JPS61119489A - Hull-rolling reducing apparatus - Google Patents

Abstract

PURPOSE:To obtain the sufficient rolling reducing effect without increasing the dimension of an antirolling board by forming the vertical fin parts at the front and rear edges and the outer edges of the antirolling board which can be turned freely from the ship side. CONSTITUTION:Under a water line surface W, the turnable accommodation type antirolling boards 1 are installed onto the outer plate parts 7 on the both ship sides of a high-speed boat. On accommodation, said board is accommodated into a concaved part 4, and the same plane state to the outer plate part 7 on the ship side is formed. Vertical fins 1' projecting only towards the upper side are erected at the front and rear edges and outer edges of the antirolling board 1. The mirror image effect is generated by the vertical fin 1', and the effect equal to the increase of the longitudinal length and the width of the antirolling board 1 is generated, and the sufficient rolling reducing effect can be obtained without increasing the dimension of the antirolling board.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for reducing the roll of a ship;
The present invention relates to a hull roll reduction device sometimes suitable for use in high-speed boats.

[Conventional technology]

A typical high-speed boat does not roll much when it is sailing due to the fluid force, but when it is stopped or sailing at low speed and is hit by a shear wave, it will roll violently.

In order to prevent this, a movable anti-rolling board 1 as shown in the upward m2 diagram has been proposed. That is, during normal sailing, the anti-rolling board 1 is stored in the recess 4 formed in the ship's side shell part 7 as part of the ship's side shell part 7, but when the ship is stopped, In such cases, a pair of anti-rolling boards 1 on each side of the ship are spread out until they are horizontal and submerged under the water surface to reduce rolling.

In addition, numeral 2 in the fjS2 diagram is a hydraulic sill that energizes the drive mechanism that rotates and stores the 7-inch rolling board 1 into the recess 4 for storing the 7-inch rolling board as shown by the arrow 3, and 5 is a hydraulic cylinder that rotates and stores the 7-inch rolling board 1 into the recess 4 for storing the 7-inch rolling board. 6 indicates a propeller provided on the left and right sides, and W indicates a water line surface.

[Problem that the invention seeks to solve]

However, in the conventional system where only the anti-rolling board 1 is retracted and extended, in order to increase the rolling reduction force, it is necessary to increase the area, especially the width, of the anti-rolling board 1. Because the rolling board 1 protrudes greatly from the side of the hull,
There is a problem in that it is extremely dangerous, as it may cause a collision accident when another vessel passes by.

The present invention aims to solve these problems, and aims to provide a ship body roll reduction device that has a relatively small overhang from the side and is capable of increasing roll reduction force. shall be.

[Means for solving problems]

Therefore, the hull roll reduction device of the present invention is provided with a retractable 7-inch rolling board on the ship's side skin under water, and one side of the anti-rolling board is pivotally attached to the ship's side skin. A recess for storing an anti-rolling board formed on the outer part of the ship side above the mounting part, and a drive mechanism for rotating and retracting the 7-inch rolling board into the recess are provided, and the anti-rolling board is horizontally +3. The anti-rolling board is characterized in that vertical fins that protrude only on the upper side of the 7-inch rolling board in a stretched state are erected along the front and rear edges of the anti-rolling board and along the outer edges of the upright edges of the anti-rolling board.

[Effect]

In the above-mentioned ship body rolling reduction device of the present invention, when the anti-rolling board rocks in the water according to the rolling of the ship, the vertical fins with the anti-rolling board create a mirror image effect. The anti-rolling board acts as if it were wider, and the rolling can be sufficiently reduced without increasing the size of the anti-rolling board.

〔Example〕

Hereinafter, a ship body rolling reduction device as an embodiment of the present invention will be explained with reference to the drawings. Figure 1 is a perspective view showing a ship equipped with this device in a kasuri style; The same reference numerals as in FIG. 2 indicate almost the same parts.

