JP3577639B2

JP3577639B2 - Artificial reef

Info

Publication number: JP3577639B2
Application number: JP2002105316A
Authority: JP
Inventors: 秀寿山根
Original assignee: 秀寿山根
Priority date: 2002-04-08
Filing date: 2002-04-08
Publication date: 2004-10-13
Anticipated expiration: 2022-04-08
Also published as: JP2003289746A

Description

【０００１】
【発明の属する技術分野】
本発明は、長尺部材や水底沈設部材を構成要素として、河川や海等の水底に沈設する人工魚礁に関するものである。
【０００２】
【従来の技術】
従来から、河川や海等の水底に人工的に隆起部を形成して魚介類の生息に適した環境とすることにより、魚介類を集め、漁場の造成や拡充を図るために人工魚礁が用いられる場合がある。このような人工魚礁としては、例えば、一定の形状に形成したコンクリートブロックを用いるものや、鋼材や古タイヤなどの廃材を一定の形状に組み立てたもの等がある。
【０００３】
しかしながら、上記のような従来のコンクリートブロックを用いた人工魚礁は、コンクリートの表面はアルカリ性が強く、また表面の凹凸も少ないために水草、海草、藻等が付着しにくく、貝類や小魚が集まりにくいために集魚効果が低いという問題がある。一方、廃材を用いた人工魚礁は、経年変化が激しく、また外観もあまり良くないという問題がある。更に、これらの人工魚礁は、重量も相当に重いものとなるので、運搬や設置が容易でなく、また一旦設置した後は移動が困難であるという問題もある。
【０００４】
【発明が解決しようとする課題】
本発明は上記課題に鑑みてなされたものであって、水草、海草、藻等が付着し易く集魚効果が高く、経年変化も少なく、なおかつ運搬、設置及び移動等が容易な人工魚礁を提供することを技術課題とするものである。
【０００５】
【課題を解決するための手段】
上記技術課題を解決するための具体的手段は、次のようなものである。すなわち、請求項１に記載する人工漁礁は、長尺部材を井桁形状等の多角形形状に組み合わせ積み重ねたものの周囲または内外部に、貫通孔を形成した自然石、該自然石の貫通孔に挿通されて前記自然石を連結する連結部材及び該連結部材の両端に結合された鉤状部材または前記貫通孔の内径より大きい外形を有する係止部材とを具備し、且つ、各自然石の間に配置された間伐材を具備する水底沈設部材を配置したことを特徴とするものである。
【０００６】
請求項２に記載する人工漁礁は、請求項１に記載する構成において、前記長尺部材が間伐材であることを特徴とするものである。
【０００７】
請求項３に記載する人工漁礁は、請求項１に記載する構成において、前記長尺部材が金属部材であることを特徴とするものである。
【０００８】
請求項４に記載する人工漁礁は、請求項２に記載する構成において、前記間伐材の表面に金属板を固定したことを特徴とするものである。
【０００９】
請求項５に記載する人工漁礁は、前記長尺部材と、貫通孔を形成した自然石、該自然石の貫通孔に挿通されて前記自然石を連結する連結部材及び該連結部材の両端に結合された鉤状部材または前記貫通孔の内径より大きい外形を有する係止部材とを具備し、且つ、各自然石の間に配置された間伐材を具備する水底沈設部材とを井桁形状等の多角形形状に組み合わせ積み重ねたことを特徴とするものである。
【００１１】
【発明の実施の形態】
まず、図１から図４に基づいて、本発明の実施形態に係る人工漁礁１を構成している水底沈設部材２について説明する。本発明の実施形態に係る人工漁礁１を構成している水底沈設部材２は、貫通孔３を形成した単数または複数の自然石４と、該自然石４の前記貫通孔３に挿通されて単数または複数の前記自然石４を連結する連結部材５と、該連結部材５の両端に結合された鉤状部材６とを有して構成される。
【００１２】
前記自然石４には、天然の岩石を使用する。該自然石４の大きさは、小さすぎる場合には水の流れに流され易くなり、大きすぎる場合には運搬、設置及び移動等が困難になることから、直径が約１０〜８０ｃｍ程度のものを使用するのと好適である。ただし、前記自然石４の大きさは必ずしもこれに限定されるものではなく、設置場所や用途等に合わせて適当な大きさを選択して使用することが可能である。
【００１３】
前記自然石４の形状については特に限定されることなく、様々な形状の岩石を使用することができる。なお、前記水底沈設部材２は、本発明の実施形態に係る人工魚礁１の一部分として用いるので、表面に凹凸が多い岩石の方が水草や海草等が付着し易くなり好適であるが、ここでは単数または複数の前記自然石４を連結した構成としており、隣接する前記自然石４同士の隙間等において必ず凹凸が形成されることになるので、この場合であっても表面に凹凸のない比較的滑らかな表面を有する岩石をも使用することができる。
【００１４】
前記水底沈設部材２の１個あたりに使用する前記自然石４の数量についても特に制約はなく、前記連結部材５の長さに応じて１個以上何個でも連結することが可能である。ただし、前記自然石４の数量が多すぎる場合は、前記自然石４の大きさが大きすぎる場合と同様、運搬、設置及び移動等が困難になるので、通常は２〜２０個程度とし、必要に応じて適宜複数個の前記水底沈設部材２を連結して使用すると好適である。このような前記水底沈設部材２同士の連結は、前記連結部材５の両端に結合された鉤状部材６を用いて容易に行なうことができるようになっている。
【００１５】
前記自然石４には、それぞれに前記貫通孔３が形成される。該貫通孔３は、前記連結部材５をその中に挿通するために設けられるものであり、当然に前記連結部材４の直径より大きい内径を有する。前記自然石４における前記貫通孔３が設けられる位置は、通常は前記自然石４の中心を通る位置とする。ただし、前記貫通孔３が設けられる位置は必ずしもこれに限定されるものではなく、前記自然石４の端部付近に形成することも可能である。
【００１６】
前記連結部材５は、前記自然石４の前記貫通孔３に挿通されて、単数または複数の前記自然石４を連結する部材である。前記連結部材５としては、前記自然石４の重量や前記自然石４との摩擦等によって破壊されることがない材質のものを使用し、例えば一定の直径を有する長尺の金属製の棒、特に、耐腐食性及び耐衝撃性等を考慮してステンレス棒を使用すると好適である。前記連結部材５の直径は、ある程度の弾力性を持たせ、なおかつ必要な強度を確保するため、１０〜３０ｍｍ程度とすると好適である。なお、前記連結部材５の直径はこれに限定されるものではなく、連結する前記自然石４の大きさや数量に応じて適当な直径とする。前記連結部材５の長さは、使用するすべての前記自然石４を連結した状態で、両端に前記鉤状部材６を結合することができる長さ以上の長さとする。ここで、前記連結部材５の長さを長めに設定することにより、前記水底沈設部材２を水底に配置する際に、前記自然石４同士の間隔を任意に広げて配置することが可能となる。この結果、隣り合う前記自然石４間の隙間が可変となるので、海水底に凹凸があるような場合であっても、その凹凸形状に沿って折曲することができ、安定して設置できる。
