JP2018000066A - Net material structure, biological protection structure, and biological protection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide means that can prevent the feeding damage to environmental resources, agriculture, forestry and fishery resources simply, inexpensively and effectively.SOLUTION: Synthetic resin wire having rigidity is twisted and net knitting is performed, and thereby a substantially tabular carapace net material 1 formed of substantially hexagonal mesh is obtained. In the net material, a net material structure P is provided in which the carapace net material 1 is fixed while being bent so that a longitudinal direction being an extending direction of a twisting alignment part 13 formed by twisting alignment may become substantially a curved shape. Also, a biological protection structure A for feeding damage prevention, etc., is provided which includes the net material structure P and a safety growth area R of a protected organism D separated from the external E by the net material structure P. As a result, the feeding damage to environmental resources, agriculture, forestry and fishery resources can be prevented simply, inexpensively and effectively.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a net material structure, a biological protection structure for controlling food damage, a biological protection method, and the like. More specifically, in a substantially flat turtle shell material in which a substantially hexagonal mesh is formed by twisting and knitting a rigid wire, the longitudinal direction, which is the direction in which the twisted portion extends, is substantially curved. A mesh structure fixed in a bent state, and the mesh structure, and a safe growth area of protected organisms separated from the outside by the mesh structure. The present invention relates to a biological protection structure provided, a similar biological protection method, and the like.

  Damage to environmental resources, agriculture, forestry and fisheries resources due to the ingestion of organisms is called food damage, which is a major problem in each field.

  For example, submarine bivalves such as clams are widely cultivated at the bottom of shallow waters such as intertidal zones, but they are severely damaged by naruto ray, black sea bream, and mussels. In areas where plants are cultivated, damage caused by deer, wild boars, etc. is significant. Ayu and eels are released in rivers, but the damage caused by birds such as cormorants is a serious problem for fishermen and fishing enthusiasts. In coral reefs, the damage caused by the abnormal breeding of giant starfish contributes to the massive death of corals. Seaweeds thrive in the sea to form seaweed beds, and seaweeds and kombu are also cultivated for food, but fish such as budai, aigo, black sea bream, shrimp, sea urchins, etc. Feeding damage contributes to the disappearance of seaweed beds and a decrease in yield.

Various countermeasures have been proposed against such damage. For example, Patent Document 1 discloses a submarine bivalve aquaculture structure having a net-like member covering the upper surface opening of a container, and Patent Document 2 fixes a vegetation protection sheet to an vegetation region in a state of being bent in an arch shape. Patent Document 3 discloses a method for protecting a small river fish from a bird that prey on the small river fish by setting a bird net in the river water. 4 shows a method for preventing the damage of corals from sea lions using a submarine net structure.Patent Document 5 shows that algae such as fish invades seaweeds where seaweeds are cultivated, and seaweeds are damaged. The damage prevention net structure which prevents this is disclosed, respectively.
JP 2012-60946 JP-A-2015-119690 JP 2005-58011 A JP 2005-40121 JP 2007-104933 A

  An object of the present invention is to provide means that can easily, inexpensively and effectively control damage to environmental resources, agricultural, forestry and fishery resources.

  In the present invention, the twisted portion formed by the twisting is extended in the substantially flat turtle shell material in which a substantially hexagonal mesh is formed by twisting and knitting a rigid wire. A mesh structure in which the turtle shell net is fixed in a bent state so that the longitudinal direction has a substantially curved shape, and the mesh structure and the protected organism separated from the outside by the mesh structure A safe growth area, and a biological protection structure for controlling food damage.

