JP4343348B2 - Terminal processing method for net materials - Google Patents

Description

【００２４】
表１において、「ｄ」はデニールを表し、１ｄは１グラムの糸を９，０００ｍ引っ張ったときの太さの単位であり、例えば、２２０ｄは１グラムの糸を９，０００／２１０＝４２．９ｍ引っ張ったときの太さの糸である。「ｆ」はフィラメントを表し、糸が何本の細い糸で構成されているかを示す単位で、例えば、７０ｆは７０本の細い糸で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。
【００２５】
次に、図４及び図５に基づき、第１の実施形態にかかる端末部処理方法について説明する。まず、ネット材１０の端縁１５を内側に向かって折り返し、その折り返し面１６とそれに対向する対向面１７とを振動溶着手段によって固着したものである。固着部位１８は、折り曲げ部１９よりも内方に所定の間隔をおいた位置となっている。このように位置で固着することにより、図４及び図５に示したように、ネット材１０の外周囲に沿って膨らみ２０が形成され、端末部２１の見栄えがよくなる。なお、端末部２１とは、固着部位１８から折り曲げ部１９までの所定の幅の範囲をいう。
【００２６】
端末部２１を構成する固着部位１８は、折り返し面１６とその対向面１７とが振動溶着によって固着された部位であるため、当該部位におけるパイル１３同士、表面メッシュ層１１とパイル１３、裏面メッシュ層１２とパイル１３、あるいは表面メッシュ層１１と裏面メッシュ層１２は相互に接合されて厚みが薄くなっている。これにより、この固着部位１８は、ほぼ板状形態となって空隙が小さくなってクッション性がほとんどなくなり、剛性が高くなっている。従って、この固着部位１８を含んだ端末部２１は、伸びが抑えられることにより、フレーム等への組み付け性が向上する。また、端縁１５を内側に向かって折り返して固着するというきわめて簡素な構成であるため、従来の縫製による端末部処理方法と比較して作業時間が短く、作業も容易である。
【００２７】
ここで、本実施形態において振動溶着手段を採用したのは、ネット材１０が、上記のように、表面メッシュ層１１、裏面メッシュ層１２及びパイル１３を有する複雑な三次元構造であり、このような複雑な構造体を、確実に溶着し、高密度の薄型に加工するのに適するからである。なお、表面メッシュ層１１、裏面メッシュ層１２及びパイル１３は、材料が同じであればその溶融点はいずれも同じであるが、それらを構成する繊維数にも関係する。例えば、パイル１３がモノフィラメントで表面メッシュ層１１及び裏面メッシュ層１２がマルチフィラメントの場合にはモノフィラメントからなるパイル１３が振動溶着によって溶融することになる。
【００２８】
次に、図６に基づき本発明の第２の実施形態について説明する。本実施形態においても、まず、上記第１の実施形態と同様、端縁１５を内側に向かって折り返し、折り返し面１６とその対向面１７同士を振動溶着によって固定する。また、固着部位１８も、上記第１の実施形態と同様、折り曲げ部１９よりも内方に所定の間隔をおいた位置とし、これにより、ネット材１０の外周囲に沿って膨らみ２０を備えた端末部２１を形成する。
【００２９】
端末部２１を形成したならば、カバー部材３０を装着するが、図６に示したように、該カバー部材３０が容易に外れないよう、膨らみ２０の形状を保持する芯材２０ａを、折り返し面１６とその対向面１７との間に配置することが好ましい。なお、芯材２０ａを配置するタイミングは任意であり、端縁１５を内側に向かって折り返す際に芯材２０ａを配置して行ってもよいし、端縁１５を折り返した後、例えば、振動溶着した後に挿入するようにしてもよい。このカバー部材３０は、中空で、断面略半楕円状のパイプ状に形成されているが、一側端面にはその長手方向に沿ってスリット３１が形成されている。装着の際には、スリット３１を挟んで対向するスリット形成端３１ａ，３１ｂ間に固着部位１８が位置するようにスライドさせて挟持し、中空部３２内に端末部２１の一部である膨らみ２０を収容して装着する。この際、本実施形態によれば、スリット形成端３１ａ、３１ｂが、振動溶着された固着部位１８の表面に接することになるが、この固着微１８の表面は振動溶着により滑らかになっており、振動溶着する前と比較して摩擦係数が低くなっている。従って、カバー部材３０をスライド挿入させる作業はきわめて容易である。なお、このようなカバー部材３０を装着した場合には、該カバー部材３０によって膨らみ２０を隠すことができるため、美観がさらに向上する。
【００３０】
図７は、本発明の第３の実施形態を説明するための図である。本実施形態においては、まず、端末部２１に相当する端縁１５から内側に向かって所定幅の部位を、振動溶着手段によって、パイル１３同士、表面メッシュ層１１とパイル１３、裏面メッシュ層１２とパイル１３、あるいは表面メッシュ層１１と裏面メッシュ層１２を相互に接合して厚みが薄くなるように加工する。パイル１３同士等が接合されて厚みが薄くなることによりネット組織の密度が他の部位よりも密になり、剛性が高くなり、端末部２１の伸びがそれよりも内側の部位と比較して抑えられることになる。
【００３１】
次に、本実施形態においては、端末部２１に、表皮材２３を積層し、振動溶着手段によって固着する。これにより、表皮材２３が固着された部位の剛性がさらに高くなる。なお、剛性をより高めるため、及び形状のバランスを保つためには、図７に示したように、該表皮材２３は、表面メッシュ層１１側と裏面メッシュ層１２側の両面に固着することが好ましい。また、表皮材２３としては不織布等を用いることができ、また上記した素材からなるネット材１０に対して振動溶着可能な材料であればよいが、特に、ネット材１０と同質の材料からなるものを用いることが好ましい。
