JP3723918B2 - Algae-proof cover and its extension device - Google Patents

Algae-proof cover and its extension device Download PDF

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Publication number
JP3723918B2
JP3723918B2 JP27643095A JP27643095A JP3723918B2 JP 3723918 B2 JP3723918 B2 JP 3723918B2 JP 27643095 A JP27643095 A JP 27643095A JP 27643095 A JP27643095 A JP 27643095A JP 3723918 B2 JP3723918 B2 JP 3723918B2
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JP
Japan
Prior art keywords
algae
proof cover
cover
opening
proof
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JP27643095A
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Japanese (ja)
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JPH0994563A (en
Inventor
重俊 大滝
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Takiron Co Ltd
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Takiron Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、水処理層を防藻するためのカバーと、そのカバーを水処理層の開口を覆う形に展張するための装置に関する。
【0002】
【従来の技術】
川水などを浄化して飲用に供することなどのための設備である水処理設備の沈砂池で藻が発生することを防止する方法として、従来より、塩素や次亜塩素酸ソーダなどの薬品を投入することが行われている。しかし、沈砂池に薬品を投入することは、処理水が飲用などに供されることを勘案すると好ましいことではない。そこで、沈砂池の開口を合成樹脂製の遮光蓋で覆うことによって遮光による防藻を行う場合がある。
【0003】
【発明が解決しようとする課題】
ところで、沈砂池の開口は、その縦横長さが15×10mといった大きな長方形になっているものも多いので、そのように大きな開口の沈砂池に対しては、その開口の大きさに見合う大形の遮光蓋を用いる必要がある。
【0004】
しかしながら、大形の合成樹脂製の遮光蓋はコストが高い割に取扱性に欠け、また、木の葉などを取り除くときなどのメンテナンスも煩わしいという問題があった。
【0005】
本発明はこの問題に鑑みてなされたものであり、安価で取扱性にも優れ、メンテナンスも容易な防藻用カバーを提供することを目的とする。
【0006】
また、本発明は、そのような防藻用カバーで水処理槽の開口を覆ったり、水処理槽の開口を覆っている防藻用カバーを取り外すときに用いられる防藻用カバーの展張装置を提供することを目的とする。
【0007】
【課題を解決するための手段】
本発明に係る防藻用カバーは、水処理槽の開口を縦断する長さを有し、巻取り繰出しが可能な可撓性を有する透水性の合成樹脂製長尺遮光ネットでなる、というものである。上記長尺遮光ネットとしては、合成樹脂製の撚り糸でなる縦糸と横糸とを有しかつ撚り糸とは異なる樹類の合成樹脂でコート処理した織物でなるものを採用することが可能であり、その際に、撚り糸をポリエチレン樹脂繊維とし、コート処理をポリ塩化ビニル樹脂で行うことが可能である。また、上記長尺遮光ネットの透水性を、横糸の相互間に通水可能な隙間を形成することによって確保することが可能である。防藻用カバーの遮光率は70〜90%であることが望ましい。さらに、防藻用カバーは、長手方向の一端部に引紐が連結されていることが望ましい。
【0008】
このように構成された防藻用カバーは、横糸の相互間に形成された隙間が通水孔として機能するので、その隙間によって透水性を持つことになる。したがって、この防藻用カバーで水処理層の開口を覆うと、雨水が上記隙間を通過するので、雨水の重みで防藻用カバーが垂れ下がったりすることが抑制される。また、この防藻用カバーは、巻取り繰出しが可能な可撓性を有しているので、木の葉などがその上に落ちているときには、防藻用カバーを巻き取ることと併行して取り除くことが可能である。
【0009】
