JP6631966B2 - Pollution prevention membrane with protective net - Google Patents

Description

  The present invention relates to a pollution control membrane installed in seawater in order to prevent diffusion of pollution generated in, for example, waterside, rivers, oceans, and the like.In particular, a water-permeable protection net is provided on the membrane surface side of the pollution control membrane. The present invention relates to an anti-pollution film with a protective net, which is attached so as to prevent contamination and the like from adhering to the surface of the anti-pollution film.

  The pollution prevention film is installed in seawater in order to prevent the diffusion of pollution generated in construction of a waterside, a river, an ocean, or the like. The anti-pollution membrane has a water-permeability function that does not allow the permeation of the contaminants but allows the permeation of fresh water or seawater, thereby preventing the diffusion of the contaminants. The reason why the anti-pollution membrane has water permeability is that if there is no water permeation, fresh water or seawater will rot inside the anti-pollution membrane and adversely affect the environment. Also, in the ocean where the anti-pollution membrane is installed, the ebb and flow phenomenon always occurs.If the anti-pollution membrane does not have water permeability, a water level difference occurs inside and outside of the anti-pollution membrane. This is because water pressure acts on the surface and the water pressure breaks the pollution prevention film.

JP 2013-245532 JP 2014-95231A

By the way, when the anti-pollution film is damaged during the construction period, the work must be interrupted and the entire anti-pollution film must be removed and repaired every time. This is a time consuming, expensive and significant problem. In addition, such accidents may cause pollution damage, which is a great environmental risk.
Further, since the anti-pollution membrane has water permeability, there is a problem that the impure soil which cannot pass through the membrane during the water permeation easily adheres to the membrane surface. Then, when the pollution adheres to the membrane surface, the water permeability inside and outside of the pollution prevention membrane decreases, and various problems such as the above-mentioned damage to the pollution prevention membrane and adversely affecting the environment inside the pollution prevention membrane occur. Occurs. In this case, it is possible to clean the membrane surface near the seawater surface, but it is troublesome and requires time and cost each time. Further, when the water depth becomes deeper, it is not easy to clean the membrane surface, and the cost is higher. There are also problems such as becoming expensive.

  The present invention has been made in view of the above-described problems, and has been made in order to solve the problems. The purpose of the present invention is to attach a water-permeable protective net to the surface of the anti-pollution membrane. , Through the contact between the membrane surface side and the protective net, it is possible to prevent the contamination and the like from adhering to the film surface of the pollution prevention film, and to prevent damage to the pollution prevention film and decrease in water permeability due to the contamination and the like. An object of the present invention is to provide a pollution prevention film with a protective net that can be prevented.

To achieve the above object, the present invention is Rutotomoni the membrane surface side of the pollution layer that is placed in water fresh water or sea water in order to prevent the spread of contamination attaching a protective net of water-permeable, the contamination prevention film Is made of white, and the protection net is made of black-based means.

According to the antifouling membrane with a protective net according to the present invention, by attaching a water-permeable protective net to the surface of the antifouling membrane, the surface of the membrane frequently contacts the protective net due to the flow of water caused by ebb and flow. I do. Through the contact with the protection net, it is possible to prevent the contamination or the like from adhering to the surface of the pollution prevention film. In addition, it is possible to prevent damage to the anti-contamination film and decrease in water permeability due to the adhesion of the contaminants and the like.
As a result, the pollution control membrane is damaged during the construction period, and the work is interrupted each time, the entire pollution control membrane is removed, and repairs are performed. Can be eliminated. In addition, the present invention has an extremely novel and beneficial effect, such as the inconvenience of adversely affecting the environment inside the anti-pollution film due to the decrease in water permeability of the anti-pollution film.