  The substantially flat-shaped turtle shell mesh material used in the present invention has a substantially hexagonal mesh formed by twisting together wire having rigidity to form a knitted mesh. In the turtle shell material, every other twisted portion is positioned on the substantially same straight line in the longitudinal direction, and structurally, the pair of twisted portions aligned in the longitudinal direction is rotated about the rotation axis. As a result, a fold line is formed in the longitudinal direction, and it can be bent in the width direction in a simple and recoverable manner. On the other hand, the tortoiseshell mesh material can be bent in the longitudinal direction because it is formed in a mesh structure, but the wire material has rigidity and the rotation axis by a set of twisted portions faces in the width direction. In principle, it will not bend. Then, when the tortoiseshell netting material is bent in the longitudinal direction in a substantially arch shape so that the ridgeline when bent is formed in a direction substantially perpendicular to the direction in which the twisted portion extends, the surface of the substantially arched shape is obtained. It exhibits high strength while maintaining appropriate elasticity and cushioning against the load applied from the outside.

  Therefore, like the net structure according to the present invention, by fixing the substantially flat turtle shell net material in a state where the longitudinal direction is bent so as to be a substantially curved shape, for example, contact of a harmful organism, Even when a load is applied from the outside due to wind, waves, water flow, etc., the overall shape of the substantially arch-shaped net member structure can be firmly held. Moreover, a space can be formed inside the net structure and can be stably maintained.

  In addition, the mesh structure can be formed using a substantially flat turtle shell material, and can be formed by bending and fixing the turtle shell mesh material. This can be done easily and the material cost can be kept relatively low.

  In this way, by installing this netting structure as a biological protection structure, for example, in a plant cultivation area, water bottom, etc., safe growth of protected organisms separated from the outside that cannot be reached by harmful organisms An area can be formed, and thereby, damage to environmental resources, agricultural, forestry and fishery resources can be controlled easily, inexpensively and effectively.

  According to the present invention, it is possible to easily, inexpensively and effectively control damage to environmental resources, agricultural, forestry and fishery resources.

<Regarding the net structure and the biological protection structure according to the present invention>
In the present invention, (1) a twisted portion formed by twisting is extended in a substantially flat-shaped turtle shell mesh material in which a substantially hexagonal mesh is formed by twisting together a rigid wire. A mesh structure in which the tortoiseshell mesh material is bent in a bent state so that the longitudinal direction, which is a direction, is substantially curved, and (2) a substantially hexagonal shape by twisting and knitting the rigid wire rod together. In the substantially flat-shaped turtle shell mesh material in which the mesh of the shape is formed, the turtle shell mesh material is bent so that the longitudinal direction, which is the extending direction of the twisted portion formed by the twisting, becomes a substantially curved shape. All of the biological protection structures for pest control including a net structure fixed in a state and a safe growth area of protected organisms separated from the outside by the net structure.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to FIG. 1 and FIG. In addition, this invention is not limited narrowly only to embodiment illustrated below.

  FIG. 1 is a schematic external perspective view showing an example of a biological protection structure according to the present invention, and FIG. 2 is a schematic plan view showing an example of a turtle shell net material applicable to the present invention.

  The biological protection structure A for food damage control illustrated in FIG. 1 is separated from the outside E by a substantially arched net structure P in which the turtle shell net 1 is fixed in a bent state, and the net structure P. And a safe growth area R for the protected organism D.

  In FIG. 1, the mesh structure P includes a tortoiseshell mesh material 1, fixing means 2 for fixing the tortoiseshell mesh material 1 in a bent state, and an abbreviation formed at both ends by flexing the tortoiseshell mesh material 1. It is formed by a closing member 3 for closing a semi-elliptical opening portion.

  As shown in FIG. 2, the tortoiseshell mesh material 1 is a mesh material in which a substantially hexagonal mesh 12 is formed by twisting and twisting the wire 11 and has a substantially flat plate shape.

  The wire 11 is a linear material for forming the turtle shell net 1 by knitting, and may be any material that can be knitted to form a substantially hexagonal mesh, and is not limited by the material of the wire. .

  For example, when the biological protection structure A is installed on the ground, it is preferable that the wire 11 has durability, that is, has weather resistance, breakage resistance, and wear resistance. When the biological protection structure A is installed at the bottom of the water, the wire 11 is preferably highly durable even under water conditions, and further has high water resistance, that is, high rust resistance and high corrosion resistance. It is preferable that

  Moreover, it is preferable that the wire 11 has rigidity while having predetermined elasticity (returnability). Thereby, the wire rod 11 itself is hardly bent, and the turtle shell net member 1 can be favorably bent by constricting the net structure.