As shown in the fB1 diagram, below the water surface, that is, the water line surface W1
) is also provided with retractable 7-inch rolling boards 1, 1 on both high-speed ship side shell sections 7 below.

One side of each anti-rolling board 1 is pivotally attached to the ship's side outer panel 7.

In addition, recesses 4 for storing anti-rolling boards are formed in the ship's side skin part 7 above each pivot joint, and the 7-inch rolling board 1 is placed flush with the ship's side skin part 7 in the recess 4. It is designed to be stored in a normal state.

In addition, in the extended state of the 7-inch rolling board 1, the first
As shown in the figure, the anti-rolling board 1 extends horizontally outward from both sides.

Further, a hydraulic sill 2 is provided in each recess 4, which constitutes a drive mechanism for rotating and storing the anti-rolling board 1 into the anti-rolling board storage recess 4 as shown by the arrow 3.

The drive control of the hydraulic cylinder 2 constituting the drive mechanism is performed by a controller (not shown) in the ship or manually.

By the way, when the 7-inch rolling board 1 is stretched out underwater, the vertical fins 1'' that protrude only on the upper side of the anti-rolling board 1 are located at the front and rear edges and the outer edge #k (left edge or bottom edge) of each 7-inch rolling board 1. They are erected along each edge. That is, vertical fins are provided on each of the three sides of the anti-A-ring board 1 in an expanded state that are exposed to water so as to form a wall.

With the above configuration, when the ship is stopped, etc., the hydraulic sill 2 is extended and each anti-rolling board 1 is rotated until it is in a horizontal state (this allows the anti-rolling board 1 to follow the ship's fi! In the water! PI + shake, but at this time! [! Climb onto the fin and create a mirror image effect, 7
Since the length and width of the 7-inch rolling board 1 appear to be increased after ii+f, the rolling reduction effect of the 7-inch rolling board 1 can be greatly enhanced.

In addition, when driving, when the hydraulic cylinder 2 is contracted and each anti-rolling board 1 is stored in the recess 4, the vertical fin 1' is completely stored in the recess 4.
Since the 7-inch rolling board 1 is stored flush with the ship's side outer panel 7, it is possible to sufficiently prevent unnecessary resistance from occurring during navigation.

Note that this device can of course be equipped with a VC in other vessels as well as high-speed boats and small vessels.

〔Effect of the invention〕

As described in detail above, according to the ship roll reduction device of the present invention, a retractable anti-rolling board is provided on the ship's side skin under water, and one side of the 7-inch rolling board is pivoted to the ship's side skin. A recess for storing the anti-rolling board is formed in the side shell section above the pivot point, and a drive mechanism is provided for rotating and retracting the anti-rolling board into the recess. It has a simple structure in which vertical fins that protrude only on the upper side of the anti-rolling board when the board is stretched horizontally are erected along the front and rear edges and the outer edge of the anti-rolling board. There is an advantage in that it is possible to obtain a 1-minute rolling reduction effect without increasing the size of the rolling board.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view of a ship equipped with a ship roll reduction device as an embodiment of the present invention, and FIG. 2 is a schematic perspective view of a ship equipped with a conventional ship roll reduction device. FIG. 1...Anti-rolling board, 1'...Vertical fin,
2. Hydraulic sill constituting the drive W1 structure, 4. Anti-rolling board storage recess, 5. Rudder, 6. Propeller, 7. Ship side outer plate, W. Water line surface.

Claims (1)

[Claims] Under water, a retractable anti-rolling board is provided on the ship's side skin, one side of the anti-rolling board is pivotally attached to the ship's side skin, and an anti-rolling board is provided on the ship's side skin above the pivot point. A recess for storing a rolling board;
A drive mechanism is provided for rotating and retracting the anti-rolling board into the recess, and vertical fins that protrude only on the upper side of the anti-rolling board when the anti-rolling board is horizontally extended are arranged at the front and rear ends of the anti-rolling board. A ship body roll reduction device characterized in that it is installed upright along an edge and an outer edge.