JP2005313849A - Undersea fence - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means for preventing invasion into a vessel moored alongside the pier and preventing such terrorism that a vessel's hull is exploded by a terrorist who invades from the sea. <P>SOLUTION: Intermediate floats having predetermined length are successively connected to an upper end of a shock-absorbing screen and are mounted to meet to the whole length of the shock-absorbing screen to balance buoyancy of the intermediate floats and weight of the shock-absorbing screen. A plurality of thus obtained intermediate floats and the shock-absorbing screens are alternately combined and connected. Further, upper floats 8 having predetermined length are successively connected to the shock-absorbing screen to mount it to meet to the whole length of the shock-absorbing screen. The shock-absorbing screen is connected to the intermediate float at an upper end and the respective upper floats 8 are communicated by a communication pipe. Air and water (sea water) can be fed into the respective floats by the communication pipe. The shock-absorbing screen is stretched and laid in a curtain shape by feeding of air and surrounds the vessel anchored alongside the pier along a pier. The whole of the shock-absorbing screen is sunk to the sea bottom by feeding water and anchoring alongside the pier and leaving the pier of the vessel can be realized. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an underwater fence for preventing invasion and destructive activities from the sea to a ship anchored at a wharf.

For ships moored at the wharf, amendments to the Annex to the Maritime Life Safety Convention (SOLAS Convention) have been adopted, and strengthening of security measures is obligatory. Therefore, a hot water discharge pipe is arranged around the upper deck of the ship as a device for preventing intrusion into the ship, and when hot water is detected, hot water is discharged from the discharge port (see, for example, Patent Document 1). .)
JP 2002-37179 A

However, the above-described conventional technique has a problem of preventing the intrusion into the ship, and does not give consideration to the terrorism in which the hull is blown up by a bandit entering from the sea.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide means for surrounding a ship that is berthing from the sea side.

Therefore, the present invention sequentially connects an intermediate float of a predetermined length to the upper end of the buffer net and attaches it according to the total length of the buffer net so that the buoyancy of the intermediate float and the weight of the buffer net are balanced. A plurality of pairs of intermediate floats and buffer nets are alternately combined and connected, and an upper float of a predetermined length is sequentially connected to the buffer nets and attached to the total length of the buffer nets, and the buffer nets are attached to the upper intermediate floats. , Each upper float is connected with a communication pipe, and air and water (seawater) can be supplied into each upper float through the communication pipe. The ship is enclosed along the quay and water is supplied to sink the entire buffer network to the sea floor, enabling the ship to berth and leave.
Further, in the above-described configuration, the buffer net is filled with a metal chain in a support made of an elastic body, and the support is interposed between the rings constituting the chain so that the rings and the rings are not in direct contact with each other. It is characterized by comprising the cushioning material made.

  Thereby, this invention can prevent the approaching from the sea side with respect to the ship which is berthing, and the effect that it can delay approaching is acquired.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an overall explanatory view showing an embodiment of the present invention, FIG. 2 is a partial explanatory view of a fence, and FIGS. 3 and 4 are broken explanatory views of cushioning materials.
1 is a buffer net. As shown in FIGS. 3 and 4, the buffer material 2 constituting the buffer net 1 has a metal chain 4 embedded in a support 3 made of an elastic material such as natural rubber, synthetic rubber, or synthetic resin. This embedded state is a state in which the metal ring constituting the chain 4 and the ring are not directly in contact with each other, the support body 3 is interposed therebetween, and the support body 3 is also enriched in the inner diameter of each ring. It has become.

In this embodiment, the mesh of the buffer net 1 formed in this way is approximately 15 cm square, but it is not necessarily square, and its shape is arbitrary, but it can prevent human intrusion. There must be.
Reference numeral 5 denotes an intermediate float, and the outer surface of a pipe body closed at both ends with a closing plate 6 at both ends is covered with an elastic body such as natural rubber, synthetic rubber, or synthetic resin.

  The length and diameter of the intermediate float 5 are such dimensions that the weight of the buffer net 1 connected thereunder can be supported by its buoyancy and can be balanced, and the intermediate float 5 having such a predetermined length and diameter. As shown in FIG. 5, the end face of the intermediate float 5 is closed by a connecting body 7 in which connecting portions 18 such as connecting plates are attached to connecting chains at both ends of a buffer body composed of an elastic body and a chain similar to the buffer body 2 described above. The plate 6 is sequentially connected to the plate 6 by a connecting tool such as a bolt and a nut, welding, or the like, and is attached to the entire length of the buffer net 1 to be integrated.