  As such a wire 11, for example, a synthetic resin wire, or a wire in which an iron wire, a copper wire, a stainless steel wire, a galvanized iron wire or the like is covered with a synthetic resin is suitable. For example, the wire is a polyester monofilament. Is most preferred.

  Polyester monofilament is a thermoplastic engineering plastic produced using dicarboxylic acid and diol as main raw materials. Examples of the dicarboxylic acid component of the polyester include terephthalic acid, 2,6-naphthalenedicarboxylic acid, isophthalic acid, and 1,4-cyclohexanedicarboxylic acid. Examples of the diol component include ethylene glycol, butylene glycol, propylene glycol, Examples include tetramethylene glycol and 1,4-cyclohexanedimethanol. Polyester monofilaments synthesized by appropriately combining these dicarboxylic acid components and diol components can be used as appropriate. Of these, a polyester monofilament of polyethylene terephthalate in which 90 mol% or more of the dicarboxylic acid component is made of terephthalic acid and 90 mol% of the diol component is made of ethylene glycol is most preferable.

  The use of polyester monofilament as the wire 11 of the turtle shell material 1 is highly durable and highly water-resistant, so it will hardly deteriorate even if it is installed for a long time or in water or at the bottom of the water. In addition, there is an advantage that it has rigidity and high shape retention when it is used as a netting material.

  Although the thickness of the wire 11 is not specifically limited, For example, the thing of cross-sectional diameter 2.0mm-4.0mm is applicable.

  The mesh 12 is a substantially hexagonal portion in a plan view formed by twisting the wire 11 and knitting the mesh. A substantially hexagonal mesh 12 is formed by the six sides of the two twisted portions 13, 13 that are the joining portions of the wire 11 and the four legs 14, 14, 14, 14 formed on each of the upper and lower sides. Is formed.

  In principle, the mesh width (mesh) of the mesh 12 may be a size that can prevent the invading organism C from entering the safe growth area R, and can be appropriately set depending on the purpose and application, and is not particularly limited. In addition, when the protected organism D is an animal, depending on the purpose and application, for example, the mesh width of the mesh 12 is a size that allows the protected organism D to pass through, and is a safe growth area by the harmful organism C. It may be set to a size that can prevent entry into R.

  The twisted portion 13 is a substantially spiral twisted portion where the wires 11 are twisted together, and is a joint portion between the wires 11. A twisted portion 13 is formed by twisting 131, 131, 131 between the wires 11.

  By forming the twisted portion 13, in the turtle shell material 1, in the longitudinal direction X1 that is the direction in which the twisted portion 13 extends and in the width direction X2 that is substantially perpendicular to the longitudinal direction X1 on the plane The bendability is greatly different. That is, when the tortoiseshell mesh material 1 is bent in the longitudinal direction X1, the ridge line when it is bent is formed in a direction substantially perpendicular to the direction in which the twisted portion extends, and the substantially arch-shaped surface from the outside is formed. It exhibits high strength while maintaining appropriate elasticity and cushioning against the applied load. On the other hand, when trying to bend the tortoiseshell mesh material 1 in the width direction X2, a pair of twisted portions (for example, reference numerals 13 ′ and 13 ′) rotate as a rotation axis, and the longitudinal direction X1 (in FIG. 2, A broken line is formed at a line connecting the reference numerals 13 ′ and 13 ′, and it is bent in the width direction in a simple and recoverable manner.

  In the present invention, the tortoiseshell netting material 1 is fixed in a state of being bent so that the longitudinal direction X1 has a substantially curved shape. The strength can be increased while maintaining Furthermore, by bending the tortoiseshell mesh material 1 in the longitudinal direction X1, a horizontal force is generated that is pulled to both ends of the width direction X2, and the twisted portion 13 hardly rotates. The substantially arched shape of the material structure P is easily held more firmly.

