JPH036658Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a fence for preventing underwater pollution, which is used to surround water areas for dredging, land reclamation, and other underwater construction work, and to prevent the spread of pollutants.

[Conventional technology]

FIG. 4 shows a conventional fence for preventing underwater pollution, which is hung suspended underwater.

In the figure, C is a unit curtain made of water-permeable fabric or the like, with a float F attached to its upper end and a weight N attached to its lower end. The height of this curtain C is 2~10m, and the width is 10~
It is about 30m. The unit curtain C has holes 1 fitted with eyelets at both left and right ends thereof. A plurality of unit curtains C are connected by sequentially inserting a rope 2 from hole 1 of one curtain C to hole 1 of the other curtain C and tightening the ropes. R is an anchor rope for preventing movement of the connected unit curtain C, one end of which is attached to the upper end of the unit curtain C via a connecting belt, a connecting metal fitting, etc.
The other end is fixed to an anchor not shown. The height of the unit curtain C above the water surface is usually about 0.3 to 1.0 m. The float F supports the weight N, the unit curtain C, etc. in the water, and has the necessary buoyancy to ensure the height of the curtain C above the water surface (approximately 0.3 to 1.0 m above).

With this structure, when constructing a fence to enclose a construction area, prepare as many unit curtains as you need, connect them sequentially on the left and right sides, and hang them down into the water. Positioning can be done using the rear anchor rope R. In this way, not only pollutants in the water but also dredging,
It is possible to reliably prevent the outflow and diffusion of floating pollutants such as scum generated during landfilling. In addition, since a weight N is attached to the lower end of the unit curtain C, it is possible to prevent the curtain C from being lifted up by waves or the like, or from floating up and spreading pollutants.

[Problem that the invention attempts to solve]

However, in the case of such a conventional fence, the both ends of the unit curtain C are connected by ropes 2 over the entire area, so the fence is When the entire surface is subjected to excessive external force, the connecting portions where stress tends to concentrate may break.

Of course, in order to release this excessive external force, for example, the left and right end portions of the unit curtain C may be connected only at their upper end portions. However, in this case, the hem of each curtain C would dance, creating a gap below the connection, through which pollutants would flow out, and there was a risk that the function as a pollution prevention fence would be lost.

This invention was made to solve these conventional problems, and its purpose is to prevent the risk of damage even in times of strong winds and waves, and to prevent pollutants from flowing out. To provide a fence for preventing water pollution.

[Means for solving problems]

The fence according to this invention consists of a fence main body, which is made up of a plurality of unit curtains each having a float attached to the upper end and a weight attached to the lower end, connected at the upper ends of both left and right sides, and adjacent units in this fence main body. an auxiliary curtain that covers a gap that occurs below the connecting portion of the curtain;
The auxiliary curtain consists of an anchor rope attached to the upper end of the fence main body and an anchor connecting the anchor rope, and the auxiliary curtain is attached to the upper end of both unit curtains so that its upper end straddles the adjacent unit curtains. It is characterized by having a weight attached to its lower end.

〔Example〕

1 to 3 show an embodiment of this invention.

Figure 1 is a perspective view of the main part of the fence, showing the state in which it is suspended suspended in water. 2 and 3 are sectional views of the main parts thereof.

In the figure, the same reference numerals as in FIG. 4 indicate the same or corresponding parts. 11 is a hole provided at the upper end of the left and right sides of the unit curtain C, with eyelets attached;
Reference numeral 12 denotes a rope that connects both curtains C and C by sequentially inserting the rope from the hole 11 of one unit curtain C to the hole 11 of the other unit curtain C and tightening the rope. The connecting portions A of both curtains C, C are thus formed at the upper end portions on both the left and right sides.

T is an auxiliary curtain that covers the gap created between the two unit curtains C and C below the connecting portion A, and has a weight _N1 attached to its lower end.
The width of this curtain T is about 0.5 to 10 m. K,
Reference numeral K designates a pair of curtain attachment pieces sewn to each of the unit curtains C and C so that they appear parallel to each other below the connecting portion A of the unit curtains C and C in a connected state. A hole 13 in which an eyelet is attached is provided at the upper end of the auxiliary curtain T, and corresponding holes are also provided in the curtain mounting pieces K and K, although not shown. The auxiliary curtain T and the curtain mounting pieces K, K are the hole 13 of the former T and the latter K, K.
The ropes 14 are alternately inserted through the holes and tied together. The auxiliary curtain T is designed to be sagging at the center in the height direction when it is installed so that it can absorb external forces caused by movement of the unit curtain C in the width direction. Therefore, the positional relationship between the hole 13 of the auxiliary curtain T and the hole of the mounting piece K is also set in this manner. In addition, to attach the auxiliary curtain T to the unit curtain C,
Of course, it is also possible to use a connecting belt and a connecting fitting instead of the mounting piece K.

As described above, in this embodiment, the unit curtains C are connected only at their upper ends on both the left and right sides, and the gap between the unit curtains C, which occurs below the connection part A, is replaced by the connection part A.
The structure was such that it was covered with an auxiliary curtain T attached to the lower side. Therefore, the following effects are obtained.

(1) Even if a large external force is applied to the fence during strong winds or strong waves, the lower part of the unit curtain C from the connecting part A will not be affected by the weights N, N ₁
Even though it is hanging down, it is in a free state, so most of the external force can be absorbed and released by relative movement of the above-mentioned parts. Therefore, the external force applied to the connecting portion A is also reduced, and there is no possibility that the fence will be damaged at this portion.

(2) In addition, the lower part of the unit curtain C from the connection part A is free as mentioned above, so when there are strong winds or strong waves,
There is a risk that this part will open and pollutants will flow out from the gap. However, since this gap is covered by the auxiliary curtain T, the outflow of pollutants is prevented by this curtain T.

[Effect of idea]

As explained above, according to this invention, the unit curtains are connected only at the upper end portions on both the left and right sides, and the gap created below the connecting portion is covered by the auxiliary curtain hanging below the connecting portion. Therefore, even in times of strong winds and waves, there is no risk of damage and the outflow of pollutants can be prevented.

[Brief explanation of drawings]

Figure 1 is a perspective view of the main parts of an embodiment of this invention;
The drawings are a cross-sectional view taken from FIG. 1, FIG. 3 is a cross-sectional view taken from FIG. 2, and FIG. 4 is a perspective view of a conventional fence for preventing water pollution. In the figure, C is a unit curtain, T is an auxiliary curtain, F is a float, R is an anchor rope, A is a connecting portion, and N and _N1 are weights.

Claims (1)

[Scope of utility model registration request] A fence main body consisting of a plurality of unit curtains each having a float attached to the upper end and a weight attached to the lower end, connected at the upper ends of both the left and right sides, and a connecting portion of the adjacent unit curtains in the fence main body. The auxiliary curtain consists of an auxiliary curtain that covers the gap that occurs below, an anchor rope attached to the upper end of the fence main body, and an anchor that connects the anchor rope, and the auxiliary curtain has its upper end attached to an adjacent unit curtain. A fence for preventing water pollution, characterized in that it is attached to the upper ends of both unit curtains so as to straddle them, and a weight is attached to the lower ends of the curtains.