JP2005186715A - Hull - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hull provided with fins optimally adjustable according to a navigating state of the hull. <P>SOLUTION: This hull 1 is provided with each of the fins 5 oscillatably provided around an axis extending in the longitudinal direction along a vessel side 3 in left and right lower parts on the vessel side 3. In stored states of the fins 5, the outside faces are arranged along an outer plate 2 of the hull 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a hull.

A fin stabilizer is used in order to prevent the rolling of the hull due to waves and to stabilize the hull during bad sea conditions.
In this case, fins are attached in the vicinity of the left and right ship side lower portions, and the vibration of the hull is reduced by the fluid force acting on the fins. As shown in Patent Document 1, the fin is stored in a storage recess provided in the hull when not in use, so that the propulsion performance of the hull is not deteriorated.

Japanese Utility Model Laid-Open No. 1-1131698 (Specification, page 4, line 18 to page 6, line 10 and FIGS. 1 to 3)

  By the way, as for the thing shown in patent document 1, since a fin rotates around the axis line extended in an up-down direction along a ship side, and appears, the water depth is shallow and it passes along the channel with an obstruction in the advancing direction of a fin. In some cases, it is necessary to completely store the fins or make the overhang very small. In this case, the function of the stabilizer is lost, and there is an inconvenience that the navigation safety is lowered. In order to completely store the fin, it is necessary to provide a deep recess, and there is a disadvantage that the resistance increases due to the recess when the fin is extended.

  In view of the above problems, an object of the present invention is to provide a hull provided with fins that can be optimally adjusted according to the navigation status of the hull.

In order to solve the above problems, the present invention employs the following means.
That is, the hull according to the present invention is provided with fins provided on the left and right ship side lower portions so as to be swingable around an axis extending in the front-rear direction along the ship side, and the outer surface of the hull is hulled in the retracted state. It is arranged along the outer plate.

Thus, since the fin is provided so as to be swingable about the axis extending in the front-rear direction along the ship side, it can be set at an arbitrary angular position. Therefore, it can be adjusted to an optimal angular position according to the ship's progress and sea conditions. That is, for example, when passing through a shallow channel such as a towing channel in a harbor, if the fin swing angle is decreased and the fin is positioned upward, the fin hits the bottom of the water and is damaged. Can be prevented.
Moreover, since the outer surface of a fin is arrange | positioned along a hull outer board | plate at the time of fin storage, a fin does not become resistance with respect to advancing of a ship. Therefore, even if the fins are provided, it is possible to prevent deterioration of the fuel efficiency and stability of the ship.

  The hull according to the present invention is characterized in that fins are formed in a plate shape, and a concave portion having a depth about the thickness of the fin capable of accommodating the fins during storage is formed in the hull outer plate.

As described above, since the hull outer plate in the fin installation portion is only formed with a recess having a depth about the thickness of the fin in order to accommodate the fin when stored, there is little unevenness of the hull when the fin is extended. . Therefore, there is almost no increase in resistance due to the recess when propelling the hull during fin operation. Further, since the outer surface of the fin is flush with the ship side during storage, the hull is prevented from being deteriorated in propulsion performance.
Moreover, since there are few protrusions to the inside of a hull outer board, the inside of a hull can be used widely.

  Furthermore, the hull according to the present invention is characterized in that a lid member is provided on the hull side of the fin so as to cover the opening of the hull outer plate when the fin extends over the ship side.

  As described above, since the lid member that covers the opening of the hull outer plate is provided when the fin is extended, the outer surface of the lid member is flush with the hull outer plate when the fin is used. For this reason, the opening portion does not become a resistance against the progress of the ship, so that the deterioration of the propulsion performance of the ship can be prevented.

According to the first aspect of the present invention, since the fin is provided so as to be swingable around an axis extending in the front-rear direction along the ship side, it is adjusted to an optimal angular position according to the progress of the ship and the sea state. it can.
Moreover, since the outer surface of a fin is arrange | positioned along a hull outer board | plate at the time of fin storage, even if it provides a fin, the deterioration of the fuel consumption and stability of a ship can be prevented.

According to the invention described in claim 2, since the hull outer plate in the fin installation portion is only formed with a recess having a depth about the thickness of the fin in order to accommodate the fin during storage. There is almost no increase in resistance during hull propulsion during operation and storage.
Moreover, since there are few protrusions to the inside of a hull outer board, the inside of a hull can be used widely.

  Furthermore, according to the third aspect of the present invention, since the lid member that covers the opening of the hull outer plate is provided when the fin is extended, deterioration of the propulsion performance of the ship can be prevented.

Embodiments according to the present invention will be described below with reference to the drawings.
[First embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
Drawing 1 is a figure showing the schematic shape which looked at the hull concerning this embodiment from back.
Fins 5 are provided on the left and right sides of the lower side of the ship side 3 of the hull 1. The fin 5 is provided near the center of the hull 1 in the front-rear direction.
In addition, in FIG. 1, the hull 1 has shown the state which is passing the dredged channel 6 in a harbor.

