JP3859957B2

JP3859957B2 - Edge winding engagement structure and manufacturing method thereof

Info

Publication number: JP3859957B2
Application number: JP2000335410A
Authority: JP
Inventors: 圭一中川; 榮一竹内; 元進谷; 大典酒井
Original assignee: Toyo Aluminium Ekco Products Co Ltd
Current assignee: Toyo Aluminium Ekco Products Co Ltd
Priority date: 2000-11-02
Filing date: 2000-11-02
Publication date: 2006-12-20
Anticipated expiration: 2020-11-02
Also published as: JP2002143953A

Description

【０００１】
【発明の属する技術分野】
この発明は縁巻係合構造に関し、特にレンジフード用フィルタカバー等のアルミニウム箔をプレス成形して形成される金属箔成形体の縁巻係合構造及びその製造方法に関するものである。
【０００２】
【従来の技術】
図８は従来のレンジフード用フィルタカバー概略構造を示す斜視図である。
【０００３】
図を参照して、レンジフード用フィルタカバー７０は第１の分割体７１と第２の分割体７２とから構成され、各々アルミニウム箔のシートを成形加工することによって形成されている。その各々の中央には不織布等からなるフィルタ７３及びフィルタ７４が取付けられている。又、第１の分割体７１の外周には縁巻７５ａ〜縁巻７５ｃが形成され、第２の分割体７２の外周には縁巻７６ａ〜縁巻７６ｃが形成されている。
【０００４】
第１の分割体７１の縁巻７５ｂには取付具７７が、第２の分割体７２の縁巻７６ｂには取付具７８が各々取付けられている。
【０００５】
図９は図８の“Ｙ”部分の拡大斜視図である。
【０００６】
図を参照して、取付具７８は断面がコの字状のヨーク８０と、ヨーク８０の内部に取付けられた磁石８１と、ヨーク８０に一体的に接続された折曲げ部８２とから構成される。尚、折曲げ部８２は、取付具７８を第２の分割体７２に取付ける前には曲げられておらず、又折曲げ位置に対応した部分に開口８４が形成されている。
【０００７】
取付具７８を第２の分割体７２に取付ける際には、折曲げ部８２を第２の分割体７２の縁巻７６ｂの近傍に形成される開口８３に通し、開口８４の部分でヨーク８０の背面の方向に折り曲げる。このようにして取付具７８は第２の分割体７２の縁巻７６ｂの周りに回動自在に取付けられる。
【０００８】
一方、取付具７７も同様の構造を有しており、同様にレンジフード用フィルタカバー７０の縁巻７５ｂに回動自在に取付けられている。
【０００９】
図１０は図８のレンジフード用フィルタカバー７０を被取付体に取付けた状態を示した側面図である。
【００１０】
図を参照して、レンジフード用フィルタカバー７０は、取付具７７の吸着力によってレンジフード等の被取付体３１に取付けられている。
【００１１】
図１１は図８の“Ｚ”部分の拡大斜視図である。
【００１２】
図を参照して、第１の分割体７１の縁巻７５ａに第２の分割体７２の縁巻７６ａが摺動自在に挿入されている。このようにしてレンジフード用フィルタカバー７０においては、第１の分割体７１の縁巻７５ａ及び縁巻７５ｃと第２の分割体７２の縁巻７６ａ及び縁巻７６ｃの各々とが摺動自在に係合し、図８の状態からレンジフード用フィルタカバー７０の全体長さを、取付ける対象のレンジフード等の被取付体３１の幅に合わせるように伸縮させて任意の長さに調整することができる。
【００１３】
【発明が解決しようとする課題】
上記のような従来の金属箔成形体たるレンジフード用フィルタカバーのような２つの分割体よりなる縁巻係合構造では、図１１に示すように縁巻７５ａ及び縁巻７６ａはいずれも一定径の直管状に形成されている。したがって、レンジフード用フィルタカバー７０の全体長さを長くしようとして縁巻７６ａを縁巻７５ａから引き抜く方向に力を加えると、縁巻７６ａが脱落してしまい、これらの係合状態が外れてしまう虞れがある。
【００１４】
又、逆にレンジフード用フィルタカバー７０の全体長さを小さくしようとして、縁巻７６ａを縁巻７５ａに対して押し込む方向に力を加えると必要以上にこれらの係合状態が深くなってしまう場合もあり、いずれも使い勝手の良い縁巻係合構造とはいえなかった。
【００１５】
この発明は上記のような課題を解決するためになされたもので、係合状態を調整する際のストッパー機能を有する縁巻係合構造及びその製造方法を提供することを目的とする。
【００１６】
【課題を解決するための手段】
上記の目的を達成するために、請求項１記載の発明は、金属箔成形体よりなる第１の分割体の側縁に形成された第１の縁巻に、金属箔成形体よりなる第２の分割体の側縁に形成された第２の縁巻を摺動自在に挿入する縁巻係合構造であって、第１の縁巻は大径の第１ストレート部と、第１ストレート部にその一端が接続され、その径が徐々に減少する第１テーパ部と、第１テーパ部の他端に接続された小径の第２ストレート部とからなり、第２の縁巻は、第１テーパ部の内部に収納され、その全体形状が第１テーパ部に類似の第２テーパ部と、第２テーパ部の一端に接続され、第２ストレート部の内部にその一部が収納され、かつ摺動自在な径の第３ストレート部とからなり、第２ストレート部の端部には、内方に折り曲げられた内層縁巻が形成され、第２テーパ部の端部には、外方に折り曲げられた外層縁巻が形成され、内層縁巻は、第３ストレート部の外面に摺動自在に当接し、外層縁巻は、第１テーパ部の内面に当接するものである。
【００１７】
このように構成すると、第１の縁巻から第２の縁巻を引き抜こうとすると、第２の縁巻の第２のテーパ部が第１の縁巻の第１テーパ部に当接する。又、第３ストレート部は第２ストレート部の内面に直接接して摺動することはない。
【００２０】