In addition to the effect of the above (0007), in the invention of claim 1, the pollution prevention film is made of a white system and the protection net is made of a black system, so that the pollution prevention film and the protection net can be securely connected in fresh water or seawater. You can see it.
In addition, in addition to the effect of the above (0007), in the case of claim 2, since the protection net is fixedly mounted on the film surface side of the pollution prevention film, the pollution prevention film surely contacts the protection net. Can be repeated.
In addition, in the case of claim 3 in addition to the effect of the above (0007), since the protection net is attached to both sides of the film surface of the pollution prevention film, it is possible to prevent sludge from adhering to both sides of the pollution prevention film. Can be prevented.
In addition, in the case of claim 4 in addition to the effect of the above (0007), since the protection net is attached to one side of the film surface of the pollution prevention film, it is possible to prevent sludge from adhering to one side of the pollution prevention film. Can be prevented.
In addition, in the case of claim 5, in addition to the effect of the above (0007), since the protection net is attached to the lower side of the pollution prevention film, it is possible to prevent sludge from adhering to the lower side of the pollution prevention film. Can be.
In addition, in addition to the effect of the above (0007), in the case of claim 6, since the lower side of the protection net is formed of the bottom side net which is always in contact with the water bottom or the sea bottom, the bottom side net becomes a resistance and is polluted. The lower end of the prevention film can be prevented from rubbing against the water bottom or the sea bottom.
In addition, in addition to the effect of the above (0007), in the case of claim 7 , since the mesh of the protection net has a turtle-shape, the pollution prevention film that comes into contact with the protection net touches in six linear directions. As a result, the pollutants adhering to the film surface are more easily peeled off.

It is a perspective view at the time of the underwater installation of the pollution prevention film with a protective net which shows Embodiment 1 for implementing this invention. It is a side cross section at the time of underwater installation of the pollution prevention film with a protective net showing Embodiment 1 for carrying out the present invention. It is a perspective view at the time of underwater installation of another pollution prevention film with a protective net showing Embodiment 1 for carrying out the present invention. It is a perspective view at the time of the underwater installation of the pollution prevention film with a protective net which shows Embodiment 2 for implementing this invention. It is a side cross section at the time of underwater installation of the pollution control film with a protective net showing Embodiment 2 for carrying out the present invention. It is a perspective view at the time of underwater installation of another pollution prevention film with a protective net showing Embodiment 2 for carrying out the present invention. It is a perspective view at the time of underwater installation of the pollution prevention film with a protective net which shows Embodiment 3 for implementing this invention. It is a side cross section at the time of underwater installation of the pollution prevention film with a protective net showing Embodiment 3 for carrying out the present invention. It is a perspective view at the time of underwater installation of another pollution prevention film with a protective net showing Embodiment 3 for carrying out the present invention. It is a perspective view at the time of underwater installation so that the pollution prevention film with a protective net in Embodiments 1, 2, and 3 for carrying out this invention may surround a construction water area. FIG. It is a figure which shows the operation | movement in partial expansion of the pollution prevention film with a protective net in Embodiments 1, 2, and 3 for implementing this invention.

Hereinafter, the present invention will be described more specifically based on embodiments for carrying out the invention described in the drawings.
[Embodiment 1]
1 to 3, a pollution prevention film 1 is installed in freshwater or seawater a in order to prevent diffusion of pollution generated in construction of a waterside, river, ocean, or the like. The pollution prevention membrane 1 has a water-permeable function that does not allow the passage of pollution but allows the passage of fresh water or seawater, thereby preventing the diffusion of the pollution. The pollution prevention membrane 1 is suspended via a connecting member 21 on a float 2 floating on the surface b of fresh water or seawater. The color of the anti-pollution film 1 is, for example, white.

  When the ebb and flow are tidal, a force to move them is applied to the pollution prevention film 1 and the float 2. For this reason, the float 2 suspending the pollution prevention film 1 is stretched on an anchor block (not shown) installed on the water floor or the seabed c so that the float 2 suspending the pollution prevention film 1 does not flow due to a tide or the like. It is held through a wire rope 22. In FIG. 2, the upper end side of the wire rope 22 is connected to each holding member 23 attached to the lower side of the connecting member 21. Each holding member 23 is attached to the inside and outside with the contamination prevention film 1 interposed therebetween.

  The protection net 3 is attached to the surface of the anti-pollution membrane 1 installed in fresh water or seawater in order to prevent the diffusion of pollution. In FIGS. 1 and 2, the protection net 3 is attached to both sides of the entire surface of the anti-contamination film 1, but if necessary, only on one side on the side where contamination occurs as shown in FIG. Sometimes attached. The color of the protective net 3 is black in comparison with the white anti-pollution film 1, so that it can be easily recognized in fresh water or seawater a.