FIG. 2 is an enlarged cross-sectional view showing a portion of the fin 5 of FIG. FIG. 3 is a side view showing the retracted state of the fin 5.
In the lower part of the ship side 3, there are provided a recess 7 for storing the fin 5 and a watertight structure 9 for attaching a mechanism for supporting and driving the fin 5. The recess 7 is a recess provided in the hull outer plate 2 and has a substantially rectangular shape in which the length in the vertical direction of the hull 1 is longer than the length in the front-rear direction.

The fin 5 includes a main body 11 having a substantially elliptical cross section and a substantially rectangular outer plate 13 attached to the outside of the main body 11. The width of the main body 11 is slightly narrower than the outer plate 13. The fins 5 are provided extending in the vertical direction of the hull 1.
Since the shape of the concave portion 7 in the front-rear direction is a shape for receiving the main body 11 of the fin 5 to be stored, the front and rear end portions are formed with smooth curves. The middle part in the front-rear direction of the recess has the same shape as the main body 11. That is, it forms a part of a substantially elliptical shape with a long major axis.

  The fin 5 is slightly curved in the longitudinal direction so as to follow the shape of the ship side 3. The depth of the recess 7 substantially matches the thickness of the fin 5. When the fin 5 is stored in the recess 7, the outer plate 13 is substantially flush with the hull outer plate 2.

A shaft 15 extending in the front-rear direction along the ship side 3 is attached to a lower portion of the main body 11. The shaft 15 is rotatably supported by the watertight structure portion 9. The shaft 15 is rotated by a motor 17.
As the shaft 15 rotates, the fin 5 swings up and down around the shaft 15.

The operation of the hull 1 according to the present embodiment described above will be described.
When the hull 1 is shaken by waves during a bad sea condition, the motor 17 rotates the shaft 15 to swing the fins 5 in the vertical direction and swings the fins 5 out of the hull 1.
The fin 5 becomes a large resistance when the hull 1 is shaken, and attenuates the shake of the hull 1. Therefore, the hull 1 is less shaken.

Since the fin 5 can be stopped at an arbitrary angular position in the vertical direction, it can be set to an optimal angular position according to the navigational state or sea state of the hull.
For example, as shown in FIG. 1, when passing through a shallow channel 6 such as a towing channel in a harbor, the tip of the fin 5 is positioned upward so that the fin 5 does not hit the bottom of the water and be damaged. Thus, the position shown by the solid line in FIG. In this case, the fins can still be disposed in the water only by avoiding interference, so that it can function as a stabilizer. Further, when the shaking is significant, the position is set to a position where the distance from the center of shaking of the hull 1 to the tip of the fin 5 becomes large, for example, a position indicated by a one-dot chain line in FIG.

  Since the front and rear end portions of the concave portion 7 are formed with a smooth curve, the water flow flowing backward along the hull outer plate 2 is almost peeled off at the concave portion 7 when the fins 5 are projected. Absent. Therefore, the propulsion resistance hardly increases except the increase in the propulsion resistance due to the fins 5.

When the sea conditions turn around and the number of waves decreases, the motor 17 rotates in the reverse direction to swing the fins 5 upward and store them in the recesses 7.
Since the outer plate 13 of the fin 5 is disposed along the hull outer plate 2, the water flow flowing backward along the hull outer plate 2 flows smoothly on the surface of the outer plate 13. Therefore, it can prevent that the propulsion performance of a hull falls.
In addition, since the outer plate 13 is substantially flush with the hull outer plate 2, the hull propulsion performance can be further prevented from lowering.

Hereinafter, the operation and effect of the hull according to the present embodiment will be described.
In the hull 1 according to the present embodiment, the fins 5 are provided so as to be swingable around the shaft 15 extending in the front-rear direction along the ship side 3, and therefore can be set at an arbitrary angular position. Therefore, it can be adjusted to an optimal angular position according to the ship's progress and sea conditions.
Moreover, since the outer surface of the outer plate 13 is disposed along the outer surface of the hull outer plate 2 when the fin 5 is stored, the fin 5 does not resist the progress of the ship. Therefore, even if the fins 5 are provided, it is possible to prevent the deterioration of fuel efficiency and stability of the ship.

Further, since the hull outer plate 2 in the fin installation portion is only formed with a recess 7 having a depth about the thickness of the fin 5 in order to accommodate the fin 5 when stored, the hull 1 when the fin 5 is extended. There is little unevenness. For this reason, an increase in resistance due to the concave portion 7 is hardly observed when propelling the hull when the fin 5 is in operation. Further, since the outer surface of the fin 5 is flush with the hull outer plate 2 at the time of storage, the hull 1 is prevented from being deteriorated in propulsion performance.
Moreover, since there are few protrusions to the inside of the hull outer plate | board 2, the inside of the hull 1 can be used widely.

[Second Embodiment]
Next, 2nd embodiment of this invention is described using FIGS.
FIG. 4 is an enlarged cross-sectional view showing a portion of the fin 5 in the retracted state shown in FIG. FIG. 5 is a partial cross-sectional view showing the protruding state of the fin 5 at the same portion as FIG. 4. FIG. 6 is a side view showing the retracted state of the fin 5.