防藻用カバーを形成している長尺遮光ネットが、ポリエチレン樹脂繊維の撚り糸でなる縦糸と横糸とを有しかつポリ塩化ビニル樹脂でコート処理した織物でなるものでは、大きな強度と耐久性が発揮される。
【0010】
また、当該防藻用カードの遮光率が70〜90%であると、屋外の水処理層における防藻作用が満足のいく程度に発揮されるばかりでなく、雨水が速やかに防藻用カバーの上記隙間を通過する。遮光率が70%より小さいと、防藻作用が十分に発揮されなくなるおそれがあり、遮光率が90%より大きいと、雨水が防藻用カバーの上に溜まって防藻用カバーが垂れ下がるおそれがある。
【0011】
本発明に係る防藻用カバーの展張装置は、防藻用カバーを巻取り繰出し可能な巻取り機構と、水処理槽の開口を横断して配備された上下のローラの相互間に上記防藻用カバーが挿通される複数のガイド部材と、を備える、というものである。
【0012】
この構成の展張装置によると、巻取り機構を用いて長尺の防藻用カバーを容易に巻き取ったり繰出したりすることができる。そして、ガイド部材を形成している上下のローラは、水処理槽の開口の上で巻取り機構から繰り出された防藻用カバーをガイドしてその繰出し経路を形成することに役立ち、また、上側のローラは、展張された防藻用カバーが風に煽られたときに定位置に保持することに役立ち、下側のローラは、展張された防藻用カバーが垂れ下がることを防ぐことに役立つ。
【0013】
【発明の実施の形態】
図1は本発明の実施の一形態である防藻用カバーAの使用状態を示す概略平面図、図2は防藻用カバーAに用いられている長尺遮光ネット1の部分平面図、図3はガイド部材6の作用を示す部分斜視図、図4は巻取り機構5の概略斜視図である。
【0014】
防藻用カバーAは、巻取り繰出しが可能な可撓性を有する透水性の合成樹脂製長尺遮光ネット1でなる。図2のように、長尺遮光ネット1は、ポリエチレン樹脂繊維の撚り糸でなる縦糸11と横糸12とを有する織物によって形成されており、しかもその織物はポリ塩化ビニル樹脂でコート処理されている。このため、長尺遮光ネット1は、引張強度に優れ、屈曲しにくく、ロール状に巻き取ったり繰り出したりすることが可能な可撓性を備え、耐水性や耐候性などの屋外使用時の耐久性にも優れている。この長尺遮光ネット1の横糸12…の相互間に通水可能な隙間S…が形成されている。したがって、この隙間Sにより長尺遮光ネット1に透水性が付与されている。
【0015】
また、図3に示すように、長尺遮光ネット1の幅方向の両側縁部は細かな織り目を有する縁取り部13に形成されており、さらに、図1に示すように、長尺遮光ネット1の先端部も細かな織り目を有する先端片部14に形成されている。
【0016】
図1において、2は水処理槽の一例である沈砂池の開口を示している。同図で判るように、この開口2は長方形であり、短辺が15m程度、長辺が30m程度の長さを有している。そして、上記防藻用カバーAは、その長さが開口2の長辺よりも長く、その幅が開口2の短辺の半分程度の長さになっている。したがって、同図のように、展張した2枚の防藻用カバーA,Aを開口2の短辺に沿う方向に並べると、開口2を縦断するそれらの防藻用カバーA,Aによって開口1が覆われる。
【0017】
開口2を防藻用カバーA,Aによって覆っておくと、沈砂池の中が防藻用カバーA,Aによって遮光されるので、藻が発生しにくくなる。防藻用カバーA,Aの遮光機能は、長尺遮光ネット1の縦糸11と横糸12とによって発揮される。この意味で、長尺遮光ネット1は黒色に着色されていることが望ましい。他方、横糸12…の相互間の隙間Sによって雨水通過機能が発揮される。遮光率は70〜90%であることが望ましい。遮光率が70〜90%であると、防藻作用が満足のいく程度に発揮されるばかりでなく、雨水が速やかに上記隙間Sを通過する。遮光率が70%より小さいと、防藻作用が十分に発揮されなくなるおそれがあり、遮光率が90%より大きいと、雨水が防藻用カバーの上に溜まって防藻用カバーが垂れ下がるおそれがある。なお、雨水は、2枚の防藻用カバーA,Aの間の隙間を主に通過する。
【0018】
この実施形態では、長尺遮光ネット1の縦糸11や横糸12がポリエチレン樹脂繊維の撚り糸で形成されているけれども、これを他の合成樹脂、たとえばポリ塩化ビニル樹脂で形成してもよく、その際には必ずしも撚り糸にする必要はない。また、長尺遮光ネット1を形成している織物は、必ずしもポリ塩化ビニル樹脂でコート処理されている必要はない。
【0019】
図1のように、防藻用カバーAの先端片部14には孔15があり、この孔15に引紐3が連結されている。この引紐3は、防藻用カバーAを展張するときに利用される。引紐3は、図例のように上記先端片部14の中央に一本だけ設ける以外に、防藻用カバーの先端縁の幅方向両端部に合計で2本を連結しておいても、幅方向中央部と幅方向両端部に合計で3本を連結しておいてもよく、引紐3の本数は必要に応じて適宜選択すべきである。このように引紐3の数を変えることによって、長尺遮光ネット1を後述するガイド部材6の上下のローラ65,66の間に通しやすくしたり、長尺遮光ネット1が片引きされるのを防ぐことができる。
