JP2959734B2 - Small ship flap structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flap structure which is attached to the bottom of a small boat to adjust the trim and heel (lateral inclination) of the hull.

[0002]

2. Description of the Related Art Conventionally, in a small boat, a flap is attached to a bottom of a boat in order to adjust a trim and a heel of the hull. This flap is mounted so as to be swingable around a hinge extending in the width direction of the ship, by adjusting the heel of the hull by swinging one of the left and right flaps around this hinge, and by swinging both flaps. I try to adjust the trim.

[0003]

The flap configuration has the following problems. In other words, when the flap is not applied, for example, when sailing in front of the wind from the right front, it tends to lean to the right, and the driver will actuate the right flap to the starboard side because the riding comfort is poor in this state Generates lift to eliminate tilt. A yaw moment is generated at the same time as the lift generated by the flap, and the hull turns right. To make the hull straight ahead without such a phenomenon, it is necessary to turn the steering to the left at the same time as operating the flap.

However, the amount and timing of the operation of the steering wheel is very delicate, and it is difficult to perform an appropriate operation due to a delay in the operation of the steering wheel or play in the operation of the flap. Unless this operation is performed properly, the hull cannot go straight, and in fact, it is inevitable that the ship slightly meanders.

The present invention has been made to solve such a conventional problem, and it is possible for a driver to easily perform an appropriate operation of a flap, thereby preventing a ship from meandering. It is an object of the present invention to provide a flap structure for a small boat capable of performing the following.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a V-shaped ship bottom is provided with a concave portion which opens downward and formed on the ship bottom so as to cover both corners of the stern of the ship bottom including the opening of the concave portion. A flap plate is arranged, the flap plate is swingably mounted around a hinge arranged at an angle with respect to the length direction of the ship, and an operation means for swinging the flap plate is housed in the recess. Is what is being done.

[0007] In a structure in which the chine surfaces are formed on both sides of the ship bottom, the flap plate may be formed along the inclined ship bottom surface and the chine surface.

[0008]

In the above construction, the heel moment is generated by swinging the flap plates on both the right and left stern parts around the hinge disposed at an angle to the longitudinal direction of the hull, and the yaw based on the heel moment is generated. The generation of a moment is suppressed, so that it is not necessary to adjust the heel by steering operation, and the hull can be made to move straight forward only by adjusting the flap plate. In addition, a recess is formed in the bottom of the ship and opens downward, and the operating means is accommodated in the recess, and the opening of the recess is covered with a flap plate. It can be rocked reliably. Further, when the side edge portion of the flap plate is formed along the chin surface of the ship bottom, the above-mentioned effect can be achieved better.

[0009]

1 to 3, a hull 1 has a V-shaped bottom plate 2, both side plates 3 and a stern plate 4. The stern side corners of the bottom plate 2, that is, Triangular flap plates 5 are arranged so as to cover the bottom of the ship in contact with the stern plate 4. The flap plate 5 is attached to the bottom plate 2 so as to be able to swing around a hinge 55 which is arranged to be inclined with respect to the width direction of the ship. The bottom plate 2 is formed to be inclined at an angle of θ with respect to the horizontal plane, and chines 21 are formed on both sides. A flap plate 5 is arranged along the inclined surface of the bottom plate 2. It is composed of a main body 50 along the bottom slope and a side edge 51 thereof, and the side edge 51 has a shape along the chine surface 21. The inclination angle α of the hinge 55 with respect to the hull center line Y may be set to, for example, about 30 °, and the inclination angle θ of the bottom plate 2 to the horizontal plane may be set to, for example, about 23 °.

The flap plate 5 is located on the left side of FIG.
As shown in the figure, the ship is in a raised state flush with the bottom plate 2 (inactive state)
Then, by swinging about the hinge 55, the lower state can be achieved as shown in the right side of FIG. 1 and FIG.

