JPH0556794U - Anti-sway device for ships - Google Patents

Abstract

(57) [Summary] [Structure] A wing 7 for suppressing swinging of the hull 1 is attached to a support shaft 5 which is rotatably inserted and supported in a recess 3 formed in a hull skin 1a so as to be rotatable in a horizontal direction. A cylinder device 12 for swinging the blades is provided through a swing lever 8 attached to the support shaft body, and the cylinder device is provided through a support link 10 arranged along a hull outer plate. The anti-sway device 2 for a ship, in which a stopper member 13 supported on the support shaft side and restricting the swing of the support link is attached to an inner surface of a hull outer plate. [Effect] Since the cylinder device that supports the wing via the swing lever is supported by the support member that is arranged in a portion with a relatively large space along the inner surface of the hull outer plate, the moment generated by the wing is supported. It is possible to take a long distance, and therefore the force acting on the outer plate of the hull can be reduced even in a small ship.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an anti-vibration device for reducing the sway of a hull, for example, when the ship is anchored.

[0002]

[Prior Art]

 Generally, when a ship anchors on the sea, the hull sways (rolls) due to waves. Particularly, in a small ship, its swinging is large, and in order to prevent such swinging of the hull, there is one in which a vibration damping device is attached to both sides of the hull.

[0003] Conventionally, this type of anti-sway device has been known as a flat hull attached to both sides of a hull so that it can be swung outwardly, and the hull via a swing lever. It is composed of a cylinder device that swings between a storage position along the sea surface and a use position that projects below the sea level.The cylinder body side of this cylinder device has a pin directly attached to the inner surface of the hull skin. Was supported through.

[0004]

[Problems to be solved by the device]

 According to the above-described conventional configuration, the cylinder body of the cylinder device that swings the wings is directly supported on the inner surface of the outer shell of the ship, so when the hull swings, the moment due to the force applied to the wings causes the cylinder device to move. The acting force is inversely proportional to the length of the rocking lever. Therefore, the force applied to the hull skin also depends on the length of the rocking lever, so the rocker lever should be long.

However, when the ship is small, since the engine is arranged in the lower part of the hull, it is not possible to lengthen the swing lever protruding inward, and therefore a large force is applied to the hull. Is a big problem especially when the hull is made of aluminum.

Therefore, an object of the present invention is to provide an anti-sway device for a ship that can solve the above problems.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the first means of the present invention is to form a recess in a hull outer plate, and to swing the hull on a support shaft body that is rotatably inserted and supported in the recess and horizontally rotatably. A wing to suppress the wing, a lever body protruding to the side opposite to the wing is attached to this support shaft, and a support member whose one end is rotatably supported is arranged along the inner surface of the hull outer plate. A cylinder device is attached between the other end of the support member and the tip of the lever body, and a stopper member for restricting swinging of the support member side supporting the cylinder device with respect to the support shaft body is provided outside the hull. This is the anti-sway device for ships attached to the inner surface of the plate.

A second means of the present invention is that the stopper member in the first means is provided with a pair of restriction plates and a guide plate provided between the restriction plates and on the support member side. The anti-sway device for a ship comprises a guide rod inserted into a formed guide hole, and a spring body mounted between the guide plate and each of the control plates.

[0009]

[Action]

 According to the above configuration, the cylinder device that supports the wing via the swing lever is supported by the support member that is arranged along the inner surface of the hull outer plate and has a relatively large space. The distance to support the moment generated by can be long. For this reason, the force acting on the hull skin is small even for a small ship.

Further, since the spring body is arranged on the stopper member that supports the support member on the outer plate side of the hull, the impact force transmitted to the hull is weakened by the spring body when the hull is rocked, for example. Due to the action of the spring body, the wing itself also slowly swings, and the swing of the hull is effectively suppressed.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. Reference numeral 1 denotes, for example, the hull of a small boat, and both sides of the hull are provided with anti-sway devices 2 for suppressing the shaking of the hull 1, respectively.

The anti-sway device 2 is inserted horizontally and longitudinally in a pair of recesses 3 formed in the front and rear of a hull skin 1 a and in the hull 1 between these recesses 3, 3. A support shaft 5 rotatably supported via a bearing 4 mounted on the first side, and a flat plate-shaped support shaft 5 mounted on the support shaft 5 corresponding to the recesses 3 and 3 via a mounting bracket 6. The wing 7, the swing lever (lever body) 8 fixed to the support shaft 5 at the position between the recesses 3 and 3, that is, the position inside the hull 1, and the support shaft at one end on both sides of the swing lever 8. A pair of supporting links (supporting members) 10 that are rotatably supported by the body 5 and have their other ends connected to each other by a connecting shaft body 9, and are attached to the tip ends of the rocking levers 8. Mounted between the connecting pin 11 and the connecting shaft body 9 It is composed of a cylinder device (hydraulic or pneumatic cylinder) 12 and a stopper member 13 for restricting the swing of the cylinder device 12, that is, the support link 10 around the support shaft 5.

