JP2005295836A - Float island unit and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a float island unit obtained by utilizing waste tires in view of recycle of products, forming an artificial float island on which aquatic plants are planted so as to match the surrounding scenery, and excellent in dynamic stability. <P>SOLUTION: The method for producing the float island unit 2 obtained by forming a foamed buoyant body 12 having joint parts at prescribed positions of its outer periphery around each of a plurality of waste tires 10 joined to each other, and charging a vegetation base material 15 in the waste tire 10 of the unit body covered with a palm fiber-containing nonwoven protective mat 18 comprises the following process: putting the plurality of waste tires 10 connected in advance in a side plate forming frame; charging a foaming resin material in a space surrounded with the waste tires 10 and a frame side plate to form the unit body; vertically inverting the unit body after solidification of the foaming resin material, opening the upper surface opening of each of the waste tires 10 covered with the protective mat, and charging the vegetation base material 15 into each of the waste tires 10 whose bottom surface opening is sealed with a mesh 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a floating island unit and a method for manufacturing the same, and the main structure of the floating island unit using waste tires from the viewpoint of product recycling and the connected floating island unit are covered with aquatic plants and grown. The present invention relates to a method of manufacturing a floating island unit that can maintain a stable structure and streamline the manufacture and connection between the units.

  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, some of the above-mentioned extraction plants have a height of 2 m or more when grown, and in that case, the center of gravity of the vegetation floating island becomes high, and the conventional floating island unit constructed by connecting individual floating island units as described above. On Vegetation Ukishima, there was a problem with floating stability. In addition, when constructing a vegetation floating island by connecting conventional floating island units so as to cover a relatively wide water surface, a large number of single floating island units must be performed in an unstable working state, and connection jigs, etc. If there is an error in the mounting position, etc., the error accumulates, and there is a possibility that a portion that cannot be connected well will be generated.

  In addition, since a plurality of connected floating island units are connected with a structure almost similar to a pin structure, a phase difference occurs between the individual floating island units when a wind wave with a large amplitude occurs on the lake surface due to strong winds or the like. If a repeated load is generated at each connection location and an excessive load is applied, the connection location may be damaged, and the vegetation floating island may be divided.

  In addition, when the conventional floating island unit is used as a vegetation floating island, the black sidewall portion of the waste tire and the light-colored foamed polyurethane surface around it are exposed until the plant planted in the tire opening has grown. In addition, the entire vegetation floating island is divided into a part where plants are prosperous and a color part of the floating island unit itself as a floating structure. In addition, in the summer season and the like, strong sunlight hits the exposed tire surface, and the temperature of the base material in the waste tire becomes high, which may adversely affect plant roots. When the foamed polyurethane part is exposed to sunlight for a long period of time, deterioration or discoloration of the polyurethane is expected, and the deteriorated part may be scraped off by waves or the like.

  Therefore, the object of the present invention is to solve the problems of the conventional technology described above, to improve the efficiency of the connecting work between the units, and after being connected to a predetermined shape and used as a vegetation floating island, A floating island unit that can maintain stability even when tall aquatic plants grow, can ensure its stability even in strong winds, etc. It is to provide.

  In order to achieve the above object, according to the present invention, a unit body in which a foam buoyant body is formed around a plurality of waste tires connected via a connecting portion is covered with a protective mat, and the waste tire upper surface opening is opened. In addition, the lower surface opening is closed with a mesh, and the waste tire is filled with a vegetation base material.

  The protective mat is preferably a non-woven mat containing palm fibers.

  It is preferable that almost the entire lower surface of the unit body is covered with a net whose end is fixed in the foam buoyancy body.

  As a method of manufacturing a floating island unit, a side plate mold frame on which a foam buoyant body having a predetermined thickness can be formed around a plurality of waste tires connected via a connecting portion is placed on a protective mat. A plurality of waste tires connected via the connecting portion are placed inside, and a unit body is formed by filling a space surrounded by the waste tire and the mold side plate with a foamed resin material, and the foamed resin material The solidified unit body is turned upside down to open the upper surface opening of the waste tire covered with the protective mat, and the vegetation base material is filled into the waste tire whose lower surface opening is closed with a mesh. Features.

  According to the present invention, the connected floating island units are covered with aquatic plants and can maintain a stable structure even when grown, and the connection between the floating island units is rationalized to efficiently construct the vegetation floating islands. It is possible to take into account the landscape of the vegetation floating islands during the growth process of the vegetation floating islands, and further to prevent deterioration and discoloration of members constituting the floating island unit.