【0020】
次に、上記した防藻カバーAの展張装置を説明する。この展張装置は、図4に示した巻取り機構5と、図1や図3に示した沈砂池の開口2を横断して配備されたガイド部材6とでなる。
【0021】
図例の巻取り機構5は、骨組み状の架台51にリール52を回転自在に支持させ、そのリール52に回転操作用のハンドル53を取り付けたものであり、架台51には移動が容易になるようにキャスター54を取り付けてある。ガイド部材6は、ステンレス製のワイヤ61,62のそれぞれに合成樹脂パイプ(たとえは塩化ビニルバイプ)63,64を回転自在に外嵌してなる上下のローラ65,66を備えており、上記ワイヤ61,62のそれぞれの両端部が、沈砂池の周囲壁21に固着したブラケット7,7にフック71,71を介して連結されている。フック71,71はターンバックル形式のものであり、ワイヤ61,62の張力を調節する機能を持っている。このようなガイド部材6は、図1のように沈砂池の開口2の長手方向に所定間隔を隔てて複数設置されている。
【0022】
この構成の展張装置において、巻取り機構5のリール52には防藻用カバーAをロール状に巻き取ることが可能である。防藻用カバーAの巻取りはハンドル53を回転操作してリール52を巻取り方向に回転させることによって行われる。また、巻き取った防藻用カバーAは、上記した引紐3を引っ張ることによって繰り出され、そのときには、リール52が防藻用カバーAの繰出しに伴って繰出し方向に回転する。
【0023】
防藻用カバーAで沈砂池の開口2を覆わせるときには、沈砂池の開口2の傍に巻取り機5を搬入し、その巻取り機5に巻き取っている防藻カバーAの引紐3と長尺遮光ネット1とをガイド部材6の上下のローラ65,66の間を通して引き出す。こうして巻取り機5から防藻用カバーAを繰り出して展張すると、防藻用カバーAが図1のように沈砂池の開口2を覆う。
【0024】
沈砂池の開口2を覆っている防藻用カバーAが風で煽られたときには、複数のガイド部材6の上側のローラ65がその防藻用カバーAを複数箇所で押さえてその防藻用カバーAを定位置に保持する。また、防藻用カバーAの垂れ下がりは、下側のローラ66がその防藻用カバーAを複数箇所で支持しているので防止される。
【0025】
沈砂池の開口2を覆っている防藻用カバーAを巻き取るときは、巻き取るべき防藻用カバーAのところに巻取り機5を搬入し、そこで長尺遮光ネット1の基端部をリール52に取り付けた後、ハンドル53を回すとよい。このときに、防藻用カバーAの上に落ちている木の葉などを取り除くことが可能である。
【0026】
本発明において、長尺遮光ネットの構成は図例に限定されない。たとえば、長尺の合成樹脂製遮光シートに多数の通水孔を開設した構成にすることも可能である。また、水処理槽としては沈砂池以外の浄化水槽なども含まれる。
【0027】
【発明の効果】
本発明に係る防藻用カバーは、水処理槽の開口を縦断する長さを有し、巻取り繰出しが可能な可撓性を有する透水性の合成樹脂製長尺遮光ネットでなり、長尺遮光ネットとしては、合成樹脂製の横糸の相互間に通水可能な隙間が形成された織物や、それをポリ塩化ビニル樹脂でコート処理した織物を採用することができるので、従来の大形遮光蓋に比べて安価であるにもかかわらず、強度や耐久性に優れ、しかも取扱性に優れる。また、長尺遮光ネットの長さや幅を、水処理層の開口の長さや幅に合わせて任意に定めることができるという利点がある。
【0028】
さらに、防藻用カバーの長手方向の一端部に引紐を連結しておくと、その防藻用カバーを展張しやすくなるという効果がある。
【0029】
本発明に係る防藻用カバーの展張装置によると、長尺の防藻用カバーを容易に巻き取ったり繰出したりすることができ、また、展張された防藻用カバーが風に煽られて吹き上げられるといった事態や、展張された防藻用カバーが垂れ下がるといった事態が起こらなくなるという効果がある。
【図面の簡単な説明】
【図1】本発明の実施の一形態である防藻用カバーの使用状態を示す概略平面図である。
【図2】防藻用カバーに用いられている長尺遮光ネットの部分平面図である。
【図3】ガイド部材の作用を示す部分斜視図である。
【図4】巻取り機構の概略斜視図である。
【符号の説明】
A 防藻用カバー
1 長尺遮光ネット
2 水処理槽の開口
5 巻取り機構
6 ガイド部材
11 縦糸
12 横糸
65,66 ローラ
S 隙間
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cover for preventing algae from water treatment and an apparatus for spreading the cover so as to cover the opening of the water treatment layer.