  The protection net 3 is non-fixedly attached to the film surface side of the pollution prevention film 1. The protection net 3 is attached to the film surface side of the pollution prevention film 1 in a non-contact state, that is, with a slight gap. Since the anti-pollution film 1 is attached with a gap between the front and rear protection nets 3, the front and rear protection nets 3 are swayed back and forth by the tidal current only at the front and rear protection nets 3, so that the front and rear protection nets 3 can be frequently contacted. I have.

  The protection net 3 is formed of a mesh type having water permeability. The mesh of the protection net 3 shown in FIGS. 1 and 3 has, for example, a tortoiseshell shape, but may have a rhombic shape as shown in FIG. Alternatively, the shape may be a lattice shape. The material of the protection net 3 may be made of resin or metal. In the case of metal, since it is easily rusted in fresh water or seawater a, a material coated with a resin or the like so as not to rust is used.

  The tortoiseshell-shaped protection net 3 shown in FIGS. 1 and 3 is composed of a net formed by knitting a wire made of, for example, a synthetic resin monofilament into a hexagonal tortoiseshell shape. Synthetic resin monofilaments have excellent strength and durability. In particular, it has been proven that it has excellent water resistance because it is used as a net for living cages. Since it is used in rivers and oceans, its rustproof properties are valuable. For the synthetic resin monofilament, for example, polyester having excellent durability and strength is used. The synthetic resin monofilament wire having a diameter of, for example, 2 mm to 5 mm is used.

  Since the mesh of the water-permeable protection net 3 is much larger than the fine mesh of the water-permeable pollution prevention film 1, the protection net 3 is less susceptible to the tidal current, and the degree of shaking due to the tide is reduced by the pollution prevention film 1. Smaller than. Therefore, the anti-pollution film 1 which is strongly affected by the tidal current frequently contacts the surface of the protection net 3 with small shaking, and the contamination attached to the surface of the anti-pollution film 1 at the time of the contact is peeled off each time. Dropped.

  Thereby, it is possible to prevent the contamination from adhering to the surface of the pollution prevention film 1 and lowering the water permeability. In addition, the lump of contaminants and the like is prevented from directly hitting the film surface of the anti-pollution film 1 immediately before by the protection net 3, and the anti-pollution film 1 is prevented from being damaged by the lump of contaminants. I have.

  The protection net 3 has its upper end connected to an upper fixture 31 attached to the upper end of the pollution control film 1. For example, a wire rope is used for the upper attachment 31. The upper attachment 31 made of a wire rope is horizontally attached along the upper end side of the pollution prevention film 1.

  As described above, in FIGS. 1 and 2, the protective net 3 is attached to both sides of the entire surface of the pollution prevention film 1. The vertical protection net 3 attached to both sides of the pollution prevention membrane 1 has the net membrane lower end 32 connected thereto. The net film lower end 32 may be connected using a separate linear member, or may be connected by bending the net film lower end 32 of the protection net 3 horizontally as shown in FIG. The lower ends 32 of the connected net films of the protection nets 3 on both sides are in contact with the water bottom or the sea bottom c.

  On the other hand, the anti-pollution film 1 in which both sides of the film surface are sandwiched between the protective nets 3 has its lower end 11 inside the lower end 32 of the net film to which the protective net 3 is connected, that is, the lower end of the net film to which the protective net 3 is connected. 32. That is, the lower end 11 of the anti-pollution membrane 1 is prevented from directly contacting the water bottom or the sea bottom c by the net lower end 32 of the protection net 3, and the lower end 11 of the anti-pollution membrane 1 is directly in contact with the water bottom or the sea bottom c. The contact prevents damage.

Next, the use based on the configuration of the mode for carrying out the invention will be described below.
For example, the float 2 is placed on the water surface b of fresh water or seawater so as to surround a construction area such as a waterside, a river, or the ocean, and floated, and an upper end side of the pollution control film 1 is connected to a connecting member 21 attached to a lower portion of the float 2. Then, the pollution control membrane 1 is installed in the freshwater or seawater a so as to surround the construction area (see FIG. 10).

  A holding member attached to the upper end of the wire rope 22 having its lower end connected to an anchor block (not shown) installed on the water floor or the seabed c with the contamination prevention film 1 interposed therebetween. 23, the pollution control membrane 1 is held in a predetermined freshwater or seawater a in a construction area through a wire rope 22 that is stretched.