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

  FIGS. 1A and 1B are plan views of the floating island unit 2 formed in a state in which three waste tires 10 are connected in a straight line (in one row) with a connecting metal fitting 19. In FIG. 4A, the floating surface unit 2 having the entire surface covered with the protective mat 18 and cut off the position corresponding to the upper surface opening of the waste tire 10 and having three openings is shown in FIG. For illustrative purposes, the unit body of the floating island unit 2 from which the protective mat 18 has been removed is shown. FIG. 2A is a cross-sectional view taken along the line IIa-IIa in FIG. The configuration of the floating island unit 2 will be described with reference to these drawings.

  As shown in FIG. 1 (a), the floating island unit 2 has an external appearance in which a protective mat 18 is integrally formed with a unit body integrally formed with three regular hexagons arranged in a row and one side adjacent to each other. It consists of a coated configuration. From each opening 18 a of the protective mat 18 cut into a circle, a part of the bottom mesh 13 fixed to the lower surface opening of the waste tire 10 and the vegetation base material 15 filled in the tire 10 can be seen. Finally, the vegetation base material 15 is filled in all tires.

  As shown in FIG. 1B, the unit main body of the floating island unit 2 is a foamed polyurethane in which three waste tires 10 are fixed in a row by a connecting metal fitting 19 and the periphery thereof is substantially equal to the thickness of the tire tread. The foamed buoyancy body 12 is made of resin. As is clear from FIG. 1B, the foamed buoyancy body 12 has a shape in which three substantially regular hexagonal portions each having a planar dimension with a minimum thickness secured around the waste tire 10 are arranged in a straight line. A bottom mesh 13 is fixed to the lower surface opening of each waste tire 10.

  The waste tire 10 refers to a tire that is used as a vehicle tire and is, for example, a tire that has been made unsuitable for riding due to wear of a tread pattern and is discarded for use in its original form (product recycling). The waste tire 10 used in its original form has various sizes, but is accommodated in a substantially regular hexagonal formwork after adjusting the dimensions of a connecting jig (not shown) for connecting adjacent waste tires 10 to each other. As long as the tire has a possible size, a tire having a slightly different size can be used as appropriate. 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 is used which is blown and filled in a gap between the waste tire 10 and the mold frame in a state where the waste tire 10 is accommodated in a mold frame (not shown). . 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.

  On the other hand, a bottom mesh 13 is attached to the lower surface opening of the waste tire 10 in order to accommodate the vegetation base material 15 in the waste tire 10. In the present embodiment, a stretched grid mesh made of polyethylene resin having an opening that does not allow the granular vegetation base material 15 to pass through is used as the bottom mesh 13. The periphery of the bottom mesh 13 is bonded to the inner surface of the bead 10 a of the waste tire 10. At this time, it is preferable to appropriately set the mesh material, adhesive strength, and the like so that sufficient strength can be obtained even when the granular vegetation base material 15 is packed in the tire 10 and floated on the water surface. The mesh opening is preferably sufficiently rough so that the vegetation base material 15 can be held in the tire and the roots of aquatic plants can pass sufficiently, and a mesh of about 1.0 to 3.0 mm is used. preferable. Note that the mesh opening may be adjusted by overlapping a plurality of coarse meshes.

  In the present invention, the protective mat 18 is formed of a roll-like mat having a thickness of about several millimeters to 1 cm obtained by processing natural palm fiber as a nonwoven fabric, when the foamed buoyant body 12 is molded as described later. It is integrated on the surface and is finally cut according to the three-dimensional shape of the floating island unit, and the upper surface and side surfaces of the floating island unit are covered with the protective mat 18. The thickness of the protective mat is preferably about 5 to 6 mm. If the mat is too thin, there is a risk that sufficient protection will not be achieved if the spilled material collides. It is difficult to perform a bending process in accordance with the shape of the foam buoyancy body 12. Further, as a material of the protective mat 18, other various natural fibers, for example, jute, corn fiber and the like are mixed at a certain ratio to adjust the mat color, or a synthetic resin for improving the durability. It is also possible to use a mixture of fibers.

