JP5435021B2 - Seaweed block and protective net - Google Patents

Description

The present invention relates to a seaweed block and a protection net , and more particularly to a seaweed block and a protection net that can protect seaweed from seabed organisms such as sea urchins and snails.

  Conventionally, this type of protective fence is used to prevent invasion of submarine habitats that move the seabed and prey on the seabed organisms in a protected area for protecting seabed organisms that grow on the seabed. And a fence main body standing upright surrounding the entire periphery of the protection area, and a crossover prevention provided to prevent the submarine habitat from getting over the protective fence provided along the upper portion of the fence main body. A protective fence (for example, Patent Document 1) is proposed in which the body for preventing overriding is formed in a hook shape extending outward from the protection area at a predetermined angle with the fence body. However, such a protective fence is easily damaged or washed away by waves, and has a problem of durability due to rust.

  On the other hand, the artificial seaweed main body and the chain are configured. The artificial seaweed main body has a leaf-like body attached to the rope for planting with a predetermined interval in the longitudinal direction of the rope for planting. It consists of a band and a shape part that inhibits the action of sea urchins such as folds formed on both sides of this band, and a chain is attached to the rope for planting, An artificial seaweed 1 or artificial seaweed 11 is arranged so as to surround an arbitrary fixed section, which is composed of a ring-shaped fall prevention leg that protrudes outward in the horizontal direction at a predetermined interval on the side surface of the chain. Artificial seaweeds are artificial seaweeds (for example, Patent Document 2) and nets that use the habit of hating the sea urchins to sway and hit the sea urchins. The bar net or the bar net group is the length of the bar net or the bar net group. When a chain shorter than a certain length is attached and the bar net or bar net group and the chain are bound with a string, an internal crimp is formed, which is the difference between the length of the bar net or bar net group and the length of the chain, A sea urchin, abalone, and tub behavior control device (for example, Patent Document 3) arranged so as to surround an arbitrary fixed section has been proposed.

JP 2007-14305 A Japanese Patent Laid-Open No. 10-4817 Japanese Patent Laid-Open No. 10-4808

  In the artificial seaweed of Patent Document 2 and the control device of Patent Document 3, it is possible to prevent sea urchins from entering and exiting by placing them so as to surround an arbitrary fixed section. It is difficult, and the conventional one requires a plurality of members such as a leaf body, a rope for planting, a single chain and a ring-shaped fall prevention leg like the artificial seaweed, and has a complicated structure and cost. There is a problem.

In view of the above-described problems, the present invention has an object to provide a seaweed block and a protection net that are simple in structure and can protect seaweed from sea urchins.

  The invention according to claim 1 is a seaweed block including a block main body and a protective net provided on the outer surface of the block main body, and a net main body having flexibility of the protective net is wound around a side surface of the block main body. The upper part of the net body is characterized in that a plurality of vertical separating parts are provided at intervals in the winding direction, and a swinging part is provided between adjacent separating parts.

The invention according to claim 2, and characterized in that said attaching the approximate center of the height direction of the net body on a side surface of said block body, and arranged in a non-fixed state lower edge of said net body to said block body To do.

  The invention according to claim 3 is characterized in that a linear material is provided at substantially the center of the net body in the height direction, the linear material is fixed to the block body, and the net body is attached.

Further, the invention according to claim 4 is characterized in that the net body is made of a synthetic resin whose specific gravity is lighter than seawater, and the net of the net body has a substantially rhombus shape that is long in the height direction.
The invention according to claim 5 is a protective net that includes a net body and a fixing means for fixing the net body, and protects seaweeds from marine organisms. And a plurality of oscillating portions provided between adjacent separating portions.

  According to the configuration of claim 1, the rocking part swings in the sea, so that sea creatures such as sea urchins do not approach the rocking part, and the seaweed above the rocking part attached to the block body eats the seabed creatures. Will not be damaged. Further, since the net body is simply processed and attached to the block body, the structure is simplified and the cost is reduced.

  Moreover, according to the structure of Claim 2, since the lower edge side of a net main body also rocks | fluctuates away from the side surface of a block main body, it will become difficult to approach a seabed organism further.

  Moreover, according to the structure of Claim 3, a net main body can be simply attached with a linear material, and by fixing the approximate center of the height direction of a net main body to a block main body with a linear material, an upper edge and The net body can be fixed while the lower edges are not fixed. Moreover, even if a submarine organism climbs between the lower edge of the net body and the side surface of the block body, the upward movement is restricted by the linear material.

