JP2012223701A - Molded filter - Google Patents

Molded filter Download PDF

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JP2012223701A
JP2012223701A JP2011093098A JP2011093098A JP2012223701A JP 2012223701 A JP2012223701 A JP 2012223701A JP 2011093098 A JP2011093098 A JP 2011093098A JP 2011093098 A JP2011093098 A JP 2011093098A JP 2012223701 A JP2012223701 A JP 2012223701A
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Prior art keywords
cloth
filter
filter cloth
sewn
shape
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JP2011093098A
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JP5748541B2 (en
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Yoshikazu Saito
嘉一 斉藤
Masahiro Furuoya
昌弘 古尾谷
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SAGAMI SHOKAI KK
TECHNO M KK
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SAGAMI SHOKAI KK
TECHNO M KK
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Priority to JP2011093098A priority Critical patent/JP5748541B2/en
Priority to CN201110320311.2A priority patent/CN102743934B/en
Priority to KR1020110118833A priority patent/KR101325077B1/en
Publication of JP2012223701A publication Critical patent/JP2012223701A/en
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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
    • B01D46/52—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
    • B01D46/523—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0618—Non-woven

Abstract

PROBLEM TO BE SOLVED: To provide a molded filter allowing retention of the pleat form of a filter cloth composed of a woven or nonwoven fabric without resin processing.SOLUTION: The filter cloth 10 is configured to include fiber aggregates, e.g., a needle punch nonwoven fabric. It is tubular in the form of pleats. Counter layers of the filter cloth 10 are sewed together from outside with machine sewing thread or the like while being patched by patches 12 in crests and troughs (folded-back parts) of the pleat form. The sewed parts 16-1 and 16-2, and the patches 12 in the sewed parts 16-1 and 16-2 extend practically throughout the length of the pleats, enabling the retention of the pleat form of the filter cloth 10.

Description

この発明は集塵装置用の成形フィルタに関するものである。   The present invention relates to a molded filter for a dust collector.

集塵装置において集塵効率を高めるため濾布をプリーツ形状等の所謂成形フィルタに構成することが行われる。プリーツ形状等の折り畳み構造とすることにより表面積が相対的に大きくなり、その分集塵効率が高められる。他方、濾布としてニードルパンチ不織布および織布、などの低剛性のろ材を使用した場合、素材が軟弱なためそのままではプリーツ形状を維持し得ない。従来のプリーツ形状の維持はろ材に熱硬化性樹脂を含浸させ、加熱下でプリーツ成形することによりプリーツ形状を固定化することが行わることが多かった。熱硬化性樹脂を含浸はろ過能力の点では不利である。他方、プリーツ形状の維持のためプリーツ形状における折返し部（山部及び谷部）において、そこで、折返し部に近接して濾布の対向部を濾布長手方向に沿って縫着するものが既に提案されれている（特許文献１，２）。
特開平５−２７７３１６号公報 特開２００９−０１１９８９号公報 In order to increase the dust collection efficiency in the dust collector, the filter cloth is configured as a so-called molded filter such as a pleated shape. By using a folded structure such as a pleat shape, the surface area becomes relatively large, and the dust collection efficiency is increased accordingly. On the other hand, when a low-rigid filter medium such as a needle punched nonwoven fabric or woven cloth is used as the filter cloth, the pleated shape cannot be maintained as it is because the material is soft. In order to maintain the conventional pleated shape, the filter medium is often impregnated with a thermosetting resin and pleated by heating to fix the pleated shape. Impregnation with a thermosetting resin is disadvantageous in terms of filtration capacity. On the other hand, in order to maintain the pleat shape, there is already proposed a fold-up portion (mountain portion and trough portion) in the pleat shape, in which the opposite portion of the filter cloth is sewn along the filter cloth longitudinal direction in the vicinity of the turn-up portion. (Patent Documents 1 and 2).
JP-A-5-277316 JP 2009-011989