【００１７】
また、図５に示すように、前述の棒状の連結部材５に代えて可撓性の紐状の連結部材５を使用する場合もある。この場合には、前記連結部材５としては、前記自然石４の重量や前記自然石４との摩擦等によって切断されることがない材質のものを使用し、例えば金属製のワイヤー、鎖、綱等を使用することができ、特に、耐腐食性及び耐久性等を考慮してステンレスワイヤーを使用すると好適である。この紐状の連結部材５の直径は、使用する材質に応じて適宜必要な強度を確保することができる直径とする。さらに、図示しないが、上述のように紐状の連結部材５を使用する場合には、端部が輪状になるように折り返し、所定の留め具等により固定した構成等とすることも可能である。
【００１８】
前記連結部材５の両端には、前記鉤状部材６がそれぞれ結合される。該鉤状部材６は、前記連結部材５により連結された前記自然石４が前記連結部材５の端部から抜けることを防止するとともに、前記水底沈設部材２は本発明の実施形態に係る人工魚礁１の一部分として使用するので、前記水底沈設部材２同士を連結するために設けられるものである。前記鉤状部材６の形状は、相互に引掛けることができる形状とし、例えばＣ字形やコ字形等とする。前記鉤状部材６の材質は、耐腐食性等を考慮して例えばステンレス等を使用する。前記鉤状部材６と前記連結部材５との結合は、この結合が容易にはずれないような構造とする。ここでは、図３に示すように、前記連結部材５の両端に雄ねじを形成し、前記鉤状部材６の結合部７に雌ねじを形成して互いに螺合させることにより結合する構成としている。なお、前記鉤状部材６と前記連結部材５との結合方法はこれに限定されるものではなく、例えば溶接やボルト・ナットを用いた締結等のように他の方法により結合することも可能である。
【００１９】
また、図６に示すように、前記鉤状部材６に代えて前記自然石４の前記貫通孔３の内径より大きい外形を有する係止部材８を前記連結部材５の両端に結合する場合もある。前記係止部材８は、前記鉤状部材６を設けない場合においても前記自然石４が前記連結部材５の端部から抜けることを防止するために設けられるものである。したがって、前記係止部材８の形状及び材質は特に限定されることなく、前記連結部材５の長さ方向と直交する方向に前記自然石４の前記貫通孔３の内径より大きい外形を有する形状のものであれば様々な形状及び材質とすることが可能である。ここでは、一例として前記連結部材５の両端に形成した雄ねじに２個の金属製のナットを螺合した構成としている。なお、前記係止部材８は、前記鉤状部材６と同様、溶接等の他の方法により結合することも可能である。
【００２０】
さらに、図７、図８に示すように、前記水底沈設部材２は、該水底沈設部材２を構成している各自然石４の間に間置間伐材９が配置されている。該間置間伐材９は、前記自然石４同士の間隔を一定に保つために前記自然石３の間に配置される部材であり、前記自然石４を連結する前記連結部材５の直径よりも大きい内径を有する間伐材の部材を使用する。前記間置間伐材９の長さについては特に制限はないが、通常は前記自然石４の直径の半分から２倍程度の長さとする。また、前記間置間伐材９の数量についても特に制限はなく、該間置間伐材９の配置構成についても特に制限はないが、ここでは、前記自然石４と前記間置間伐材９とが交互に配置している。
【００２１】
次に、本発明の実施形態に係る人工魚礁１について図９乃至１４に基づいて説明する。この人工魚礁１は、長尺部材を井桁形状等の多角形形状に組み合わせ積み重ねたものの周囲または内外部に、上述に記載した水底沈設部材２を配置して水底に沈設したもの、または前記長尺部材と前記水底沈設部材とを井桁形状等の多角形形状に組み合わせ積み重ねて水底に沈設したものである。
【００２２】
本発明の第１の実施形態に係る人工漁礁１は、主に河川や海において好適に使用されるものであって、図９に示すように、単独の前記水底沈設部材２または長さ方向に複数個連結した前記水底沈設部材２を、間伐材１０を井桁形状に組み合わせ、それらを長尺なボルトやナット等の連結具１１で連結して積み重ねた木枠１２の周囲または内外部に配置して水底に沈設したものである。この際、前記木枠１２の周囲または内外部に配置された前記水底沈設部材２の前記鉤状部材６の両端または他端は、河川及び海の底に固定していても良い。
【００２３】
前記間伐材１０については特に制限はないが、軽すぎる、または小さすぎると前記木枠１２が海水面に浮上する恐れがあり、また、重すぎる、または大きすぎると前記木枠１２の運搬、設置、移動等が困難になる恐れがあることから、長手方向が約１ｍ〜４ｍ程度のものを使用すると好適である。ただし、前記間伐材１０については必ずしもこれに限定されるものではなく、設置場所、用途及び本実施の形態の人工漁礁１を構成している前記水底沈設部材２の大きさや重さ等を考慮して、前記人工漁礁１が海水面に浮上することなく、また運搬、設置及び移動等が困難にならない程度の適当な大きさや重さ等を選択して使用することが可能である。また、本実施の形態に係る人工漁礁１は、前記間伐材１０以外の長尺部材を用いても良い。さらに、前記水底沈設部材２は図９に示すように、前記木枠１２を構成する前記間伐材１０の間を通って挿入すれば、前記木枠１２の浮き上がり防止の役割を兼ねて、この人工漁礁１を配置できる。このような配置は種々選択できる。
【００２４】
前記木枠１２の周囲または内外部に配置される水底沈設部材２の位置や数量については特に制限はなく、前記木枠１２を構成している前記間伐材１０の数量についても特に制限はない。また、前記間伐材１０を井桁状に組み上げ、それらを積み重ねる数量についても特に制限はなく、それらを積み重ねた前記木枠１２の運搬、設置、移動等や河川や海の形状等によって適宜積み重ねれば良い。さらに、前記間伐材１０を連結している前記連結具１１は、これに制限されることはなく、たとえば、ビス、ネジ、釘、接着剤等の固着手段を用いても良い。
【００２５】
上述の構成において、前記木枠１２は、比較的表面の凹凸が少ないために、藻は付着しやすいが、水草や海草等が付着しにくく、貝類や小魚が集まりにくいが、このように、前記木枠１２の内外部及び周辺部に、前記水底沈設部材２を配置することにより、本実施の形態に係る人工漁礁１に多くの凹凸部が形成される。その結果、前記自然石４に豊富な水草や海草等が付着し、貝類や小魚の生息に適した環境とすることができ、大型の魚も集まって来やすくなるので、本実施の形態に係る人工漁礁１の魚集効果を高めることができる。
【００２６】
