JP2019195275A - Columnar body - Google Patents

Abstract

To provide a columnar body suitable for proliferation by implanting zoospores of a seaweed of Laminariaceae floating in the seawater, or zoospores of sargassum.SOLUTION: Columnar bodies C, D for proliferation by implanting zoospores of a seaweed floating in the seawater have projections 2 in a longer direction or grooves 5 in a circumferential direction, formed on outer peripheral surfaces. There are a plurality of projections 2 in the longer direction or a plurality of grooves 5 in the circumferential direction, formed in the outer peripheral surface. The columnar bodies C, D comprise ferroconcrete, and have reinforcing bars 7 or steel frames exposed to one end part 6 in the longer direction, or have columnar projections 8 of a previously set thickness.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a columnar body for implanting and propagating seaweed spores and young embryos floating in seawater, and more particularly to a columnar body that can be used when constructing an algal reef.

  Various seaweed spores and young embryos are floating in the seawater, and in the process of floating, they lay on the reefs and the seabed and reproduce. In such natural breeding, stable growth cannot be expected, and therefore, algae reefs are installed in the sea to implant spores and young embryos. By growing seaweed in this way, it is possible not only to collect the seaweed that has grown, but also to promote the growth of sea urchins, turban shells, abalone, etc., and to restore and preserve fishing ground functions. it can.

  As the algae reef for installing seaweeds in the sea, those having various shapes and structures have been proposed. For example, the technique described in Patent Document 1 relates to an artificial reef unit and an algae reef configured by standing the artificial reef unit on a base. In this artificial reef unit, both ends in the longitudinal direction of a plurality of timbers are respectively fixed by a fixing plate, and the center portions in the longitudinal direction of the plurality of timbers are bundled by an intermediate binding tool. In particular, by using thinned wood as the wood constituting the artificial reef unit, the thinned wood can be effectively used.

  In addition, the algal reef is composed of a base made of concrete, a plurality of concrete pillars with lower ends embedded in the base, and a plurality of timbers that are detachably attached to the concrete pillars. And a unit. In this artificial reef, when installed in the sea, spores of seaweed adhere to the surfaces of the pillars and the base, and these grow and proliferate. And an underwater forest can be comprised because the seaweed adhering to the pillar standing up from the base grows. Since the unit is configured to be attachable to and detachable from the concrete column body, it is advantageous because it can be easily replaced with a new unit when the unit is consumed.

JP 2013-042705 A

  Recently, there has been a demand to identify and proliferate the seaweeds and hondawales of the order of the kombu. However, in the technique described in Patent Document 1, the artificial reef unit is configured as a pillar body in which a plurality of timbers are arranged on the circumference and both ends are fixed by a solid plate, and the central part is bound by an intermediate binding tool. The outer surface of the artificial reef unit is defined by the surface skin of the wood, and there is a possibility that a specific seaweed cannot necessarily be deposited.

  An object of the present invention is to provide a columnar body suitable for implantation and propagation of spores and young embryos of seaweeds such as spores of the order of seaweeds or juveniles of the sea urchins floating in seawater. It is in.

  In the course of the development of the alga reef, the inventors of the present invention said that the seaweed zoospores of the order are easy to land on a substantially vertical surface, and that the larvae of the Honda walla are easy to land on a substantially horizontal surface. I got the knowledge. For this reason, the columnar body according to the present invention for solving the above-mentioned problems is a columnar body for implanting and propagating spores and young embryos of seaweed floating in seawater and formed on the outer peripheral surface. It has longitudinal protrusions or circumferential grooves.

  In the columnar body, it is preferable that there are a plurality of longitudinal protrusions or circumferential grooves formed on the outer peripheral surface.

  Further, any of the above-mentioned columnar bodies is made of reinforced concrete and has a reinforcing bar or a steel frame exposed at one end in the longitudinal direction, or has a columnar protrusion with a preset thickness. Is preferred.

  Since the columnar body according to the present invention has a protrusion in the longitudinal direction or a groove in the circumferential direction formed on the outer peripheral surface, it can proliferate by depositing a seaweed zoospore on the protrusion in the longitudinal direction, Alternatively, it is possible to propagate the seedlings of Honda Wallaceae on the side surface of the circumferential groove.

