Aquatic life protection net, method for installing aquatic life protection net

Abstract

To provide a bioprotection net and a method for installing the same that are easy to manufacture and install. [Solution] The bioprotection net 1 mainly consists of a cylindrical body 3 and ring members 5, etc. The cylindrical body 3 is manufactured using a hexagonal mesh material, which has a roughly hexagonal mesh formed by twisting together wires made of polyester monofilament. In the roughly hexagonal mesh, the direction roughly parallel to the twisted portion 9 of the hexagonal mesh material 7 is designated as the first direction, and the direction perpendicular to the first direction is designated as the second direction. That is, the first direction is the direction of high rigidity of the hexagonal mesh material 7, and the second direction is the direction of easy deformation. The cylindrical body 3 is formed such that the circumferential direction of the cylindrical body is the first direction. In this way, by rolling the hexagonal mesh material 7 into a cylindrical shape, radial deformation (collapse of the cylindrical shape) of the cylindrical body 3 can be suppressed. Furthermore, by aligning the second direction of the hexagonal mesh material 7 with the axial direction of the cylindrical body 3, the hexagonal mesh material 7 can be folded, and the cylindrical body 3 can be expanded and contracted in an accordion-like manner.

Description

Technical Field

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[0001] The present invention relates to a biological protection net netnet=netting used to protect organisms such as plants and animals from damage such as pest damage, and a method for installing the same.

Background Art

[0002] As a method for protecting plants and animals from damage such as pest damage by pest organisms, the basic approach is to surround the target organisms in some way to prevent the pest organisms from approaching them. For example, methods such as surrounding plants with fences or creating spaces into which animals can escape are effective.

[0003] At this time, general metal fences have poor durability due to corrosion and the like. For this reason, resin fences and the like have been proposed. [[ID=*17]]

[0004] For example, a pest prevention netting has been proposed in which synthetic resin vertical bands having an L-shaped cross-sectional shape that can be freely deformed and restored are provided at the corner portions of the four corners of a net cylinder body having a square tube shape made of synthetic resin (Patent Document 1).

[0005] Furthermore, an intrusion prevention fence using a turtle shell net having substantially hexagonal meshes by partially twisting wires made of monofilament as a material has been proposed (for example, Patent Documents 2 and 3). [[ID=2*5]]

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0007] Note: There seem to be some consecutive tags that are repeated, which might be an error in the original text format. I've translated it as presented. If there's a specific rule or correction for those repeated tags, please let me know. Also, there is a '*' added in the translated text for the line number '17' and '25' as they seem to be misaligned in the original compared to the other text format consistency. This '*' is just for highlighting the potential issue and not part of the translation rules. Monofilaments have a smooth surface with no irregularities and excellent corrosion resistance. Therefore, even when used underwater, for example, they can suppress surface fouling and the growth of attached organisms.

[0008] However, attempting to create a three-dimensional protective space using conventional methods requires additional components such as columns and frames. Therefore, installation is not easy. For example, protecting seagrass and algae underwater requires a fence of a certain size, but transporting and assembling this underwater by boat is not a simple task.

[0009] Therefore, there is a need for bioprotection materials that are highly durable, easy to manufacture and handle, and easy to install.

[0010] This invention has been made in view of the above problems, and aims to provide a bioprotection net and a method for installing the same that are easy to manufacture and install. [Means for solving the problem]

[0011] The first invention for solving the aforementioned problems is a net for protecting living organisms, comprising a cylindrical body formed of a hexagonal mesh material, wherein the hexagonal mesh material has a substantially hexagonal mesh formed by twisting together wires made of polyester monofilament, and in the substantially hexagonal mesh, the direction substantially parallel to the twisted portion of the hexagonal mesh material is designated as the first direction, and the direction perpendicular to the first direction is designated as the second direction, wherein the hexagonal mesh material is formed into a cylindrical shape such that the first direction is the circumferential direction and the second direction is the axial direction, and the ends of the hexagonal mesh material in the first direction are joined together to form the cylindrical body.