次に、本発明の第２の実施形態に係る人工漁礁１について説明する。この人工漁礁１は、主に河川や海において好適に使用されるものであって、図示していないが、前記木枠１２を構成している前記間伐材１０に代えて、金属部材を井桁形状に組み合わせ、それらを前記連結具１１で連結して積み重ねた金属枠の周囲または内外部に、単数または長さ方向に複数個連結した前記水底沈設部材２を配置して水底に沈設したものである。前記金属部材は、前記水底沈設部材２との摩擦等によって破壊されることがない材質のものを使用し、特に、耐腐食性及び耐衝撃性等を考慮してステンレス製のものを使用すると好適である。また、前記金属部材の大きさは特に制限はないが、前記金属枠の運搬、設置、移動等が困難になる恐れがあることから、長手方向が約１ｍ〜４ｍ程度のものを使用すると好適である。以上、本実施形態に係る人工漁礁１は、前記第１の実施形態に係る人工漁礁１の前記間伐材１０を前記金属部材に代えたものであり、したがって、その他の部分については、前記第１の実施形態に係る人工漁礁１と同様であるので説明を省略する。
【００２７】
上述の構成において、前記金属枠は、比較的表面の凹凸が少なく、金属製のために藻、水草や海草等が付着しにくく、貝類や小魚が集まりにくいが、このように、前記金属枠の内外部または周辺部に、前記水底沈設部材２を配置することにより、本実施の形態に係る人工漁礁１に多くの凹凸部が形成される。その結果、前記自然石４に豊富な藻や海草等が付着し、貝類や小魚の生息に適した環境とすることができ、大型の魚も集まって来やすくなるので、本実施の形態に係る人工漁礁１の魚集効果を高めることができる。さらに、この人工漁礁１は、金属部材を構成要素としているので、耐腐食性及び耐衝撃性等に優れており、経年変化が少ないために長期間使用することが可能である。
【００２８】
次に、本発明の第３の実施形態に係る人工魚礁１について説明する。この人工漁礁１も、主に河川や海において好適に使用されるものであって、図１０、図１１に示すように、単独の前記水底沈設部材２または長さ方向に複数個連結した前記水底沈設部材２を、前記間伐材１０に金属板１３をビス１４で任意の一面または複数面に１個または複数個固定した金属板付き間伐材１５を井桁形状に組み合わせ、それらを前記連結具１１で連結して積み重ねた金属板付き木枠１６の周囲または内外部に配置して水底に沈設したものである。つまり、この人工漁礁１は、本発明の第１の実施形態に係る人工漁礁１を構成している前記木枠１２を前記金属板付き木枠１６に代えたものである。したがって、この人工漁礁１は、前記金属板１３を前記間伐材１０に固定することで該間伐材１０の浮力を低減でき、例えば、前記連結具１１が腐食して破損しても、この人工漁礁１は、海水面に浮かび上がらない効果を有している。また、前記間伐材１０の強度を向上させることができる。
【００２９】
前記金属板１３としては、前記自然石４の重量や該自然石４との摩擦によって破壊されることがないものを使用し、例えば一定の長さを有する長尺の鉄板、特に、耐腐食性及び耐衝撃性を考慮して、ステンレス板を使用すると好適である。前記金属板１３の大きさや数量は特に制限はないが、前記間伐材１０と同程度よりやや小さめの大きさが好適である。また、前記金属板１３を前記間伐材１０に固定している前記ビス１４は、これに制限されることはなく、たとえば、ネジ、釘、接着剤等の固着手段を用いても良い。なお、その他の部分については、前記第１の実施形態に係る人工漁礁１と同様である。したがって、前記水底沈設部材２の位置や数量については特に制限はない。
【００３０】
また、この人工漁礁１は、図１２に示すように、単独の前記水底沈設部材２または長さ方向に複数個連結した前記水底沈設部材２を、前記金属板付き木枠１６の前記金属板１３に連結して水底に沈設したものでも良い。この際、前記金属板付き木枠１６に連結される前記水底沈設部材２の位置や数量については特に制限はないが、重量等を考慮して、前記金属板１３の１枚あたりに連結される前記水底沈設部材２の数量は、１個から３個が好適である。
【００３１】
前記金属板１３と前記水底沈設部材２との連結手段は特に制限はないが、相互に引っ掛けることができるものとする。ここでは、図１３に示すように、レーザー等で、前記金属板１３の任意の箇所において、任意の大きさの長方形となる３辺を切断し、残る１辺を軸として折り曲げてフックを作り、そのフックに前記水底沈設部材２の他端の鉤状部材６を引っ掛けて、再び反対側に折り返してフックと前記水底沈設部材２が外れないように、前記金属板１３に前記水底沈設部材２がぶら下がっているように相互を連結した。また、ここでは、前記水底沈設部材２を前記金属板１３に連結したが、前記木枠１２、前記金属枠及び前記金属板付き木枠１６を構成している前記間伐材１０または前記金属部材に連結しても良い。なお、その他の部分については、前記第１の実施形態に係る人工漁礁１と同様である。
【００３２】
上述の構成において、前記金属板付き木枠１６は、比較的表面の凹凸が少なく、前記金属板１３を構成要素としているので、前記金属板付き木枠１６には水草や海草等が付着しにくく、貝類や小魚が集まりにくいが、このように、前記金属板付き木枠１６の内外部または周辺部に、前記水底沈設部材２を配置することにより、本実施の形態に係る人工漁礁１に多くの凹凸部が形成される。その結果、前記自然石４に豊富な藻や海草等が付着し、貝類や小魚の生息に適した環境とすることができ、大型の魚も集まって来やすくなるので、本実施の形態に係る人工漁礁１の魚集効果を高めることができる。
【００３３】
次に、本発明の第４の実施形態に係る人工漁礁１について説明する。この人工漁礁１も、主に河川や海において好適に使用されるものであって、図１４に示すように、単独の前記水底沈設部材２または長さ方向に複数個連結した前記水底沈設部材２と、それらとは垂直方向に配置した単独または複数の前記間伐材１０とを井桁形状に組み合わせ、それらを前記連結具１１で連結して積み重ねて水底に沈設したものである。ここでは、長尺部材に前記間伐材１０を使用しているが、これに限定されるものではなく、例えば前記金属部材であっても良い。さらに、ここでは、前記水底沈設部材２と長尺部材である前記間伐材１０との組み合わせ角度は、９０度としているが、これに限定されるものではなく、例えば４５度であっても良い。また、前記水底沈設部材２は、前記自然石４の間に貫通孔を形成した前記間置間伐材９を、前記自然石４と交互に配置している構成であるが、無作為に前記間置間伐材９を配置しても良い。また、前記水底沈設部材２と前記間伐材１０との連結手段は特に制限はないが、ここでは、前記間置間伐材９と前記間伐材１０とを前記連結具１１にて連結している。また、前記間伐材１０に代えて、前記金属部材及び前記金属板付き間伐材１５を使用しても良い。つまり、この人工漁礁１は、前記木枠１２、前記金属枠及び前記金属板付き木枠１６を構成している前記間伐材１０、前記金属部材または前記金属板付き間伐材１５の一部分を前記水底沈設部材２に置き代えている構成を有しているのである。
【００３４】