  Thereafter, the protection net 3 is attached to both sides of the surface of the anti-pollution film 1 installed in the freshwater or seawater a in a predetermined water area. In order to attach the protection net 3, an upper attachment 31 made of, for example, a wire rope is attached to the upper end side of the pollution prevention film 1 in the width direction thereof. When the protection net 3 is attached to both sides of the anti-pollution film 1, the upper attachments 31 are attached to both sides of the anti-pollution film 1.

  When the protection nets 3 are attached to both sides of the film surface of the anti-pollution film 1, the lower ends 32 of the protection nets 3 on both sides can be connected to each other by using a separate linear member or as shown in FIG. As described above, the lower end 32 of the net film of the protection net 3 may be connected by being bent horizontally. The net membrane lower end 32 of the protection net 3 is attached in contact with the water bottom or the sea bottom c. In any case, the net lower end 32 of the protection net 3 is attached between the lower end 11 of the anti-pollution film 1 and the water bottom or the sea bottom c, so that the lower end 11 of the anti-pollution film 1 is at the bottom of the water or the sea bottom. It is prevented from being damaged by touching c directly.

  As described above, when ebb and flow occurs with the protection nets 3 attached to both sides of the anti-pollution film 1, a tide is generated in any direction toward the surface of the anti-pollution film 1, thus preventing the anti-pollution film. The membrane 1 swings toward the inner and outer surfaces. Tidal currents also act on the protection nets 3 attached to both sides of the pollution prevention film 1. However, since the mesh of the protection net 3 is much larger than the minute meshes of the pollution prevention film 1, the current flows toward the inner and outer surfaces due to the current. The swing is small.

For this reason, as shown in FIG. 11, the film surface of the anti-pollution film 1 which shakes greatly frequently comes into contact with the mesh-like mesh of the protection net 3. The turtle-shaped mesh is formed from a hexagonal line, and in the case of FIGS. 1 and 3, a pair of vertical lines, a pair of diagonally upward lines from the upper end of the vertical line, and a vertical line Are formed from a pair of diagonally downward lines from the lower end of the line, and the film surface of the anti-pollution film 1 which comes into contact with the turtle-shaped mesh is brought into contact with these six-direction lines to form a film surface. The contamination adhering to the surface is easily peeled off. In this way, it is possible to reduce the contamination adhering to the surface of the anti-pollution film 1 and prevent the water permeability of the anti-pollution film 1 from decreasing.

[Embodiment 2]
4 to 6, the pollution prevention film 1 is installed in the freshwater or seawater a in order to prevent the diffusion of the pollution generated in the construction of a waterside, river, ocean, or the like. The pollution prevention membrane 1 has a water-permeable function that does not allow the passage of pollution but allows the passage of fresh water or seawater, thereby preventing the diffusion of the pollution. The pollution prevention membrane 1 is suspended via a connecting member 21 on a float 2 floating on the surface b of fresh water or seawater. The color of the anti-pollution film 1 is, for example, white.

  When the ebb and flow are tidal, a force to move them is applied to the pollution prevention film 1 and the float 2. For this reason, the float 2 suspending the pollution prevention film 1 is stretched on an anchor block (not shown) installed on the water floor or the seabed c so that the float 2 suspending the pollution prevention film 1 does not flow due to a tide or the like. It is held through a wire rope 22. In FIG. 5, the upper end side of the wire rope 22 is connected to each holding member 23 attached to the lower side of the connecting member 21. Each holding member 23 is attached to the inside and outside with the contamination prevention film 1 interposed therebetween.

  The protection net 4 is attached to a lower portion of the surface of the anti-pollution membrane 1 installed in fresh water or seawater to prevent the diffusion of the pollution. The protection net 4 is used when it is not necessary to attach the protection net 1 to the entire surface of the pollution prevention film 1. That is, this is a case where the pollution is likely to occur only on the lower side of the pollution prevention film 1. Alternatively, the upper surface of the anti-pollution film 1 can be easily cleaned from the surface b of fresh water or seawater. In FIGS. 4 and 5, the protection net 4 is attached to the lower portion of both sides of the pollution prevention film 1 on the film surface side. However, as shown in FIG. It may be attached to only one side. The color of the protection net 4 is black in comparison with the white anti-pollution film 1, so that the protection net 4 can be easily recognized in freshwater or seawater a.