  The number of twists of the twisted portion 13 is not particularly limited. For example, it is preferable that three to six twisted portions 131 are formed in the twisted portion 13 by twisting once to half to three times. . By increasing the twisting in the twisting portion 13, the strength and shape retention against a load applied from the outside to the substantially arched surface of the net structure P can be further increased.

  In the present invention, both ends in the longitudinal direction X1 of the turtle shell material 1 are used as fulcrums, and the ridge line when curved is in a direction (width direction X2) substantially perpendicular to the direction in which the twisted portion 13 extends (longitudinal direction X1). As shown in FIG. 1, the substantially flat turtle shell net material 1 ′ is bent in a substantially arch shape in the longitudinal direction X1 (see symbol X3 in FIG. 1). A substantially semi-elliptical cylindrical space is formed on the inside of the turtle shell material 1 bent into a substantially arch shape, that is, between the turtle shell material 1 and the ground surface or the water bottom G.

  By bending the tortoiseshell netting material 1 in a substantially arch shape in the longitudinal direction X1, it is possible to form a netting material structure P having high strength against a load applied from the outside and high shape retention. This is particularly effective in maintaining the strength and shape of the netting structure P for a long period of time, for example, when the biological protection structure A is installed on the bottom of the water where irregular and intermittent loads due to water flow are applied. .

  The degree of bending is not particularly limited as long as the net material structure P is formed in a substantially arch shape.

  Tortoiseshell mesh material 1 is capable of forming and maintaining a substantially arch-shaped state, and can maintain the substantially arch-shaped shape of the mesh structure P even with respect to the load applied from the outside to the substantially arch-shaped surface. As long as it has, it can be used according to the purpose and application, and is not limited narrowly. Such strength of the turtle shell material 1 varies depending on the thickness and material of the wire 11, the number of twists of the twisted portion 13, and the like. For example, the Young calculated by using the tensile strength (breaking strength) in the width direction X2 The turtle shell net material 1 having a maximum coefficient value in the range of 500 to 5,000 MPa is estimated to have the above-described strength, and is applicable to the present invention.

  The fixing means 2 is a member for fixing the turtle shell net material 1 in a bent state. As a method for fixing the turtle shell net material 1 in a bent state, known methods can be widely used, and are not particularly limited. For example, as shown in FIG. 1, a substantially arch shape may be formed and held by fixing both ends in the longitudinal direction X1 of the turtle shell net material 1 with tension members like a tide arch. In this case, known members such as ropes, strings, and ropes can be widely used as the tension members. At that time, in a state where the tortoise shell net material 1 is bent, it is fixed by the fixing means 2, and further, for example, the whole biological protection structure A is fixed to the ground surface / water bottom by a known means such as a pile or an anchor. Also good.

  In addition, for example, as in known means, a fixed member is constructed at the fixed part at both ends, like a fixed arch, and the two ends of the turtle shell net 1 bent to each other are rigidly fixed, or like a hinge arch. Alternatively, hinge supports may be installed at the fixed portions at both ends, and both ends of the turtle shell net 1 bent may be fixed respectively.

  In addition, for example, after placing a bulky member between the net material structure P and the ground surface or the water bottom G, and fixing the bulky member to the ground surface or the water bottom G, the net material structure P is You may make it become the structure fixed on the bulky member. In that case, for example, the internal region can be made a part of the safe growth area R by forming the bulking member into a substantially cylindrical shape with the vertical direction opened. Further, depending on the purpose and application, the bulky member may be formed so that the protected organism D can pass through.

  The closing member 3 is a member that closes the substantially semi-elliptical opening portions formed at both ends in the width direction X2 by bending the turtle shell net material 1. In FIG. 1, a part of the closing member 3 is schematically shown. By substantially closing the substantially semi-elliptical opening portions formed on both ends of the width direction X2 by bending the tortoise shell net material 1 by the closing member 3, the tortoise shell net material 1 bent in a substantially arch shape is obtained. The inner semi-elliptical cylindrical space can be substantially isolated from the outside E, and the infestation organism C can be prevented from entering the safe growth area R.