前記間置間伐材９については特に制限はないが、前記自然石４と同等な大きさが好適であり、前記間置間伐材９の数量も該間置間伐材９と前記自然石４との間隔も特に制限はない。また、ここでは前記連結部材５の両端には前記係止部材８を用いて、前記自然石４及び前記間置間伐材９が前記連結部材５の端部から抜けることを防止しているが、前記係止部材８は、前記鉤状部材６でも良い。
【００３５】
上述の構成において、前記間伐材１０は、比較的表面の凹凸が少ないために水草や海草等が付着しにくく、貝類や小魚が集まりにくいが、このように、前記間伐材１０と前記水底沈設部材２を配置することにより、本実施の形態に係る人工漁礁１に多くの凹凸部が形成される。その結果、前記自然石４に豊富な藻や海草等が付着し、貝類や小魚の生息に適した環境とすることができ、大型の魚も集まって来やすくなるので、本実施の形態に係る人工漁礁１の魚集効果を高めることができる。また、前記間伐材１０と前記水底沈設部材２を組み合わせて積み重ねているので、小型化、軽量化等に優れており、浅く狭い海水底等でも容易に設置できる。さらに、本実施の形態に係る人工漁礁１を設置する海水底に凹凸がある場合においても、前記水底沈設部材２を構成する前記連結部材５がある程度の弾力性を具備しているので、海水底の凹凸に応じてこの人工漁礁１全体が折曲する。したがって、安定して本実施の形態に係る人工漁礁１を設置することができる。
【００３６】
以上、本発明の第１、２、３、４、及び５の実施形態に係る人工漁礁１について説明したが、いずれも前記間伐材１０、前記金属部材及び前記金属板１３のうちの少なくとも１種以上と前記水底沈設部材２とを用いて構成された人工漁礁１であれば、どのように構成されていても良い。
【００３７】
【発明の効果】
本発明の効果を整理すると次の通りである。本発明の請求項１に係る人工漁礁によれば、長尺部材を多角形形状に組み合わせ積み重ねた構成を有しているので、設置する海水中の環境に合わせて、井桁形状や三角形状等の必要な形状に組み合わせ、その上部に積み重ねる段数も必要に応じて適宜積み重ねることができるため、必要な任意の形状の人工漁礁を安易に成形することができる。また、各構成要素は、比較的安価で重量も軽いので、運搬、設置及び移動等も容易に行なうことができる。さらに、自然石の表面や自然石間に多数の凹凸が形成されて水草、海草、藻等が付着し易いために集魚効果が高いものとすることができ、河川や海の水底に沈設した場合であっても景観を損なうことがない。加えて、各自然石の間に間伐材を配置して各自然石同士の間隔を一定に保つことができる水底沈設部材を人工漁礁の構成要素としているので、水底沈設部材の長さや形状の調節が容易に行うことができ、したがって、人工漁礁の大きさや形状も容易に調節することができる。さらに、間伐材は藻が付着しやすいので、水草や海草が付着しやすい自然石と交互に配置されることにより、水底沈設部材の全体としては水草や海草と藻の両方が好適に付着することとなるので、様々な魚介類を集めることができる人工漁礁が容易に設置することができる。
【００３８】
本発明の請求項２に係る人工漁礁によれば、上述した本発明の請求項１に係る人工漁礁の効果に加えて、間伐材を構成要素としているので、原材料が安価で重量も比較的軽く、加工性も良いので、容易に様々な人工漁礁を製作できる。また、従来のコンクリート製や金属製に比べて藻が付着しやすいので、漁礁により適したものとなる。
【００３９】
本発明の請求項３に係る人工漁礁によれば、上述した本発明の請求項１に係る人工漁礁の効果に加えて、金属部材を人工漁礁の構成要素としているので、耐腐食性及び耐衝撃性等に優れており、経年変化が少ないために長期間使用することが可能である。
【００４０】
本発明の請求項４に係る人工漁礁によれば、上述した本発明の請求項１に係る人工漁礁の効果に加えて、金属板を人工漁礁の構成要素としているので、人工漁礁を構成している間伐材の浮力を低減でき、したがって、間伐材や金属板付き間伐材を連結しているビス等が腐食しても、人工漁礁が海水面に浮上しない効果がある。
【００４１】
本発明の請求項５に係る人工漁礁によれば、上述した本発明の請求項１、２、３及び４に係る人工漁礁の効果に加えて、長尺部材と水底沈設部材を井桁形状に等の多角形形状に組み合わせ積み重ねているので、小型化、軽量化等に優れており、浅く狭い海水底等でも容易に設置できる。また、水底沈設部材を構成する連結部材がある程度の弾力性を具備しているので、海水底に凹凸があった場合でもそれに応じて人工漁礁全体が折曲するため、海水底に順応して安定に設置できる。
【００４２】
本発明の請求項６に係る人工漁礁によれば、上述した本発明の請求項１、２、３、４及び５に係る人工漁礁の効果に加えて、各自然石の間に間伐材を配置して各自然石同士の間隔を一定に保つことができる水底沈設部材を人工漁礁の構成要素としているので、水底沈設部材の長さや形状の調節が容易に行うことができ、したがって、人工漁礁の大きさや形状も容易に調節することができる。さらに、間伐材は藻が付着しやすいので、水草や海草が付着しやすい自然石と交互に配置されることにより、水底沈設部材の全体としては水草や海草と藻の両方が好適に付着することとなるので、様々な魚介類を集めることができる人工漁礁が容易に設置することができる。
【図面の簡単な説明】
【図１】複数の自然石を用いた水底沈設部材を示す平面図。
【図２】図１の断面図。
【図３】単数の自然石を用いた水底沈設部材を示す平面図。
【図４】図３の断面図。
【図５】可撓性の紐状の連結部材を使用した水底沈設部材の断面図。
【図６】係止部材を使用した水底沈設部材の断面図。
【図７】各自然石間に間置間伐材を配置した水底沈設部材の平面図。
【図８】図７の断面図。
【図９】間伐材を組み上げた井桁形状の木枠内外に水底沈設部材を組み込んだ人工漁礁
の平面図（Ａ）、右側面図（Ｂ）、正面図（Ｃ）。
【図１０】間伐材と金属板を用いて組み上げた井桁形状の金属板付き木枠内外に水底沈設
部材を組み込んだ人工漁礁の平面図（Ａ）、右側面図（Ｂ）、正面図（Ｃ）。
【図１１】間伐材と金属板の連結部分の拡大断面図。
【図１２】金属板付き木枠の金属板に水底沈設部材を連結した人工漁礁の平面図（Ａ）、
右側面図（Ｂ）、正面図（Ｃ）。
【図１３】金属板付き木枠の金属板と水底沈設部材の連結部分の拡大平面図。
【図１４】水底沈設部材をそれらとは垂直方向に配置した間伐材に連結して井桁状状に組
み上げた人工漁礁の平面図（Ａ）、右側面図（Ｂ）、正面図（Ｃ）。
【符号の説明】
１人工漁礁
２水底沈設部材
３貫通孔
４自然石
５連結部材
６鉤状部材
８係止部材
９間置間伐材
１０間伐材
１３金属板[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to an artificial fish reef sunk on a water bottom such as a river or sea, using a long member and a water bottom sunk member as constituent elements.
