JPH1175589A - Vegetated floating island - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an artificial floating island capable of setting to free shape and carrying out vegetation. SOLUTION: Surface woven fabric and rear fabric obtained by weaving warp with weft in a prescribed scale of mesh are connected at a prescribed space by connecting yarns two-dimensionally, longitudinally and latitudinally arranged and having a prescribed length to form a bag body. A vegetation substrate obtained by forming a vegetable fiber in chip-like shape is poured into the interior of the bag body under pressure to provide a mat-like bag body 3. The mat-like bag body 3 is made to float on water surface of livers, lakes and marshes, pond and aquatic plants 2 are planted on surface woven fabric at a prescribed interval.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating vegetation island, and more particularly to a mat-shaped floating vegetation island having a water purification function and a buoyancy that can be set to any shape.

[0002]

2. Description of the Related Art Natural floating islands full of aquatic plants are distributed on shores such as rivers and lakes. In many of these floating islands, withered aquatic plants and the like have accumulated for many years, and have come to constitute a buoyant vegetation base. For this reason, it takes a long time to artificially deposit aquatic plants to create a floating island having a vegetation base or to regenerate a once destroyed floating island in a natural state. It is also known that aquatic plants distributed on natural floating islands contribute to water purification of lakes and ponds. For example, the roots of aquatic plants distributed on a floating island grow so as to vertically penetrate the floating island as a vegetation base, and the tip spreads in the water. In addition to absorbing water from the roots, it also grows by taking in nitrogen and phosphorus in the water as nutrients. As a result, the nitrogen concentration and the phosphorus content in the water are reduced, and eutrophication of the lake ponds can be prevented.

As described above, there are many demands for distributing floating islands in lakes and the like, and forming artificial floating islands in the lakes and lakes for the purpose of plant growth, landscape protection and water purification. The applicant has already proposed an artificial floating island 50 as shown in FIG. The artificial floating island 50 is provided with a float mounted on a square frame-shaped steel frame 51, a net on the upper and lower surfaces of the steel frame 51, and a vegetation base 52 made of a urethane foam resin plate in a portion surrounded by the net. A water plant 53 such as reed is vegetated at predetermined intervals on a vegetation base 52 and is floated on a lake or pond. Further, as shown in the figure, a plurality of steel frames 51 can be flexibly connected at joints (not shown) to construct an artificial floating island having a certain area of flexibility and a large area. The artificial floating island 50 is supported by an anchor block at the bottom of the water by an anchor rope (not shown). Aquatic plants 5
Immediately after planting 3, the shape of the steel frame 51 appears as shown, but when it grows thicker, the frame 51 is covered with aquatic plants 53.

[0004]

By the way, the artificial floating island 50 shown in FIG. 8 has a square-based shape as a whole even if the aquatic plants 53 grow and become covered with overgrown plants. It cannot be changed, leaving unnaturalness in harmony with the surroundings. In order to eliminate this unnaturalness, a frame whose outer shape is finished in a curved shape is manufactured,
It is possible to provide a cover that covers the frame, but it is cumbersome to process and increases the production cost. FIG.
In the artificial floating island 50 shown in (1), urethane foam is used as the vegetation base 52, a cut is provided in the surface of the urethane foam resin plate, and a root of the foamed urethane foam is inserted in order to implant a seedling of an aquatic plant in the cut portion. To reach the lower surface of the vegetation base 52, and it is difficult to ensure that the roots survive on the vegetation base.

Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a high flexibility as a whole.
An object of the present invention is to provide a vegetation floating island having a vegetation base which can be easily formed into an arbitrary planar shape, easily grows vegetated aquatic plants, and is expected to have a water purification effect.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a predetermined woven fabric comprising a front woven fabric and a back woven fabric in which warp yarns and weft yarns are woven in a predetermined pattern. A mat-shaped bag made by injecting at least a vegetative base material made of plant fibers into a chip by pressurizing a vegetation base material into a bag body by connecting at predetermined intervals with a binding yarn having a length, into a river or lake pond. And water plants are vegetated on the surface woven fabric surface at predetermined intervals.