従来技術の縫製を主体にプリーツ形状を維持する濾布にあっては集塵装置用の濾布（バグフィルタ）として使用した場合に耐久性に問題があった。即ち、集塵装置用においては内側に濾布の筒形状を維持するための配置されるリテーナにより筒形状を維持する。集塵装置用においては濾布のクリーニングのため定期的にパルスジェット、エアーブロー、または機械的払い落し（含むバイブロ方式）を繰り返し的に内側から噴射する。縫製を主体にプリーツ形状を確保する構造の場合、プリーツ部の剛性が樹脂加工品と比較し弱いため、パルスジェットの噴射により縫製リテーナは濾布の内側の折返し部（プリーツ形状における谷部）に繰り返し払い落しプロセスがなされることによりへたりが生じ易く、クリーニングを繰り返してゆくうちに、プリーツ形状が失われ、ろ過効率が低下したり濾布の損傷が早期に進行してしまう恐れがあった。また、濾布の外側における折り返し部（プリーツ形状における山部）においてはリテーナと直接接触しないため、外側程濾布の損傷はリテーナと衝突する内側ほどには早くは進まないが、パルスジェットによる糸目からの吹き漏れ及び繰り返し的な折り曲げによる変形や最悪の場合疲労による損傷の懸念があった。   The filter cloth that maintains the pleated shape mainly by sewing in the prior art has a problem in durability when used as a filter cloth (bag filter) for a dust collector. In other words, in the case of the dust collector, the cylindrical shape is maintained by the retainer arranged inside to maintain the cylindrical shape of the filter cloth. For dust collectors, pulse jet, air blow, or mechanical blow-out (including vibro method) is periodically sprayed from the inside to clean the filter cloth. In the case of a structure that secures the pleat shape mainly for sewing, the rigidity of the pleat part is weaker than that of the resin processed product, so the sewage retainer is turned into the folded part inside the filter cloth (valley part in the pleat shape) by spraying a pulse jet. Due to the repeated wiping process, sag is likely to occur, and as the cleaning process is repeated, the pleat shape may be lost, and the filtration efficiency may be reduced or the filter cloth may be damaged early. . In addition, since the folded portion on the outside of the filter cloth (the peak portion in the pleat shape) does not directly contact the retainer, the damage to the filter cloth does not progress as fast as the inside that collides with the retainer. There was concern about deformation due to repeated leakage and repeated bending and damage due to fatigue in the worst case.

この発明はかかる問題点に鑑みてなされたものであり、樹脂加工に主として依拠しない縫製によりプリーツ形状を維持する集塵装置用成形フィルタ（バグフィルタ）において、クリーニングのための繰り返し的なパルスジェット等の払い落し工程に関らず、長期にわたりプリーツ形状を維持しまた折返し部の早期損傷を防止し得るようにすることを目的とする。   The present invention has been made in view of such problems, and in a dust collector molding filter (bag filter) that maintains a pleat shape by sewing that does not mainly depend on resin processing, a repetitive pulse jet for cleaning, etc. It is an object of the present invention to maintain a pleated shape over a long period of time regardless of the wiping-off process and to prevent early damage of the folded portion.

この発明の集塵装置用成形フィルタにあっては、プリーツ形状の維持のため少なくとも一部の折返し部において濾布の対向部が縫着され、縫着がされている折返し部の少なくとも一部の折返し部においては縫着は当布を当てた状態にて行われる。当布はプリーツ形状部の長手方向の実質的に全長に延在しており共縫いにより一体化することが好ましい。また、当布は濾布の内側（リテーナの近接側）における折返し部の全体若しくは一部とすることができる。当布は濾布の外側（リテーナから離間側）における折返し部の全体若しくは一部にもあてることができる。場合によっては、当布は濾布の外側（リテーナから離間側）における折返し部のみに当てることも可能である。   In the dust collector molded filter according to the present invention, in order to maintain the pleat shape, at least a part of the folded part is sewn at the part of the folded part, and at least a part of the folded part is sewn. In the folded portion, sewing is performed with the cloth applied. This cloth extends substantially the entire length in the longitudinal direction of the pleat-shaped part, and is preferably integrated by co-sewing. Moreover, this cloth can be made into the whole or a part of the folding | turning part in the inner side (adjacent side of a retainer) of a filter cloth. The cloth can be applied to the whole or a part of the folded portion on the outside of the filter cloth (on the side away from the retainer). In some cases, the cloth can be applied only to the folded portion on the outside of the filter cloth (on the side away from the retainer).