[0002]
[Prior art]
Conventionally, artificial reefs have been used to collect seafood and create and expand fishing grounds by artificially forming raised parts on the bottom of rivers and seas to create an environment suitable for the habitat of fish and shellfish. May be Such artificial reefs include, for example, those using concrete blocks formed in a certain shape and those in which waste materials such as steel materials and old tires are assembled into a certain shape.
[0003]
However, the artificial reef using the conventional concrete block as described above has a strong alkalinity on the surface of the concrete, and has a small surface irregularity, so that water plants, seaweeds, algae, etc. are hardly attached, and shellfish and small fish gather. There is a problem that the effect of collecting fish is low because it is difficult. On the other hand, artificial reefs made of waste materials have a problem that they change over time and their appearance is not very good. Furthermore, since these artificial reefs are considerably heavy in weight, they are not easy to transport and install, and are also difficult to move once installed.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above problems, and provides an artificial fish reef that is easy to adhere to aquatic plants, seaweed, algae, etc., has a high effect of collecting fish, has little secular change, and is easy to transport, install and move. This is a technical issue.
[0005]
[Means for Solving the Problems]
Specific means for solving the above technical problem are as follows. In other words, the artificial reef according to claim 1 is a natural stone having a through hole formed around or inside and outside a combination of long members combined into a polygonal shape such as a girder shape, and inserted into the through hole of the natural stone. A connecting member for connecting the natural stone and a hook-like member connected to both ends of the connecting member or a locking member having an outer shape larger than the inner diameter of the through hole.Equipped with thinning material placed between each natural stoneA submerged submersible member is disposed.
[0006]
An artificial reef according to a second aspect is the artificial reef according to the first aspect, wherein the long member is a thinned material.
[0007]
An artificial reef according to a third aspect is the artificial reef according to the first aspect, wherein the long member is a metal member.
[0008]
An artificial reef according to a fourth aspect is the artificial reef according to the second aspect, wherein a metal plate is fixed to a surface of the thinned material.
[0009]
The artificial reef according to claim 5, wherein the long member, a natural stone having a through hole, a connecting member inserted through the through hole of the natural stone to connect the natural stone, and connected to both ends of the connecting member. And a locking member having an outer shape larger than the inner diameter of the through hole.Equipped with thinning material placed between each natural stoneAnd submerged submerged members in a polygonal shape such as a cross-girder shape.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
First, an underwater submerged member 2 constituting an artificial reef 1 according to an embodiment of the present invention will be described with reference to FIGS. The underwater submerged member 2 constituting the artificial reef 1 according to the embodiment of the present invention includes a single or a plurality of natural stones 4 having a through-hole 3 formed therein and a single natural stone 4 inserted through the through-hole 3 of the natural stone 4. Alternatively, the connecting member 5 includes a connecting member 5 for connecting the plurality of natural stones 4 and hook-shaped members 6 connected to both ends of the connecting member 5.
[0012]
As the natural stone 4, a natural rock is used. If the size of the natural stone 4 is too small, it is easy to flow in the flow of water, and if it is too large, it becomes difficult to carry, install, move, etc., and the diameter is about 10 to 80 cm. It is preferred to use However, the size of the natural stone 4 is not necessarily limited to this, and it is possible to select and use an appropriate size according to an installation place, a use, and the like.
[0013]
The shape of the natural stone 4 is not particularly limited, and rocks having various shapes can be used. In addition, since the water-bottom submerged member 2 is used as a part of the artificial reef 1 according to the embodiment of the present invention, rocks having many irregularities on the surface are more preferable because water grasses, seaweeds, and the like are more likely to adhere thereto. One or a plurality of the natural stones 4 are connected to each other, and irregularities are always formed in gaps between the adjacent natural stones 4. Rocks with a smooth surface can also be used.
[0014]
There is no particular limitation on the number of the natural stones 4 to be used per one of the underwater subsidence members 2, and one or more natural stones 4 can be connected according to the length of the connection member 5. However, if the quantity of the natural stones 4 is too large, it is difficult to carry, install and move the natural stones 4 as in the case where the size of the natural stones 4 is too large. It is preferable to connect and use a plurality of the water-bottom submerging members 2 as appropriate according to the conditions. Such connection between the submerged members 2 can be easily performed by using hook-shaped members 6 connected to both ends of the connecting member 5.
[0015]
The through holes 3 are formed in the natural stones 4 respectively. The through hole 3 is provided for inserting the connecting member 5 therein, and has an inner diameter larger than the diameter of the connecting member 4 as a matter of course. The position of the natural stone 4 where the through hole 3 is provided is usually a position passing through the center of the natural stone 4. However, the position at which the through hole 3 is provided is not necessarily limited to this, and the through hole 3 may be formed near the end of the natural stone 4.
[0016]
The connection member 5 is a member that is inserted into the through hole 3 of the natural stone 4 and connects one or a plurality of the natural stones 4. The connecting member 5 is made of a material that is not broken by the weight of the natural stone 4, friction with the natural stone 4, and the like, and is, for example, a long metal rod having a constant diameter, In particular, it is preferable to use a stainless steel bar in consideration of corrosion resistance, impact resistance, and the like. The diameter of the connecting member 5 is preferably about 10 to 30 mm in order to have a certain degree of elasticity and to secure necessary strength. The diameter of the connecting member 5 is not limited to this, and may be an appropriate diameter according to the size and the number of the natural stones 4 to be connected. The length of the connecting member 5 is longer than a length at which the hook-like members 6 can be connected to both ends in a state where all the natural stones 4 to be used are connected. Here, by setting the length of the connecting member 5 to be longer, it is possible to arbitrarily widen the intervals between the natural stones 4 when arranging the submerged-submerged member 2 on the water bottom. . As a result, the gap between the adjacent natural stones 4 becomes variable, so that even if the seabed has irregularities, it can be bent along the irregularities and can be stably installed. .
[0017]
As shown in FIG. 5, a flexible string-shaped connecting member 5 may be used instead of the rod-shaped connecting member 5 described above. In this case, the connecting member 5 is made of a material that is not cut by the weight of the natural stone 4 or the friction with the natural stone 4, and is made of, for example, a metal wire, a chain, or a rope. Etc., and it is particularly preferable to use a stainless steel wire in consideration of corrosion resistance and durability. The diameter of the string-shaped connecting member 5 is set to a diameter capable of appropriately securing a necessary strength according to a material to be used. Further, although not shown, when the string-shaped connecting member 5 is used as described above, it is also possible to adopt a configuration or the like in which the end portion is folded so as to have a ring shape and fixed with a predetermined fastener or the like. .
