JP2004196339A - Cover structure of vertical tank opening - Google Patents

Cover structure of vertical tank opening Download PDF

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Publication number
JP2004196339A
JP2004196339A JP2002365976A JP2002365976A JP2004196339A JP 2004196339 A JP2004196339 A JP 2004196339A JP 2002365976 A JP2002365976 A JP 2002365976A JP 2002365976 A JP2002365976 A JP 2002365976A JP 2004196339 A JP2004196339 A JP 2004196339A
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JP
Japan
Prior art keywords
water tank
cover
plate
peripheral
resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
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JP2002365976A
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Japanese (ja)
Inventor
Isamu Koshiro
勇 小代
Baiho Nagata
梅邦 永田
Kenji Ono
憲司 大野
Koji Shinoda
浩二 信田
Akira Awazu
亮 粟津
Takahiro Ota
貴博 太田
Yasuhide Nomura
保秀 野村
Toshihiro Sugiyama
敏浩 杉山
Original Assignee
Tokyo Metropolis
東京都
Asahi Glass Engineering Co Ltd
旭硝子エンジニアリング株式会社
Kajima Corp
鹿島建設株式会社
Nippon Aroin Kk
日本アロイン株式会社
Ryoka E-Tec Kk
菱化イーテック株式会社
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Application filed by Tokyo Metropolis, 東京都, Asahi Glass Engineering Co Ltd, 旭硝子エンジニアリング株式会社, Kajima Corp, 鹿島建設株式会社, Nippon Aroin Kk, 日本アロイン株式会社, Ryoka E-Tec Kk, 菱化イーテック株式会社 filed Critical Tokyo Metropolis
Priority to JP2002365976A priority Critical patent/JP2004196339A/en
Publication of JP2004196339A publication Critical patent/JP2004196339A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a cover structure of opening parts of supply and sewage water tanks with a small number of parts and easy execution at low cost. <P>SOLUTION: In the cover structure of opening parts of supply and sewage water tanks, L-shaped receiving frames are disposed on opening parts in a vertical wall of the supply and sewage water tanks or a plurality of opening parts formed in a floor surface to cover an upper part of the water tank, and a thermosetting resin plate is placed on/fitted to the L-shaped receiving frames. A thermosetting resin thin plate is disposed on face and back sides of the plate, and a honeycomb-like structure or a resin foam block is integrally disposed between the thin plates. A peripheral end part reinforcing resin foam body is integrally disposed on a peripheral end part of the plate, a placement part is formed on an edge part reinforcing resin foam by notching a lower portion thereof, and the placement part is fitted to/placed on the L-shaped receiving frame. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、上下水槽開口部の覆蓋構造に関する。上水(浄水)槽、下水槽などの垂直壁面開口部、または上下水槽上部を覆う床面の開口部を覆蓋(おおいぶた)で覆う覆蓋構造に関する。
【0002】
【従来の技術】
上水(浄水)設備は、その規模によって異なるが、沈砂槽(池)、沈殿槽(池)、混和槽(池)、濾過槽(池)、浄水槽(池)、配水槽(池)などが配置されている。これら各種の槽は、安全上、衛生上などの目的で、開口部を覆蓋によって覆われている。下水処理場やし尿処理場などは、その規模によって異なるが、沈殿槽(池)、汚水調整槽(池)、活性汚泥(曝気)槽、生物反応槽、混和槽(池)、濾過槽(池)、終末処理槽(池)などが配置されている。これら各種の槽(池)は、設備規模、設置場所などにより開放式、密閉式などがある。密閉式槽では、安全上、衛生上、環境上などの観点から、槽開口部は覆蓋によって覆われている。覆蓋は、上下水槽の垂直壁面開口部、または大型の上下水槽にあっては、水槽の上部を覆う床面に設けられた点検・観察用の目的で適所に設けられた複数個の開口部に、設備規模、設置場所、開口部の大きさなどに応じて、平坦型、アーチ型、ドーム型などの覆蓋が設置されている。
