JP2815682B2 - Anti-pollution membrane - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pollution control membrane capable of effectively preventing a pollution liquid from diffusing.

<Conventional technology> Conventionally, in the offshore work such as dredging work and rubble work, the problem that silt or soil floats in seawater and spreads along the flow to cause marine pollution or damage the aquaculture industry. was there.

In order to prevent such marine pollution, the polluted liquid is
It is desirable to securely confine and settle in a certain water area before spreading to a clean area.

In order to prevent the diffusion of the contaminated liquid to the clean area, the contaminated area may be shielded from the clean area.
As shown in FIG. 5, a plurality of main bodies 20 each composed of a float 21 and a skirt 22 suspended from the float 21 are connected in series, and the main bodies 20 are connected to an anchor block 24 via a mooring rope 23. Various anti-pollution membranes have been provided which are moored so as to surround a polluted area.

In this type of anti-pollution membrane, a joint member 25 is provided at the top of a joint J where the main bodies 20 are connected to each other.

The joint member 25 is made of heavy metal,
It is provided corresponding to the top of 22.

On the other hand, the skirts 22 at the lower portion of the joint member 25 connect skirt connection fittings 27 provided at predetermined intervals on both ends thereof, and joint belts 22a provided along both ends of each skirt 22. Are connected by sewing with a joint rope 28.

A pair of mooring ropes 23 each having an anchor block 24 attached thereto are connected to the joint member 25 via mooring fittings 26 on both front and back sides of the main body 20.

The float 21 is a cylindrical float cover 21.
A large number of buoyancy bodies 21b are accommodated inside a.

<Problems to be Solved by the Invention> By the way, in the above conventional anti-pollution membrane, (1)
The joint part J is provided with a heavy joint member 25 and a plurality of skirt connection fittings 27 in a concentrated manner. Therefore, the weight of the joint part J is heavy. (2) The joint part J is a mooring point. , Body 20
The joint member J is pulled downward when it is moved by waves, tides, etc. (3) It is necessary to secure the degree of freedom of the pollution prevention film so that it can follow the waves, tides, etc. Since a certain amount of clearance is required between them, there is almost no buoyancy applied to the joint J.
However, there is a problem that the water is easily immersed in the water and the contaminated liquid flows out to the clean area with the immersion.

Further, when the joint J is submerged, the buoyant body 21b accommodated in the float 21 is moved toward the center of the main body 20 (in a direction away from the joint J) by the buoyancy acting on the buoyant body 21b, As a result of the further decrease in the buoyancy near the part J, a vicious cycle of submergence → reduction in buoyancy → increase in submerged area occurred.

Further, in a submerged portion where the buoyancy of the buoyant body 21b no longer acts, there is a problem that the joint member 25 and the mooring fitting 26 come into contact with the float cover 21a and the skirt 22 and break them.

To solve these problems, joint members
It is conceivable that the mooring fitting 26, the skirt connection fitting 27, and the like are formed of a lightweight metal.

However, if these are broken, the pollution prevention membrane main body is washed away, or a cut is formed between the skirts 22 and the polluted area cannot be shielded from the clean area, so that the joint member 25, the mooring fitting 26, the skirt The connection fitting 27 and the like must be excellent in strength and wear resistance. Therefore, the mooring fitting 26 is inevitably a heavy one made of steel or the like, and a reduction in weight cannot be expected.

Then, this invention was made in order to solve the above-mentioned problems, and prevents submergence of a joint part,
An object of the present invention is to provide an anti-pollution film capable of reliably shielding a polluted area from a clean area.

<Means for Solving the Problems> The anti-pollution film of the present invention connects a plurality of main bodies each composed of a skirt for preventing the diffusion of the contaminated liquid and a float for preventing the skirt from sinking in series via a joint member. Then, in the anti-pollution film for mooring the main body via a mooring rope, mooring brackets are attached to positions on both sides of the joint member of the main body and spaced apart from the joint member by a predetermined distance, and each mooring bracket is mounted halfway. The branch side of the branched mooring rope is connected.