[0018]
The hook-shaped members 6 are respectively connected to both ends of the connecting member 5. The hook-shaped member 6 prevents the natural stone 4 connected by the connecting member 5 from coming off the end of the connecting member 5, and the underwater submerged member 2 is an artificial fish reef according to the embodiment of the present invention. Since it is used as a part of the first member 1, it is provided to connect the water bottom sunk members 2 to each other. The hook-shaped members 6 are shaped to be hooked to each other, for example, C-shaped or U-shaped. The material of the hook-shaped member 6 is, for example, stainless steel in consideration of corrosion resistance and the like. The connection between the hook-shaped member 6 and the connecting member 5 is configured so that this connection cannot be easily removed. Here, as shown in FIG. 3, a male screw is formed at both ends of the connecting member 5, and a female screw is formed at the connecting portion 7 of the hook-shaped member 6, and they are connected by screwing each other. The method of connecting the hook-like member 6 and the connecting member 5 is not limited to this, and other methods such as welding or fastening using bolts and nuts may be used. is there.
[0019]
As shown in FIG. 6, a locking member 8 having an outer shape larger than the inner diameter of the through hole 3 of the natural stone 4 may be connected to both ends of the connecting member 5 instead of the hook-shaped member 6. . The locking member 8 is provided to prevent the natural stone 4 from coming off the end of the connecting member 5 even when the hook-shaped member 6 is not provided. Therefore, the shape and the material of the locking member 8 are not particularly limited, and may have a shape having an outer shape larger than the inner diameter of the through hole 3 of the natural stone 4 in a direction orthogonal to the length direction of the connecting member 5. Various shapes and materials can be used. Here, as an example, two metal nuts are screwed into male screws formed at both ends of the connecting member 5. Note that, like the hook-shaped member 6, the locking member 8 can be joined by another method such as welding.
[0020]
Further, as shown in FIG. 7 and FIG. 8, the interim thinning material 9 is disposed between the natural stones 4 constituting the underwater subsidence member 2.To. The intermittent thinning material 9 is a member arranged between the natural stones 3 in order to keep the interval between the natural stones 4 constant, and is larger than the diameter of the connecting member 5 connecting the natural stones 4. Use thinned wood components with a large inner diameter. The length of the interim thinned material 9 is not particularly limited, but is usually about half to twice the diameter of the natural stone 4. Further, there is no particular limitation on the number of the thinned thinned materials 9 and the arrangement of the thinned thinned materials 9 is not particularly limited. They are arranged alternately.
[0021]
Next, the artificial reef 1 according to the embodiment of the present invention will be described with reference to FIGS. This artificial reef 1 is constructed by combining and stacking long members in a polygonal shape such as a girder shape or the like, and arranging the above-described water bottom sunk member 2 around the inside or outside thereof and sunk on the water bottom, or A member and the above-mentioned submerged-bottom member are combined in a polygonal shape such as a cross-girder shape, stacked and submerged on the water bottom.
[0022]
The artificial reef 1 according to the first embodiment of the present invention is preferably used mainly in rivers and seas, and as shown in FIG. A plurality of the submerged submerged members 2 are combined with a thinning material 10 in a cross-girder shape, and connected with a connecting tool 11 such as a long bolt or nut to be arranged around or inside or outside a wooden frame 12 stacked. It was sunk on the water floor. At this time, both ends or the other end of the hook-shaped member 6 of the submerged bottom member 2 arranged around the wooden frame 12 or inside and outside may be fixed to the river and the sea bottom.
[0023]
The thinned wood 10 is not particularly limited, but if it is too light or too small, the wooden frame 12 may rise to the sea surface, and if it is too heavy or too large, the wooden frame 12 is transported and installed. It is preferable to use one having a longitudinal direction of about 1 m to 4 m, since movement or the like may be difficult. However, the thinning material 10 is not necessarily limited to the above, and is determined in consideration of an installation place, a use, and a size and a weight of the water bottom submerged member 2 constituting the artificial reef 1 of the present embodiment. Therefore, it is possible to select and use an appropriate size, weight, or the like that does not cause the artificial reef 1 to float on the sea surface and make transport, installation, and movement difficult. Further, the artificial reef 1 according to the present embodiment may use a long member other than the thinning material 10. Further, as shown in FIG. 9, when the water-bottom submerging member 2 is inserted between the thinned materials 10 constituting the wooden frame 12, the underwater submerging member 2 also serves to prevent the wooden frame 12 from being lifted. The reef 1 can be arranged. Such an arrangement can be variously selected.
[0024]
There is no particular limitation on the position and quantity of the water bottom sunk member 2 disposed around the wooden frame 12 or inside and outside, and there is no particular limitation on the quantity of the thinned materials 10 constituting the wooden frame 12. In addition, the thinning materials 10 are assembled in a girder shape, and there is no particular limitation on the number of the stacked materials, and the transport, installation, movement, etc. of the wooden frames 12 in which the stacked materials are stacked may be appropriately stacked according to the shape of a river or sea. good. Further, the connecting tool 11 for connecting the thinned material 10 is not limited to this, and for example, a fixing means such as a screw, a screw, a nail, or an adhesive may be used.
[0025]
In the above-described configuration, the wooden frame 12 has relatively few surface irregularities, so that algae easily adhere, but it is difficult for aquatic plants and seaweed to adhere, and it is difficult for shellfish and small fish to gather. By arranging the water-bottom submerged member 2 inside and outside and around the wooden frame 12, a large number of uneven portions are formed on the artificial reef 1 according to the present embodiment. As a result, abundant aquatic plants and seaweeds adhere to the natural stone 4, and an environment suitable for the habitat of shellfish and small fishes can be obtained, and large fishes can easily gather. The fish collecting effect of the artificial reef 1 can be enhanced.
[0026]
Next, an artificial reef 1 according to a second embodiment of the present invention will be described. The artificial reef 1 is preferably used mainly in rivers and the sea, and although not shown, a metal member is formed in a cross-girder shape instead of the thinning material 10 constituting the wooden frame 12. A single or a plurality of the water bottom sunk members 2 connected in the length direction are arranged around or inside and outside the metal frames stacked by connecting them with the connecting tool 11 and sunk on the water bottom. . The metal member is made of a material that is not broken by friction with the submerged member 2 and is preferably made of stainless steel in consideration of corrosion resistance and impact resistance. It is. In addition, the size of the metal member is not particularly limited, but it is preferable to use a metal member having a longitudinal direction of about 1 m to 4 m because transportation, installation, and movement of the metal frame may be difficult. is there. As described above, the artificial reef 1 according to the present embodiment is such that the thinned material 10 of the artificial reef 1 according to the first embodiment is replaced with the metal member. Since it is the same as the artificial reef 1 according to the embodiment, the description is omitted.