プリーツ形状の折返し部における対向部の縫製は折返し部の当布を共縫いして行うことからプリーツ形状の折返し部が強化され、クリーニングのための繰り返し的なパルスジェットの噴射に対してプリーツ形状の維持（クリーニング効率向上）及び寿命の延長を実現することができる。また、濾布の内側の折返し部の全体若しくは一部に当布を当てることでパルスジェットの噴射による衝突衝撃に対してプリーツ形状を効果的に保護することができる。   The pleat-shaped folded portion is sewn at the opposite portion by jointly sewing the folded-up portion of the cloth so that the pleated-shaped folded portion is reinforced, and the pleated-shaped folded portion is reinforced against repetitive pulse jet injection for cleaning. Maintenance (improvement of cleaning efficiency) and extension of life can be realized. Moreover, the pleat shape can be effectively protected against a collision impact caused by injection of a pulse jet by applying the cloth to the entire or part of the folded portion inside the filter cloth.

図１はこの発明の一実施形態の成形フィルタの濾布構造を展開状態において模式的に示す縦断面図である。FIG. 1 is a longitudinal sectional view schematically showing a filter cloth structure of a molded filter according to an embodiment of the present invention in a developed state. 図２は図１の濾布の筒形状を模式的に示す図である。FIG. 2 is a diagram schematically showing the cylindrical shape of the filter cloth of FIG. 図３は筒形状に形成した濾布の側面図である。FIG. 3 is a side view of a filter cloth formed in a cylindrical shape. 図４は図３のIV−IV線に沿った横断面図である。FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 図５はミシンミシンがけによる濾布の端部処理を説明する模式的斜視図である。FIG. 5 is a schematic perspective view for explaining the edge processing of the filter cloth by the sewing machine sewing. 図６はスナップリングを縫い込んで形成される口元部を示す断面図である。FIG. 6 is a cross-sectional view showing a mouth portion formed by sewing a snap ring. 図７はこの発明の別実施形態の成形フィルタの濾布構造を展開状態において模式的に示す縦断面図である。FIG. 7 is a longitudinal sectional view schematically showing a filter cloth structure of a molded filter according to another embodiment of the present invention in a developed state. 図８は図７の成形フィルタの模式的横断面図である。FIG. 8 is a schematic cross-sectional view of the shaped filter of FIG. 図９はこの発明の更に別実施形態の成形フィルタの濾布構造を展開状態において模式的に示す縦断面図である。FIG. 9 is a longitudinal sectional view schematically showing a filter cloth structure of a molded filter according to still another embodiment of the present invention in a developed state. 図１０はこの発明の更に別実施形態の成形フィルタの濾布構造を展開状態において模式的に示す縦断面図である。FIG. 10 is a longitudinal sectional view schematically showing a filter cloth structure of a molded filter according to still another embodiment of the present invention in a developed state. 図１１は縫製による口元部及び底部を備えたフィルタの完成状態を口元部の部位を破断して示す側面図である。FIG. 11 is a side view showing a completed state of a filter having a mouth portion and a bottom portion by sewing, with a portion of the mouth portion broken.

