JPH0779660A - Method for maintaining float of floating raft - Google Patents

Abstract

PURPOSE:To enable to simplify a work for removing organisms adhered to floats in a floating raft such as a raft for culturing fishes or shellfish, etc. CONSTITUTION:The outside surface 20 of each float 10 attached to the frame 1 of a floating raft is covered with a cover member 13, and the mutually faced two sides 13A, 13C of the cover member 13 are tightened to close and cover both the end surfaces 20A, 20A of each float 10 with both the sides 13A, 13C of the cover member. The other mutually faced two sides 13B, 13D of the cover member 13 are openably closed with other tightening member 16 on the upper part 10a of the float 10. Thus, the cover member 13 is detachably attached to the float 10 so that it is inhibited that sea water is flown into or out from the inside of the cover member 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a maintenance method for an offshore raft float used for aquaculture of seafood and pearls.

[0002]

2. Description of the Related Art FIG. 5 and FIG. 6 show an example of a conventional offshore raft (raft for seafood culture). The offshore raft Y of this conventional example is an inner frame member 101, 101 ... Frame material 102,1
02 .. and the inner frame members 104, 104 .. .., floats 110, 110, which are formed by covering a cylindrical float material 111 made of expanded polystyrene with a bottomed bag-like cover 113.
.. are firmly bound and attached by ropes 120, 120. And this offshore raft Y is
Inner frame material 101, 101 ・ while floating on the sea offshore
The aquaculture net 125 is attached to and the various seafood are aquacultured in the aquaculture net 125.

[0003]

By the way, in this type of offshore raft Y, the inner and outer frame members 101, 101, ..., 102,
102 ... and submerged portions of the floats 110, 110 ... Attached to the inner frame members 104, 104 ...
(Part immersed in seawater below the waterline S) 110a, 1
10a ... a large amount of attached organisms (eg barnacles, oysters,
Mussels, crabs, etc.) adhere to the organisms (barnacles, oysters, mussels, etc.), and the aquaculture net 125 is broken, or the float material 111 of each float 110 is eroded by crabs, etc. There was a problem that the buoyancy decreased. Therefore, in this type of offshore raft Y, the attached organisms attached to the floats 110, 110 ... Are removed periodically (for example, once or twice each year),
At that time, it is customary to perform maintenance work such that the covers 113 of the floats 110, 110 ... Are replaced. At that time, in the conventional offshore raft Y, each float 11
0 is rope 120,120 by each frame material (101,10
(2,104 ...) is tightly bound and attached, so it is not easy to remove each float 110 from each frame material on the sea and remove the attached organisms attached to the float 110. Then, this offshore raft Y is moved from offshore to land by ship, and is landed by a crane, and the attached organisms attached to each float 110 are removed on land, and each float 110 is unwound with ropes 120 and 120. The maintenance work was performed by removing each frame member (101, 102, 104 ...) And replacing the bag-shaped cover member 113 with another new bag-shaped cover member 113. Therefore, this type of conventional offshore raft Y
However, there has been a problem that maintenance of each float 110 requires a lot of time and labor and the cost thereof is high.

In view of the above-mentioned problems in maintenance of the conventional offshore raft float, the present invention makes it possible to easily control the organisms attached to the float and replace the float cover at low cost. The purpose was to propose a maintenance method for the float of the offshore raft.

[0005]

The maintenance method for the float of the offshore raft according to the present invention has been made to solve the above problems, and as shown in FIGS. 1 to 4, the frame body of the offshore raft is exemplified. The outer side surface 20 of each float 10 attached to the cover member 1 is covered with a cover member 13, and the two opposite side portions 13A and 13C of the cover member 13 are squeezed by tightening members 15 and 15 to cover the cover member. 2 sides 1
Both end surfaces 20A, 2 of each float 10 by 3A, 13C
0A is closed and covered, while the other two opposite side portions 13B and 13D of the cover member 13 are openably and closably closed on the upper portion 10a of the float 10 by another tightening member 16. The cover member 13 is detachably attached to the inside of the cover member 13 so that the inflow and outflow of seawater into and from the inside of the cover member 13 is restricted.