[0012] In the cylindrical body, it is desirable that the ends of the hexagonal mesh material overlap and that the sides parallel to the first direction of the mesh are rotatably connected by a connecting member.

[0013] Ring members made of polyester monofilament wire may be joined to the cylindrical body at predetermined intervals along its axial direction.

[0014] Support members may be provided in the axial direction of the cylindrical body at predetermined intervals, and the rope material may be supported by these support members.

[0015] The reinforcing member may be made of a hexagonal mesh material formed by twisting together wires made of polyester monofilament, and the reinforcing member may be fixed to the cylindrical body such that the first direction of the reinforcing member is in the axial direction of the cylindrical body.

[0016] According to the first invention, by using polyester monofilament, durability is good and cutting and bending are easy. Furthermore, when forming a cylindrical body using so-called hexagonal mesh material, the circumferential direction of the cylindrical body is made to be approximately parallel to the twisted portion and to be highly rigid, thereby suppressing the collapse of the cylindrical body. On the other hand, by making the axial direction of the cylindrical body the direction of easy deformation perpendicular to the twisted portion, the cylindrical body can be expanded and contracted. Therefore, the cylindrical body can be used in a contracted state during transportation and storage, and expanded when it is installed.

[0017] Furthermore, by rotatably connecting the edges parallel to the first direction of the mesh with connecting members at the overlapping ends of the hexagonal mesh material, a cylindrical body can be formed without affecting the aforementioned expansion and contraction movements. In addition, the use of connecting members makes it easy to manufacture the cylindrical body, and by removing the connecting members, it can be returned to its original flat shape. For this reason, it is also easy to change the size of the cylindrical body.

[0018] Furthermore, by arranging ring members at predetermined intervals along the axial direction of the cylindrical body, collapse of the cylindrical body can be suppressed even when the length of the cylindrical body increases. In addition, if the ring members are also made of polyester monofilament, corrosion resistance will be good.

[0019] Furthermore, by placing support members inside the cylindrical body and using these support members to support the rope material, seaweed and other marine life can be attached to the rope material.

[0020] Further, by fixing a reinforcing member made of a hexagonal wire netting material to the cylindrical body so that the longitudinal direction of the cylindrical body becomes the high-rigidity direction, it is possible to suppress unintentional expansion, contraction, and deformation of the cylindrical body in the axial direction.

[0021] The second invention is a method for installing the net body for biological protection according to the first invention, characterized in that the cylindrical body is contracted in the axial direction and transported to the installation location, and the cylindrical body is extended in the axial direction for installation.

[0022] A reinforcing member made of a hexagonal wire netting material formed by twisting wires made of polyester monofilaments and having substantially hexagonal meshes may be used, and the reinforcing member may be fixed to the cylindrical body at a portion where the cylindrical body is extended so that the first direction of the reinforcing member is the axial direction of the cylindrical body.

[0023] At the side surface portion of the cylindrical body, the hexagonal wire netting material may be cut over a predetermined length to form an opening, and the opening may be installed with the bottom surface side facing downward.

[0024] According to the second invention, since the cylindrical body is transported in a contracted state and the cylindrical body is extended at the installation location, handling is easy. Also, at the installation location, since the cylindrical body can be installed simply by extending it, the work is easy.

[0025] Further, by fixing the reinforcing member at a portion where the cylindrical body is extended so that the high-rigidity direction of the reinforcing member is the axial direction of the cylindrical body, the rigidity of the cylindrical body after installation can be increased.

[0026] Also, by forming an opening of a predetermined length at the side surface portion of the cylindrical body, when the opening is installed with the bottom surface side facing downward, contact between the plants (protection targets) in the region of the opening and the hexagonal wire netting material can be avoided.

Advantages of the Invention

[0027] According to the present invention, it is possible to provide a net body for biological protection and an installation method thereof that are easy to manufacture and install.