【００３２】
また、ここでいう表皮材２３は、端末部２１に積層することによって該端末部２１を覆う化粧部材としても機能する。かかる機能を有効に発揮させるためには、端末部２１に１枚の表皮材２３を固着するだけでなく、表皮材２３として端末部２１よりも幅の大きなものを使用し、表皮材２３の一方の端縁２３ａをネット材１０の端縁１５にほぼ沿わせて両者を振動溶着した後、端末部２１よりも内側にはみ出した部分を外側に折り返し、さらに各表皮材２３の折り返し部２３ｂ同士を振動溶着することが好ましい。これにより、端末部２１よりも内側の部位と表皮材２３との境界において、表皮材２３のカットラインではなく折り曲げ部２３ｃが表れることになるため、見栄えが向上する。また、表皮材２３が折り返されているため、該表皮材２３によるクッション性も向上し、表皮材２３に接した際の感触がより良好となる。
【００３３】
図８は、本発明の第４の実施形態を示したものであり、上記第２の実施形態と同様に、美観を向上させる化粧部材としての役割を果たすカバー部材３０を用いた端末部処理方法である。
【００３４】
本実施形態においては、まず、ネット材１０の端縁１５から内側に向かって所定間隔おいた部位を、振動溶着手段によって、パイル１３同士、表面メッシュ層１１とパイル１３、裏面メッシュ層１２とパイル１３、あるいは表面メッシュ層１１と裏面メッシュ層１２を相互に接合して厚みが薄くなるように加工して、溝状の薄肉部２２を形成する。この薄肉部２２は、パイル１３同士等が接合されて厚みが薄くなることによりネット組織の密度が他の部位よりも密になり、剛性が高くなっており、これにより、該薄肉部２２から端縁１５までの本実施形態の端末部２１の伸びがそれよりも内側の部位と比較して抑えられることになる。
【００３５】
次に、本実施形態においては、薄肉部２２と、この薄肉部２２から端縁１５までの間の部位に、表皮材２３を積層し、振動溶着手段によって固着する。これにより、表皮材２３が固着された部位の剛性がさらに高くなる。なお、剛性をより高めるため、及び形状のバランスを保つためには、図８に示したように、該表皮材２３は、表面メッシュ層１１側と裏面メッシュ層１２側の両面に固着することが好ましい。また、表皮材２３としては上記第３の実施形態と同様に、ネット材１０と同質の材料からなるものを用いることが好ましい。
【００３６】
薄肉部２２を形成すると共に、表皮材２３を固着したならば、次に、カバー部材３０を装着する。このカバー部材３０は、中空の断面略四角形に形成されていると共に、一側端面にスリット３１が形成されており、対向するスリット形成端３１ａ，３１ｂにより薄肉部２２を両面から挟持し、かつ該薄肉部２２から端縁１５までの部位を中空部３２内に収容するようにして装着する。この場合も、スリット形成端３１ａ，３１ｂが当接する薄肉部２２は、振動溶着によりその表面が滑らかになっており、カバー部材３０をスライド挿入するのが容易である。
【００３７】
なお、カバー部材３０を装着するに当たって、上記の表皮材２３は必ずしも必須ではないが、端末部２１の剛性を高め、その伸びを抑制するという観点からは、上記のように表皮材２３を積層して固着することが好ましい。
【００３８】
また、さらに剛性を高めるためには、図９（ａ），（ｂ）に示したように、ネット材１０を形成する際に、この端末部２１に相当する部位について、ネット組織の密度が予め密となるように編んでおくことが好ましい。
【００３９】
端末部２１に相当する部位のネット組織の密度が密となるように編み込む手段としては種々の手段が考えられるが、例えば、パイル１３の表面メッシュ層１１及び裏面メッシュ層１２に対する編み込み間隔を、該端末部２１より内側における編み込み間隔よりも小さくして隣接するパイル１３間の間隔を短くする手段、表面メッシュ層１１及び／又は裏面メッシュ層１２のメッシュの大きさが端末部２１に相当する部位のみ小さくなるように編み込む手段、端末部２１に相当する表面メッシュ層１１、裏面メッシュ層１２及び／又はパイル１３を形成する繊維（モノフィラメント）の太さを太くする手段、端末部２１に相当する表面メッシュ層１１、裏面メッシュ層１２及び／又はパイル１３を糸（多層又は撚り繊維）から形成する手段、又は、これらの手段を適宜に組み合わせて行う手段等が挙げられる。
【００４０】
図１０〜図１４は、本発明の第５の実施形態を説明するための図であり、化粧部材であるカバー部材３０を射出成形により、端末部２１に一体化させて形成した構造である。
【００４１】
具体的には、図１０に示したように、まず、端縁１５から内側に向かって所定幅の部位である端末部２１を上記実施形態と同様に振動溶着により厚みを薄くしてネット組織を密にし、剛性を高める。次に、該端末部２１の表面を振動溶着により表皮材２３で被覆する。表皮材２３で被覆することにより、射出成形の際、端末部２１の間隙に射出圧によって合成樹脂が入り込むことが防止される。また、端末部２１及び表皮材２３の弾性により型のクリアランスのばらつきに伴う合成樹脂の漏れを防止することができる。
【００４２】
次に、この端末部２１を図示しない金型にセットして、射出成形する。この結果、成形されたカバー部材３０は、端末部２１と一体化しているため、上記のように押出成形等により予め成形されたカバー部材３０を端末部２１に装着する場合と比較して外れにくくなる。
【００４３】
なお、このように射出成形により成形されるカバー部材３０をより外れにくくするために、図１１で示したように、表皮材２３として起毛部を有するものを用い、一部の起毛部２３ｄを起毛させた状態で残して振動溶着することが好ましい。また、図１１では、起毛部２３ｄを端末部２１の片面のみに残しているが、図１２〜図１４に示したように、端末部２１の両面に残す構成とすることもできる。すなわち、図１２及び図１３に示したように、まず、端末部２１を振動溶着により薄く加工してネット組織の密度を密にし、この端末部２１に表皮材２３を積層する。次に、この表皮材２３を端末部２１の両面においてその略中央部を除き振動溶着する。これにより、起毛部２３ｄが両面に残った状態で表皮材２３が固着される。そして、図１４に示したように、金型にセットして射出成形によりカバー部材３０を形成すると、起毛部２３ｄが端末部２１の両面に残っているため、より強固に接合することになる。
