JP2004089758A - Filter medium, manufacturing method therefor and filter apparatus having filter medium mounted therein in freely replaceable manner - Google Patents

Filter medium, manufacturing method therefor and filter apparatus having filter medium mounted therein in freely replaceable manner Download PDF

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JP2004089758A
JP2004089758A JP2002250944A JP2002250944A JP2004089758A JP 2004089758 A JP2004089758 A JP 2004089758A JP 2002250944 A JP2002250944 A JP 2002250944A JP 2002250944 A JP2002250944 A JP 2002250944A JP 2004089758 A JP2004089758 A JP 2004089758A
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filter material
filter
filter medium
longitudinal direction
rigid frame
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JP4182332B2 (en
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Yoshiyuki Nakamura
中村　善幸
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Japan Vilene Co Ltd
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Japan Vilene Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/20—Shape of filtering material
    • B01D2275/203—Shapes flexible in their geometry, e.g. bendable, adjustable to a certain size

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter medium having a simple structure capable of being simply mounted on a rigid frame, not falling from the rigid frame at the time of mounting and hard to generate an air leak between the rigid frame and the filter medium, a manufacturing method therefore and a filter apparatus having the filter medium in a freely replaceable manner. <P>SOLUTION: In the filter medium, tapes 103 having tensile force are fixed to both end parts 102a of the filter medium 102 in the width direction thereof in such a state that the filter medium 102 subjected to longitudinal pleating processing and having compression elasticity is longitudinally compressed and both end parts 102b in the longitudinal direction of the filter medium 102 are outwardly expanded and curved by the restoring force due to the compression elasticity of the filter medium 102. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、フィルタ材、及びその製造方法、並びにフィルタ材を取り替え自在に装着したフィルタ装置に関する。詳細には構造が簡単で、簡単に剛性枠への装着ができ、しかも装着時には、剛性枠から脱落することがなく、剛性枠との間でエアーリークが発生し難いフィルタ材、及びその製造方法、並びにフィルタ材を取り替え自在に装着したフィルタ装置に関する。
【０００２】
【従来の技術及び発明が解決しようとする課題】
従来、フィルタ材を取り替え自在に装着したフィルタ装置としては、例えば実開平０６−３９１０９号公報に記載のものがある。このフィルタ装置１は、図７に示すように、プリーツ折り加工されたフィルタ材２を剛性枠３に取り替え自在に装着したものであり、前記フィルタ材２の長手方向両端部の折りひだがヒートシールされており、このヒートシール部４が剛性枠３の両側壁の流出側に間隔をおいて設けたリブ５と剛性枠３の側壁との間に差し入れられて抜け止め状態となって、該フィルタ材２が剛性枠３から脱落しないようになっていた。