Further, according to the configuration of claim 4, since the specific gravity is lighter than seawater, it is easy to swing and the net body spreads in the horizontal direction, so that no gap is generated between the swinging parts, and the lower edge of the net body And a gap between the side surface of the block main body are likely to occur.
Further, according to the configuration of claim 5, when the rocking part swings in the sea, seabed organisms such as sea urchins do not approach the rocking part, and seaweeds above the rocking part are eaten by the seabed organisms and are damaged. Not receive. Further, since only the net body is processed, the structure becomes simple and inexpensive.

It is a perspective view of the block for seaweed which shows Example 1 of this invention. It is a perspective view of a block main body same as the above. It is a top view of a block main body same as the above. It is sectional drawing of the principal part of the block for seaweed same as the above. It is a front explanatory drawing of the mesh of a net body same as the above.

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each Example, the seaweed block which is not before is obtained by employ | adopting the seaweed block different from the past, and the block for seaweed is each described.

  Sea urchins, an example of marine organisms, grow while feeding on seaweeds and detritus at the stage of juvenile sea urchins. Sea urchins play a role of movement and defense by spines, and the spines are connected by the base, connective tissue, and muscles, and the muscles can move around the spines. In addition, there is a fork with a tip of a suction cup between the thorns (interstep). The tube leg plays a role of movement, and the fork spine plays a role of cleaning the body surface and defending against drops.

  Recent research recognizes the visual function of spines, and is said to be able to detect the light rays hitting the spines and compare the intensity of the light to know the surrounding situation.

  In addition, according to the sea urchin ecology research, it is known that the fluttering thing is anaerobic, and the present invention maximizes this effect.

  Hereinafter, the seaweed block of the present invention will be described with reference to the accompanying drawings. 1 to 5 show Embodiment 1 of the present invention. As shown in FIG. 1, the block main body 1 of the seaweed block is made of concrete, and the block main body 1 has four sides from the central portion 2. And a recess 4 is formed in the center of the lower surface of the block body 1, and the outer side of the recess 4 is a contact portion serving as a grounding portion of the legs 3, 3, 3 and 3. It is the ground 3A, 3A, 3A, 3A. Accordingly, when the block body 1 is placed, a gap is formed between the placement surface and the lower surface of the block body 1 by the recess 4, and water can pass therethrough. Can suppress erosion. In addition, the latching | locking part (not shown) for suspension provided in the upper surface of the said center part 2 is provided, and this latching | locking part consists of a reverse U-shaped hook.

  Protruding portions 5 and 5 projecting outward are formed on both side portions of the leg portion 3 of the block main body 1, and the projecting portion 5 becomes narrower toward the tip, and the flat leg side surface 6 at the tip. Is formed. In the block main body 1 of this example, a tip side surface 6A is provided at the tip of the leg portion 3, and the tip side surface 6A and the side surface 6 are connected by an oblique side surface 6B. In addition, in the leg part 3, the space | interval of the right and left diagonal side surfaces 6B and 6B becomes narrow toward 6 A of front end side surfaces. And the block main body 1 has the leg side surface 6, the front end side surface 6A, and the diagonal side surface 6B as a side surface, and these all make flat surface shape.

  In addition, a seaweed mat 8 made of resin fibers serving as a seaweed growing portion is provided on the upper surface 7 of the block body 1, and the seaweed K is implanted by attaching roots such as vine lame mother algae to the seaweed mat 8. Can do.

  The protective net 11 includes a net body 12 and fixing means 13 for fixing the net body 12 to the side surface 6 of the block body 1. Further, in this example, the fixing means 13 includes a rope member 14 that is a linear member and a concrete nail 15 that fixes the rope member 14 to the block body 1.

  The net body 12 is a knotted net made of a synthetic resin such as polyethylene and has a specific gravity of approximately 0.95 and lighter than the specific gravity of seawater (1.026). The wire body 16A, 16B constituting the net body 12 is about 400d / 36 wires, and the wire body 16A, 16B is a braided net that is tied together. The mesh 16 of the net body 12 is a vertically long rhombus. The mesh 16 has a shape in which the length L of the one side wire 16A is equal to the length L of the other side wire 16B in the intersecting direction, and the length L is about 25 mm. The rope member 14 is made of a synthetic resin such as polypropylin. In this way, by using the knot net which is a knotted net, it spreads in the horizontal direction in the sea, but has a certain shape retaining property. In addition, d represents denier. In addition to the above, the wires 16A and 16B are 200d / 12, 200d / 15, 200d / 18, 200d / 21, 400d / 12, 400d / 15, 400d / 18, 400d / 24, 400d / 30 or so can be used, and by setting 200d to 400d / 12 to 36 in this way, a good effect can be obtained by the swinging part described later. It is done.