[0006]

As described above, in this type of offshore raft Y,
Although it is necessary to perform maintenance work on the float regularly, in the present invention, the cover member 13 facing the float 2
The side portions 13B and 13D are float 1 by the tightening member 16.
Since the cover member 13 is detachably attached to the float 10 by opening and closing on the upper part 10a of 0, the float is protected while the offshore raft Y is used for a certain period. Mussel on the outer surface of the cover member 13,
When a large amount of attached organisms F such as oysters and barnacles are attached, the tightening member 1 is left floating on the offshore raft Y.
6 is removed, the old cover member 13 is removed, and when the old cover member 13 is reused, the same cover member 13 is used.
After removing the attached organisms F such as mussels and barnacles attached to the cover 10, the cover member 13 is reattached to the float 10,
Alternatively, when a new cover member 13 is used instead of the old cover member 13, the new cover member 13 is attached to the float 10. When the cover member 13 is attached to the float 10, one side part of the cover member 13
(13B or 13D) is hung from one side of the float 10 into the sea to pass under the float 10, and then one side (13B or 13D) of the cover member 13 is floated.
The other side of the float 10 is pulled up, and the float 10 is encapsulated from below by the cover member 13. Next, the drawing operation of the second side portions 13A and 13C of the cover member 13 and the cover member 13 are performed.
The other two side portions 13B and 13D are closed with each other (either of these two operations may be preceded or followed). When the two side portions 13A and 13C of the cover member 13 are squeezed by the tightening members 15 and 15, both end faces 20A and 20A of the float 10 are closed and covered by the cover member 2 side portions 13A and 13C, so that the float 10 and the cover member 13 are covered. The free flow of seawater into and out of the space is restricted. In this way, if the inflow and outflow of seawater between the float 10 and the cover member 13 is restricted, an oxygen-deficient state is created between the two, and the growth of organisms such as mussels and barnacles on the outer surface 20 of the float 10 is prevented. It

If the attached organisms F such as mussels and barnacles attached to the old cover member 13 are left as they are and a new cover member 13 is mounted thereon, the old cover member 13 and the new cover member 13 are separated from each other. The inflow and outflow of seawater between the covers is restricted, and the adhering organisms F such as mussels and barnacles between the covers become oxygen-deficient and eventually die, so various adhering organisms F attached to the old cover member 13
If there is not so much, the old cover member 13 may be left with the attached organisms F attached, and the new cover member 13 may be mounted thereon. According to this method, the maintenance method of the present invention can be applied to the float 110 formed by covering the float material 111 with the conventional bottomed bag-shaped cover member 113 (see FIG. 6).

[0008]

Therefore, according to the maintenance method for the float of the offshore raft of the present invention, the attached organisms (barnacles, oysters, mussels, crabs, etc.) F are attached while the raft Y is left floating on the ocean. Replace the old cover member 13 with the new cover member 13
(Or the old cover member 13 after removing the attached organism F)
Since maintenance work can be performed on the float 10 by exchanging with, the offshore raft will be landed by a crane to remove attached organisms and float on land as shown in FIGS. 5 and 6.
As compared with the conventional offshore raft maintenance method in which the (110, 110 ...) Desorption work is performed, the maintenance work for the float 10 can be performed easily and at low cost.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS. 1 to 4. The maintenance method for a float on an offshore raft according to this embodiment is to cultivate seafood such as chinu and yellowtail. It is applied to the offshore raft (Raft for seafood farming) X.

The raft X for cultivating fish and shellfish is used to cultivate sea bream, such as Chinese chives and yellowtail, on a frame 1 which is floated by a plurality of floats (24 in this embodiment). It is constructed by attaching a net 25 for aquaculture.

As shown in FIG. 1, the frame body 1 includes an inner frame member 2,
The outer frame members 3 and 3 and the inner frame members 4 and 4 are framed in a substantially T-shape.

