JPH09202293A - Oscillation damping device for marine vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope with oscillation in both pitching and rolling developed by a marine vessel by means of one equipment. SOLUTION: A turn table 12 is set over a marine vessel 1. A casing 9 provided with a bottom plate 2 in the longer direction, which is curved in such a way as to be swelled downward at its center, is mounted onto the turn table 12, and a weight is attached onto the bottom plate 2 in such a way as to be freely moved in the longer direction. Pin holes 15a and 15b are provided for places mutually dislocated by 90 deg. with respect to the turning center of the turn table 12, and a locking hole 17 is provided for the side of the marine vessel 1. When the turn table 12 is turned around until the pin hole 15a coincides with the lock hole 17 so as to allow a lock pin 16 to be inserted therein, the casing 9 can be aligned with the direction of rolling, and when the turn table 12 is turned around until the pin hole 15b coincides with the lock hole 17 so as to allow the lock pin 16 to be inserted therein, the casing 9 can thereby be aligned with the direction of pitching.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-sway device installed and used on a ship such as a leisure boat.

[0002]

2. Description of the Related Art Since a relatively small vessel such as a leisure boat has a shorter width direction (port direction) than a longitudinal direction (stern direction), it is swayed mainly in the roll direction by external force such as wave force or wind force. It tends to occur, but it also shakes in the pitch direction. As shown in FIGS. 6 (a) and 6 (b), a swinging device for reducing swinging in the roll direction includes a bottom plate 2 as a bending member that is curved and formed with a required curvature on the ship 1 as shown in FIG.
Is arranged so that the center of curvature is located above.
It is installed and fixed via the support base 3 in the roll direction (the direction of arrow X), and the weight 4 is movable (swingable) on the bottom plate 2 along the longitudinal direction of the bottom plate 2 via the wheels 5. On the bottom plate 2 and at both ends in the longitudinal direction on the bottom plate 2.
An end face plate 6 serving as a stopper for preventing the shaking is provided, side plates 7 are erected on both front and rear sides along the longitudinal direction of the bottom plate 2, and a space surrounded by the front and rear side plates 7 and both end face plates 6 is provided. A casing 9 is formed so as to close the upper surface with an upper surface plate 8 to form a moving space for the weight 4 in the casing 9, and further, on a side surface portion of the weight 4,
When side rollers 10 are provided so as to roll in contact with the inner surfaces of the front and rear side plates 7 of the casing 9, buffers 11 are attached to both end surfaces of the weight 4 in the moving direction, and when the ship 1 shakes in the roll direction. A single string motion type passive vibration damping device has recently been proposed in which the weight 4 is repeatedly moved in the longitudinal direction as a rail on the bottom plate 2 in the casing 9 through rolling of the wheels 5 and the side rollers 10. Has been done.

According to such a vibration reducing device, since the natural period of the weight 4 is given by the bending of the bottom plate 2, mechanical parts for adjusting the natural period are not required, and a large stroke can be achieved with a simple structure. It can be realized and a great vibration reduction effect can be obtained.

[0004]

However, as described above, in the marine vessel 1 such as the leisure boat, the dimension in the roll direction is shorter than the dimension in the pitch direction, and in general, it is easy to sway in the roll direction against waves. Therefore, since the above-described vibration reduction device is installed such that the longitudinal direction of the casing 9 is the roll direction, there is a problem that the vibration in the pitch direction cannot be dealt with. That is, in the case of the ship 1, the pitch direction swing may be larger than the roll direction swing depending on the direction of the wave, but the swinging device cannot properly use the operating direction. It is necessary to install two in order to cope with the sway in the direction.

Therefore, the present invention is intended to enable a single damping device to deal with swings in either the roll direction or the pitch direction.

[0006]

In order to solve the above problems, the present invention mounts a turntable on a ship so that the turntable can turn freely, and the center of the turntable is curved so as to bulge downward. A casing having the curved member in the longitudinal direction is installed, a weight is movably mounted on the curved member in the casing in the longitudinal direction in which the curved member extends, and the longitudinal direction of the casing is the same as that of the vessel. The structure is provided with a positioning mechanism for fixing the turning position of the turntable so as to match any direction between the roll direction and the pitch direction.

When the ship shakes in the roll direction, the turntable is adjusted so that the longitudinal direction of the casing coincides with the roll direction and the positioning mechanism positions the turntable. Can be reduced. On the other hand, if the ship shakes in the pitch direction, the turntable is adjusted so that the longitudinal direction of the casing matches the pitch direction and the positioning mechanism is used to perform positioning. To be made.