[0002]
[Prior art]
Conventionally, chemicals such as chlorine and sodium hypochlorite have been used as a method to prevent the generation of algae in a sand basin of a water treatment facility, which is a facility for purifying river water and making it available for drinking. It has been done. However, it is not preferable to add chemicals to the sand basin in view of the fact that the treated water is used for drinking. Therefore, there is a case where algae is protected by shading by covering the opening of the sand basin with a light shielding lid made of synthetic resin.
[0003]
[Problems to be solved by the invention]
By the way, the opening of the sand basin is often a large rectangle with a vertical and horizontal length of 15 × 10 m. For such a sand basin with a large opening, a large size corresponding to the size of the opening. It is necessary to use a light shielding lid.
[0004]
However, the large-sized light shielding lid made of synthetic resin has a problem that it is not easy to handle at a high cost, and maintenance such as removing leaves is troublesome.
[0005]
The present invention has been made in view of this problem, and an object thereof is to provide an algae-proof cover that is inexpensive, excellent in handleability, and easy to maintain.
[0006]
Further, the present invention provides an apparatus for extending an algae-proof cover that is used when covering the opening of a water treatment tank with such an algae-proof cover or removing the algae-proof cover covering the opening of the water-treatment tank. The purpose is to provide.
[0007]
[Means for Solving the Problems]
The algae-proof cover according to the present invention has a length that cuts through the opening of the water treatment tank and is made of a flexible light-permeable synthetic resin long shading net that can be rolled out. It is. As the above-mentioned long shading net, it is possible to adopt a fabric made of a woven fabric having a warp yarn and a weft yarn made of a synthetic resin twist yarn and coated with a synthetic resin of a tree different from the twist yarn, In this case, the twisted yarn can be made of polyethylene resin fiber, and the coating treatment can be performed with polyvinyl chloride resin. Moreover, it is possible to ensure the water permeability of the long light-shielding net by forming a gap that allows water to pass between the weft yarns. The light shielding rate of the algae-proof cover is preferably 70 to 90%. Furthermore, it is desirable for the algae-proof cover to have a drawstring connected to one end in the longitudinal direction.
[0008]
The algae-proof cover configured as described above has water permeability through the gap because the gap formed between the wefts functions as a water passage hole. Therefore, when the opening of the water treatment layer is covered with the algae-proof cover, rainwater passes through the gap, so that the algae-proof cover is prevented from drooping due to the weight of rainwater. In addition, this algae-proof cover is flexible so that it can be rolled out, so when the leaves of trees fall on it, remove it in parallel with winding the algae-proof cover. Is possible.
[0009]
If the long shading net forming the algae-proof cover is made of a woven fabric having warps and wefts made of twisted polyethylene resin fibers and coated with a polyvinyl chloride resin, it has great strength and durability. Demonstrated.
[0010]
Moreover, when the light shielding rate of the card for anti-algae is 70 to 90%, not only the anti-algae action in the outdoor water treatment layer is exhibited to a satisfactory level, but also rainwater quickly Pass through the gap. If the shading rate is less than 70%, the algae preventing effect may not be sufficiently exhibited. If the shading rate is greater than 90%, rainwater may accumulate on the algae cover and the algae cover may hang down. is there.