請求項２記載の発明は、金属箔成形体よりなる第１の分割体の側縁に形成された第１の縁巻に、金属箔成形体よりなる第２の分割体の側縁に形成された第２の縁巻を摺動自在に挿入する縁巻係合構造であって、第１の縁巻は、小径の第１ストレート部と、第１ストレート部にその一端が接続され、その径が徐々に増加する第１テーパ部と、第１テーパ部の他端に接続された大径の第２ストレート部とからなり、第２の縁巻は、第１テーパ部の内部に収納され、その全体形状が第１テーパ部に類似の第２テーパ部と、第２テーパの一端に接続され、第２ストレート部の内部にその一部が収納され、かつ摺動自在な径の第３ストレート部とからなり、第２ストレート部の端部には、内方に折り曲げられた内層縁巻が形成され、第２テーパ部の端部には、外方に折り曲げられた外層縁巻が形成され、内層縁巻は、第３ストレート部の外面に摺動自在に当接し、外層縁巻は、第１テーパ部の内面に当接するものである。
【００２１】
このように構成すると、第２の縁巻を第１の縁巻に対して押し込もうとすると、第２の縁巻の第２テーパ部が第１の縁巻の第１テーパ部に当接する。又、第３ストレート部は第２ストレート部の内面に直接接して摺動することはない。
【００２４】
請求項３記載の発明は、第１の分割体の側縁に形成された第１の縁巻に、第２の分割体の側縁に形成された第２の縁巻を摺動自在に挿入する縁巻係合構造の製造方法であって、第２の分割体を形成するための金属箔よりなる第１の平板の一部と、第１の分割体を形成するための金属箔よりなる第２の平板の一部とを重ね合わせて各々の端縁を揃える第１工程と、重ね合わされた状態で、端縁から所定範囲を巻込むようにして、一定径の第１ストレート部と第１ストレート部の径とは異なる一定径の第２ストレート部と、第１ストレート部と第２ストレート部とにその両端が接続され、径が徐々に変化するテーパ部とからなる縁巻を、第１ストレート部は第２の平板のみに対して、テーパ部及び第２ストレート部の一部は第１の平板と第２の平板の重なり部に対して、第２ストレート部の他の一部は、第１の平板のみに対して形成する第２工程とを備えたものである。
【００２５】
このように構成すると、第１の平板及び第２の平板ともにテーパ部を有した縁巻が係合状態で一体的に形成される。
【００２６】
請求項４記載の発明は、請求項３記載の発明の構成において、第１工程は、第１の平板の長手方向の端部を折返して折返し片を形成する工程と、第２の平板の長手方向の端部を折返して折返し片を形成する工程とを更に備え、折返し片の各々が形成された状態で、これらの折返し片が向かい合うように第１の平板及び第２の平板を重ね合わすものである。
【００２７】
このように構成すると、第１の分割体及び第２の分割体ともに各々折返し片の一部を巻込んだ縁巻が形成される。
【００２８】
【発明の効果】
以上説明したように、請求項１記載の発明は、第１の縁巻から第２の縁巻を引き抜こうとすると第２のテーパ部が第１テーパ部に当接するので、それ以上の第２の縁巻の移動が阻止され、第２の縁巻の第１の縁巻からの脱落が防止される。又、第３ストレート部の移動による抵抗が軽減され、スムーズな移動が可能となる。
【００３０】
請求項２記載の発明は、第２の縁巻を第１の縁巻に対して押し込もうとすると第２テーパ部が第１テーパ部に当接するので、それ以上の第２の縁巻の移動が防止されるため係合状態が安定する。又、第３ストレート部の移動による抵抗が軽減され、スムーズな移動が可能となる。
【００３２】
請求項３記載の発明は、ストッパー機能を有した縁巻係合構造が一度の成形によって形成されるため、効率的かつ安定した状態での製造方法となる。
【００３３】
請求項４記載の発明は、請求項３記載の発明の効果に加えて、縁巻の開放端部が丸みを帯びた状態となり、より安全性が高まるものである。
【００３４】
【発明の実施の形態】
図１はこの発明の第１の実施の形態によるレンジフード用フィルタカバーの外観形状を示した斜視図である。
【００３５】
図を参照して、レンジフード用フィルタカバー１５は第１の分割体１６と第２の分割体１７とから構成される。第１の分割体１６は例えばアルミニウム箔シートを成形加工することによって形成されており、その中央部の開口部分には不織布等からなるフィルタ２０が接着されている。又、第１の分割体７１の両側縁と分割体第２の分割体１７に係合する側と反対側の側縁とには、縁巻２３ａ〜縁巻２３ｃが形成されている。更に、第１の分割体１６の縁巻２３ｂの部分には、レンジフードの壁面等の被取付体に取付けるための磁石が埋め込まれた取付具２６が回動自在に取付けられている。
【００３６】
一方、第２の分割体１７も同様にアルミニウム箔シートの成形加工により形成されており、その中央部の開口には同様にフィルタ２１が取付けられている。又、第１の分割体１６と同様に第２の分割体１７の側縁には縁巻２４ａ〜縁巻２４ｃが形成されている。更に、縁巻２４ｂには取付具７８が回動自在に取付けられている。
【００３７】
図２は図１のＩＩ−ＩＩラインから見た図であって、レンジフード等の被取付体に取付ける前の状態と取付けた後の状態とを示した図である。
【００３８】
図２の（１）はレンジフード用フィルタカバー１５の取付前の状態を示しており、第１の分割体１６の縁巻２３ｂの中心線は、取付具２６が取付けられた部分が上方に湾曲するいわゆる円弧状に形成されている。すなわち、縁巻２３ｂの下端とほぼ同一面となる取付前の取付具２６の取付面の位置が、縁巻２３ｂの両端部の各々を結ぶ直線２９に対して被取付体３１に向かって反対方向に距離Ｓ分だけ離れている。又、取付具２６の取付面は、縁巻２３ｂの下側の稜線にほぼ整列した位置となっている。尚、この実施の形態においては、取付具２６は縁巻２３ｂのほぼ中央に位置しており、その位置と縁巻２３ｂの端部との距離Ｌと距離Ｓの比は、１６０：２となっている。同様に図１で示した第２の分割体１７の縁巻２４ｂの中心線も同様の円弧状に形成されている。
【００３９】
図２の（２）は、図２の（１）の状態のレンジフード用フィルタカバー１５を被取付体３１に取付けた状態を示した図である。
【００４０】
図を参照して、取付具２６が被取付体３１に固着されると、縁巻２３ｂの湾曲状態が図のような直線状態に変形する。そのため、縁巻２３ｂの両端部には矢印で示すような力が被取付体３１に対して加わることになる。これによって図１０で示した従来例のように縁巻２３ｂの両端部と被取付体３１との間に隙間が生じる虞れがなく、完全に密着した状態で取付けられることになる。そのため、取付状態が安定するとともに、縁巻２３ｂの直線状への変形によって被取付体３１との隙間がより少なくなり、その部分から進入する空気の量を低減することが可能となる。
【００４１】
尚、上記の実施の形態においては、矩形形状の対向辺を構成する縁巻２３ｂ及び縁巻２４ｂの各々の中心軸を円弧状に形成したが、他の対向辺を構成する縁巻２３ａ及び縁巻２４ａと縁巻２３ｃ及び縁巻２４ｃとをいずれも同様にそれらの中心線が円弧状になるように形成してもよい。
【００４２】
