JP2015149928A - Method for attaching net for growing algae and equipment for growing algae - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for attaching net for growing algae, in which breakage of the net for growing algae due to contact with frame material can be prevented.SOLUTION: The net for growing algae comprises: a netting member formed into a planar shape; and main ropes, which are formed thicker than sub ropes constituting the netting member and are attached to the netting member. The net for growing algae is attached to frame material in a way at least a part of the main rope is positioned between the netting member and frame material, so that the netting member is kept in a position separate from the frame material.

Description

  The present invention relates to an attachment method for attaching an algae-growing net for protecting an algae-growing environment formed on a water bottom or a reef material to a frame material installed in the growing environment, and an algae formed by the method It relates to training equipment.

  Various methods are known as methods for growing algae in water. For example, a region in which algae spores and algae themselves are attached to reef material to grow algae on the reef material (hereinafter referred to as algae growth region). And a method of growing algae on the reef material by installing such reef material in water. However, in the water where many organisms (predatory organisms) that feed on algae live, it is difficult for algae to grow on reef materials.

  Then, in order to protect the algae on a reef material from predatory organisms and to form the environment where algae is easy to grow, the method of covering algae growing field with a net is proposed (refer to patent documents 1). In such a method, intrusion of predatory organisms into the net is prevented by the net, so that algae on the reef can be prevented from becoming food for the predatory organisms. Thereby, the environment which is easy to grow algae on reef material is formed.

JP 2007-6796 A

  As a method of fixing the net used as described above (hereinafter also referred to as algae growing net) around the algae growing area, a frame material is installed around the algae growing area, and a binding band is attached to the frame material. The method of fixing the net for algae growth using the is adopted. However, in such a method, the algae-growing net fixed to the frame member may be swung by the influence of the water flow, so that the algae-growing net and the frame material are in contact with each other, and the algae-growing net may be damaged. There is.

  Then, this invention makes it a subject to provide the attachment method of the algae growth net which can prevent the breakage of the algae growth net by contact with the algae growth net and a frame material.

  The method for attaching an algae-growing net according to the present invention is for attaching an algae-growing net that protects the algae-growing environment to a frame material that is arranged around a region for growing algae formed on a water bottom or reef material. The algae-growing net is attached to the net-like member, and the algae-growing net is attached to the net-like member formed so as to be thicker than the net-like member formed in a planar shape and the sub rope constituting the net-like member. The net member is separated from the frame member by attaching the algae-growing net to the frame member so that at least a part of the parent rope is located between the net member and the frame member. It is held in position.

  According to such a configuration, when the algae-growing net is attached to the frame member, at least a part of the master rope is located between the mesh member and the frame member, so that the mesh member is separated from the frame member. Become. Thereby, it can prevent that a net-like member contacts with a frame material, and it is worn out and damaged, and invasion of a predatory organism to the field surrounded by a net for algae growth can be prevented over a long period of time. .

  The frame member includes a curved outer surface, and the master rope includes a curved outer surface having a curvature radius of 0.3 times or more with respect to a curvature radius of the curved outer surface of the frame member. The algae-growing net is preferably attached to the frame so that the outer surface and the curved outer surface of the master rope come into contact with each other.

  According to such a configuration, since the radius of curvature of the parent rope becomes the above numerical value, the algae growing net is attached to the frame member in a state where the mesh member is bent along the outer periphery of the parent rope. In this case, the net member is held in the master rope at a position that is reliably separated from the frame material. For this reason, it can prevent that a mesh member contacts and wears a frame material, and it can prevent, and invasion of predatory organisms to the field surrounded by the net for algae growth can be prevented over a long period of time. .

  The algae growing net is preferably immersed in the sea in a state of being attached to a frame member.

  According to such a configuration, when the algae-growing net is immersed in seawater, the net members constituting the algae-growing net are swollen with seawater and are easily worn. However, the master rope is positioned between the frame member and the mesh member, and the mesh member is separated from the frame member. For this reason, it can prevent that a mesh member contacts and wears a frame material, and it can prevent, and invasion of predatory organisms to the field surrounded by the net for algae growth can be prevented over a long period of time. .

  The algae growing facility according to the present invention is an algae growing system in which a net for algae growing that protects the algae growing environment is attached to a frame material arranged around a region for growing algae formed on the water bottom or reef material. The algae-growing net is a facility comprising: a net-like member formed in a planar shape; and a master rope formed so as to be thicker than a child rope constituting the net-like member and attached to the net-like member. In the state where the algae growing net is attached to the frame material, at least a part of the master rope is positioned between the mesh member and the frame material, so that the mesh member is held at a position separated from the frame material. It is comprised so that it may be comprised.

