JP2005295835A - Float island unit and vegetation float island - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a float island unit realizing an artificial float island structure obtained by utilizing waste tires 10 in view of recycle of products, on which aquatic plants are planted, which is stably maintained even when the plants grow up, and which matches the surrounding scenery. <P>SOLUTION: The float island unit 2 is structured as follows: forming a foamed buoyant body 12 having joint parts at prescribed positions of its outer periphery around the waste tire 10; providing a vegetation base-housed basket body 11 projecting downward from the bottom surface opening of the waste tire 10 and having a predetermined-mesh opening and a deep-bottomed shape; and charging a vegetation base material 15 into the waste tire 10 and the vegetation base-housed basket 11. The float island units 2 are joined so as to form a prescribed flat shape while planting emergent plants 21 each on the vegetation base material 15, and fixedly set in an installation water area so as to form the vegetation float island 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a floating island unit and a vegetation floating island, and the main structure of the floating island unit connected with waste tires from the viewpoint of product recycling is covered with aquatic plants and maintains a stable structure even when grown. It relates to floating island units that can be made and vegetation floating islands that realize floating island structures that match the surrounding landscape.

  More than 100 million waste tires are generated annually, and a part with less damage is reused as a tire after undergoing a predetermined regeneration operation as a corrected tire. About half of the heat is used as a heat source and a part of the cement raw material in the cement manufacturing process. However, diversion to other uses is required from the viewpoint of reducing carbon dioxide generation. For this reason, various methods of recycling waste tires by mechanical treatment have been implemented. For example, waste tires are cut into tire chips, or crushed to use recycled rubber or rubber powder for various industrial products and materials. However, a processing step is required and the amount of material used in the market is not so large. In addition, there are uses as a slope retaining material, playground equipment, and fenders to use waste tires in their original form (product recycling), but the amount used is also small.

  Therefore, the applicant forms a foam buoyant body having a connecting portion at a predetermined position on the outer edge around the waste tire, and closes one opening of the tire with a mesh material to form the bottom portion in the waste tire. A floating island-shaped unit filled with a vegetation base material is manufactured, a large number of the floating island units are connected, and a vegetation floating island is proposed in which the vegetation base material is vegetated (see Patent Document 1).

  As the water extraction plant that grows on this vegetation floating island, native species that are rooted in the waters of the lake shore such as the lake where the vegetation floating island is installed are often selected, but it is easy to live in the water below the vegetation floating island, Plants that tend to grow leaf stems on the water, such as annual grasses such as reed, macomo and cattail, are often selected.

JP2003-88259A.

  By the way, the above-mentioned extraction plant has a height of 2 m or more when grown. At this time, the waste tire, which is the main structure of floating islands, has a tire width of about 20cm and the filling thickness of the vegetation base material in the floating island unit is thinner than that, so if strong winds or strong wind waves occur, There is a problem that it is difficult to stably hold the root of the plant with the thickness of the base. When a plurality of floating island units are used in combination, tall plants are often planted in the center of the floating islands and moderately short plants are planted around the floating islands in consideration of the landscape of the vegetation floating islands. A similar trouble may occur when a vegetation floating island with such a shape is assumed. In addition, when installed near the shore, there is a demand for planting shrubs of a tree species with deep roots in accordance with the surrounding landscape on the vegetation floating island.

  In addition, wind waves with large amplitude may be generated on the lake surface due to strong winds, etc., causing a phase difference between a plurality of connected floating island units, damaging the connected parts, and vegetation floating islands being divided and destroyed.

  Therefore, the object of the present invention is to solve the above-mentioned problems of the prior art, maintain stability even when a relatively tall aquatic plant grows as a vegetation floating island, and stabilize even in strong winds. It is to provide a floating island unit and a vegetation floating island that can secure the property.

  In order to achieve the above object, the present invention forms a foam buoyant body having a connecting portion at a predetermined position on an outer edge around a waste tire, and further includes a vegetation base accommodating portion protruding downward from a lower surface opening of the waste tire. And the vegetation base material is filled in the waste tire and the vegetation base accommodation part.

  It is preferable that the vegetation base accommodating portion has a shape in which a deep-bottom rod-shaped body or a deep-bottom-shaped frame having a predetermined opening protruding downward from the lower surface opening of the waste tire is covered with a net.

  It is preferable that the waste tires are stacked in multiple stages, and the foamed buoyancy body is formed around the waste tires stacked in multiple stages to improve the stability of the floating island unit.

  The above-mentioned floating island unit is connected to the predetermined planar shape through the connecting portion, and a vegetation floating island is constructed by planting an extraction plant on the vegetation base material and placing it in an installation water area.

  According to the present invention, it is possible to realize a floating island structure that matches a surrounding landscape so that a stable state can be maintained even when a vegetation floating island is swung by a wind wave or a tall aquatic plant grows. Can do.

  Hereinafter, the following embodiments will be described with reference to the accompanying drawings as the best mode for carrying out the floating island unit and the vegetation floating island of the present invention.