Inner frame member 2, outer frame member 3 and inner frame member 4
Has a diameter of about 10 to 15 cm and a length of about 10 to 15 m.
It is made of vinyl chloride pipe (or FRP), iron pipe, bamboo and wood. The inner frame members 2, 2 ..., The outer frame members 3, 3 ..., And the inner frame members 4, 4 ... Are appropriately spaced so that floats 10, 10 ... They are assembled in parallel with each other with a space (for example, a distance of about 50 to 55 cm). Four floats 10, 10, ... Are mounted between each inner frame member 2 and each outer frame member 3 and between each inner frame member 4,4. or,
The inner frame material 2, 2 ...
Can be installed. In addition, in FIG.
Reference numeral 30 is a fixing member (clamp metal fitting) for fixing the inner frame members 2, 2 ..., The outer frame members 3, 3 ..., And the inner frame members 4, 4.

As shown in FIG. 2, the float 10 is formed of a foam material 11 made of expanded polystyrene and a covering material 12 for covering the entire float material 11 as in the conventional case. The float 10 is attached by ropes 33, 33 between the inner frame members 2, 2 ... of the frame 1 and the outer frame members 3, 3 ... and between the middle frame members 4, 4 ,. Cage, frame 1
The outer surface 20 is covered with a cover member 13 which will be described later. The float material 11 has a diameter of about 60 cm and a length of about 100 to 110.
It is formed into a cylindrical body of about cm. The covering material 12 is formed of a laminated bag made of polypropylene or the like. Each float 10, 10, ... Has a buoyancy force that does not sink even when an operator puts it on the frame body 1 when it is mounted on the frame body 1.

As shown in FIG. 3, the cover member 13 is made of a nylon sheet or the like and has a square shape or a rectangular shape (for example, 150c).
m × 180 cm), and the float 10
It is possible to cover substantially the entire outer surface 20 (up to a portion above the waterline S). The cover member 13
Of the two sides (the first side 13A and the third side 1
3C), rope insertion holes 18, 18 for inserting the tightening members (ropes) 15, 15 are formed, respectively.
The first side portion 13A and the third side portion 13C have ropes 15 and 15 inserted in the rope insertion holes 18 and 18 so that they can be inserted and removed freely, and are narrowed by the ropes 15 and 15, respectively. ing. Further, the other two side portions (the second side portion 13B and the fourth side portion 13D) of the cover member 13 have insertion holes (eyelet holes) 19 for inserting other tightening members (ropes) 16 therein. , 19 ... Are formed respectively. The cover member 13 includes a side portion with the rope 15 (first side portion 1
3A, the third side portion 13C) covers and covers both end surfaces 20A, 20A of the outer side surface 20 of the float 10, while the side portion with the eyelet hole 19 (the second side portion 13B, the fourth side portion 1).
3D) is an upper part 1 of the side peripheral surface 20B of the float outer surface 20.
It is designed to cover up to 0a. As shown in FIGS. 2 and 4, the cover member 13 has the outer surface 20 of the float 10 in a state of being covered from the lower side portion 10b thereof.
The side portions 13A and the third side portion 13C are narrowed down by the ropes 15 and 15, and both end portions 15a, 15a, 15a, 1 of each rope are narrowed down.
When the frame 5a is fixed to the frame 1 (the inner frame member 2, the outer frame member 3, and the inner frame members 4, 4), the outer surface 2 of the float 10 is fixed.
Both end surfaces 20A, 20A of 0 can be covered substantially from the lower end to a portion above the height of the water line S (for example, about 2/3 portion from the lower end of both end surfaces 20A, 20A). Further, as shown in FIG. 2, the other second side portion 13B and the fourth side portion 13D of the cover member 13 are provided outside the float while inserting the rope 16 into the rope insertion holes 19, 19 ... When the upper side portion 10a of the side peripheral surface 20B of the side surface 20 is closed, substantially the entire peripheral side surface 20B of the float outer side surface 20 can be covered.
As a result, the cover member 13 has its inside (between the cover member 13 and the outer side surface 20 of the float 10) even if the floats 10, 10 ... Attached to the frame 1 are floated on the sea. Since it is possible to reduce the inflow and outflow of seawater into the inside of 14 as much as possible, the submerged portion of the outer side surface 20 of the float 10 (the lower side portion below the height of the waterline S) 10b.
Attached to seawater (barnacles, oysters, mussels, crabs, etc.)
It is possible to prevent F from adhering or growing. Further, the cover member 13 releases the upper portion 10a of the float 10 by unraveling the rope 16 between the second side portion 13B and the fourth side portion 13D, and the first side portion 13A,
When the ropes 15 and 15 of the third side portion 13C are unraveled from the frame body 1 (inner frame member 2 and outer frame member 3, middle frame members 4 and 4),
The cover member 13 can be removed from the frame 1 and replaced with another new cover member 13.