【０００３】
ところが、このフィルタ装置１にあっては、フィルタ材２が剛性枠３から脱落しない構造とするために、フィルタ材２や剛性枠３にヒートシール部４やリブ５を設ける必要があり、その分、フィルタ材２や剛性枠３の製作工程が増えると共にそれらの構造が複雑になるという課題があった。
【０００４】
またこのフィルタ装置１にあっては、リブ５と剛性枠３側壁の僅かな隙間にフィルタ材２のヒートシール部４を差し入れることでフィルタ材２の脱落を防止するようになっているので、剛性枠３とリブ５の隙間やヒートシール部４の寸法精度を高くする必要があった。
【０００５】
一方、フィルタ材を取り替え自在に装着したフィルタ装置には、特開平１０−３２８５１７号公報に記載のものもある。このフィルタ装置１１は、図８及び図９に示すように、合成樹脂からなる周囲壁に内向きつば１６を設けた枠体１５の内側に、プリーツ折り加工された濾材１４の長手方向両端部に柔軟な材料からなる帯板材の側片１３を固着したフィルタ材１２を前記内向きつば１６によって抑止して装着するようにしたものである。
【０００６】
このフィルタ装置１１にあっては、フィルタ材１２が長手方向上向き及び下向きに湾曲可能で、かつ幅方向にも内向きに湾曲可能となっており、装着時にはこのフィルタ材１２を湾曲させながら、枠体１５の内向きつば１６の下側に差し込み、差し入れた後はフィルタ材１２自体の復元力でフィルタ材１２が枠体１５内に気密に装着されるようになっていた。
【０００７】
ところが、このフィルタ装置１１にあっては、フィルタ材１２が長手方向上向き及び下向きに湾曲可能で、かつ幅方向にも内向きに湾曲可能となっていることから、変形し易く、このため、使用時に枠体１５との間にエアーリークが発生しやすいという問題があった。
【０００８】
本発明は、このような問題に鑑みなされたものであり、構造が簡単で、簡単に剛性枠への装着ができ、しかも装着時には、剛性枠から脱落することがなく、剛性枠との間でエアーリークが発生し難いフィルタ材、及びその製造方法、並びにフィルタ材を取り替え自在に装着したフィルタ装置を提供することを目的とするものである。
【０００９】
【課題を解決するための手段】
上記目的を達成するため、請求項１記載の発明は、長手方向にプリーツ折り加工された圧縮弾性を有する濾材を長手方向に圧縮させた状態で前記濾材の幅方向両端部に抗張力を有するテープが固着されていて、前記濾材の圧縮弾性による復元力で前記濾材の長手方向両端部が外側方向に膨らんで湾曲していることを特徴とするフィルタ材をその要旨とした。
【００１０】
請求項２記載の発明は、濾材が５０％以上の圧縮弾性率を有することを特徴とする請求項１に記載のフィルタ材をその要旨とした。
【００１１】
請求項３記載の発明は、濾材の圧縮時長さが該フィルタを装着する剛性枠の装着部分の長さに対応していることを特徴とするフィルタ材をその要旨とした。
【００１２】
請求項４記載の発明は、テープがボール紙、プラスチック板、不織布のいずれか、またはこれらの複合物からなることを特徴とするフィルタ材をその要旨とした。
【００１３】
請求項５記載の発明は、濾材の長手方向に線状のセパレータが付着していることを特徴とするフィルタ材をその要旨とした。
【００１４】
請求項６記載の発明は、セパレータが発泡タイプのホットメルト樹脂からなることを特徴とするフィルタ材をその要旨とした。
【００１５】
請求項７記載の発明は、請求項１〜６に記載のフィルタ材を剛性枠に取り替え自在に装着したことを特徴とするフィルタ装置をその要旨とした。
【００１６】
請求項８記載の発明は、長手方向にプリーツ折り加工された圧縮弾性を有する濾材を長手方向に圧縮させ、この状態で前記濾材の幅方向両端部に抗張力を有するテープを固着することを特徴とするフィルタ材の製造方法をその要旨とした。
【００１７】
請求項９記載の発明は、長手方向にプリーツ折り加工された圧縮弾性を有する濾材の長手方向に線状のセパレータを付着した後、前記濾材を長手方向に圧縮させることを特徴とするフィルタ材の製造方法をその要旨とした。
【００１８】
【発明の実施の形態】
以下、本発明のフィルタ材、及びその製造方法、並びにフィルタ材を取り替え自在に装着したフィルタ装置を図面に示した一実施の形態に従ってさらに詳しく説明する。図１〜図３は本発明のフィルタ材の製造過程を示し、図４は図１〜図３に示す製造過程を経て得られたフィルタ材を示している。
【００１９】
図１〜図３に示すように、本発明のフィルタ材は、長手方向にプリーツ折り加工された圧縮弾性を有する濾材を長手方向に圧縮させ、この状態で濾材の幅方向両端部に抗張力を有するテープを固着することで製造されている。
【００２０】
本発明のフィルタ材１００を構成する濾材１０２は、例えば不織布や紙、ガラス繊維紙など折り加工後の形状が容易に崩れない程度の保形性と、圧縮させた後に再び元の形状に復元する圧縮弾性とを有する紙状物を素材としている。濾材１０２は長手方向にプリーツ折り加工を施し、さらに必要に応じてＶ状、Ｗ状といったジグザク形状に折加工することで所定の濾過面積を確保したものである。
【００２１】
本発明のフィルタ材１００を構成する濾材１０２の圧縮弾性率としては、５０％以上が好ましく、７０％以上がより好ましく、９０％以上が更に好ましい。濾材１０２の圧縮弾性率が５０％を下回るとき、圧縮弾性力による復元力を利用したフィルタ材の剛性枠への装着安定性が不十分となる。
【００２２】
尚、圧縮弾性率の測定は、以下の試験方法によるものである。
【００２３】
（圧縮弾性率の測定方法）
５ｃｍ角の試験片を１０枚重ね、その試験片上に５０ｇの荷重をかけ、そのときの厚さ（Ａ）を測定する。次に、この試験片に５ｋｇの荷重を１分間かけ、そのときの厚さ（Ｂ）を測定する。次に、試験片上から５ｋｇの荷重を取り除き、１分間放置した上で、再び試験片上に５０ｇの荷重をかけ、そのときの厚さ（Ｃ）を測定する。測定した（Ａ）（Ｂ）（Ｃ）の厚さにより、下記式に基いて圧縮弾性率を求める。