  The protection net 4 attached to the lower side of the pollution prevention film 1 is fixedly attached to the film surface side of the pollution prevention film 1. The protection net 4 is attached to the film surface side of the pollution prevention film 1 in a non-contact state, that is, with a slight gap. Since the anti-pollution film 1 is attached with a gap between the front and rear protection nets 4, the front and rear protection nets 4 can be oscillated back and forth by the tide only at the front and rear protection nets, so that the front and rear protection nets 4 can be frequently contacted. I have.

  The protection net 4 attached to the lower side of the pollution prevention membrane 1 is a mesh type having water permeability. The mesh of the protection net 4 shown in FIGS. 4 and 6 has, for example, a turtle-shaped shape, but may have a rhombic shape as shown in FIG. Alternatively, the shape may be a lattice shape. The material of the protection net 4 may be resin or metal. In the case of metal, since it is easily rusted in fresh water or seawater a, a material coated with a resin or the like so as not to rust is used.

  The tortoiseshell-shaped protection net 4 shown in FIGS. 4 and 6 is composed of a net formed by knitting a wire made of, for example, a synthetic resin monofilament into a hexagonal tortoiseshell shape. Synthetic resin monofilaments have excellent strength and durability. In particular, it has been proven that it has excellent water resistance because it is used as a net for living cages. Since it is used in rivers and oceans, its rustproof properties are valuable. For the synthetic resin monofilament, for example, polyester having excellent durability and strength is used. The synthetic resin monofilament wire having a diameter of, for example, 2 mm to 5 mm is used.

  Since the mesh of the water-permeable protection net 4 is much larger than the fine mesh of the water-permeable pollution prevention film 1, the protection net 4 is less susceptible to the tidal current, and the degree of sway caused by the tide is less than that of the pollution prevention film 1. Smaller than. For this reason, the lower part of the anti-pollution film 1 which is strongly affected by the tidal current frequently comes into contact with the surface of the protection net 4 where the shaking is small. Each time, it is peeled and dropped.

  Thereby, it is possible to prevent contamination from adhering to the lower surface of the contamination prevention film 1 and lowering the water permeability. Further, the lump of contaminants and the like is prevented from directly hitting the film surface on the lower side of the anti-pollution membrane 1 immediately before by the protection net 4, and the lower side of the anti-pollution membrane 1 is not damaged by the lump of contaminants. Is prevented.

  The protection net 4 is connected at its upper end to a middle mounting member 41 mounted slightly below the middle of the pollution control film 1. For example, a wire rope is used for the middle fitting 41. The middle attachment 41 made of a wire rope is attached horizontally along a slightly lower side than the middle of the pollution control film 1.

  As described above, in FIGS. 4 and 5, the protective net 4 is attached to both lower surfaces of the pollution prevention film 1. The vertical protection net 4 attached to both lower sides of the pollution prevention membrane 1 has a net membrane lower end 42 connected thereto. The connection of the net film lower ends 42 may be performed by using a separate linear member, or may be connected by bending the net film lower ends 42 of the protection nets 4 in a horizontal direction as shown in FIG. The lower ends 42 of the connected net films of the protection nets 4 on both sides are in contact with the water bottom or the sea bottom c.

  On the other hand, the anti-pollution membrane 1 in which both sides on the lower side of the membrane surface are sandwiched by the protective net 4 has its membrane lower end 11 inside the net membrane lower end 42 to which the protective net 4 is connected, that is, the protection net 4 is connected. It is on the lower end 42 of the net film. That is, the lower end 11 of the anti-pollution membrane 1 is prevented from directly contacting the water bottom or the sea bottom c by the net lower end 42 of the protection net 4, and the lower end 11 of the anti-pollution membrane 1 is directly in contact with the water bottom or the sea bottom c. The contact prevents damage.

Next, the use based on the configuration of the mode for carrying out the invention will be described below.
For example, the float 2 is placed on the water surface b of fresh water or seawater so as to surround a construction area such as a waterside, a river, or the ocean, and floated, and an upper end side of the pollution control film 1 is connected to a connecting member 21 attached to a lower portion of the float 2. Then, the pollution control membrane 1 is installed in the freshwater or seawater a so as to surround the construction area (see FIG. 10).