図１において、１０はこの発明の成形フィルタにおける濾布を模式的に示しており、濾布１０はこの実施形態ではニードルパンチ不織布であり、ポリエステルやナイロンやアクリルなどの有機合成繊維（短繊維若しくは長繊維）の糸条の織布としての基布にポリエステルやナイロンやアクリルなどの有機合成繊維の短繊維（ステープル）をニードルパンチングにより植設することにより構成することができる。不織布の代わりに集塵性の良好な織布単独により構成とすることも可能である。また、濾布１０は有機合成繊維に限らずセラミック等の無機繊維を含むように構成することもできる。濾布１０はプリーツ加工機を通すことにより図１及び図２に示すようにプリーツ形状に形成される。そして、この実施形態においては、濾布は図２に示すように筒形状に形成される。プリーツ形状における折返し部（山10-1及び谷10-2）が中心線と平行方向に延びる）と共に、後述手段により一端（下端）において閉鎖され、上端にて開口された袋形状とされ、矢印ａのように外側（外周側）から導入し、矢印ｂのように内側（内周側）より排出する仕組みとしている。従って、図２の筒形状体の外周面に濾布１０における濾層が位置し、筒形状体の内周面が濾布１０における基布が位置する。即ち、処理流体は最初に濾布１０における外側の濾層と接触することにより処理流体中の塵埃は濾層により保持されることになる。   In FIG. 1, 10 schematically shows a filter cloth in the molded filter of the present invention, and the filter cloth 10 is a needle punched nonwoven fabric in this embodiment, and is an organic synthetic fiber (short fiber or polyester) such as polyester, nylon or acrylic. It can be configured by implanting short fibers (staples) of organic synthetic fibers such as polyester, nylon and acrylic on a base fabric as a woven fabric of yarns of long fibers) by needle punching. It is also possible to use a woven fabric having a good dust collecting property instead of the non-woven fabric. Moreover, the filter cloth 10 can also be comprised so that inorganic fibers, such as a ceramic, may be included not only in an organic synthetic fiber. The filter cloth 10 is formed into a pleated shape as shown in FIGS. 1 and 2 by passing through a pleating machine. In this embodiment, the filter cloth is formed in a cylindrical shape as shown in FIG. A pleat-shaped folded portion (the peaks 10-1 and valleys 10-2 extend in a direction parallel to the center line) is closed at one end (lower end) by means described later, and is formed into a bag shape opened at the upper end, and an arrow Introduced from the outside (outer peripheral side) as indicated by a, and discharged from the inner side (inner peripheral side) as indicated by arrow b. Therefore, the filter layer in the filter cloth 10 is positioned on the outer peripheral surface of the cylindrical body in FIG. 2, and the base cloth in the filter cloth 10 is positioned on the inner peripheral surface of the cylindrical body. In other words, the processing fluid first comes into contact with the outer filter layer of the filter cloth 10 so that the dust in the processing fluid is retained by the filter layer.

この発明によれば、濾布１０のプリーツ形状の保持は剛性の欠如した不織布などのため従来多く採用された樹脂加工に基本的には依拠せず（樹脂加工は排除しないが行うとしても必要最小限）、縫製構造によりプリーツ形状の保持を行っている。即ち、不織布は低剛性のためそれ単独ではプリーツ形状を保持できないため、従来はプリーツ加工に先立って不織布に熱硬化性樹脂を含浸させ、熱硬化性樹脂を含浸した状態で不織布をプリーツ加工機を通し、その際、濾布を樹脂の熱硬化温度にて加熱することで、プリーツ形状の固定化が行われていた。この発明では樹脂加工に基本的に依拠することなく（又は最小限の樹脂量で）プリーツ形状保持を行うため、縫製構造をとっている。縫製構造によりプリーツ形状の保持について説明すると、図１において、16-1, 16-2はプリーツ形状の保持のための縫製ラインを示しており、縫製ライン16-1, 16-2はプリーツ形状の山部10-1及び谷部10-2に近接して濾布１０の対向部を縫着（ミシン掛け）している。即ち、山部10-1若しくは谷部10-2に近接した部位、例えば、山部10-1若しくは谷部10-2の頂点若しくは底から３〜１０ミリメートル、好ましくは５〜６ミリメートルといった距離の部位において濾布１０の対向層が８〜６０番手のミシン糸（ポリエステル布の場合は１９〜２０番手のミシン糸）縫い合わされている。そして、縫製ライン16-1, 16-2は図２に示すように濾布のプリーツ形状部分の実質的全長に延びており、これによりプリーツ形状の保持を行うことができる。   According to the present invention, the pleated shape of the filter cloth 10 is basically not dependent on the resin processing that has been widely employed for non-rigid nonwoven fabrics, etc. Limited), the pleated shape is held by the sewing structure. That is, since the nonwoven fabric has low rigidity, it cannot retain the pleated shape by itself, so conventionally, the nonwoven fabric is impregnated with a thermosetting resin prior to pleating, and the nonwoven fabric is pleated with the thermosetting resin. At that time, the pleated shape was fixed by heating the filter cloth at the thermosetting temperature of the resin. In the present invention, since the pleat shape is maintained without relying on resin processing (or with a minimum amount of resin), a sewing structure is adopted. The holding of the pleated shape by the sewing structure will be described. In FIG. 1, 16-1 and 16-2 indicate sewing lines for holding the pleated shape, and the sewing lines 16-1 and 16-2 indicate the pleated shape. Opposite portions of the filter cloth 10 are sewn (sewn on) in the vicinity of the mountain portion 10-1 and the valley portion 10-2. That is, at a distance of 3 to 10 millimeters, preferably 5 to 6 millimeters from a portion close to the crest 10-1 or the trough 10-2, for example, the top or bottom of the crest 10-1 or the trough 10-2. The facing layer of the filter cloth 10 is sewn on the 8th to 60th sewing thread (19 to 20th sewing thread in the case of a polyester cloth). The sewing lines 16-1 and 16-2 extend substantially the entire length of the pleat-shaped portion of the filter cloth as shown in FIG. 2, whereby the pleated shape can be held.