  FIG. 1 is a perspective view schematically showing a part of a vegetation floating island formed by connecting a plurality of floating island units. FIG. 2A is a perspective view showing the floating island unit 2. Hereinafter, the configuration of the floating island unit will be described. As shown in the cross section in FIG. 2, the floating island unit 2 has a plane dimension slightly larger than the diameter of the tire so that the side length of one side is slightly spaced from the outer circumference of the waste tire 10. And a foamed buoyant body 12 foamed in a substantially regular hexagonal shape, and a substantially cylindrical shape having a predetermined lower depth and a slightly lower diameter so as to close the lower surface opening of the waste tire 10 placed horizontally. A base material storage basket 11 as a vegetation base storage part and a connecting jig 14 for connecting the units 2 are formed, and the vegetation base material 15 is filled in the waste tire 10 and the base material basket.

  In the present specification, the waste tire 10 is a tire that is used as a vehicle tire, for example, a tire that is not suitable for riding due to wear of a tread pattern and discarded, and has been recycled with the intention of using the original form (product recycling). Say things. The waste tire 10 used in its original form has various sizes. If the tire has a dimension that can be accommodated while ensuring the minimum thickness of the foamed buoyant body in a substantially regular hexagonal mold set to a predetermined dimension. Even tires with slightly different sizes can be used. In general, it is preferable to use a general passenger car tire having a tire diameter of about 70 cm and a tire width of about 20 cm.

  As the foam buoyancy body 12, a foamed polyurethane resin that is blown and filled in a gap between the waste tire and the mold frame in a state where the waste tire 10 is accommodated in a mold frame (not shown) is used. When the foamed buoyant body 12 is foamed into the mold, the resin adheres closely to the tire outer peripheral surface of the waste tire 10, and therefore, a bottom plate is not required in terms of structure. In the embodiment of FIG. 2, the thickness of the foam buoyancy body 12 is equal to the tread width of the waste tire 10, so that the sidewall portion of the tire is exposed from the thickness of the foam buoyancy body. The molded thickness of the body 12 is preferably set as appropriate so that the draft as the vegetation floating island 1, that is, the inundation conditions suitable for the growth environment of the aquatic plant to be planted can be realized.

  As shown in FIGS. 1 and 2, the base material storage basket (hereinafter simply referred to as “basket”) 11 has a deep bottom-shaped bowl-like shape that has a predetermined cylindrical depth and a slightly lower diameter. In this embodiment, the frame is composed of a polyethylene resin molded product in which the frame (11a, 11b) and the net 13 are integrally molded. Even when the vegetation base material 15 as the contents is filled, the ring frame 11a has several stages at predetermined intervals in the height direction and a predetermined direction in the circumferential direction so that the substantially cylindrical shape is sufficiently retained. And the vertical frame 11b is formed as a skeleton, and a net is formed between the lattices. Since the diameter of the upper opening of the basket 11 is large as a whole, the basket 11 is fixed at a predetermined position by dropping into the tire opening. However, the basket 11 is bound to a part of the tire by a resin binding wire or the like at several places. It is preferable. Thereby, even if the vegetation base material is sufficiently accommodated in the basket, the basket does not fall off. The opening of the net is such that the frame shape and net strength do not deform or break even if the vegetation base material 15 is sufficiently accommodated in the basket 11, and the roots of the aquatic plant can pass sufficiently. It is preferable to make it sufficiently rough, and it is preferable to make the openings about 1.0 to 3.0 mm.

  As a modification, the above-described skeleton frame may be a molded product, and the basket 11 in which a polyethylene resin net 13 is attached to the entire inner surface of the skeleton frame may be used.

  FIG. 3 shows, as another embodiment, a cross section of the floating island unit 2 in which the basket 11 is composed only of a frame and the lower surface of the basket is covered with a base material fall prevention net 16. As shown in the figure, a covering net 16 is stretched on the lower surface of the floating island unit 2 so as to cover the entire lower surface of the basket 11 and the waste tire 10. The covering net 16 is also basically made of a polyethylene resin fiber woven cloth net that is coarsely woven with strength and openings so that the vegetation base material 15 accommodated in a frame-like basket can be sufficiently retained. As shown in FIG. 3, the end 16 a of the covering net 16 is fixed so as to be embedded in the foamed buoyancy body 12 formed around the waste tire 10. That is, in the manufacturing stage of the floating island unit 2, the upper half of the basket 11 and the waste tire 10 (when completed) in a state where the waste tire 10 is installed upside down in a mold (not shown) so that the basket 11 is on the upper side. The end 16a of the covering net 16 is positioned in the center of the mold so as to cover the lower half), and foamed urethane resin is sprayed and filled into the mold, and the covering net end 16a is placed in the foamed polyurethane. Produced by being buried securely. Moreover, it is preferable to bind the frame bottom face 11c and the covering net 16 at several places so that the covering net 16 does not hang down from the frame bottom face 11c when the vegetation base material 15 is filled.