  FIG. 2B is a cross-sectional view of a floating island unit in which a covering net 16 is stretched on the bottom surface of the floating island unit so as to cover the entire bottom surface of the foamed buoyancy body 12 and the waste tire 10 as another embodiment. As shown in the figure, when the covering net 16 is used in combination with the above-described bottom mesh 13, when the bottom mesh 13 is damaged, the granular vegetation base material 15 filled in the tire falls into the water. Can be prevented. In this embodiment, a synthetic resin fiber net such as a polyamide resin fiber (trade name: nylon) net or a polyvinyl alcohol resin fiber (trade name: vinylon fiber) is used for the covering net 16. 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 to be described later, with the waste tires 10 installed upside down so that the bottom mesh 13 is located on the top surface, the entire upper surface of the three waste tires 10 connected (finished) Covered to cover the lower half of the time). As a result, when the polyurethane foam resin is sprayed and filled into the mold, the coated net end 16a is positioned at the center of the mold so as to be securely embedded in the urethane foam. . The covering net 16 has a strength that does not cause excessive deformation or damage even when the bottom mesh 13 is broken and a large amount of vegetation base material 15 is spilled and collected in the covering net 16 as the opening of the net. It is preferable that the opening is sufficiently rough so that the accumulated vegetation base material 15 does not fall, and the roots of the aquatic plants grown through the bottom mesh 13 can further pass outside the net.

  In order to further improve the stability of the floating island unit, the waste tire 10 has a two-tiered structure, and is connected to the straight lines, and the foamed buoyant body 12 made of urethane foam is configured to cover these. Is also possible. 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 this case, since the weight per plane of the floating island unit 2 is twice that of the normal, it is preferable to set the number of connections so as not to hinder the transportation of the completed floating island unit.

  The floating island units 2 configured as described above are connected using a connecting jig 14 (see, for example, each of FIGS. 1A and 1B) 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 into each waste tire 10 having this 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. 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.

  FIG. 3 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 certain period of time has passed. As shown in the figure, the vegetation floating island 1 is placed in the installation water area by the 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 base material further passes through the bottom mesh 13 and extends into the water. In the stage shown in FIG. 3, since the plant has not grown to the extent that the entire vegetation floating island is covered with the entire plant that has grown, the surface of the floating island unit that constitutes the vegetation floating island is in an exposed state. Since the surface of the floating island unit is covered with the protective mat 18 made of dark brown palm fiber or the like, the natural mountain appears to be exposed on the landscape, and a natural feeling is obtained. In addition, since the waste tire 10 and the foamed buoyancy body 12 are covered with the protective mat 18, it is possible to reliably prevent the progress of deterioration when exposed to sunlight.

  FIG. 4 is a schematic plan view showing a modified example of the connection shape of the floating island unit 2. In this floating island unit 2, as shown in the figure, three waste tires 10 are connected in a substantially equilateral triangle shape, and a regular hexagonal foam buoyant body 12 is formed in a substantially Y shape so as to constitute its outer shape. The molded body is integrally molded and the whole is covered with a protective mat 18. In this case, the formed floating island unit 2 is connected in a combination as shown in the figure, or connected in combination with the linear floating island unit 2 (FIG. 1A) shown in FIG. A vegetation floating island with a flat layout can be constructed. In addition, as the number of waste tires 10 to be connected to form the floating island unit 2 and the connection shape, there should be no problem in the structure after completion, and the shape and dimensions should be such that there is no hindrance to operations such as transportation and installation. is required.

  In addition, as the connection jig 14 (refer each figure of FIG. 1) for connecting the floating island units 2 to each other, the attachment work of the connection jig 14 and the connection work between the floating island units can be easily performed. For example, a sleeve of a predetermined length if the structure and shape are strong enough to hold the connection structure against loads acting on vegetation floating islands (loads during work, wind waves, collision loads on ships, etc.) Various types of jigs can be used, such as a steel bolt whose connection position can be adjusted using a steel plate, a steel processed member that uses a shape of the shape steel as a connection locking portion, and the like.

  Next, the manufacturing procedure of the floating island unit 2 shown in FIG. 1A will be described with reference to FIGS. FIG. 5 is a schematic perspective view showing a mold for manufacturing a floating island unit 2 of a type in which waste tires 10 are connected in series in triplicate. As shown in the figure, this formwork is a formwork without a bottom plate composed of a side plate 31 and a frame body 32 that reinforces the side plate. Hereinafter, the procedure for manufacturing the floating island unit 2 using the mold 30 will be described with reference to FIGS. First, the mold frame 30 is placed on the protective mat 18 that has an area larger than the mold frame shape, the waste tire 10 is installed in the mold frame 30, and the waste tires 10 are connected via the connection fittings 19. . At this time, the bottom tire 13 is attached to the waste tire 10, and each waste tire 10 is installed so that the bottom face mesh 13 is on the upper side. At that time, a connecting jig 14 with an adjacent floating island unit 2 or a box opening portion to be attached later is installed between the waste tire 10 and the formwork side plate 31. Further, as shown in FIG. 6B, foamed polyurethane is sprayed and filled in a predetermined layer between the waste tire 10 and the formwork side plate 31. A part of the foamed polyurethane filled at this time penetrates into the palm fibers of the nonwoven fabric-like protective mat 18 laid on the bottom, and the protective mat 18 and the foamed buoyant body 12 are in close contact with each other. The frame is removed when the foamed buoyancy body 12 is sufficiently cured after a predetermined curing period. At this time, the floating island unit 2 is turned upside down, the protective mat 18 of the unit body covers the upper surface, the protective mat 18 at a position corresponding to the opening on the tire upper surface is cut into a circle, and an opening 18a is formed. Accordingly, the protective mat 18 is cut into a shape that covers the side surface of the floating island unit and bonded to the foamed buoyancy body 12 to complete the floating island unit 2 (see FIG. 7).