  As described above, according to the present invention, it is possible to prevent the algae growing net from being damaged by the contact between the algae growing net and the frame material.

The perspective view which shows the state by which the algae growth net was attached to the frame material, and the algae growth equipment was formed by the attachment method of the algae growth net concerning this embodiment. (A) is XX sectional drawing of FIG. 1, (b) is YY sectional drawing of FIG. (A) is sectional drawing which shows the state which attached the algae growth net | network to the pillar material by the attachment method of the algae growth net | network which concerns on other embodiment, (b) is algae growth which concerns on other embodiment. Sectional drawing which shows the state which attached the net for algae upbringing to the beam material with the attachment method for a net. (A) is sectional drawing which shows the state which attached the algae growth net to the pillar material by the attachment method of the algae growth net concerning other embodiments, and (b) is algae concerning other embodiments. Sectional drawing which shows the state which attached the algae growth net to the beam material with the attachment method of the growth net. The figure which showed the attachment state to the frame material of the net for algae growth in the test example 1. FIG. The figure which showed the attachment state to the frame material of the net for algae growth in the test example 2. FIG. The figure which showed the attachment state to the frame material of the net for algae growth in the test example 3. FIG. The figure which showed the attachment state to the frame material of the net for algae growth in the test example 4. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the method for attaching an algae-growing net according to the present invention is a frame disposed around a region for growing algae formed on a water bottom or reef material (hereinafter also referred to as algae-growing region). In this method, the algae growing net 1 is attached to the material A. In the present embodiment, the algal growth region is formed on the reef material B. The reef material B includes a reef material B1 for growing algae and a reef material base B2 on which a plurality of the reef material B1 is placed. Then, an algae growing region is formed on the growing reef material B1, and the frame material A is disposed on the reef material base B2.

  In the present embodiment, the frame material A is composed of a plurality of pillar materials A1 arranged along the vertical direction around the algae growing region and a beam material A2 passed between adjacent pillar materials A1. Is done. Further, the frame material A (specifically, the column material A1 and the beam material A2) includes an outer surface (hereinafter, also referred to as a curved surface) that is curved to have a predetermined radius of curvature. The algae growing net 1 is attached to the frame material A (specifically, the pillar material A1 and the beam material A2), so that the algae growing region is covered with the algae growing net 1.

  As shown in FIG. 2 (a), the algae-growing net 1 is thicker than the net-like member 2 formed in a net-like shape and the sub-leak 2a constituting the net-like member 2 (for example, 1.5 The master rope 3 is provided with a thickness that is not less than 15 times and not more than 15 times, or not less than 2 times and not more than 13.5 times. In addition, the master rope 3 says the site | part formed thicker than the child rope 2a in the net | network 1 for algae growth. For example, the parent rope 3 may be formed only by one rope formed thicker than the child rope 2a, or other ropes may be wound around the one rope so that it is more than the child rope 2a. It may be formed to be thick. In the present embodiment, the net 1 for growing algae 1 is configured by binding a single rope formed thicker than the child rope 2a and the net-like member 2 with a binding rope (not shown). The master rope 3 is formed by tying the binding rope around the material.

  The net-like member 2 is formed by arranging a plurality of sub ropes 2a in a lattice shape. When the algae growing net 1 is attached to the frame material A, the master rope 3 is disposed at a position where the mesh member 2 and the frame material A overlap. Further, the master rope 3 is configured so that at least a part (substantially the whole in the present embodiment) protrudes to one surface side of the mesh member 2 in a state of being bound to the mesh member 2. Further, the master rope 3 has a curvature of 0.3 times or more, preferably 0.42 times or more of the curvature radius of the curved surface provided in the frame material A (specifically, the column material A1 and the beam material A2). An outer surface having a radius is provided. In addition, the curvature radius of the master rope 3 means the curvature radius of the curved outer surface in the cross section orthogonal to the direction where the master rope 3 extends in the state where the master rope 3 is extended linearly. In this embodiment, since the cross section is circular, the radius of curvature is the radius of the cross section.

