JPH0414497Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pollution diffusion prevention device that prevents pollution from spreading in water during grab dredging.

[Conventional technology]

When carrying out grab dredging, the area to be dredged is surrounded by a curtain to prevent pollution diffusion, and the conventional dredging device consists of a curtain hanging from a float and a weight placed at the tip of the dredging device. 1982-
He is known for his invention of 48423 concerning a dredger with a frame for preventing pollution diffusion.

However, in this case, when dredging earth and sand, the tip of the pollution diffusion prevention curtain may be grabbed with a grab bucket, damaging the prevention curtain, or if there is a tidal current.
There was a problem that the prevention curtain was washed away and became an obstruction, making it impossible to dredge in designated areas.

[Problems to be solved by the invention] The present invention was made to solve the problems of the conventional methods, and does not interfere with dredging work.
The problem to be solved is to provide a pollution diffusion prevention device that will not be washed away by currents.

[Means to solve the problem]

An upper frame member and a lower frame member each having a curtain material stretched through a hinge are installed below the float floating on the water surface surrounding a predetermined area, and the lower frame member is The degree of refraction can be adjusted with a rope, and it consists of a pollution diffusion prevention device that connects a winch on a work boat and a frame member or hinge with a rope.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. Fig. 1 is a side sectional view of a pollution diffusion prevention device according to an embodiment of the present invention, and Fig. 2 is an embodiment 2 when used in a place with tidal currents. Figure 2 is a side sectional view of the device shown in Figure 1.
FIG. 3 is an enlarged plan sectional view of the main part of the apparatus shown in the figure, and FIG. 3 is a side sectional view taken along the line A--A in FIG.

First, this device is installed in a predetermined area of water to be dredged, and as shown in FIGS. 2 and 3, it is placed below a float 1 floating on the water surface W, L surrounding this predetermined area. , an upper frame member 2A is extended, and a lower frame member 2B is further provided at the lower end of the frame member 2A via a hinge 3,
Through this hinge 3, the upper frame member 2A and the lower frame member 2B can be freely bent in the middle.

Furthermore, a curtain material 4 is stretched on the outside or inside of these upper and lower frame members 2A and 2B.

Furthermore, a flexible curtain material 7 is hung from the lower end of the lower frame member 2B via a hinge 6.

Incidentally, an upper frame member 8 is provided on the upper part of the float 1, and a hook is attached thereto for lifting and storing the device.

Next, each of the above-mentioned hinges 3 and the lower frame member 2
Either or both of the lower ends of B
As shown in the figure, it can be raised and lowered from above using a winch 11 provided on the upper frame member 8 or the work boat 10 via each rope 9.

When the pollution diffusion prevention device of the present invention having the above-mentioned configuration is normally used, the device is first placed at a position where dredging work is to be performed, as in the embodiment shown in FIG.

At this time, the upper frame member 2 on which the curtain material 4 is stretched
A, the lower frame member 2B is connected via its hinge 3, and a rope 9 is attached to the lower end of the lower frame member 2B.
By operating the winch 11, it is possible to match the unevenness of B on the seabed surface as shown in FIG. 1.

In addition, the lower frame member 2B is the upper frame member 2B.
Since it extends outward from A, when the grab bucket 12 grabs the earth and sand on the seabed B, it does not grab the curtain material 4 or the lower end of the flexible curtain material 7.

In the embodiment, the lower end of the lower frame member 2B is connected to the rope 9, but the rope 9 may be connected at any position on the lower frame member 2B.

Next, when using this pollution diffusion prevention device in a place where there is a tidal current W,
0 in the direction shown in the diagram relative to the current W,
The hinge 3 is attached by the winch 11 via the rope 9.
This device is prevented from being washed away by the current W by fixing the part and the lower end of the lower frame member 2B.

The position where the rope 9 is connected may be replaced with the hinge 3 at any position on the upper frame member 2A, and may be connected at any position on the lower frame member 2B instead of the lower end of the lower frame member 2B.

In addition, in FIG. 3, the frame member 2 of this device
A flexible curtain material 7 is suspended from the lower end of B via a hinge 6, but in places where the surface of the seabed B is not extremely uneven, the upper frame member 2A and the lower frame member 2
The curtain material 4 may be stretched over B, but the flexible curtain material 7 may not be provided.

[Effect of idea]

According to the pollution diffusion prevention device of the present invention described above, the lower part of the framework member for pollution diffusion prevention on which the curtain material is stretched can be expanded from the upper part, and the curtain material can be damaged by grasping it with a grab bucket or the like. The effect is that there is nothing to do.

In addition, the lower part of the above-mentioned frame member is provided to be bendable via a hinge, and the hinge part and lower end can be adjusted to the unevenness of the seabed surface by a winch via a rope. It also adheres closely to other surfaces and is highly effective in preventing pollution from spreading.

Another advantage is that even in places where there are currents, it is possible to take measures to avoid being swept away by the currents.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of a pollution diffusion prevention device according to an embodiment of the present invention, Fig. 2 is an enlarged plan view of the main parts of the device in Fig. 1, and Fig. 3 is a side taken along the line A-A in Fig. 2. FIG. 1...Float, 2A...Upper frame member, 2
B... lower frame member, 3... hinge, 4... curtain material, 6... hinge, 9... rope, 11... winch, W, L... water surface.

Claims (1)

[Scope of utility model registration request] An upper frame member and a lower frame member each having a curtain material stretched through a hinge are installed below the float floating on the water surface surrounding a predetermined area, and the lower frame member is A pollution diffusion prevention device in which the degree of refraction can be adjusted using a rope, and a winch on a work boat and a frame member or hinge are connected by a rope.