Although the above description is for the case where the old cover member 13 is removed and replaced with a new cover member 13, the method of the present invention is to remove the old cover member 13 as shown in FIG. It is also possible to carry out without (when the attached organisms F are small), and to cover with a new cover member 13 'from above.

The aquaculture net 25 is made of a synthetic resin thread and is formed in the shape of a bottomed bag having a bottom net 25a and a side net 25b. It is now possible to farm.

The initial assembly of the offshore raft used in this embodiment is carried out as follows using the above-mentioned members.
That is, first, as shown in FIGS. 1 and 2, on the land, the inner frame members 2, 2 ... And the outer frame members 3, 3 ...
After the frame is framed in a substantially T-shaped frame body 1, the inner frame members 2, 2 ... of the frame body 1 and the outer frame members 3, 3 ... The floats 10, 10 ... Are fixed between the ropes 4, 4 ... by ropes 33, 33. continue,
With the cover member 13 covering the entire lower portion 10b of the outer side surface 20 of the float 10, as shown in FIG. 2, the rope for squeezing the end portion of the first side portion 13A of the cover member 13 After the first side portion 13A is narrowed down by 15 and one end surface 20A of the float outer side surface 20 is substantially closed and covered, both ends 15a, 15a of the rope 15 are framed (inner frame member 2 and outer frame member 3 or Secure to the inner frame material 4, 4). Further, one end 16a of the upper closing rope 16 of the cover member 13 is attached to the one end side rope insertion hole 19 (or the inner frame member 2, outer frame member 3 or middle frame member 4), and While the other end portion 16b is sequentially inserted in the other rope insertion holes 19, 19 ... In a zigzag shape, the second side portion 13B and the fourth side portion 13D of the cover member 13 are closed to each other and the upper side of the float 10 is closed. Frame 1 up to part 10a
Cover with. Furthermore, subsequently, the other end portion 15a, 15a of the rope 15 in a state where the third side portion 13C of the cover member 13 is narrowed down by the other end portion drawing rope 15 and the other end surface 20A of the float outer surface 20 is substantially closed and covered. To the frame 1. At this time, as shown in FIG. 2 or 4, the cover member 13 covers the float 10 from its lower side to a portion 10a above the height of the water line S. Other cover members 13, 13 ...
. Is attached to each of the other floats 10, 10 ... to form a raft X for seafood culture. And this raft for seafood culture X
After being towed to the sea offshore by a boat and floating, the aquaculture net 25 is attached to the inner frame members 2, 2 ... of the frame body 1 and fish and shellfish such as chinen and yellowtail are attached to the aquaculture net 25. Aquaculture. In this case, in the raft X for seafood culture, each cover member 13,
The outer side surfaces 20, 20 ... Of the respective floats 10, 10 ... are covered by 13 ... to a position above the height of the water line S, and both end surfaces 2 of the float outer side surface 20 are covered.
Since 0A and 20A are covered and covered with the first side portion 13A and the third side portion 13C of the cover member 13, the inside of each cover member 13, 13 ... (For each cover member 13 and each float 10) Between the outer side surface 20) 14, 14 ... Since the seawater can be prevented from flowing in and out as much as possible, the lower side of the outer side surface 20, 20, ... Of each float 10, 10 ,. Department
It is possible to prevent the adherent organisms (barnacles, oysters, mussels, crabs, etc.) F in seawater from adhering to or growing on (below the height of the waterline S) 10b, 10b.