[0011]
An apparatus for extending an algae-proof cover according to the present invention includes a winding mechanism capable of winding and feeding out the algae-proof cover and the above-mentioned algae-proof between upper and lower rollers disposed across an opening of a water treatment tank. And a plurality of guide members through which the cover is inserted.
[0012]
According to the extending device having this configuration, the long algae-proof cover can be easily wound up and fed out using the winding mechanism. The upper and lower rollers forming the guide member serve to guide the algae cover fed from the winding mechanism over the opening of the water treatment tank to form the feeding path, and The roller serves to hold the stretched algae cover in place when winded, and the lower roller helps prevent the spread algae cover from sagging.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic plan view showing a use state of an algae-proof cover A according to an embodiment of the present invention. FIG. 2 is a partial plan view of a long shading net 1 used for the algae-proof cover A. FIG. 3 is a partial perspective view showing the operation of the guide member 6, and FIG. 4 is a schematic perspective view of the winding mechanism 5.
[0014]
The algae-proof cover A is made of a flexible light-permeable synthetic resin long shading net 1 that can be rolled out. As shown in FIG. 2, the long shading net 1 is formed of a woven fabric having warp yarns 11 and weft yarns 12 made of twisted polyethylene resin fibers, and the woven fabric is coated with a polyvinyl chloride resin. For this reason, the long light-shielding net 1 has excellent tensile strength, is not easily bent, is flexible enough to be wound up and fed out in a roll shape, and is durable when used outdoors such as water resistance and weather resistance. Also excellent in properties. A gap S is formed between the weft yarns 12 of the long shading net 1 so that water can pass therethrough. Therefore, the gap S provides water permeability to the long shading net 1.
[0015]
Moreover, as shown in FIG. 3, the both-sides edge part of the width direction of the elongate light-shielding net | network 1 is formed in the edge part 13 which has a fine texture, Furthermore, as shown in FIG. Is also formed at the tip piece 14 having a fine texture.
[0016]
In FIG. 1, 2 has shown the opening of the sand basin which is an example of a water treatment tank. As can be seen in the figure, the opening 2 is rectangular and has a short side of about 15 m and a long side of about 30 m. The algae-proof cover A has a length that is longer than the long side of the opening 2 and a width that is about half the short side of the opening 2. Therefore, as shown in the figure, when the two spread algae-proof covers A, A are arranged in the direction along the short side of the opening 2, the opening 1 is formed by the algae-proof covers A, A that vertically cut through the opening 2. Is covered.
[0017]
If the opening 2 is covered with the algae-proof covers A and A, the inside of the sand basin is shielded from light by the algae-proof covers A and A, so that algae are less likely to be generated. The light shielding function of the algae-proof covers A, A is exhibited by the warp yarn 11 and the weft yarn 12 of the long light-shielding net 1. In this sense, the long shading net 1 is preferably colored black. On the other hand, the rainwater passing function is exhibited by the gap S between the wefts 12. The light shielding rate is desirably 70 to 90%. When the light blocking ratio is 70 to 90%, not only the anti-algae action is satisfactorily exhibited, but also rainwater passes through the gap S quickly. If the shading rate is less than 70%, the algae preventing effect may not be sufficiently exhibited. If the shading rate is greater than 90%, rainwater may accumulate on the algae cover and the algae cover may hang down. is there. In addition, rainwater mainly passes through the gap between the two algae-proof covers A, A.
[0018]
In this embodiment, the warp yarn 11 and the weft yarn 12 of the long light-shielding net 1 are formed of a twisted yarn of polyethylene resin fiber, but this may be formed of another synthetic resin, for example, a polyvinyl chloride resin. It is not always necessary to use a twisted yarn. In addition, the fabric forming the long light-shielding net 1 does not necessarily have to be coated with a polyvinyl chloride resin.