In the present embodiment, a hull 1 to which relatively small fins 5 are applied is shown.
An opening 31 for storing the fin 5 and a sea chest 33 having a watertight structure for storing the fin 5 related structure are provided at the lower part of the vertical portion of the ship side 3. The opening 31 has a substantially rectangular shape that is long in the front-rear direction.

The fin 5 has substantially the same shape as the opening 31, and a lid member 35 having substantially the same shape is integrally provided so as to be substantially orthogonal to the inside of the lower end portion thereof.
A shaft 37 extending in the front-rear direction along the ship side 3 is attached to a joint portion between the fin 5 and the lid member 35. The shaft 37 is rotatably supported by the sea chest 33. The shaft 37 is rotated by a motor 39.
The fin 5 and the lid member 35 swing around the shaft 37 by the rotation of the shaft 37.

In the retracted state shown in FIG. 4, the outer surface 30 of the fin 5 is disposed along the hull outer plate 2 and is flush with the outer surface of the hull outer plate 2.
On the other hand, the upper surface 36 of the lid member 35 is disposed along the hull outer plate 2 and is flush with the outer surface of the hull outer plate 2 in the fin 5 projecting state shown in FIG.

The operation of the hull 1 according to the present embodiment described above will be described.
When the hull 1 is shaken by waves during a bad sea condition, the motor 39 rotates the shaft 37 to swing the fin 5 and the lid member 35 in the vertical direction, and as shown in FIG. Swing out the hull 1.
The fin 5 becomes a large resistance when the hull 1 is shaken, and attenuates the shake of the hull 1. Therefore, the hull 1 is less shaken.

  At this time, the upper surface 36 of the lid member 35 is flush with the outer surface of the hull outer plate 2. Therefore, the water flow flowing backward along the ship side flows smoothly along the upper surface 36 of the lid member 35, so that the propulsion resistance hardly increases except for the increase in the propulsion resistance due to the fins 5.

Further, when the shaking is significant, the shaft 37 is further rotated, and the lid member 35 is projected outward from the hull 1 to increase the resistance to the shaking.
In this case, resistance is generated at the opening 31 and propulsion resistance is increased, but this is performed in consideration of the effect of reducing shaking.

When the sea state improves and the waves are reduced, the motor 39 is rotated in the reverse direction, and the fins 5 are swung upward and stored in the openings 31.
Since the outer surface 30 of the fin 5 is disposed flush with the hull outer plate 2 along the ship side, the water flow flowing rearward along the hull outer plate 2 smoothly flows on the outer surface 30. Therefore, it can prevent that the propulsion performance of a hull falls.

Hereinafter, the operation and effect of the hull according to the present embodiment will be described.
Thus, when the fin 5 is stored, the outer surface 30 of the fin 5 is disposed along the outer surface of the hull outer plate 2, so that the fin 5 does not resist the progress of the hull 1. Therefore, even if the fins 5 are provided, it is possible to prevent the deterioration of fuel efficiency and stability of the ship.

  Further, since the lid member 35 that covers the opening 31 of the hull outer plate 2 is provided when the fin 5 is extended, the upper surface 36 of the lid member 35 is flush with the hull outer plate 2 when the fin 5 is used. Therefore, since the opening 31 does not become resistance to the progress of the hull 1, the deterioration of the propulsion performance of the hull 1 can be prevented.

In the present embodiment, one lid member 35 is fixed to the fin 5, but the present invention is not limited to this.
For example, the plurality of lid members 35 may be provided by being shifted by a predetermined angle and fixed. In this way, the number of fins 5 or the like that are resistance sources can be increased or decreased according to the sea state. And since the opening part 35 can be closed, it can prevent that the propulsion performance of the hull 1 falls.

  Moreover, you may enable it to move independently of the fin 5 by making the cover member 35 into a different body. In this way, even if the angular position of the fin 5 is adjusted according to the sea state and the navigation situation, the opening 31 can always be covered with the lid member 35, so that the propulsion performance of the hull 1 can be prevented from being lowered.

It is a block diagram showing the schematic shape which looked at the hull concerning one embodiment of the present invention from back. It is a cross-sectional view which expands and shows the part of the fin 5 of FIG. It is a side view which shows the retracted state of the fin 5 of FIG. It is a cross-sectional view which expands and shows the part of the fin 5 concerning 2nd embodiment of this invention. FIG. 5 is a partial cross-sectional view showing a state in which the fins 5 are projected in the same part as FIG. It is a side view which shows the storing state of the fin 5 concerning 2nd embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hull 2 Hull outer plate 3 Ship side 5 Fin 7 Recessed part 31 Opening 35 Cover member

Claims (3)

The left and right ship side lower parts are provided with fins provided so as to be able to swing around an axis extending in the front-rear direction along the ship side, and the fins are arranged in the retracted state with the outer surfaces thereof arranged along the hull outer plate. Hull characterized by. The hull according to claim 1, wherein the fin is formed in a plate shape, and a concave portion having a depth about the thickness of the fin that can accommodate the fin when stored is formed in the hull outer plate. The hull according to claim 1, wherein a lid member is provided on the hull side of the fin to cover the opening of the hull outer plate when the fin is extended to the hull side.

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