図３は図１の“Ｘ”部分の拡大斜視図であり、図４は図３のＩＶ−ＩＶラインの端面図である。
【００４３】
これらの図を参照して、縁巻２３ａは大径の第１ストレート部３３と、第１ストレート部３３の径より小さい小径の第２ストレート部３５と、第１ストレート部３３と第２ストレート部３５との間に接続され、それらに連続的に接続されるようにその径が徐々に変化する（第１）テーパ部３４とから構成されている。
【００４４】
一方、縁巻２４ａは、縁巻２３ａのテーパ部３４の内部に収納され、かつその全体形状がテーパ部３４に類似の（第２）テーパ部３８と、縁巻２３ａの第２ストレート部３５の内部にその一部が収納され、かつ摺動自在な（第３）ストレート部３７とから構成されている。尚、図４に示されているように、縁巻２３ａの第２ストレート部３５の先端部は内方に折り曲げられ内層縁巻４０が形成されている。そのため、ストレート部３７は第２ストレート部３５の内面に直接接して摺動することはないので、ストレート部３７の移動による抵抗が軽減され、スムーズな移動が可能になる。一方、縁巻２４ａのテーパ部３８の先端は外方に折り曲げられて外層縁巻４１が形成されており、テーパ部３４の内面に当接する。
【００４５】
縁巻２３ａ及び縁巻２４ａはこのように構成されているため、図４の二点鎖線で示している方向には縁巻２４ａは移動自在であるが、矢印方向への移動は実線で示した位置において縁巻２３ａのテーパ部３４と縁巻２４ａのテーパ部３８とが接触して、それ以上の移動が停止する。すなわち、テーパ部３４とテーパ部３８とによってストッパー機能を発揮することになる。
【００４６】
この係合状態は、図１で示された第１の分割体１６と第２の分割体１７とが引き伸ばされた状態においてさらなる伸びが防止され、一方これらの係合を深くする、いわゆるレンジフード用フィルタカバー１５を縮める方向に対してはスムーズなスライド動作を可能とすることを意味する。これによって、不用意なレンジフード用フィルタカバー１５の引き伸ばしがされても、第１の分割体１６と第２の分割体１７との係合が外れてしまうことを確実に防止することができる。
【００４７】
図５は図３及び図４で示した縁巻の係合構造をプレス成形するための工程を示した図である。
【００４８】
まず図５の（１）に示すように、第１の分割体１６に対応する矩形平板状の第２の平板４４と第２の分割体１７に対応する矩形平板状の第１の平板４３とを準備する。そして、第２の平板４４の端部４６を第１の平板４３側に内方に折り曲げて折返し片４８とし、同様に第１の平板４３の端部４５の部分を第２の平板４４側に折返して折返し片４７とする。
【００４９】
この状態で図５の（２）に示すように第２の平板４４の一部と第１の平板４３の一部とを重ね合わせて、二点鎖線で示す部分より上方の部分を矢印で示す方向に一体的に折り曲げて縁巻きを形成する。
【００５０】
このとき図５の（３）に示されているように領域Ａの部分の縁巻径を大きくし、領域Ｃの縁巻径の大きさを領域Ａの部分のものに比べて小さくする。そして領域Ｂの部分においては領域Ａと領域Ｃの縁巻径に連続するようにその縁巻径を徐々に変化するように設定する。すなわち、領域Ａの縁巻は第２の平板４４のみに対して、領域Ｂの縁巻及び領域Ｃの縁巻の一部は第１の平板４３と第２の平板４４の重なり部に対して、領域Ｃの縁巻の他の一部は第１の平板４３のみに対して形成するものである。尚、このような縁巻径の設定はプレス成形する際の金型の寸法設定によって行なう。
【００５１】
このようにして第２の平板４４と第１の平板４３とが重ね合わされた状態で一体的に縁巻が形成されると、図３及び図４で示した縁巻２３ａ及び縁巻２４ａの形状の縁巻が係合した状態で形成されることになる。すなわち、レンジフード用フィルタカバー１５は成形後に図１で示されたような伸ばされた状態となるように、第１の分割体１６及び第２の分割体１７が同時に一体的にプレス成形されることになる。
【００５２】
図６はこの発明の第２の実施の形態によるレンジフード用フィルタカバーの第１の分割体と第２の分割体との縁巻係合構造を示した端面図である。
【００５３】
図を参照して、第１の分割体の縁巻２３ａは小径の第１ストレート部５０と、第１ストレート部５０の径より大きな径を有する大径の第２ストレート部５２と、第１ストレート部５０と第２ストレート部５２との間に接続され、それらに連続的に接続されるようにその径が徐々に変化するテーパ部５１とから構成される。
【００５４】
一方、第２の分割体の縁巻２４ａは、第２ストレート部５２の内部に収納されかつ摺動自在な径を有するストレート部５３と、縁巻２３ａのテーパ部５１の内部に収納され、かつ全体形状がテーパ部５１と類似のテーパ部５４とから構成される。尚、縁巻２３ａの第２ストレート部５２の先端は内方に折り曲げられ内層縁巻５５が形成されている。そのため、ストレート部５３は第２ストレート部５２の内面に直接接して摺動することはないので、ストレート部５３の移動による抵抗が軽減され、スムーズな移動が可能になる。一方、縁巻２４ａのテーパ部５４の先端は外方に折り曲げられて外層縁巻５６が形成されており、テーパ部５１の内面に当接する。
【００５５】
縁巻２３ａ及び縁巻２４ａは、先の第１の実施の形態による図５で示したように一体的なプレス成形によって同時に形成されるものである。このような縁巻係合構造を採用すると、縁巻２４ａは二点鎖線で示されている方向には移動自在であるが、矢印で示す方向に移動すると、縁巻２４ａのテーパ部５４と縁巻２３ａのテーパ部５１とが、互いに当接してそれ以上の移動が阻止されるストッパー機能を発揮する。
【００５６】
したがってこのような縁巻係合構造によって、図１でいえばレンジフード用フィルタカバー１５を構成する第１の分割体１６と第２の分割体１７との係合状態をより深くしてレンジフード用フィルタカバー１５の全体長さを小さくする場合に、これらの係合の最終的な停止位置を設定することができる。
【００５７】
尚、図６の構造であれば、二点鎖線で示す方向に縁巻２４ａを移動させた場合、最終的には縁巻２４ａの外層縁巻５６と縁巻２３ａの内層縁巻５５とが当接することになり、縁巻２４ａが縁巻２３ａから分離して脱落するような虞れもない。すなわち図６の縁巻係合構造であれば、矢印の方向のみならずその反対方向の移動に対してもどちらもストッパー機能を有する構造といえる。したがって用途に応じてこの縁巻係合構造を採用すれば、縁巻を介してスライドさせる構造体に対してはより有益な機能を提供することが可能となる。
【００５８】
図７はこの発明の第３の実施の形態による換気扇カバーの取付状態を示した斜視図である。
