JP2001080573A - Vessel with stationary point retaining specification - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vessel with stationary point retaining specification capable of returning to a stationary point in a short time by a simple linear motion of short distance without requiring any large turning motion. SOLUTION: This vessel with stationary point retaining specification 1 comprises a vertical tail fin 4 raised on the rear part of a hull 2 and a hydrofoil 5 provided on the front part of the hull 2. According to this, even if the vessel 1 to be retained in a stationary point is carried by wind and shifted from the stationary point, the vessel 1 is carried in the state where the bow is regularly turned to the stationary point on the windward by the effect of the vertical tail fin 4 raised on the rear part of the hull 2 and the hydrofoil 5 provided on the front part of the hull 2. Therefore, the vessel 1 can be returned to the stationary point in a short time by a simple linear motion of short distance without requiring any large turning motion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ship having specifications to be kept at a fixed point.

[0002]

2. Description of the Related Art For example, when an observation boat that stops at a predetermined position and performs various observations, or a fishing boat that stops at a predetermined position and performs fishing, holds a fixed point on the sea, as shown in FIG. In the meantime, the ship 101 is drifted downwind by the wind in the direction of the arrow and deviates from the fixed point P. When the ship 101 is swept by the wind in this way, the ship 101 is often swung in a horizontal state as illustrated.

[0003]

However, when the ship 101 is swept horizontally as described above, the ship 10
In order for 1 to return to the original fixed point P, it is necessary to draw a large arc as shown by the arrow in FIG. There is a problem that it takes a long time to return to a fixed point.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to fix a fixed point which can return to a fixed point in a short time by a simple linear movement of a short distance without requiring a large turning movement. It is to provide a ship of specifications.

[0005]

In order to achieve the above object, the invention according to claim 1 is characterized in that a vertical tail is erected on the rear part of the hull to constitute a fixed point holding specification ship.

According to a second aspect of the present invention, in the first aspect of the present invention, a hydrofoil is provided at a front portion of the hull.

A third aspect of the present invention is characterized in that a vertical tail is erected on the rear part of the hull, and a hydrofoil is provided on the front part of the hull to constitute a fixed point holding specification ship.

According to a fourth aspect of the present invention, in the first, second or third aspect of the invention, two independently controllable propulsion units are provided on a ship having a fixed point holding specification.

Therefore, according to the present invention, even if a ship to be held at a fixed point is deviated from the fixed point by the wind, it is provided at the vertical tail mounted on the rear of the hull or at the front thereof and at the front thereof. Due to the action of the hydrofoil, the ship is flown with the bow always facing the fixed point on the windward, so that the ship can return to the fixed point in a short time simply by a simple linear motion without a large turning motion. it can.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side view of a fixed-point holding ship according to the present invention, FIG. 2 is a plan view of the ship, FIG. 3 is a rear view of the ship, and FIG. FIG. 4 is a schematic plan view showing a state of return.

The ship 1 according to the present embodiment is an unmanned observation ship for fixed-point observation, and an electric propulsion device 3 which can be independently controlled is provided at the rear left and right of the hull 2 respectively. . The operations of the two propulsion units 3 and the observation equipment (not shown) installed in the hull 2 are respectively controlled by remote control.

In the ship 1 according to the present embodiment, a plate-shaped vertical tail 4 having a trapezoidal shape in a side view is vertically erected at the center of the rear of the hull 2 in the width direction. At the center in the width direction of the front bottom surface immersed in the second water, a hydrofoil 5 having a substantially trapezoidal shape in a side view is vertically provided. The hydrofoil 5 constitutes a bow rudder that is steered left and right, and is accommodated in the hull 2 as necessary as shown by a chain line in FIG.

As shown in FIG. 4A, when the ship 1 having the above structure is holding a fixed point on the sea for observation, when the ship 1 receives wind in the direction of the arrow, the ship 1
The hull 2 receives the wind and drifts downwind and deviates from the fixed point P. However, the boat 1 according to the present embodiment hangs on the vertical tail 4 erected on the rear of the hull 2 and the front bottom surface of the hull 2. By the action of the provided hydrofoil 5, the bow is always flown in a state where the bow always faces the fixed point P on the windward side as shown in the figure. That is, as shown in FIG. 1, the aerial-side area center G1 of the hull 2 moves rearward (leftward in FIG. 1) for the vertical tail 4, and the underwater-side area center G2 moves forward (for the hydrofoil 5). As described above, the ship 1 is moved with the bow always facing the fixed point P on the windward side as described above.

When the ship 1 is swept downwind from the fixed point P by a predetermined distance, the right and left propulsion units 3 are driven to drive the ship 1
Is returned to the fixed point P, but as described above, the ship 1 is flown with the bow always facing the fixed point P on the windward side.
As shown in FIG. 4B, the marine vessel 1 can return to the fixed point P in a short time by a simple linear motion of a short distance, and does not need to perform a large turning motion as in the related art (see FIG. 6B). ). It should be noted that the steering when returning the ship 1 to the fixed point P is performed by controlling the left and right propulsion units 3 independently, but in the case of normal movement, it is equal to the left and right propulsion units 3 in consideration of efficiency. It is desirable to generate thrust and perform steering by steering operation of the hydrofoil 5 constituting the bow rudder.

By the way, as shown in FIG. 5, the same effect as described above can be obtained by constructing a vertical tail unit by extending a sail 7 on a mast 6 vertically provided on the rear portion of the hull 2. If necessary, the mast 6 may be configured to be housed in the hull 2 as shown by a chain line in FIG.

[0017]

As is apparent from the above description, according to the present invention, even if a ship to be held at a fixed point is deviated from the fixed point by the wind, the vertical tail or the tail mounted on the rear part of the hull will be described. Because of this and the action of the hydrofoil provided at the front of the hull, the ship is flowed with the bow always facing the fixed point on the wind, so that the ship can be moved by a simple linear motion for a short distance without a large turning motion. The effect of being able to return to the fixed point in a short time is obtained.

[Brief description of the drawings]

FIG. 1 is a side view of a ship of a fixed point holding specification according to the present invention.

FIG. 2 is a plan view of a fixed point holding ship according to the present invention.

FIG. 3 is a rear view of the fixed-point-maintaining ship according to the present invention.

FIG. 4 is a schematic plan view showing a situation in which a ship with a fixed point holding specification according to the present invention leaves the fixed point and returns to the fixed point.

FIG. 5 is a side view of a ship of a fixed point holding specification according to another embodiment of the present invention.

FIG. 6 is a schematic plan view showing a conventional state of a ship leaving a fixed point and returning to a fixed point.

[Explanation of symbols]

 1 Ship with fixed point specification 2 Hull 3 Propulsion 4 Vertical tail 5 Hydrofoil 6 Mast 7 Sail P Fixed point

Claims (4)

[Claims] 1. A fixed point holding specification ship comprising a vertical tail mounted on a rear part of the hull. 2. The fixed point holding specification ship according to claim 1, wherein a hydrofoil is provided at a front portion of the hull. 3. A fixed-point-maintaining ship having a vertical tail mounted on the rear of the hull and a hydrofoil provided on the front of the hull. 4. The fixed point holding specification ship according to claim 1, further comprising two independently controllable propulsion units.