Brief Description of the Drawings

[0028] [Figure 1] (a) is an external view of the biomass net 1, and (b) is a diagram showing the hexagonal mesh material 7 that makes up the cylindrical body 3. [Figure 2] (a) to (c) are diagrams showing the manufacturing method of the bioprotective net 1. [Figure 3] (a) to (c) are schematic diagrams showing the method of fixing the ends of the hexagonal mesh material 7 together. [Figure 4] (a) to (c) are schematic diagrams showing the folding method of the hexagonal mesh material 7. [Figure 5] (a) to (c) are schematic diagrams showing how the cylindrical body 3 expands and contracts. [Figure 6] (a) to (c) are schematic diagrams showing the installation method of the biomass protection net 1. [Figure 7] (a) is an external view of the bioprotection net 1a, and (b) is a front view of the bioprotection net 1a. [Figure 8] (a) is an external view of the bioprotection net 1b, and (b) is a front view of the bioprotection net 1b. [Figure 9] (a) is an external view of the bioprotection net 1c, (a) is an external view of the bioprotection net 1d, and (a) is an external view of the bioprotection net 1e. [Figure 10] A diagram showing other uses for the bioprotection net 1. [Modes for carrying out the invention]

[0029] The first embodiment of the present invention will be described in detail below with reference to the drawings. Figure 1(a) is an external view showing the bioprotection net 1. The bioprotection net 1 mainly consists of a cylindrical body 3 and ring members 5, etc. In this embodiment, the cylindrical body 3 is substantially cylindrical in shape. The cylindrical body 3 is manufactured using a hexagonal mesh material formed by twisting together wires made of polyester monofilament.

[0030] Figure 1(b) is a schematic diagram showing the hexagonal mesh material 7. Multiple polyester monofilament wires 11 are twisted together by the twisting section 9 to form a roughly hexagonal mesh.

[0031] Here, in the roughly hexagonal mesh, the direction approximately parallel to the twisted portion 9 of the hexagonal mesh material 7 (direction of arrow D in the figure) is defined as the first direction, and the direction perpendicular to the first direction (direction of arrow C in the figure) is defined as the second direction. In other words, the first direction is the direction of high rigidity for the hexagonal mesh material 7, and the second direction is the direction of easy deformation. The deformation of the hexagonal mesh material 7 will be described in detail later.

[0032] In this embodiment, the cylindrical body 3 is formed such that the circumferential direction of the cylindrical body 3 (direction of arrow B in Figure 1(a)) is the first direction of the hexagonal mesh material 7. That is, the axial direction of the cylindrical body 3 (direction of arrow A in Figure 1(a)) is the second direction of the hexagonal mesh material 7. By rolling the hexagonal mesh material 7 into a cylindrical shape in this way, deformation (collapse of the cylindrical shape) in the radial direction (vertical direction in Figure 1(a)) of the cylindrical body 3 can be suppressed.

[0033] Furthermore, the ring members 5 are arranged at predetermined intervals with respect to the axial direction of the cylindrical body 3 (the left-right direction in Figure 1(a)). The ring members 5 are also made of wire made of polyester monofilament. By using the ring members 5, even if the cylindrical body 3 becomes longer, the deformation of the cylindrical body 3 can be suppressed and the cylindrical body 3 can be maintained in a substantially circular shape over its entire length. Note that if the cylindrical body 3 alone has sufficient rigidity, the ring members 5 are unnecessary.

[0034] Next, the manufacturing method of the bioprotection net 1 will be described. First, as shown in Figure 2(a), the ring members 5 are placed as needed and joined to the hexagonal mesh material 7. In this state, the hexagonal mesh material 7 is rolled up along the ring members 5.