【００２４】
圧縮弾性率（％）＝（Ｃ−Ｂ）÷（Ａ−Ｂ）×１００
この濾材１０２には、図１〜図４に示すように長手方向に線状のセパレータ１０４を付着させることもできる。セパレータ１０４は合成樹脂、好ましくはホットメルト樹脂からなり、これが濾材１０２の長手方向に連続または間欠した線状に付着して、濾材１０２の折りひだ相互の間隔が保持されるのである。　図１〜図４に示す形態では、プリーツ折り加工後の濾材１０２を再び平板状に伸ばし、この状態で濾材１０２の幅方向に平行して４本の間欠した線状のセパレータ１０４を付着させている。また、図面に示す例では濾材１０２の表裏にそれぞれにセパレータ１０４を付着させている。
【００２５】
尚、ホットメルト樹脂からなるセパレータ１０４を濾材１０２に付着させる場合、使用するホットメルト樹脂としては、融点が１００〜２００℃のものが好ましく、１００〜１４０℃のものがより好ましい。
【００２６】
また、濾材１０２にセパレータ１０４を付着させる場合、ホットメルト樹脂を窒素ガスで発泡させるなどして得られる発泡タイプのセパレータ１０４を用いることもできる。この場合、濾材１０２の圧縮弾性力のほかに、セパレータ１０４の持つ圧縮弾性力を利用することができる。
【００２７】
次いで、図２に示すようにプリーツ折り加工した濾材１０２をさらに長手方向に圧縮させ、この状態で濾材１０２の幅方向両端部に抗張力を有するテープ１０３を固着するのである。
【００２８】
図２及び図３に示すように、テープ１０３は、ボール紙、プラスチック板、不織布のいずれか、またはこれらの複合物など抗張力を有する素材からなり、前記濾材１０２を圧縮させたときの濾材１０２の長さ及び折りひだの高さに対応する幅を有するものであり、濾材１０２の幅方向両端部１０２ａ全体を覆うようになっている。
【００２９】
このテープ１０３の濾材１０２の幅方向両端部１０２ａへの固着は、例えば図２及び図３に示すように、プリーツ折り加工された濾材１０２を長手方向両側から（一方側からでもよい。）圧縮させ、この状態で後述する剛性枠１１０と同じ長さ（内寸）を有する型枠１０６内に嵌め込んで、濾材１０２の長手方向両端部１０２ａを圧縮状態に保持する。この後、濾材１０２の幅方向両端部１０２ａにテープ１０３を接着剤（図示しない）を介して重ね合わせ、これを幅方向両端側から加熱板１０５で加熱加圧するという方法で行うことができる。これにより、濾材１０２の幅方向両端部１０２ａにテープ１０３が固着された本発明のフィルタ材１００を得ることができるのである。尚、型枠１０６は、一例として図２に示すように断面コ字型をしていてもよい。
【００３０】
前記濾材１０２を圧縮させる度合いとしては、プリーツ折り加工後の長さ（ｌ０）と、濾材１０２の圧縮時長さ（ｌ１）との差が、濾材１０２の圧縮時長さ（ｌ１）に対して１〜５％とするのが好ましく（例えばｌ１が２００ｍｍのとき、ｌ０との間で２〜１０ｍｍの長さの差があることが好ましく）、さらに好ましくは１〜２．５％である。濾材１０２の圧縮時長さ（ｌ１）とプリーツ折り加工後の長さ（ｌ０）との差が上記範囲よりも大きくなると、隣り合う折りひだ同志の間隔が狭くなり、濾過面積を有効に確保することができなくなる。一方、圧縮時長さ（ｌ１）とプリーツ折り加工後の長さ（ｌ０）との差が上記範囲よりも小さくなると、濾材１０２の圧縮弾性による復元力が小さくなるので、フィルタ材１００の剛性枠１１０への装着安定性が損なわれることになる。このため、濾材１０２を圧縮させる度合いは、濾材１０２の大きさや形状、濾過面積、圧縮弾性の大小などを考慮して適宜決定すると良い。
【００３１】
また、濾材１０２を圧縮させる場合、フィルタ材１００が剛性枠１１０に確実に装着できるよう、剛性枠１１０の装着部分の長さを考慮して、濾材１０２の圧縮時長さ（ｌ１）を剛性枠１１０の装着部分の長さに対応させるのが望ましい。というのは濾材１０２の圧縮時長さ（ｌ１）は、濾材１０２の幅方向両端部１０２ａではテープ１０３によって固定されるので、濾材１０２の圧縮時長さ（ｌ１）が剛性枠１１０の装着部分の長さよりも長いと、フィルタ材１００が剛性枠１１０に装着できないことになり、濾材１０２の圧縮時長さ（ｌ１）が剛性枠１１０の装着部分の長さよりも極端に短い場合には、フィルタ材１００を剛性枠１１０に装着したときに、濾材１０２の圧縮弾性による復元力によって生ずる剛性枠１１０への密着効果が得られず、フィルタ１００が簡単に外れてしまうことになるからである。
【００３２】
またテープ１０３には、ホットメルト樹脂を塗布しておいてもよく、この場合、テープ１０３を濾材１０２の幅方向両端部１０２ａに重ね合わせ、これを加熱板１０５で加熱加圧することで、テープ１０３の補強と濾材１０２の幅方向両端部１０２ａへの固着とを同時に行うことができるというメリットがある。
【００３３】
尚、上記形態で使用するホットメルト樹脂としては、融点が１００〜２００℃のものが好ましく、１００〜１４０℃のものがより好ましい。また、ホットメルト樹脂を加熱加圧は、２００℃で１０〜２０秒、０．１〜５ｋＰａなどの実施条件で行うのがよい。
【００３４】
このようにして得られたフィルタ材１００は、図４に示すように、濾材１０２のプリーツ形状が幅方向両端部１０２ａに固着するテープ１０３で保持されると同時に、濾材１０２の長手方向両端部１０２ｂの前記テープ１０３により拘束されていない部分（濾材１０２の幅方向中央部分）が、濾材１０２の圧縮弾性による復元力で外側に膨らんで湾曲している。
【００３５】
このため、フィルタ材１００にあっては、濾材１０２の長手方向両端部１０２ｂに外側から内側に向かって外力を加えたとき、前記湾曲形状が直線形状に変形可能な圧縮弾性を有することになる。
【００３６】