FIG. 4 and FIG. 5 schematically show the operation means of the flap plate 5. A conical plunger 9 is mounted on the upper surface of the flap plate 5, and the plunger 9 is mounted on the bottom plate 2 at a position facing the conical plunger. An outer case 7 is inserted into the outer case 7, and a hydraulic cylinder 6 is connected to an upper portion of the outer case 7. A hose 60 for supplying pressure oil from a driving source (not shown) is connected to the hydraulic cylinder 6. Have been. A rubber bag 8 is disposed between the plunger 9 and the outer case 7, and the pressurized oil from the hydraulic cylinder 6 is supplied to and discharged from the rubber bag 8 to move the flap plate 5 up and down through the plunger 9. I try to make it.

FIGS. 6 and 7 show the detailed structure of the operating means. The lower part of the plunger 9 is mounted on the upper surface of the flap plate 5 by bolts 91, and the flange 70 at the lower peripheral edge of the outer case 7 is provided with a packing 70a. Are fixed to each other in a watertight structure by being superimposed on the bottom plate 2 through the through holes and fastened with bolts 70c. A cylindrical portion 71 that opens upward is formed at an upper end portion of the outer case 7, and an inner peripheral thread portion 64 of a lower end portion 66 of the hydraulic cylinder 6 is screwed and connected to the cylindrical portion 71.

A bolt 92 penetrates through the center of the upper end of the plunger 9, and the lower peripheral edge of the rubber bag 8 is pressed via a pressing member 93, and is fixed by being tightened with a nut 92 a. At the upper end of the rubber bag 8, there is formed a cylindrical portion 81 which opens upward.
A core member made of a metal ring or the like is embedded in the inside, so that the rigidity of the cylindrical portion 81 is increased,
The cylindrical portion 81 is pressed into the cylindrical portion 71 and fixed. The tube portion 81 and the tube portion 71 can be fixed by any other appropriate fixing method. A lower end of the piston rod 62 extending upward is provided with a pin 94 at the upper part of the bolt 92.
A spring receiving member 61 is fixed to the upper end of the piston rod 62. The lower surface of the spring receiving member 61 is supported by a return spring 63, and the lower end of the return spring 63 is supported by the inner surface of the upper end of the outer case 7, and the outer peripheral surface of the spring receiving member 61 and the inner peripheral surface of the hydraulic cylinder 6 A gap is formed between them, and the internal space of the hydraulic cylinder 6 and the internal space of the rubber bag 8 communicate with each other.

In a normal state, the return spring 6
3, the spring receiving member 61 is pushed up to the position of the imaginary line in FIG. 6, and the flap plate 5 is in contact with the ship bottom plate 2, but the hydraulic cylinder 6 and the rubber bag 8 are passed through a hose 60 from a hydraulic source (not shown). When the pressurized oil is supplied, the rubber bag 8 expands as shown by the solid line in FIG. 6 and pushes down the flap plate 5 against the force of the return spring 63. When the oil in the hydraulic cylinder 6 is drained, the flap plate 5 is pulled up by the force of the return spring 63 via the spring receiving member 61 and returns to the original position.

In the above construction, the hull 1 is provided with the flap plate 5
When the wind is received from the right front as shown in, for example, an arrow O in FIG.
(Lateral component force) acts, and the hydraulic pressure opposing this acts on the hydraulic pressure center Q as shown by the arrow B. As a result, a turning force acts on the hull 1, so that the propulsion force of the propulsion device 10 is applied as shown by the arrow C so that the hull 1 goes straight without turning due to wind pressure.

On the other hand, the flap plate 5 on the starboard side (lower side in FIG. 2) is lowered to prevent the hull 1 from tilting due to wind pressure.
As a result, a lift is generated on the starboard side, preventing the hull 1 from tilting and preventing a right turning force from being generated.
That is, since the flap 5 swings around the hinge 55 which is arranged to be inclined by α from the hull front-rear direction, when the flap 5 is lowered, the flap 5 is turned in spite of the inclination of the bottom plate. Is approaching a horizontal state,
For this reason, the pressure of the water received by the flap plate 5 is directed upward, and the horizontal component of the pressure of the water received by the flap plate 5 is reduced, whereby the turning force is also reduced.

