JPH0241303B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention uses a chain to scrape the surfaces of the seafloor, underwater rocks, reefs, etc. to remove algae, sludge, shellfish excrement, and other seaweeds such as kelp that adhere to these surfaces. This invention relates to the floating body of a scraping device used to scrape off spores and substances that inhibit the implantation of young abalone shells.

Conventionally, as a floating body of a scraping device used for the above-mentioned purpose, a steel band Y is attached to a log X and a chain Z is attached to this steel band Y, as shown in Fig. Hollow glass fiber-reinforced plastic products were mainly used in the past, but the former absorb seawater during use and gradually lose their buoyancy, sinking below the sea surface and being moved by ocean currents, wind, waves, etc. It has disadvantages such as the fact that it becomes difficult to clean the seabed, and its purification effect on the seabed is significantly reduced.The material is also a natural product, so it has poor durability.The latter is simply a hard hollow cylinder. Because of this, they not only have low impact resistance against contact with fishing boats and driftwood, but also cannot withstand the harsh waves of the open ocean for long periods of time, causing them to break and be washed away within one to two years.

As a result of intensive research to eliminate the drawbacks of the floating body of the conventional scrubbing device, the present inventor succeeded in developing a floating body of the scrubbing device that has excellent durability and impact resistance, and has completed the present invention. be.

That is, the present invention provides a core made of a polyurethane foam material whose outer surface is partially reinforced with reinforcing ribs made of a hard material on the outer peripheral surface of a pipe-shaped shaft made of a hard material and having internal threads on both ends. The entire outer surface of the core material and reinforcing rib material is coated and integrated with a glass fiber reinforced plastic material, and eye bolts to which a rubbing chain is attached are threaded into the female threads at both ends of the shaft. A floating body of the scrubbing device is provided.

Hereinafter, the floating body of the scrubbing device according to the present invention will be explained in detail with reference to the drawings.

Fig. 1 is a front view of one embodiment of the floating body of the abrasion device according to the present invention, Fig. 2 is an enlarged sectional view of section A in Fig. 1, and Fig. 3 is used for the floating body of the abrasion device according to the present invention. FIG. 4 is a perspective view of the reinforcing rib material, and FIG. 4 is a front view showing the state in which the floating body of the scrubbing device according to the present invention is used.

In the drawing, 1 has a triangular cross-sectional shape, a quadrangular shape,
The floating body of the scraping device has an arbitrary shape such as a polygon such as a hexagon or an octagon, or a circle or an ellipse.
Reference numeral 2 denotes a pipe-shaped shaft made of a hard material with corrosion resistance and high strength such as stainless steel or ultra-high molecular weight polyethylene, and has female threads 2a screwed on both ends. Accordingly, a protrusion 2b for preventing the core material 3 from slipping, which will be described later, is provided at a predetermined portion of the outer peripheral surface, such as near the end or the middle portion. 3 is coated on the outer circumferential surface of the shaft 2 and is integrated into the shaft 2. For example, the specific gravity is
The core material is made of polyurethane foam material having rigid or semi-rigid closed cells of 0.02 to 0.30.
4 is a material with high corrosion resistance and high corrosion resistance, such as stainless steel or hard plastic material, which is embedded in the core material 3 made of polyurethane foam material and partially reinforces the outer surface of the core material 3 and the inner surface of the glass fiber reinforced plastic material 5, which will be described later. 5 is a glass fiber reinforced plastic material which is integrated with the core material 3 and the reinforcing rib material 4 by covering the entire outer surface of the core material 3 and the reinforcing rib material 4. It is. Reference numeral 6 denotes an eye bolt screwed onto female threads 2a screwed on both ends of the shaft 2, and the eye bolt 6 scrapes the surfaces of the seabed, underwater rocks, reefs, etc. and adheres to these four surfaces. A scraping chain 7 is attached for scraping off algae, sludge, shellfish excrement, spores of seaweed such as kelp, and substances that inhibit the implantation of young abalone shellfish. Reference numeral 8 denotes an anchor attached to the scraping chain 7, which prevents the scraping device from flowing out.

In order to use the floating body of the scrubbing device according to the present invention having the structure described above, first attach the eye bolts 6 at both ends of the floating body 1 of the scrubbing device to appropriate lengths selected according to the condition of the sea depth to be scrubbed. A scraping chain 7 is attached to the shaft, and an anchor 8 is attached to one side of the scraping chain 7 to form a scraping device. When this abrasion device is thrown into the sea, the floating body 1 of the abrasion device rises to the sea surface, the abrasion chain 7 and the anchor 8 sink into the sea, and the anchor 8 is attached to the seabed. 1 from flowing out, and the extra length of the scraping chain 7 lies on the rocks, reefs, etc. on the seabed. When the floating body 1 of the scraping device floats on the sea surface in such a state due to ocean currents, wind, waves, etc., the scraping chain 7 connected to the floating body 1 of the scraping device also moves and touches the seabed or underwater rock. It scrapes off the surfaces of rocks and reefs, etc., and removes things that are attached to these surfaces, such as algae, sludge, and shellfish excrement, that inhibit the settlement of seaweed spores such as kelp, and young abalone shellfish. be.

