JPH05286484A - Swing suppressing device for vessel - Google Patents

Abstract

PURPOSE:To provide a swing suppressing device which prevents the collision of a swing suppressing plate with a quay or other vessels and generates a large swing suppressing effect by suppressing the projection of the outer edge of the swing suppressing plate outside a gunnel, in use, and permitting the use of the outer edge in a deep water part where the wave motion radius is extremely small. CONSTITUTION:The basic edge part of a swing suppressing plate 4 which is constituted so that a plate surface 7 is set almost perpendicular to the swing direction is axially supported at an axial supporting part which projects rearward from the transom 2 of a hull 1, and the swing suppressing plate 4 is turned downward from an accommodation state, and is used in the state projecting downward from the ship bottom slantly downward outwardly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-swing device mainly used for ships.

[0002]

2. Description of the Related Art In order to prevent the hull from rocking due to waves during mooring or mooring of a ship, it is known to provide a damping plate having a surface perpendicular to the rocking direction. .. In this case, a means has been adopted in which it is stored on the side of the hull during sailing and is used by projecting outward from the hull when it is desired to prevent swinging during mooring.

As such a conventional example, for example, Japanese Patent Publication Sho
58-28959, JP-B-63-28719 and JP-A-2-44638.

[0004]

However, each of these conventional examples has the following drawbacks.

(A) Since the outer end of the anti-vibration plate protrudes outward from the ship's gunnel during use, the outer end of the anti-vibration plate is likely to come into contact with the quay and the outer plates of other ships. There is a risk.

(1) Since the vibration damping plate operates in the vicinity of the water surface where the radius of wave motion (water particles circularly moves) is the largest in the state of use, the vibration dampener itself becomes a wave motion of the water surface. As it is moved, there is little vibration reduction effect.

In order to solve such a problem, according to the present invention, the outer end of the damping plate is not projected to the outside of the gunnel during use, and the outer end is used at a water depth where the wave radius of movement is extremely small. By using such a mechanism, there is no risk that the damping plate will collide with the quay or another ship, and a damping device having a large damping effect is provided. Specifically, by using a mechanism in which the damping plate extends diagonally downward in a substantially radial manner from the point O (the intersection of the water line and the center of the hull), which is the center of the wobble of the hull,
The purpose is to solve the above problems.

[0008]

When the hull (1) sways around the center of sway O, the anti-sway plate (4) radially extends from the point O into seawater.
On the other hand, seawater hits the right angle and causes water resistance in the vibration damping plate (4), so that the effect of reducing the motion of the hull can be obtained. Particularly in the present invention, since the damping plate (4) extends into the deep sea, the damping plate (4) is hardly affected by the wave motion of the water surface, and the hull is generated by the wave motion of the water surface. The effect that it is easy to reduce exercise is obtained.

[0009]

1 to 4 show a first embodiment of the present invention. The transom (2) of the hull (1) sandwiches a vertical centerline P, and a pair of left and right support shafts (3) and (3) are projected near the centerline P. (3) On (3), the base end portions of the strip-like damping plates (4) and (4) as shown in FIG. 4 are attached and supported so as to rotate integrally with the support shaft (3). ing. This support shaft (3)
A drive shaft is connected to the drive motors (5) and (5) arranged in the hull (1), so that the support shaft (3) can be rotated and fixed. The drive motor (5) is adapted to drive the tip ends of the vibration damping plates (4) and (4) up and down in a vertical plane.

In the above description, the solid line portion in FIG. 1 is in use, and in this state, the vibration damping plate (4) is driven by the motor (5) so that the damping plate (4) is removed from the bottom plate (6) of the hull (1). Also projects downward, and projects obliquely outward and downward so as not to project beyond the outermost end of the hull (1) in the left-right direction, that is, the gun flannel (7).

The position indicated by the chain double-dashed line in the figure is the position of the damping plate (4).
Is in a state of being stored by being rotated upward from the position of the use state, and in this state, the vibration damping plate (4) is in a horizontal state substantially above the water-draining line W. By storing it horizontally in this way, the surface of the anti-vibration plate (4)
This is a step when getting on and off from the transom side of the ship, and can be used as a step when it is not necessary to prevent the shaking of the ship. In the figure, (8) and (9) are stoppers for preventing the anti-vibration plate (4) from rotating downward during use and storage. Particularly, the stopper (9) during storage is the anti-vibration plate. In order to prevent the rotation of (4), the transom (2) can be projected and retracted by appropriate means.