  The algae-growing net 1 as described above has a frame so that at least a part of the parent rope 3 (a portion protruding to one surface side of the net member 2) is positioned between the net member 2 and the frame material A. It is attached to the material A (specifically, the column material A1 and the beam material A2). Specifically, in the cross section perpendicular to the vertical direction, the columnar material A1 has an outer surface (curved surface) A1a that is curved so as to have a predetermined radius of curvature, and a direction that intersects each other (specifically, a substantially orthogonal direction). ) Includes a pair of extending surfaces A1b and A1b extending from the curved surface A1a. And at least a part of the master rope 3 (the part protruding to one surface side of the mesh member 2) is located between the curved surface A1a and the mesh member 2, and the master rope 3 is arranged along the pillar material A1. As shown, the algae-growing net 1 is disposed on the side of the pillar material A1. Under the present circumstances, it arrange | positions so that one mesh-like member 2 and the other mesh-like member 2 may make an angle (specifically substantially 90 degrees) less than 180 degrees centering on the master rope 3. As a result, the columnar material A <b> 1 is positioned between the one mesh member 2 and the other mesh member 2.

  Then, the algae-growing net 1 and the pillar material A1 (that is, the net-like member 2, the master rope 3, and the pillar material A1) are bound with a binding material (for example, a binding band) C, for algae growth. The net 1 is attached to the pillar material A1. In such a state, the master rope 3 is located between the curved surface A1a of the pillar material A1 and the mesh member 2, and the curved outer surface of the master rope 3 is in contact with the curved surface A1a of the pillar material A1. . Thereby, the net-like member 2 is maintained in a state of being separated from the curved surface A1a and the extended surface A1b (in other words, the pillar material A1).

  On the other hand, as shown in FIG. 2B, the beam material A2 has a substantially circular cross section in the vertical direction. That is, the beam member A2 includes a curved outer surface (curved surface) A2a having a predetermined radius of curvature over the entire circumference. And at least a part of the master rope 3 (the part projecting to one surface side of the mesh member 2) is located between the curved surface A2a and the mesh member 2, and the master rope 3 is arranged along the beam A2. As shown, the algae-growing net 1 is disposed on the side of the beam material A2. Under the present circumstances, it arrange | positions so that one mesh-like member 2 and the other mesh-like member 2 may make an angle (specifically substantially 90 degrees) less than 180 degrees centering on the master rope 3. As a result, the beam material A <b> 2 is positioned between the one mesh member 2 and the other mesh member 2.

  Then, the algae-growing net 1 and the beam material A2 (that is, the net-like member 2, the master rope 3, and the beam material A2) are bound by a binding material (for example, a binding band) C, for algae growth. The net 1 is attached to the beam material A2. In such a state, the master rope 3 is positioned between the curved surface A2a of the beam member A2 and the mesh member 2, and the curved outer surface of the master rope 3 is in contact with the curved surface A2a of the beam member A2. . Thereby, the mesh member 2 is maintained in a state of being separated from the curved surface A2a (in other words, the beam member A2).

  As described above, the algae growing net 1 is attached to the frame material A (specifically, the column material A1 and the beam material A2), thereby forming an algae growing facility. The algae-growing equipment is disposed in the sea together with the reef material B, so that prey organisms can be prevented from entering the algae-growing region covered with the algae-growing net 1 by the algae-growing net 1. Thereby, the growth of algae in the algae growth region is efficiently performed.

  As described above, according to the method for attaching the algae-growing net and the algae-growing equipment according to the present invention, the algae-growing net can be prevented from being damaged by the contact between the algae-growing net and the frame material.

  That is, when the algae-growing net 1 is attached to the frame material A, since at least a part of the master rope 3 is located between the mesh member 2 and the frame material A, the mesh member 2 is separated from the frame material A. It becomes a state. Thereby, it can prevent that the mesh-like member 2 contacts with the frame material A, wears, and breaks, and prevents the invasion of predatory organisms into the area surrounded by the net 1 for algae growth over a long period of time. be able to.

  When the radius of curvature of the master rope 3 is as described above, the algae-growing net 1 is attached to the frame material A in a state where the mesh member 2 is bent along the outer periphery of the master rope 3. In addition, the net-like member 2 is held by the master rope 3 at a position reliably separated from the frame material A. For this reason, it can prevent that the mesh-like member 2 contacts and wears the frame material A and is damaged, and prevents predatory organisms from entering the area surrounded by the algae-growing net 1 for a long period of time. be able to.

  Moreover, when the algae growing net 1 is immersed in seawater, the net-like member 2 constituting the algae growing net 1 swells in seawater and is easily worn. However, the master rope 3 is positioned between the frame material A and the mesh member 2 so that the mesh member 2 is separated from the frame material A. For this reason, it can prevent that the mesh-like member 2 contacts and wears the frame material A and is damaged, and prevents predatory organisms from entering the area surrounded by the algae-growing net 1 for a long period of time. be able to.