That is, when the right flap plate 5 is operated, a lift is generated on the starboard side to prevent the occurrence of a heel, and the right turning force due to the yaw moment in the right direction is prevented. Therefore, unlike the conventional case, it is not necessary to adjust the heel by operating the steering wheel, and it is possible to prevent the heel from being generated only by adjusting the flap plate 5, so that the heel can be adjusted easily and accurately. In addition, as is clear from FIG.
A concave portion that opens downward is formed by the outer case 7 and the like. Actuating means such as a plunger 9 and a rubber bag 8 are housed in the outer case 7 and the like (recessed portion), and the outer case 7 and the like ( Since the opening of the recess is covered with the flap plate 5, the plunger 9,
The operating means such as the rubber bag 8 can be prevented from being damaged, and the flap plate 5 can always be reliably swung.

As shown in FIG. 8, the flap plate 5
Since the side edge portion 51 is bent along the chine surface 21, the above-mentioned effect is better achieved. For example, when the flap 5 is swung by 15 ° (open angle between the bottom plate 2 and the flap 5), the dihedral angle of the main body 50 of the flap 5 becomes almost zero, and Since the angle becomes negative and embraces water, the yaw moment is reduced.

FIGS. 9 and 10 show another embodiment of the present invention, in which a stern bottom plate 25 recessed from the bottom plate 2 is formed in the rear part of the bottom in a V-shape in plan view, and a driving means for the flap plate 5 is shown. Is also different from the above example. That is, a concave portion 22 is formed in each of the ship bottoms corresponding to the flap plates 5 on both sides, and a pair of hydraulic cylinders 80 are installed in the concave portions 22, respectively. The piston rod at the distal end is attached to the back surface of the flap plate 5 by a pin 83, which is attached via attachment members 84 and 85 made of a material. In this configuration, the operation and effect are the same as those described above.

When the flap plate 5 is made of FRP as in the case of the ship bottom plate 2 as shown in the figure, the flap plate 5 can be formed using a mold for manufacturing the hull, so that the manufacture is easy. In the state of attachment to the hull, the flap plate 5 is made of the same material as the bottom plate 2, so that there is a sense of unity between the two and the appearance is preferable.

[0021]

As described above, according to the present invention, the heel moment is generated by swinging the flap plates on the right and left stern parts around the hinge which is arranged inclined with respect to the longitudinal direction of the hull. At the same time, the generation of the yaw moment based on the heel moment is suppressed, so that it is not necessary to adjust the heel by steering operation, and the hull can be moved straight forward only by adjusting the flap plate. In addition, a recess is formed in the bottom of the ship and opens downward, and the operating means is accommodated in the recess, and the opening of the recess is covered with a flap plate. It can be rocked reliably. Further, when the side edge portion of the flap plate is formed along the chin surface of the ship bottom, the above-mentioned effect can be achieved better.

[Brief description of the drawings]

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

FIG. 2 is a bottom view of FIG.

FIG. 3 is a partial side view of the hull.

FIG. 4 is a schematic sectional view of a flap plate operating means.

FIG. 5 is a view corresponding to FIG. 4 in an operating state of the flap plate.

FIG. 6 is an enlarged sectional view of a flap plate operating means.

FIG. 7 is an exploded perspective view of FIG.

FIG. 8 is a front view of the flap plate operating state.

FIG. 9 is a perspective view of a hull showing another embodiment of the present invention.

FIG. 10 is a sectional view showing an operation means of the flap plate of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hull 2 Ship bottom plate 3 Ship side plate 4 Stern plate 5 Flap plate 6,80 Hydraulic cylinder 7 Outer case 8 Rubber bag 9 Plunger 21 Chine surface.

Claims (2)

(57) [Claims] 1. A V-shaped bottom of a ship,
A recess is formed that opens toward
Is arranged flaps to cover the stern sides corners of the ship bottom, including, the flap is pivotally mounted to hinge around which is arranged inclined with respect to the longitudinal direction of the ship Rutotomo
Operating means for swinging the flap plate in the recess
The flap structure of a small boat characterized by containing . 2. A chine surface is formed on both sides of the bottom of the ship,
2. The flap structure for a small boat according to claim 1, wherein the flap plate is formed along the bottom surface of the inclined ship and the chine surface.