The stopper member 13 is disposed between the upper and lower restriction plates 21 fixed to the hull outer plate 1a side at the left and right positions of the respective support links 10, and between these restriction plates 21 to support each support. A guide rod 23 inserted into a through hole (guide hole) 22a formed in a guide plate 22 projecting from the outer surface of the link 10, and a guide plate 23 that is externally fitted to the guide rod 23. It is composed of compression springs (spring bodies) 24 mounted between the restriction plates 21 on both sides thereof.

In the above structure, during navigation, the piston rod 12a of the cylinder device 12 is projected so that the wing 7 is stored in the storage recess 1b formed on the outer surface of the hull 1, as shown by the solid line in FIG. It has been set to the state.

When the ship is moored, the piston rod 12 a of the cylinder device 12 is retracted, and the wings 7 are located outside the hull 1, that is, below the water surface, as shown by the phantom line in FIG. Is projected to.

Then, in this state, when the hull 1 tries to swing, a resistance force of seawater acts on the wings 7, and a resistance moment is generated around the support shaft body 5, so that the swing of the hull 1 is suppressed. Further, the resistance moment is transmitted to the supporting link 10 via the cylinder device 12, and finally received by the hull outer plate 1a via the compression spring 24 and the regulating plate 21.

Here, when the force F ₂ applied to the hull skin 1a is obtained, the following formula (1) is obtained. F ₂ = F ₁ × L ₁ / L ₂ (1) However, in the equation (1), F ₁ is the force acting on the blade L ₁ : The distance between the acting point of F ₁ and the center of the supporting shaft L ₂ : Distance between the center of the regulation plate and the center of the support shaft As described above, the swing lever 8 cannot be lengthened in the hull 1, but the upper space portion along the hull outer plate 1a has a relatively large space. Therefore, by arranging the supporting link 10 in this portion, its length can be made relatively long. Therefore, the force acting on the hull skin 1a should be made smaller than in the conventional case. You can

Further, when the hull 1 swings, the impact force transmitted to the hull 1 is weakened by the compression spring 24, and the action of the compression spring 24 also causes the wings 7 themselves to swing slowly. The swinging of the hull 1 can be effectively suppressed.

[0019]

As described above, according to the configuration of the present invention, the cylinder device for supporting the wing via the rocking lever is arranged along the inner surface of the hull outer plate, that is, in a portion with a relatively large space. Since it is supported by the supporting member, the distance for supporting the moment generated by the wing can be increased, and therefore the force acting on the hull skin can be reduced even in a small ship.

In addition, since the spring body is arranged on the stopper member that supports the support member on the outer plate side of the hull, the impact force transmitted to the hull is weakened by the spring body when the hull is rocked, for example. Due to the action of the spring body, the wing itself swings slowly, so that the swinging of the hull can be effectively suppressed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an anti-vibration device according to an embodiment of the present invention.

FIG. 2 is a view on arrow AA of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hull 1a Hull outer plate 2 Shaking device 3 Recess 5 Support shaft 7 Wing 8 Swing lever 10 Supporting link 12 Cylinder device 13 Stopper member 21 Restriction plate 22 Guide plate 22a Through hole 23 Guide rod 24 Compression spring

Claims (2)

[Scope of utility model registration request] 1. A support shaft body having a recess formed in a hull outer plate and being rotatably supported in the recess so as to be rotatable in the horizontal direction. A lever body projecting to the side opposite to the wing is attached to the body, and a support member whose one end is rotatably supported is arranged along the inner surface of the outer plate of the hull, and the other end of this support member and the tip of the lever body. And a stopper member for restricting swing of the support member side supporting the cylinder device with respect to the support shaft body on the inner surface of the hull outer plate. Shaking device. 2. A stopper member, a pair of restriction plates, a guide rod inserted between guide plates formed in a guide plate provided between the restriction plates and on the support member side, and the guide. The anti-sway device for a ship according to claim 1, wherein the anti-sway device comprises a plate and a spring body mounted between the restricting plates.