  A holding member attached to the upper end of the wire rope 22 having its lower end connected to an anchor block (not shown) installed on the water floor or the seabed c with the contamination prevention film 1 interposed therebetween. 23, the pollution control membrane 1 is held in a predetermined freshwater or seawater a in a construction area through a wire rope 22 that is stretched.

  After that, the protection net 4 is attached to both sides of the lower surface side of the pollution prevention film 1 installed in the freshwater or seawater a in a predetermined water area. In order to attach the protection net 4, a middle attachment 41 made of, for example, a wire rope is attached to the width direction of the contamination prevention film 1 slightly below the middle of the film. When the protection net 4 is attached to both sides of the anti-pollution film 1, the middle attachment 41 is attached to both sides of the anti-pollution film 1.

  When the protection nets 4 are attached to both lower sides of the surface of the pollution prevention membrane 1, the lower ends 42 of the protection nets 4 on both sides can be connected to each other using a separate linear member. As shown in FIG. 5, the lower end 42 of the net film of the protection net 4 may be connected by being bent horizontally. The net membrane lower end 42 of the protection net 4 is attached in contact with the water bottom or the sea bottom c. In any case, by attaching the net membrane lower end 42 of the protection net 4 between the membrane lower end 11 of the pollution control membrane 1 and the water bottom or the sea bottom c, the membrane lower end 11 of the pollution prevention membrane 1 becomes the water bottom or the sea bottom. It is prevented from being damaged by touching c directly.

  As described above, when ebb and flow occurs in a state where the protection net 4 is attached to both lower surfaces of the pollution prevention film 1, a tide is generated in any direction toward the film surface of the pollution prevention film 1. The anti-pollution film 1 swings toward the inner and outer surfaces. The tidal current also acts on the protection net 4 attached to both lower sides of the pollution prevention film 1. However, since the mesh of the protection net 4 is much larger than the fine mesh of the pollution prevention film 1, The swing to the outer side is small.

For this reason, as shown in FIG. 11, the lower surface of the anti-pollution film 1 that frequently shakes frequently comes into contact with the tortoise-shaped mesh of the protection net 4. The turtle-shaped mesh is formed from a hexagonal linear shape. In the case of FIGS. 4 and 6, a pair of vertical linear shapes, a pair of diagonally upward linear shapes from the upper ends of the vertical linear shapes, and a vertical Are formed from a pair of diagonally downward lines from the lower end of the line, and the lower film surface of the anti-pollution film 1 that comes into contact with the turtle-shaped mesh is contacted with the lines in these six directions. Contamination adhering to the film surface on the lower side is easily peeled off. In this way, it is possible to remove the contaminants adhering to the film surface on the lower side of the anti-pollution film 1 and prevent the water permeability of the lower side of the anti-pollution film 1 from decreasing.

[Embodiment 3]
7 to 9, the pollution prevention film 1 is installed in freshwater or seawater a in order to prevent diffusion of pollution generated in construction of a waterside, river, ocean, or the like. The pollution prevention membrane 1 has a water-permeable function that does not allow the passage of pollution but allows the passage of fresh water or seawater, thereby preventing the diffusion of the pollution. The pollution prevention membrane 1 is suspended via a connecting member 21 on a float 2 floating on the surface b of fresh water or seawater. The color of the anti-pollution film 1 is, for example, white.

  When the ebb and flow are tidal, a force to move them is applied to the pollution prevention film 1 and the float 2. For this reason, the float 2 suspending the pollution prevention film 1 is stretched on an anchor block (not shown) installed on the water floor or the seabed c so that the float 2 suspending the pollution prevention film 1 does not flow due to a tide or the like. It is held through a wire rope 22. In FIG. 8, the upper end side of the wire rope 22 is connected to each holding member 23 attached to the lower side of the connecting member 21. Each holding member 23 is attached to the inside and outside with the contamination prevention film 1 interposed therebetween.

  The protection net 5 is attached to the lower part of the surface of the pollution control membrane 1 that is installed in fresh water or seawater to prevent the diffusion of the pollution. The lower side is bent so as to be in contact with the surface of the water bottom or the sea bottom c. As in the case of the second embodiment, the protection net 5 is used when it is not necessary to attach the protection net 5 to the entire surface of the pollution prevention film 1. That is, this is a case where the pollution is likely to occur only on the lower side of the pollution prevention film 1. Alternatively, the upper surface of the anti-pollution film 1 can be easily cleaned from the surface b of fresh water or seawater. In FIGS. 7 and 8, the protection net 5 is attached to the lower part of both sides on the film surface side of the pollution prevention film 1, but if necessary, as shown in FIG. It may be attached to only one side. The color of the protection net 5 is black in comparison with the white anti-pollution film 1, and is easy to be visually recognized in the freshwater or seawater a.