【００４４】
なお、本発明のネット材の端末部処理方法は上記した実施形態に限定されるものではない。例えば、図６、図８、図９、図１０及び図１４に示したカバー部材３０の形状は、あくまで例示であり、これら以外の形状とすることはもちろん可能である。また、端末部２１を構成する部位について、ネット材１０を編む際に予め当該部位のネット組織が密になるように編み込んでおくことを、上記説明では第４の実施形態においてのみ説明しているが、他の実施形態においてかかる手段を採用して端末部２１の剛性をより高くすることも可能である。
【００４５】
【発明の効果】
本発明の三次元構造のネット材の端末部処理方法は、振動溶着手段を用いて処理する工程を有するため、従来のように縫製作業をする必要がなくなり、端末部の処理作業が容易となる。また、端末部を振動溶着手段により薄く加工してネット組織の密度を密にしたり、振動溶着手段によって表皮材を固着したりする工程を有することにより、端末部の剛性を高め、端末部の不要な伸びを抑えることができる。このため、端末部の伸びによりフレーム等への取り付け性を損なうという問題を解消することができる。また、端末部にカバー部材を装着して処理するに当たっては、カバー部材と接する面が振動溶着によって滑らかになり、振動溶着する前と比較して摩擦係数が低減されるため、カバー部材をスムースに装着できる。
【図面の簡単な説明】
【図１】図１は、本発明の処理対象となるネット材を示す断面図である。
【図２】図２は、図１に示したネット材の表面メッシュ層を示す拡大図である。
【図３】図３は、図１に示したネット材の裏面メッシュ層を示す拡大図である。
【図４】図４は、本発明の第１の実施形態にかかる端末部処理方法を説明するためのネット材の一部を示す斜視図である。
【図５】図５は、本発明の第１の実施形態にかかる端末部処理方法を説明するためのネット材の一部を示す断面図である。
【図６】図６は、本発明の第２の実施形態にかかる端末部処理方法を説明するためのネット材の一部を示す断面図である。
【図７】図７は、本発明の第３の実施形態にかかる端末部処理方法を説明するためのネット材の一部を示す断面図である。
【図８】図８は、本発明の第４の実施形態にかかる端末部処理方法を説明するためのネット材の一部を示す断面図である。
【図９】図９は、本発明の第４の実施形態にかかる端末部処理方法の好ましい態様を示す図であり、（ａ）は端末処理を施す前のネット材の一部を示す断面図であり、（ｂ）は端末処理を施した後のネット材の一部を示す断面図である。
【図１０】図１０は、本発明の第５の実施形態にかかる端末部処理方法を説明するためのネット材の一部を示す断面図である。
【図１１】図１１は、本発明の第５の実施形態にかかる端末部処理方法において表皮材を固着した状態を示すネット材の一部断面図である。
【図１２】図１２は、本発明の第５の実施形態にかかる端末部処理方法において表皮材を固着した状態を示すネット材の一部斜視図である。
【図１３】図１３は、本発明の第５の実施形態にかかる端末部処理方法の好ましい態様を示す図であり、表皮材を固着した状態におけるネット材の一部断面図である。
【図１４】図１４は、本発明の第５の実施形態にかかる端末部処理方法の好ましい態様を示す図であり、カバー部材を形成した状態におけるネット材の一部断面図である。
【符号の説明】
１０ ネット材
１１ 表面メッシュ層
１２ 裏面メッシュ層
１３ パイル
１５ 端縁
１６ 折り返し面
１７ 対向面
１８ 固着部位
２１ 端末部
２２ 薄肉部
２３ 表皮材
３０ カバー部材
３１ スリット[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for processing a terminal portion of a net material having a three-dimensional structure.
[0002]
[Prior art]
Seats with good cushioning properties, such as automotive vehicle seats, are usually provided with a pad material made of urethane or the like after a spring material such as a coil spring or S-type spring is provided on the seat frame. Is covered with vinyl leather or fabric. However, the sheet thus formed has a large overall thickness including the spring material, and also has a weight. In addition, the air permeability is generally not good except for the case where a special mechanism such as a ventilation hole is formed in the pad material. A device employing a special mechanism for ensuring ventilation has a problem of high manufacturing costs.
