JP4789346B2 - Net site for processing and manufacturing method thereof - Google Patents

Description

【数２】

ここに、ｔ_０は、３．５ｇ／ｃｍ^２（０．３４３ｋＰａ）で加圧したときの厚さ（ｍｍ）であり、ｔ_１は、２００ｇ／ｃｍ^２（１９．６ｋＰａ）で加圧したときの厚さ（ｍｍ）であり、ｔ’_０は、再び３．５ｇ／ｃｍ^２（０．３４３ｋＰａ）で加圧したときの厚さ（ｍｍ）である。
【００２５】
側縁部位２０，２１及び第１の裁断部位２２と他の部位２３，２４に係る上記した圧縮率の差は、５％以上であることが好ましい。側縁部位２０，２１及び第１の裁断部位２２の圧縮率を他の部位２３，２４よりも５％以上高く設定することにより、例えば、裁断工程でいえば、それらの部位はいわば切り欠きのような役割を果たすため、裁断手法の種類に拘わらず裁断し易くなり、端末処理工程においては表面メッシュ層１１と裏面メッシュ層１２間の厚みを薄くして剛性を高める振動溶着作業が行い易くなる。圧縮率の差は１０％以上であることがより好ましい。
【００２６】
但し、例えば、加工処理対象となる側縁部位２０，２１及び第１の裁断部位２２の圧縮率を高く設定し過ぎ、剛性をきわめて低いものとすると、端末処理工程における振動溶着作業を実施するために必要な剛性を確保できなくなることから、上記した圧縮率の差は、１０〜７０％の範囲であることがより好ましい。
【００２７】
加工処理対象となる側縁部位２０，２１及び第１の裁断部位２２と他の部位２３，２４との間で厚み方向の圧縮率に差を設ける手段は任意であるが、例えば、次のような手段が挙げられる。
【００２８】
まず、ネット組織の密度を変化させる手段、すなわち、加工処理対象となる側縁部位２０，２１及び第１の裁断部位２２のネット組織の密度を、他の部位２３，２４に係るネット組織の密度よりも、粗にする手段が挙げられる。
【００２９】
ネット組織の密度を変化させる具体的な手段としては、表面メッシュ層１１のメッシュ形状、表面メッシュ層１１のメッシュサイズ、裏面メッシュ層１２のメッシュ形状、裏面メッシュ層１２のメッシュサイズ、パイル１３の配設密度、表面メッシュ層１１と裏面メッシュ層１２と間のパイル１３の長さ（パイル層の厚み）、及びパイル１３の太さのうちのいずれか１つの要素又は任意の２つ以上の要素の組み合わせにより調整する手段が挙げられる。
【００３０】
すなわち、加工用ネット地１０を編む（又は織る）際に、加工処理対象となる側縁部位２０，２１及び第１の裁断部位２２を形成する段階に至ったならば、上記のいずれかの要素が変化するように、例えば、表面メッシュ層１１又は裏面メッシュ層１２のメッシュサイズを大きくしたり、メッシュ形状を細目からハニカム状に変えたり、パイル１３の編み込み（織り込み）間隔を広くし、単位長さ当たりの編み込み（織り込み）本数を少なくしたりする。
【００３１】
より具体的には、例えば、パイル１３の編み込み本数を調整することにより、図４に示した三次元構造の加工用ネット地１０を製作する場合には、編み機に内蔵されるマイクロコンピュータに、パイル１３の編み込み本数を減らす位置、編み込み本数等の諸条件を予め設定しておくことにより行うことができる。例えば、幅９７０ｍｍの加工用ネット地１０を編む場合には、一方の側部ライン２０ａから内側に、数ｍｍのヒートセット用治具の掴み代２０ｂを除いた３０ｍｍの範囲においてパイル１３の編み込み本数を少なくして一方の側縁部位２０を形成し、続いてパイル１３の編み込み本数を増加させて、バック部用ネット１０ａを構成する他の部位２３を形成し、幅方向中央位置５０ｍｍの範囲において、再びパイル１３の編み込み本数を少なくして第１の裁断部位２２を形成する。さらに、パイル１３の編み込み本数を増加させてクッション部用ネット１０ｂを構成する他の部位２４を形成した後、他方の側部ライン２１ａから内側に３０ｍｍの範囲においてはパイル１３の編み込み本数を少なくし（但し、ヒートセット用治具の掴み代２１ｂを除く）、他方の側縁部位２１を形成する。
【００３２】
なお、ヒートセットとは、編み上げ後、治具（図示せず）により上記の各掴み代２０ｂ，２１ｂを掴んで引っ張りながら熱をかけて、編み縮みを矯正することをいい、加工用ネット地１０は、通常、ヒートセット後、ロール反に巻き取られて出荷される。但し、本実施形態によれば、側縁部位２０，２１及び第１の裁断部位２２のように、ネット組織の密度を粗にすること等により圧縮率が相対的に高い部位を有していることから、編み縮みによる反り具合が、従来の圧縮率が均等（ネット組織の密度が均等）のものと比較して、少ない。従って、ヒートセット作業も行い易く、短時間で済む。
【００３３】
加工用ネット地１０の厚み方向における圧縮率を部分的に変化させる手段としては、上記のほか、表面メッシュ層１１、裏面メッシュ層１２及びパイル１３を構成する各繊維のうち、いずれか少なくとも１つ以上において、繊維の材質を変える手段が挙げられる。例えば、パイル１３として、他の部位２３，２４においては、高い剛性を発揮できる、ポリエステルやポリプロピレン繊維等を用い、側縁部位２０，２１及び第１の裁断部位２２を形成する際には、これよりも剛性の低い、ナイロンやＰＢＴ繊維等を用いて製作する。
【００３４】
また、前記圧縮率を、表面メッシュ層１１、裏面メッシュ層１２及びパイル１３を構成する各繊維のうち、いずれか少なくとも１つ以上において、繊維の種類を変えることにより調整することもできる。ここでいう繊維の種類には、単繊維（モノフィラメント）、糸（マルチフィラメント）及び紡績糸などがあり、例えば、材質、太さ（外径）が同じであれば、マルチフィラメントよりもモノフィラメントの方が剛性が高い。従って、例えば、パイル１３として、他の部位２３，２４においてモノフィラメントを用い、側縁部位２０，２１及び第１の裁断部位２２において同じ材質でかつ同じ太さのマルチフィラメントを用いることにより、これらの部位２０〜２２における圧縮率を相対的に高くすることができる。
【００３５】
なお、圧縮率を変化させる際に上記の手段を適宜に２以上組み合わせることももちろん可能であり、例えば、側縁部位２０，２１及び第１の裁断部位２２においてマルチフィラメントを用いると共に、繊維の太さを他の部位２３，２４に編み込まれたパイル１３を構成しているモノフィラメントよりも細くしたり、剛性の弱い材質のものを採用したり、さらには、ネット組織の密度を粗にする手段のいずれか１つ以上の要素を適宜に組み合わせることもできる。
【００３６】
表１に、他の部位２３，２４において自動車用シートのバック部又はクッション部として適する特性を発揮できると共に、側縁部位２０，２１及び第１の裁断部位２２において加工しやすい特性を発揮できる加工用ネット地１０の諸特性を例示する。なお、表１で示したものは、全てパイル１３の単位長さ当たりの配設本数を調整することで、圧縮率を調整したものである。
【００３７】
【表１】

【００３８】
表１において、「ｄ」はデニールを表し、１ｄは１グラムの繊維を９，０００ｍ引っ張ったときの太さの単位であり、例えば、２２０ｄは１グラムの繊維を９，０００／２２０＝４０．９ｍ引っ張ったときの太さの繊維である。「ｆ」はフィラメントを表し、単繊維の数を示す単位で、例えば、７０ｆは７０本の単繊維で１本の糸を構成していることを意味する。引張強度の「ｋｇ／５ｃｍ」は、５ｃｍ幅のものを引っ張ったときの強度である。パイル組織の「パラレル」は表面メッシュ層１１と裏面メッシュ層１２とを連結するパイル１３が側面から見て交差していない状態をいい、「クロス」とは側面から見て交差している状態をいう。