【００５９】
図を参照して、換気扇カバー５８は、その中央部に形成されその開口にフィルタ６３が取付けられた膨出部６４と、膨出部６４の外周から外方に向かって平面状に伸びるフランジ部５９と、フランジ部５９の外周端全周に形成された縁巻６２ａ〜縁巻６２ｄによって構成されている。フランジ部５９の両側部分には、取付けるべき換気扇枠５７に固定された取付金具６１に係合する取付部６０が形成されている。これによって換気扇カバー５８はフランジ部５９が換気扇枠５７の取付け面に押付けられた状態で取付けられることになる。
【００６０】
図に示す二点鎖線は換気扇カバー５８の取付前の状態であって、取付部６０が形成されている側の縁巻６２ａ及び縁巻６２ｂの位置を示したものである。このように縁巻６２ａ及び縁巻６２ｂともに、その中央部がその両端部を結ぶ直線から換気扇枠５７とは反対方向に湾曲するような円弧状に形成されている。したがって取付時には、取付部６０に係合した取付金具６１によって縁巻６２ａ及び縁巻６２ｂは直線状に変形する。そのため縁巻６２ｃ及び縁巻６２ｄもより強く換気扇枠５７の取付面に抑えられることになり、換気扇カバー５８の取付状態が安定する。
【００６１】
尚、上記の実施の形態のいずれにおいても被取付体の表面形状は平面としているが、曲面形状等の被取付体にも適用できる。この場合、取付具が取付けられる辺の両端部の各々と被取付体との距離の和の二分の一の長さより、取付け具の取付面と被取付体との距離を大きくするように金属箔成形体の形状を設定すれば良い。このようにすると、取付具が取付けられた辺が被取付体の表面形状に沿うように変形するので、取付具の両端部が被取付体に押付けられて取付状態が安定する。
【００６２】
又、上記の各実施の形態では、取付具２６,２７は取付辺のほぼ中央に取付けているが、取付辺の両端部を除いた位置に取付ければ同様に取付状態が安定する。
【００６３】
更に、上記の実施の形態では磁石を用いた取付具や、取付金具と係合する取付部を金属箔成形体の固定手段としているが、これら以外の例えば粘着テープ、両面ファスナ、クリップ等の固定手段も同様に使用することができる。
【００６４】
更に、上記の各実施の形態では、取付具は対向する辺に一対に取付けられているが、いずれか一方の辺にのみ取付具を取付けるようにしても同様の効果を奏する。
【００６５】
更に、上記の実施の形態では、金属箔成形体の外周の辺には縁巻が形成されているが、取付状態の安定化という観点からは縁巻が形成されていない辺に直接取付具を取付けても良い。
【００６６】
更に、上記の実施の形態として示したレンジフード用フィルタカバー以外の金属箔成形体であっても、２以上の分割体の縁巻係合を用いた伸縮機能を有するものであれば同様に適用できることはいうまでもない。
【００６７】
更に、上記の各実施の形態では、金属箔成形体の外形は矩形形状を有しているが、他の多角形形状を外形とする金属箔成形体にも同様に適用できることはいうまでも無い。
【図面の簡単な説明】
【図１】この発明の第１の実施の形態によるレンジフード用フィルタカバーの外観形状を示した斜視図である。
【図２】図１のＩＩ−ＩＩラインから見た図であって、レンジフード用フィルタカバー１５の取付前の状態と取付後の状態とを示した図である。
【図３】図１の“Ｘ”部分の拡大斜視図である。
【図４】図３のＩＶ−ＩＶラインの端面図である。
【図５】図４で示した縁巻係合構造の製造手順を示した図である。
【図６】この発明の第２の実施の形態によるレンジフード用フィルタカバーの縁巻係合構造の構成を示した端面図である。
【図７】この発明の第３の実施の形態による換気扇カバーの取付状態を示した斜視図である。
【図８】従来のレンジフード用フィルタカバーの外観形状を示した斜視図である。
【図９】図８の“Ｙ”部分の拡大斜視図である。
【図１０】図８のＸ−Ｘラインから見たレンジフード用フィルタカバー７０の取付状態を示した図である。
【図１１】図８の“Ｚ”部分の拡大斜視図である。
【符号の説明】
１５…レンジフード用フィルタカバー
１６…第１の分割体
１７…第２の分割体
２３，２４…縁巻
３３，５０…第１ストレート部
３４，３８，５１，５４…テーパ部
３５，５２…第２ストレート部
３７，５３…ストレート部
４０，５５…内層縁巻
４１，５６…外層縁巻
４３…第１の平板
４４…第２の平板
４５，４５…端部
４７，４８…折返し片
尚、各図中同一符号は同一又は相当部分を示す。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an edge winding engagement structure, and more particularly to an edge winding engagement structure of a metal foil molded body formed by press forming an aluminum foil such as a filter cover for a range hood and a method for manufacturing the same.
[0002]
[Prior art]
FIG. 8 is a perspective view showing a schematic structure of a conventional filter hood for a range hood.
[0003]
Referring to the figure, the range hood filter cover 70 is composed of a first divided body 71 and a second divided body 72, and each is formed by molding a sheet of aluminum foil. A filter 73 and a filter 74 made of a nonwoven fabric or the like are attached to the center of each. Further, edge windings 75 a to 75 c are formed on the outer periphery of the first divided body 71, and edge windings 76 a to 76 c are formed on the outer periphery of the second divided body 72.