[0003]
As a sheet for improving the above points, a sheet using a net material in which a front mesh layer and a back mesh layer are connected by a large number of piles to form a truss structure (three-dimensional structure) is known. Since it is a truss structure, it is an elastic structure that is difficult to sag and has excellent dispersion and absorption characteristics of body pressure. Therefore, even if it is thin, a large cushioning property can be exhibited. In addition, since it has a net structure, it has a large number of voids and is excellent in air permeability even if no special mechanism is employed. Because of these advantages, the three-dimensional net material is limited to the above-mentioned vehicle seats, furniture chairs used for study desks and office desks, seat seats in movie theaters, etc. It is applied to other structures such as part tension.
[0004]
[Problems to be solved by the invention]
Although the net material of the three-dimensional structure has the characteristics as described above, it is composed of a front surface mesh layer, a back surface mesh layer, and a pile, so that it is simply cut into a predetermined size for use in the above-described applications. As a result, the yarns and fibers constituting them are easily frayed, are not good in appearance, and are inconvenient to handle. Therefore, conventionally, in order to improve the appearance of the terminal portion and to facilitate handling, the terminal portion is covered with a skin material and both are sewn.
[0005]
However, the sewing work is time consuming and troublesome. In addition, since the sewing is simply performed, the rigidity of the terminal portion is not so changed as compared to the inner portion thereof, and there is a problem that the elongation of the terminal portion impairs the attachment to the frame or the like.
In addition, a cover member that covers the terminal portion may be attached after sewing, but when the cover member is attached, the insertion slit of the cover member is caught by the front mesh layer or the back mesh layer and is difficult to insert. There was also a problem.
[0006]
This invention is made | formed in view of an above-described point, and makes it a subject to provide the terminal part processing method of the net | network material which can make a sewing operation unnecessary. Moreover, this invention makes it a subject to provide the terminal part processing method of the net | network material which can raise the rigidity of a terminal part and can suppress the elongation of a terminal part. Moreover, this invention makes it a subject to provide the terminal part processing method of the net | network material which can improve the mounting | wearing property, when mounting | wearing with a cover member.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides the following methods.
[0008]
1. A method for treating a terminal portion of a net material having a three-dimensional structure , which is made of a thermoplastic resin, has a front surface mesh layer and a back surface mesh layer, and is formed by joining the front surface mesh layer and the back surface mesh layer with a number of piles. Then, the end edge is folded inward, and the folded surface and the facing surface facing the folded surface are fixed by the vibration welding means at a position spaced inward from the bent portion, and then the longitudinal direction. A method for treating the end of a net member, comprising: disposing a hollow cover member having a slit along the slit so as to sandwich the fixing portion between the slit forming ends.
[0009]
2. The terminal processing method for a net material according to claim 1 , wherein, in an arbitrary step from the step of folding the end edge inward to the mounting of the cover member, the folded surface and the facing surface A method for processing a terminal portion of a net material, comprising a step of arranging a core material for shape retention between the core materials.
[0010]
3. A method for treating a terminal portion of a net material having a three-dimensional structure, which is made of a thermoplastic resin , has a front surface mesh layer and a back surface mesh layer, and is formed by joining the front surface mesh layer and the back surface mesh layer with a number of piles. A skin material having a width wider than the width of the terminal portion on at least one side of the terminal portion after the terminal portion is processed by the vibration welding means so that the thickness is reduced to increase the density of the net structure. Are laminated, the edge of the skin material is aligned with the edge of the net material, and vibration welding is performed by vibration welding means in a developed state, and then the portion protruding beyond the vicinity of the edge is folded back to further vibration welding means. A method for treating a terminal portion of a net material, comprising: welding by vibration and fixing the skin material to the terminal portion .
[0011]
4). A method for treating a terminal portion of a net material having a three-dimensional structure , which is made of a thermoplastic resin, has a front surface mesh layer and a back surface mesh layer, and is formed by joining the front surface mesh layer and the back surface mesh layer with a number of piles. In addition, a step of processing a portion spaced from the edge toward the inside by a groove shape so that the thickness is reduced by vibration welding means to increase the density of the net structure, and a slit along the longitudinal direction A method for treating a terminal portion of a net material , comprising: a hollow cover member having a structure in which a portion thinly processed by the above-described process is sandwiched between slit forming ends .
[0012]
5). 5. The net material terminal portion processing method according to 4 above, wherein a portion spaced from the edge toward the inside is processed into a groove shape so that the thickness is reduced by vibration welding means to reduce the density of the net structure. After the step of densifying, the skin material is fixed by vibration welding means to a portion between the portion processed thinly by the step and the edge, and then the cover member is disposed. A method for processing a net material terminal .
[0013]
6). 6. The net material terminal portion processing method according to 4 or 5 , wherein the density of the net structure between the portion processed thinly by the step and the edge is formed denser in advance than the inner portion. terminal portion processing method net member, characterized in that is.
[0014]
7). A method for treating a terminal portion of a net material having a three-dimensional structure , which is made of a thermoplastic resin, has a front surface mesh layer and a back surface mesh layer, and is formed by joining the front surface mesh layer and the back surface mesh layer with a number of piles. there, the terminal portion is a portion of a predetermined width from the edge toward the inside, and as engineering you closely the density of the net stitch was pressurized Engineering so that the thickness becomes thinner by vibration welding means, said terminal portion A step of laminating a skin material on the terminal portion, and fixing the skin material to the terminal portion by vibration welding means, and a step of forming a cover member by injection molding on the skin material fixed by the step. A terminal processing method for a net material characterized by the above.