本発明のフィルタ装置は、上述のフィルタ材１００を剛性枠１１０に取り替え自在に装着したことを特徴とするものである。
【００３７】
図５（ａ）（ｂ）に示す剛性枠１１０は、濾材１０２の幅方向両端部１０２ｂの長さ（ｌ１）と同じ、若しくはやや大きな長さを有すると共に、枠の空気流出側に沿って鍔１１１を設けたものである。そして、前述のフィルタ材１００の長手方向両端部、すなわち濾材１０２の長手方向両端部１０２ｂに外側から内側に向かって外力を加えて、両端部を幅方向両端部１０２ｂの長さ（ｌ１）と同じ長さ、すなわち直線状とし、この状態でフィルタ材１００を、図５（ａ）（ｂ）に示す剛性枠１１０内に装着するのである。
【００３８】
剛性枠１１０内に装着されたフィルタ材１００は、その空気流出側が剛性枠１１０の空気流出側に沿って設けた鍔１１１に保持されるようになっている。またフィルタ材１００は、濾材１０２の圧縮弾性による復元力によって剛性枠１１０内に押し付けられて密着するようになっている。このため、この部分でのエアーリークがなくなり、フィルタ材１００が剛性枠１１０内に確実に保持されるようになっている。
【００３９】
前記剛性枠１１０の鍔１１１は、図５に示すように、枠１１０周囲の空気流出側全周に設けているが、剛性枠１１０のコーナー部分や中央部分など、部分的に設けても良い。また鍔１１１は、空気の流通を阻害しない範囲で格子状やストライプ状などの形態を採ることもできる。
【００４０】
また、剛性枠１１０内にはパッキンを設けてもよく、この場合、この剛性枠１１０内にフィルタ材１００を装着したときに、フィルタ材１００の長手方向両端部が復元力で剛性枠１１０内に密着するのと同時に、フィルタ材１００の長手方向両端部と剛性枠１１０との間にパッキンが介在し、より効果的にエアーリークの防止を計ることができる。
【００４１】
尚、本発明は、上記例に限定されず、例えば濾材やテープの種類や大きさ、折形状をフィルタ材の大きさや使用形態に応じて任意に設定したり、濾材の幅方向両端部に固着されるテープを断面コ字型とするなど、「特許請求の範囲」に記載された範囲で自由に変更して実施することが出来る。
【００４２】
【発明の効果】
本発明のフィルタ材、並びにこれを剛性枠に装着したフィルタ装置にあっては、該フィルタ材が、長手方向にプリーツ折り加工された圧縮弾性を有する濾材に、前記濾材を長手方向に圧縮させた状態で前記濾材の幅方向両端部に抗張力を有するテープが固着されてなり、極めて簡単な構造となっている。
【００４３】
本発明のフィルタ材、並びにこれを剛性枠に装着したフィルタ装置にあっては、該フィルタ材が、濾材の圧縮弾性による復元力で前記濾材の長手方向両端部が外側方向に膨らんで湾曲していることから、該フィルタ材の長手方向両端部に外側から内側に向かって外力を加えて、両端部を直線状とし、この状態で該フィルタ材を剛性枠内に装着するといった具合に簡単な操作でフィルタ材を剛性枠へ取り替え自在に装着できる。
【００４４】
また、このフィルタ材、並びにこれを剛性枠に装着したフィルタ装置にあっては、該フィルタ材を剛性枠に装着したとき、該フィルタ材が、濾材の圧縮弾性による復元力によって剛性枠内に押し付けられて密着するようになっており、このため、フィルタ材が剛性枠から脱落することがなく、剛性枠との間でエアーリークが発生し難いという効果を奏する。
【００４５】
本発明のフィルタ材の製造方法は、長手方向にプリーツ折り加工された圧縮弾性を有する濾材を長手方向に圧縮させ、この状態で前記濾材の幅方向両端部に抗張力を有するテープを固着するという簡単な工程によって上述の優れた効果を奏するフィルタ材を得ることができる。
【図面の簡単な説明】
【図１】図１は本発明のフィルタ材の製造過程を示し、プリーツ折り加工した濾材を示す平面図。
【図２】図２は本発明のフィルタ材の製造過程を示し、プリーツ折り加工した濾材を圧縮させ、型枠内に嵌め込んだ状態を示す平面図。
【図３】図３は本発明のフィルタ材の製造過程を示し、型枠内に嵌め込んだ濾材の幅方向両端部にテープを積層して固着させている状態を示す平面図。
【図４】図４は本発明のフィルタ材を示す平面図。
【図５】図５は剛性枠を示し、（ａ）は剛性枠の平面図、（ｂ）は剛性枠の断面図。
【図６】図６本発明のフィルタ装置を示し、（ａ）はフィルタ装置の平面図。（ｂ）はフィルタ装置の断面図。
【図７】図７は従来のフィルタ装置を示す平面図。
【図８】図８は従来のフィルタ装置の別例を示す斜視図。
【図９】図９は図８の要部平面図。
【符号の説明】
１００・・・フィルタ材
１０２・・・濾材
１０２ａ・・・濾材天地部
１０３・・・テープ
１０４・・・セパレータ
１０５・・・加熱板
１０６・・・型枠
１１０・・・剛性枠
１１１・・・鍔[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a filter material, a method for manufacturing the same, and a filter device in which the filter material is replaceably mounted. In detail, the filter material has a simple structure, can be easily mounted on the rigid frame, and does not drop off from the rigid frame at the time of mounting, and does not easily cause air leak between the filter frame and the manufacturing method thereof. And a filter device in which filter materials are exchangeably mounted.