[0027]
In the above-described configuration, the metal frame has relatively few irregularities on the surface, and because it is made of metal, it is difficult for algae, aquatic plants and seaweed to adhere thereto, and shellfish and small fish are difficult to collect. By arranging the water-bottom submerging member 2 inside, outside, or in the periphery, many uneven portions are formed on the artificial reef 1 according to the present embodiment. As a result, abundant algae, seaweed, and the like are attached to the natural stone 4, and an environment suitable for habitat of shellfish and small fishes can be provided, and large fishes can easily gather. The fish collecting effect of the artificial reef 1 can be enhanced. Further, since the artificial reef 1 includes a metal member as a constituent element, the artificial reef 1 has excellent corrosion resistance, impact resistance, and the like.
[0028]
Next, an artificial reef 1 according to a third embodiment of the present invention will be described. This artificial reef 1 is also suitably used mainly in rivers and seas, and as shown in FIGS. 10 and 11, a single water bottom sunk member 2 or a plurality of water bottoms connected in the length direction. The submerging member 2 is combined with a thinning material 15 with a metal plate, in which one or a plurality of metal plates 13 are fixed to one or more surfaces of the thinning material 10 with screws 14 on the thinning material 10 in a cross-girder shape. It is disposed around or inside and outside the wooden frame with a metal plate 16 which is connected and stacked, and is settled on the water floor. That is, in this artificial reef 1, the wooden frame 12 constituting the artificial reef 1 according to the first embodiment of the present invention is replaced with the wooden frame 16 with a metal plate. Therefore, the artificial reef 1 can reduce the buoyancy of the thinned material 10 by fixing the metal plate 13 to the thinned material 10. No. 1 has an effect of not floating on the sea surface. Further, the strength of the thinned material 10 can be improved.
[0029]
As the metal plate 13, a metal plate that is not broken by the weight of the natural stone 4 or friction with the natural stone 4 is used. For example, a long iron plate having a certain length, particularly, corrosion resistance In consideration of the impact resistance and the impact resistance, it is preferable to use a stainless steel plate. The size and the number of the metal plates 13 are not particularly limited, but are preferably slightly smaller than the thinning material 10. Further, the screw 14 fixing the metal plate 13 to the thinned material 10 is not limited to this, and for example, a fixing means such as a screw, a nail, an adhesive or the like may be used. The other parts are the same as those of the artificial reef 1 according to the first embodiment. Therefore, there is no particular limitation on the position and quantity of the water bottom siding member 2.
[0030]
As shown in FIG. 12, the artificial reef 1 includes a single submerged member 2 or a plurality of submerged members 2 connected in a longitudinal direction. It may be connected to and settled on the water floor. At this time, there is no particular limitation on the position and the number of the submerged submersible members 2 connected to the metal frame 16 with a metal plate. It is preferable that the number of the water bottom sunk members 2 is one to three.
[0031]
The means for connecting the metal plate 13 and the submerged member 2 is not particularly limited, but may be hooked to each other. Here, as shown in FIG. 13, a laser or the like is used to cut three sides of a rectangular shape having an arbitrary size at an arbitrary position of the metal plate 13 and bend the remaining one side as an axis to form a hook. The hook-shaped member 6 at the other end of the submerged bottom member 2 is hooked on the hook, and the submerged bottom member 2 is attached to the metal plate 13 so that the hook and the submerged bottom member 2 do not come off again by turning back. Interconnected as if hanging. Further, here, the water bottom sunk member 2 is connected to the metal plate 13. They may be connected. The other parts are the same as those of the artificial reef 1 according to the first embodiment.
[0032]
In the above-described configuration, since the wooden frame 16 with a metal plate has relatively few surface irregularities and the metal plate 13 is a constituent element, it is difficult for aquatic plants and seaweed to adhere to the wooden frame 16 with a metal plate. Although it is difficult for shellfishes and small fishes to collect, in this way, by arranging the water bottom sunk member 2 inside or outside or around the metal frame 16 with the metal plate, the artificial reef 1 according to the present embodiment Many irregularities are formed. As a result, abundant algae, seaweed, and the like are attached to the natural stone 4, and an environment suitable for habitat of shellfish and small fishes can be provided, and large fishes can easily gather. The fish collecting effect of the artificial reef 1 can be enhanced.
[0033]
Next, an artificial reef 1 according to a fourth embodiment of the present invention will be described. This artificial reef 1 is also preferably used mainly in rivers and the sea, and as shown in FIG. 14, a single water bottom sunk member 2 or a plurality of the water bottom sunk members 2 connected in a longitudinal direction. And one or a plurality of the thinning materials 10 arranged in the vertical direction are combined in a cross-girder shape, and they are connected by the connecting tool 11, stacked, and settled on the bottom of the water. Here, the thinned material 10 is used for a long member, but the present invention is not limited to this. For example, the thinned material may be the metal member. Further, in this case, the combination angle of the submerged member 2 and the thinned material 10 which is a long member is 90 degrees, but is not limited thereto, and may be, for example, 45 degrees. The submerged submerged member 2 has a configuration in which the thinned wood members 9 having through holes formed between the natural stones 4 are alternately arranged with the natural stones 4. The thinned wood 9 may be arranged. There is no particular limitation on the means for connecting the water bottom siding member 2 and the thinned material 10. Here, the thinned material 9 and the thinned material 10 are connected by the connecting tool 11. Further, in place of the thinned material 10, the thinned material 15 with the metal member and the metal plate may be used. In other words, the artificial reef 1 uses the wooden frame 12, the metal frame and the thinned material 10, which constitutes the metal frame 16 with the metal plate, the metal member or a part of the thinned material 15 with the metal plate as the water bottom. It has a configuration in which the submersion member 2 is replaced.
[0034]
There is no particular limitation on the intermittent thinning material 9, but a size equivalent to the natural stone 4 is preferable, and the quantity of the intermittent thinning material 9 is the same as that of the natural stone 4. The interval is not particularly limited. Further, here, the locking members 8 are used at both ends of the connecting member 5 to prevent the natural stone 4 and the interim thinned material 9 from coming off from the end of the connecting member 5, The locking member 8 may be the hook-shaped member 6.
[0035]
In the above-described configuration, the thinning material 10 has relatively little unevenness on the surface, so that it is difficult for aquatic plants and seaweeds to adhere thereto, and shells and small fish are difficult to collect. By arranging the member 2, many uneven portions are formed on the artificial reef 1 according to the present embodiment. As a result, abundant algae, seaweed, and the like are attached to the natural stone 4, and an environment suitable for habitat of shellfish and small fishes can be provided, and large fishes can easily gather. The fish collecting effect of the artificial reef 1 can be enhanced. In addition, since the thinning material 10 and the water bottom siding member 2 are stacked in combination, they are excellent in miniaturization and weight reduction, and can be easily installed even on a shallow and narrow seawater bottom or the like. Furthermore, even when the seabed on which the artificial reef 1 according to the present embodiment is installed has irregularities, the connecting member 5 constituting the submerged-submerged member 2 has a certain degree of elasticity. The entire artificial reef 1 is bent according to the unevenness of the artificial reef 1. Therefore, artificial reef 1 according to the present embodiment can be stably installed.