Further, the positioning mechanism is provided with a pin hole for fixing in the roll direction and a pin hole for fixing in the pitch direction, which are provided at a position on the same circumference at an angle of 90 degrees from the turning center of the turntable, and the positioning mechanism on the ship side. When configured with a lock hole provided to insert the lock pin through any of the above pin holes at the position, turn the turntable to a position where the pin hole for fixing the roll direction matches the lock hole, By positioning the turntable by inserting the lock pin into the pin hole and the lock hole for fixing the roll direction, the casing direction is adjusted to the roll direction, while the pin hole for fixing the pitch direction is aligned with the lock hole. Position the turntable by turning the turntable and inserting the lock pins into the pin holes and lock holes for fixing the pitch direction. More, the orientation of the casing is adapted to the pitch direction.

Further, if another pin hole is formed on the same circumference between the pin hole for fixing the roll direction and the pin hole for fixing the pitch direction, an external force is applied to the ship from an oblique direction. When the lock action is applied, by inserting the lock pin by aligning the pin hole located between the roll direction fixing and the pitch direction fixing with the lock hole, the direction of the casing is adjusted to the direction of the external force via the turntable. .

On the other hand, a turntable can be driven to rotate by an actuator, and a roll angle detecting sensor for detecting the swing of the ship in the roll direction, a pitch angle detecting sensor for detecting the swing of the ship in the pitch direction, and these roll angle detecting sensors, Comparing the detection signals of the pitch angle detection sensor, calculating the direction of large swing in the roll direction and the pitch direction, and selecting the turning position of the turntable so as to align the casing with the direction of large swing of the ship. In the case of a configuration including a control device configured to send a command to the actuator and a comparison computing unit, the turning position of the turntable is controlled based on the command from the control device, so that the orientation of the casing changes. It is automatically adjusted in the roll direction or the pitch direction according to the shaking of the ship.

Further, a command for selecting the turning position of the turntable is issued to the comparison computing unit so that the longitudinal direction of the casing is aligned with the direction in which the magnitudes of both the roll direction and the pitch direction are combined. With the configuration having the function, the orientation of the casing is automatically adjusted to the optimum direction in accordance with the orientation of the external force acting on the ship.

[0012]

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

FIGS. 1 and 2 show an embodiment of the present invention. As in the case of FIGS. 6 (a) and 6 (b), as a bending member, the center portion is bent so as to bulge downward. In the configuration in which the weight 4 is movably accommodated in the longitudinal direction in the elongated casing 9 composed of the bottom plate 2, the front and rear side plates 7, the top plate 8 and the end face plate 6, the base 13 is mounted on the roof 1a of the ship 1. Install the turntable 12 on the base 13.
Is mounted so as to be able to turn around a central turning shaft 14, and the casing 9 is mounted on the turntable 12 so that the casing 9 can turn together with the turntable 12. Further, as a positioning mechanism for turning and positioning the turntable 12 to determine and fix the longitudinal direction of the casing 9, the turntable 12 has an angle about the turning shaft 14 of 90 degrees.
A pin hole 15a for fixing in the roll direction and a pin hole 15b for fixing in the pitch direction are bored at positions on the same circumference at a degree, and the base 13 is arranged in the longitudinal direction of the casing 9. The lock hole 17 is provided so as to coincide with the pin hole 15a or 15b when oriented in the roll direction or the pitch direction, and the turning position of the turntable 12 is obtained by inserting the lock pin 16 into the lock hole 17 from the pin hole 15a or 15b. Is fixed so that the direction of the casing 9 can be fixed. A rail as a bending member on which the weight 4 rides may be provided on the bottom plate 2.

During navigation of the ship 1, swaying in the roll direction (arrow X direction) is generally apt to occur due to the restoring force due to buoyancy and the external force due to waves, etc. Therefore, as shown by the solid line in FIG. The table 12 is turned to orient the casing 9 in the roll direction, and the pin hole 15a for fixing the turntable 12 in the roll direction is provided on the base 1
By inserting the lock pin 16 so as to correspond to the lock hole 17 of No. 3, the position of the turntable 12 is fixed and the casing 9 is positioned in the roll direction. As a result, it is possible to reduce the sway in the roll direction that acts on the boat 1 and improve the riding comfort.

On the other hand, as shown in FIG. 1, the bow of the ship 1 faces in the wind direction (direction of arrow A) while the ship is stopped, but a flag 18 is set at the rear of the ship 1 to force the bow in the wind direction. Often point to. In such a case, since the ship 1 is at a right angle to the wave 19, the pitch direction (arrow Y direction) swings more than the roll direction. Therefore, in order to reduce the swing in the pitch direction, the
As shown by the dotted line, turn the turntable 12
A pin hole 15b for turning the casing 9 in the pitch direction by turning it by 0 degree and fixing the turntable 12 in the pitch direction
Align the lock hole 17 of the base 13 with the lock pin 1
By inserting 6, the position of the turntable 12 is fixed and the casing 9 is positioned in the pitch direction. As a result, it is possible to effectively reduce the swing in the pitch direction that acts on the ship 1.