[0002]
Problems to be solved by the prior art and the invention
2. Description of the Related Art Conventionally, as a filter device in which filter materials are interchangeably mounted, for example, there is a filter device described in Japanese Utility Model Laid-Open No. 06-39109. As shown in FIG. 7, the filter device 1 is provided with a pleated folded filter material 2 which is replaceably mounted on a rigid frame 3. The heat seal portion 4 is inserted between a rib 5 provided on the outflow side of both side walls of the rigid frame 3 and a side wall of the rigid frame 3 so as to prevent the filter from coming off. The material 2 was prevented from falling off the rigid frame 3.
[0003]
However, in the filter device 1, it is necessary to provide the heat seal portion 4 and the rib 5 on the filter material 2 and the rigid frame 3 in order to prevent the filter material 2 from falling off from the rigid frame 3. In addition, there is a problem that the number of manufacturing steps of the filter material 2 and the rigid frame 3 increases and their structures become complicated.
[0004]
Further, in this filter device 1, since the heat sealing portion 4 of the filter material 2 is inserted into a slight gap between the rib 5 and the side wall of the rigid frame 3, the filter material 2 is prevented from falling off. It is necessary to increase the dimensional accuracy of the gap between the rigid frame 3 and the ribs 5 and the heat seal portion 4.
[0005]
On the other hand, a filter device in which filter materials are interchangeably mounted is described in Japanese Patent Application Laid-Open No. 10-328517. As shown in FIGS. 8 and 9, the filter device 11 is provided inside a frame 15 provided with an inward flange 16 on a peripheral wall made of a synthetic resin, and on both ends in the longitudinal direction of a pleated filter medium 14. The filter material 12 to which the side piece 13 of the strip material made of a flexible material is fixed is restrained by the inward flange 16 and is mounted.
[0006]
In this filter device 11, the filter material 12 can be bent upward and downward in the longitudinal direction, and can be bent inward also in the width direction. The filter member 12 is inserted under the inward flange 16 of the body 15, and after the insertion, the filter material 12 is hermetically mounted in the frame 15 by the restoring force of the filter material 12 itself.
[0007]
However, in the filter device 11, since the filter material 12 can be bent upward and downward in the longitudinal direction and can be bent inward also in the width direction, the filter material 12 is easily deformed. There has been a problem that air leaks easily occur between the frame and the frame 15.
[0008]
The present invention has been made in view of such a problem, and has a simple structure, can be easily mounted on a rigid frame, and does not fall off from the rigid frame at the time of mounting. It is an object of the present invention to provide a filter material in which air leak hardly occurs, a method of manufacturing the filter material, and a filter device in which the filter material is replaceably mounted.
[0009]
[Means for Solving the Problems]
To achieve the above object, the invention according to claim 1 is a tape having tensile strength at both ends in the width direction of the filter medium in a state where the filter medium having compression elasticity pleated in the longitudinal direction is compressed in the longitudinal direction. The gist of the present invention is a filter material which is fixed and characterized in that both ends in the longitudinal direction of the filter material expand outward and are curved by a restoring force due to the compression elasticity of the filter material.
[0010]
The gist of the invention according to claim 2 is that the filter medium has a compression modulus of 50% or more.
[0011]
According to a third aspect of the present invention, there is provided a filter material, wherein the compressed length of the filter material corresponds to the length of a mounting portion of a rigid frame on which the filter is mounted.
[0012]
The gist of the invention according to claim 4 is a filter material characterized in that the tape is made of any of cardboard, plastic plate, nonwoven fabric, or a composite thereof.
[0013]
The invention according to claim 5 has a gist of a filter material, wherein a linear separator is attached in a longitudinal direction of the filter material.
[0014]
According to a sixth aspect of the invention, there is provided a filter material, wherein the separator is formed of a foaming type hot melt resin.
[0015]
The gist of the invention according to claim 7 is a gist of a filter device characterized in that the filter material according to claims 1 to 6 is exchangeably mounted on a rigid frame.
[0016]
The invention according to claim 8 is characterized in that a filter medium having compression elasticity pleated in the longitudinal direction is compressed in the longitudinal direction, and a tape having tensile strength is fixed to both ends in the width direction of the filter medium in this state. The gist of the present invention is a method of manufacturing a filter material.
[0017]
According to a ninth aspect of the present invention, there is provided a filter material, wherein a linear separator is attached in a longitudinal direction of a filter material having compression elasticity which is pleated in a longitudinal direction, and then the filter material is compressed in the longitudinal direction. The manufacturing method is the gist.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a filter material of the present invention, a manufacturing method thereof, and a filter device in which the filter material is replaceably mounted will be described in more detail with reference to an embodiment shown in the drawings. 1 to 3 show a manufacturing process of the filter material of the present invention, and FIG. 4 shows a filter material obtained through the manufacturing process shown in FIGS.