図１に示す実施形態においては、濾布の筒形状における内側（後述のリテーナ配置側）の全ての折り返し部（谷10-2）の部分においては折り返し部に外側（外角側）より当布１２が当てられる。当布１２は筒状の濾布１０の実質的全長に沿って延びており、縫製によるプリーツ形状維持のための内側の縫製ライン16-2は当布１２も共縫いするように行われる。即ち、当布１２は図２には簡明のため図示されないが、この実施形態では谷部10-2に実質的全長において外側（外角側）より当てられ縫製ライン16-2により共縫いされている。当布１２は共布でもよいが同種繊維よりなる、より小秤量の布とすることができる。濾布１０の全横断面における当布１２の配置は図４に示され、この実施形態では当布１２は内側（リテーナ１４の側）に位置する。図１１は集塵機のセルに配置した状態における濾布１０を示しており、濾布１０の内側（筒状の内周側）に濾布１０の筒形状を維持するためのリテーナ１４が挿入配置される。リテーナ１４は籠状の周知のタイプでもパンチングプレートを筒状に形成したものでも良い。図１は当布１２を共縫いにより当てた内側のプリーツ形状折返し部１２とリテーナ１４との位置関係を拡大して模式的に示す。   In the embodiment shown in FIG. 1, all the folded portions (valley 10-2) on the inner side (retainer arrangement side described later) in the tubular shape of the filter cloth are arranged on the folded portion 12 from the outer side (outer corner side). Is applied. The cloth 12 extends along substantially the entire length of the tubular filter cloth 10, and the inner sewing line 16-2 for maintaining the pleated shape by sewing is performed so that the cloth 12 is also sewn together. That is, the cloth 12 is not shown in FIG. 2 for the sake of brevity, but in this embodiment, it is applied to the valley 10-2 from the outside (outer corner side) in a substantially full length, and is sewn together by a sewing line 16-2. . Although the cloth 12 may be a common cloth, it can be a smaller weighed cloth made of the same kind of fibers. The arrangement of the cloth 12 in the entire cross section of the filter cloth 10 is shown in FIG. 4. In this embodiment, the cloth 12 is located on the inner side (the side of the retainer 14). FIG. 11 shows the filter cloth 10 in a state of being arranged in a cell of the dust collector, and a retainer 14 for maintaining the tubular shape of the filter cloth 10 is inserted and arranged inside the filter cloth 10 (inner cylindrical side). The The retainer 14 may be a well-known type having a bowl shape or a punching plate formed in a cylindrical shape. FIG. 1 schematically shows an enlarged positional relationship between the inner pleated folded portion 12 and the retainer 14 to which the cloth 12 is applied by joint sewing.

図１の実施形態においては、プリーツ形状の外側（後述のリテーナから離間側）の折返し部（山部10-1）には当布を当てないが、想像線１２´にて示すようにプリーツ形状の外側の折返し部（山部10-1）にも当布１２´を当て外側のプリーツ形状のための縫製ライン16-1に沿って共縫いすることが可能であり、これにより、より堅牢なプリーツ形状を得ることができる。   In the embodiment of FIG. 1, the cloth is not applied to the folded portion (mountain portion 10-1) outside the pleat shape (the side away from the retainer described later), but as shown by the imaginary line 12 ′ It is possible to apply the cloth 12 'to the outer folded portion (mountain portion 10-1) of the fabric and sew together along the sewing line 16-1 for the outer pleat shape. A pleated shape can be obtained.