[0015]
8). 8. The method for treating an end portion of a net material according to claim 7 , wherein the skin material is provided with a raised portion, and the skin material is fixed by vibration welding means while raising some of the raised portions without crushing. A terminal processing method for a net material, comprising:
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail with reference to the drawings.
[0017]
First, based on FIGS. 1-3, the outline | summary of the net material 10 of the three-dimensional structure used as the process target of this invention is demonstrated.
[0018]
As shown in the cross-sectional view of FIG. 1, the net material 10 has a three-dimensional structure having a front surface mesh layer 11, a back surface mesh layer 12, and a large number of piles 13 that connect the front surface mesh layer 11 and the back surface mesh layer 12. The truss structure (three-dimensional structure) is used.
[0019]
For example, as shown in FIG. 2, the surface mesh layer 11 is formed from a twisted yarn obtained by twisting fine yarns into a structure having a honeycomb (hexagonal) mesh, and the back surface mesh layer 12 is shown in FIG. 3. As described above, a twisted yarn obtained by twisting a fine yarn is formed by rubber knitting, and has a structure having a mesh (fineness) smaller than the honeycomb mesh of the surface mesh layer 11. The pile 13 is formed of fibers or threads, and is knitted between the front mesh layer 11 and the back mesh layer 12 so that the front mesh layer 11 and the back mesh layer 12 maintain a predetermined distance. A predetermined rigidity is imparted to the net member 10 which is a three-dimensional mesh knit. Here, the layer having a honeycomb-shaped mesh is used as the surface (for example, the surface that comes into contact with the human body when used as a cushioning material for a seat), but this is used as the back surface and the layer having a small mesh is used as the surface. You can also. 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]
The material constituting the net material 10 is preferably a thermoplastic resin, and can be molded into a fiber shape and can exhibit the strength required when it is made into a woven fabric and used for a predetermined application (such as a sheet material). Good. For example, thermoplastic polyester resins represented by polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyamide resins represented by nylon 6, nylon 66, etc., polyolefin resins represented by polyethylene, polypropylene, etc. Alternatively, a resin in which two or more of these resins are mixed can be used.
[0021]
The thickness of the pile 13 is 380d or more, preferably 600d or more. Thereby, for example, the load of the seated person applied to the net member 10 used as a cushioning member of the seat can be supported by the deformation of the meshes constituting the mesh layers 11 and 12 and the fall of the piles 13, and the stress concentration It can be a flexible structure that does not occur.
[0022]
For reference, Table 1 shows some examples of materials that can be used as the net member 10 and some physical property values thereof.
[0023]
[Table 1]

[0024]
In Table 1, “d” represents denier, 1d is a unit of thickness when a gram of yarn is pulled 9,000 m, for example, 220d is 9,000 / 210 = 42. It is a thread of a thickness when pulled 9m. “F” represents a filament, and is a unit indicating how many thin threads the thread is composed of. For example, 70f means that one thin thread is composed of 70 thin threads. 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.
[0025]
Next, the terminal unit processing method according to the first embodiment will be described with reference to FIGS. 4 and 5. First, the edge 15 of the net member 10 is folded inward, and the folded surface 16 and the facing surface 17 facing the folded surface 16 are fixed by vibration welding means. The fixing portion 18 is located at a predetermined interval inward from the bent portion 19. By fixing in this way, as shown in FIGS. 4 and 5, a bulge 20 is formed along the outer periphery of the net member 10, and the appearance of the terminal portion 21 is improved. The terminal portion 21 refers to a predetermined width range from the fixing portion 18 to the bent portion 19.
[0026]
The fixing portion 18 constituting the terminal portion 21 is a portion where the folded surface 16 and the facing surface 17 are fixed by vibration welding. Therefore, the piles 13 in the corresponding portion, the surface mesh layer 11 and the pile 13, and the back surface mesh layer 12 and the pile 13 or the surface mesh layer 11 and the back surface mesh layer 12 are mutually joined, and thickness is thin. Thereby, this adhering site | part 18 becomes a substantially plate shape, a space | gap becomes small, cushion property is almost lost, and rigidity is high. Therefore, the terminal portion 21 including the fixing portion 18 is restrained from being stretched, so that the assembling property to the frame or the like is improved. Further, since the end edge 15 is folded back and fixed inward, the working time is short and the work is easy as compared with the conventional terminal processing method by sewing.
[0027]
In this embodiment, the vibration welding means is employed in the present embodiment because the net material 10 has a complicated three-dimensional structure having the front mesh layer 11, the back mesh layer 12, and the pile 13 as described above. This is because such a complicated structure is surely welded and is suitable for processing into a high-density thin. The surface mesh layer 11, the back mesh layer 12, and the pile 13 have the same melting point as long as the materials are the same, but are also related to the number of fibers constituting them. For example, when the pile 13 is a monofilament and the front mesh layer 11 and the back mesh layer 12 are multifilaments, the pile 13 made of monofilament is melted by vibration welding.