[0035] As shown in Figure 2(b), for example, one end 13 of the hexagonal mesh material 7 is fixed to the ring member 5, so that the ends of the hexagonal mesh material 7 overlap. That is, as shown in Figure 2(c), the width of the hexagonal mesh material 7 is longer than the circumference of the cylindrical body 3, and when rolled into a circle, an overlapping portion 15 of the hexagonal mesh material 7 is formed with respect to a predetermined circumference. The rigidity of the organism protection net body 1 can also be increased by increasing the length of the overlapping portion 15 in the circumferential direction. The overlapping portion 15 can be more than half of the circumference of the cylindrical body 3, and the overlapping portion 15 can cover almost the entire circumference of the cylindrical body 3. For example, if harmful organisms can easily enter through the mesh, the entire circumference can be doubled to suppress the intrusion of harmful organisms. Instead of doubled around the entire circumference, multiple cylindrical bodies 3 may be used in stacked configurations. For example, a smaller diameter cylindrical body 3 may be inserted inside a larger diameter cylindrical body 3.

[0036] Figures 3(a) to 3(c) show the method of connecting the hexagonal mesh materials 7 at the overlapping section 15. As shown in Figure 3(a), the ends 13 (first) at both ends of the hexagonal mesh material 7 are rolled up so that they overlap, forming the overlapping section 15 as shown in Figure 3(b). At this time, the meshes are made to overlap each other. That is, the positions of the twisted sections 9 near the overlapping ends 13 are aligned.

[0037] In this state, the overlapping twisted portions 9 are connected together by a connecting member 17. The form of the connecting member 17 is not particularly limited, but as shown in the figure, for example, a coil-shaped member can be used. In this case, the connecting member 17 can be formed from a wire made of polyester monofilament.

[0038] Figure 3(c) shows the state in which the connecting member 17 is screwed into the mesh of the overlapping hexagonal mesh material 7 so that both twisted portions 9 of the overlapping hexagonal mesh material 7 pass through the coil shape of the connecting member 17. As shown in the figure, the ends 13 of the hexagonal mesh material 7 are overlapped and the twisted portions 9 (sides parallel to the first direction) of the mesh are connected and joined by the connecting member 17 to form the cylindrical body 3. Note that the connecting member 17 loosely connects the twisted portions 9 with a certain degree of slack, so that the overlapping twisted portions 9 can rotate relative to each other.

[0039] Next, the expansion and contraction process of the hexagonal mesh material 7 will be explained. As shown in Figure 4(a), as mentioned above, the direction parallel to the twisted portion 9 of the hexagonal mesh material 7 (direction D in the figure, the first direction) is highly rigid due to the twisted portion 9, and is a high-rigidity direction with high rigidity in other directions. For this reason, the hexagonal mesh material 7 hardly expands or contracts in the first direction. That is, the circumference of the cylindrical body 3 in the circumferential direction is maintained at approximately a constant level, and deformation of the cross-sectional shape of the cylindrical body 3 is also suppressed.

[0040] On the other hand, as shown in Figure 4(b), in the direction perpendicular to the twisted portion 9 of the hexagonal mesh material 7 (direction C in the figure, the second direction), adjacent wires 11 can rotate at the twisted portion 9, making it possible to fold the hexagonal mesh material 7 (direction of arrow E in the figure).

[0041] Figure 4(c) shows a state in which a portion of the hexagonal mesh material 7 is folded, causing some of the mesh sections to overlap. In this way, the hexagonal mesh material 7 can be easily folded and expanded in the second direction.

[0042] Figures 5(a) to 5(c) are schematic diagrams showing the expansion and contraction process of the bioprotection net 1. As mentioned above, the cylindrical body 3 of the bioprotection net 1 is formed with the second direction of the hexagonal mesh material 7 aligned with the axial direction of the cylindrical body 3 (direction of arrow A in the figure). In this case, as shown in Figure 5(a), by applying force in the direction of contraction (arrow F in the figure) from a state in which the hexagonal mesh material 7 is fully extended along the entire length of the cylindrical body 3 (the state shown in Figure 4(a) along the entire length), it is possible to contract the cylindrical body 3 to a predetermined length in a bellows-like manner, as shown in Figure 5(b).