当布１２としては基本的に使用濾布１０と同素材とする。濾布１０がポリエステルであれば当布１２もポリエステル素材となる。濾布１０がポリエステル不織布の場合は当布12, 12'はポリエステル織布とすることができる。目付けとしては濾布１０より小さいものを採用することができる。濾布１０が織布の場合は当布１２は共布とすることができる。   The cloth 12 is basically the same material as the filter cloth 10 used. If the filter cloth 10 is polyester, the cloth 12 is also a polyester material. When the filter cloth 10 is a polyester nonwoven fabric, the cloth 12, 12 'can be a polyester woven cloth. A fabric weight smaller than that of the filter cloth 10 can be employed. When the filter cloth 10 is a woven cloth, the cloth 12 can be a common cloth.

次ぎに、以上のようにプリーツ形状を縫製により固定化した筒形状の濾布より袋状に形成し、集塵装置のセルプレートに取り付けるための構造について説明すると、図３及び図４は縫製によりプリーツ形状を固定した濾布を筒形状に形成した状態を示す。即ち、縫製によりプリーツ形状を固定した濾布は筒状に丸められ、縦方向の合せ目に沿って縫製することにより筒形状に構成される。また、筒形状の上下両端については図５に示すように、筒状濾布１０の上下端部10-1においてプリーツが潰される。ミシンがけにより平坦化された後の濾布の縮径した端部10-1は図３にも示されている。そして、筒状の別の非濾布が縫い込まれ口元を形成した濾布１０の下端には当布１８が当てられ縫製されることにより袋状とされ、上端は集塵装置に適合するようにスナップリングやロープの縫込みが適宜行われて口元とされる。図３において１８は円形の当布であり、当布１８はフィルタの底部となる濾布１０の平坦化された下端部10-1に当接せしめられ、当布１８の外周部は筒状の濾布１０の上面に対して折り返され、当布１８のこの折り返し部分１８Ａ（図１１）は濾布１０に対してミシン掛けされ、図１１でＬ２はミシン掛けによる縫製部分を示し、これにより縫製構造の成形フィルタの閉じた底部が得られる。他方、成形フィルタの口元となる縫製部分は図６により模式的に示されており、２２は金属性スナップリングであり、弾性鋼材帯片にて形成される。スナップリング２２は口元布２４により包囲され、口元布２４が両端で縫製されることによりスナップリング２２は口元布２４に縫いこまれる（縫着ラインをＬ３にて示す）。このようにして、スナップリング２２を縫着した口元布２４は濾布１０の口元となる端部（図１１の上端）に装着され縫着される（縫込み線をＬ４にて示す）。   Next, a structure for forming a bag shape from the tubular filter cloth fixed by sewing as described above and attaching it to the cell plate of the dust collector will be described. FIG. 3 and FIG. The state which formed the filter cloth which fixed the pleat shape in the cylinder shape is shown. That is, the filter cloth having a pleated shape fixed by sewing is rolled into a cylindrical shape, and is formed into a cylindrical shape by sewing along a seam in the vertical direction. In addition, as shown in FIG. 5, the pleats are crushed at the upper and lower end portions 10-1 of the cylindrical filter cloth 10 at the upper and lower ends of the cylindrical shape. The reduced diameter end 10-1 of the filter cloth after it has been flattened by sewing is also shown in FIG. Then, another tubular non-filter cloth is sewn into a bag shape by applying the cloth 18 to the lower end of the filter cloth 10 which is sewn to form a mouth, and the upper end is adapted to the dust collector. The snap ring and rope are sewn appropriately to make the mouth. In FIG. 3, 18 is a circular cloth, and the cloth 18 is brought into contact with the flattened lower end 10-1 of the filter cloth 10 serving as the bottom of the filter, and the outer periphery of the cloth 18 is cylindrical. Folded with respect to the upper surface of the filter cloth 10, the folded portion 18A (FIG. 11) of the cloth 18 is machined over the filter cloth 10, and L2 in FIG. A closed bottom of the shaped filter of structure is obtained. On the other hand, a sewing portion that becomes the mouth of the formed filter is schematically shown in FIG. 6, and 22 is a metallic snap ring, which is formed of an elastic steel strip. The snap ring 22 is surrounded by the mouth cloth 24, and when the mouth cloth 24 is sewn at both ends, the snap ring 22 is sewn into the mouth cloth 24 (sewing line is indicated by L3). In this way, the mouth cloth 24 to which the snap ring 22 is sewn is mounted and sewn on the end portion (upper end in FIG. 11) of the filter cloth 10 (the sewing line is indicated by L4).