【0003】
コンクリート製の上下水槽(池)の開口部を覆蓋で覆う際には、コンクリート製槽を構築する際または構築した後、上下水槽の垂直壁面開口部、または、大型の上下水槽にあっては、水槽上部を覆う床面に設けられた点検・観察用の複数個の開口部に、長さ方向に直角に切断した断面がL字を呈するように切欠き(L字型支持台)を形成し、このL字型支持台にL字型受枠を配置し、このL字型受枠部分に覆蓋の端部を嵌合させる手法が採用されている。従来は、上下水槽の上部開口部の大きさに応じて、覆蓋の厚さを変え、覆蓋の厚さに応じてL字型受枠の高さ(H)と幅(W)、L字型受枠の高さ(H)と幅(W)を変えていた。
【0004】
例えば、図2に示した従来方式であると、大きさの異なる上下水槽の上部開口部の大きさ(面積)に応じて、例えば開口部の面積が大きくなると覆蓋の厚さが30mm、35mm、50mm、75mmと厚さの異なる覆蓋を準備し、覆蓋の厚さにあった大きさのL字型受枠を準備する必要があった。このため、これら多種類の覆蓋と多種類のL字型受枠との製作、保管、輸送、施工などの管理が繁雑であるばかりでなく、コスト高になるという欠点があり、改良が希求されていた。
【0005】
【発明が解決しようとする課題】
本発明は、上記諸欠点を解消した締結具を提供すべく、鋭意検討の結果完成するに至ったものである。すなわち、本発明の目的は次のとおりである。
(1)部品数を少なくできる覆蓋構造を提供すること。
(2)施工が簡単な上下水槽の垂直壁面開口部、または上下水槽の上部床面に設けられた開口部の覆蓋構造を提供すること。
(3)コスト高にならない覆蓋構造を提供すること。
【0006】
【課題を解決するための手段】
上記の問題を解決するため、本発明では、上下水槽の垂直壁面開口部、または、上下水槽上部を覆う床面に設けられた複数個の開口部に、開口部が延在する方向に対し直角に切断した断面がL字を呈するL字型受枠を配置し、このL字型受枠に熱硬化性樹脂製板状体を載置・嵌合させて上下水槽開口部を覆う覆蓋構造において、熱硬化性樹脂製板状体が、表裏面が熱硬化性樹脂製薄板によって構成され、これら二枚の薄板の間にハニカム類似構造物または発泡樹脂ブロックが配置一体化され、かつ、熱硬化性樹脂製板状体の周辺端部には周辺端部補強発泡樹脂体が配置一体化されてなり、この周辺端部補強発泡樹脂体の部分に、上記L字型受枠の高さと深さに対応させて切欠かれた載置部が設けられてなり、上記L字型受枠に周辺端部補強発泡樹脂体の載置部が載置・嵌合可能にされてなることを特徴とする、上下水槽開口部の覆蓋構造を提供する。
【0007】
【発明の実施の態様】
以下、本発明を詳細に説明する。
本発明において上水(浄水)槽(池)とは、地上に配置された上水(浄水)設備における沈砂槽、沈殿槽、混和槽、濾過槽、浄水槽、配水槽などをいい、下水槽(池)とは、下水処理場やし尿処理場などにおける沈殿槽、汚水調整槽、活性汚泥(曝気)槽、生物反応槽、混和槽、濾過槽、終末処理槽などをいう。本発明において開口部とは、これら上下水槽が小型ないし中型の場合は、上下水槽の垂直壁面開口部、および、上下水槽が大型の場合は上部を覆う床面の適所に設けられた開口部を意味する。
【0008】
上記上下水槽は、コンクリートによって構築される。上下水槽の平面形状は、水槽の種類により異なり、一辺が0.3m〜6m、他辺が1m×100mの範囲の長方形であって、深さ1m〜10m、水槽壁面の厚さ5cm〜50cmの範囲で選ばれる。コンクリート製上下水槽の平面形状が小型ないし中型の場合は、上下水槽の垂直壁面開口部に、開口部が延在する方向に対して直角に切断した断面がL字を呈するようにしたL字型切欠き(L字型支持台)を設ける。上下水槽の平面形状が大型の場合は、水槽上部を覆う床面の適所に設けた開口部に、上と同様の構造を有するL字型支持台を設ける。
【0009】
L字型支持台は、後記する金属製のL字を呈するL字型受枠を支持し、固定する機能を果たす。L字型支持台は、木枠内にコンクリートを注入して水槽を構築する際に、L字型支持台を形成する部分を有する枠を使用して設けるか、または壁面をコンクリートによって構築したあと、はつりによって設けることもできる。L字型支持台の大きさ(寸法)は、水槽の大きさ(容量)、水槽垂直壁面、水槽上部床面の厚さに応じて、高さ(後記する図1のH)を30〜100mm、幅(後記する図1のW)を、30〜100mmの範囲で選ぶのが好ましい。幅(W)は、水槽垂直壁面、水槽上部床面の厚さの1/2以下とするのが好ましい。
【0010】
L字型受枠は、このL字型受枠に嵌合した水槽開口部を覆う覆蓋を開閉する際に、水槽開口部壁面が破損しないように保護する機能を果たす。金属材料や樹脂材料から調製するのが好ましい。金属としては、鉄、ステンレススティール、アルミニウム合金などが挙げられ、樹脂材料としては、不飽和ポリエステル、メラミン樹脂、フェノール樹脂、尿素樹脂などの熱硬化性樹脂が挙げられる。L字型受枠の寸法は、水槽開口部に設けたL字型支持台の高さ(H)と幅(W)(後記、図1参照)と同一とするのが好ましい。L字型受枠を構成する金属の厚さは、薄すぎると輸送、保管、施工などの過程で変形する恐れがあり、厚すぎると重くなりコスト高になり、いずれも好ましくない。L字型受枠を構成する金属の厚さは、3〜10mmの範囲で選ぶのが好ましく、中でも3〜7mmの範囲が好適である。
【0011】
水槽開口部の上記L字型受枠に載置・嵌合する覆蓋は、熱硬化性樹脂製板状体(以下、単に「板状体」と記載することがある)によって調製する。板状体は、表裏が熱硬化性樹脂製薄板によって構成され、これら二枚の薄板の間にハニカム類似構造物、または発泡樹脂ブロックが一体に配置されたものとする。
【0012】
本発明においてハニカム類似構造物とは、表裏二枚の熱硬化性樹脂製薄板の間に、ハニカム類似構造物が延在する方向に対して直角に切断した短い構造体を配置したものをいう。ハニカム類似構造物は、延在する方向に短く切断した際の断面が、波型状、六角柱状、四角柱状、円柱状を呈するもの、またはこれらを組合せた構造より選ばれたものが挙げられる。波型状のものは、波型の山同士を接触一体化したものが代表的であり、六角柱状のものは六角柱を最密充填状に並べて一体化したものが代表的であり、四角柱状のものは断面の平面形状が格子を形成するものが代表的であり、円柱状のものは円柱、を最密充填状に並べて接触部分を一体化したものが代表的である。これらを組合せたものは六角柱、四角柱、円柱などを任意に組合せて選ぶ、最密充填状に並べて接触部分を一体化したものが挙げられる。なお、柱状体の両端部は閉鎖されているものが好ましい。柱状体の壁面および壁面の接触部分が表裏二枚の薄板をつないで、板状体の強度を向上させ、壁面に囲まれた部分は独立した空隙を形成して断熱性を発揮し、板状体の重量を軽量化する。