[0004]
A fixture 77 is attached to the edge winding 75 b of the first divided body 71, and a fixture 78 is attached to the edge winding 76 b of the second divided body 72.
[0005]
FIG. 9 is an enlarged perspective view of the “Y” portion of FIG.
[0006]
Referring to the drawing, the attachment 78 is composed of a yoke 80 having a U-shaped cross section, a magnet 81 attached to the inside of the yoke 80, and a bent portion 82 integrally connected to the yoke 80. The The bent portion 82 is not bent before the fixture 78 is attached to the second divided body 72, and an opening 84 is formed at a portion corresponding to the bent position.
[0007]
When attaching the fixture 78 to the second divided body 72, the bent portion 82 is passed through the opening 83 formed in the vicinity of the edge winding 76 b of the second divided body 72, and the yoke 80 is formed at the opening 84 portion. Bend in the direction of the back. In this way, the attachment 78 is rotatably attached around the edge winding 76b of the second divided body 72.
[0008]
On the other hand, the fixture 77 has the same structure, and is similarly rotatably attached to the edge winding 75b of the filter cover 70 for the range hood.
[0009]
FIG. 10 is a side view showing a state in which the range hood filter cover 70 of FIG. 8 is attached to an attached body.
[0010]
Referring to the drawing, the range hood filter cover 70 is attached to the attachment body 31 such as a range hood by the suction force of the attachment 77.
[0011]
FIG. 11 is an enlarged perspective view of the “Z” portion of FIG.
[0012]
Referring to the drawing, the edge winding 76a of the second divided body 72 is slidably inserted into the edge winding 75a of the first divided body 71. Thus, in the range hood filter cover 70, the edge winding 75a and edge winding 75c of the first divided body 71 and the edge winding 76a and edge winding 76c of the second divided body 72 are slidable. 8, the entire length of the range hood filter cover 70 can be expanded and contracted from the state shown in FIG. 8 so as to match the width of the attached body 31 such as the range hood to be attached. it can.
[0013]
[Problems to be solved by the invention]
In the edge winding engagement structure composed of two divided bodies such as the range hood filter cover as the conventional metal foil molded body as described above, both the edge winding 75a and the edge winding 76a have a constant diameter as shown in FIG. It is formed in a straight tube. Therefore, if force is applied in the direction in which the edge winding 76a is pulled out from the edge winding 75a in an attempt to increase the overall length of the range hood filter cover 70, the edge winding 76a will drop off and the engagement state will be released. There is a fear.
[0014]
Conversely, if the force is applied in the direction in which the edge winding 76a is pushed into the edge winding 75a in an attempt to reduce the overall length of the range hood filter cover 70, these engagement states become deeper than necessary. However, none of them was an easy-to-use edge winding engagement structure.
[0015]
The present invention has been made to solve the above-described problems, and an object thereof is to provide an edge winding engagement structure having a stopper function when adjusting the engagement state, and a manufacturing method thereof.
[0016]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 is characterized in that a second edge made of a metal foil molded body is formed on a first edge winding formed on a side edge of a first divided body made of a metal foil molded body. The edge winding engagement structure which slidably inserts the second edge winding formed on the side edge of the divided body, wherein the first edge winding is a first straight portion having a large diameter and a first straight portion One end of which is connected to the first taper portion, the diameter of which gradually decreases, and a second straight portion having a small diameter connected to the other end of the first taper portion. A second taper portion whose overall shape is similar to that of the first taper portion, and one end of the second taper portion, a portion of which is housed in the second straight portion; and Ri Do and a third straight portion of the slidable diameter, the end of the second straight portion, the bent inner Enmaki inwardly The outer layer edge winding bent outward is formed at the end of the second taper portion, the inner layer edge winding slidably contacts the outer surface of the third straight portion, and the outer layer edge winding is It contacts the inner surface of the first taper portion .
[0017]
With this configuration, when the second edge winding is pulled out from the first edge winding, the second taper portion of the second edge winding comes into contact with the first taper portion of the first edge winding. Further, the third straight portion does not slide in direct contact with the inner surface of the second straight portion.
[0020]
The invention according to claim 2 is formed on the side edge of the second divided body made of the metal foil molded body on the first edge winding formed on the side edge of the first divided body made of the metal foil molded body. The second edge winding is slidably inserted into the edge winding engagement structure, and the first edge winding is connected to the first straight portion having a small diameter and one end thereof connected to the first straight portion. Comprising a first taper portion that gradually increases and a large-diameter second straight portion connected to the other end of the first taper portion, and the second edge winding is housed inside the first taper portion, A third taper whose overall shape is connected to a second taper part similar to the first taper part and one end of the second taper, a part of which is housed in the second straight part, and a slidable diameter Ri Do from the parts, the end of the second straight portion, the inner layer edge winding bent inwardly is formed, the end of the second tapered portion Is an outer layer edge winding bent outwardly form the inner layer Enmaki is slidably in contact with the outer surface of the third straight portion, the outer layer Enmaki is for abutting the inner surface of the first taper portion is there.
[0021]
With this configuration, when the second edge winding is pushed into the first edge winding, the second taper portion of the second edge winding contacts the first taper portion of the first edge winding. . Further, the third straight portion does not slide in direct contact with the inner surface of the second straight portion.
[0024]
According to a third aspect of the present invention , the second edge winding formed on the side edge of the second divided body is slidably inserted into the first edge winding formed on the side edge of the first divided body. A method for manufacturing an edge winding engagement structure comprising a part of a first flat plate made of a metal foil for forming a second divided body and a metal foil for forming the first divided body A first step of overlapping a part of the second flat plate to align each edge, and a first straight portion having a constant diameter and a first straight so as to wind a predetermined range from the edge in the overlapped state. An edge winding comprising a second straight part having a constant diameter different from the diameter of the part , a taper part having both ends connected to the first straight part and the second straight part, and a diameter gradually changing, is connected to the first straight part. The part is only the second flat plate, and the taper portion and part of the second straight portion are the first flat plate and the second flat plate. Against the overlapping portion, the other part of the second straight portion, in which a second step of forming only for the first flat plate.
[0025]
If comprised in this way, the edge winding which has the taper part in the 1st flat plate and the 2nd flat plate will be integrally formed in the engagement state.