Such an intermediate float 5 is arranged at a predetermined interval in the height direction of the buffer net 1 and approximately every 3 m in this embodiment, and the buffer net 1 and the intermediate float 5 are alternately combined to form the whole underwater. Can be placed in a curtain shape.
The underwater fence arranged in this way has a balancer 15 protruding in the longitudinal direction between 90 degrees (horizontal) from the lower end of the outer periphery of each intermediate float 5 in order to sink when the ship berths and berths, As shown in FIG. 6, the buffer net 1 can be folded and sunk as shown in FIG. 7 by sequentially positioning the protruding positions in the front-rear direction from the top.

8 is an upper float, and like the intermediate float 5, the outer surface of a metal tube or the like whose both ends are closed by a closing plate 9, and the inner surface as required is an elastic body such as natural rubber, synthetic rubber or synthetic resin. The rustproof body is covered with the above, and when this is attached to the buffer net 1 at the upper end, it becomes a submarine fence.
The length and diameter of the upper float 8 are dimensions that can support the weight of the buffer net 1 connected thereunder by buoyancy, and the upper float 8 having a predetermined length and a predetermined diameter is as shown in FIG. A bolt 11 and a nut etc. are attached to the closing plate 9 on the end face of the upper float 8 by a connecting body 11 in which connecting portions 10 such as connecting plates are attached to connecting chains at both ends of the buffer body consisting of an elastic body and a chain similar to the buffer body 2 Are sequentially connected to each other by the couplers to match the entire length of the buffer net 1.
Furthermore, the connection part seal-connects the edge part of the mutually opposing upper float 8 with the sealing tool 12 as needed. In this sealing tool 12, the outer peripheral surface of a metal bellows-like cylinder is covered with an elastic body such as natural rubber, synthetic rubber, or synthetic resin, and both ends thereof are bolts or the like at the ends of the upper float 8, respectively. The connecting portion is in a flexible state having water-tightness by being fixedly adhered to each other by the locking tool.

Further, the adjacent upper floats 8 are in communication with each other by a communication pipe 13 made of a flexible material such as rubber or synthetic resin, and air or water (seawater) is sent into each upper float 8. Can be done. If the communication pipe 13 is also made of a composite material made of a bellows-like metal pipe and an elastic material such as rubber, the sealing tool 12 may be omitted.
The upper float 8 at one end is connected to an air supply device such as a compressor provided on land by an inflow pipe 14 and an injection device 20 for injecting water (seawater). The air supply and injection inflow pipes 14 may be independent from each other, or may be used as a single unit. In the case of combined use, the air supply device and the injection device are used for each of intake and intake. You can just pass the inlet. The inflow pipe is composed of a metal bellows or a composite pipe covered with rubber or the like in order to protect it from cutting or breaking.

Further, a discharge hole 16 for removing the air and water injected in this way is provided in the upper float 8 at the other end.
Ideally, the lower end of the buffer net 1 is required to reach the seabed, and the lower end is within the ground of the seabed. Therefore, although the weight foundation is shown in drawing, it is good to cast an anchor pile in the ground and integrate the buffer net 1 in the anchor pile.

Reference numeral 17 shown in FIG. 9 denotes a sensor attached to the upper float 8. Such a sensor may be appropriately attached not only to the upper float but also to an intermediate float and a buffer net. This sensor 17 detects a person or an object approaching or touching, and activates an alarm device (not shown).
Further, the water surface changes as shown in FIG. 10 due to differences in tidal range, traveling waves, waves, and the like. Therefore, the connecting portion between the uppermost intermediate float immediately below the upper float 8 and the buffer net 1 may be a hinge structure or a structure in which a groove is formed in a direction displaced to the elastic material.

  Because this underwater fence has a floating structure, it cannot be completely fixed to the quay. Therefore, as shown in FIG. 11 and FIG. 12, the contact portion with the quay is provided with a guide guide 19 inclined in a bowl shape at a position where the upper float 8 does not contact at high tide, and the upper float 8 is separated at low tide. Try not to shore. Since this guide guide 19 has a severe corrosive environment, it is desirable to use rubber or synthetic resin.