  Then, the rope member 14 is attached to a substantially central position in the vertical direction of the net body 12 having a substantially constant width in the vertical direction. In this case, the rope member 14 is attached to the net body 12 alternately through the mesh 16 from the front side to the back side and from the back side to the front side. The net body 12 is disposed so that the vertical diagonal of the mesh 16 is longer than the diagonal in the horizontal direction, and the mesh 16 is a rhombus that is long in the vertical direction of the block main body 1. Further, above the rope member 14, the net body 12 is provided with a plurality of vertical separating portions 17 at predetermined intervals in the winding direction, and the separating portions 17 can be formed by cutting the net body 12. it can. An oscillating portion 18 is formed between the adjacent separating portions 17 and 17, and as shown in FIG. 1, as an example, the oscillating portion 18 substantially corresponding to the lateral width of the tip side surface 6A and the substantially lateral width of the oblique side surface 6B. The separating portion 17 is provided so that the swinging portion 18 corresponding to the swinging portion 18 and the swinging portion 18 substantially corresponding to the lateral width of the adjacent leg side surfaces 6 and 6 are formed. Further, the vertical dimension of the net body 12 is about 400 to 1000 mm, preferably about 500 to 700 mm, and thus the upper width of the rope member 14 is about 200 to 500 mm, preferably about 250 to 350 mm. It is easy to swing and the necessary shape retention is obtained.

  Next, a method for attaching the protective net 11 will be described. As shown in FIGS. 1 and 4, the net body 12 is wound around the side surface of the block body 1, and the rope member 14 is adjusted to the height of the side surfaces 6, 6A, 6B. The nail hole 21 is previously drilled on the side surfaces 6, 6 </ b> A, 6 </ b> B by a hammer drill as a drilling means. Then, a concrete nail 15 is pierced into the rope member 14, the concrete nail 15 is inserted into the hole 21, and is fixed with an adhesive as necessary. In this case, the nails 15 are arranged at substantially equal intervals, and the intervals are about 50 cm. In addition, it is preferable that the horizontal direction edge of the net body 12 is wound around the block body 1 so that the edges on both sides are partially overlapped.

  When the seaweed block having the protective net 11 attached to the side surface is installed on the seabed in this manner, the seaweed K grows on the seaweed mat 8. Then, when the rocking portion 18 swings on the seabed, seafloor organisms such as sea urchins do not adhere to the rocking portion 18, and the seaweed K on the upper surface 7 is not damaged. In this case, the net body 12 is easy to swing because the specific gravity is lighter than seawater. In addition, since the mesh 16 of the protective net 11 is vertically long, the top and bottom of the net body 12 expands in the left-right direction in the mounted state, and a gap between the lower edge 12S of the net body 12 and the side surface of the block body 1 is generated. As shown in FIG. 3, the net body 12 is substantially vertically shaped. As a result, the lower side of the net body 12 is also swung by the flow of the tide, and even if a marine organism climbs along the side surface from the gap, the upper part is blocked by the rope material 14 and cannot climb. .

  Thus, in this embodiment, corresponding to claim 1, a seaweed block comprising a block main body 1 and a protective net 11 provided on the outer surface of the block main body 1, 6A and 6B are wound with a net body 12 having the flexibility of the protective net 11, and a plurality of vertical separating portions 17 are provided at an upper portion of the net body 12 at intervals in the winding direction, and adjacent separating portions 17, Since the oscillating part 18 is provided between 17, the oscillating part 18 oscillates in the sea, so that seabed organisms such as sea urchins do not approach the oscillating part 18 and are located above the oscillating part 18 attached to the block body 1. Seaweed K can be prevented from being eaten by marine organisms and damaged. Further, since the net body 12 is simply processed and attached to the block body 1, the structure is simplified and the cost is reduced.

  Thus, in this embodiment, corresponding to claim 2, the center of the net body 12 in the height direction is attached to the side surfaces 6, 6A, 6B of the block body 1, and the lower edge 12S of the net body 12 is attached to the block body. 1, the lower edge 12S side of the net body 12 also swings away from the side surfaces 6, 6A, 6B of the block body 1, so that it becomes even more difficult for the seabed organisms to approach.