[0026]
According to a fourth aspect of the present invention, in the configuration of the third aspect of the invention, the first step includes a step of folding back the longitudinal end of the first flat plate to form a folded piece, and a length of the second flat plate. Forming a folded piece by folding the end of the direction, and in the state where each folded piece is formed, the first flat plate and the second flat plate are overlapped so that these folded pieces face each other It is.
[0027]
If comprised in this way, the 1st division body and the 2nd division body will each form the edge winding which wound a part of folding piece.
[0028]
【The invention's effect】
As described above, according to the first aspect of the present invention, when the second edge winding is pulled out from the first edge winding, the second taper portion comes into contact with the first taper portion. The movement of the edge winding is prevented, and the second edge winding is prevented from falling off from the first edge winding. Further, resistance due to movement of the third straight portion is reduced, and smooth movement becomes possible.
[0030]
According to a second aspect of the invention, since the second tapered portion when the shoehorn second Enmaki relative to the first edge winding comes into contact with the first tapered portion, the more second Enmaki Since the movement is prevented, the engaged state is stabilized. Further, resistance due to movement of the third straight portion is reduced, and smooth movement becomes possible.
[0032]
The invention according to claim 3 is an efficient and stable manufacturing method because the edge winding engagement structure having a stopper function is formed by one molding.
[0033]
In addition to the effect of the invention described in claim 3 , the invention described in claim 4 is in a state in which the open end of the edge winding is rounded, and the safety is further improved.
[0034]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view showing the external shape of a range hood filter cover according to a first embodiment of the present invention.
[0035]
Referring to the figure, the range hood filter cover 15 includes a first divided body 16 and a second divided body 17. The first divided body 16 is formed, for example, by molding an aluminum foil sheet, and a filter 20 made of a nonwoven fabric or the like is bonded to the opening at the center. Further, edge windings 23 a to 23 c are formed on both side edges of the first divided body 71 and the side edges opposite to the side engaged with the divided body second divided body 17. Further, a mounting tool 26 in which a magnet for mounting on a mounted body such as a wall surface of a range hood is embedded is rotatably mounted on the edge winding 23 b of the first divided body 16.
[0036]
On the other hand, the second divided body 17 is also formed by molding an aluminum foil sheet, and a filter 21 is similarly attached to the opening at the center. Similarly to the first divided body 16, edge windings 24 a to 24 c are formed on the side edges of the second divided body 17. Furthermore, a fixture 78 is rotatably attached to the edge winding 24b.
[0037]
FIG. 2 is a view as seen from the line II-II in FIG. 1 and shows a state before being attached to an attached body such as a range hood and a state after being attached.
[0038]
FIG. 2 (1) shows a state before the filter cover 15 for the range hood is attached, and the center line of the edge winding 23b of the first divided body 16 is curved upward at the portion where the fixture 26 is attached. The so-called arc shape is formed. That is, the position of the mounting surface of the mounting tool 26 before mounting, which is substantially flush with the lower end of the edge winding 23b, is opposite to the straight line 29 connecting both ends of the edge winding 23b toward the mounted body 31. Is separated by a distance S. Further, the mounting surface of the mounting tool 26 is positioned substantially aligned with the lower ridge line of the edge winding 23b. In this embodiment, the fixture 26 is located substantially at the center of the edge winding 23b, and the ratio of the distance L and the distance S between that position and the end of the edge winding 23b is 160: 2. ing. Similarly, the center line of the edge winding 24b of the second divided body 17 shown in FIG. 1 is also formed in the same arc shape.
[0039]
(2) of FIG. 2 is a view showing a state in which the range hood filter cover 15 in the state of (1) of FIG.
[0040]
Referring to the drawing, when fixture 26 is fixed to attached body 31, the curved state of edge winding 23b is deformed into a linear state as shown. Therefore, a force as indicated by an arrow is applied to the attached body 31 at both ends of the edge winding 23b. Thus, unlike the conventional example shown in FIG. 10, there is no possibility that a gap will be formed between both ends of the edge winding 23b and the attached body 31, and the attachment is made in a completely adhered state. Therefore, the mounting state is stabilized, and the clearance from the mounted body 31 is further reduced by the deformation of the edge winding 23b into a linear shape, and the amount of air entering from that portion can be reduced.
[0041]
In the above embodiment, the central axis of each of the edge winding 23b and the edge winding 24b constituting the rectangular opposing side is formed in an arc shape, but the edge winding 23a and the edge constituting the other opposing side are formed. Similarly, the winding 24a, the edge winding 23c, and the edge winding 24c may be formed so that their centerlines are arcuate.
[0042]
3 is an enlarged perspective view of a portion “X” in FIG. 1, and FIG. 4 is an end view taken along line IV-IV in FIG.
[0043]
Referring to these drawings, the edge winding 23a includes a first straight portion 33 having a large diameter, a second straight portion 35 having a smaller diameter smaller than the diameter of the first straight portion 33, and the first straight portion 33 and the second straight portion. 35 and a (first) tapered portion 34 whose diameter gradually changes so as to be continuously connected thereto.
[0044]
On the other hand, the edge winding 24a is housed inside the taper portion 34 of the edge winding 23a, and the overall shape thereof is similar to the taper portion 34 (second) taper portion 38, and the second straight portion 35 of the edge winding 23a. A part of the straight portion 37 is housed therein and is slidable (third). As shown in FIG. 4, the front end portion of the second straight portion 35 of the edge winding 23 a is bent inward to form an inner layer edge winding 40. Therefore, since the straight part 37 does not slide directly in contact with the inner surface of the second straight part 35, resistance due to movement of the straight part 37 is reduced, and smooth movement is possible. On the other hand, the front end of the taper portion 38 of the edge winding 24 a is bent outward to form an outer layer edge winding 41, which contacts the inner surface of the taper portion 34.
[0045]
Since the edge winding 23a and the edge winding 24a are configured in this way, the edge winding 24a is movable in the direction indicated by the two-dot chain line in FIG. 4, but the movement in the arrow direction is indicated by the solid line. At the position, the tapered portion 34 of the edge winding 23a and the tapered portion 38 of the edge winding 24a come into contact with each other, and the further movement stops. That is, the tapered portion 34 and the tapered portion 38 exhibit a stopper function.
[0046]
This engagement state is a so-called range hood in which further extension is prevented while the first divided body 16 and the second divided body 17 shown in FIG. 1 are stretched, while the engagement is deepened. This means that a smooth sliding operation is possible in the direction in which the filter cover 15 is contracted. Thus, even if the range hood filter cover 15 is unintentionally extended, it is possible to reliably prevent the first divided body 16 and the second divided body 17 from being disengaged.