[0019]
As shown in FIG. 1, the tip piece 14 of the alga-proof cover A has a hole 15, and the drawstring 3 is connected to the hole 15. This drawstring 3 is used when the algae-proof cover A is extended. In addition to providing only one pull string 3 at the center of the tip piece portion 14 as shown in the figure, the pull string 3 may be connected to a total of two ends in the width direction of the tip edge of the algae cover. Three in total may be connected to the center in the direction and both ends in the width direction, and the number of drawstrings 3 should be selected as appropriate. By changing the number of the pull cords 3 in this way, the long light-shielding net 1 can be easily passed between the upper and lower rollers 65 and 66 of the guide member 6 described later, or the long light-shielding net 1 can be separated. Can be prevented.
[0020]
Next, the expansion device for the above-mentioned alga-proof cover A will be described. This extension device includes a winding mechanism 5 shown in FIG. 4 and a guide member 6 arranged across the opening 2 of the sand basin shown in FIGS. 1 and 3.
[0021]
In the illustrated winding mechanism 5, a reel 52 is rotatably supported on a frame-like gantry 51, and a handle 53 for rotating operation is attached to the reel 52, and the gantry 51 can be easily moved. A caster 54 is attached as described above. The guide member 6 is provided with upper and lower rollers 65 and 66 in which synthetic resin pipes (for example, vinyl chloride vipes) 63 and 64 are rotatably fitted to stainless steel wires 61 and 62, respectively. , 62 are connected to brackets 7, 7 fixed to the surrounding wall 21 of the sand basin via hooks 71, 71, respectively. The hooks 71 and 71 are of the turnbuckle type and have a function of adjusting the tension of the wires 61 and 62. A plurality of such guide members 6 are installed at a predetermined interval in the longitudinal direction of the opening 2 of the sand basin as shown in FIG.
[0022]
In the spreading device having this configuration, the algae-proof cover A can be wound around the reel 52 of the winding mechanism 5 in a roll shape. Winding of the anti-algae cover A is performed by rotating the handle 53 to rotate the reel 52 in the winding direction. The wound anti-algae cover A is unwound by pulling the above-described drawstring 3, and at that time, the reel 52 rotates in the unwinding direction as the anti-algae cover A is unwound.
[0023]
When the opening 2 of the sand basin is covered with the cover 2 for the algae, the winder 5 is carried near the opening 2 of the sand basin, and the drawstring 3 of the seaweed cover A wound around the winder 5 The long shading net 1 is pulled out between the upper and lower rollers 65 and 66 of the guide member 6. Thus, when the anti-algae cover A is unwound from the winder 5 and spreads, the anti-algae cover A covers the opening 2 of the sand basin as shown in FIG.
[0024]
When the algae-proof cover A covering the opening 2 of the sand basin is blown by the wind, the upper rollers 65 of the plurality of guide members 6 hold down the algae-proof cover A at a plurality of locations and the algae-proof cover Hold A in place. Further, the sagging of the algae-proof cover A is prevented because the lower roller 66 supports the algae-proof cover A at a plurality of locations.
[0025]
When winding the algae-proof cover A covering the opening 2 of the sand basin, the winder 5 is carried into the algae-proof cover A to be wound, and the base end of the long shading net 1 is moved there. After attaching to the reel 52, the handle 53 may be turned. At this time, it is possible to remove leaves and the like that have fallen on the algae-proof cover A.
[0026]
In the present invention, the configuration of the long shading net is not limited to the illustrated example. For example, it is possible to adopt a configuration in which a large number of water passage holes are opened in a long synthetic resin-made light shielding sheet. The water treatment tank includes a purified water tank other than the sand basin.
[0027]
【The invention's effect】
The algae-proof cover according to the present invention has a length that cuts through the opening of the water treatment tank, and is a flexible water-permeable synthetic resin long shading net that can be rolled out. As the light-shielding net, we can use woven fabrics with gaps that allow water to pass between the weft yarns made of synthetic resin, or fabrics that have been coated with polyvinyl chloride resin. Despite being cheaper than a lid, it is excellent in strength and durability, and is easy to handle. Further, there is an advantage that the length and width of the long shading net can be arbitrarily determined according to the length and width of the opening of the water treatment layer.
[0028]
Furthermore, when a drawstring is connected to one end portion in the longitudinal direction of the algae-proof cover, there is an effect that the algae-proof cover can be easily spread.
[0029]
According to the device for extending an algae-proof cover according to the present invention, a long algae-proof cover can be easily taken up and fed out, and the extended algae-proof cover is blown up by being blown by the wind. There is an effect that the situation such as being drowned and the situation that the extended anti-algae cover hangs down does not occur.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing a usage state of an algae-proof cover according to an embodiment of the present invention.