Further, the mooring fitting is preferably composed of a substrate fixed to the main body and an annular member attached to the substrate so as to be rotatable around a vertical axis.

<Operation> According to the anti-pollution film having the above structure, the mooring rope branched from the middle is connected to the main body through the mooring fittings attached to both sides of the joint member. Is not concentrated at one point but is dispersed. In addition, since the mooring fittings are attached to both sides of the joint member, the buoyancy of the float sufficiently acts near the mooring fittings, and the concentration of the load on the joint portion is reduced.

In particular, when the mooring fixture is composed of a substrate fixed to the main body and an annular member rotatably mounted on the substrate so as to be rotatable about a vertical axis, the annular member is used to deform or move the main body. Because it can be rotated following
The main body can be moored without difficulty.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of an essential part showing an embodiment of a pollution control film of the present invention.

In FIG. 1, reference numeral 1 denotes a skirt suspended vertically in water. The skirt 1 is formed by connecting a plurality of rectangular canvases made of polyester flat fiber in series, and a reinforcing belt 4 is stretched around the skirt 1 vertically and horizontally.

The upper end of the skirt 1 is connected to a float 2 for preventing the skirt 1 from sinking.

The float 2 has a plurality of columnar buoyant bodies 2a (shown by broken lines) made of polystyrene foam housed in a float cover made of tarpaulin.

A number of belts 10 are provided at both ends of the float 2, and the belts 10 are bound by ropes 3 to prevent the buoyant body 2a in the float 2 from jumping out.

The skirt 1 and the float 2 constitute a main body 16, and a plurality of the main bodies 16 are connected in series to form a pollution prevention film.

The shackle 6 and the connection fitting 7
This is mainly performed by a joint member 12 consisting of As shown in FIG. 2, the shackle 6 connects the connection fittings 7 provided on both sides of the front surface and the rear surface of the float 2 to each other. Further, the connection fitting 7 is provided on a plate-like substrate 71 by a D-shaped ring.
72 is attached. The connection fitting 7 is attached to a tension belt 17 provided at a boundary between the skirt 1 and the float 2.

The connection between the main bodies 16 is further strengthened by connecting the shackle 6 on the front side and the shackle 6 on the rear side with a ring-shaped bracket 13.

Joints 14 and eyelets are provided at both ends of each skirt 1, and the skirts 1 are connected by sewing each eyelet with a joint rope 11. Further, of the reinforcing belts 4 stretched around the skirt 1, a skirt connecting metal 9 is provided at an end of the reinforcing belt 4 provided in parallel with the float 2, and the skirt 1 is provided by the skirt connecting metal 9. Each other is connected more firmly.

The mooring fittings 5 are attached to both sides of the tension belt 17 across the joint member 12. The mooring fitting 5 is provided at a position where the buoyancy of the buoyant body 2a sufficiently acts. Each mooring fitting 5 has a D-shaped ring 5b as an annular member near one end of a rectangular plate-shaped substrate 5a, and a cross section of approximately Ω.
It is configured to be attached with a letter-shaped holding plate 5c (No. 3
The substantially D-shaped ring 5b is rotatable about a vertical axis with respect to the substrate 5a.

As shown in FIG. 4, the D-shaped ring 5b has an upper part 15a.
And a lower portion 15b and a transition portion 15c may be used,
In this case, since the legs are prevented from being opened in the vertical direction (the directions of arrows B and C in the figure), the strength is increased.

Note that the mooring fitting 5 has sufficient strength to moor the main body 16 by itself. In this case, since the mooring fitting 5 is provided at a position separated from the joint portion J of the main body by a predetermined distance, a sufficient buoyancy of the float 2 acts on the mounting position of the mooring fitting 5 even if the mooring fitting 5 is heavy. There is no danger that the mooring point will be submerged.

Further, since the mooring fitting 5 is rotatable around the vertical axis with respect to the substrate 5a, the mooring fitting 5 can be rotated following the deformation and play of the main body 16, and the main body 16 can be moored without difficulty.