  The closing member 3 may be any member as long as it can prevent the invading organism C from entering the safe growth area R from the substantially semi-elliptical openings, and the material thereof is not particularly limited. For example, the same material as the turtle shell material 1 may be employed, or other substantially flat members may be used. For example, the closing member 3 may be fastened and fixed to both ends in the width direction X2 of the turtle shell net material 1 to close the opening portion so that the invading organism C cannot enter.

  As described above, the mesh structure P is a substantially arch-shaped structure in which the tortoiseshell mesh material 1 is fixed in a bent state so that the longitudinal direction X1 is substantially curved. It has an elliptic cylindrical shape, and has a substantially semi-elliptical cylindrical space between the turtle shell material 1 and the ground surface or the water bottom G. By forming the mesh structure P with the turtle shell material 1, air and water flow can freely pass through the mesh 12, and when the protected organism D is an animal, it depends on the purpose and application. In principle, it can pass freely between the outside E and the safe growing area R through the mesh 12. On the other hand, by setting the mesh width of the mesh 12 to a size that can prevent the invading organism C from entering the safe growing area R, it is possible to effectively prevent the feeding damage by the infecting organism C on the safe growing area R protected organism D. .

  The net structure P according to the present invention is a configuration that does not use the closing member 3, for example, after fixing the turtle shell net 1 in a bent state to form a substantially arch-shaped net structure P, The outer shape of the tortoiseshell mesh material 1 is further bent at both ends in the width direction X2 so that the final appearance shape becomes a substantially dome shape, etc., thereby forming a substantially semi-elliptical opening formed at both ends in the width direction X2 The case where the part is a substantially closed configuration is also widely included.

  The safe growing area R is an area separated from the outside E by the net structure P. Since the net structure P prevents the invading organism C from entering, the protected organism D growing in the safe growth area R is protected from feeding the infesting organism C.

  The safe growth area R is a substantially semi-elliptical cylindrical space between the turtle shell net material 1 and the ground surface or water bottom G inside the turtle shell net material 1 bent into a substantially arch shape, and the ground surface or It includes both the surface layer of the bottom G and the range where the protected organism D or a part thereof can exist.

  The installation location of the netting structure P or the biological protection structure A according to the present invention can be appropriately determined according to the purpose and application, and is not particularly limited. For example, when used for protection of the protected organism D, it may be appropriately determined according to the type of the harm organism C and the protected organism D, the purpose of controlling the food damage, and the like.

  When the biological protection structure A is installed on the ground, for example, it can be applied to the control of food damage of cultivated plants by deer, wild boar and the like.

  For example, when the protected organism D is a cultivated plant, the cultivated plant can be obtained by cultivating the plant in the safe growth area R or by installing the netting structure P so as to cover the area where the plant is cultivated. Is separated from the outside E by the net structure P, and can effectively control the damage of cultivated plants. At that time, the net structure P is formed of the turtle shell net 1, and light, air, water, etc. can pass through the net 12 and are not blocked, whereas destructive organisms C such as deer and wild boar are The material structure P prevents entry into the safe growth area R. In addition, since the tortoiseshell mesh material 1 is fixed in a state where the longitudinal direction X1 is bent so as to be substantially curved, even when deer, wild boar, etc. apply a load to the mesh material structure P from the outside. The shape can be maintained while maintaining appropriate elasticity and cushioning properties.

  On the other hand, when the biological protection structure A is installed at the bottom of the water, for example, (1) prevention of damage to submarine bivalve shells such as clams by means of naruto ray, black sea bream, mussels, etc. It can be applied to (3) coral damage control by sea starfish, (4) seaweed damage control by fish, shrimp, sea urchin, etc.

