JPH07155079A - Method for preventing shellfishes from sticking - Google Patents

Abstract

PURPOSE:To provide a method for simply and surely preventing shellfishes from sticking to a support standing in the sea. CONSTITUTION:This method for preventing shellfishes such as Balanus granulatus Hiro from sticking to the whole length of a support 1 is to install the first moving unit 2 and the third moving unit 3 connected with a connecting unit 4 in the support 1 standing in the sea so as to enable the free vertical movement, set the distance between both the moving units 2 and 3 at a depth nearly equal to that of the sea at low tide and rub the surface of the support l or apply the vibration thereto with both the moving units 2 and 3 following up to the vertical movement due to the ebb and flow of the sea surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing adhesion of shellfish such as barnacles to props standing in the sea for seaweed cultivation and the like.

[0002]

2. Description of the Related Art Conventionally, means for preventing barnacles or the like from adhering to struts that are erected in the sea for seaweed cultivation and the like is to apply toxic paint to the struts surface or The barnacles and the like adhering to the were cut off.

[0003]

However, the former application of toxic paint is not preferable in the marine environment, and the paint peels off over time, which requires repainting, which is troublesome. . Further, the latter cut-off method has the disadvantage that the work is complicated and the workability is poor, and improvements thereof have been demanded.

Therefore, an object of the present invention is to provide a method for preventing the adhesion of shellfish which has no problem in the marine environment and can automatically prevent the adhesion of barnacles and the like without requiring complicated work. .

[0005]

In order to solve the above problems, the present invention relates to a first moving body which is connected to pillars standing upright in the sea at an interval substantially equal to the depth of the sea at low tide. The second moving body is mounted so as to be vertically movable, and the first moving body and the second moving body are floated along the columns by the vertical movement of the sea surface.

[0006]

According to the present invention, the pillars erected in the sea,
When the first moving body and the second moving body are attached, both moving bodies that follow and float due to vertical movement of the sea surface move up and down along the support pillar, and this movement causes the inner surfaces of both moving bodies to contact the surface of the support pillar. Since they collide with each other and collide with each other, they constantly rub or vibrate the surface of the column, so that the adhesion of shellfish such as barnacles to the surface of the column is prevented.

[0007]

The structure of the present invention will be described below with reference to the accompanying drawings.

As shown in the figure, the pillar 1 standing upright in the sea is
It is made of fiber reinforced plastic, bamboo, metal or the like, and usually has an outer diameter of about 25 to 100 mm and a length of about 3 to 13 m.

The first moving body 2 and the second moving body 3 which are mounted on the column 1 so as to be vertically movable are formed in a donut-like appearance whose inner diameter is several mm to several cm larger than the outer diameter of the column 1. The two moving bodies 2 and 3 are connected by the connecting body 4 so as to be positioned above and below at an interval substantially equal to the depth of the sea at the time of low tide of the sea where the pillar 1 is erected.

The first moving body 2 and the second moving body 3 are made of plastic, wood or other molded body having a smaller specific gravity than seawater, and the connecting body 4 is made of fiber reinforced plastic, metal or the like. It is made of a material having a larger specific gravity than 3.

FIG. 1A shows a state in which a column 1 is erected in the sea, and the first moving body 2 and the second moving body 3 attached to the column 1 are at high tide, and the connecting body 4 and the lower subordinate body are shown. The two moving bodies 3 are in the sea, and the upper first moving body 2 is floating above the sea surface.

FIG. 1B shows the state at low tide,
The first moving body 2 and the second moving body 3 will float following the vertical movement of the sea surface. Therefore, due to movement of the sea surface from low tide to high tide or from high tide to low tide,
The moving body 2 and the second moving body 3 float up and down along the support column 1. By this floating, the two moving bodies 2 and 3 rub the surface of the support column 1 and give vibration to the support column 1. It is possible to prevent shellfish such as barnacles from adhering to the surface of.

At low tide shown in FIG. 1 (B),
Since the second moving body 3 is located at the lower end of the support column 1, the movement of the sea surface from the low tide to the high tide causes the second moving body 3 to move.
Will rub or vibrate the surface of the post 1 below the sea level, and prevent shellfish such as barnacles from adhering to the area below the sea level.

[0014]

[Example] In the sea where the water depth of Ariake Bay is 8.5 m at high tide and 2.5 m at low tide, a fiber reinforced plastic pipe with an outer diameter of 51 mm (11 m in length) was built, and an inner diameter With a diameter of 135 mm, an outer diameter of 150 mm, and a height of 13 mm, and two plastic dough-shaped moving bodies are connected with a fiber-reinforced plastic rod having a thickness of 3 mm, and the length between the moving bodies is 2 m. It was attached to a reinforced plastic pipe and the state of adhesion of shellfish such as barnacles was investigated over time. The results are shown in Table 1.

(Comparative Example) In the above examples, the state of adhesion of shellfish such as barnacles was investigated without mounting the moving body.

Reference Example In the above example, only one moving body was attached and the adhesion of shellfish such as barnacles was investigated.

[0017]

[Table 1]

[0018]

As described above, according to the present invention, the first moving body and the second moving body, which are connected by the connecting body, are mounted on the pillars standing upright in the sea, and both moving bodies follow the vertical movement of the sea surface. Since it was moved up and down along the support pillar, it is possible to rub or vibrate the entire surface of the support pillar with both moving bodies by utilizing the vertical movement at high tide and low tide of the sea surface, which allows the support It is possible to reliably prevent the adhesion of shellfish such as barnacles on the surface of.

Further, since it is only necessary to mount the first moving body and the second moving body on the supporting column, there is no problem in the marine environment, and once mounted, there is an adhesion preventing effect for a long period of time, which is troublesome. It is also economically advantageous.

Further, when only one moving body is attached to the column, if the column is greatly shaken to the left or right due to the flow of wind or tide, the moving body is rotated and jumps out from the column. It is necessary to take a preventive measure by mounting a preventive material larger than the inner diameter of the moving body, but if two moving bodies are used and they are connected by a connecting body as in the present invention, popping out from the column will occur. There is no need to install a preventive material.

[Brief description of drawings]

FIG. 1A is a front view showing a state at high tide showing an adhesion preventing method of the present invention, and FIG. 1B is a front view showing the same state at low tide.

FIG. 2 is a perspective view showing a moving body.

[Explanation of symbols]

 1 Support 2 First moving body 3 Second moving body 4 Connected body

Claims (1)

[Claims] 1. A first movable body and a second movable body, which are connected to each other at an interval substantially equal to the depth of the sea at the time of low tide, are vertically movably mounted on columns that are erected in the sea, and are moved by vertical movement of the sea surface. A method for preventing adhesion of shellfish, in which the first moving body and the second moving body are floated along columns.