Each float 10, using the raft X for seafood culture for a long period of time (for example, about half a year to about one year).
10 ... cover member 13, 13 ... submerged portion 13
When a large amount of attached organism F attaches to a, 13a ...
While the operator rests on the raft X (frame 1 and each float 10) on the sea, the old cover member 13 is unwound by the end-drawing ropes 15 and 15 and the upper closing rope 16 to open the frame 1 After removing from the old cover member 13, a new cover member 13 is attached to each float 10, 10, ... Of the frame 1 to replace it, or the old cover member 13 is entirely replaced with the old cover member 13. A new cover member 13 'is attached so as to cover the respective parts (state of FIG. 4). At this time, when each old cover member 13 to which the attached organisms F are attached is covered with another new cover member 13 ', each new cover member 13' moves the old cover members 13 together with the attached organisms F above the height of the water line S. It becomes possible to cover up to the position part. Also in this case, both end portions 20A, 20A of the float outer side surface 20 have the cover member 1
3'is closed and covered by the first and third side portions 13A and 13C. As a result, the new cover member 13 'prevents damage to the aquaculture net 25 by the attached organisms F, while the inside of the new cover member 13' (between the new cover member 13 'and the old cover member 13) 14 Since there is no replacement of seawater in ′ (becomes an oxygen-deficient state), the attached organisms F attached to each old cover member 13 are killed. As a result, it is possible to prevent the attached organisms F of the old cover members 13 from eroding the floats 10 (the float material 11 and the covering material 12).

As described above, in the maintenance method for the float on the offshore raft, the operator replaces or recoats the cover member 13 with the float on the raft X on the offshore. Since the protective coating can be applied, there is no need for large-scale work (landing of the raft or detachment of the float from the frame) as in the case of the conventional raft (see FIGS. 5 and 6). Maintenance work for the float on the offshore raft can be performed with low labor and low cost.

In the maintenance method for the float on the offshore raft described above, ropes are used as the tightening members 15 and 16, but in other embodiments, other tightening members such as fasteners are used instead of the ropes. You can also Further, the shape of the cover member 13 is not limited to a square or a rectangle, but a polygonal shape,
Circular shapes can also be used. Further, although the above-mentioned embodiment was intended for the float of the raft for seafood cultivation, the present invention is not limited to this. For example, a simple raft for mooring a fishing boat, a simple raft for a fishing pond, or a port facility. It can also be applied to floats used for jetty and the like.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a raft for aquaculture for which a maintenance method for a float of an offshore raft of the present invention is applied.

FIG. 2 is a perspective view of an essential part of the raft for aquaculture of FIG.

3 is an overall perspective view of a cover member used for coating the float on the offshore raft of FIG.

FIG. 4 is an explanatory view of a working state of a float cover coating method in the offshore raft of FIG.

FIG. 5 is an overall perspective view of a conventional offshore raft.

6 is a perspective view of a main part of the offshore raft shown in FIG.

[Explanation of symbols]

1 is a frame, 10 is a float, 10a is an upper part of the float,
Reference numeral 13 is a cover member, 13A, 13B, 13C and 13D are cover member side portions, 15 and 16 are tightening members, 20 is a float outer surface, and 20A and 20A are float end surfaces.

Claims (1)

[Claims] 1. An outer surface (20) of each float (10) attached to a frame (1) of an offshore raft is covered with a cover member (13), and the cover members (13) face each other. The two side portions (13A, 13C) are squeezed by the tightening members (15, 15), and the both end surfaces (20A, 20A) of each float (10) are closed and covered by the cover member 2 side portions (13A, 13C). On the other hand, the other two opposite side portions (13B, 13D) of the cover member (13) are openably and closably closed on the upper portion (10a) of the float (10) by another tightening member (16). By fitting the cover member (13) to the float (10) so as to be detachable and to limit the inflow and outflow of seawater to the inside of the cover member (13), the offshore raft. Maintenance method for floats.