As described above, according to the present invention, one device can be used for swinging in the roll direction and swinging in the pitch direction.

Next, FIG. 3 shows another embodiment of the present invention. In the same construction as that shown in FIGS. 1 and 2, a pin hole for fixing the roll direction in the turntable 12 is provided. A plurality of (three in the figure) pin holes 15c corresponding to the lock holes 17 of the base 13 are formed at required positions between the pin 15a and the pin hole 15b for fixing the pitch direction.

With the construction as shown in FIG. 3, when an external force due to wind, waves, etc. acts obliquely on the ship 1 and the ship 1 sways in the roll direction and in the pitch direction at the same time, a pin is generated. Pin hole 1 located between holes 15a and 15b
By fixing the turning position of the turntable 12 using 5c, the casing 9 can be positioned in accordance with the direction of the external force, as shown by the chain double-dashed line, so that the effect of the vibration reduction device is maximized. It can be effectively utilized.

Next, FIGS. 4 and 5 show still another embodiment of the present invention. Instead of the method of fixing the turntable 12 with the lock pin 16 as shown in the above-mentioned embodiment, the turntable is shown. Rack 20 on the outer periphery of the lower surface of 12
Is provided in a ring shape, and the pinion 2 is attached to the rack 20.
2 is engaged, and the pinion 22 is attached to the shaft of the motor 21 as an actuator via the speed reducer 23, and the motor 21 is driven by the command from the control device 24 to rotate the pinion 22. The turntable 12 is rotated together with the turntable 20.

The control device 24 compares the roll angle detection sensor 25 and the pitch angle detection sensor 26 attached to the required parts of the ship 1 with the detection signals of the roll angle detection sensor 25 and the pitch angle detection sensor 26 and calculates them. A comparison calculator 27 for obtaining the maximum shaking direction and an amplifier 28 for amplifying the output of the comparison calculator 27 and sending a drive command to the motor 21.
And a pulse generator 29 for feeding back the rotation speed of the motor 21 to the amplifier 28.

In the case of the construction as shown in FIGS. 4 and 5, the roll angle detecting sensor 25 and the pitch angle detecting sensor 26 constantly detect the magnitudes of the roll angle and the pitch angle acting on the ship 1. The maximum swaying direction is obtained by the comparison calculator 27 from these detection signals, and the output control command is sent to the motor 21 via the amplifier 28. Therefore, as a result of the motor 21 being driven based on the control command to rotate the pinion 22 in the required direction, the turntable 12 is turned together with the rack 20 to the required angular position, and the longitudinal direction of the casing 9 is increased. Is automatically adjusted to the roll direction or the pitch direction, which is the maximum shaking direction of the ship 1, at that time, so that the shaking of the ship 1 is quickly suppressed.

In the above description, the comparison calculator 27 compares and calculates the swing angles in the roll direction and the pitch direction to move the casing 9 closer to the larger swing angle based on the ratio of the swing angles. By providing a function of issuing a command for arbitrarily selecting the turning position of the turntable 12 to the ship 1, for example, an external force acts on the ship 1 from an oblique direction to cause the ship 1 to move in the roll direction and the pitch direction. In the case where large shakes occur at the same time, the orientation of the casing 9 can be automatically adjusted to the optimum direction between the roll direction and the pitch direction in the maximum shake direction that combines the shakes in the roll direction and the pitch direction. As a result, it is possible to effectively reduce the roll-direction sway and the pitch-direction sway of the marine vessel 1 at the same time.

In the above-mentioned embodiment, the case where it is mounted on the roof 1a of the ship 1 is shown, but it may be mounted at other positions by using a mount or the like.
In the embodiment shown in FIGS. 1 and 2, the turntable 1
Although the case where the lock pin system is used as the positioning mechanism of No. 2 is shown, for example, the turntable 12 and the base 13 are used.
It is possible to adopt a method of driving a wedge between and,
In the embodiment shown in FIGS. 4 and 5, the turntable 1 is driven by the motor 21 via the pinion 22 and the rack 20.
2 shows the case where the rotary shaft 2 is rotated, the rotary shaft 14
The motor 21 may be provided on the top, or the turntable 12 may be rotated by using another actuator. Further, the side cross-sectional shape of the casing 9 is the shape shown in FIG. The shape is not limited, and may be, for example, a triangle, a hexagon, a rhombus, a circle, an ellipse, and the like, and the top plate 8 is not indispensable. Furthermore, a weight that moves in the casing 9 is used. It is needless to say that 4 may be a spherical or cylindrical shape that simply rolls on the bottom plate 2 and that various changes can be made within the range not departing from the gist of the present invention.