  FIG. 4 shows a cross section of an embodiment of the floating island unit 2 in which the waste tire 10 has a stacked structure in order to further improve the stability of the floating island unit 2. In the structure in which the waste tires 10 are stacked in two stages as shown in the present embodiment, the weight of the waste tires 10 is increased with respect to the buoyancy of the floating island units 2. Is more stable. In order to manufacture the two-stage floating island unit 2, the waste of the two-stage structure in which the side surface of the waste tire 10 is bonded to the sidewall portion of the waste tire 10 in advance and bonded with sufficient strength. A tire 10 is prepared, and a basket 11 having the structure of Example 1 or Example 2 is attached using a formwork (not shown) having a height corresponding to the height of the two-tiered structure. By forming the buoyancy body portion, the floating island unit 2 can be manufactured in the same process.

  As shown in FIG. 1, a plurality of floating island units 2 configured in this manner are connected using a connecting jig to construct a floating structure that serves as a base for the vegetation floating island 1 having a predetermined planar shape. The vegetation base material 15 is filled in each waste tire 10 portion of the floating structure to form a vegetation base part. As the vegetation base material 15, an artificial lightweight aggregate, a fired granular material, or the like is used. Furthermore, it is preferable to mix them with a predetermined proportion of chip-like organic base materials such as palm fiber and water. Moreover, the thinned material and the recycled material which carbonized driftwood can also be utilized as a granular material. The extraction plant 21 is planted in the vegetation base formed in this way. As the extraction plant 21, it is preferable to select a native species rooted in a water area of a lake shore such as a lake where the vegetation floating island 1 is installed. In the present embodiment, since the basket 11 of each floating island unit 2 has a deep bottom shape, the vegetation base portion of the vegetation floating island 1 is sufficiently easily rooted.

  It has been confirmed that in the growth of such a water extraction plant, it contributes to water purification by actions such as a decrease in nutrient salts in water and an increase in dissolved oxygen. In addition, this vegetation floating island can be floated in a water area such as a dam lake and used as a floating ground facility for agricultural production. For example, it is preferable to select a high-value-added variety such as wasabi or mizuna. Since this floating ground is rocked by wind waves, the roots of planted plants can always come into contact with fresh water with high oxygen concentration near the water surface. In this way, the dam lake can be used as a production area for agricultural crops, and it can be expected to improve the water quality by absorbing the eutrophic components that have flowed in and to secure a breeding place for small fish. In addition, when installing floating ground facilities for agricultural production in a place away from the shore, a small ship is used for access to the facility, but in order to ensure safety at the time of berthing to the facility and work, It is important to consider the structure of vegetation floating islands.

  FIG. 5 is a partial cross-sectional view showing the vegetation floating island 1 after the vegetation floating island 1 is installed in a predetermined water area and a predetermined period has elapsed. As shown in FIG. 5, the vegetation floating island 1 is placed in an installation water area by an anchor cable 3. In the vegetation floating island 1 where the plant 21 has grown to some extent, the leaf stem 21a is sufficiently grown on the water, and the root 21b grown in the basket 11 can further pass through the net 13 and extend into the water. The vegetation floating island 1 having such a configuration can maintain a very stable state even when the water surface is vigorously swung by a wind wave or the like.

The fragmentary perspective view which showed one Example of the state which connected the floating island unit by this invention. Sectional drawing of one Example of a floating island unit. Sectional drawing of the other Example (covering net attachment) of a floating island unit. Sectional drawing of the other Example (tire two-tiered structure) of a floating island unit. The fragmentary sectional view which showed the vegetation floating island in the state in which the plant grew.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vegetation floating island 2 Ukishima unit 10 Waste tire 11 Basket 12 Foam buoyancy body 13 Net 15 Vegetation base material 16 Covering net 21 Plant

Claims (5)

  A foam buoyancy body having a connecting portion at a predetermined position on the outer edge is formed around the waste tire, and a vegetation base accommodating portion protruding downward from the lower surface opening of the waste tire is provided, and the waste tire and the vegetation base accommodating portion are provided. Floating island unit characterized by being filled with vegetation base material.   2. The floating island unit according to claim 1, wherein the vegetation base accommodating portion is a deep bottom rod-shaped body having a predetermined opening that protrudes downward from a lower surface opening of the waste tire.   2. The floating island unit according to claim 1, wherein the vegetation base accommodating portion has a shape in which a deep bottom-shaped frame that protrudes downward from the lower surface opening of the waste tire is covered with a net.   2. The floating island unit according to claim 1, wherein the waste tires are stacked in multiple stages, and the foamed buoyancy body is formed around the waste tires stacked in multiple stages.   While connecting the floating island unit of any one of Claims 1 thru | or 4 to a predetermined plane shape through the said connection part, planting a water extraction plant on the said vegetation base material, and being fixed to the installation water area. Vegetation floating island characterized by that.

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