[0028]
Next, a second embodiment of the present invention will be described with reference to FIG. Also in the present embodiment, first, similarly to the first embodiment, the end edge 15 is folded inward, and the folded surface 16 and the opposed surfaces 17 are fixed by vibration welding. Further, as in the first embodiment, the fixing portion 18 is also positioned at a predetermined interval inward from the bent portion 19, and thereby has a bulge 20 along the outer periphery of the net member 10. The terminal part 21 is formed.
[0029]
Once the terminal portion 21 is formed, the cover member 30 is attached. As shown in FIG. 6, the core member 20a that holds the shape of the bulge 20 is turned back so that the cover member 30 is not easily detached. It is preferable to arrange between 16 and its opposing surface 17. In addition, the timing which arrange | positions the core material 20a is arbitrary, and when the edge 15 is turned inward, you may arrange | position and perform the core material 20a, and after folding the edge 15, for example, vibration welding After that, it may be inserted. The cover member 30 is hollow and is formed in a pipe shape having a substantially semi-elliptical cross section, and a slit 31 is formed along the longitudinal direction on one end face. At the time of mounting, the swell 20 is slid and sandwiched so that the fixing portion 18 is located between the slit forming ends 31 a and 31 b facing each other with the slit 31 therebetween, and the bulge 20 which is a part of the terminal portion 21 in the hollow portion 32. Housing and wearing. At this time, according to the present embodiment, the slit forming ends 31a and 31b come into contact with the surface of the vibration-adhering fixing portion 18, but the surface of the fixing fine 18 is smooth by vibration welding, The coefficient of friction is lower than before vibration welding. Therefore, the operation of slidingly inserting the cover member 30 is very easy. When such a cover member 30 is mounted, the bulge 20 can be hidden by the cover member 30, and the aesthetic appearance is further improved.
[0030]
FIG. 7 is a diagram for explaining a third embodiment of the present invention. In the present embodiment, first, a portion having a predetermined width from the end edge 15 corresponding to the terminal portion 21 toward the inside is formed by vibration welding means between the piles 13, the surface mesh layer 11 and the pile 13, and the back surface mesh layer 12. The pile 13 or the front surface mesh layer 11 and the back surface mesh layer 12 are bonded to each other so as to be thinned. As the piles 13 and the like are joined together and the thickness is reduced, the density of the net structure becomes denser than the other parts, the rigidity is increased, and the extension of the terminal portion 21 is suppressed compared to the inner part. Will be.
[0031]
Next, in the present embodiment, the skin material 23 is laminated on the terminal portion 21 and fixed by vibration welding means. Thereby, the rigidity of the site | part to which the skin material 23 was fixed becomes still higher. In order to further increase the rigidity and to maintain the balance of the shape, as shown in FIG. 7, the skin material 23 may be fixed to both the surface mesh layer 11 side and the back mesh layer 12 side. preferable. Further, as the skin material 23, a non-woven fabric or the like can be used, and any material can be used as long as it can be vibration welded to the net material 10 made of the above-mentioned material. In particular, the material made of the same material as the net material 10 is used. Is preferably used.
[0032]
Moreover, the skin material 23 here also functions as a decorative member that covers the terminal portion 21 by being laminated on the terminal portion 21. In order to effectively exhibit such a function, not only the one skin material 23 is fixed to the terminal portion 21 but also a material having a width wider than that of the terminal portion 21 is used as the skin material 23. The edge 23a of the skin material 23 is substantially aligned with the edge 15 of the net member 10, and both are vibrated and welded. Then, the portion protruding inward from the terminal portion 21 is folded outward, and the folded portions 23b of the respective skin materials 23 are joined together. It is preferable to perform vibration welding. As a result, not the cut line of the skin material 23 but the bent portion 23c appears at the boundary between the portion inside the terminal portion 21 and the skin material 23, so that the appearance is improved. Further, since the skin material 23 is folded back, the cushioning property by the skin material 23 is improved, and the touch when contacting the skin material 23 becomes better.
[0033]
FIG. 8 shows a fourth embodiment of the present invention. Similar to the second embodiment, the terminal portion processing method using the cover member 30 that plays the role of a decorative member that improves the aesthetic appearance. It is.
[0034]
In the present embodiment, first, the portions spaced apart from the edge 15 of the net material 10 toward the inside by a welding means are used for the piles 13, the surface mesh layer 11 and the pile 13, and the back mesh layer 12 and the pile. 13 or the front surface mesh layer 11 and the back surface mesh layer 12 are bonded to each other and processed so as to be thinned to form a groove-shaped thin portion 22. The thin portion 22 is bonded to the piles 13 and the like so that the thickness of the thin portion 22 is reduced, so that the density of the net structure becomes denser and the rigidity is higher than other portions. The extension of the terminal portion 21 of the present embodiment up to the edge 15 is suppressed as compared with the inner portion.
[0035]
Next, in this embodiment, the skin material 23 is laminated | stacked on the thin part 22 and the site | part between this thin part 22 and the end edge 15, and it adheres with a vibration welding means. Thereby, the rigidity of the site | part to which the skin material 23 was fixed becomes still higher. In order to further increase the rigidity and maintain the balance of the shape, as shown in FIG. 8, the skin material 23 may be fixed to both surfaces of the front mesh layer 11 side and the back mesh layer 12 side. preferable. Further, as the skin material 23, it is preferable to use a material made of the same material as the net material 10 as in the third embodiment.