【００３９】
なお、パイル１３の配設の仕方（パイル組織）としては、表面メッシュ層１１と裏面メッシュ層１２とを連結するパイル１３の側面から見た状態で表すと、より具体的には、例えば、図１０に示したような種類に分類される。（ａ），（ｂ）は、表面メッシュ層１１を構成する各糸に対し、これに対向する裏面メッシュ層１２を構成する各糸との間にパイル１３が配設されているストレートタイプであり、このうち（ａ）は８の字状にしてストレートに編んだもので、（ｂ）は単純なストレートに編んだものである。（ｃ）〜（ｅ）は、表面メッシュ層１１の隣接する各糸と、これに裏面メッシュ層１２の隣接する各糸との間で、パイル１３が中途で交差するように編んだクロスタイプであり、このうち（ｃ）は８の字状にクロスさせたもの、（ｄ）は単純なクロスに編んだもの、（ｅ）は２本ずつまとめてクロス（ダブルクロス）させたものである。
【００４０】
次に、上記した三次元構造の加工用ネット地１０を用いて自動車用シートを加工する工程を説明する。
まず、図４に示したように、ロール反となっている加工用ネット地１０を引き出し、取扱い易い任意の長さで幅方向に沿って裁断する。次に、図５に示したように、幅方向に沿って、バック部用ネット１０ａとクッション部用ネット１０ｂとが一体となった状態の一組ずつのシート用ネット１０ｃに裁断する。
【００４１】
次に、任意の裁断機、例えば、ウオータジェット式のカッタの加工台に、図６に示したように、裁断した各組のシート用ネット１０ｃを複数枚積層して載せて位置合わせする。そして、このカッタを起動させて高圧水により第１の裁断部位２２の予定の裁断ライン２２ａ，２２ｂに沿って裁断する。この際、本実施形態によれば、第１の裁断部位２２の圧縮率が他の部位２３，２４よりも高く設定されており、圧縮し易く、加工用ネット地１０が三次元構造であるが故に裁断性を損なう弾性力に起因した障害が減殺される。すなわち、従来のものは、他の部位２３，２４と第１の裁断部位２２とが同じ圧縮率であると共に、クッション部やバック部等としての特性を発揮するのに必要な圧縮率であったため、比較的低い圧縮率で高い圧縮弾性率（弾性率）に設定されている。このため、複数枚重ね合わせて裁断する場合には、弾性力が抵抗となり、裁断ラインが曲がったり、また、下方から高圧水を供給するウオータジェット式のカッタで裁断する場合には、上部に重ねられたものまで裁断できなかったりしていたが、本実施形態によれば、第１の裁断部位２２の圧縮率が高いため、予め切り欠きを形成した場合と同様の機能を果たし、複数枚積層した状態であっても、ほとんど位置ずれを起こすことなく、予定の位置から正確に裁断できる。
【００４２】
なお、表１からも明らかなように、圧縮率と弾性率とは必ず反比例関係にあるというものではなく、圧縮率が高くて弾性率も高い場合や、この逆の場合もある。しかしながら、いずれにしても、圧縮率が相対的に高くなっていれば、たとえ弾性率がそれほど低くなくても裁断や振動溶着が行い易くなることに変わりはない。
【００４３】
次に、第１の裁断部位２２からバック部用とクッション部用に分断した各ネット１０ａ，１０ｂを、バック部用ネット１０ａ同士、クッション部用ネット１０ｂ同士でそれぞれ複数枚重ね合わせ、さらに、側縁部位２０，２１において破線で示した裁断ライン２０ｃ，２１ｃに沿ってカットする（図４〜図６参照）。この場合も、側縁部位２０，２１の圧縮率が上記のように設定されているため、第１の裁断部位２２に沿ってカットする場合と同様、容易かつ正確に裁断加工することができる。
【００４４】
このようにして、バック部用ネット１０ａ及びクッション部用ネット１０ｂを切り出したならば、さらに細部を裁断加工して図７の第１工程に示したような所望の形状にする。
【００４５】
バック部用ネット１０ａは、さらに、第２工程においてシートフレームに連結する際に使用されるワッシャ６１が両側部に縫製により取り付けられ、第３工程において化粧用のトリム６３が端末に縫製により取り付けられる。クッション部用ネット１０ｂは、さらに、第２工程において余分な端末がカットされ、第３工程において端末にトリム６４が縫製により取り付けられる。
【００４６】
この際、本実施形態によれば、化粧用のトリム６３，６４を、相対的に圧縮率を高く設定した上記の側縁部位２０，２１等に設ける場合には、例えば、ネット組織の密度が粗であるため、縫製を行い易く、縫製時の針の折れ等を防止することができる。
【００４７】
一方、上記のバック部用ネット１０ａ、クッション部用ネット１０ｂと同様に、ネット状加工地１０から別途に裁断加工したベースネット３０を準備する（図７の第１工程）。このベースネット３０も加工処理対象となる部位の厚み方向の圧縮率は、他の部位の厚み方向の圧縮率より高くなるように形成されている。そして、第２工程において、圧縮率が高くなるように形成している側縁部の一部３１，３２を内側に折り返して振動溶着し、第３工程において補強用ベルト６５を適宜部位に振動溶着により取り付ける。
【００４８】
以上のようにして、バック部用ネット１０ａ、クッション部用ネット１０ｂ及びベースネット３０のそれぞれの加工が終了したならば、第４工程において、これらを組み付ける。組み付けに当たっては、バック部用ネット１０ａ又はクッション部用ネット１０ｂの側縁部位２０，２１又は第１の裁断部位２２を、図８に示したように、ベースネット３０において圧縮率が高くなるように形成した部位３０ａに振動溶着により固着して一体化する。この際、振動溶着用の治具５０、５０間に、合成樹脂製のプレート４０を配置して、このプレート４０も一緒に振動溶着する。
【００４９】
振動溶着は、強固な接合力が得られ、振動溶着を施した部分では、表面メッシュ層１１、裏面メッシュ層１２及びパイル１３が相互に溶着して、側縁部位２０，２１、第１の裁断部位２２を形成している表面メッシュ層１１と裏面メッシュ層１２とが近接した状態で固定され硬くなっている。これにより、このようにして振動溶着処理（端末処理）を施した部分を、シートフレームにネジ止めあるいは引っ掛け等によって係止することが可能となるものであるが、本実施形態によれば、振動溶着の対象となる側縁部位２０，２１及び第１の裁断部位２２の厚み方向における圧縮率が他の部位２３，２４よりも高いため、ベースネット３０に対する振動溶着処理を裁断処理後直接行うことができる。
【００５０】
これに対し、従来の加工用ネット地を用いた場合には、振動溶着処理対象となる部位の圧縮率が他の部位と同じであったため、裁断加工後、本実施形態のようにベースネット３０に直接振動溶着処理を施しても、両者が容易には溶着しなかった。このため、従来は、バック部用ネット１０ａ及びクッション部用ネット１０ｂの場合には、裁断加工後、例えば、図７の第１工程と第２工程との間で、ベースネット３０の場合には、例えば、第３工程で補強用ベルト６５を取り付けた後に、組み付け時に振動溶着処理対象となる部位をそれぞれ単独で振動溶着して予め半潰しの状態にしておく加工工程が必要であった。しかしながら、本実施形態によれば、かかる半潰し加工する工程を不要とすることができ、ネット製品を製作するに当たっての加工工程の簡略化、製造コストの低減化を図ることができる。また、振動溶着処理は、熱により繊維自身の機械的特性を減じるものでもあるが、振動溶着処理工程の回数が減ることにより、繊維自身の機械的特性の低下度合いを少なくすることができる。
【００５１】