  In addition, when a plurality of protrusions in the longitudinal direction of the outer peripheral surface or a plurality of grooves in the circumferential direction are formed, spores and young embryos can be implanted on the side surfaces of the respective protrusions or grooves. Can be used over a wide range.

  In addition, the columnar body is made of reinforced concrete, and has a reinforcing bar or a steel frame exposed at one end in the longitudinal direction, or has a columnar protrusion with a preset thickness. The columnar body can be handled as a component constituting the algal reef.

  That is, when a concrete base is manufactured, the alga reef can be manufactured by fastening concrete with a reinforcing bar or a steel frame of a columnar body manufactured in advance. In addition, by forming a concave groove in the base in advance and fitting concrete with a columnar protrusion of the columnar body in this groove, a concrete alga reef can be manufactured.

It is a figure explaining the columnar object concerning the 1st example. It is a figure explaining the columnar body which concerns on 2nd Example. It is a figure explaining the other example of a columnar body.

  Hereinafter, the columnar body according to the present invention will be described. The columnar body according to the present invention allows spores and young embryos floating in seawater to be implanted, and enables the implanted spores and young embryos to proliferate. For this reason, protrusions in the longitudinal direction or grooves in the circumferential direction are formed on the outer peripheral surface of the columnar body.

  The surface is changed into an uneven surface by the longitudinal protrusions or circumferential grooves formed on the columnar body, and when seawater collides with the columnar body, the flow changes along the protrusions and grooves. For this reason, the opportunity that the spore and the young embryo which are floating in seawater collide with the processus | protrusion and groove | channel formed in the columnar body increases, and it becomes easy to land. In particular, when seawater that has collided with the projection becomes a vortex along the projection, the opportunity for landing increases and the landing becomes easier.

  By installing the columnar body according to the present invention upright in seawater, the protrusions formed in the longitudinal direction constitute a substantially vertical surface, so that the seaweeds of the order of the seaweed that lands on the vertical surface and proliferates mainly It becomes possible for the zoospore to land and multiply. Moreover, since the groove | channel formed in the circumferential direction comprises a substantially horizontal surface of the groove | channel, it becomes possible that the seedlings of Honda Wallaces mainly land and propagate.

  In the present invention, the columnar body only needs to have either one of a protrusion in the longitudinal direction or a groove in the circumferential direction corresponding to the seaweed to be grown. However, in the case where both the seaweed zoospores and the moth embryos of the kingdom are to be implanted and proliferated, it is preferable that both the longitudinal protrusions and the circumferential grooves are formed.

  The columnar body according to the present invention is not limited in shape, and may be any columnar body that is formed in a so-called columnar shape having a length longer than the thickness. The thickness is preferably about 300 mm in consideration of the prosperous state when spores and young embryos are implanted and proliferated. Moreover, it is necessary to set the length according to the depth of the place to be installed in the sea, and it is preferable that the length is about 0.5 m to 4 m according to the target seaweed.

  The number of longitudinal protrusions or circumferential grooves formed on the columnar body is not limited, and may be one or plural.

  Moreover, the height dimension of the protrusion formed in the longitudinal direction of the columnar body is not limited, and the width dimension is set according to the number to be formed. In particular, the shape of the recess formed between adjacent protrusions is preferably a smooth curved shape, and by having such a shape, the flow direction of the colliding seawater can be changed smoothly when installed in the sea. It becomes possible to make it. For example, when the outer diameter of the columnar body is about 300 mm, the depth of the recess is preferably about 20 mm.

  The depth and width dimensions of the grooves formed in the circumferential direction of the columnar body are not limited, and the dimensions should be such that the larvae of Honda Walla are easy to land and can grow easily after being landed. Is preferred. The angle formed between the bottom surface and the side surface of the groove is preferably an obtuse angle. In such a groove, when the columnar body is installed substantially vertically in the sea, the side surface of the groove becomes a substantially horizontal surface having a gentle slope, and the larvae of Honda Wallaceae floating in the sea can be easily implanted. Such a groove preferably has a depth of approximately 20 mm, a width dimension at the bottom surface of approximately 50 mm, and a width dimension at the outer diameter portion of the columnar body of approximately 60 mm.