【0013】
表裏二枚の薄板およびこれら薄板の間に配置されるハニカム類似構造物は、いずれも熱硬化性樹脂より調製する。熱硬化性樹脂としては、不飽和ポリエステル樹脂、メラミン樹脂、フェノール樹脂、尿素樹脂などが挙げられる。板状体を製造する際の成形性、板状体の強度などの観点から、不飽和ポリエステル樹脂が好適である。熱硬化性樹脂にガラス繊維を配合すると、板状体の強度を大幅に向上させることができるので、好ましい。ガラス繊維のガラスの種類は制限されず、繊維の形態も単繊維、長尺の単繊維を数十本収束して1〜10mmの長さに切断されたチョップドストランドなど、いずれでもよい。ガラス繊維の配合量は、20〜45重量%の範囲で選ぶことができる。ガラス繊維は、熱硬化性樹脂との親和性を向上させる目的で、表面処理されたものが好ましい。
【0014】
熱硬化性樹脂製板状体を構成する表裏二枚の薄板の厚さ(t1)、ハニカム類似構造物の延在する方向に短く切断されたような構造で、柱状体の両端部は同じ材料で閉鎖され、長さ(高さ)は、20mm〜10cmの範囲で選ぶことができる。柱状体の壁面の厚さ(t2)は、いずれも薄すぎると強度が十分ではなく、厚すぎると重くなりコスト高になり、いずれも好ましくない。表裏二枚の薄板の厚さ(t1)は、2mm〜5mmの範囲、柱状体の壁面の厚さ(t2)は0.2mm〜1mmの範囲で選ぶのが好ましい。表裏の薄板を形成する熱硬化性樹脂には、着色剤、光安定剤、紫外線吸収剤などを配合することができる。表裏二枚の薄板のうち、表面側に配置される薄板表面に凹凸模様を呈する滑り止めを形成するのが好ましい。板状体の面積が大きいときは、ハニカム類似構造物の中に、表裏二枚の薄板を一体に接合しする梁を配置するのが好ましい。梁は、薄板状、角柱状のもの一本でも複数本であってもよく、これらを格子状に組合せたものであってもよい。
【0015】
本発明において発泡樹脂ブロックとは、表裏二枚の熱硬化性樹脂製薄板の間に配置され、板状体を補強し断熱性を付与するように機能する。発泡樹脂ブロックを構成する樹脂は、熱可塑性樹脂、熱硬化性樹脂のいずれであってもよい。熱可塑性樹脂としては、ポリスチレン、ABS樹脂などのスチレン系樹脂、ポリエチレン、ポリプロピレンなどのオレフィン系樹脂、塩化ビニル系樹脂、アクリル系樹脂などが挙げられ、熱硬化性樹脂としては不飽和ポリエステル樹脂、メラミン樹脂、フェノール樹脂、尿素樹脂などが挙げられる。発泡樹脂ブロックは、発泡倍率が2〜50倍、厚さが20mm〜10cmの範囲で外観が板状を呈するものが好適である。板状体の面積が大きいときも、発泡樹脂ブロックの中に、表裏二枚の薄板を一体に接合する梁を配置するのが好ましい。梁は、薄板状、角柱状のもの一本でも複数本であってもよく、これらを格子状に組合せたものであってもよい。
【0016】
上記熱硬化性樹脂製板状体の周辺端部には、周辺端部補強発泡樹脂体を配置し、表裏二枚の薄板、およびハニカム類似構造物または発泡樹脂ブロックと一体化させる。この周辺端部補強発泡樹脂体は、板状体の周辺端部を補強するように機能する。周辺端部補強発泡樹脂体の幅(最端部から板状体の中央部分に延びる幅)は、小さすぎると周辺端部補強発泡樹脂体による板状体周辺端部の補強機能が十分に発揮されず、大きすぎると板状体が重くなるほか、コスト高になり、いずれも好ましくない。
【0017】
上記構造の熱硬化性樹脂製板状体を製造するには、表裏二枚の薄板、ハニカム類似構造物または発泡樹脂ブロック、周辺端部補強発泡樹脂体などの一部をあらかじめ別工程で調製し、これらを組合せて熱圧着することによって一体化し板状体とすることができる。
【0018】
周辺端部補強発泡樹脂体には、上記L字型受枠の高さと深さに対応させて載置部が設けられてなる。載置部は、L字型受枠の高さ(H)より厚い寸法の板状体を切欠いて、L字型受枠の高さ(H)と同一ないし若干小さくする。若干小さくする際の寸法は、L字型受枠に載置部を載置・嵌合させる際に介在させるパッキングの厚さ(2mm〜10mm)とほぼ同じ寸法とするのが好ましい。切欠かれる幅は、L字型受枠の幅(W)と同一ないし若干大きい寸法とする。
【0019】
周辺端部補強発泡樹脂体を形成する樹脂の種類は、表裏二枚の薄板およびハニカム類似構造物を構成するものとして挙げた同種の樹脂のほか、ポリウレタン樹脂、熱可塑性樹脂、熱硬化性樹脂と熱可塑性樹脂の混合物であってもよい。この周辺端部補強発泡樹脂体を構成する樹脂にも、ガラス繊維を配合すると強度が向上し、載置部の厚さが板状体の元の厚さより小さくなっても、載置部が破損し難くなり、好ましい。ガラス繊維の種類、形態、配合量なども、表裏二枚の薄板およびハニカム類似構造におけると同様とすることができる。
【0020】
熱硬化性樹脂製板状体製の覆蓋には、水槽内の状況を観察したり、薬剤を添加するために覆蓋を開けることがあるが、この目的のために板状体の適所に取っ手や覗き窓を設けることもできる。L字型受枠に熱硬化性樹脂製板状体製の覆蓋を載置し、嵌合する際に、L字型受枠の幅部分にクロロプレンゴムなどのゴム製パッキンを介在させるのが好ましい。
【0021】
【実施例】
以下、本発明を図面に基づいて更に詳細に説明するが、本発明はこれら例示したものに限定されるものではない。
【0022】
図1は、本発明に係る覆蓋構造の一例を示す縦断側面図であり、図2は従来の覆蓋構造の一例を示す縦断側面図である。図1および図2とも、垂直壁面の開口部の覆蓋構造の例を示したが、この構造は上下水槽上部を覆う床面開口部の覆蓋に適用できるのはもちろんである。図において、1は水槽壁面、2はL字型支持台、3はL字型受枠、4は板状体、5は表面側薄板、6は裏面側薄板、8はハニカム類似構造物7の壁面、9は空隙部、10は周辺端部補強発泡樹脂体、11は載置部、12パッキングである。
【0023】
図1に示した本発明に係る覆蓋構造では、上下水槽の開口部に、長さ方向に直角に切断した断面がL字を呈し、高さ(H)35mm、幅(W)35mmのL字型支持台2を設け、このL字型支持台2に厚さ4mm、高さ(H)50mm、幅(W)50mmのL字型受枠3が配置されている。一方、熱硬化性樹脂よりなる厚さが50mmの板状体4は、ハニカム類似構造物7の両面に厚さが5mmの薄板5、6が一体に設けられている。板状体4の周辺端部には、ポリウレタン樹脂にガラス繊維チョップドストランドを25重量%配合し、3倍発泡させた樹脂を充填させた周辺端部補強発泡樹脂体10を一体に形成した。周辺端部補強発泡樹脂体10は、上記L字型受枠3の高さと深さに対応させて切欠かれた載置部11(厚さ43mm、深さ幅41mm)が設けられてなり、この載置部11がL字型受枠3にポリクロロプレンゴム製パッキング12(厚さ3mm)を介して載置嵌合されている。
【0024】
図2に示した従来の覆蓋構造は、L字型支持台2は高さ(H)50mm、幅(W)50mmであり、このL字型支持台2に厚さ5mm、高さ(H)50mm、幅(W)50mmのL字型受枠3が配置され、このL字型受枠3に、熱硬化性樹脂製で厚さが50mmの板状体4がポリクロロプレンゴム製パッキング12(厚さ2mm)を介して載置嵌合されている。