また、本実施形態によれば、振動溶着処理対象となる部位の圧縮率が相対的に高いことにより、振動溶着が確実に行われることから、振動溶着されずに一部のパイル１３が端面から飛び出したりすることも防止できる。
【００５２】
なお、振動溶着による端末処理には、上記した図７の第４工程のみに限られるものではなく、シートフレーム等にネジ止めや引っ掛けなどによりネットを固定するに当たり、端末部である側縁部位２０，２１又は第１の裁断部位２２の剛性を高めるため、バック部用ネット１０ａ又はクッション部用ネット１０ｂ等の各端末部の所定箇所をそれぞれ単独で、振動溶着することもある。例えば、端末部に相当する部位の表面メッシュ層１１、裏面メッシュ層１２及びパイル１３を相互に溶着して、側縁部位２０，２１を形成している表面メッシュ層１１と裏面メッシュ層１２とを近接させた状態で固定して所定の硬度を確保したり、かかる手段を施した上で、さらに合成樹脂製のプレート（図８参照）を振動溶着により固着する場合等がある。このような端末処理を行う場合にも、本実施形態によれば、加工処理対象となる部位の圧縮率を高く設定してあるため、従来よりも容易に行うことができる。
【００５３】
図９は、本発明の他の実施形態にかかる加工用ネット地１０を示す平面図である。この加工用ネット地１０の場合には、幅方向に沿って、バック部用ネット１０ａとクッション部用ネット１０ｂとが一体となった状態の一組ずつのシート用ネット１０ｃ（図５参照）に裁断する部位を第２の裁断部位２５とし、この第２の裁断部位２５に当たる部分も所定幅で厚み方向の圧縮率を他の部位２３，２４よりも高くなるように形成している。
【００５４】
これにより、第２の裁断部位２５の所定の裁断ラインに沿って裁断する作業を、上記第１の裁断部位２２に沿って裁断する場合と同様に容易にでき、裁断加工精度を上げることができる。また、第２の裁断部位２５における振動溶着処理（端末処理）の加工性も上記実施形態の第１の裁断部位２２と同様に向上させることができる。
【００５５】
なお、本発明の加工用ネット地１０は、裁断や振動溶着等の加工処理対象となる部位における厚み方向の圧縮率が他の部位２３，２４と比較して高くなるように形成されていればよく、加工処理対象となる部位が上記した各実施形態に限定されるものではないことはもちろんである。目的とするネット製品によって加工処理対象となる部位が異なるため、圧縮率を相対的に高くする部位はそれに合わせて形成すればよい。
【００５６】
また、上記した説明では、自動車用シートに加工される場合を例にとり説明しているが、車椅子用シート、学習机や事務机などに使用される家具用の椅子、映画館等における座席シート等に適用することもできる。
【００５７】
【発明の効果】
以上説明したように、本発明の加工用ネット地によれば、裁断や振動溶着等の加工処理対象となる部位における厚み方向の圧縮率が他の部位と比較して相対的に高くなるように形成されている。従って、三次元構造でありながら、ネット製品に加工する際の加工性に優れ、これらの加工工程を簡略化でき、ネット製品の製造コストを低減させることができる。
【図面の簡単な説明】
【図１】図１は、本発明の一の実施形態にかかる加工用ネット地の一部を示す断面図である。
【図２】図２は、図１に示した加工用ネット地の表面メッシュ層を示す拡大図である。
【図３】図３は、図１に示した加工用ネット地の裏面メッシュ層を示す拡大図である。
【図４】図４は、上記実施形態にかかる長尺な加工用ネット地を示す平面図である。
【図５】図５は、加工用ネット地から切り出した一組のシート用ネットを示す平面図である。
【図６】図６は、シート用ネットを複数枚重ねて裁断する工程を説明するための図である。
【図７】図７は、裁断加工したバック部用ネット、クッション部用ネットを用いてネット製品である自動車用シートを製作する工程を説明するための図である。
【図８】図８は、振動溶着工程を説明するための図である。
【図９】図９は、他の実施形態にかかる長尺な加工用ネット地を示す平面図である。
【図１０】図１０は、パイル組織の種類を示す図である。
【符号の説明】
１０ 加工用ネット地
１０ａ バック部用ネット
１０ｂ クッション部用ネット
１０ｃ シート用ネット
１１ 表面メッシュ層
１２ 裏面メッシュ層
１３ パイル
２０，２１ 側縁部位
２２ 第１の裁断部位
２３，２４ 他の部位
２５ 第２の裁断部位
３０ ベースネット
４０ プレート[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a processing net having a three-dimensional structure.
[0002]
[Prior art]
2. Description of the Related Art In recent years, net products using a net having a three-dimensional structure that can exhibit high cushioning properties even when thin and have a large number of voids and excellent air permeability as compared with pad materials such as urethane are known. The surface mesh layer and the back mesh layer are connected by a large number of piles to form a truss structure (three-dimensional structure), making it an elastic structure that is difficult to loosen. Are better. As a net product using such a net having a three-dimensional structure, for example, it is realized as a seat for a vehicle such as an automobile.
[0003]
As described above, a net with a three-dimensional structure is formed by weaving a pile as an intermediate layer on the front mesh layer and the back mesh layer, but the form of the raw material for processing (processing) before processing into any net product It is usually provided as a roll that is formed into a long belt shape having a necessary width and wound in a roll shape. A net product processor rotates the roll in the unwinding direction, pulls out a net for processing, cuts it, performs processing such as vibration welding and sewing, and processes it into a predetermined net product.
