JP4861046B2 - Fish reef unit and fish reef using the same - Google Patents

Description

  The present invention relates to an artificial fish reef unit using thinned wood and an improvement of a fish reef using the same.

As one of the effective uses of thinned wood that is unsuitable as a construction material, it is being used for artificial reefs. For example, in the following patent document, a fish reef member (panel A) integrally formed by projecting a plurality of thinning materials embedded through the upper and lower surfaces of a concrete panel, and a frame-shaped concrete panel It is a fish reef in which a plurality of thinned timbers are laid and fixed on a shelf and combined with a fish reef member (panel B).
JP 2005-137267 A

However, the fish reef member, which is the fish reef unit described in the above-mentioned patent document, has a relatively small size. For example, thinned wood is cut into a length of 30 to 50 cm in panel A and 200 cm in panel B. A relatively small fish reef can be used effectively by making a small turn, but a large-scale fish reef has to use a large amount of fish reef members, increasing the number of units and requiring enormous costs.
The present invention, on the other hand, has a fish reef unit with a relatively large size with few parts for thinning thinned wood, suitable for relatively medium to large fish reefs by combining units, and installed on the seabed. To obtain a fish reef unit and a fish reef using the same, which will not move or overturn against external forces such as tidal currents, waves, etc. With the goal.

to this end,
In the invention of claim 1, a) an outer frame formed by enclosing an outline in a rectangular shape, and an intermediate frame fixed in a square shape across the front and rear sides of the outer frame intermediate portion And a brace that crosses and extends across the left and right outer surface sides of the outer frame and the intermediate frame, and a front, intermediate, and rear space block are formed by the outer frame and the intermediate frame, and B) A rectangular front and rear concrete part integrally formed with the outer frame in front of and behind the front and rear space blocks, and c) a substantially horizontal space passing through the concrete part. The problem was solved by a reef unit consisting of multiple thinned woods.
In the invention of claim 2, the thinned material is embedded in the upper part of the concrete part, and a plurality of openings are formed in the lower part of the concrete part at substantially horizontal intervals. It is preferable to use a reef unit.
In the invention of claim 3, the fish reef unit according to any one of claims 1 to 2, wherein a hollow portion is previously drilled in the end core of the thinned material embedded in the front and rear concrete portions. It is preferable to do this.
In the invention of claim 4, the fish reef unit according to any one of claims 1 to 3 is disposed in parallel with a distance in the longitudinal direction of the pair, and the front and rear are connected by upper and lower frame connecting materials, The fish reef unit is solved by a fish reef in which the distance between the left and right ends is the same as the front and rear depth of the outer frame and is modularized.
In the invention of claim 5, using the plurality of sets of fish reefs according to claim 4, the upper steps are sequentially rotated 90 degrees with respect to the lower steps, and are placed in a cross-beam shape and fixed to each other. Solved by.

  According to the fish reef unit of the present invention and the fish reef using the same, the thinned timber is configured in a relatively large size, and is suitable for a relatively medium to large fish reef by combining the units, and installed on the seabed The timber is not moved or overturned due to external forces such as tidal currents and waves, and the thinned wood is less likely to float and float. Can be saved.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an example of a fish reef unit according to the present invention, and is a plan view, a side view, and a front view. FIG. 2 is a perspective view of the fish reef unit of FIG. 1, and is an overall view and a front end enlarged view.
FIG. 3 shows an example of a fish reef using the fish reef unit of FIG. 1, and is a plan view, a side view, and a front view.
FIG. 4 is a perspective view of the fish reef of FIG.
In the following, referring to FIG. 2, for example, the fish reef unit will be described with the left end side in the longitudinal direction as front F, the right end side as rear B, the left side viewed from the front F as left L, and the right side as right R. .