[0047]
FIG. 5 is a view showing a process for press-molding the edge winding engagement structure shown in FIGS. 3 and 4.
[0048]
First, as shown in FIG. 5 (1), a rectangular flat plate-like second flat plate 44 corresponding to the first divided body 16 and a rectangular flat plate-like first flat plate 43 corresponding to the second divided body 17; Prepare. Then, the end portion 46 of the second flat plate 44 is bent inward to the first flat plate 43 side to form a folded piece 48, and similarly, the end 45 portion of the first flat plate 43 is set to the second flat plate 44 side. The folded piece 47 is folded.
[0049]
In this state, as shown in FIG. 5 (2), a part of the second flat plate 44 and a part of the first flat plate 43 are overlapped, and the part above the part indicated by the two-dot chain line is indicated by an arrow. The edge winding is formed by bending integrally in the direction.
[0050]
At this time, as shown in (3) of FIG. 5, the edge winding diameter of the area A is increased, and the edge winding diameter of the area C is made smaller than that of the area A. In the region B, the edge winding diameter is set so as to gradually change so as to be continuous with the edge winding diameters of the regions A and C. That is, the edge winding in the region A is only for the second flat plate 44, and the edge winding in the region B and a part of the edge winding in the region C are for the overlapping portion of the first flat plate 43 and the second flat plate 44. The other part of the edge winding in the region C is formed only on the first flat plate 43. Note that the setting of the edge winding diameter is performed by setting the dimensions of the mold when press forming.
[0051]
When the edge winding is integrally formed in the state where the second flat plate 44 and the first flat plate 43 are overlapped in this way, the shape of the edge winding 23a and the edge winding 24a shown in FIGS. It is formed in a state where the edge windings are engaged. That is, the first divided body 16 and the second divided body 17 are integrally press-molded at the same time so that the range hood filter cover 15 is stretched as shown in FIG. It will be.
[0052]
FIG. 6 is an end view showing an edge winding engagement structure between a first divided body and a second divided body of a filter cover for a range hood according to a second embodiment of the present invention.
[0053]
Referring to the figure, edge winding 23a of the first divided body includes a first straight portion 50 having a small diameter, a second straight portion 52 having a larger diameter than the diameter of first straight portion 50, and a first straight. The taper part 51 is connected between the part 50 and the second straight part 52, and the diameter thereof gradually changes so as to be continuously connected to the part.
[0054]
On the other hand, the edge winding 24a of the second divided body is housed in the second straight portion 52 and housed in the straight portion 53 having a slidable diameter and the taper portion 51 of the edge winding 23a, and The overall shape is composed of a tapered portion 51 and a tapered portion 54 similar to the tapered portion 51. The tip of the second straight portion 52 of the edge winding 23a is bent inward to form an inner layer edge winding 55. Therefore, since the straight part 53 does not slide in direct contact with the inner surface of the second straight part 52, resistance due to movement of the straight part 53 is reduced, and smooth movement is possible. On the other hand, the front end of the taper portion 54 of the edge winding 24 a is bent outward to form an outer layer edge winding 56, which contacts the inner surface of the taper portion 51.
[0055]
The edge winding 23a and the edge winding 24a are simultaneously formed by integral press molding as shown in FIG. 5 according to the first embodiment. When such an edge winding engagement structure is adopted, the edge winding 24a is movable in the direction indicated by the two-dot chain line, but when it is moved in the direction indicated by the arrow, the taper portion 54 and the edge of the edge winding 24a are moved. The taper portion 51 of the winding 23a abuts against each other and exhibits a stopper function that prevents further movement.
[0056]
Therefore, with such an edge winding engagement structure, the engagement state between the first divided body 16 and the second divided body 17 constituting the filter cover 15 for the range hood can be further deepened in FIG. When the entire length of the filter cover 15 is reduced, the final stop position of these engagements can be set.
[0057]
In the structure shown in FIG. 6, when the edge winding 24a is moved in the direction indicated by the two-dot chain line, the outer layer edge winding 56 of the edge winding 24a and the inner layer edge winding 55 of the edge winding 23a are finally applied. There is no fear that the edge winding 24a will separate from the edge winding 23a and fall off. That is, in the edge winding engagement structure of FIG. 6, it can be said that both have a stopper function not only in the direction of the arrow but also in the movement in the opposite direction. Therefore, if this edge winding engagement structure is adopted according to the application, it is possible to provide a more useful function for a structure that is slid through the edge winding.
[0058]
FIG. 7 is a perspective view showing an attached state of the ventilation fan cover according to the third embodiment of the present invention.
[0059]
Referring to the drawing, a ventilation fan cover 58 is formed with a bulging portion 64 formed at the center thereof and having a filter 63 attached to the opening thereof, and a flange portion extending outwardly from the outer periphery of the bulging portion 64. 59 and edge winding 62a to edge winding 62d formed on the entire outer periphery of the flange portion 59. On both side portions of the flange portion 59, attachment portions 60 that engage with attachment fittings 61 fixed to the ventilation fan frame 57 to be attached are formed. As a result, the ventilation fan cover 58 is attached in a state where the flange portion 59 is pressed against the attachment surface of the ventilation fan frame 57.
[0060]
The two-dot chain line shown in the figure is a state before the ventilation fan cover 58 is attached, and shows the positions of the edge winding 62a and the edge winding 62b on the side where the attachment portion 60 is formed. As described above, both the edge winding 62a and the edge winding 62b are formed in an arc shape such that the central portion thereof is curved in a direction opposite to the ventilation fan frame 57 from a straight line connecting the both end portions. Therefore, at the time of attachment, the edge winding 62a and the edge winding 62b are linearly deformed by the attachment metal fitting 61 engaged with the attachment portion 60. For this reason, the edge winding 62c and the edge winding 62d are more strongly restrained to the attachment surface of the ventilation fan frame 57, and the attachment state of the ventilation fan cover 58 is stabilized.
[0061]
In any of the above-described embodiments, the surface shape of the mounted body is a flat surface, but it can also be applied to a mounted body having a curved surface shape or the like. In this case, the metal foil is set so that the distance between the mounting surface of the mounting tool and the mounted body is larger than one half of the sum of the distances between both ends of the side to which the mounting tool is mounted and the mounted body. What is necessary is just to set the shape of a molded object. If it does in this way, since the edge | side in which the fixture was attached will deform | transform so that the surface shape of a to-be-attached body may be met, the both ends of a fixture will be pressed on a to-be-attached body, and an attachment state will be stabilized.