  The protection net 5 attached to the lower side of the contamination prevention film 1 is fixedly attached to the film surface side of the contamination prevention film 1. The protection net 5 is attached to the film surface side of the pollution prevention film 1 in a non-contact state, that is, with a slight gap. Since the pollution prevention film 1 is attached with a gap between the front and rear protection nets 5, only the gap between the front and rear protection nets 5 swings back and forth due to the tide and can frequently contact the front and rear protection nets 5. I have.

  The protection net 5 attached to the lower side of the pollution prevention membrane 1 is formed of a mesh type having water permeability. The mesh shape of the protection net 5 shown in FIGS. 7 and 9 is, for example, a tortoiseshell shape, but may be a rhombus shape as shown in FIG. Alternatively, the shape may be a lattice shape. The material of the protection net 5 may be resin or metal. In the case of metal, since it is easily rusted in fresh water or seawater a, a material coated with a resin or the like so as not to rust is used.

  The tortoiseshell-shaped protection net 5 shown in FIGS. 7 and 9 is composed of a net formed by knitting a wire made of, for example, a synthetic resin monofilament into a hexagonal tortoiseshell shape. Synthetic resin monofilaments have excellent strength and durability. In particular, it has been proven that it has excellent water resistance because it is used as a net for living cages. Since it is used in rivers and oceans, its rustproof properties are valuable. For the synthetic resin monofilament, for example, polyester having excellent durability and strength is used. The synthetic resin monofilament wire having a diameter of, for example, 2 mm to 5 mm is used.

  Since the mesh of the water-permeable protection net 5 is much larger than the fine mesh of the water-permeable pollution prevention film 1, the protection net 5 is hardly affected by the tidal current, and the degree of shaking due to the tide is reduced by the pollution prevention film 1. Smaller than. For this reason, the lower part of the anti-pollution film 1 which is strongly affected by the tidal current frequently comes into contact with the surface of the protection net 5 where the shaking is small, and the contamination adhered to the lower surface of the anti-pollution film 1 at the time of the contact. Each time, it is peeled and dropped.

  Thereby, it is possible to prevent contamination from adhering to the lower surface of the contamination prevention film 1 and lowering the water permeability. Further, the lump of contaminants and the like is prevented from directly hitting the film surface on the lower side of the anti-pollution membrane 1 immediately before by the protection net 5, and the lower side of the anti-pollution membrane 1 is not damaged by the lump of contaminants. Is prevented.

  The protection net 5 is connected at its upper end to a middle mounting member 51 mounted slightly below the middle of the pollution control film 1. For example, a wire rope is used for the middle attachment 51. The middle mounting member 51 made of a wire rope is horizontally mounted along a slightly lower side than the middle of the pollution prevention film 1.

  As described above, in FIGS. 7 and 8, the protection net 4 is attached to both lower surfaces of the pollution prevention film 1. The vertical protection nets 5 attached to both lower sides of the pollution control membrane 1 are bent at their lower sides toward the opposite sides of the pollution control membrane 1 to become bottom nets 52 which are in contact with the water bottom or the sea bottom c. ing.

  The lower side of the anti-pollution membrane 1 is attached to the lower side of the anti-pollution membrane 1 by the protection net 5 having the bottom side net 52 attached thereto, so that the lower-side net 52 of the protection net 5 is always in contact with the water bottom or the seabed c. The side is prevented from shaking. This prevents the lower end 11 of the pollution prevention film 1 from swaying and rubbing against the water bottom or the sea bottom c, thereby preventing damage. In FIG. 9, the protection net 5 having the bottom net 52 is attached to one side of the pollution prevention film 1.

Next, the use based on the configuration of the mode for carrying out the invention will be described below.
For example, the float 2 is placed on the water surface b of fresh water or seawater so as to surround a construction area such as a waterside, a river, or the ocean, and floated, and an upper end side of the pollution control film 1 is connected to a connecting member 21 attached to a lower portion of the float 2. Then, the pollution control membrane 1 is installed in the freshwater or seawater a so as to surround the construction area (see FIG. 10).