【0025】
図1に示した例では、板状体4の周縁端部に補強発泡樹脂体が配置一体化されているので、この部分が補強され、覆蓋を多数回開閉しても破損し難い。また、板状体4の厚さが50mmであるが、この載置部11が厚さ33mmにされているので、厚さが35mmの板状体用のL字型受枠を使用することがでる。これによって、厚さが50mm用のL字型受枠を製造する必要がなく、L字型受枠の重量が軽いのでコストが安く、部品の数を少なくすることと相俟って、製品の管理、施工作業などが容易となる。これに対して、従来の覆蓋構造においては、板状体の厚さに対応した数のL字型受枠を準備する必要があり、部品の数が多くなり、製品の管理、施工作業などが繁雑であった。
【0026】
【発明の効果】
本発明は、以上詳細に説明したとおりであり、次のような特別に有利な効果を奏し、その産業上の利用価値は極めて大である。
1.本発明に係る上下水槽開口部の覆蓋構造における覆蓋は、表裏二枚の薄板の間にハニカム類似構造物が配置されたものであるときは、ハニカム類似構造物が延在する方向に短く切断した構造体の両端に、熱硬化性樹脂製薄板が一体にされた板状体より構成されているので、軽量であるにも拘らず強度に優れている。
2.本発明に係る上下水槽開口部の覆蓋構造における覆蓋は、表裏二枚の薄板の間に発泡樹脂ブロックが一体に配置されたものであるときは、軽量であるにも拘らず強度に優れている。
3.本発明に係る上下水槽開口部の覆蓋構造における覆蓋は、熱硬化性樹脂製板状体の周辺端部に、周辺端部補強発泡樹脂体が形成されているので、板状体の周辺端部がこれによって補強され周辺端部が破損し難い。
【0027】
4.従来は水槽開口部の大きさ(面積)に応じて、L字型支持台の大きさ(高さと幅)を変えていたので、多数のL字型受枠が必要であったが、本発明に係る上下水槽開口部の覆蓋構造は、水槽開口部の大きさ、熱硬化性樹脂製板状体の厚さが変っても、周辺端部補強発泡樹脂体の切欠き大きさ従来のものよりも小さくでき、しかも載置部の厚さを変えて対応できるので、L字型受枠の種類を大幅に少なくし、重量も軽いものにすることができる。
5.本発明に係る上下水槽開口部の覆蓋構造は、部品数を少なくでき、製作、保管、輸送、施工などの管理が簡単である。
6.本発明に係る上下水槽開口部の覆蓋構造は、部品数を少なくできるので、製作、保管、輸送、施工などに要するコストを大幅に削減できる。
【図面の簡単な説明】
【図1】本発明に係る覆蓋構造の一例を示す縦断側面図である。
【図2】従来の覆蓋構造の一例を示す縦断側面図である。
【符号の説明】
1:水槽壁面
2:L字型支持台
3:L字型受枠
4:板状体
5:表面側薄板
6:裏面側薄板
7:ハニカム類似構造物
8:壁面
9:空隙部
10:周辺端部補強発泡樹脂体
11:載置部
12:パッキング
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cover structure for an opening of a water tank. The present invention relates to a cover structure in which a vertical wall opening of a clean water (purifying) tank, a sewer tank, or the like, or an opening of a floor covering the upper and lower water tanks is covered with a cover (cover).
[0002]
[Prior art]
Water supply (purification) facilities vary depending on the scale, but sand settling tanks (ponds), sedimentation tanks (ponds), mixing tanks (ponds), filtration tanks (ponds), water purification tanks (ponds), distribution tanks (ponds), etc. Is arranged. The openings of these various tanks are covered with lids for safety and hygiene purposes. Sewage treatment plants and human waste treatment plants vary depending on the scale, but sedimentation tanks (ponds), sewage adjustment tanks (ponds), activated sludge (aeration) tanks, biological reaction tanks, mixing tanks (ponds), filtration tanks (ponds) ), Terminal treatment tanks (ponds) and the like. These various tanks (ponds) may be of an open type or a closed type depending on the equipment scale, installation location, and the like. In the closed tank, the tank opening is covered with a cover from the viewpoints of safety, hygiene, environment and the like. Covers are installed on the vertical wall openings of the upper and lower water tanks, or, in the case of large water tanks, on the floor covering the upper part of the water tank, a plurality of openings provided at appropriate places for inspection and observation purposes. Depending on the size of the equipment, the installation location, the size of the opening, etc., a cover such as a flat type, an arch type, or a dome type is installed.