[0062]
Further, in each of the above-described embodiments, the attachments 26 and 27 are attached at substantially the center of the attachment side. However, if the attachments 26 and 27 are attached at positions other than both ends of the attachment side, the attachment state is similarly stabilized.
[0063]
Further, in the above embodiment, a fixture using a magnet or a fitting portion that engages with a fitting is used as a fixing means for the metal foil molded body. However, other than these, for example, fixing of adhesive tape, double-sided fasteners, clips, etc. Means can be used as well.
[0064]
Furthermore, in each of the embodiments described above, a pair of fixtures are attached to opposite sides, but the same effect can be obtained even if the fixtures are attached only to one of the sides.
[0065]
Furthermore, in the above embodiment, the edge winding is formed on the outer peripheral side of the metal foil molded body, but from the viewpoint of stabilizing the mounting state, the fixture is directly attached to the side where the edge winding is not formed. It may be attached.
[0066]
Furthermore, even if it is a metal foil molded body other than the filter cover for the range hood shown as the above embodiment, it can be similarly applied as long as it has an expansion / contraction function using edge winding engagement of two or more divided bodies. Needless to say, it can be done.
[0067]
Furthermore, in each of the embodiments described above, the outer shape of the metal foil molded body has a rectangular shape, but it goes without saying that it can be similarly applied to a metal foil molded body having an outer shape of another polygonal shape. .
[Brief description of the drawings]
FIG. 1 is a perspective view showing the external shape of a filter cover for a range hood according to a first embodiment of the present invention.
FIG. 2 is a view as seen from the line II-II in FIG. 1 and shows a state before and after attachment of the range hood filter cover 15;
FIG. 3 is an enlarged perspective view of a portion “X” in FIG. 1;
4 is an end view taken along line IV-IV in FIG. 3;
5 is a view showing a manufacturing procedure of the edge winding engagement structure shown in FIG. 4; FIG.
FIG. 6 is an end view showing a configuration of an edge winding engagement structure of a filter cover for a range hood according to a second embodiment of the present invention.
FIG. 7 is a perspective view showing an attached state of a ventilation fan cover according to a third embodiment of the present invention.
FIG. 8 is a perspective view showing the appearance of a conventional range hood filter cover.
9 is an enlarged perspective view of a “Y” portion in FIG. 8;
10 is a view showing an attached state of the range hood filter cover 70 as seen from the line XX in FIG. 8. FIG.
11 is an enlarged perspective view of a “Z” portion in FIG. 8;
[Explanation of symbols]
15 ... Range hood filter cover 16 ... 1st divided body 17 ... 2nd divided body 23, 24 ... Edge winding 33, 50 ... 1st straight part 34, 38, 51, 54 ... Tapered part 35, 52 ... 1st 2 straight portions 37, 53 ... straight portions 40, 55 ... inner layer edge windings 41, 56 ... outer layer edge windings 43 ... first flat plate 44 ... second flat plates 45, 45 ... end portions 47, 48 ... folded pieces, In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims

The second edge winding formed on the side edge of the second divided body made of the metal foil molded body is slid onto the first edge winding formed on the side edge of the first divided body made of the metal foil molded body. An edge winding engagement structure to be inserted freely,
The first edge winding has a first straight portion having a large diameter, a first taper portion whose one end is connected to the first straight portion, the diameter of which gradually decreases, and the other end of the first taper portion. It consists of a small diameter second straight part connected,
The second edge winding is housed inside the first taper portion, and is connected to a second taper portion whose overall shape is similar to the first taper portion and one end of the second taper portion, partially housed inside the 2 straight portion, and Ri Do and a third straight portion of the slidable diameter,
An inner layer edge winding bent inward is formed at the end of the second straight portion,
At the end of the second tapered portion, an outer layer edge winding bent outward is formed,
The inner layer edge winding slidably contacts the outer surface of the third straight portion,
The outer layer edge winding is an edge winding engagement structure that abuts against the inner surface of the first taper portion .

The second edge winding formed on the side edge of the second divided body made of the metal foil molded body is slid onto the first edge winding formed on the side edge of the first divided body made of the metal foil molded body. An edge winding engagement structure to be inserted freely,
The first edge winding has a first straight portion with a small diameter, a first taper portion whose one end is connected to the first straight portion, and the diameter gradually increases, and the other end of the first taper portion. It consists of a large diameter second straight part connected,
The second edge winding is housed inside the first taper portion, and is connected to a second taper portion whose overall shape is similar to the first taper portion and one end of the second taper portion, partially housed inside the 2 straight portion, and Ri Do and a third straight portion of the slidable diameter,
An inner layer edge winding bent inward is formed at the end of the second straight portion,
At the end of the second tapered portion, an outer layer edge winding bent outward is formed,
The inner layer edge winding slidably contacts the outer surface of the third straight portion,
The outer layer edge winding is an edge winding engagement structure that abuts against the inner surface of the first taper portion .

Manufacturing of edge winding engagement structure in which second edge winding formed on side edge of second divided body is slidably inserted into first edge winding formed on side edge of first divided body A method,
A portion of the first flat plate made of the metal foil for forming the second divided body is overlapped with a portion of the second flat plate made of the metal foil for forming the first divided body. A first step of aligning the edges,
The first straight portion having a constant diameter and a second straight portion having a constant diameter different from the diameter of the first straight portion so as to wind a predetermined range from the edge in the overlapped state, and the first straight portion And an edge winding composed of a taper portion whose both ends are connected to the second straight portion and the diameter gradually changes, and the first straight portion is formed only on the second flat plate, the taper portion and the second straight plate portion. A part of the second straight part is formed with respect to the overlapping part of the first flat plate and the second flat plate, and another part of the second straight part is formed only with respect to the first flat plate. The manufacturing method of an edge winding engagement structure provided with 2 processes.

The first step includes
Folding the longitudinal end of the first flat plate to form a folded piece;
A step of folding back the longitudinal end of the second flat plate to form a folded piece,
The manufacturing method of the edge winding engagement structure of Claim 3 which overlaps the said 1st flat plate and the said 2nd flat plate so that these folding pieces may face each other in the state in which each of the said folding pieces was formed.