  For example, when the protected organism D is a submarine bivalve, the submarine bivalve in the safe growth area R can be obtained by installing the bioprotection structure A on the bottom of a shallow water such as an intertidal zone. It is separated from the external E by P, and can effectively control the damage caused by Naruto Bei, Kurodai and Tsumetagiai. At that time, by forming the net structure P with the turtle shell material 1, the water flow can pass through the mesh 12, and the submarine bivalve of the protected organism D can freely travel inside and outside the biological protection structure A. . On the other hand, harmful organisms C such as naruto ray, black sea bream, and mussels are prevented from entering the safe growth area R by the net structure P. In addition, for example, in order to fix the highly durable and water-resistant turtle shell net material 1 in a state of being bent so that the longitudinal direction X1 is substantially curved, the harmful organism C is against the net material structure P. Even when a load is applied from the outside, or when it is installed in a place where irregular and intermittent loads due to water flow are applied to the network structure P, it can retain its shape while maintaining appropriate elasticity and cushioning properties. .

  For example, if the protected organism D is fish such as sweetfish and eel, especially fish that have been released or cultivated, evacuate within the safe growth area R by installing the biological protection structure A at the bottom of the growth area. The fish is separated from the outside E by the net structure P, and can effectively control the damage caused by birds such as cormorants. At that time, by forming the net structure P with the turtle shell net 1, the water flow can pass through the mesh 12, and the fish of the protected organism D can freely travel inside and outside the organism protective structure A. On the other hand, harmful organisms C such as cormorants are prevented from entering the safe growth area R by the net structure P. In addition, for example, in order to fix the highly durable and water-resistant turtle shell net material 1 in a state of being bent so that the longitudinal direction X1 is substantially curved, the harmful organism C is against the net material structure P. Even when a load is applied from the outside, or when it is installed in a place where irregular and intermittent loads due to water flow are applied to the network structure P, it can retain its shape while maintaining appropriate elasticity and cushioning properties. .

  For example, when the protected organism D is a coral, the coral in the safe growth area R is externally separated by the net structure P by installing the biological protection structure A so as to cover the coral at the bottom of the growth area. It is separated from E and can effectively control the damage caused by the sea urchin starfish. At this time, the water flow can pass through the mesh 12 by forming the mesh structure P with the tortoiseshell mesh material 1. On the other hand, the perpetrator C such as the starfish is prevented from entering the safe growth area R by the net structure P. In addition, for example, in order to fix the highly durable and water-resistant turtle shell net material 1 in a state of being bent so that the longitudinal direction X1 is substantially curved, the harmful organism C is against the net material structure P. Even when a load is applied from the outside, or when it is installed in a place where irregular and intermittent loads due to water flow are applied to the network structure P, it can retain its shape while maintaining appropriate elasticity and cushioning properties. .

  For example, when the protected organism D is a seaweed, the seaweed in the safe growth area R can be obtained by installing the biological protection structure A on the bottom of the growth area or covering the seaweed to be cultivated. It is separated from the outside E by the net structure P, and can effectively control food damage such as fish, shrimp, sea urchins such as sea bream, sea bream and black sea bream. At this time, the water flow can pass through the mesh 12 by forming the mesh structure P with the tortoiseshell mesh material 1. On the other hand, the harmful organism C is prevented from entering the safe growth area R by the net structure P. In addition, for example, in order to fix the highly durable and water-resistant turtle shell net material 1 in a state of being bent so that the longitudinal direction X1 is substantially curved, the harmful organism C is against the net material structure P. Even when a load is applied from the outside, or when it is installed in a place where irregular and intermittent loads due to water flow are applied to the network structure P, it can retain its shape while maintaining appropriate elasticity and cushioning properties. .

<About the biological protection method according to the present invention>
The present invention is a direction in which a twisted portion formed by twisting is extended in a substantially flat-shaped turtle shell material in which a substantially hexagonal mesh is formed by twisting and knitting a wire having rigidity. By fixing and installing the turtle shell net material in a bent state so that the longitudinal direction is substantially curved, it forms a safe growth area for protected organisms separated from the outside, for controlling food damage. Includes all biological protection methods.

  Including the case where the above-mentioned biological protection structure is used, by fixing and installing the turtle shell material in the longitudinal direction, it is safe for the protected organism inside the turtle shell material bent in an approximately arch shape. A growth area can be formed, and strength and shape retention with respect to a load applied to the substantially arched surface from the outside can be increased.