An example of the fish reef unit of the present invention will be described with reference numeral 1 with reference to FIGS. Here, what is indicated by a two-dot chain line in FIG. 1 is a fish reef 5 which uses a combination of fish reef units described later.
The fish reef unit 1 includes a frame body 2, a concrete portion 3, and a thinning material 4.
The frame body 2 is an angle frame steel material that crosses from side to side at substantially equal intervals between the outer frame 21 that is formed by enveloping the outline in a rectangular shape by an angle steel material, and the front F and rear B of the outer frame 21. The intermediate frame 22 is formed in a square shape and fixed by welding or the like (hereinafter simply referred to as “welding”). The intermediate frame 22 is passed across the outer frame 21 and the left and right outer surface sides of the intermediate frame 22 and the ends are welded. The front, middle and rear three space blocks are formed by the outer frame 21 and the intermediate frame 22 from the front F to the rear B as a whole. A support member 24 is fixed to the front F and rear B of the outer frame 21 in the middle of the upper and lower stages in a horizontal direction, which is a preferable component effective for use in assembling the fish reef unit 1 described later. In this example, the outer dimensions of the outer frame 21 are a front / rear depth D6m, a left / right W2m, and a height H1.2m.
As shown by hatching in FIG. 2, the concrete portion 3 is at least half the size of each space block at the front and rear of the front space block and the rear space block of the frame body 2, It is formed in an integral rectangular shape. A plurality of thinnings 4 (three in this example) are embedded in the concrete portion 3 with a horizontal spacing in the upper row (four in this example). The opening 31 having a substantially triangular cross section is bored. Although the opening 31 here is not an essential configuration, it is useful as a habitat for Ise shrimp and the like as will be described later, and the cross section may not be substantially triangular, but it is more effective. The arrangement of the thinned material 4 will be described later.
The thinned wood 4 is made of a plurality of long pieces, for example, three cedars or bushes in this example, having a diameter of 100 to 200 mm and a length of 6 to 10 m, and embedded between the concrete parts 3 from the front end to the rear end. It is included.
Further, in this example, hollow portions 42 are processed in advance at the cores of both ends of the thinned material 4 embedded in the concrete portion 3, but this is not an essential configuration, but as described later, the cavity of the concrete portion 3 Is promoted and the habitat for Ise shrimp is provided.
Each part dimension about this example mentioned above is an example, Comprising: It is not limited to this.

Next, assembly of the fish reef unit 1 will be described.
First, the frame body 2 is assembled into a rectangular shape as shown in FIGS. 1 and 2 by the outer frame 21, the intermediate frame 22, and the brace 23 of each component of the frame body 2. The front and rear terminals of the three thinned materials 4 are placed on the support material 24 and positioned in the upper stage when viewed from the front of the frame body 2, and four openings 31 having a substantially triangular cross section are provided in the lower stage. As for the vertical relationship between the thinned material 4 and the opening 31, the positions of the upper and lower stages may be changed.
Next, although not shown in the figure, the front frame block is applied to the front and left and right outer sides, the rear space block is applied to the rear and left and right outer sides and the bottom, and the wooden frame is applied after the front space block and before the rear space block. To form an enclosure. Since the diameter of the thinned material 4 penetrating through the wooden frame varies, the wooden frame is prepared according to the diameter of each thinned material 4.
Concrete is poured into this formwork, and the concrete is solidified through curing. Three thinnings 4 are embedded and held in the upper part of the front and rear concrete parts 3, and four openings having a substantially triangular cross section are held in the lower part. The fish reef unit 1 in which the portion 31 is drilled is obtained.

Next, the fish reef 5 using the fish reef unit 1 will be described with reference to FIGS.
The fish reef unit 1 can be used alone, but usually a plurality of fish reef units 1 are installed in combination in accordance with the conditions of the sea area. As an example, FIGS. 3 and 4 show an example of three modules in which six units of fish reef units 1 are combined.
The reefs 5 are indicated by 1a, 1b, 1c, 1d, 1e, and 1f, respectively, in order to distinguish the reef units 1 that are configured in the description, the upper row is 1a, 1b, the middle row is 1c, 1d, and the lower row is 1e, 1f. Each unit has the same configuration and is modularized by a combination of a pair of fish reef units 1.
First, a pair of lower fish reef units 1e and 1f are arranged in parallel in a longitudinal and longitudinal direction with a distance between the left end of the fish reef unit 1e and the right end of the fish reef unit 1f. The front and rear depths D of the frame 21 are the same. Between the fish reef units 1e and 1f, the upper and lower frame connecting members 6 are horizontally transferred and welded to the frames 21 of both adjacent units, and both units are connected, and the bracing 61 similar to the bracing 23 crosses and crosses. The end is welded.
The middle pair of fish reef units 1c, 1d are placed 90 degrees on the lower fish reef units 1e, 1f, and the middle and lower frames 21 are welded to each other via the frame connecting member 7.
The pair of upper fish reef units 1 a and 1 b are mounted by rotating 90 degrees on the middle fish reef units 1 c and 1 fd, and the middle upper frame 21 is welded to each other through the frame connecting member 7. Here, the fish reef units 1a and 1b are placed in the same direction as the lower fish reef units 1e and 1f.
As described in detail above, the reef unit of the reef 5 is arranged in a pair of modules in each step, with the longitudinal direction of the thinned material 4 being rotated 90 degrees with respect to the lower step, respectively. The upper stage and the upper stage are fixed to each other, and are stacked in a so-called cross-beam shape.

  The above-described fish reef 5 has three sets of modules of a pair of fish reef units stacked in three stages, but the conditions of the sea area to be installed are various depending on conditions such as area, water depth, tidal current, waves, etc. Depending on these conditions, the fish reef unit 1 can be used alone, only a pair of reef unit modules can be used, or multiple sets of modules can be stacked and used in a cross-beam configuration. It is.