[0004]
[Problems to be solved by the invention]
However, the conventional processing net fabric has a full range of knitting (or weaving) conditions such as the shape and size of each mesh of the front mesh layer and the back mesh layer, and the number of piles (weaving) connected to these meshes. It is almost constant over time. Accordingly, the compressibility in the thickness direction is almost constant at any part of the processing net. This compression rate is determined in consideration of various properties such as elasticity and damping required for use when processed as a net product. For this reason, for example, in the case of an automobile sheet, the processing net base of the three-dimensional structure, which is the raw material for processing, is manufactured at a compression rate suitable for use as an automobile seat in all of its parts.
[0005]
In this way, when it is formed at a compression rate suitable for the characteristics required as a net product, as a portion to be processed, the compression rate is relatively low, while the compression elastic modulus is relatively high, For example, in the cutting process, there is a problem that the elastic force becomes resistance and is difficult to cut. The cutting process is usually performed by cutting from a roll to a predetermined length of processing net, and then stacking a plurality of these into a desired shape into a press machine, a cutter equipped with a cutting blade, and water using high-pressure water Cutting is performed using a jet-type cutter or the like, but there is a problem in that misalignment is likely to occur due to resistance, particularly when cutting a plurality of sheets. Further, even in the vibration welding process and the sewing process performed for terminal processing, there is a problem that these operations are difficult to perform when the compression rate is low.
[0006]
  The present invention has been made in view of the above circumstances, and in manufacturing a net product using a processing net as a processing raw material, it is easier to perform processing such as cutting, welding, or sewing than before. 3D structure processing net ground that can simplify these processing steps and reduce the cost of manufacturing net products.And its manufacturing methodIt is an issue to provide.
[0007]
[Means for Solving the Problems]
  In order to solve the above-described problems, the processing net ground according to the first aspect of the present invention is a tertiary material in which the surface mesh layer and the back surface mesh layer are joined by a large number of piles and used as a raw material for processing an arbitrary net product. A net structure for processing of the original structure,
  In each processing step of the arbitrary net productThe following formula for the part that is subject to cutting or terminal processing:
Compression rate (%) = {(t ₀ -T ₁ ) / T ₀ } × 100
(Where t ₀ Is 3.5 g / cm ² Thickness (mm) when pressurized at (0.343 kPa), t ₁ Is 200 g / cm ² (Thickness (mm) when pressurized at 19.6 kPa))
Indicated byThe compression ratio in the thickness direction is formed so as to be relatively higher than the compression ratio in the thickness direction of other portions.
[0008]
  The processing net according to claim 2 of the present invention is the processing net according to claim 1,Used as a raw material for processing to process as a net for the back part of the seat and a net for the cushion part,
Having a width capable of cutting out the back portion net on one side and the cushion portion net on the other side with respect to the first cut portion in the center in the width direction;
Since the first cutting part and the side edge part of a predetermined width along each side line are subject to terminal processing by vibration welding, the compression ratio in the thickness direction of the first cutting part and each side edge part is different from that of the other part. It is formed so as to be relatively higher than the compressibility in the thickness direction of the part..
[0009]
  The processing net according to claim 3 of the present invention is the processing net according to claim 2,The back net on one side and the net for cushion on the other side based on the first cutting site are used as a set of sheet nets, and the space between adjacent sets of sheet nets is the second cutting site. In order to make this second cutting part a terminal treatment object by vibration welding, the compression rate in the thickness direction is formed to be relatively higher than the compression rate in the thickness direction of other parts. It is characterized by.
[0010]
  The processing net according to claim 4 of the present invention is the processing net according to any one of claims 1 to 3,Difference in compressibility in the thickness direction between the terminal processing target part and other parts is 5% or moreIt is characterized by being.
[0011]
  The processing net according to claim 5 of the present invention is the processing net according to claim 4,The difference in compressibility in the thickness direction between the part to be processed by the terminal and other parts is in the range of 10 to 70%.It is characterized by that.
[0012]
  The processing net according to claim 6 of the present invention is the processing net according to any one of claims 1 to 5,The compression ratio is adjusted by the density of the net organizationIt is characterized by that.
[0013]
  The processing net of the present invention according to claim 7 is:Claim 6The processing net place described,The density of the net structure is the mesh shape of the front surface mesh layer, the mesh size of the front surface mesh layer, the mesh shape of the back surface mesh layer, the mesh size of the back surface mesh layer, the pile arrangement density, and between the front surface mesh layer and the back surface mesh layer. The length of the pile and the thickness of the pile are adjusted by any one element or a combination of any two or more elements.It is characterized by that.
[0014]
  The processing net according to claim 8 of the present invention is the processing net according to any one of claims 1 to 7,The compression ratio is adjusted by changing the material or type of the fiber in at least one of the fibers constituting the front mesh layer, the back mesh layer, and the pile.It is characterized by that.
[0015]
  The processing net place of the present invention according to claim 9The manufacturing method is a manufacturing method of a processing net base of a three-dimensional structure in which the front surface mesh layer and the back surface mesh layer are combined by a number of piles and used as a raw material for processing an arbitrary net product,
The following formula at a part to be subjected to cutting or terminal processing in each processing step of the arbitrary net product:
Compression rate (%) = {(t ₀ -T ₁ ) / T ₀ } × 100
(Where t ₀ Is 3.5 g / cm ² Thickness (mm) when pressurized at (0.343 kPa), t ₁ Is 200 g / cm ² (Thickness (mm) when pressurized at 19.6 kPa))
The compression ratio in the thickness direction indicated by is knitted so as to be relatively higher than the compression ratio in the thickness direction of other parts..
  The processing net according to claim 10 of the present invention.The manufacturing method of a processing net according to claim 9, wherein the processing net is used as a raw material for processing for processing as a net for a back portion of a seat and a net for a cushion portion. And
With a width capable of cutting out the back portion net on one side and the cushion portion net on the other side with respect to the first cutting portion in the center in the width direction,
Since the first cutting part and the side edge part of a predetermined width along each side line are subject to terminal processing by vibration welding, the compression ratio in the thickness direction of the first cutting part and each side edge part is different from that of the other part. It is characterized by knitting so as to be relatively higher than the compressibility in the thickness direction of the part.
  The manufacturing method of the processing net base of the present invention according to claim 11 is the manufacturing method of the processing net base according to claim 10, wherein the net for the back portion on one side with respect to the first cutting part and The other cushion net is a set of sheet nets, a pair of adjacent sheet nets is a second cut portion, and the second cut portion is a terminal processing target by vibration welding. The knitting is performed such that the compressibility in the thickness direction is relatively higher than the compressibility in the thickness direction of other portions.
  The manufacturing method of the processing net ground of this invention of Claim 12 is a manufacturing net ground manufacturing method of any one of Claims 9-11, Comprising: The said compression rate is made into the said terminal process object. It adjusts by knitting so that the density of the net structure in a part and the density of the net structure in another part may change.