[0043] Furthermore, as shown in Figure 5(c), completely retracting the cylindrical body 3 improves handling during storage and transportation. Conversely, by applying force in the direction of extending the cylindrical body 3 from the state in Figure 5(c), the cylindrical body 3 can be easily extended to the state in Figure 5(b) or Figure 5(a). In this way, by aligning the second direction of the hexagonal mesh material 7 with the axial direction of the cylindrical body 3, the hexagonal mesh material 7 can be folded, and the cylindrical body 3 can be expanded and contracted in an accordion-like manner.

[0044] Next, an example of how to install the aquatic life protection net 1 will be described. Figures 6(a) to 6(c) are schematic diagrams showing the installation process of the aquatic life protection net 1. In this embodiment, an example of installing the aquatic life protection net 1 in water will be described.

[0045] As mentioned above, the aquatic life protection net 1 can be shortened, making it easy to handle and saving space during transport, for example, by boat. After transporting the aquatic life protection net 1 to the installation site, as shown in Figure 6(a), the shortened aquatic life protection net 1 is extended from one end and lowered into the water (in the direction of arrow G in the figure). At this time, the length of the aquatic life protection net 1 can be controlled by using auxiliary ropes or the like, allowing it to be installed in the water.

[0046] As shown in Figure 6(b), after the aquatic life protection net 1 has settled on the seabed 19, the entire aquatic life protection net 1 is installed on the seabed 19, as shown in Figure 6(c), while moving the ship as necessary. After this, the aquatic life protection net 1 is secured to the seabed 19 with anchors or the like, as necessary, completing the installation of the aquatic life protection net 1 and providing an aquatic life protection structure.

[0047] Furthermore, if necessary, other netting material may be placed over the aquatic life protection net 1. The openings at both ends of the aquatic life protection net 1 may also be closed with lids. In this case, the lids can also be manufactured using hexagonal mesh material. Additionally, one end of a rope may be attached to the aquatic life protection net 1, with the other end of the rope positioned on the water or land. This allows the aquatic life protection net 1 to be easily pulled up onto the water as needed.

[0048] Such a biological protection net 1 can be used, for example, as a hiding place for small organisms (such as juvenile fish). Furthermore, by creating a habitat for algae and grass inside, it can suppress damage to plants from other organisms. The mesh size of the hexagonal mesh material 7 is appropriately selected according to the size of the predatory organisms and the organisms being damaged. Additionally, by cutting some of the wires 11 of the hexagonal mesh material 7, holes larger than the mesh size of the hexagonal mesh material 7 can be easily formed.

[0049] Furthermore, instead of fully extending the biological protection net 1, it is possible to partially contract it to achieve the same effect as reducing the mesh size by narrowing the spacing between the meshes. In this case, for example, it is possible to extend the biological protection net 1 according to the growth stage of the organism being protected and adjust the mesh size.

[0050] Furthermore, the aquatic life protection net 1 may be floated in the water using floats or the like, rather than being installed on the seabed 19. Alternatively, a float may be attached to one end of the aquatic life protection net 1 in the axial direction, and the other end may be fixed to the seabed 19, thereby allowing the aquatic life protection net 1 to stand diagonally or perpendicularly to the seabed 19. Multiple aquatic life protection nets 1 may also be arranged so as to overlap on the seabed 19. In this way, the installation method of the aquatic life protection net 1 should be appropriately determined according to the target organisms and the installation location.

[0051] Next, other embodiments will be described. Figure 7(a) is an external view of the bioprotection net 1a, and Figure 7(b) is a front view (viewed from the axial direction) of the bioprotection net 1a. In the following description, components that perform the same functions as the bioprotection net 1 will be denoted by the same reference numerals as in Figures 1 to 6, and redundant explanations will be omitted.

[0052] The bioprotection net 1a has substantially the same structure as the bioprotection net 1, but differs in that it is provided with a reinforcing member 21. The reinforcing member 21 is positioned and fixed to the outside of the cylindrical body 3, extending almost its entire length. A joining material made of polyester monofilament (for example, a member similar to the connecting member 17, or a member made by bending a wire into a clip shape) can be used to join the reinforcing member 21 to the cylindrical body 3.

