JPH0342103Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) The present invention is a pollution prevention fence, especially for seas, rivers, etc.
This relates to a pollution prevention fence that is designed to contain the pollution generated by dredging of underwater ground within the minimum dredged area during marine and river civil engineering works such as lake reclamation, seawalls, breakwaters, and port structures.

(Prior art) Oil fences have been known as devices used to prevent oil from spreading, but oil fences are simply endless rod-shaped floats that float on the sea surface. Although it is useful for preventing runoff, it has the drawback that it cannot be used at all to prevent pollution that occurs and rises in the underwater ground.

(Purpose of the invention) The object of the invention relates to a pollution prevention fence that prevents pollution generated in underwater ground from flowing out and confines the pollution within a minimum dredged area.

(Structure of the invention) The pollution prevention fence of the invention includes an endless upper float that floats on the water surface, and a size that is positioned outside the upper float so as to surround it.
a lower ballast having an endless shape that sinks below the water surface; a flexible, watertight endless sheet connecting the upper float and the lower ballast; and a mechanism for lifting the lower ballast toward the upper float. , a mechanism for connecting the upper float dredgers via a buffer.

(Example of idea) Embodiments of the present invention will be described below with reference to the drawings.

In the present invention, as shown in Fig. 1, there is an endless upper float 1 that floats on the water surface, and an endless float of size and shape located outside the upper float 1 that sinks below the water surface. a lower ballast 2; a flexible material made of vinyl or the like connecting the lower ballast 2 and the upper float 1;
A watertight endless sheet 3, a plurality of winches 4 provided on the upper float 1, one end of which is connected to the lower ballast 2, extending along the outer surface of the sheet 3, and the other end of which is connected to the lower ballast 2. A plurality of wire ropes 5 wound around a winch 4, a plurality of chains 6 suspended alternately from the upper float 1 along the inner and outer surfaces of the sheet 3 as shown in FIG. 2, and a plurality of chains 6 as shown in FIG. An arc-shaped mounting bracket 10 provided on the upper float 1 and having a plurality of mounting positions; an arm 11 whose base portion can be attached to the mounting bracket 10 with a variable mounting angle with a bolt or the like; A fence is constituted by a tire 12 rotatably supported at the tip of the fence.

The upper float 1 of the present invention has a rectangular endless shape, for example, and is constructed by connecting a plurality of hollow straight pipe parts 7 and bent pipe parts 8 with a rubber sleeve 9, each of which is a hollow straight pipe with both ends sealed. The winch 4 is attached to the part shown in FIG.

The fence is connected to the dredger by a connecting mechanism (not shown).

(Effects of the invention) Since the pollution prevention fence of the invention has the above-mentioned configuration, the pollution generated during dredging of underwater ground can be contained within the minimum dredging area, and the raising and lowering of the sheet 3 is easy. This is possible by raising and lowering the ballast 2 using a winch 4 on the float 1 via a rope 5, as shown in FIG. In this way, the water level becomes very shallow, which is convenient for towing, and the lower ballast can be pulled up outside the upper float, so the lower ballast is not directly under the upper float as in the conventional case. This has the advantage that the seat can be replaced extremely easily compared to a seat that can be pulled up directly. Furthermore, since the chain 6 is hung from the float 1 alternately on the inside and outside of the seat 3 to hold down the seat 3, the sway of the seat 3 can be prevented.

The float 1 can be separated into a curved pipe section 8, a straight pipe section 7, and a rubber sleeve 9, making it easy to transport on land.

Further, each of the curved pipe portions 8 and the straight pipe portions 7 of the float 1 is an independent float, so that even if a portion of the float is perforated and flooded, the entire float will not sink. There is also the advantage that the working range can be changed freely by increasing or decreasing the number of straight pipe sections 7. Further, the fencing of the present invention is towed into the work area by the dredger 13 and moored to the dredger 13 during the work, so the dredging work is easy and a wide area can be treated quickly.
In this case, the vertical movement of the float 1 and the dredger 13 due to waves is buffered, and at the same time the distance between them remains constant regardless of the degree of roundness of the hull of the dredger 13, the height of the dredging water, the type of ship, etc. It is desirable that the arm 11 provided on the fence of the present invention
The above objective can be achieved by adjusting the mounting angle.

[Brief explanation of drawings]

Figure 1 is a perspective view of the pollution prevention fence of the present invention, Figure 2 is an explanatory diagram of its chain arrangement, Figure 3 is an explanatory diagram of its operating state, and Figure 4 is a perspective view of the fender mechanism of the present invention. be. 1... Upper float, 2... Lower ballast, 3
... Sheet, 4 ... Winch, 5 ... Wire rope, 6 ... Chain, 7 ... Straight pipe section, 8 ... Bent pipe section, 9 ... Rubber sleeve, 10 ... Mounting bracket,
11... Arm, 12... Tire, 13... Dredger.

Claims (1)

[Claims for Utility Model Registration] (1) An endless upper float that floats on the water surface, and an endless lower ballast of size and shape that is located outside the upper float so as to surround it and sinks below the water surface. a flexible, watertight endless sheet connecting the upper float and the lower ballast, a mechanism for hoisting the lower ballast toward the upper float, and a buffer between the upper float dredger and the upper float dredger. A pollution prevention fence characterized by comprising a connecting mechanism. (2) Claim 1 of the utility model registration in which the lifting mechanism is constituted by a winch provided on the upper float and a rope having one end attached to the winch and the other end connected to the lower ballast.
Pollution prevention fence as described in section. (3) The pollution prevention fence according to claim 1, in which the buffer body comprises an arm provided on the upper float so that its mounting angle can be changed, and a tire rotatably supported at the tip of the arm. .