At this time, the vegetation base material is preferably a chip material obtained by shortening coconut fibers. Further, it is preferable that the mat-like bag is mixed with a particulate buoyant body or coal ash fired particles in addition to the vegetation base material.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a floating vegetation island of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic perspective view showing a state in which aquatic plants 2 are planted at predetermined intervals on the surface of a vegetation floating island of the present invention. This vegetation floating island 1
The inside of the mat-shaped bag body 3 constituting the outer shape portion is filled with a granular base material 6 in which a vegetation base material 4 and a granular buoyant body 5 are mixed at a sufficient density. FIG. 2 is a partial schematic perspective view showing a state where the granular base material 6 is filled in the mat-like bag body 3. As shown in FIG. 2, the mat-like bag 3 is
0 and the back woven fabric 20 are connected so that a predetermined thickness is secured by binding yarns 15 provided at predetermined vertical and horizontal intervals. The woven fabric constituting the front surface of the mat-like bag 3 is formed by interweaving the warp and weft as shown in FIG. The texture of the front woven fabric 10 and the back woven fabric 20 is both set to 1 to 2 mm. In the present embodiment, polyamide yarn is used for both the warp yarn and the weft yarn, but synthetic fiber yarns such as polyester and polyethylene can also be used. Although the aquatic plants 2 are vegetated at predetermined intervals over the entire surface of the mat-like bag 3, some of the plants are not shown for simplification of the drawing.

The thickness of the mat-like bag can be set to an average thickness of about 10 cm to 50 cm depending on the length of the binding yarn 15. It is also preferable to set the vertical and horizontal spacing of the binding yarns 15 in accordance with the thickness of the mat-like bag so that the ratio becomes appropriate. As the material of the binding yarn 15, the same polyamide yarn as the material of the woven yarn is used.

In a factory, a granular base material 6 is filled in a mat-shaped bag body 3 sewn into a predetermined shape, and the mat-shaped bag body 3 is carried to a site as a mat of a predetermined thickness. Among the granular base materials 6, the vegetation base material 4 is made by shortening coconut fibers into fibers,
What is dried and processed into chips is used as a main material. Foamed styrene beads are mixed at a ratio of about 10% by volume as the granular buoyant body 5. The vegetation base material 4 and the granular buoyant body 5 are stirred in advance by a mixer (not shown), supplied to the blower, and supplied to a part of the mat-like bag through a supply hose connected to the blower (not shown). ). When the granular base material 6 is filled in the mat-shaped bag body 3 at a predetermined pressure, the cross-sectional shape of the mat-shaped bag body 3 is convex between the portions connected by the binding yarn 15 as shown in FIG. The cross section has a substantially uniform thickness. In addition, besides the foamed styrene resin, any suitable foamable resin can be used as the particulate buoyant body 5 as appropriate. By changing the mixing ratio, the draft height of the mat-shaped bag body 3 can be appropriately set.

As an example, a band-shaped connecting belt 7 is sewn to the periphery of the mat-shaped bag body 3 sewn in a square shape. The peripheral edge of the mat-shaped bag body 3 is maintained by the thick connecting belt 7. Eyelets 8 are formed in the connection belt 7 at predetermined intervals. The side of the mat-shaped bag 3 can be connected by inserting the connecting rope R into the eyelet hole 6 (see FIGS. 1 and 3).

FIG. 4 is a partial cross-sectional view showing an initial stage of planting the aquatic plant 2 and a state where the aquatic plant 2 has grown to some extent. For example, as the aquatic plant 2, a water-extracted plant such as reed, cattail, and kamamo is suitable. At the time of vegetation, the surface of the mat-like bag 3 is slightly cut, and the root 2 a of the aquatic plant 2 is embedded in the granular base material 6. At this time, the granular base material 6 is in a wet state as a whole by absorbing moisture from the lower surface, and a state suitable for rooting and growth is maintained. FIG. 4 (b) shows a state of growth from the state of FIG. 4 (a). As shown in the figure, the roots 2a protrude from the lower surface of the mat-like bag body 3 and proliferate so as to spread in water. When the root 2a spread in water as described above absorbs moisture, it also absorbs nitrogen and phosphorus and grows.