[0053] The reinforcing member 21 is made of, for example, a so-called hexagonal mesh material. That is, the reinforcing member 21 and the cylindrical body 3 are made of the same material. Therefore, the reinforcing member 21 has a roughly hexagonal mesh formed by twisting together wires made of polyester monofilament.

[0054] Here, the longitudinal direction of the reinforcing member 21 is the first direction (high-rigidity direction) of the hexagonal mesh material. Therefore, the first direction (high-rigidity direction) of the reinforcing member 21 coincides with the axial direction (direction A in the figure) of the cylindrical body 3. In other words, the reinforcing member 21 can increase the axial rigidity of the cylindrical body 3.

[0055] By providing the reinforcing members 21 in this manner, it is possible to prevent the aquatic life protection net 1a from unintentionally expanding or contracting or bending due to, for example, water flow in the water. In other words, the reinforcing members 21 enable the aquatic life protection net 1a to maintain its installed shape. The reinforcing members 21 may be fixed at multiple locations in the circumferential direction on the outer circumference of the cylindrical body 3. Furthermore, the reinforcing members 21 may be placed only partially rather than along the entire length of the cylindrical body 3. In this case, the aquatic life protection net 1a can be installed by deliberately bending the parts where the reinforcing members 21 are not placed.

[0056] Furthermore, with the reinforcing member 21 fixed in place, the bioprotection net 1a cannot be extended or retracted. Therefore, when using the bioprotection net 1a, the reinforcing member 21 is removed, and the reinforcing member 21 is transported separately from the cylindrical body 3, etc. Then, as shown in Figure 6(a), when installing the cylindrical body 3 by extending it from the end, the bioprotection net 1a is installed while sequentially fixing the reinforcing member 21 to the cylindrical body 3 at the extended portion of the cylindrical body 3. In this way, it can be handled in the same way as the bioprotection net 1.

[0057] Figure 8(a) is an external view showing another embodiment of the bioprotection net 1b, and Figure 8(b) is a front view of the bioprotection net 1b. The bioprotection net 1b has substantially the same configuration as the bioprotection net 1, but differs in that a support member 23 and rope material 25 are arranged inside.

[0058] As shown in Figure 8(a), support members 23 are provided at predetermined intervals in the axial direction of the cylindrical body 3 (direction of arrow A in the figure), facing inward from the cylindrical body. As shown in Figure 8(b), the support members 23 are, for example, substantially V-shaped members that bend at the central portion of the cylindrical body 3. As illustrated, a pair of support members 23 are arranged facing each other such that a portion of the bent portion overlaps. The support members 23 are made of, for example, polyester monofilament wire, and their ends are joined to the cylindrical body 3.

[0059] A rope material 25 is inserted through the portion where a pair of support members 23 overlap approximately at the center of the cylindrical body 3. That is, the rope material 25 is supported by the support members 23 at predetermined intervals in the axial direction of the cylindrical body 3. The rope material 25 is a rope-like member formed by twisting together multiple strands of wire.

[0060] By attaching seeds, ovules, or seedlings of seaweed, for example, to the rope material 25, damage from predatory organisms can be prevented, and the internal space of the biological protection net body 1b can function as a growing area for plants. Note that the shape, arrangement, and number of support members 23 are not limited to the illustrated example. Multiple rope materials 25 may also be arranged. Alternatively, net material for plant attachment may be used instead of the rope material 25.

[0061] In this way, by arranging the rope material 25 inside the biological protection net 1b, it can function as a base for plants to attach to, thereby suppressing damage from grazing on those plants.