[0036]
Once the thin portion 22 is formed and the skin material 23 is fixed, the cover member 30 is then attached. The cover member 30 has a hollow cross-section having a substantially quadrangular shape, and a slit 31 is formed on one side end surface thereof, and the thin portion 22 is sandwiched from both sides by opposing slit forming ends 31a and 31b. The part from the thin part 22 to the edge 15 is mounted so as to be accommodated in the hollow part 32. Also in this case, the surface of the thin portion 22 with which the slit forming ends 31a and 31b abut is smoothed by vibration welding, and the cover member 30 can be easily inserted by sliding.
[0037]
In attaching the cover member 30, the skin material 23 is not necessarily essential. However, from the viewpoint of increasing the rigidity of the terminal portion 21 and suppressing its elongation, the skin material 23 is laminated as described above. It is preferable to fix them.
[0038]
Further, in order to further increase the rigidity, as shown in FIGS. 9A and 9B, when the net member 10 is formed, the density of the net structure is previously set for the portion corresponding to the terminal portion 21. It is preferable to knit so as to be dense.
[0039]
Various means can be considered as means for knitting so that the density of the net structure of the portion corresponding to the terminal portion 21 is dense. For example, the knitting interval with respect to the front surface mesh layer 11 and the back surface mesh layer 12 of the pile 13 is Means for shortening the interval between adjacent piles 13 by making it smaller than the braiding interval on the inner side of the terminal part 21, only the part where the mesh size of the front mesh layer 11 and / or the back mesh layer 12 corresponds to the terminal part 21 Means for weaving to be small, means for increasing the thickness of the fibers (monofilaments) forming the surface mesh layer 11, the back mesh layer 12 and / or the pile 13 corresponding to the terminal portion 21, and the surface mesh corresponding to the terminal portion 21 Means for forming the layer 11, the back mesh layer 12 and / or the pile 13 from yarns (multilayer or twisted fibers), Means for performing a combination of these measures appropriately, and the like.
[0040]
FIGS. 10-14 is a figure for demonstrating the 5th Embodiment of this invention, and is the structure formed by integrating the cover member 30 which is a decorative member with the terminal part 21 by injection molding.
[0041]
Specifically, as shown in FIG. 10, first, the end portion 15 having a predetermined width toward the inside from the end edge 15 is thinned by vibration welding in the same manner as in the above-described embodiment to form a net structure. Increase density and rigidity. Next, the surface of the terminal portion 21 is covered with the skin material 23 by vibration welding. Covering with the skin material 23 prevents the synthetic resin from entering the gap of the terminal portion 21 due to the injection pressure during injection molding. Moreover, the elasticity of the terminal part 21 and the skin material 23 can prevent the leakage of the synthetic resin due to the variation in the mold clearance.
[0042]
Next, this terminal portion 21 is set in a mold (not shown) and injection molded. As a result, since the molded cover member 30 is integrated with the terminal portion 21, it is less likely to come off as compared with the case where the cover member 30 previously formed by extrusion molding or the like is attached to the terminal portion 21 as described above. Become.
[0043]
In order to make it difficult for the cover member 30 formed by injection molding to be detached as described above, as shown in FIG. 11, a material having a raised portion is used as the skin material 23, and some raised portions 23d are raised. It is preferable that vibration welding is performed while the state is left. Further, in FIG. 11, the raised portions 23 d are left only on one side of the terminal portion 21, but a configuration in which the raised portions 23 d are left on both sides of the terminal portion 21 as shown in FIGS. That is, as shown in FIGS. 12 and 13, first, the terminal portion 21 is thinly processed by vibration welding to increase the density of the net structure, and the skin material 23 is laminated on the terminal portion 21. Next, the skin material 23 is vibration welded on both surfaces of the terminal portion 21 except for its substantially central portion. Thereby, the skin material 23 is fixed in a state where the raised portions 23d remain on both surfaces. And as shown in FIG. 14, when it sets to a metal mold | die and the cover member 30 is formed by injection molding, since the raising part 23d remains on both surfaces of the terminal part 21, it will join more firmly.
[0044]
In addition, the terminal part processing method of the net | network material of this invention is not limited to above-described embodiment. For example, the shape of the cover member 30 shown in FIGS. 6, 8, 9, 10, and 14 is merely an example, and it is of course possible to use shapes other than these. In addition, in the above description, only the fourth embodiment describes that the parts constituting the terminal portion 21 are knitted so that the net structure of the part is dense when the net material 10 is knitted in advance. However, the rigidity of the terminal portion 21 can be further increased by employing such means in other embodiments.
[0045]
【The invention's effect】
Since the method for processing a terminal portion of a net material having a three-dimensional structure according to the present invention includes a step of processing using vibration welding means, it is not necessary to perform a sewing operation as in the conventional case, and the processing operation of the terminal portion is facilitated. . In addition, the terminal part is thinned by vibration welding means to increase the density of the net structure, or the skin material is fixed by vibration welding means, thereby increasing the rigidity of the terminal part and eliminating the need for the terminal part. Can be suppressed. For this reason, the problem that the attachment property to a frame etc. is impaired by extension of a terminal part can be solved. In addition, when the cover member is attached to the terminal portion, the surface in contact with the cover member is smoothed by vibration welding, and the friction coefficient is reduced compared to before the vibration welding. Can be installed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a net material to be processed according to the present invention.
FIG. 2 is an enlarged view showing a surface mesh layer of the net material shown in FIG. 1;
FIG. 3 is an enlarged view showing a back surface mesh layer of the net material shown in FIG. 1;
FIG. 4 is a perspective view showing a part of a net member for explaining a terminal unit processing method according to the first embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a part of the net member for explaining the terminal unit processing method according to the first embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a part of a net member for explaining a terminal unit processing method according to a second embodiment of the present invention.