  Thus, in this embodiment, corresponding to claim 3, the rope member 14 is provided at the approximate center in the height direction of the net body 12, the rope member 14 is fixed to the block body 1, and the net body 12 is attached. Therefore, the net body 12 can be easily attached by the rope material 14, and the upper edge and the lower edge 12 </ b> S are not attached to each other by fixing the approximate center of the net body 12 in the height direction to the block body 1 by the rope material 14. The net body 12 can be fixed in a fixed state. Further, even if a submarine organism climbs between the lower edge 12S of the net body 12 and the side surfaces 6, 6A, 6B of the block body 1, the upward movement is restricted by the rope material 14.

Thus, in the present embodiment, corresponding to claim 4, the net body 12 is made of a synthetic resin whose specific gravity is lighter than seawater, and the mesh 16 of the net body 12 has a substantially rhombus shape that is long in the height direction. Since the specific gravity is lighter than seawater, it is easy to swing, and the net body 12 slightly spreads in the lateral direction, so that no gap is generated between the swinging portions 18, and the lower edge 12S of the net body 12 and the side surface of the block body 1 A gap is likely to occur between 6, 6A and 6B.
Thus, in the present embodiment, corresponding to claim 5, the net body 12 and the fixing means 13 for fixing the net body 12 are provided, and the protection net 11 protects seaweeds from seabed organisms. At the top of 12 is provided with a plurality of vertical separating portions 17 at intervals, and since the swinging portion 18 is provided between the adjacent separating portions 17, 17, the swinging portion 18 swings in the sea, It is possible to prevent marine organisms such as sea urchins from approaching the rocking part 18, and the seaweed K above the rocking part 18 from being eaten by the seabed organisms and being damaged. Further, since only the net body 12 is processed, the structure is simple and inexpensive.

  Further, as an effect of the embodiment, the separation portion 17 substantially corresponding to the lateral width of the tip side surface 6A, the swinging portion 18 corresponding to the approximate lateral width of the oblique side surface 6B, and the lateral width of the adjacent leg side surfaces 6 and 6 are substantially supported. Since the oscillating portion 18 is formed, the oscillating portion 18 is not positioned at the corner portion and is easily oscillated. Further, since the net body 12 is a knotted net, in particular, a knotted net obtained by tying the wires 16A and 16B, it spreads in the horizontal direction in the sea, but has a certain shape retaining property. Furthermore, the rope member 14 for fixing the net body 12 can be easily attached to the side surface of the block body 1 by the concrete nails 15. Further, the protection net 11 can be easily manufactured by folding the net body 12 having a substantially constant width in two and attaching the rope member 14 to the folded portion. Furthermore, seaweed roots that have flowed, for example, adhere to the net body 12, and seaweed can be grown.

  The present invention is not limited to this embodiment, and various modifications can be made within the scope of the gist of the present invention. For example, the block body is not limited to the substantially cross shape of the embodiment, and can be applied to various blocks. Further, the linear material is not limited to the rope material, and may be a belt-like material. Further, in the embodiment, the side surface is substantially perpendicular to the bottom surface, but may be oblique. Furthermore, although the protective net for the entire circumference of the block body is provided, it may be provided partially.

1 Block body 6 Leg side surface 6A Tip side surface 6B Oblique side surface
11 Protective net
12 Net body
12S lower edge
13 Fixing means
14 Rope material (linear material)
15 Concrete nails
16 mesh
17 Separation part
18 Oscillating part

Claims (5)

A seaweed block comprising a block main body and a protective net provided on the block main body, wherein a net main body having flexibility of the protective net is wound around a side surface of the block main body, and a vertical direction is formed on an upper portion of the net main body. A plurality of separation parts are provided at intervals in the winding direction, and a rocking part is provided between adjacent separation parts. It said mounting a substantially center of the height direction of the net body on a side surface of said block body, seaweed block according to claim 1, wherein the lower edge of said net body, characterized in that arranged in a non-fixed state in the block body. The seaweed block according to claim 2, wherein a linear material is provided at substantially the center in the height direction of the net body, the linear material is fixed to the block body, and the net body is attached. The seaweed block according to claim 3, wherein the net body is made of a synthetic resin having a specific gravity lighter than seawater, and the mesh of the net body has a substantially rhombus shape that is long in the height direction. A net having a net body and a fixing means for fixing the net body, and is a protective net for protecting seaweeds from marine organisms. A plurality of vertical separation portions are provided at intervals on the top of the net body, and adjacent to the net. A protective net characterized in that a swinging part is provided between the mating separating parts.

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