  The manufacturing method of the processing net base of the present invention according to claim 13 is the manufacturing method of the processing net base according to claim 12, wherein the density of the net organization in the part to be processed by the terminal and in other parts The density of the net structure is the mesh shape of the surface mesh layer, the mesh size of the surface mesh layer, the mesh shape of the back mesh layer, the mesh size of the back mesh layer, the pile arrangement density, and between the front mesh layer and the back mesh layer. Any one element of the pile length and the pile thickness or any two or more elements are adjusted by being knitted so as to change.
  The manufacturing method of the processing net place of this invention of Claim 14 is a manufacturing method of the processing net base of any one of Claims 9-13, Comprising: The said compression rate is made into the said terminal process object. In at least one or more of the fibers constituting the surface mesh layer, the back surface mesh layer, and the pile in the part to be formed and the other part, it is characterized by adjusting by changing the material or type of the fiber and knitting To do.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. 1-3 is a figure which shows a part of the net 10 for a process concerning this embodiment, First, the basic structure of this net 10 for a process is demonstrated based on these figures. As shown in FIG. 1, the processing net base 10 includes a three-dimensional truss having a front surface mesh layer 11, a rear surface mesh layer 12, and a number of piles 13 that connect the front surface mesh layer 11 and the rear surface mesh layer 12. It consists of a structure (three-dimensional structure).
[0017]
For example, as shown in FIG. 2, the surface mesh layer 11 is formed in a structure having a honeycomb-shaped (hexagonal) mesh from a yarn obtained by twisting single fibers. For example, as shown in FIG. 3, the back surface mesh layer 12 is formed by knitting a yarn obtained by twisting a single fiber, and has a mesh (fineness) smaller than the honeycomb mesh of the surface mesh layer 11. Is formed. The pile 13 is formed of a single fiber or a thread, and is knitted between the front surface mesh layer 11 and the back surface mesh layer 12 so that the front surface mesh layer 11 and the back surface mesh layer 12 maintain a predetermined distance. A predetermined rigidity is imparted to the processing net 10 which is a three-dimensional mesh knit.
[0018]
Here, in the claims 6 to 7 and other descriptions in the present specification, when the term “fiber” is simply used, not only single fibers (monofilaments) and yarns (multifilaments) but also spun yarns, etc. Including meaning.
[0019]
In the present embodiment, the layer having a honeycomb-shaped mesh is used as the front surface (for example, the surface that comes into contact with the human body when used as a cushion portion of an automobile seat). The layer can also be used as a surface. Further, as shown in Table 1 to be described later, it is of course possible to adopt a mesh shape other than a honeycomb shape or a fine mesh as the mesh layer structure.
[0020]
As the fiber material constituting the surface mesh layer 11, the back mesh layer 12, or the pile 13, a thermoplastic resin is preferable. For example, thermoplastic polyester resins represented by polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), polyamide resins represented by nylon 6 and nylon 66, and polyolefin resins represented by polyethylene and polypropylene Alternatively, a resin in which two or more of these resins are mixed can be used.
[0021]
The thickness of the fibers constituting the surface mesh layer 11, the back mesh layer 12 or the pile 13 is arbitrary, and the preferred range varies depending on the net product to be processed. In the case of processing as a cushion part, it is 380d or more, preferably 600d or more. As a result, the load of the seated person can be supported by the deformation of the meshes constituting the mesh layers 11 and 12 and the pile 13 falling, and a flexible structure in which no stress concentration occurs can be obtained.
[0022]
FIG. 4 is a plan view showing a long processing net base 10 in the form of a processing raw material for the net product. As described above, the processing net base 10 is actually wound in a roll shape and provided as a roll. Further, the processing net 10 is processed as an automobile seat, and by cutting from the center in the width direction of FIG. 4, the back net 10a is provided on one side and the cushion net is provided on the other side. Each of the nets 10b can be cut out.
[0023]
In FIG. 4, 20 to 22 indicate portions where the compressibility in the thickness direction is relatively high, and 23 and 24 indicate portions where the compressibility in the thickness direction is relatively low. In other words, the side edge portions 20 and 21 having a predetermined width along the side lines 20a and 21a of the long processing net base 10 are positioned in the middle of the side lines 20a and 21a, and are parallel to these lines. Each of the compression ratios with the first cutting part 22 having a predetermined width is formed to be higher than the compression ratios of the other parts 23 and 24 sandwiched therebetween. Each of the side edge parts 20 and 21 and the first cutting part 22 is a part to be variously processed such as cutting and terminal processing when processing into a net product, and relative compression ratios in the thickness direction of the part are relative to each other. By setting a higher value, it becomes easier to perform these processes.
[0024]
Here, the compression rate is measured by a test method based on JASO standard M404-84 “Compression rate and compression modulus”. Specifically, the initial load 3.5 g / cm in the thickness direction is respectively applied to three samples cut into 50 mm × 50 mm.²Measure the thickness when pressurized for 30 seconds at (0.343 kPa), then 200 g / cm²Measure the thickness when left for 10 minutes under a pressure of (19.6 kPa). Next, after removing the load for 10 minutes, it is again 3.5 g / cm.²Measure the thickness when pressurized for 30 seconds at (0.343 kPa). And a compression rate and a compression elastic modulus are calculated by following Formula, and each is represented by the average value of 3 sheets.
[Expression 1]

[Expression 2]

Where t₀Is 3.5 g / cm²Thickness (mm) when pressurized at (0.343 kPa), t₁Is 200 g / cm²Thickness (mm) when pressed at (19.6 kPa), t ′₀Is again 3.5 g / cm²It is the thickness (mm) when pressurized at (0.343 kPa).
[0025]
It is preferable that the difference between the compression ratios of the side edge portions 20 and 21 and the first cutting portion 22 and the other portions 23 and 24 is 5% or more. By setting the compression ratios of the side edge portions 20 and 21 and the first cutting portion 22 to be 5% or more higher than the other portions 23 and 24, for example, in the cutting step, these portions are so-called notched. Therefore, it is easy to cut regardless of the type of cutting method, and in the terminal processing step, it becomes easy to perform vibration welding work to increase the rigidity by reducing the thickness between the front surface mesh layer 11 and the back surface mesh layer 12. . The difference in compression rate is more preferably 10% or more.
[0026]
However, for example, if the compression ratios of the side edge portions 20 and 21 and the first cutting portion 22 to be processed are set too high and the rigidity is extremely low, the vibration welding operation in the terminal processing step is performed. Therefore, the difference in compression rate is more preferably in the range of 10 to 70%.
[0027]
Means for providing a difference in the compressibility in the thickness direction between the side edge portions 20 and 21 to be processed and the first cutting portion 22 and the other portions 23 and 24 is arbitrary. Can be mentioned.
[0028]
First, means for changing the density of the net structure, that is, the density of the net structure of the side edge parts 20 and 21 and the first cutting part 22 to be processed is set as the density of the net structure related to the other parts 23 and 24. Rather than a means of roughening.