  A holding member attached to the upper end of the wire rope 22 having its lower end connected to an anchor block (not shown) installed on the water floor or the seabed c with the contamination prevention film 1 interposed therebetween. 23, the pollution control membrane 1 is held in a predetermined freshwater or seawater a in a construction area through a wire rope 22 that is stretched.

  Thereafter, the protection net 5 is attached to both sides of the lower surface side of the pollution prevention film 1 installed in the freshwater or seawater a in a predetermined water area. In order to attach the protection net 5, a middle attachment 51 made of, for example, a wire rope is attached to the width direction of the contamination prevention film 1 slightly below the middle. When the protection net 5 is attached to both sides of the anti-pollution film 1, the middle attachment 51 is attached to both sides of the anti-pollution film 1.

  When the protection net 5 is attached to both sides of the lower surface of the pollution prevention membrane 1, the bottom net 52 on the lower side of the protection net 5 is bent at a right angle and attached to the water bottom or the sea bottom c. In any case, by attaching the bottom side net 52 of the protection net 5 between the film lower end 11 of the pollution prevention film 1 and the water bottom or the sea bottom c, the lower side of the pollution prevention film 1 can be prevented from shaking. Therefore, the lower end 11 of the anti-pollution film 1 is prevented from swaying and rubbing against the water bottom or the sea bottom c, and is prevented from being damaged.

  As described above, when ebb and flow occurs in a state where the protection nets 5 are attached to both lower surfaces of the pollution prevention film 1, a tide flows in any direction toward the film surface of the pollution prevention film 1. The anti-pollution film 1 swings toward the inner and outer surfaces. The tidal current also acts on the protection net 5 attached to both lower sides of the pollution prevention film 1. However, since the mesh of the protection net 5 is much larger than the fine mesh of the pollution prevention film 1, The swing to the outer side is small.

  Therefore, as shown in FIG. 11, the lower surface of the anti-pollution film 1 frequently contacts the turtle-shaped mesh of the protection net 5. The turtle-shaped mesh is formed from a hexagonal linear shape. In the case of FIGS. 7 and 9, a pair of vertical linear shapes, a pair of diagonally upward linear shapes from the upper ends of the vertical linear shapes, and a vertical Are formed from a pair of diagonally downward lines from the lower end of the line, and the lower film surface of the anti-pollution film 1 that comes into contact with the turtle-shaped mesh is contacted with the lines in these six directions. Contamination adhering to the film surface on the lower side is easily peeled off. In this way, it is possible to remove the contaminants adhering to the film surface on the lower side of the anti-pollution film 1 and prevent the water permeability of the lower side of the anti-pollution film 1 from decreasing.

  It should be noted that the present invention is not limited to the embodiment for carrying out the present invention, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Pollution prevention film 11 Membrane lower end 2 Float 21 Connecting material 22 Wire rope 23 Holding member 3 Protective net 31 Upper fixture 32 Net lower end 4 Protective net 41 Middle fixture 42 Net lower end 5 Protective net 51 Middle fixture 52 Bottom net a Freshwater or seawater underwater b Freshwater or seawater surface c Water bottom or seabed

Claims (7)

Rutotomoni on the film surface side of the pollution layer that is placed in water fresh water or sea water in order to prevent the spread of contamination attaching a protective net of water-permeable, the contamination prevention film is made of white, the protective net is a blackish An anti-pollution membrane with a protective net. The antifouling membrane with a protective net according to claim 1, wherein the protective net is fixedly attached to the surface of the antifouling membrane. The antifouling film with a protective net according to claim 1 or 2, wherein the protective net is attached to both sides of the surface of the antifouling film. The antifouling film with a protective net according to claim 1 or 2, wherein the protective net is attached to one of the surfaces of the antifouling film. The pollution prevention film with a protection net according to any one of claims 1 to 4, wherein the protection net is attached to a lower side of the pollution prevention film. The antifouling membrane with a protective net according to any one of claims 1 to 5, wherein the lower side of the protective net comprises a bottom net which is bent and constantly in contact with a water bottom or a seabed. The pollution prevention membrane with a protective net according to any one of claims 1 to 6 , wherein the mesh of the protective net has a tortoiseshell shape.

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