[0036]
As described above, the artificial reef 1 according to the first, second, third, fourth, and fifth embodiments of the present invention has been described, and at least one of the thinning material 10, the metal member, and the metal plate 13 is provided. Any structure may be used as long as it is an artificial reef 1 configured using the above and the above-described submerged member 2.No.
[0037]
【The invention's effect】
The effects of the present invention are summarized as follows. According to the artificial reef according to claim 1 of the present invention, since it has a configuration in which the long members are combined in a polygonal shape and stacked, the shape of the girder shape or the triangular shape is adjusted according to the environment in the seawater to be installed. Since it can be combined with a required shape and the number of stages to be stacked on the upper part can be appropriately stacked as needed, an artificial reef of an arbitrary required shape can be easily formed. In addition, since each component is relatively inexpensive and light in weight, transportation, installation, movement, and the like can be easily performed. Furthermore, when a large number of irregularities are formed on the surface of natural stones and between natural stones, waterweeds, seaweeds, algae, etc. can easily adhere to them, so that the effect of collecting fish can be high. Even so, the scenery is not spoiled.In addition, the length and shape of the submerged submerged members are controlled by using a submerged submerged member that can maintain a constant spacing between the natural stones by placing thinning materials between each natural stone. Therefore, the size and shape of the artificial reef can be easily adjusted. Furthermore, since thinned wood is easy to adhere to algae, it is arranged alternately with natural stones to which aquatic plants and seaweeds are easily attached, so that both the aquatic plants and seaweeds and algae can be suitably attached as a whole of the submerged submerged member. Therefore, an artificial reef that can collect various fish and shellfish can be easily installed.
[0038]
According to the artificial reef according to claim 2 of the present invention, in addition to the effect of the artificial reef according to claim 1 of the present invention, since the thinning material is used as a component, the raw material is inexpensive and the weight is relatively light. Because of good workability, various artificial reefs can be easily manufactured. Also, since algae are more likely to adhere than conventional concrete or metal products, it is more suitable for fishing reefs.
[0039]
According to the artificial reef according to claim 3 of the present invention, in addition to the effect of the artificial reef according to claim 1 of the present invention, since the metal member is a component of the artificial reef, corrosion resistance and impact resistance are improved. It is excellent in properties and the like, and can be used for a long time because of little change over time.
[0040]
According to the artificial reef according to claim 4 of the present invention, in addition to the effect of the artificial reef according to claim 1 of the present invention, since the metal plate is a component of the artificial reef, the artificial reef is configured. The buoyancy of the thinned timber can be reduced, so that even if the thinned timber or the screws connecting the thinned timber with a metal plate are corroded, the artificial reef does not float on the sea surface.
[0041]
According to the artificial reef according to the fifth aspect of the present invention, in addition to the effects of the artificial reef according to the first, second, third and fourth aspects of the present invention, the long member and the water-bottom submerged member are formed into a girder shape. It is excellent in miniaturization, weight reduction, etc., and can be easily installed even on a shallow, narrow seabed or the like. In addition, since the connecting member that constitutes the submerged bottom member has a certain degree of elasticity, even if there is unevenness in the seabed, the entire artificial reef will bend accordingly, and it will adapt to the seabed and be stable Can be installed in
[0042]
According to the artificial reef according to claim 6 of the present invention, in addition to the effects of the artificial reef according to claims 1, 2, 3, 4 and 5 of the present invention, thinning materials are arranged between the natural stones. Since the submerged submersible member that can keep the distance between each natural stone constant is a component of the artificial reef, the length and shape of the submerged submerged member can be easily adjusted, and therefore, the artificial reef The size and shape can be easily adjusted. Furthermore, since thinned wood is easy to adhere to algae, it is arranged alternately with natural stones to which aquatic plants and seaweeds are easily attached, so that both the aquatic plants and seaweeds and algae can be suitably attached as a whole of the submerged submerged member Therefore, an artificial reef that can collect various fish and shellfish can be easily installed.
[Brief description of the drawings]
FIG. 1 is a plan view showing a water-bottom submerged member using a plurality of natural stones.
FIG. 2 is a sectional view of FIG.
FIG. 3 is a plan view showing a submerged member using a single natural stone.
FIG. 4 is a sectional view of FIG. 3;
FIG. 5 is a cross-sectional view of a submerged member using a flexible string-shaped connecting member.
FIG. 6 is a sectional view of a submerged member using a locking member.
FIG. 7 is a plan view of an underwater submerged member in which interleaved thinning materials are arranged between natural stones.
FIG. 8 is a sectional view of FIG. 7;
Fig. 9 Artificial reef that incorporates a submerged submerged member inside and outside a wooden girder-shaped wooden frame with thinned wood
(A), right side view (B), front view (C).
Fig. 10 Submersion in and out of a wooden frame with a girder-shaped metal plate assembled using thinned wood and metal plate
A plan view (A), a right side view (B), and a front view (C) of an artificial reef incorporating members.
FIG. 11 is an enlarged sectional view of a connection portion between a thinned material and a metal plate.
FIG. 12 is a plan view (A) of an artificial reef in which a submerged member is connected to a metal plate of a wooden frame with a metal plate;
Right side view (B), front view (C).
FIG. 13 is an enlarged plan view of a connecting portion between a metal plate of a wooden frame with a metal plate and a water bottom siding member.
FIG. 14 is a diagram of connecting a submerged submerged member to a thinning material arranged vertically with respect to the submerged member to form a girder shape.
The plan view (A), the right side view (B), and the front view (C) of the artificial reef viewed.
[Explanation of symbols]
1 artificial reef
2 Submersible submerged members
3 Through-hole
4 natural stones
5 Connecting members
6 Hook-shaped member
8 Locking member
9 thinned timber
10 Thinned wood
13 Metal plate

Claims

Along the periphery or inside and outside of a combination of long members combined into a polygonal shape such as a girder shape or the like, a natural stone having a through hole, a connecting member which is inserted into the through hole of the natural stone and connects the natural stone, and A hook-like member or a locking member having an outer shape larger than the inner diameter of the through-hole connected to both ends of the connecting member , and a submerged member provided with a thinning material disposed between natural stones. An artificial reef characterized by being placed.

The artificial reef according to claim 1, wherein the long member is a thinned wood.

The artificial fishing reef according to claim 1, wherein the long member is a metal member.

The artificial reef according to claim 2, wherein a metal plate is fixed to a surface of the thinned wood.

A long member, a natural stone having a through hole, a connecting member inserted through the natural stone through hole to connect the natural stone, and a hook-like member connected to both ends of the connecting member or an inner diameter of the through hole A locking member having a larger outer shape , and being combined and stacked in a polygonal shape such as a girder shape using a submerged member having a thinning material disposed between each natural stone. Artificial reef