  FIGS. 8A and 8B are diagrams showing a procedure in which the covering net 16 shown in FIG. 2B is attached at the same time when the floating island unit is manufactured. As shown in the figure, following the process shown in FIG. 6A, the entire waste tire 10 is covered with the covering net 16 (see FIG. 8A). At this time, the end 16a of the covering net 16 is positioned at the center of the formwork space between the tire side surface and the side plate 31. From this state, as shown in FIG. 8B, the foamed polyurethane is sprayed and filled between the waste tire 10 and the formwork side plate 31. As a result, as shown in FIG. 2B, the coated net end 16 a can be reliably fixed in the foam buoyancy body 12.

  FIG. 9 shows an example of a vegetation floating island floating on the lake surface. As shown in the figure, this vegetation floating island is constructed by connecting each side of a triple-type floating island unit or a double-type floating island unit. A state in which the vegetation base material 15 is filled therein and a state in which the bottom mesh 13 is exposed from the opening 18a formed in the protective mat 18 are shown. As the vegetation base material 15, an artificial lightweight aggregate, a fired granular material, or the like is used. Further, it is also preferable to mix them with a predetermined proportion of organic base materials such as chip-like palm fibers and water. Moreover, the thinned material and the recycled material which carbonized driftwood can also be utilized as a granular material. And it is preferable to plant a water extraction plant in this base material part, and to comprise a vegetation floating island.

  In addition, there are cases where this vegetation floating island is used to use the dam lake as a production area for crops, to absorb the eutrophic components that flowed in, improve the water quality, and secure a breeding place for small fish, etc. is there. Assuming this type of use, a floating ground facility for agricultural production or aquaculture is installed at a location away from the shore, and small ships are used to access each facility. In order to ensure safety, the floating island unit described above is very effective in designing such facilities because there are many structurally integrated parts.

The top view which showed one Example of the floating island unit of this invention. FIG. 2 is a cross-sectional view taken along the line IIa-IIa shown in FIG. 1. The fragmentary sectional view which showed the state in which the plant grew in the stationary vegetation floating island. The top view which showed other Example of the floating island unit of this invention, and the example of the connection. The schematic perspective view which showed an example of the formwork used for manufacture of the floating island unit of this invention. State explanatory drawing which showed the state of the manufacturing process of the floating island unit. The whole perspective view of the floating island unit manufactured using the formwork of FIG. State explanatory drawing which showed the state of the manufacturing process by the Example of another manufacturing method. The perspective view which showed the connection state of the floating island unit typically.

Explanation of symbols

2 Floating island unit 10 Waste tire 12 Foam buoyant body 13 Bottom mesh 14 Connecting jig 15 Vegetation base material 16 Covered net 18 Protective mat 19 Connecting metal fitting 21 Plant 30 Formwork

Claims (4)

  A unit body in which a foam buoyant body is formed around a plurality of waste tires connected via a connecting portion is covered with a protective mat, and the upper surface opening of the waste tire is opened and the lower surface opening is closed with a mesh. A floating island unit comprising: the waste tire is filled with a vegetation base material.   The floating island unit according to claim 1, wherein the protective mat is made of a non-woven mat containing palm fibers.   2. The floating island unit according to claim 1, wherein almost the entire lower surface of the unit main body is covered with a net whose end is fixed in the foam buoyancy body.   On the protective mat, a side plate mold frame capable of forming a foam buoyant body of a predetermined thickness is placed around a plurality of waste tires connected via a connecting portion, and the side plate mold frame is inserted with the connecting portion therebetween. A plurality of waste tires connected together, and a unit body is formed by filling a space surrounded by the waste tire and the mold side plate with a foamed resin material, and the unit body after the foamed resin material is solidified. Flip island unit is manufactured by flipping up and down to open the upper surface opening of the waste tire covered with the protective mat and filling the vegetation base material into the waste tire whose lower surface opening is closed with a mesh Method.

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