[0003]
When covering the opening of a concrete water tank (pond) with a cover, when constructing or after building a concrete tank, in the vertical wall opening of the water tank or large water tank, Notches (L-shaped support bases) are formed in a plurality of openings for inspection and observation provided on the floor covering the upper part of the aquarium so that the cross section cut at right angles to the longitudinal direction has an L-shape. A method is adopted in which an L-shaped receiving frame is arranged on the L-shaped support base, and an end of the cover is fitted to the L-shaped receiving frame portion. Conventionally, the thickness of the lid is changed according to the size of the upper opening of the water tank, and the height (H) and width (W) of the L-shaped receiving frame and the L-shaped receiving frame are changed according to the thickness of the lid. Was changing the height (H) and width (W).
[0004]
For example, according to the conventional method shown in FIG. 2, according to the size (area) of the upper opening of the upper and lower water tanks having different sizes, for example, when the area of the opening is larger, the thickness of the cover is 30 mm, 35 mm, It was necessary to prepare cover lids having different thicknesses of 50 mm and 75 mm, and prepare an L-shaped receiving frame having a size corresponding to the thickness of the cover lid. For this reason, the management of production, storage, transportation, construction, etc. of these various types of covers and various types of L-shaped receiving frames is not only complicated, but also has the disadvantage that the cost is high, and improvements are sought. Was.
[0005]
[Problems to be solved by the invention]
The present invention has been completed as a result of intensive studies in order to provide a fastener that has solved the above-mentioned drawbacks. That is, the objects of the present invention are as follows.
(1) To provide a cover structure that can reduce the number of parts.
(2) To provide a cover structure for the vertical wall opening of the upper and lower water tank or the opening provided on the upper floor of the upper and lower water tank, which is easy to construct.
(3) To provide a cover structure that does not increase the cost.
[0006]
[Means for Solving the Problems]
In order to solve the above problem, in the present invention, the vertical wall openings of the upper and lower water tanks, or a plurality of openings provided on the floor surface covering the upper and lower water tanks, perpendicular to the direction in which the openings extend An L-shaped receiving frame having an L-shaped cross section is arranged, and a thermosetting resin plate is placed and fitted on the L-shaped receiving frame to cover the upper and lower water tank openings. Curable resin plate-like body, the front and back surfaces are composed of thermosetting resin thin plates, a honeycomb-like structure or a foamed resin block is arranged and integrated between these two thin plates, and the thermosetting resin A peripheral end reinforcing foamed resin body is arranged and integrated at a peripheral end of the plate-shaped body. The peripheral end reinforcing foamed resin body is made to correspond to the height and depth of the L-shaped receiving frame. A notched mounting portion is provided, and the peripheral end reinforcement Wherein the mounting portion of the resin body is formed by allowing mounting-fitting, provides covering structure of the upper and lower water tank opening.
[0007]
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Hereinafter, the present invention will be described in detail.
In the present invention, the water supply (purification) tank (pond) refers to a sedimentation tank, a sedimentation tank, a mixing tank, a filtration tank, a water purification tank, a water distribution tank, and the like in a water supply (purification) facility disposed on the ground. (Pond) refers to sedimentation tanks, sewage adjustment tanks, activated sludge (aeration) tanks, biological reaction tanks, mixing tanks, filtration tanks, terminal treatment tanks and the like in sewage treatment plants and human waste treatment plants. In the present invention, the opening means the vertical wall openings of the upper and lower water tanks when the upper and lower water tanks are small to medium-sized, and the opening provided at an appropriate position on the floor covering the upper part when the upper and lower water tanks are large. means.
[0008]
The water tank is constructed of concrete. The plane shape of the upper and lower water tanks varies depending on the type of the water tank, and is a rectangle of 0.3 m to 6 m on one side and 1 m × 100 m on the other side, having a depth of 1 m to 10 m and a wall thickness of the water tank of 5 cm to 50 cm. Selected by range. When the plan shape of the concrete water basin is small or medium, an L-shaped cross section cut at right angles to the direction in which the opening extends is formed in the vertical wall opening of the water basin. A notch (L-shaped support) is provided. When the upper and lower water tanks have a large planar shape, an L-shaped support having the same structure as above is provided in an opening provided at an appropriate position on the floor covering the upper part of the water tank.
[0009]
The L-shaped support base has a function of supporting and fixing an L-shaped receiving frame having a metal L-shape, which will be described later. When constructing an aquarium by injecting concrete into a wooden frame, an L-shaped support is provided using a frame having a portion forming an L-shaped support, or after a wall is constructed of concrete. , Can also be provided by a drop. The size (dimensions) of the L-shaped support is 30 to 100 mm in height (H in FIG. 1 described later) according to the size (capacity) of the water tank, the thickness of the vertical wall surface of the water tank, and the thickness of the upper floor surface of the water tank. And the width (W in FIG. 1 described later) are preferably selected in the range of 30 to 100 mm. The width (W) is preferably not more than の of the thickness of the vertical wall surface of the water tank and the upper floor surface of the water tank.
[0010]
The L-shaped receiving frame has a function of protecting the wall surface of the water tank opening from being damaged when opening and closing a cover for covering the water tank opening fitted to the L-shaped receiving frame. It is preferably prepared from a metal material or a resin material. Examples of the metal include iron, stainless steel, and aluminum alloy, and examples of the resin material include a thermosetting resin such as an unsaturated polyester, a melamine resin, a phenol resin, and a urea resin. The dimensions of the L-shaped receiving frame are preferably the same as the height (H) and the width (W) of the L-shaped support provided at the opening of the water tank (see FIG. 1 described later). If the thickness of the metal forming the L-shaped receiving frame is too small, there is a possibility that the metal will be deformed in the course of transportation, storage, construction and the like, and if it is too thick, the weight will increase and the cost will increase. The thickness of the metal constituting the L-shaped receiving frame is preferably selected in the range of 3 to 10 mm, and particularly preferably in the range of 3 to 7 mm.