FIGS. 5 and 6 show an embodiment in which the corresponding sides of the mat-shaped bag 3 are curved in advance in order to construct a vegetation floating island of an arbitrary shape. It is preferable to set the weight per floating vegetation island to about 30 kg due to restrictions on transportation and installation. Therefore, in order to construct a floating island having a certain area, it is necessary to connect a plurality of mat-like bags 3 as shown in FIG. 6, for example. At this time, it is preferable that the connecting portion is linear and the connecting belt 7 is sewn. The other portions, particularly the portions forming the outer shape of the floating island, can have any shape. At this time, the connecting belt 7
It is preferable to sew a relatively strong edge tape 9 having the same specifications as the above. By providing the edge tape 9, it is possible to prevent the mat-shaped bag 3 from being damaged when the vegetation floating island 1 hits a surrounding pile or the like.

The thickness of the mat-like bag 3 shown in FIG. 2 is assumed to be 10 to 15 cm, and a connecting rope R or the like can be used for connecting the respective mat-like bags 3. On the other hand, when the thickness of the bag exceeds 30 cm, a connecting frame 20 partially shown in FIG. 7 is used to maintain the strength of the connecting portion and the stability of the mat-shaped bag 3. Is preferred. The material of the connection frame 20 is preferably made of synthetic resin, corrosion-resistant metal, or the like. The connection frame 20 preferably has upper and lower flanges 21 and 22 for connecting the upper surface and the lower surface of the mat-shaped bag body 3 respectively. It is also preferable to accommodate a buoyant body 25 such as a foamed styrene resin between the upper and lower flanges 21 and 22. At this time, one end of the anchor chain 23 can be connected to the lower flange 22 and the other end can be attached to the anchor block 24 at the bottom of the water.

In the above description, the vegetation base material 4 made of vegetable fiber such as palm is used as the granular base material 6. Further, it is also preferable to use fired coal ash particles exhibiting an effect on water purification as the vegetation base material 4. When the mat-like bag 3 is immersed in water and is exposed to the flow of water, the coal ash fired particles adsorb organic components in the water by physical adsorption to purify the water. In addition, it is also possible to mix and use the granular buoyant bodies 5 at a predetermined mixing ratio for buoyancy adjustment. It is expected that the draft position of the mat-shaped bag body 3 differs depending on the water absorption, weight, and the like of the material filled therein.
Therefore, it is preferable to select a filling material, determine a filling rate, and the like so that an appropriate wet state can be formed according to the aquatic plant to be planted. It should be noted that the types of aquatic plants planted in the mat-shaped bag 3 are not limited to a single variety, and it goes without saying that a plurality of varieties can be mixed and vegetated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a floating vegetation island according to the present invention.

FIG. 2 is a partially enlarged perspective view showing an enlarged partial cross section of the vegetation floating island shown in FIG. 1;

FIG. 3 is a perspective view showing a state where the floating vegetation islands shown in FIG. 1 are connected.

FIG. 4 is a partial cross-sectional view of a mat-like bag showing a growing state of an aquatic plant.

FIG. 5 is a perspective view showing an example of a vegetation floating island having a curved outer shape.

FIG. 6 is an overall plan view showing an example of a vegetation floating island having a curved outer shape.

FIG. 7 is a cross-sectional view showing an embodiment of a vegetation floating island using a thick mat-like bag body.

FIG. 8 is a perspective view showing the entire configuration of a conventional artificial floating island.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vegetation floating island 2 Aquatic plant 3 Mat-shaped bag body 4 Vegetation base material 5 Granular buoyancy body 6 Granular base material 7 Connecting belt 9 Edge tape

Claims (4)

[Claims] 1. A front woven fabric and a back woven fabric in which warp and weft yarns are woven in a predetermined pattern are connected at predetermined intervals by binding yarns of a predetermined length arranged in a horizontal and vertical direction. A mat-shaped bag formed by injecting at least a vegetation base material made of plant fibers into chips into the bag by pressure application is floated on the water surface of a river or a lake, and the surface woven fabric surface is provided at a predetermined interval. A vegetation floating island characterized by vegetation of aquatic plants. 2. The vegetation floating island according to claim 1, wherein said vegetation base material is a chip material obtained by shortening coconut fiber. 3. The mat-like bag body is added to the vegetation base material,
The vegetation floating island according to claim 1 or 2, wherein a granular buoyancy body is mixed. 4. The method according to claim 1, wherein the mat-like bag is added to the vegetation base material.
2. A coal ash fired particle is mixed.
Or the vegetation floating island according to claim 2.