  Note that the method for attaching the algae-growing net and the algae-growing equipment according to the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. Further, the configurations and methods of the plurality of embodiments described above may be arbitrarily adopted and combined (even if the configurations and methods according to one embodiment are applied to the configurations and methods according to other embodiments). Of course, it is of course possible to arbitrarily select configurations, methods, and the like according to various modifications described below and employ them in the configurations, methods, and the like according to the above-described embodiments.

  In the said embodiment, although the edge parts of the net-like member 2 are connected via the master rope 3, it is not limited to this, For example, as shown to Fig.3 (a) (b), each A plurality of algae-growing nets 1 may be configured by binding individual master ropes 3 to the end portions of the net-like member 2. In such a case, a plurality of algae-growing nets 1 may be attached to the pillar material A1 and the beam material A2.

  Moreover, in the said embodiment, although it is comprised so that the master rope 3 may be located between the curved surface of the frame material A, and the net-like member 2, it is not limited to this, For example, FIG. ), The master rope 3 may be configured to be positioned between the extended surface A1b (that is, a non-curved plane) of the pillar material A1 and the mesh member 2.

  Moreover, in the said embodiment, it is comprised so that one master rope 3 may be located between pillar material A1 or beam material A2, and the net-like member 2. FIG. That is, the net member 2 is held at a position separated from the pillar material A1 and the beam material A2 by one master rope 3, but is not limited to this, as shown in FIG. The plurality of parent ropes 3 may be arranged along the outer periphery of the pillar material A1 between the pillar material A1 and the net member 2. That is, the area | region which overlaps with pillar material A1 in the net-like member 2 may be comprised so that it may be hold | maintained in the position spaced apart from pillar material A1 by the some master rope 3.

  Moreover, in the said embodiment, although the mesh members 2 connected via the master rope 3 are arrange | positioned along a different direction (specifically orthogonal direction), it is not limited to this. For example, as shown in FIG. 4B, the algae is cultivated so that the mesh members 2 connected via the master rope 3 are arranged along one direction (specifically, linearly). The net 1 may be attached to the pillar material A3.

  Moreover, in the said embodiment, since the cross section of beam material A2 is formed in the substantially circular shape, curved surface A2a which has a predetermined curvature radius is formed over the perimeter of beam material A2. For example, when the algae-growing net 1 is attached to the beam material A2, the curved surface A2a may be provided only in a region in contact with the master rope 3. Moreover, the cross section of the master rope 3 may not be circular, and only the area | region contact | abutted with the frame material A may be formed so that it may have a predetermined curvature radius.

  Moreover, in the said embodiment, although the algae growth net | network 1 is arrange | positioned so that the algae growth area | region formed on the reef material B may be covered, it is not limited to this, For example, a seaweed bed is put on a water bottom. When forming, the frame material A may be arrange | positioned around the predetermined area | region (namely, algae growth area | region) of a water bottom, and the net 1 for algae growth may be attached to this frame material A.

  Examples of the present invention will be described below.

<Test Example 1>
The radius of the master rope 3 and the radius of the frame material A formed in a columnar shape are the radii shown in Table 1 below, and the outer surfaces of the master rope 3 and the frame material A are in contact with each other as shown in FIG. The algae-growing net 1 was attached to the frame material A. At this time, an angle θ formed by an imaginary line L1 connecting the master rope 3 and the center of the frame material A and an imaginary line L2 along the mesh member 2 was 90 °. In such a state, it is recognized that the mesh member 2 is held at a position separated from the frame material A.
Also, as shown in FIG. 5B, the algae is grown by bringing the outer surfaces of the parent rope 3 and the frame material A into contact with each other so that the angle θ formed by the virtual line L1 and the virtual line L2 is 45 °. The net 1 was attached to the frame material A. Even in such a state, it is recognized that the mesh member 2 is held at a position separated from the frame material A.

<Test Example 2>
The radius of the master rope 3 and the radius of the frame material A formed in a columnar shape are the radii shown in Table 1 below, and the outer surfaces of the master rope 3 and the frame material A are in contact with each other as shown in FIG. The algae-growing net 1 was attached to the frame material A. At this time, an angle θ formed by an imaginary line L1 connecting the master rope 3 and the center of the frame material A and an imaginary line L2 along the mesh member 2 was 90 °. In such a state, it is recognized that the mesh member 2 is held at a position separated from the frame material A.
Further, as shown in FIG. 6B, the mesh member is obtained by setting the angle θ formed by the virtual line L1 and the virtual line L2 to 50.5 ° (that is, moving 39.5 ° from the initial state). It can be seen that 2 is held at a position spaced from the frame material A.