[0011]
The cover to be placed and fitted on the L-shaped receiving frame at the opening of the water tank is prepared by a thermosetting resin plate (hereinafter, may be simply referred to as “plate”). The plate-like body is made of a thermosetting resin thin plate on the front and back, and a honeycomb-like structure or a foamed resin block is integrally arranged between these two thin plates.
[0012]
In the present invention, the term "honeycomb-like structure" refers to a structure in which a short structure cut at a right angle to a direction in which the honeycomb-like structure extends extends between two front and back thermosetting resin thin plates. The honeycomb-like structure has a cross section cut into a short shape in the direction in which it extends, and has a corrugated shape, a hexagonal column shape, a square column shape, a columnar shape, or a structure selected from a combination thereof. The corrugated one is typically formed by contacting and integrating corrugated peaks, and the hexagonal column is typically formed by integrating hexagonal columns in close-packed form, Is typically a lattice having a planar cross-sectional shape forming a lattice, and a columnar shape is typically a column in which the contact portions are integrated in a close-packed manner. As a combination of these, a hexagonal column, a quadrangular column, a cylindrical column, or the like may be arbitrarily combined and selected. Preferably, both ends of the columnar body are closed. The wall surface of the columnar body and the contact part of the wall surface connect the two thin plates on the front and back to improve the strength of the plate-like body, and the part surrounded by the wall forms an independent void to exhibit heat insulation, Reduce body weight.
[0013]
Both the front and back thin sheets and the honeycomb-like structure disposed between the thin sheets are prepared from a thermosetting resin. Examples of the thermosetting resin include an unsaturated polyester resin, a melamine resin, a phenol resin, and a urea resin. Unsaturated polyester resins are preferred from the viewpoints of moldability and the strength of the plate when manufacturing the plate. It is preferable to mix glass fibers with the thermosetting resin because the strength of the plate-like body can be greatly improved. The glass type of the glass fiber is not limited, and the fiber may be in any form such as a single fiber or a chopped strand obtained by converging several tens of long single fibers into a length of 1 to 10 mm. The blending amount of the glass fiber can be selected in the range of 20 to 45% by weight. The glass fiber is preferably surface-treated for the purpose of improving the affinity with the thermosetting resin.
[0014]
The thickness (t1) of the two front and back thin plates constituting the thermosetting resin plate-like body, a structure that is cut short in the direction in which the honeycomb-like structure extends, and both ends of the columnar body are made of the same material The length (height) can be selected from a range of 20 mm to 10 cm. Regarding the thickness (t2) of the wall surface of the columnar body, if both are too thin, the strength is not sufficient, and if too thick, the weight increases and the cost increases, and both are not preferable. It is preferable that the thickness (t1) of the two front and back thin plates be selected in the range of 2 mm to 5 mm, and the thickness (t2) of the wall surface of the columnar body be selected in the range of 0.2 mm to 1 mm. A coloring agent, a light stabilizer, an ultraviolet absorber and the like can be blended with the thermosetting resin forming the front and back thin plates. It is preferable to form a non-slip exhibiting a concavo-convex pattern on the surface of the thin plate disposed on the front side of the two thin plates on the front and back sides. When the area of the plate-like body is large, it is preferable to dispose a beam that integrally joins the two thin plates on the front and back in the honeycomb-like structure. The beam may be one or more in the shape of a thin plate or a prism, or may be a combination of these in a lattice shape.
[0015]
In the present invention, the foamed resin block is disposed between the front and back two thermosetting resin thin plates, and functions to reinforce the plate-like body and to provide heat insulation. The resin constituting the foamed resin block may be either a thermoplastic resin or a thermosetting resin. Examples of the thermoplastic resin include styrene resins such as polystyrene and ABS resin, olefin resins such as polyethylene and polypropylene, vinyl chloride resins, and acrylic resins. Examples of the thermosetting resins include unsaturated polyester resins and melamine. Resins, phenol resins, urea resins, and the like. The foamed resin block preferably has a foaming ratio of 2 to 50 times and a thickness of 20 mm to 10 cm and has a plate-like appearance. Even when the area of the plate-shaped body is large, it is preferable to dispose a beam for integrally joining the front and back thin plates in the foamed resin block. The beam may be one or more in the shape of a thin plate or a prism, or may be a combination of these in a lattice shape.
[0016]
A peripheral end reinforcing foamed resin body is arranged at the peripheral end of the thermosetting resin plate-shaped body, and is integrated with the two thin plates on the front and back and a honeycomb-like structure or a foamed resin block. The peripheral end reinforcing foamed resin body functions to reinforce the peripheral end of the plate-like body. If the width of the peripheral end reinforcing foamed resin body (the width extending from the outermost end to the central portion of the plate-shaped body) is too small, the peripheral end reinforcing foamed resin body sufficiently exerts the reinforcing function of the peripheral end of the plate-shaped body. On the other hand, if the size is too large, the plate-shaped body becomes heavy and the cost increases, which is not preferable.
[0017]
In order to manufacture a thermosetting resin plate having the above structure, two front and back thin plates, a honeycomb-like structure or a foamed resin block, and a portion of a peripheral end portion reinforced foamed resin body are prepared in a separate process in advance. These can be combined into a plate by thermocompression bonding.
[0018]
The peripheral end reinforcing foamed resin body is provided with a mounting portion corresponding to the height and depth of the L-shaped receiving frame. The mounting portion is formed by cutting out a plate-like body having a size larger than the height (H) of the L-shaped receiving frame, and is set to be equal to or slightly smaller than the height (H) of the L-shaped receiving frame. It is preferable that the dimension when the size is slightly reduced is substantially the same as the thickness (2 mm to 10 mm) of the packing interposed when the placing portion is placed and fitted on the L-shaped receiving frame. The width of the cutout is the same as or slightly larger than the width (W) of the L-shaped receiving frame.