  Therefore, it is possible to effectively control the damage caused by a wide range of harmful organisms, including when installed on the ground and when installed on the bottom of the water.

<About the fall prevention structure and fall prevention method according to the present invention>
The above-mentioned net material structure can be applied not only to damage prevention but also to fall prevention means for preventing a person from falling into a groove such as a water channel. That is, the present invention is (1) a structure for preventing a person from falling into a groove, and a substantially flat-shaped turtle shell mesh material in which a substantially hexagonal mesh is formed by twisting together a rigid wire. A mesh structure in which the tortoiseshell mesh material is fixed in a bent state so that the longitudinal direction, which is the extending direction of the twisted portion formed by the twisting, is substantially curved. A fall-preventing structure installed so as to cover the groove in a state where the shore is stretched, and (2) a method for preventing a person from falling into the groove, by twisting together a wire rod having rigidity, The tortoiseshell mesh material is bent so that the longitudinal direction, which is the extending direction of the twisted portion formed by the twisting, is substantially curved in the substantially flat-shaped tortoiseshell mesh material in which the substantially hexagonal mesh is formed. In a state where it is fixed in a state where both sides of the groove are spanned, Broadly encompasses fall prevention method of installing so as to cover the Kimizo.

  By fixing the above-mentioned turtle shell net material in a state of being bent so that the longitudinal direction is substantially curved, it retains moderate elasticity and cushioning against the load applied from the outside to the substantially arched surface. However, the strength can be increased. Therefore, for example, even when a person is likely to fall into a groove such as a river or waterway, the groove is covered with a substantially arch-shaped net structure, and the net structure is suitable. While retaining elasticity and cushioning properties, it has sufficient strength to retain its shape even when a person's weight is applied as a load, so that it is possible to effectively prevent a person from falling.

  The material of the turtle shell material, the degree of bending, etc. are the same as above. Further, as described above, well-known means can be widely adopted as means for fixing the turtle shell net material in a bent state and means for installing / fixing the net material structure in a state where both sides of the groove are bridged.

The external appearance schematic perspective view which shows the example of the biological protection structure which concerns on this invention. The plane schematic diagram which shows the example of the tortoiseshell net | network material applicable to this invention.

1 Turtle shell material
11 Wire rod
12 mesh
13 Twist part
131 Twisting
2 Fixing means
3 Closing member
A biological protection structure
C harmful organisms
D Protected organism
E External
P Net structure
R Safe growth area
X1 Longitudinal direction
X2 width direction

Claims (7)

In a substantially flat turtle shell mesh material in which a substantially hexagonal mesh is formed by twisting together a wire having rigidity, a longitudinal direction that is an extension direction of the twisted portion formed by the twisting is substantially A net structure that is fixed in a state where the turtle shell net is bent so as to have a curved shape,
A safe growth area of protected organisms separated from the outside by the net structure,
Biological protection structure for food damage control.   2. The biological protection structure according to claim 1, wherein 3 to 6 twists are formed in the twisted portion.   3. The bioprotective structure according to claim 1, wherein the wire is a polyester monofilament.   The biological protection structure according to any one of claims 1 to 3, wherein the biological protection structure is installed at the bottom of the water.   The aquatic organism protection structure according to any one of claims 1 to 4, wherein the protected organism is a submarine bivalve.   In a substantially flat turtle shell mesh material in which a substantially hexagonal mesh is formed by twisting together a wire having rigidity, a longitudinal direction that is an extension direction of the twisted portion formed by the twisting is substantially A mesh material structure in which the turtle shell mesh material is bent and fixed so as to have a curved shape.   In a substantially flat turtle shell mesh material in which a substantially hexagonal mesh is formed by twisting together a wire having rigidity, a longitudinal direction that is an extension direction of the twisted portion formed by the twisting is substantially A biological protection method for controlling food damage, wherein the turtle shell net is fixed and installed in a bent state so as to form a curved shape, thereby forming a safe growth area for protected organisms separated from the outside.

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