[0029]
Specific means for changing the density of the net structure include the mesh shape of the surface mesh layer 11, the mesh size of the surface mesh layer 11, the mesh shape of the back mesh layer 12, the mesh size of the back mesh layer 12, and the arrangement of the piles 13 One of the elements of the density, the length of the pile 13 between the front mesh layer 11 and the back mesh layer 12 (the thickness of the pile layer), and the thickness of the pile 13 or any two or more elements Means for adjusting by combination.
[0030]
That is, when the processing net base 10 is knitted (or woven), if the stage of forming the side edge portions 20 and 21 and the first cutting portion 22 to be processed is reached, any of the above elements For example, the mesh size of the front surface mesh layer 11 or the back surface mesh layer 12 is increased, the mesh shape is changed from fine to honeycomb, or the weaving (weaving) intervals of the piles 13 are widened, and the unit length Reduce the number of braids (weaving) per unit.
[0031]
More specifically, for example, when the net 10 for processing having the three-dimensional structure shown in FIG. 4 is manufactured by adjusting the number of the piles 13 knitted, the pile built in the microcomputer built in the knitting machine This can be done by setting various conditions such as a position where the number of braids is reduced and the number of braids. For example, in the case of knitting the processing net fabric 10 having a width of 970 mm, the number of piles 13 knitted in the range of 30 mm excluding the gripping allowance 20b of the heat setting jig of several mm from the one side line 20a. One side edge portion 20 is formed by reducing the number of piles, and then the number of piles 13 is increased to form another portion 23 constituting the back portion net 10a. The first cutting portion 22 is formed by reducing the number of piles 13 again. Further, after forming the other portion 24 constituting the cushion net 10b by increasing the number of braids of the pile 13, the number of braids of the pile 13 is reduced within a range of 30 mm inward from the other side line 21a. (However, excluding the gripping allowance 21b of the heat setting jig), the other side edge portion 21 is formed.
[0032]
The heat set means that after knitting, the gripping allowances 20b, 21b are held by a jig (not shown) and heated while being pulled to correct the knitting, and the processing net 10 Usually, after heat setting, it is wound on a roll and shipped. However, according to the present embodiment, there are portions such as the side edge portions 20 and 21 and the first cutting portion 22 that have a relatively high compression ratio by roughening the density of the net structure. For this reason, the degree of warping due to knitting is less than that of the conventional case where the compression ratio is uniform (the density of the net structure is uniform). Therefore, it is easy to perform heat setting work, and it takes a short time.
[0033]
In addition to the above, the means for partially changing the compressibility in the thickness direction of the processing net base 10 is at least one of the fibers constituting the surface mesh layer 11, the back mesh layer 12, and the pile 13. In the above, means for changing the material of the fiber is mentioned. For example, when the side edge portions 20 and 21 and the first cutting portion 22 are formed by using polyester or polypropylene fiber that can exhibit high rigidity in the other portions 23 and 24 as the pile 13, Manufactured using nylon, PBT fiber or the like having lower rigidity.
[0034]
Moreover, the said compression rate can also be adjusted by changing the kind of fiber in at least 1 or more in each fiber which comprises the surface mesh layer 11, the back surface mesh layer 12, and the pile 13. FIG. The types of fibers mentioned here include single fibers (monofilaments), yarns (multifilaments), and spun yarns. For example, if the material and thickness (outer diameter) are the same, monofilaments are more suitable than multifilaments. Has high rigidity. Therefore, for example, by using monofilaments in the other parts 23 and 24 as the pile 13 and using multifilaments of the same material and the same thickness in the side edge parts 20 and 21 and the first cutting part 22, The compression rate in the parts 20 to 22 can be relatively increased.
[0035]
Of course, it is possible to appropriately combine two or more of the above-mentioned means when changing the compression rate. For example, while using multifilaments at the side edge portions 20 and 21 and the first cutting portion 22, The thickness of the monofilament constituting the pile 13 knitted in the other portions 23 and 24, the use of a material with weak rigidity, and the means for roughening the density of the net structure Any one or more elements can be appropriately combined.
[0036]
Table 1 shows that the other parts 23 and 24 can exhibit characteristics suitable as a back part or a cushion part of an automobile seat, and can exhibit easy-to-process characteristics at the side edge parts 20 and 21 and the first cutting part 22. The various characteristics of the network site 10 are illustrated. In addition, what was shown in Table 1 adjusted the compression rate by adjusting the arrangement | positioning number per unit length of the pile 13 altogether.
[0037]
[Table 1]

[0038]
In Table 1, “d” represents denier, 1d is a unit of thickness when 1 gram of fiber is pulled by 9,000 m, for example, 220d is 9,000 / 220 = 40. It is a fiber having a thickness when pulled by 9 m. "F" represents a filament and is a unit indicating the number of single fibers. For example, 70f means that one yarn is composed of 70 single fibers. The tensile strength “kg / 5 cm” is the strength when a 5 cm wide material is pulled. “Parallel” of the pile structure means a state in which the piles 13 connecting the front surface mesh layer 11 and the back surface mesh layer 12 do not intersect when viewed from the side, and “cross” indicates a state where they intersect when viewed from the side. Say.
[0039]
In addition, as a way of arranging the pile 13 (pile structure), more specifically, for example, as illustrated in a state viewed from the side of the pile 13 that connects the front surface mesh layer 11 and the back surface mesh layer 12, for example, FIG. The types are classified as shown in FIG. (A), (b) is a straight type in which a pile 13 is disposed between each yarn constituting the front surface mesh layer 11 and each yarn constituting the back surface mesh layer 12 opposed thereto, Of these, (a) is a figure of 8 and knitted straight, and (b) is a simple knitted piece. (C) to (e) are cross types in which the piles 13 are knitted so as to cross each other between the adjacent yarns of the front surface mesh layer 11 and the adjacent yarns of the back surface mesh layer 12. Among them, (c) is crossed in a shape of figure 8, (d) is knitted into a simple cross, and (e) is crossed (double cross) two by two.
[0040]
Next, the process of processing a vehicle seat using the above-described processing net base 10 having a three-dimensional structure will be described.
First, as shown in FIG. 4, the processing net base 10 that is a roll opposite is pulled out and cut along the width direction with an arbitrary length that is easy to handle. Next, as shown in FIG. 5, along the width direction, the back portion net 10 a and the cushion portion net 10 b are cut into a set of sheet nets 10 c in a state of being integrated.
[0041]
Next, as shown in FIG. 6, a plurality of cut sheet nets 10c are stacked and placed on an arbitrary cutting machine, for example, a water jet cutter processing table. And this cutter is started and it cuts along the scheduled cutting lines 22a and 22b of the 1st cutting site | part 22 with a high pressure water. At this time, according to the present embodiment, the compression ratio of the first cutting part 22 is set higher than that of the other parts 23 and 24, and the processing net base 10 has a three-dimensional structure. Therefore, the obstacle caused by the elastic force that impairs the cutting property is reduced. That is, in the conventional one, the other portions 23 and 24 and the first cutting portion 22 have the same compression rate, and the compression rate necessary for exhibiting characteristics as a cushion portion, a back portion, and the like. A relatively low compression rate and a high compression modulus (elastic modulus) are set. For this reason, when cutting a plurality of sheets, the elastic force becomes resistance, the cutting line is bent, and when cutting with a water jet type cutter that supplies high-pressure water from below, the upper part is overlapped. However, according to the present embodiment, since the compression ratio of the first cutting portion 22 is high, the same function as when a notch is formed in advance is achieved, and a plurality of layers are stacked. Even in such a state, it can be cut accurately from the planned position with almost no displacement.