The function and utility of the fish reef 5 installed on the seabed as detailed above will be described below.
(I) Since the thinned wood 4 creates and maintains a good habitat for marine organisms such as plankton, seafood, and seaweeds, the function as a fish reef can be effectively and quickly obtained. However, the durability of thinned timber as a fish reef is only a few years due to damage caused by ship carnivorous insects, etc., and the risk of damaging fishery facilities and marine structures such as stabbed nets and stationary nets in the sea due to deterioration and outflow Although various research and development have been made, it is still not suitable for practical use.
On the other hand, in the fish reef 5 of the present invention, the thinned wood 4 is combined with the fish reef unit 1 surrounded by the frame body 2 and embedded in the concrete part 3, and when installed on the sea floor, such as tides, waves, etc. It is the structure which has the amount of concrete of the weight which does not move or fall over with respect to external force, and the thinned material 4 does not float out of the enclosed frame 2 little.
(B) After the thinned wood 4 embedded in the concrete portion 3 is consumed and disappears after a lapse of time, the traces of the thinned wood 4 embedded in the concrete portion 3 become hollow and inhabit the Ise shrimp, etc. It becomes a perfect cavity as a place, hideout, and feed ground.
By hollowing the cores at both ends of the thinned material 4 embedded in the concrete part 3 in advance, the hollowing of the concrete part 3 is promoted.
Moreover, the opening part 31 drilled previously is useful as habitats for Ise shrimp and the like. Ise shrimp has the property of living by rubbing on an object, and by making the opening a triangle, it can touch two sides of the body regardless of the size of the Ise shrimp, so it is effective as a habitat .
(C) In the example of the fish reef 5, since the longitudinal direction of the thinned wood 4 is placed in a direction rotated 90 degrees with the lower stage, it is stacked in a multi-stage horizontal well pattern, so it can flexibly respond to the conditions of the installation location The top surface area can be secured widely, and depending on the water depth, it can function as a seaweed bed for useful seaweeds.
(D) By stacking fish reef units, shelves are formed at the top and bottom of the concrete part to function as habitats and hideouts for shrimp and fry.
(E) In summary, the thinning material 4 at the beginning of the installation of the fish reef 5 demonstrates an immediate collection function of fish, and after several years, the traces of the thinning material 4 embedded in the concrete part 3 become hollow. Can function as a breeding reef such as a habitat for lobsters.

  The fish reef of the present invention is capable of exhibiting an immediate fish collection function and a function as a breeding reef, and is therefore suitable for the effective use of a large amount of thinned wood desired from the forestry industry.

An example of the unit for fish reef of this invention is shown, (a) Top view, (b) Side view, (c) Front view. It is a perspective view of the unit for fish reef of FIG. 1, (a) Whole figure, (b) Front end enlarged view. An example of the fish reef using the unit for fish reef of FIG. 1 is shown, (a) Top view, (b) Side view, (c) Front view. It is a perspective view of the fish reef of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a-1f Fish reef unit 2 Frame body 21 Outer frame 22 Intermediate frame 23, 61 Bracing 24 Support material 3 Concrete part 31 Opening part 4 Thinning material 42 Hollow part 5 Fish reef 6, 7 Frame connection material

Claims (5)

A) An outer frame formed by enclosing an outline in a rectangular shape, an intermediate frame fixed in a square shape across the front and rear sides of the outer frame middle part, and left and right sides of the outer frame and the intermediate frame A frame having struts crossing the outer surface and having front, middle, and rear space blocks formed by the outer frame and the intermediate frame; and b) in front of the front and rear space blocks. And a rectangular shaped front and rear concrete part integrally formed with the outer frame on the rear side, and c) a plurality of thinned timbers embedded through the concrete part at substantially horizontal intervals A reef unit characterized by 2. The fish reef unit according to claim 1, wherein the thinned material is embedded in the upper part of the concrete part, and a plurality of openings are formed at intervals in the lower part of the concrete part substantially horizontally. The fish reef unit according to any one of claims 1 to 2, wherein a hollow portion is previously drilled in an end core of the thinned material embedded in the front and rear concrete portions. The pair of fish reef units according to any one of claims 1 to 3 are arranged in parallel with a distance in the longitudinal direction of the pair, and the front and rear are connected by upper and lower frame connecting materials, and the fish reef unit has a distance between left and right ends. A fish reef that is modularized with the same depth as the front and rear of the outer frame. A fish reef comprising a plurality of sets of fish reefs according to claim 4, wherein the upper tiers are rotated by 90 degrees sequentially with respect to the lower tiers and placed in a cross-beam shape and fixed to each other.