<Test Example 3>
The radius of the master rope 3 and the radius of the frame material A formed in a columnar shape are the radii described in Table 1 below, and the outer surfaces of the master rope 3 and the frame material A are in contact with each other as shown in FIG. The algae-growing net 1 was attached to the frame material A. At this time, an angle θ formed by an imaginary line L1 connecting the master rope 3 and the center of the frame material A and an imaginary line L2 along the mesh member 2 was 90 °. In such a state, it is recognized that the mesh member 2 is held at a position separated from the frame material A.
Further, as shown in FIG. 7B, the parent rope 3 and the frame are arranged so that the angle θ between the virtual line L1 and the virtual line L2 is 45 ° (that is, 45 ° is moved from the initial state). The algae-growing net 1 was attached to the frame material A by bringing the outer surfaces of the material A into contact with each other. In such a state, the mesh member 2 is in contact with the frame material A, but as shown in FIG. 7C, the angle θ between the virtual line L1 and the virtual line L2 is set to 60 ° ( That is, it is recognized that the mesh member 2 is held at a position separated from the frame material A by being moved by 30 ° from the initial state.

<Test Example 4>
The radius of the master rope 3 and the radius of the frame material A formed in a columnar shape are the radii shown in Table 1 below, and the outer surfaces of the master rope 3 and the frame material A are in contact with each other as shown in FIG. The algae-growing net 1 was attached to the frame material A. At this time, an angle θ formed by an imaginary line L1 connecting the master rope 3 and the center of the frame material A and an imaginary line L2 along the mesh member 2 was 90 °. In such a state, it is recognized that the mesh member 2 is held at a position separated from the frame material A.
Further, as shown in FIG. 8B, the parent rope 3 and the frame are arranged so that the angle θ formed by the virtual line L1 and the virtual line L2 is 60 ° (that is, moved by 30 ° from the initial state). The algae-growing net 1 was attached to the frame material A by bringing the outer surfaces of the material A into contact with each other. In such a state, the mesh member 2 is in contact with the frame material A. However, as shown in FIG. 8C, the angle θ between the imaginary line L1 and the imaginary line L2 is 75 ° ( That is, it is recognized that the mesh member 2 is held at a position separated from the frame material A by being moved by 15 ° from the initial state.

  As described above, when the radius-of-curvature ratio is 0.24 or more (preferably 0.3 or more), even when the algae-growing net 1 is swung by the water flow, the mesh member 2 and the frame material A Contact can be effectively suppressed. In particular, since the curvature radius ratio is 0.42 or more, even when the shaking movement of the algae-growing net 1 due to the water flow is intense, the contact between the mesh member 2 and the frame material A can be more effectively suppressed. Can do.

  DESCRIPTION OF SYMBOLS 1 ... Net for algae growth, 2 ... Net-like member, 2a ... Child rope, 3 ... Parent rope, A ... Frame material, A1 ... Column material, A1a ... Curved surface, A1b ... Extension surface, A2 ... Beam material, A2a ... Curve Surface, B ... reef material, B1 ... reef material for breeding, B2 ... reef material base

Claims (4)

A method for attaching an algae-growing net for attaching an algae-growing net that protects the algae-growing environment to a frame material arranged around a region for growing algae formed on a water bottom or reef material,
The algae-growing net includes a net-like member formed in a planar shape, and a master rope that is formed so as to be thicker than a child rope constituting the net-like member and attached to the net-like member,
The net member is held at a position separated from the frame member by attaching the algae growing net to the frame member so that at least a part of the master rope is located between the net member and the frame member. How to attach the net for growing algae. The frame member includes a curved outer surface, and the master rope includes a curved outer surface having a curvature radius of 0.3 times or more with respect to the curvature radius of the curved outer surface of the frame member,
2. The method for attaching an algae growing net according to claim 1, wherein the algae growing net is attached to the frame so that the curved outer surface of the frame member and the curved outer surface of the parent rope are in contact with each other.   The method for attaching an algae growing net according to claim 1 or 2, wherein the algae growing net is immersed in the sea in a state of being attached to a frame member. An algae growing facility in which a net for algae growing that protects the algae growing environment is attached to a frame material arranged around an area for growing algae formed on the bottom of the water or reef material,
The algae-growing net includes a net-like member formed in a planar shape, and a parent rope that is formed to be thicker than a child rope constituting the net-like member and is attached to the net-like member. With the net attached to the frame member, at least a part of the master rope is positioned between the mesh member and the frame member so that the mesh member is held at a position separated from the frame member. Algae growing facility characterized by that.

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