[0024]

As described above, the anti-sway device for a ship of the present invention exhibits the following excellent effects. (1) A casing having a bending member curved in a longitudinal direction so that a central portion thereof bulges downward is mounted on a ship via a turntable, and a weight is longitudinally mounted on the bending member of the casing. The positioning mechanism is movably mounted and has a positioning mechanism for fixing the turning position of the turntable so that the casing is oriented in any direction between the roll direction and the pitch direction. By selectively fixing the turning position of the turntable, the direction of the casing can be adjusted in both the roll direction and the pitch direction. Can be dealt with. (2) A roll-direction-fixing pin hole and a pitch-direction-fixing pin hole are formed at positions on the same circumference at an angle of 90 degrees from the turning center of the turntable. A lock hole is provided at the corresponding position on the ship side,
Moreover, if a positioning mechanism including a lock pin for inserting the lock table through any one of the above pin holes is used, the turntable positioning operation can be easily performed. (3) By forming another pin hole between the pin hole for fixing the roll direction and the pin hole for fixing the pitch direction, it can be shaken in any direction other than the roll direction and the pitch direction. Can be dealt with. (4) A turntable can be driven to rotate by an actuator, and a roll angle detection sensor that detects the roll direction swing of the ship and a pitch angle detection sensor that detects the pitch direction swing, and these roll angle detection sensor and pitch angle A comparison calculator which compares the detection signals of the detection sensors and sends a command to the actuator to select the turning position of the turntable so that the casing is aligned in the direction in which the swing is large in the roll direction and the pitch direction. With the configuration including the control device consisting of, the direction of the casing can be automatically adjusted to the direction in which the swing is large in the roll direction and the pitch direction, and the swing of the ship can be quickly reduced. . (5) A configuration in which the comparison computing unit has a function to issue a command to select the turning position of the turntable so that the casing is oriented in a direction that combines the magnitudes of both the roll direction and the pitch direction. By doing so, the casing direction can be automatically adjusted to the optimum direction between the roll direction and the pitch direction according to the degree of the shake in the roll direction and the pitch direction, and the shaking of the ship can be reduced more quickly. can do.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of a ship anti-sway device according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a schematic plan view showing another embodiment of the present invention.

FIG. 4 is a schematic side view showing still another embodiment of the present invention.

5 is a partially enlarged view showing details of FIG. 4. FIG.

6A and 6B are views showing an outline of an example of an anti-vibration device, in which FIG. 6A is a partially cut side view, and FIG. 6B is a vertical sectional view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ship 2 Bottom plate (curved member) 4 Weight 9 Casing 12 Turntable 14 Swivel shaft 15a, 15b, 15c Pin hole (positioning mechanism) 16 Lock pin (positioning mechanism) 17 Lock hole (positioning mechanism) 21 Motor (actuator) 24 Control device 25 Roll angle detection sensor 26 Pitch angle detection sensor 27 Comparison calculator

Claims (5)

[Claims] 1. A turntable is rotatably mounted on a ship, and a casing having a bending member curved in a longitudinal direction so that a central portion thereof bulges downward is installed on the turntable. A weight is movably mounted on the inner curved member in the longitudinal direction in which the curved member extends, and the longitudinal direction of the casing is adjusted to an arbitrary direction between the roll direction and the pitch direction of the ship. A ship anti-sway device having a configuration including a positioning mechanism for fixing a turning position of a turntable. 2. A pin hole for fixing the roll direction and a pin hole for fixing the pitch direction, the positioning mechanism being provided at a position on the same circumference that forms an angle of 90 degrees from the turning center of the turntable, 2. The anti-sway device for a ship according to claim 1, further comprising: a lock hole provided at a position so as to insert the lock pin through any one of the pin holes. 3. A pin hole for fixing in the roll direction and a pin hole for fixing in the pitch direction, which are provided at an angle of 90 degrees, are provided with another pin hole on the same circumference. Anti-sway device for ships. 4. A casing having a turntable mounted rotatably on a ship and having a bending member in the longitudinal direction, which is curved so that a central portion thereof bulges downward, is installed on the turntable. An actuator that mounts a weight on the inside of the bending member so as to be movable in the longitudinal direction in which the bending member extends and rotates the turntable is further provided, and further detects swinging of the ship in the roll direction. The roll angle detection sensor and the pitch angle detection sensor that detects the shake in the pitch direction are compared with the detection signals of the roll angle detection sensor and the pitch angle detection sensor to calculate the length of the casing in the direction in which the shake is large in the roll direction and the pitch direction. A comparison calculator that sends a command to select the turning position of the turntable to match the direction of the direction to the actuator. A ship anti-sway device having a configuration including a control device comprising 5. A function for issuing a command for selecting the turning position of the turntable so that the longitudinal direction of the casing is aligned with the direction in which the magnitudes of both the roll direction and the pitch direction are combined is compared and calculated. The anti-sway device for a ship according to claim 4, which is mounted on a vessel.