濾布１０は所定の長さを得るため筒状のものを複数縦方向に配置し、近接端同士を縫製により繋いで縦長に構成することもできる。   In order to obtain a predetermined length, the filter cloth 10 can be configured to be vertically long by arranging a plurality of cylindrical ones in the vertical direction and connecting adjacent ends by sewing.

図７は別実施形態を示し、当布１２が谷部10-2（筒形状における内周側の折返し部）のみに当てられ山部10-1（外周側の折返し部）に当てられていないのは図１と同様であるが、谷部10-2の前部ではなく適当に間引きされている（図８も参照）。間引きの程度は使用条件による。即ち、集塵機においては濾布の交換は定期に行われることが多いから、使用期間内においてプリーツ形状を維持しうる最小限の当布１２とすることによりコストと濾過性能とのバランスをとることができる。   FIG. 7 shows another embodiment, in which the cloth 12 is applied only to the valley 10-2 (the inner circumferential folded portion in the cylindrical shape) and not to the mountain 10-1 (the outer circumferential folded portion). 1 is the same as in FIG. 1, but is appropriately thinned out instead of the front of the valley 10-2 (see also FIG. 8). The degree of thinning depends on the usage conditions. That is, in the dust collector, the filter cloth is often replaced periodically, so that the balance between cost and filtration performance can be achieved by using the minimum cloth 12 that can maintain the pleated shape within the period of use. it can.

図９は更に別の実施形態を示しており、この実施形態では当布１２は谷部10-2（内周の折返し部）のみ（全部若しくは一部）に当てられ縫製ライン16-2によりプリーツ形状を強化していることは同様であるが山部10-1（外周の折返し部）では対向部の縫製が行われていない。使用状況によっては、この構造でも当布１２による補強効果により使用期間内において所期のプリーツ形状が維持し得る。   FIG. 9 shows still another embodiment. In this embodiment, the cloth 12 is applied only (all or a part) to the valley 10-2 (the inner folded portion) and pleated by the sewing line 16-2. It is the same that the shape is strengthened, but the opposing portion is not sewn in the mountain portion 10-1 (the outer circumferential folded portion). Depending on the use situation, even in this structure, the desired pleated shape can be maintained within the use period due to the reinforcing effect of the cloth 12.

図１０は更に別の実施形態を示しており、この実施形態はクリーニングにおけるパルシング時に内周（リテーナ１４の側）の折返し部（谷部10-2）に強い負荷がかからない場合で、外周（リテーナ１４から離間側）の折返し部（山部10-1）のみに当布１２´が部分的（又は全体）に当てられ、縫製ライン16-1にて共縫いされている。内側の折返し部（谷部10-2）は縫製もされていないが、プリーツ強度上必要に応じて図１の縫製ライン16-2と同様な縫製ラインにて対向部の縫製を行うことができる。   FIG. 10 shows still another embodiment, which is a case where a strong load is not applied to the folded portion (valley portion 10-2) on the inner periphery (retainer 14 side) during pulsing during cleaning, and the outer periphery (retainer). The cloth 12 ′ is partially (or entirely) applied only to the folded portion (mountain portion 10-1) on the side away from 14, and is sewn together on the sewing line 16-1. Although the inner folded portion (valley 10-2) is not sewn, the opposing portion can be sewn on a sewing line similar to the sewing line 16-2 in FIG. 1 as necessary in terms of pleat strength. .

このようにして構成されたフィルタの集塵装置などへの装着は周知のものと同様である。即ち、図１１において、２６は集塵装置のセルプレートであり、セルプレート２６に多数形成された開口部２８にフィルタが挿入され、スナップリング２２が開口部２８に表面の溝部を利用して嵌着される。そして、フィルタの内側より動作中のフィルタの形状保持のためのリテーナ１４が想像線にて示すように挿入される。   The filter thus constructed is attached to a dust collector or the like in the same manner as a known one. That is, in FIG. 11, reference numeral 26 denotes a cell plate of a dust collector. A filter is inserted into a large number of openings 28 formed in the cell plate 26, and the snap ring 22 is fitted into the opening 28 using a groove on the surface. Worn. Then, a retainer 14 for maintaining the shape of the active filter is inserted from the inside of the filter as indicated by an imaginary line.