[0019]
As shown in FIGS. 1 to 3, the filter material of the present invention compresses in the longitudinal direction a filter material having compression elasticity which has been pleated in the longitudinal direction, and in this state, has a tensile strength at both ends in the width direction of the filter material. It is manufactured by attaching a tape.
[0020]
The filter material 102 constituting the filter material 100 of the present invention has a shape retaining property such that the shape after folding such as nonwoven fabric, paper, or glass fiber paper does not easily collapse, and restores the original shape again after compression. The material is a paper-like material having compression elasticity. The filter medium 102 is provided with a predetermined filtering area by performing pleat folding in the longitudinal direction and, further, zigzag shapes such as V-shape and W-shape as necessary.
[0021]
The compression modulus of the filter medium 102 constituting the filter medium 100 of the present invention is preferably 50% or more, more preferably 70% or more, and even more preferably 90% or more. When the compression modulus of the filter medium 102 is less than 50%, the mounting stability of the filter medium to the rigid frame using the restoring force due to the compression elastic force becomes insufficient.
[0022]
In addition, the measurement of the compression elastic modulus is based on the following test method.
[0023]
(Method of measuring compression modulus)
Ten test pieces of 5 cm square are stacked, a load of 50 g is applied on the test pieces, and the thickness (A) at that time is measured. Next, a load of 5 kg is applied to the test piece for 1 minute, and the thickness (B) at that time is measured. Next, a load of 5 kg is removed from the test piece, left for 1 minute, and then a load of 50 g is applied again on the test piece, and the thickness (C) at that time is measured. Based on the measured thicknesses of (A), (B), and (C), the compression modulus is determined based on the following equation.
[0024]
Compression modulus (%) = (CB) − (AB) × 100
As shown in FIGS. 1 to 4, a linear separator 104 can be attached to the filter medium 102 in the longitudinal direction. The separator 104 is made of a synthetic resin, preferably a hot-melt resin, and adheres in a continuous or intermittent line shape in the longitudinal direction of the filter medium 102, so that the interval between the folds of the filter medium 102 is maintained. In the embodiment shown in FIGS. 1 to 4, the filter material 102 after the pleating process is stretched again into a flat plate shape, and in this state, four intermittent linear separators 104 are attached in parallel with the width direction of the filter material 102. I have. In the example shown in the drawing, separators 104 are attached to the front and back of the filter medium 102, respectively.
[0025]
When the separator 104 made of a hot melt resin is attached to the filter medium 102, the hot melt resin to be used preferably has a melting point of 100 to 200C, more preferably 100 to 140C.
[0026]
When the separator 104 is attached to the filter medium 102, a foam type separator 104 obtained by foaming a hot melt resin with nitrogen gas or the like can also be used. In this case, the compressive elastic force of the separator 104 can be used in addition to the compressive elastic force of the filter medium 102.
[0027]
Next, as shown in FIG. 2, the pleated filter medium 102 is further compressed in the longitudinal direction, and in this state, a tape 103 having tensile strength is fixed to both ends of the filter medium 102 in the width direction.
[0028]
As shown in FIGS. 2 and 3, the tape 103 is made of a material having a high tensile strength such as cardboard, a plastic plate, a nonwoven fabric, or a composite thereof, and the tape 103 is compressed when the filter 102 is compressed. It has a width corresponding to the length and the height of the fold, and covers the entire width direction both end portions 102 a of the filter medium 102.
[0029]
The fixing of the tape 103 to the both ends 102a of the filter medium 102 in the width direction is performed by compressing the pleated-folded filter medium 102 from both sides in the longitudinal direction (or from one side), as shown in FIGS. In this state, the filter member 102 is fitted in a mold 106 having the same length (inner dimension) as a rigid frame 110 described later, and both ends 102a in the longitudinal direction of the filter medium 102 are kept in a compressed state. Thereafter, the tape 103 can be overlaid on both ends 102a in the width direction of the filter medium 102 via an adhesive (not shown), and heated and pressed by the heating plate 105 from both ends in the width direction. As a result, it is possible to obtain the filter material 100 of the present invention in which the tape 103 is fixed to both ends 102a in the width direction of the filter material 102. The mold 106 may have a U-shaped cross section as shown in FIG. 2 as an example.
[0030]
As for the degree of compressing the filter medium 102, the difference between the length (l 0 ) after the pleating process and the compressed length (l 1 ) of the filter medium 102 is the compressed length (l 1 ) of the filter medium 102. (E.g., when l 1 is 200 mm, it is preferable that there be a length difference of 2 to 10 mm from l 0 ), and more preferably 1 to 2.5% %. If the difference between the compressed length (l 1 ) of the filter medium 102 and the length (l 0 ) after the pleated processing is larger than the above range, the interval between adjacent folded folds is reduced, and the filtration area is effectively reduced. It cannot be secured. On the other hand, when the difference between the compressed length (l 1 ) and the length after the pleated folding (l 0 ) is smaller than the above range, the restoring force due to the compression elasticity of the filter medium 102 is reduced. The mounting stability to the rigid frame 110 will be impaired. For this reason, the degree of compression of the filter medium 102 may be appropriately determined in consideration of the size and shape of the filter medium 102, the filtration area, the magnitude of compression elasticity, and the like.