FIG. 2 is a partial plan view of a long shading net used for an alga-proof cover.
FIG. 3 is a partial perspective view showing the operation of the guide member.
FIG. 4 is a schematic perspective view of a winding mechanism.
[Explanation of symbols]
A Algae-proof cover 1 Long shading net 2 Water treatment tank opening 5 Winding mechanism 6 Guide member 11 Warp thread 12 Weft thread 65, 66 Roller S Clearance

Claims (6)

水処理槽の開口を縦断する長さを有し、巻取り繰出しが可能な可撓性を有する透水性の合成樹脂製長尺遮光ネットでなることを特徴とする防藻用カバー。An algae-proof cover having a length that cuts through the opening of a water treatment tank and is made of a long, light-permeable synthetic resin light-shielding net that can be rolled out. 長尺遮光ネットは、合成樹脂製の撚り糸でなる縦糸と横糸とを有しかつ撚り糸とは異なる類の合成樹脂でコート処理した織物でなり、横糸の相互間に通水可能な隙間が形成されている請求項1に記載の防藻用カバー。Elongated shielding net, and a warp and weft made of a synthetic resin strands and made of a fabric coated treated with synthetic resin of a different kind from the yarn, it is passed through possible gaps between the weft mutually form The algae-proof cover according to claim 1. 撚り糸がポリエチレン樹脂繊維でなり、織物がポリ塩化ビニル樹脂でコート処理されている請求項2に記載の防藻用カバー。The algae-proof cover according to claim 2, wherein the twisted yarn is made of a polyethylene resin fiber, and the woven fabric is coated with a polyvinyl chloride resin. 遮光率が70〜90%である請求項1、請求項2、請求項3のいずれかに記載の防藻用カバー。The cover for algae according to any one of claims 1, 2, and 3, wherein the light shielding rate is 70 to 90%. 長手方向の一端部に引紐が連結されている請求項1、請求項2、請求項3、請求項4のいずれかに記載の防藻用カバー。The cover for algae according to any one of claims 1, 2, 3, and 4, wherein a drawstring is connected to one end in the longitudinal direction. 請求項4に記載の防藻用カバーを巻取り繰出し可能な巻取り機構と、水処理槽の開口を横断して配備された上下のローラの相互間に上記防藻用カバーが挿通される複数のガイド部材と、を備えることを特徴とする防藻用カバーの展張装置。A plurality of the algae-proof covers inserted between a winding mechanism capable of winding and feeding out the algae-proof cover according to claim 4 and upper and lower rollers disposed across the opening of the water treatment tank. And an algae-proof cover extending device.
JP27643095A 1995-09-30 1995-09-30 Algae-proof cover and its extension device Expired - Fee Related JP3723918B2 (en)

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Application Number Priority Date Filing Date Title
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JP27643095A JP3723918B2 (en) 1995-09-30 1995-09-30 Algae-proof cover and its extension device

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JP3723918B2 true JP3723918B2 (en) 2005-12-07

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Publication number Priority date Publication date Assignee Title
JP3327830B2 (en) * 1997-09-01 2002-09-24 株式会社ベリタス Water quality improvement method for lakes and marshes and water quality improvement light-shielding member using the same
JP2001161209A (en) * 1999-12-13 2001-06-19 Nakatani Zosen Kk Cultured oyster raft and method for using the same
JP4831861B2 (en) * 2000-11-14 2011-12-07 タキロン株式会社 Algae cover and anti-algae structure using the same
JP7086334B2 (en) * 2018-01-17 2022-06-20 日本ソリッド株式会社 Sedimentation separation device water intake method
CN108585136A (en) * 2018-07-10 2018-09-28 珠海九通水务股份有限公司 Except the anti-algae device of algae and water treatment system

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JPS59171793U (en) * 1983-04-26 1984-11-16 日本ポリエステル株式会社 Trough shading device
JPH0312321Y2 (en) * 1986-05-07 1991-03-25
JP2529609B2 (en) * 1990-02-23 1996-08-28 石垣機工株式会社 Algae generation control device in sedimentation basin

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