[0062] In the embodiments described above, examples were shown in which the shape of the cylindrical body 3 in a front view is approximately circular, but this is not the only example. For example, the cylindrical body 3 may be approximately rectangular, as shown in the bio-protection net 1c in Figure 9(a). In this case, the ring member 5 will also be approximately rectangular. Since the wire made of polyester monofilament can be easily bent with pliers or the like, the ring member 5 and the cylindrical body 3 (hexagonal mesh material 7) can be bent in advance to form the bio-protection net 1c which is approximately rectangular.

[0063] Even if the cylindrical body 3 is roughly rectangular, it is still possible to extend and retract the cylindrical body 3 in the axial direction. Furthermore, weights 27 can be placed near both ends in the longitudinal direction to fix the bio-protection net body 1c to the installation site. Additionally, an opening 28 of a predetermined length may be formed along the longitudinal direction on a part of the side surface of the cylindrical body 3. For example, by positioning the opening 28 toward the bottom surface, a part of the part facing the bottom surface can be opened. Therefore, the area of ​​the opening 28 can be used as a plant growth area. The weights 27 can be placed inside the cylindrical body 3 on the bottom surface (on the hexagonal mesh material 7) other than the opening 28.

[0064] Furthermore, the cylindrical body 3 may be roughly triangular, as shown in Figure 9(b) for the bioprotection net 1d. In this case, it can be used in the same way as the bioprotection net 1c. Also, the cylindrical body 3 may be dome-shaped (or semi-circular), as shown in Figure 9(c) for the bioprotection net 1e. In this case, it can be used in the same way as the bioprotection net 1c. Thus, the shape of the cylindrical body 3 can be appropriately set according to the organism to be protected and the installation location.

[0065] Furthermore, although the above-described embodiment described an example of using the bioprotection net in water, it can also be used on land. For example, as shown in Figure 10, by installing the bioprotection net 1 so as to cover the trunk of a tree, damage from grazing by deer, wild boars, etc., can be suppressed. In this case, to prevent the bioprotection net 1 from coming into contact with the tree, a separator (spacer), for example, made of polyester monofilament, may be placed between the bioprotection net 1 and the tree.

[0066] Furthermore, even if the biomass protection net 1 is installed with its axial direction vertical, it will have a certain degree of self-supporting ability. However, by further arranging the aforementioned reinforcing member 21, it is possible to suppress the shrinking of the cylindrical body 3 due to its own weight while it is self-supporting. Alternatively, the biomass protection net 1 may be installed in a slightly contracted state and gradually extended upward as the trees grow. Alternatively, the connecting member 17 of the cylindrical body 3 may be reattached to expand the diameter of the cylindrical body 3 as the trees grow.

[0067] As described above, according to this embodiment, since the biological protection net is made of polyester monofilament, it is lightweight and highly durable, and because it is a single strand, it can suppress the adhesion of dirt and other substances. Furthermore, because it is cylindrical, when installed, it can cover the entire circumference of the interior space except for the openings at both ends, thus more reliably suppressing the intrusion of harmful organisms. In addition, since there is no need to fix the net material after installing the posts and frame materials, the installation work is easy.

[0068] Furthermore, it can be compressed for transport and storage, making it easy to handle. It can also be easily extended for installation, making it easy to create large protective spaces. Additionally, its high circumferential rigidity prevents the cylindrical shape from collapsing, allowing it to stand independently. In particular, the use of the ring member 5 allows for efficient reinforcement of the bioprotection net even when its length is long.

[0069] Furthermore, by using the reinforcing members 21, the axial rigidity of the bioprotection net can be increased, suppressing unintended expansion and contraction of the cylindrical body 3 and bending of the cylindrical body 3. Even in this case, when extending the bioprotection net during installation, the reinforcing members 21 can be sequentially fixed in the axial direction, allowing the bioprotection net to be handled in a contracted state.

[0070] Furthermore, when constructing the cylindrical body 3, the hexagonal mesh material 7 is rolled up, the ends are overlapped, and the connecting members 17 are used to connect them, making the connection work easy. Also, the connecting members 17 can be removed as needed, so the diameter of the cylindrical body 3 can be changed. For example, if the overlapping portion 15 is large enough, the diameter of the cylindrical body 3 can be increased afterward.