[0031]
When the filter medium 102 is compressed, the compression length (l 1 ) of the filter medium 102 is set to be rigid in consideration of the length of the mounting portion of the rigid frame 110 so that the filter medium 100 can be securely mounted to the rigid frame 110. It is desirable to make the length correspond to the length of the mounting portion of the frame 110. This is because the compression length (l 1 ) of the filter medium 102 is fixed by the tape 103 at both ends 102 a in the width direction of the filter medium 102, so that the compression length (l 1 ) of the filter medium 102 is If the length is longer than the length of the portion, the filter material 100 cannot be mounted on the rigid frame 110. If the compressed length (l 1 ) of the filter material 102 is extremely shorter than the length of the mounted portion of the rigid frame 110, This is because, when the filter material 100 is mounted on the rigid frame 110, the filter 100 cannot be easily brought into contact with the rigid frame 110 due to the restoring force due to the compression elasticity of the filter material 102, so that the filter 100 is easily detached. .
[0032]
The tape 103 may be coated with a hot melt resin. In this case, the tape 103 is overlapped on both ends 102 a in the width direction of the filter medium 102, and the tape 103 is heated and pressed by a heating plate 105, so that the tape 103 is heated. This has the advantage that the reinforcement of the filter medium 102 and the fixation of the filter medium 102 to both ends 102a in the width direction can be performed at the same time.
[0033]
The hot melt resin used in the above embodiment preferably has a melting point of 100 to 200C, more preferably 100 to 140C. The heating and pressurization of the hot melt resin is preferably performed at 200 ° C. for 10 to 20 seconds and under conditions such as 0.1 to 5 kPa.
[0034]
As shown in FIG. 4, the filter material 100 thus obtained is held by the tape 103 that fixes the pleated shape of the filter material 102 to the both ends 102a in the width direction, and at the same time, both ends 102b in the longitudinal direction of the filter material 102. The portion not restrained by the tape 103 (the central portion in the width direction of the filter medium 102) bulges outward and is curved by the restoring force due to the compression elasticity of the filter medium 102.
[0035]
Therefore, in the filter material 100, when an external force is applied from the outside to the inside at both ends 102b in the longitudinal direction of the filter material 102, the curved shape has a compressive elasticity capable of being deformed into a linear shape.
[0036]
The filter device of the present invention is characterized in that the above-described filter material 100 is mounted on a rigid frame 110 so as to be freely replaceable.
[0037]
The rigid frame 110 shown in FIGS. 5A and 5B has a length (l 1 ) which is the same as or slightly larger than the length (l 1 ) of both ends 102b in the width direction of the filter medium 102, and extends along the air outflow side of the frame. A flange 111 is provided. Then, an external force is applied to both ends in the longitudinal direction of the filter material 100, that is, both ends 102b in the longitudinal direction of the filter medium 102 from the outside to the inside, so that both ends have the length (l 1 ) of both ends 102b in the width direction. In this state, the filter material 100 is mounted in the rigid frame 110 shown in FIGS. 5A and 5B.
[0038]
The filter material 100 mounted in the rigid frame 110 has its air outflow side held by a flange 111 provided along the air outflow side of the rigid frame 110. Further, the filter material 100 is pressed into the rigid frame 110 by the restoring force due to the compression elasticity of the filter material 102 so as to be in close contact therewith. Therefore, air leaks at this portion are eliminated, and the filter material 100 is securely held in the rigid frame 110.
[0039]
As shown in FIG. 5, the flange 111 of the rigid frame 110 is provided on the entire periphery of the frame 110 on the air outflow side. However, the flange 111 may be provided partially, such as a corner portion or a central portion of the rigid frame 110. In addition, the flange 111 can take a form such as a lattice shape or a stripe shape as long as the air flow is not hindered.
[0040]
Further, packing may be provided in the rigid frame 110. In this case, when the filter material 100 is mounted in the rigid frame 110, both ends in the longitudinal direction of the filter material 100 are placed in the rigid frame 110 by restoring force. At the same time, the packing is interposed between both ends of the filter material 100 in the longitudinal direction and the rigid frame 110, so that the air leak can be more effectively prevented.
[0041]
In addition, the present invention is not limited to the above-described example. For example, the type and size of the filter medium and the tape, the folded shape may be arbitrarily set according to the size and use mode of the filter medium, or may be fixed to both ends in the width direction of the filter medium For example, the tape to be formed may have a U-shaped cross section, and may be freely modified within the scope described in the claims.
[0042]
【The invention's effect】
In the filter material of the present invention, and the filter device in which the filter material is mounted on a rigid frame, the filter material is compressed in the longitudinal direction into a filter material having compression elasticity that is pleated in the longitudinal direction. In this state, a tape having tensile strength is fixed to both ends in the width direction of the filter medium, and the structure is extremely simple.
[0043]
In the filter material of the present invention, as well as in the filter device in which the filter material is mounted on a rigid frame, the filter material is curved such that both ends in the longitudinal direction of the filter material expand outwardly due to the restoring force due to the compression elasticity of the filter material. Therefore, an external force is applied from the outside to the inside in the longitudinal direction both ends of the filter material to make both ends straight, and the filter material is mounted in the rigid frame in this state. The filter material can be freely replaced by a rigid frame.