A mooring rope 8 is connected to the mooring fitting 5. This mooring rope 8 has a configuration in which two sub-wires 8a, 8a are converged on a main wire 8c via a ring 8a, and each wire 8a, 8c is coated with a resin coating for rust prevention. It has been subjected.

A U-shaped ring 8d is connected to both ends of each of the wires 8a and 8c.
Each of them is connected to a D-shaped ring 5d of the mooring fitting 5 via a D-shaped ring 8d.

On the other hand, the leading end of the main wire 8c is connected to the ring 8b via a U-shaped ring 8d, and the other end is connected to a sub-float. An anchor block made of concrete or the like as a weight is connected to the sub-float via an anchor wire.

As described above, since the mooring rope 8 is connected to the main body 16 at two points for each joint portion J, the tensile force acting on the main body 16 from the mooring rope 8 can be dispersed.

In addition, the mooring fitting 5 is connected to the mooring rope 8 by a D-shaped ring.
5b and the substantially U-shaped ring 8d, in addition to the degree of freedom in the left and right lateral directions of the substantially D-shaped ring 5b, the substantially U-shaped ring 8d
The upper and lower degrees of freedom of the main body 16 are added, and the main body 16 can cope with the movement in all directions with respect to the fixed anchor.

With the above configuration, the buoyancy of the float 2 acts on the pollution prevention film at each joint J. In addition, since the mooring point is moored at two mooring points, the load per mooring point is reduced, and submersion at the mooring point is prevented. Therefore, even when a large load during abnormal sea conditions or long-term use, the concentration of weight on the joint J is dispersed,
There is no danger of submersion near the mooring point.

This also eliminates the possibility that the joint member 12 and the mooring fitting 5 come into contact with the float cover 2b and the skirt 1 and damage them.

Note that, in the above embodiment, the mooring rope 8 is shown to be branched into two and connected to the main body via two mooring fittings. For example, when three branches are used, one of them can be connected to the shackle 6 of the main body.

<Effects of the Invention> As described above, according to the pollution control membrane of the present invention, the mooring member is attached at a position separated by a predetermined distance from the joint member on both sides of the joint member of the main body, and branched off in the middle. Since the branch side of the mooring rope is connected,
While the buoyancy of the float acts sufficiently near the mooring member,
The dispersion of the load of the joint part and the dust prevent the joint part from being submerged, the submerged part of the float does not occur, and the polluted area can be completely shielded from the clean area.

Further, since no submerged portion is formed on the float, it is possible to prevent the joint member or the like from contacting the float cover or the curtain and damaging them.

In the case where the mooring bracket is composed of a substrate fixed to the main body and an annular member rotatably mounted on the substrate so as to be rotatable around a vertical axis, the annular member is made to follow movements of waves, tides, and the like. It can be rotated to prevent an excessive load from being applied to the vicinity of the mooring fitting mounting portion, and the main body can be moored without difficulty.

[Brief description of the drawings]

1 is a perspective view of a main part showing a pollution control membrane of the present invention, FIG. 2 is a side view of the main part, FIGS. 3 and 4 are top views of the main part, and FIG. 5 is a conventional pollution control membrane. FIG. 1 ... skirt, 2 ... float, 5 ... mooring fitting, 8 ... mooring rope, 12 ... joint member, 16 ... body

Claims (2)

(57) [Claims] 1. A main body comprising a skirt for preventing diffusion of a contaminant and a float for preventing settlement of the skirt are connected in series via a joint member, and the main body is moored via a mooring rope. In the anti-pollution membrane, the mooring brackets are attached at positions on both sides of the joint member of the main body and at a predetermined distance from the joint member, and the branch side of the mooring rope branched from the middle is connected to each mooring bracket. An anti-pollution membrane characterized by the following. 2. The anti-pollution film according to claim 1, wherein the mooring fitting comprises a substrate fixed to the main body, and an annular member rotatably mounted on the substrate so as to be rotatable about a vertical axis.