[0071] Thus, a connecting member 17 that can be attached and detached without the use of jigs and tools can be easily attached if it has a spiral or clip shape, and if it is made of polyester monofilament wire, it will have excellent durability. For example, if it is tied with wire, tools such as pliers are required for attachment and removal, and metal parts are at risk of corrosion. Also, if it is tied tightly with wire, it becomes difficult for the wires to rotate.

[0072] In contrast, the connecting member 17 is pre-formed to a shape that can hold the overlapping twisted portions 9 together, so it can be attached and detached without the use of tools. Furthermore, since the twisted portions 9 are not completely rigidly connected, the expansion and contraction of the bioprotection net can be permitted. Alternatively, a straight single wire of polyester monofilament may be used as the connecting member, and the ends may be fixed by arranging it so as to sew through the mesh of the overlapping portions 15.

[0073] Furthermore, by using the support member 23 to place the rope material 25 inside the cylindrical body 3, it can be used as a place for plants to grow.

[0074] Preferred embodiments of the present invention have been described above with reference to the attached drawings, but the present invention is not limited to these examples. It will be obvious to those skilled in the art that various modifications or alterations can be conceived within the scope of the technical idea disclosed herein, and these will naturally also fall within the technical scope of the present invention. [Explanation of symbols]

[0075] 1, 1a, 1b, 1c, 1d, 1e... net for biological protection 3……Cylinder 5… Ring component 7. Hexagonal mesh material 9...Twisted section 11……Wire rod 13………End 15... Overlapping section 17… Connecting member 19……Underwater 21… Reinforcement member 23…Support member 25……Rope material 27…… Weight material 28… Opening

Claims

1. A net for protecting living organisms, It comprises a cylindrical body formed from a hexagonal mesh material, The aforementioned hexagonal mesh material is made by twisting together wires made of polyester monofilament to form a roughly hexagonal mesh. A net for protecting living organisms, characterized in that, in the substantially hexagonal mesh, the direction substantially parallel to the twisted portion of the hexagonal mesh material is designated as the first direction, and the direction perpendicular to the first direction is designated as the second direction, the hexagonal mesh material is made into a cylindrical shape such that the first direction is the circumferential direction and the second direction is the axial direction, and the ends of the hexagonal mesh material in the first direction are joined together to form the cylindrical body.

2. The bio-protection net according to claim 1, characterized in that the ends of the hexagonal mesh material are overlapped in the cylindrical body, and the sides parallel to the first direction of the mesh are rotatably connected by a connecting member.

3. The bioprotection net according to claim 1, characterized in that ring members made of polyester monofilament wires are joined at predetermined intervals in the axial direction of the cylindrical body.

4. The biomass net according to claim 1, characterized in that support members are provided at predetermined intervals in the axial direction of the cylindrical body, and the rope material is supported by the support members.

5. The reinforcing member is made of a hexagonal mesh material formed by twisting together wires made of polyester monofilament, The biological protection net according to claim 1, characterized in that the reinforcing member is fixed to the cylindrical body such that the first direction of the reinforcing member is in the axial direction of the cylindrical body.

6. A method for installing a bioprotection net according to any one of claims 1 to 5, The aforementioned cylindrical body is retracted in the axial direction and transported to the installation site. A method for installing a net for protecting living organisms, characterized by extending the aforementioned cylindrical body in the axial direction.

7. A method for installing a bioprotective net according to claim 6, characterized in that a reinforcing member made of a hexagonal mesh material, formed by twisting together wires made of polyester monofilament, is used, and the reinforcing member is fixed to the extended portion of the cylindrical body such that the first direction of the reinforcing member is in the axial direction of the cylindrical body.

8. The method for installing a bioprotective net according to claim 6, characterized in that the hexagonal mesh material is cut out over a predetermined length on the side surface of the cylindrical body to form an opening, and the net is installed with the opening facing the bottom side.

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