[0044]
Further, in the filter material and the filter device in which the filter material is mounted on a rigid frame, when the filter material is mounted on the rigid frame, the filter material is pressed into the rigid frame by a restoring force due to the compression elasticity of the filter material. As a result, the filter material does not fall out of the rigid frame, and an air leak is less likely to occur between the filter material and the rigid frame.
[0045]
The method for producing a filter material of the present invention is a simple method of compressing a filter material having compression elasticity pleated in the longitudinal direction and compressing the filter material in both ends in the width direction of the filter material in this state. By a simple process, it is possible to obtain a filter material having the above-described excellent effects.
[Brief description of the drawings]
FIG. 1 is a plan view showing a manufacturing process of a filter material of the present invention and showing a pleated-folded filter material.
FIG. 2 is a plan view showing a manufacturing process of the filter material of the present invention, showing a state where the pleated-folded filter material is compressed and fitted into a mold.
FIG. 3 is a plan view showing a manufacturing process of the filter material of the present invention, in which a tape is laminated and fixed to both ends in the width direction of the filter material fitted in a mold.
FIG. 4 is a plan view showing a filter material of the present invention.
5A and 5B show a rigid frame, FIG. 5A is a plan view of the rigid frame, and FIG. 5B is a cross-sectional view of the rigid frame.
FIG. 6 shows a filter device of the present invention, wherein (a) is a plan view of the filter device. (B) is sectional drawing of a filter apparatus.
FIG. 7 is a plan view showing a conventional filter device.
FIG. 8 is a perspective view showing another example of the conventional filter device.
FIG. 9 is a plan view of a main part of FIG. 8;
[Explanation of symbols]
100 filter material 102 filter medium 102a filter medium top and bottom 103 tape 104 separator 105 heating plate 106 mold 110 rigid frame 111 Tsuba

Claims (9)

長手方向にプリーツ折り加工された圧縮弾性を有する濾材を長手方向に圧縮させた状態で前記濾材の幅方向両端部に抗張力を有するテープが固着されていて、前記濾材の圧縮弾性による復元力で前記濾材の長手方向両端部が外側方向に膨らんで湾曲していることを特徴とするフィルタ材。A tape having tensile strength is fixed to both ends in the width direction of the filter medium in a state where the filter medium having compressive elasticity that has been pleated in the longitudinal direction is compressed in the longitudinal direction. A filter material characterized in that both ends in the longitudinal direction of the filter material bulge outward and are curved. 濾材が５０％以上の圧縮弾性率を有することを特徴とする請求項１に記載のフィルタ材。The filter medium according to claim 1, wherein the filter medium has a compression modulus of 50% or more. 濾材の圧縮時長さが該フィルタを装着する剛性枠の装着部分の長さに対応していることを特徴とする請求項１に記載のフィルタ材。The filter material according to claim 1, wherein a length of the filter material when compressed corresponds to a length of a mounting portion of a rigid frame to which the filter is mounted. テープがボール紙、プラスチック板、不織布のいずれか、またはこれらの複合物からなることを特徴とする請求項１〜３のいずれかに記載のフィルタ材。The filter material according to any one of claims 1 to 3, wherein the tape is made of any of cardboard, a plastic plate, a nonwoven fabric, or a composite thereof. 濾材の長手方向に線状のセパレータが付着していることを特徴とする請求項１〜４のいずれかに記載のフィルタ材。The filter material according to any one of claims 1 to 4, wherein a linear separator is attached in a longitudinal direction of the filter material. セパレータが発泡タイプのホットメルト樹脂からなることを特徴とする請求項５に記載のフィルタ材。The filter material according to claim 5, wherein the separator is made of a foaming type hot melt resin. 請求項１〜６に記載のフィルタ材を剛性枠に取り替え自在に装着したことを特徴とするフィルタ装置。A filter device, wherein the filter material according to any one of claims 1 to 6 is exchangeably mounted on a rigid frame. 長手方向にプリーツ折り加工された圧縮弾性を有する濾材を長手方向に圧縮させ、この状態で前記濾材の幅方向両端部に抗張力を有するテープを固着することを特徴とするフィルタ材の製造方法。A method of manufacturing a filter material, comprising compressing a filter material having compression elasticity, which has been pleated in the longitudinal direction, in a longitudinal direction, and fixing a tape having tensile strength to both ends in the width direction of the filter material in this state. 長手方向にプリーツ折り加工された圧縮弾性を有する濾材の長手方向に線状のセパレータを付着した後、前記濾材を長手方向に圧縮させることを特徴とする請求項８記載のフィルタ材の製造方法。9. The method for manufacturing a filter material according to claim 8, wherein the filter material is compressed in the longitudinal direction after a linear separator is attached in the longitudinal direction of the filter material having compression elasticity that has been pleated in the longitudinal direction.
JP2002250944A 2002-08-29 2002-08-29 FILTER MATERIAL, ITS MANUFACTURING METHOD, AND FILTER DEVICE WITH FILTER MATERIAL Expired - Fee Related JP4182332B2 (en)

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EP2722092B1 (en) * 2012-10-19 2019-08-28 American Air Filter Company, Inc. Air filter with tensile support member
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JP2021098161A (en) * 2019-12-20 2021-07-01 日本無機株式会社 Filter pack, and air filter
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