[0019]
The type of resin that forms the peripheral edge reinforcing foamed resin body is the same type of resin that is listed as constituting the front and back two thin plates and the honeycomb-like structure, polyurethane resin, thermoplastic resin, and thermosetting resin. It may be a mixture of thermoplastic resins. When glass fiber is also added to the resin constituting the peripheral end reinforcing foamed resin body, the strength is improved, and even if the thickness of the mounting portion is smaller than the original thickness of the plate-shaped body, the mounting portion is damaged. It is difficult to perform, which is preferable. The type, form, and blending amount of glass fibers can be the same as those in the front and back two thin plates and the honeycomb-like structure.
[0020]
The cover made of a thermosetting resin plate may be used to observe the condition in the water tank or open the cover to add a drug. A viewing window can also be provided. When a cover made of a thermosetting resin plate is placed on the L-shaped receiving frame and fitted, a rubber packing such as chloroprene rubber is preferably interposed in the width of the L-shaped receiving frame.
[0021]
【Example】
Hereinafter, the present invention will be described in more detail with reference to the drawings, but the present invention is not limited to these examples.
[0022]
FIG. 1 is a vertical sectional side view showing an example of a cover structure according to the present invention, and FIG. 2 is a vertical sectional side view showing an example of a conventional cover structure. Although FIGS. 1 and 2 show examples of the cover structure of the opening of the vertical wall surface, this structure can be applied to the cover of the floor opening covering the upper and lower water tanks. In the figure, 1 is a water tank wall, 2 is an L-shaped support, 3 is an L-shaped receiving frame, 4 is a plate-like body, 5 is a front side thin plate, 6 is a back side thin plate, and 8 is a wall surface of a honeycomb-like structure 7. Numeral 9 denotes a void portion, 10 denotes a peripheral end reinforcing foamed resin body, 11 denotes a mounting portion, and 12 packings.
[0023]
In the cover structure according to the present invention shown in FIG. 1, an L-shaped cross section cut at a right angle to the length direction at the opening of the upper and lower water tank has an L-shape having a height (H) of 35 mm and a width (W) of 35 mm. A mold support 2 is provided, and an L-shaped receiving frame 3 having a thickness of 4 mm, a height (H) of 50 mm, and a width (W) of 50 mm is arranged on the L-shaped support 2. On the other hand, the plate-like body 4 made of a thermosetting resin and having a thickness of 50 mm has thin plates 5 and 6 having a thickness of 5 mm integrally provided on both surfaces of a honeycomb-like structure 7. At the peripheral end of the plate-like body 4, a peripheral-end reinforcing foamed resin body 10 in which 25% by weight of a glass fiber chopped strand was mixed with a polyurethane resin and filled with a three-fold foamed resin was integrally formed. The peripheral end reinforcing foamed resin body 10 is provided with a mounting portion 11 (thickness 43 mm, depth width 41 mm) cut out corresponding to the height and depth of the L-shaped receiving frame 3. The placing portion 11 is placed and fitted to the L-shaped receiving frame 3 via a packing 12 (thickness: 3 mm) made of polychloroprene rubber.
[0024]
In the conventional cover structure shown in FIG. 2, the L-shaped support 2 has a height (H) of 50 mm and a width (W) of 50 mm, and the L-shaped support 2 has a thickness of 5 mm and a height (H). An L-shaped receiving frame 3 having a size of 50 mm and a width (W) of 50 mm is arranged, and a plate-like body 4 made of a thermosetting resin and having a thickness of 50 mm is provided with a polychloroprene rubber packing 12 (thickness). 2 mm).
[0025]
In the example shown in FIG. 1, since the reinforcing foamed resin body is arranged and integrated at the peripheral edge of the plate-shaped body 4, this portion is reinforced and hardly damaged even if the cover is opened and closed many times. Although the thickness of the plate-like body 4 is 50 mm, since the mounting portion 11 is 33 mm thick, an L-shaped receiving frame for a plate-like body having a thickness of 35 mm can be used. . As a result, there is no need to manufacture an L-shaped receiving frame for a thickness of 50 mm, and since the weight of the L-shaped receiving frame is light, the cost is low, and the number of parts is reduced. Construction work becomes easier. On the other hand, in the case of the conventional cover structure, it is necessary to prepare L-shaped receiving frames of a number corresponding to the thickness of the plate-like body, which increases the number of parts, and complicates product management and construction work. Met.
[0026]
【The invention's effect】
As described in detail above, the present invention has the following special advantageous effects, and its industrial utility value is extremely large.
1. The cover in the cover structure of the upper and lower water tank opening according to the present invention, when the honeycomb-like structure is disposed between the two thin plates on the front and back, was cut short in the direction in which the honeycomb-like structure extends. Since the thin plate made of thermosetting resin is integrated at both ends of the structure, it is excellent in strength despite its light weight.
2. The cover in the cover structure of the upper and lower water tank opening according to the present invention has excellent strength despite its light weight when the foamed resin block is integrally disposed between the two thin plates on the front and back. .
3. The cover in the cover structure of the upper and lower water tank openings according to the present invention has a peripheral end reinforced foamed resin body formed at the peripheral end of the thermosetting resin plate, so that the peripheral end of the plate is formed. However, it is reinforced by this, and the peripheral end is hardly damaged.
[0027]
4. Conventionally, the size (height and width) of the L-shaped support is changed according to the size (area) of the aquarium opening, so that a large number of L-shaped receiving frames are required. Such a cover structure of the upper and lower water tank opening, the size of the water tank opening, even if the thickness of the thermosetting resin plate-like body changes, the notch size of the peripheral end reinforcing foamed resin body than the conventional one. Since the size can be reduced and the thickness of the mounting portion can be changed, the type of the L-shaped receiving frame can be significantly reduced and the weight can be reduced.