  The material constituting the columnar body is not particularly limited, but is preferably made of concrete in consideration of easiness of forming the longitudinal protrusions and circumferential grooves formed on the surface. When the columnar body is made of concrete, it is preferable that a part of the reinforcing bar or the steel frame arranged in the columnar body is exposed from one end portion (lower end surface) in the longitudinal direction of the columnar body.

  As described above, by exposing the reinforcing bar or the steel frame from the lower end surface of the columnar body, it can be handled as a component when manufacturing the alga reef having the columnar body as a component. That is, when manufacturing the algae reef, by connecting the rebar or steel frame exposed from the lower end surface of the columnar body to the rebar or steel frame arranged in the base mold, by placing concrete in the mold, It is possible to produce an algae reef with a columnar body as an element.

  A columnar protrusion may be formed on the lower end surface of the columnar body. When such columnar protrusions are formed, a hole that allows the columnar protrusions to be fitted into the base is formed in advance, and after the columnar protrusions are fitted into the holes, the columnar bodies are erected on the base. It is possible to produce algae reef by placing concrete in the hole and integrating the columnar body with the base.

  As described above, the rebars expose the steel frame from the lower end surface of the columnar body or form columnar protrusions, so that it is possible to configure the columnar body as one of the parts when manufacturing algae reef. It is possible to rationalize the manufacturing process of algae reefs with columns as elements, and in particular, to manufacture algae reefs with columns as elements in an integrated formwork, increase the size of the formwork. Inevitably, process complexity cannot be avoided, but the columnar body can be manufactured as a part different from the base to handle the simplification of the process and the diversification of the dimensions of the base. Is possible.

  Next, a preferred embodiment of the columnar pair according to the present invention will be described with reference to the drawings. The columnar body A shown in FIG. 1 has a total length of about 2000 mm. Three protrusions 2 are formed in the longitudinal direction of the outer peripheral surface 1, and a recess 3 is formed between the protrusions 2. Therefore, the surface of the protrusion 2 remains the outer peripheral surface 1 of the columnar body A. In addition, the recess 3 is formed as a concave curved surface. The outer diameter of the columnar body A (the diameter of the circumscribed circle of the protrusion 2) is set to about 300 mm, and the diameter of the inscribed circle of the recess 3 is set to about 260 mm. Accordingly, the depth of each recess 3 is set to approximately 20 mm.

  Further, two grooves 5 are formed on the outer peripheral surface of the columnar body A in the circumferential direction with an interval of about 1000 mm. Each groove 5 is set to a depth of about 20 mm, and the deepest position of the bottom surface 5a and the recess 3 is formed in common. The width dimension of the bottom surface 5a of the groove 5 is set to about 50 mm, and the width dimension of the portion where the side surface 5b of the groove 5 opens in the outer peripheral surface 1 of the columnar body A is set to about 60 mm.

  In the columnar body A configured as described above, when installed substantially vertically at a relatively deep position in the sea, the protrusions 2 and the recesses 3 are substantially vertical surfaces, and the side surfaces 5b of the grooves 5 are substantially horizontal surfaces. And when the seawater which flows into the columnar body A collides, seawater will flow along the surface of the protrusion 2 and the dent 3, and the time that the seawater is in contact with the surface of the protrusion 2 and the dent 3 of the columnar body A is lengthened. It becomes possible to do. For this reason, it becomes possible to increase the opportunity for the seaweed zoospores floating in the seawater to land on the protrusions 2 and the depressions 3 of the columnar body A.

  Further, a part of the seawater that collided with the columnar body A directly flows into the recess 3 and flows along the periphery of the bottom surface 5a of the groove 5, and at this time also contacts the surface of the side surface 5b. For this reason, the chance that young embryos, such as a honda beetle floating in the seawater which flowed into the groove | channel 5, will land on the side surface 5b will increase.