図１の実施形態の濾布１０を使用したとして、リテーナ側（内側）において濾布１０のプリーツ形状の折返し部（谷の部分10-2）（必要あれば外側における濾布のプリーツ形状の折返し部（山の部分10-1）にも）に当布１２（山の部分10-1には当布１２´）が当てられ、プリーツ形状のための縫製ライン16-2（山の部分10-1にも当布１２´を当てる場合は縫製ライン16-1）によって共縫いされているため、濾布クリーニング時の繰り返しパルスによる衝突衝撃に対して補強することができる。また、繰り返しパルスの噴射時、濾布の下端をスプリングを掛装し、濾布の緊張を高める場合があるが、本発明においては当布12, 12'の設置により緊張方向での強度が高められており、このような繰り返しパルス印加方式に適している。   Assuming that the filter cloth 10 of the embodiment of FIG. 1 is used, the pleated folded portion (valley portion 10-2) of the filter cloth 10 on the retainer side (inner side) (if necessary, the folded fold shape of the filter cloth on the outer side) The cloth 12 (also on the mountain 10-1) is applied with the cloth 12 (the cloth 12 'on the mountain 10-1), and the sewing line 16-2 for the pleat shape (the mountain 10- When the cloth 12 'is also applied to 1, it is sewed together by the sewing line 16-1), so that it is possible to reinforce against a collision impact caused by repeated pulses at the time of cleaning the filter cloth. In addition, during repeated pulse injection, the lower end of the filter cloth may be hung with a spring to increase the tension of the filter cloth. In the present invention, the strength in the tension direction is increased by installing the cloth 12, 12 ′. It is suitable for such a repetitive pulse application method.

１０…濾布
10-1, 10-2…折返部
12, 12'…当布
１４…リテーナ
16-1, 16-2…縫製ライン
２２…スナップリング
２４…口元布 10 ... filter cloth
10-1, 10-2 ... turn-up section
12, 12 '... This cloth 14 ... Retainer
16-1, 16-2 ... Sewing line 22 ... Snap ring 24 ... Mouth cloth

Claims (4)

集塵装置のセルプレートに内側にリテーナを配置してその外側に配置される筒形状の濾布を具備し、濾布はプリーツ形状をなす成形フィルタであって、プリーツ形状の保持のためプリーツ形状の折返し部の少なくとも一部において濾布の対向部が縫着され、対向部が縫着された折返し部の少なくとも一部において折返し部に当布を当てた状態でプリーツ形状の保持のための濾布の対向部の縫着が行われていることを特徴とする成形フィルタ。   A retainer is arranged on the inside of the cell plate of the dust collector, and a cylindrical filter cloth is arranged on the outside. The filter cloth is a pleated shaped filter, and the pleated shape is used to maintain the pleated shape. A filter cloth for holding a pleated shape in a state where the facing portion of the filter cloth is sewn on at least a part of the folded portion and the cloth is applied to at least a part of the folded portion where the facing portion is sewn. A molded filter characterized in that the opposite portions of the cloth are sewn. 請求項１に記載の発明において、前記縫着部は濾布のプリーツ部に沿って長手方向の実質的に全長にわたり延設され、かつ折返し部に当てられる前記当布も長手方向の実質的全長に沿って延設される成形フィルタ。   The invention according to claim 1, wherein the sewn portion extends substantially along the entire length in the longitudinal direction along the pleat portion of the filter cloth, and the cloth that is applied to the turned-up portion also has a substantial length in the longitudinal direction. A molded filter that extends along the line. 請求項２に記載の発明において、リテーナに近接側の各折返し部は当布が当てられ、プリーツ形状の保持のための濾布の対向部の縫着が行われている成形フィルタ。   3. The molded filter according to claim 2, wherein each of the folded portions on the side close to the retainer is applied with a cloth, and a counter part of the filter cloth for holding the pleated shape is sewn. 請求項２に記載の発明において、リテーナに近接側の折返し部は円周方向に適宜に間隔をおいて当布が当てられ、プリーツ形状の保持のための濾布の対向部の縫着が行われている成形フィルタ。   In the invention according to claim 2, the folding portion on the side close to the retainer is applied with a cloth at an appropriate interval in the circumferential direction, and the opposite portion of the filter cloth for holding the pleated shape is sewn. Molded filter.
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