5. The lid structure of the opening and closing of the water tank according to the present invention can reduce the number of parts and can easily manage production, storage, transportation, construction, and the like.
6. Since the cover structure of the opening and closing of the water tank according to the present invention can reduce the number of parts, the costs required for production, storage, transportation, construction, and the like can be significantly reduced.
[Brief description of the drawings]
FIG. 1 is a vertical sectional side view showing an example of a cover structure according to the present invention.
FIG. 2 is a vertical sectional side view showing an example of a conventional cover structure.
[Explanation of symbols]
1: water tank wall 2: L-shaped support 3: L-shaped receiving frame 4: plate 5: front thin plate 6: back thin plate 7: honeycomb-like structure 8: wall 9: void 10: peripheral edge Reinforced foamed resin body 11: mounting part 12: packing

Claims (6)

  1. 上下水槽の垂直壁面開口部、または、上下水槽上部を覆う床面に設けられた複数個の開口部に、開口部が延在する方向に対し直角に切断した断面がL字を呈するL字型受枠を配置し、このL字型受枠に熱硬化性樹脂製板状体を載置・嵌合させて上下水槽開口部を覆う覆蓋構造において、熱硬化性樹脂製板状体が、表裏面が熱硬化性樹脂製薄板によって構成され、これら二枚の薄板の間にハニカム類似構造物または発泡樹脂ブロックが配置一体化され、かつ、熱硬化性樹脂製板状体の周辺端部には周辺端部補強発泡樹脂体が配置一体化されてなり、この周辺端部補強発泡樹脂体の部分に、上記L字型受枠の高さと深さに対応させて切欠かれた載置部が設けられてなり、上記L字型受枠に周辺端部補強発泡樹脂体の載置部が載置・嵌合可能にされてなることを特徴とする、上下水槽開口部の覆蓋構造。An L-shaped cross-section cut at right angles to the direction in which the openings extend in the vertical wall openings of the upper and lower water tanks, or a plurality of openings provided on the floor covering the upper and lower water tanks A receiving frame is arranged, and a thermosetting resin plate is placed and fitted on the L-shaped receiving frame to cover the upper and lower water tank openings. A honeycomb-like structure or a foamed resin block is arranged and integrated between these two thin plates, and the peripheral end of the thermosetting resin plate-like body has a peripheral end. A part reinforced foamed resin body is arranged and integrated, and a mounting portion cut out corresponding to the height and the depth of the L-shaped receiving frame is provided in a part of the peripheral end reinforced foamed resin body. A mounting portion of the peripheral end reinforcing foamed resin body can be mounted and fitted to the L-shaped receiving frame. Characterized by comprising, covering the structure of the upper and lower water tank opening.
  2. ハニカム類似構造物は、延在する方向に対して直角に短く切断した際の断面が、波型状、六角柱状、四角柱状、円柱状を呈する構造、またはこれらを組合せた構造のものより選ばれたものである、請求項1に記載の上下水槽開口部の覆蓋構造。The honeycomb-like structure is selected from a structure in which a cross section when cut short at right angles to the extending direction has a corrugated shape, a hexagonal column shape, a square column shape, a columnar shape, or a structure combining these. The lid structure for an opening of a water tank according to claim 1, wherein the lid is formed.
  3. 発泡樹脂ブロックは、熱可塑性樹脂製および/または熱硬化性樹脂製の発泡体である、請求項1または請求項2に記載の上下水槽開口部の覆蓋構造。The lid structure for the upper and lower water tank openings according to claim 1 or 2, wherein the foamed resin block is a foam made of a thermoplastic resin and / or a thermosetting resin.
  4. 熱硬化性樹脂製板状体が平坦型で、その上側面に凹凸模様を呈する滑り止めが形成されてなる、請求項1ないし請求項3のいずれか一項に記載の上下水槽開口部の覆蓋構造。The lid for the upper and lower water tank openings according to any one of claims 1 to 3, wherein the thermosetting resin plate-like body is a flat type, and an upper surface thereof is provided with an anti-slip exhibiting a concavo-convex pattern. Construction.
  5. 熱硬化性樹脂製板状体を構成する樹脂が、不飽和ポリエステルであり、周辺端部補強発泡樹脂体が、ガラス繊維で補強された熱可塑性樹脂製発泡体および/または熱硬化性樹脂製発泡体である、請求項1ないし請求項4のいずれか一項に記載の上下水槽開口部の覆蓋構造。The resin constituting the thermosetting resin plate is unsaturated polyester, and the peripheral end reinforcing foamed resin is a thermoplastic resin foam and / or thermosetting resin foam reinforced with glass fiber. The cover structure for the upper and lower water tank openings according to any one of claims 1 to 4, which is a body.
  6. 二枚の薄板の間に配置されハニカム類似構造物または発泡樹脂ブロックの適所に、補強用の梁が配置されてなる、請求項1ないし請求項5のいずれか一項に記載の上下水槽開口部の覆蓋構造。The upper and lower water tank opening according to any one of claims 1 to 5, wherein a reinforcing beam is disposed at an appropriate position of the honeycomb-like structure or the foamed resin block disposed between the two thin plates. Cover structure.
JP2002365976A 2002-12-18 2002-12-18 Cover structure of vertical tank opening Pending JP2004196339A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008024340A (en) * 2006-07-21 2008-02-07 Sekisui Chem Co Ltd Cover member
CN104652596A (en) * 2013-11-20 2015-05-27 北京泰宁科创雨水利用技术股份有限公司 Rainwater bio-retention filtering device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008024340A (en) * 2006-07-21 2008-02-07 Sekisui Chem Co Ltd Cover member
CN104652596A (en) * 2013-11-20 2015-05-27 北京泰宁科创雨水利用技术股份有限公司 Rainwater bio-retention filtering device

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