The floating body of the scraping device according to the present invention having the structure as described in detail above has various advantages as listed below, and its contribution to the field of fishery is very large.

The shaft 2, which is the central material, is made of a hard material and has high rigidity, so that the core material 3, which is made of a polyurethane foam material whose outer surface is partially reinforced with reinforcing rib material, can be easily and accurately coated on its outer peripheral surface. Female thread 2 screwed on both ends
The eye bolt 4 to which the scraping chain 7 can be firmly and reliably attached can be screwed onto the scraping chain 7.
Moreover, the rubbing chain 7 can be replaced very easily due to the presence of the eye bolt 6.

If only the glass fiber reinforced plastic material 5 is used, the glass fiber reinforced plastic material 5 will be easily damaged by the impact caused by contact with floating objects such as fishing boats and driftwood during use, and cannot withstand long-term use. Since the core material 3 made of polyurethane foam exists inside the fiber-reinforced plastic material 5, the core material 3 cushions the impact on the glass fiber-reinforced plastic material 5, making it difficult for the glass fiber-reinforced plastic material 5 to be damaged. Even if the fiber-reinforced plastic material 5 is damaged, the core material 3 can prevent seawater from entering the inside of the floating body 1 of the scrubbing device, so it can be used semi-permanently.

Since the glass fiber reinforced plastic material 5 covering the entire outer surface of the core material 3 and the reinforcing rib material 4 is partially reinforced on the inside with the reinforcing rib material 4 made of a hard material, the glass fiber reinforced plastic material 5 Even if the floating body 1 of the scrubbing device is subjected to external forces such as impact force or wave force due to collision with drifting objects, deformation such as twisting or distortion of the floating body 1 of the scrubbing device can be prevented, and the durability of the floating body 1 of the scrubbing device is increased. can be improved.

By using a semi-hard or hard polyurethane foam material with a specific gravity of about 0.02 to 0.30 and having closed cells as the polyurethane foam material constituting the core material 3, the glass fiber reinforced plastic material 5 may be damaged or cracked. However, the specific gravity of the floating body 1 of the scrubbing device does not increase due to water absorption, the performance of the floating body 1 of the scrubbing device does not deteriorate, and it can be used semi-permanently.

[Brief explanation of the drawing]

Fig. 1 is a front view of one embodiment of the floating body of the scrubbing device according to the present invention, Fig. 2 is an enlarged cross-sectional view of section A in Fig. 1, and Fig. 3 is used for the floating body of the scrubbing device according to the present invention. FIG. 4 is a front view showing the state in which the floating body of the scrubbing device according to the present invention is used, and FIG. 5 shows the state in which a log is used as the floating body of the conventional scrubbing device. FIG. 1... Floating body of the scraping device, 2... Shaft, 2
a...Female thread, 2b...Protrusion to prevent slippage, 3
... core material, 4 ... reinforcing rib material, 5 ... glass fiber reinforced plastic material, 6 ... eye bolt, 7 ...
...Rubbing chain, 8...Anchor.

Claims (1)

[Scope of Claims] 1. Made of a polyurethane foam material whose outer surface is partially reinforced with a reinforcing rib material made of a hard material on the outer peripheral surface of a pipe-shaped shaft made of a hard material and having female threads installed at both ends. Further, the entire outer surface of the core material and the reinforcing ribs are covered with a glass fiber reinforced plastic material and are integrated, and the female threads at both ends of the shaft are provided with eye bolts to which a rubbing chain is attached. A floating body of a scraping device characterized by being screwed onto the body. 2 The polyurethane foam material constituting the core material coated on the outer peripheral surface of the shaft has a specific gravity of 0.02
The floating body of the scrubbing device according to claim 1, which is made of a hard, closed-cell polyurethane foam material with a diameter of 0.30. 3 The polyurethane foam material constituting the core material coated on the outer peripheral surface of the shaft has a specific gravity of 0.02.
The floating body of the scrubbing device according to claim 1, which is a semi-rigid, closed-cell polyurethane foam material of ~0.30. 4. The floating body of the scrubbing device according to any one of claims 1 to 3, wherein the shaft has a flat outer peripheral surface. 5. The floating body of the scraping device according to any one of claims 1 to 3, wherein the shaft is provided with protrusions for preventing the core material from slipping on its outer peripheral surface.