[0042]
As is clear from Table 1, the compressibility and the elastic modulus are not necessarily in an inversely proportional relationship, and sometimes the compressibility is high and the elastic modulus is high, or vice versa. However, in any case, if the compressibility is relatively high, cutting and vibration welding can be easily performed even if the elastic modulus is not so low.
[0043]
Next, a plurality of nets 10a and 10b separated from the first cutting part 22 for the back part and the cushion part are overlapped by the back part nets 10a and the cushion part nets 10b, respectively. Cut along the cutting lines 20c and 21c indicated by broken lines at the edge portions 20 and 21 (see FIGS. 4 to 6). Also in this case, since the compression ratios of the side edge portions 20 and 21 are set as described above, the cutting can be easily and accurately performed as in the case of cutting along the first cutting portion 22.
[0044]
When the back portion net 10a and the cushion portion net 10b are cut out in this way, the details are further cut into desired shapes as shown in the first step of FIG.
[0045]
In the back portion net 10a, the washer 61 used when connecting to the seat frame in the second step is attached to both sides by sewing, and the cosmetic trim 63 is attached to the terminal by sewing in the third step. . The cushion part net 10b is further cut at an extra terminal in the second step, and a trim 64 is attached to the terminal by sewing in the third step.
[0046]
At this time, according to the present embodiment, when the trims 63 and 64 for makeup are provided on the side edge portions 20 and 21 and the like having a relatively high compression rate, for example, the density of the net tissue is low. Since it is rough, it is easy to sew and it is possible to prevent the needle from being broken during sewing.
[0047]
On the other hand, similarly to the back part net 10a and the cushion part net 10b, a base net 30 cut separately from the net-like processed ground 10 is prepared (first step in FIG. 7). This base net 30 is also formed so that the compressibility in the thickness direction of the part to be processed is higher than the compressibility in the thickness direction of other parts. Then, in the second step, the side edge portions 31 and 32 formed so as to increase the compression ratio are folded inward and vibration welded, and in the third step, the reinforcing belt 65 is vibration welded to an appropriate portion. Install by.
[0048]
As described above, when the processing of the back portion net 10a, the cushion portion net 10b, and the base net 30 is completed, these are assembled in the fourth step. In assembling, the side edge portions 20 and 21 or the first cutting portion 22 of the back portion net 10a or the cushion portion net 10b are made to have a high compression ratio in the base net 30 as shown in FIG. The formed portion 30a is fixed and integrated by vibration welding. At this time, a synthetic resin plate 40 is disposed between the vibration welding jigs 50 and 50, and the plate 40 is also vibration welded together.
[0049]
In the vibration welding, a strong bonding force is obtained, and the surface mesh layer 11, the back mesh layer 12 and the pile 13 are welded to each other in the portion where the vibration welding is performed, and the side edge portions 20, 21 and the first cutting are performed. The front surface mesh layer 11 and the back surface mesh layer 12 forming the region 22 are fixed and hardened in the proximity of each other. As a result, the portion subjected to the vibration welding process (terminal process) in this way can be locked to the seat frame by screwing or hooking. Since the compressibility in the thickness direction of the side edge parts 20 and 21 and the first cutting part 22 to be welded is higher than that of the other parts 23 and 24, the vibration welding process for the base net 30 is performed directly after the cutting process. Can do.
[0050]
On the other hand, when the conventional processing net base is used, the compression ratio of the part to be subjected to the vibration welding process is the same as that of the other part. Therefore, after the cutting process, the base net 30 as in the present embodiment. Both were not easily welded even when directly subjected to vibration welding treatment. Therefore, conventionally, in the case of the back net 10a and the cushion net 10b, after cutting, for example, between the first step and the second step in FIG. For example, after attaching the reinforcing belt 65 in the third step, a processing step is required in which the parts to be subjected to the vibration welding process at the time of assembly are individually vibration welded to be in a semi-collapsed state in advance. However, according to the present embodiment, such a semi-smashing process can be eliminated, and the manufacturing process for manufacturing the net product can be simplified and the manufacturing cost can be reduced. The vibration welding process also reduces the mechanical properties of the fiber itself by heat, but the degree of deterioration of the mechanical properties of the fiber itself can be reduced by reducing the number of vibration welding treatment steps.
[0051]
Moreover, according to this embodiment, since the compression rate of the site | part used as a vibration welding process is comparatively high, since vibration welding is performed reliably, some piles 13 are not from vibration welding but from an end surface. Jumping out can also be prevented.
[0052]
Note that the terminal treatment by vibration welding is not limited to the above-described fourth step in FIG. 7, and the side edge portion 20 that is the terminal portion is used to fix the net to the seat frame or the like by screwing or hooking. In order to increase the rigidity of the first cutting portion 22 or the first cutting portion 22, the predetermined portions of the terminal portions such as the back portion net 10 a or the cushion portion net 10 b may be individually vibration welded. For example, the surface mesh layer 11, the back mesh layer 12, and the pile 13 corresponding to the terminal portion are welded to each other, and the surface mesh layer 11 and the back mesh layer 12 forming the side edge portions 20, 21 are combined. There are cases in which a fixed hardness is secured by securing them close to each other, or a plate made of synthetic resin (see FIG. 8) is further fixed by vibration welding after such means are applied. Even when such terminal processing is performed, according to the present embodiment, since the compression rate of the part to be processed is set high, it can be performed more easily than in the past.
[0053]
FIG. 9 is a plan view showing a processing net base 10 according to another embodiment of the present invention. In the case of the processing net 10, the back net 10a and the cushion net 10b are integrated into a pair of seat nets 10c (see FIG. 5) in a state of being integrated along the width direction. A portion to be cut is a second cutting portion 25, and a portion corresponding to the second cutting portion 25 is also formed to have a predetermined width and a compressibility in the thickness direction higher than the other portions 23 and 24.
[0054]
Thereby, the operation | work cut | judged along the predetermined cutting line of the 2nd cutting site | part 25 can be easily performed similarly to the case where it cut | disconnects along the said 1st cutting site | part 22, and a cutting process precision can be raised. . Moreover, the workability of the vibration welding process (terminal process) in the second cutting part 25 can also be improved similarly to the first cutting part 22 of the above embodiment.
[0055]
Note that the processing net base 10 of the present invention is formed so that the compressibility in the thickness direction at the site to be processed such as cutting or vibration welding is higher than that of the other sites 23 and 24. Of course, the part to be processed is not limited to the above-described embodiments. Since the site to be processed differs depending on the target net product, the site for relatively increasing the compression rate may be formed accordingly.