The underwater fence with the above configuration surrounds the sea area around the ship along the quay as shown in FIG. 1 when the ship is berthing. It will sink.
As described above, in the underwater fence, each buffer net 1 partitioned by the intermediate float 5 is balanced in buoyancy by the intermediate float 5, and the whole is stretched in a curtain shape by the buoyancy of the upper float 8. If you add water (seawater), it will sink. Therefore, the buffer net 1 is floated and lowered by putting air into the upper float 8 or water (seawater).

Therefore, when the ship berths or leaves the shore, water (seawater) is injected into each upper float 8 through the inflow pipe 14 so that water is injected into the upper float 8 and at the same time the air in the upper float 8. Will escape from the discharge hole 16 and the buoyancy of the upper float 8 will decrease, and the buffer net 1 will sink together with the intermediate float 5.
At this time, as shown in FIG. 7, the buffer net 1 is folded and fits on the seabed in a small area by the balancers 15 formed alternately on the intermediate floats 5. At this time, the inflow pipe 14 is extended to the seabed as the upper float 8 sinks.

In this way, the berthing of the ship is performed in the state where the buffer net 1 is in the seabed.
When the berthing / leaving is completed, the buffer net 1 is stretched like a curtain. In this case, air is injected into the upper float 8 through the inflow pipe 14. By press-fitting the air, the water in the upper float 8 escapes from the discharge hole 16 and is filled with air and floats. Floating on the sea surface, the underwater fence is stretched like a curtain so as to surround the ship on the shore.

Even after this tensioning, air continues to be sent into the upper float 8 and the air escapes from the discharge hole 16. In this case, since the air supply only maintains the buoyancy of each upper float 8, a very low air pressure is required.
In addition, a sealed type that does not form a discharge hole in the upper float may be used. There is a risk that this may be undesirable for prevention.

  As described above, the buffer body 2 constituting the underwater fence buffer net 1 stretched in a curtain shape is covered with an elastic body so that the metal chain can be expanded and contracted, and is buffered by the movement of seawater. Since the support 3 constituting the net 1 has a slight expansion and contraction action, there is no adhesion of marine organisms, and the mesh is not blocked to increase the resistance of wave power or increase the weight. Maintenance work is extremely easy.

  In addition, when trying to cut the buffer net 1 for the purpose of entering the underwater fence stretched in a curtain shape, the cross section of the buffer net is elastic because the support is an elastic body and the chain is a rigid body. Rigidity-elasticity-rigidity-elasticity is required, and complicated cutting work is required. In other words, with a sharp blade, the elastic material can be cut, but the metal is difficult to cut. On the other hand, in order to cut the elastic material with a tool with a thick blade that cuts the metal, it must be cut while rotating the tool. When it is moved, the rotation is not successful due to the adhesion of the elastic body, and it takes a very long time to cut. It takes a long time to cut a plurality of places in order to make a hole of a size that allows a person to pass through any destruction device.

Overall explanatory diagram showing an example Fence partial explanatory diagram Cross-sectional enlarged explanatory view showing the state of the support and chain Cross-sectional enlarged explanatory diagram showing the state of the support and chain at the intersection Explanatory drawing of intermediate float connection Side view of tensioned state Side view of the folded state Explanatory drawing of connection part of upper float Explanatory drawing showing sensor mounting status Illustration of sea level due to tidal difference Side view of the guide Plane explanatory diagram of the guide

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Buffer net 2 Buffer material 3 Support body 4 Chain 5 Intermediate float 6 Closing plate 7 Connection body 8 Upper float 9 Closing plate 10 Connection part 11 Connection body 12 Sealing tool 13 Communication pipe 14 Inflow pipe 15 Balancer 16 Exhaust hole 17 Sensor 18 Connection Guide 19 Guide
20 Injection device

Claims (2)

An intermediate float of a predetermined length is sequentially connected to the upper end of the buffer net, and is attached according to the total length of the buffer net so that the buoyancy of the intermediate float and the weight of the buffer net are balanced. A plurality of sets of buffer nets are alternately combined and connected, and an upper float of a predetermined length is sequentially connected to the buffer net and attached to the entire length of the buffer net, and the buffer net is connected to the intermediate float at the upper end. The upper float is connected with a communication pipe, and the communication pipe enables the supply of air and water (seawater) into each upper float. An underwater fence characterized by enclosing along the quay and supplying water to sink the entire buffer network to the bottom of the sea, enabling ships to berth and leave. 2. The shock absorber according to claim 1, wherein a metal chain is provided in a support made of an elastic body, and the support is interposed between adjacent rings constituting the chain so that the rings do not directly contact each other. A submarine fence characterized by being made up of substantial cushioning materials.