft surface 90b to the draft surface 90 as shown in FIG. In this way, in the straight traveling state, the hydrofoil 5 always runs at a constant depth by the control action of the skimmer 7.

The position of the skimmer body 72 in accordance with a change in the weight of the hull 1 (the direction of the height sensor arm 71).
Is required to be changed, the control is performed by operating the control unit 6. That is, when the screw shaft 64 is rotated by operating (rotating) the handle 65,
Accordingly, the slide base 69 moves, whereby the pair of operating cables 62 are simultaneously pushed and pulled by the same amount. The movement of the slide base 69 causes the operation cable 68 to simultaneously push and pull the outer tube 68a, so that no operation is performed on the tiller connected thereto.

The operation cable 6 is operated by the operation of the control unit 6.
2 is raised, the mixing lever 61
4 will rotate around the pivot 60 in the counterclockwise direction in FIG. 4, whereby the shaft 73 is lowered, and the skimmer body 72 is also lowered accordingly, as shown in FIG.
It follows the lowered draft surface 90b. In this case, the control rod 55 does not move up and down, and the flap 51 maintains a horizontal state, even though the skimmer body 72 is lowered from the position of the draft surface 90 to the position of the draft surface 90b. This is because the skimmer body 72 descends from the draft surface 90 to the position of the draft surface 90b, so that the connecting shaft 74 rises relatively to the shaft 73. However, the shaft 73 descends by this rise. This is because the connecting shaft 74 does not move up and down. Therefore, FIG.
As shown in (d), the hydrofoil 5 travels at a shallow position. By the same action, the operation cable 62
Is depressed, the hydrofoil 5 travels at a deep position.

Next, when the hull 1 turns, the rudder 2
2 is operated, the operating cable 68 is pushed by a force from a tiller (not shown) and pulled, and the mixing lever 67 is rotated around the pivot 66 on the surface of the slide base 69, whereby one end of the mixing lever 67 is attached to the mixing lever 67. One of the coupled actuation cables 62 will be pushed a certain amount and the other will be pulled the same amount.

In FIG. 4, when one operating cable 62 is pulled, the mixing lever 61 on one side connected thereto is rotated counterclockwise around the pivot 60 to lower the shaft 73 at its end. On the other hand, since the draft surface 90 does not change, and the relative position of the skimmer body 72 to the draft surface 90 does not change, the height sensor arm 71 rotates clockwise around the axis 73, whereby the control rod 55 is rotated. The flap 51 is pulled up as shown by the imaginary line in FIG. On the other hand, the flap 51 on the other side is operated in the opposite direction, so that the lift of the hydrofoil 5 increases on one side and the hull 1 descends, and the lift on the other side. Hull 1
Is pushed up, so that the hull 1 tilts sideways by turning. This inclination direction can be determined in advance by the manner of connection of the pair of operating cables 62 to the left and right mixing levers 61 shown in FIG. 5, so that when the hull 1 turns, the hull 1 is inclined sideways by a predetermined amount in the turning direction. be able to.

When the vehicle returns from the turning state to the straight traveling state, the mixing lever 67 is returned to the original state by the operation cable 68, and the flap 51 also returns to the hull 1 in response to this.
Is returned to the horizontal state.

[0028]

As described above, according to the present invention, the fully submerged hydrofoil is provided only on the front side of the hull, and the rear bottom plate slides, so that the hydrofoil and the stern hull are provided. The structure of the plate is simple, the control is easy, and the propulsion resistance is greatly reduced. Therefore, although the structure is so simple that it can be attached to an existing hull, the effect of increasing the speed by remarkably reducing the resistance is remarkable. Further, since the hydrofoil is provided with symmetrical flaps so that they can be operated independently of each other, the lateral inclination can be reliably adjusted even when the hull is a monohull type. Moreover, since the left and right flaps are independently operated by steering, the hull can be inclined in the turning direction when turning.

If the flap is operated by using the vertical movement of the skimmer traveling on the water surface, the hydrofoil can be controlled with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a side view of a hull showing an embodiment of the present invention.

FIG. 2 is an explanatory front view showing the shape of a hydrofoil.

FIG. 3 is a partially enlarged perspective view of a hydrofoil.

FIG. 4 is an enlarged side view of a hydrofoil and a skimmer.

FIG. 5 is an explanatory plan view of a control unit.

FIGS. 6 (a), (b), (c), and (d) are diagrams for explaining flap control by a skimmer.

FIG. 7 is a diagram corresponding to FIG. 2, showing another embodiment of the present invention.

FIG. 8 is a diagram corresponding to FIG. 2, showing still another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 hull 2 engine 3, 4 strut 5 hydrofoil 6 control unit 7 skimmer 11 ship side plate 50 hydrofoil main body 51 flap 54, 74 connecting shaft 55 control rod 60 pivot 61 mixing lever 62, 68 operating cable 71 height sensor arm 72 skimmer main body

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B63B 1/28

Claims (2)

(57) [Claims] A monohull type hull is provided with a fully submerged hydrofoil in front of the center of gravity of the hull.
And a flap provided at the rear end.
Are provided symmetrically on both sides in the width direction of the wing body, and
The laps can be operated independently of each other and can be
The hydrofoil at the center of the hull and
Mechanical to control hydrofoil so that ship bottom rises above water surface
Control means are provided, and the steering wheel
The above flaps are independently operated via the control means
A fully submerged hydrofoil marine vessel characterized in that the body is inclined in a turning direction . 2. A control rod is provided on the flap.
Connected to the control rod,
Skimmers are connected and respond to rising or falling water
Lift of the wing body due to the skimmer going up or down
Operate the flap in the direction that increases or decreases
The ship with submerged hydrofoil according to claim 1, characterized in that it is configured .