[0056]
Moreover, in the above description, the case where it is processed into a car seat is described as an example, but a wheelchair seat, a furniture chair used for a learning desk or an office desk, a seat seat in a movie theater, etc. It can also be applied to.
[0057]
【The invention's effect】
As described above, according to the processing net base of the present invention, the compressibility in the thickness direction at the part to be processed such as cutting and vibration welding is relatively high compared to other parts. Is formed. Therefore, although it has a three-dimensional structure, it is excellent in workability when processing into a net product, these processing steps can be simplified, and the manufacturing cost of the net product can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a part of a processing net according to an embodiment of the present invention.
2 is an enlarged view showing a surface mesh layer of the processing net shown in FIG. 1. FIG.
3 is an enlarged view showing a back surface mesh layer of the processing net shown in FIG. 1. FIG.
FIG. 4 is a plan view showing a long processing net according to the embodiment.
FIG. 5 is a plan view showing a set of sheet nets cut out from a processing net base.
FIG. 6 is a diagram for explaining a process of cutting a plurality of sheet nets by stacking them.
FIG. 7 is a diagram for explaining a process of manufacturing a car seat as a net product using the cut back net and the cushion net.
FIG. 8 is a diagram for explaining a vibration welding process;
FIG. 9 is a plan view showing a long processing net base according to another embodiment.
FIG. 10 is a diagram showing types of pile structures.
[Explanation of symbols]
10 Net site for processing
10a Net for back part
10b Net for cushion part
10c Net for sheet
11 Surface mesh layer
12 Back mesh layer
13 Pile
20, 21 Side edge part
22 First cutting part
23,24 Other parts
25 Second cutting part
30 base net
40 plates

Claims (14)

A surface mesh layer and a back surface mesh layer are connected by a number of piles, and is a processing net base of a three-dimensional structure used as a raw material for processing an arbitrary net product,
The following formula at a part to be subjected to cutting or terminal processing in each processing step of the arbitrary net product :
Compression rate (%) = {(t ₀ −t ₁ ) / t ₀ } × 100
(However, t ₀ is the thickness (mm) when pressurized at 3.5 g / cm ² (0.343 kPa), and t ₁ is 200 g / cm ² (19.6 kPa)). (Pressing thickness (mm))
The processing net is formed so that the compressibility in the thickness direction indicated by is relatively higher than the compressibility in the thickness direction of other parts. It is a processing net according to claim 1, and is used as a raw material for processing for processing as a net for a back portion of a seat and a net for a cushion portion,
Having a width capable of cutting out the back portion net on one side and the cushion portion net on the other side with respect to the first cut portion in the center in the width direction;
Since the first cutting part and the side edge part of a predetermined width along each side line are subject to terminal processing by vibration welding, the compression ratio in the thickness direction of the first cutting part and each side edge part is different from that of the other part. A processing net , characterized in that it is formed so as to be relatively higher than the compressibility in the thickness direction of the part . 3. The processing net according to claim 2, wherein the back net on one side and the net for cushion on the other side based on the first cutting portion are used as a set of seat nets and adjacent sets. Between the sheet nets is a second cutting part, and this second cutting part is a terminal treatment target by vibration welding. Therefore, the compression ratio in the thickness direction is the compression ratio in the thickness direction of other parts. A processing net formed so as to be relatively high in comparison . The processing net according to any one of claims 1 to 3, wherein a difference in compressibility in a thickness direction between the part to be processed by the terminal and another part is 5% or more. Net site for processing. 5. The processing net according to claim 4, wherein a difference in compressibility in a thickness direction between the part to be processed at the terminal and another part is in a range of 10 to 70% . Net place. The processing net according to any one of claims 1 to 5, wherein the compression ratio is adjusted by the density of the net structure . The processing net according to claim 6 , wherein the density of the net structure is a mesh shape of a surface mesh layer, a mesh size of a surface mesh layer, a mesh shape of a back mesh layer, a mesh size of a back mesh layer, It is adjusted by any one of the arrangement density, the pile length between the front mesh layer and the back mesh layer, and the pile thickness, or a combination of any two or more elements. A net for processing characterized by The processing net according to any one of claims 1 to 7, wherein the compressibility is at least one of the fibers constituting the surface mesh layer, the back mesh layer, and the pile. A net for processing characterized by being adjusted by changing the material or type of fiber . A surface mesh layer and a back surface mesh layer are connected by a large number of piles, and a method for producing a three-dimensional processing net base used as a raw material for processing an arbitrary net product,
The following formula at a part to be subjected to cutting or terminal processing in each processing step of the arbitrary net product:
Compression rate (%) = {(t ₀ −t ₁ ) / t ₀ } × 100
(However, t ₀ is the thickness (mm) when pressurized at 3.5 g / cm ² (0.343 kPa), and t ₁ is 200 g / cm ² (19.6 kPa)). (Pressing thickness (mm))
A method for producing a processing net base, characterized by knitting so that the compressibility in the thickness direction indicated by is relatively higher than the compressibility in the thickness direction of other parts . A method for manufacturing a processing net according to claim 9, wherein the processing net is used as a raw material for processing to process as a back portion net and a cushion portion net of a seat,
With a width capable of cutting out the back portion net on one side and the cushion portion net on the other side with respect to the first cutting portion in the center in the width direction,
Since the first cutting part and the side edge part of a predetermined width along each side line are subject to terminal processing by vibration welding, the compression ratio in the thickness direction of the first cutting part and each side edge part is different from the other A method for manufacturing a processing net, characterized by knitting so as to be relatively higher than a compressibility in a thickness direction of a part . 11. The method for producing a processing net according to claim 10, wherein the back net on one side and the net for the cushion portion on the other side based on the first cutting part are used as a set of sheet nets and adjacent to each other. Since the pair of sheet nets to be used as the second cutting part and this second cutting part is a terminal treatment target by vibration welding, the compression ratio in the thickness direction is the compression in the thickness direction of other parts. A method of manufacturing a net for processing that is knitted so as to be relatively higher than the rate.  It is a manufacturing method of the net base for a process of any one of Claims 9-11, Comprising: The said compression rate WHEREIN: The density of the net organization in the site | part used as the said terminal process target, and the density of the net organization in another site | part A method of manufacturing a processing net that is adjusted by knitting to change. 13. The method for producing a processing net according to claim 12, wherein the density of the net structure in the part to be processed by the terminal and the density of the net structure in the other part are determined according to the mesh shape of the surface mesh layer and the surface mesh layer. One of the mesh size, the mesh shape of the back mesh layer, the mesh size of the back mesh layer, the pile arrangement density, the pile length between the front mesh layer and the back mesh layer, and the pile thickness A method for producing a processing net, characterized by adjusting an element or any two or more elements by knitting to change. It is a manufacturing method of the net place for processing of any one of Claims 9-13, Comprising: The said compression rate is a surface mesh layer, a back surface mesh layer, and a pile in the site | part used as the said terminal processing object, and another site | part. The manufacturing method of the processing net ground which adjusts by knitting by changing the material or kind of fiber in any at least 1 or more among each fiber which comprises.

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