Further, at the tip of the vibration damping plate (4), in the state of being lowered to a use state, each θ = 5 with respect to the forward direction.
By installing a tab (21) inclined at -10 °, this allows the water flow to jump up to the water surface against the force of the motor (5) when it sails without storing it, and collides with driftwood or the like. It is designed not to be damaged. This is because, for example, a damping mechanism including a spring and a hydraulic cylinder is provided between the motor (5) and the vibration damping plate (4) so that the damping mechanism is not pushed back by the periodic force at the time of rocking, but it is one It can be realized by a mechanism that pushes back depending on the continuous force in the direction.

FIGS. 5 and 6 show another embodiment of the present invention, in which the rotation of the damping plate (4) is provided above the transom (2) without using the drive motor as described above. A hoisting mechanism (10) that is manually operated from inside the ship is provided.

That is, a base plate (12) having a horizontal slit (11) is provided on the upper part of the transom (2), and a support pivotally connected to the vibrating plate (4) near the tip thereof. The upper end of the rod (13) is pivotally connected to a slide member (14) slidably arranged inside the slit (11). The handle (15) of the slide member (14) projects above the other slit (16) on the upper surface of the base plate (12),
By holding this handle (15) and sliding it to the left and right, a support rod (13) that moves with the slide.
The vibration damping plate (4) is lifted and lowered via the. However, when the manual hoisting mechanism (10) is used, the tab (21) cannot naturally lift the damping plate.

FIG. 7 shows a further embodiment of the present invention. In this embodiment, the two left and right damping plates (4) and (4) are parallel to each other with the center line P interposed therebetween. In this way, the structure is the same as that described above. In this case, the damping plates (4) (4) are set so that the distance between them is larger than the width of the damping plates (4) (4), whereby one damping plate is provided on the one side. Compared to the one in which the plate (4) is arranged, the effect of damping is greater.

FIG. 8 shows a structure in which the vibration damping plate (4) is held diagonally upward toward the gunnel (7) during storage.
The length of can be maximized to increase the damping effect.

[0017]

As described above, according to the present invention, the configuration is such that the damping plate is housed on the surface of the water when the damping is not required, and is lowered below the surface of the water only when berthing or when the damping is required. Then
And because it has a mechanism that does not project outward from the gunnel,
It is possible to expect a great damping effect without the risk of contact with the quay and other ships. Further, since the tab is provided, even when the anti-sway plate is sailed without being housed, the effect of the tab allows the anti-swing plate to rotate to the surface of the running water and avoid collision with driftwood or the like. There is.

[Brief description of drawings]

FIG. 1 is a rear view of a hull of an embodiment of the present invention viewed from the rear of a transom.

FIG. 2 is a plan view similarly seen from above the transom.

FIG. 3 is a side view similarly seen from the side.

FIG. 4 is a perspective view of the damping plate (4).

FIG. 5 is a rear view seen from the rear of the transom showing another embodiment of the present invention.

FIG. 6 is a plan view of the same.

FIG. 7 is a rear view seen from the rear of the transom showing another embodiment of the present invention.

FIG. 8 is a rear view seen from the rear of the transom showing still another embodiment of the present invention.

[Explanation of symbols]

 (1) Hull (2) Transom (3) Spindle (4) Anti-vibration plate (6) Bottom (11) Slit (12) Base plate (13) Support rod (21) Tab

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] May 26, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

Claims (2)

[Claims] 1. A rear end of a transom of a ship is pivotally supported by a pivot end of a shaft support portion which is provided so as to extend rearward from the transom so that the perturbation plate surface is in the rocking direction of the hull. It is supported so that the outer edge of the damping plate is above the bottom plate of the ship when the damping plate is stored,
When using the anti-vibration plate, the anti-vibration plate rotates around the support shaft, and the tip of the anti-vibration plate extends obliquely downward and obliquely downward of the support shaft, and the anti-vibration plate crosses the rear extension surface of the ship bottom skin. A ship anti-vibration device, characterized in that it projects downward from the bottom and the tip of the anti-vibration plate is inside the ship. 2. The anti-vibration device for a ship according to claim 1, wherein an outer end portion of the anti-vibration plate has a tab having an attack angle of 5 to 10 ° with respect to the anti-vibration plate.