FIG. 7 is a cross-sectional view showing a part of a net member for explaining a terminal unit processing method according to a third embodiment of the present invention.
FIG. 8 is a cross-sectional view showing a part of a net member for explaining a terminal unit processing method according to a fourth embodiment of the present invention.
FIG. 9 is a view showing a preferable aspect of a terminal unit processing method according to a fourth embodiment of the present invention, and (a) is a cross-sectional view showing a part of a net material before terminal processing is performed. (B) is sectional drawing which shows a part of net | network material after performing a terminal process.
FIG. 10 is a cross-sectional view showing a part of a net member for explaining a terminal unit processing method according to a fifth embodiment of the present invention.
FIG. 11 is a partial cross-sectional view of a net member showing a state in which a skin material is fixed in a terminal portion processing method according to a fifth embodiment of the present invention.
FIG. 12 is a partial perspective view of a net member showing a state in which a skin material is fixed in a terminal portion processing method according to a fifth embodiment of the present invention.
FIG. 13 is a view showing a preferable aspect of a terminal portion processing method according to a fifth embodiment of the present invention, and is a partial cross-sectional view of a net material in a state where a skin material is fixed.
FIG. 14 is a view showing a preferred aspect of a terminal unit processing method according to a fifth embodiment of the present invention, and is a partial cross-sectional view of a net member in a state in which a cover member is formed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Net material 11 Surface mesh layer 12 Back surface mesh layer 13 Pile 15 End edge 16 Folding surface 17 Opposite surface 18 Adhering site | part 21 Terminal part 22 Thin part 23 Skin material 30 Cover member 31 Slit

Claims (8)

A method for treating a terminal portion of a net material having a three-dimensional structure, which is made of a thermoplastic resin , has a front surface mesh layer and a back surface mesh layer, and is formed by joining the front surface mesh layer and the back surface mesh layer with a number of piles. Then, the end edge is folded inward, and the folded surface and the facing surface facing the folded surface are fixed by the vibration welding means at a position spaced inward from the bent portion, and then the longitudinal direction. A method for treating the end of a net member, comprising: disposing a hollow cover member having a slit along the slit so as to sandwich the fixing portion between the slit forming ends . It is the net | network terminal part processing method of Claim 1, Comprising: In the arbitrary processes from the process of folding | folding the said edge toward an inner side until mounting | wearing with the said cover member, the said folding | turning surface and its opposing surface A terminal processing method for a net material comprising a step of arranging a core material for shape retention between the two . A method for treating a terminal portion of a net material having a three-dimensional structure , which is made of a thermoplastic resin, has a front surface mesh layer and a back surface mesh layer, and is formed by joining the front surface mesh layer and the back surface mesh layer with a number of piles. A skin material having a width wider than the width of the terminal portion on at least one side of the terminal portion after the terminal portion is processed by the vibration welding means so that the thickness is reduced to increase the density of the net structure. Are laminated, the edge of the skin material is aligned with the edge of the net material, and vibration welding is performed by vibration welding means in a developed state, and then the portion protruding beyond the vicinity of the edge is folded back to further vibration welding means. A method for treating a terminal portion of a net material, comprising: welding by vibration and fixing the skin material to the terminal portion. A method for treating a terminal portion of a net material having a three-dimensional structure, which is made of a thermoplastic resin , has a front surface mesh layer and a back surface mesh layer, and is formed by joining the front surface mesh layer and the back surface mesh layer with a number of piles. In addition , a step of processing a portion spaced from the edge toward the inside by a groove shape so that the thickness is reduced by vibration welding means to increase the density of the net structure, and a slit along the longitudinal direction A method for treating a terminal portion of a net material , comprising: a hollow cover member having a structure in which a portion thinly processed by the above-described process is sandwiched between slit forming ends . 5. The method of processing a terminal part of a net material according to claim 4, wherein the density of the net structure is obtained by processing the part spaced from the edge toward the inner side into a groove shape so that the thickness is reduced by vibration welding means. After the step of densifying, the skin material is fixed by vibration welding means to the portion between the portion thinned by the step and the edge, and then the cover member is disposed. To process the terminal part of the net material. 6. The method of processing a terminal part of a net material according to claim 4 or 5, wherein the density of the net structure between the part thinly processed by the step and the edge is formed denser in advance than the part inside thereof. The terminal part processing method of the net | network material characterized by the above-mentioned . A method for treating a terminal portion of a net material having a three-dimensional structure, which is made of a thermoplastic resin , has a front surface mesh layer and a back surface mesh layer, and is formed by joining the front surface mesh layer and the back surface mesh layer with a number of piles. there, the terminal portion is a portion of a predetermined width from the edge inward, a step of closely the density of the net stitch was pressurized Engineering so that the thickness becomes thinner by vibration welding means, epidermis the terminal portion Laminating materials, and fixing the skin material to the terminal portion by vibration welding means, and forming a cover member by injection molding on the skin material fixed by the step. The terminal processing method of the net material. The method for treating a terminal portion of a net material according to claim 7, wherein the skin material having a raised portion is used as the skin material, and the skin material is raised by vibration welding means while raising some of the raised portions without crushing. A method for treating a terminal portion of a net material, characterized by being fixed .

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