  In addition, when only the circumferential groove 5 is formed on the outer peripheral surface 1 of the columnar body A, it is not limited to forming only two grooves as shown in the figure, and an appropriate interval (for example, approximately 400 mm) is provided. 3 or 4 may be formed.

  The columnar body B shown in FIG. 2 has an overall length of about 500 mm and an outer diameter of about 300 mm. Thus, although the ratio of thickness and length is not large, since it is formed in a substantially columnar shape, it is included in the range as a columnar body in the present invention.

  Twelve protrusions 2 are formed in the longitudinal direction on the outer peripheral surface of the columnar body B, and a recess 3 having a curved surface is formed between adjacent protrusions 2. Further, one groove 5 is formed at a predetermined position on the outer peripheral surface 1 (a position approximately 100 mm from the upper end).

  In the columnar body B configured as described above, when installed substantially vertically at a relatively shallow position in the sea, the protrusions 2 and the recesses 3 are substantially vertical surfaces, and the side surfaces 5b of the grooves 5 are substantially horizontal surfaces. And when the seawater which flows into the columnar body A collides, since many protrusions 2 and depressions 3 are formed, the flow of the seawater changes in a complicated manner and the contact time with the protrusions 2 and the depressions 3 becomes long. For this reason, it becomes possible to increase the opportunity for the seaweed zoospore to land.

  Next, the columnar bodies C, D, and E shown in FIG. 3 will be described. In the figure, the same parts as those in the above-described embodiment or parts having the same functions are denoted by the same reference numerals, and description thereof is omitted.

  The columnar body C shown in FIG. 3A is made of reinforced concrete, and the steel frame 7 is exposed from the lower end surface 6. The cross-sectional shape and size of the steel frame 7 are not limited, and H-shaped steel, channel steel, etc. are appropriately selected according to the conditions such as the length and thickness of the columnar body C and the specifications of the base (not shown). Is preferably set. In this embodiment, H-shaped steel is used as the steel frame 7.

  The columnar body D shown in FIG. 2B is made of reinforced concrete, and the reinforcing bar 8 is exposed from the lower end surface 6. Specifications such as the dimensions of the reinforcing bar 8 and the number and thickness of the vertical bars are not limited, and may be appropriately set according to conditions such as the length and thickness of the columnar body D and specifications of the base (not shown). preferable.

  The columnar body E shown in FIG. 5C is made of concrete, and has a columnar protrusion 9 formed on the lower end surface 6. The thickness and length of the columnar protrusions 9 are not limited, and it is preferable that the columnar protrusions 9 are appropriately set in accordance with conditions such as the length and thickness of the columnar body E and the specifications of a base (not shown).

  The columnar bodies C to E configured as described above have a function as a component part when manufacturing the alga reef, and are assembled to the reinforcing bars arranged in the mold for manufacturing the base or based on the bases in advance. It is possible to manufacture an algae reef with a columnar body as a constituent element by fitting it into a hole formed in a table and placing concrete in the formwork.

  The columnar body according to the present invention is advantageous for selectively or both of the use in the seaweeds of the kombu that grow on the substantially vertical surface and the seaweeds that grow on the substantially horizontal surface. . In particular, when the columnar body is a constituent element of the algal reef, it can be advantageously applied regardless of the shape of the base by recognizing it as an independent component.

A to D Columnar body 1 Outer peripheral surface 2 Protrusion 3 Indentation 5 Groove 5a Bottom surface 5b Side surface 6 Lower end surface 7 Reinforcement rod 8 Columnar protrusion

Claims (3)

A columnar body for implanting and spreading spores and young embryos of seaweed floating in sea water,
A columnar body having a longitudinal protrusion or a circumferential groove formed on an outer peripheral surface.   The columnar body according to claim 1, wherein there are a plurality of longitudinal protrusions or circumferential grooves formed on the outer peripheral surface.   It consists of reinforced concrete, has a reinforcing bar or steel frame exposed at one end in the longitudinal direction, or has a columnar protrusion with a preset thickness. Columnar body.

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