JP3554112B2 - Insert molding fastener member and method of connecting the insert molding fastener member to a molding body - Google Patents

Insert molding fastener member and method of connecting the insert molding fastener member to a molding body Download PDF

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JP3554112B2
JP3554112B2 JP18772096A JP18772096A JP3554112B2 JP 3554112 B2 JP3554112 B2 JP 3554112B2 JP 18772096 A JP18772096 A JP 18772096A JP 18772096 A JP18772096 A JP 18772096A JP 3554112 B2 JP3554112 B2 JP 3554112B2
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base
fastener member
molding
main body
fastener
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JPH09224720A (en
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伸二 鳥越
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ミネソタ マイニング アンド マニュファクチャリング カンパニー
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Priority to JP18772096A priority Critical patent/JP3554112B2/en
Priority to DE19651675A priority patent/DE19651675A1/en
Priority to CN97196408A priority patent/CN1082465C/en
Priority to AU33938/97A priority patent/AU3393897A/en
Priority to PCT/US1997/010338 priority patent/WO1998002331A1/en
Priority to DE69707682T priority patent/DE69707682T2/en
Priority to EP97930007A priority patent/EP0912364B1/en
Publication of JPH09224720A publication Critical patent/JPH09224720A/en
Priority to KR1019997000233A priority patent/KR20000023766A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/58—Seat coverings
    • B60N2/5816—Seat coverings attachments thereof
    • B60N2/5825—Seat coverings attachments thereof by hooks, staples, clips, snap fasteners or the like
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
    • A44B18/0069—Details
    • A44B18/0076—Adaptations for being fixed to a moulded article during moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/12—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/727—Fastening elements
    • B29L2031/729—Hook and loop-type fasteners

Description

【０００１】
【発明の属する技術分野】
本発明は、主要面及び主要面の反対側の裏面を有する基部と、基部の主要面に設けられる複数の係合要素とを備えた対面係合式のファスナー部材に関し、特に、基部の裏面に設けられる連結要素をさらに備え、インサート成形工程により、成形主体に埋め込まれる連結要素を介して、成形主体の表面に係合要素を露出させた状態で成形主体に固定的に連結されるインサート成形用ファスナー部材に関する。本発明はさらに、そのようなインサート成形用ファスナー部材を成形主体に固定的に連結する方法に関する。
【０００２】
【従来の技術】
車両用座席、事務用又は家庭用の椅子、マットレス等の、種々の備品、家具類において、発泡性樹脂材料の成形体からなるクッション部材の表面に、布帛や皮革等からなるカバー部材を被着したものが知られている。この種の備品、家具類では、使用中にカバー部材が弛んだりずれたりしないように、カバー部材をクッション部材に強固に固着する必要がある。
【０００３】
従来、例えば自動車用の座席においては、カバー部材をクッション部材に固着するために、ホグリングと称する環状金具や、平板状の基部の主要面に複数の係合要素を配設した対面係合式のファスナー部材（いわゆる面ファスナー）を使用していた。ホグリングは、１つ１つは固着強度に優れる利点を有するが、カバー部材の全体をクッション部材に実質的に密着させて外観を向上させるためには、多数のホグリングを使用しなければならず、固着作業が極めて煩雑でしかも熟練を要するという課題を有していた。
【０００４】
これに対し、対面係合式のファスナー部材を用いる場合は、ファスナー部材をクッション部材の表面の所定位置に固定的に設置するとともに、ファスナー部材の係合要素群と係合可能な対応係合要素をカバー部材の裏面に形成し、クッション部材にカバー部材を被せた後に両係合要素を相互に押し付けて係合させることにより、比較的容易にカバー部材をクッション部材に固着することができる。この場合、ファスナー部材の形状や配置、並びに係合要素の形状や配置を工夫することにより、充分な固着強度及び密着性が得られる。
【０００５】
このような目的で使用されるファスナー部材は、全体が樹脂材料から一体成形されるものや、布帛製又は樹脂製の基部に多数の樹脂製モノフィラメントを植設してなるものがあるが、いずれの場合もクッション部材へ基部を強固に固定する目的で、一般に基部の裏面に、クッション部材に埋込式に連結可能な連結要素を備える。そしてこのファスナー部材を、クッション部材の成形型内にインサートとして配置してクッション部材を成形することにより、クッション部材の表面に係合要素が露出した状態で、連結要素を介してクッション部材に固定的に連結することができる。
【０００６】
【発明が解決しようとする課題】
上記構成を有するファスナー部材は、座席等の備品の触感や外観を損なわないように、カバー部材の固着強度及び密着性を低下させない範囲で可及的に小形であることが所望される。特に自動車用座席では、着席者による荷重が座席上で頻繁に移動するので充分な固着強度が要求され、しかも疲労を軽減するために異物感を排除した高水準の安楽性を提供することが望まれるので、クッション部材の表面に設けた溝部やカバー部材の縫目に沿って配置可能な細長い帯形状を有したファスナー部材が有効に利用されている。
【０００７】
他方、一般に対面係合式のファスナー部材は、係合要素や連結要素の基部からの突出長さに比べて基部の厚みが小さいので、基部に反りや撓みを生じ易い傾向がある。特に全体が樹脂材料から一体成形される構造の場合、押出成形工程や射出成形工程を経て製造されたファスナー部材は、基部の主要面側と裏面側とで、注入される樹脂量の差や係合要素と連結要素との形状及び配置の違い等により生じる収縮率の差異に起因して、成形後に基部の何れかの面を凸とする反りが生じる傾向がある。このような反りは、特にファスナー部材が細長い帯形状を有する場合、及び押出成形工程により成形された場合に、顕著に発生することが判っている。
【０００８】
ところで、対面係合式のファスナー部材を前述したようなインサート成形工程によりクッション部材に固定する際には、クッション部材の型の成形空間内にファスナー部材の支持凹部を設け、この凹部に基部裏面の連結要素を成形空間に露出させてファスナー部材を配置する。このとき、ファスナー部材の係合要素群を凹部に挿入し、かつ基部周縁を凹部壁面に密接させて基部主要面側への発泡性樹脂原液の浸入を防止している。この状態で成形空間に発泡性樹脂原液を注入し、クッション部材を成形すると、ファスナー部材が連結要素を介してクッション部材に固定的に連結される。
【０００９】
したがって、基部に反りを有したファスナー部材を、インサート成形工程によりクッション部材に固定しようとすると、ファスナー部材支持凹部に配置したファスナー部材の基部周縁と凹部壁面との間に隙間が形成され、成形空間に注入された樹脂原液がそのような隙間から基部主要面側へ浸入する危惧が生じる。基部主要面側へ浸入した樹脂原液は、係合要素群に絡まりつつ固化して、ファスナー部材の係合機能を低下させる。また、ファスナー部材が基部に反りを有したままでクッション部材に固定されると、ファスナー部材の係合要素群とカバー部材の対応係合要素との正確な相互係合が困難になってカバー部材の固着強度が劣化したり、カバー部材の固着部位にて触感や外観が損なわれたりする傾向がある。
【００１０】
したがって本発明の目的は、インサート成形工程により成形主体に固定されるファスナー部材において、型内に配置したときの基部の反りや撓みを修正して、係合要素の係合機能を低下させたり、被着体の触感や外観を損なったりすることなく、成形主体の所定位置に強固に固定できるインサート成形用ファスナー部材を提供することにある。さらに本発明は、そのようなインサート成形用ファスナー部材を成形主体に容易に固定的に連結する方法を提供することを目的とする。
【００１１】
【課題を解決するための手段】
上記目的を達成するために、本発明は、主要面及び主要面の反対側の裏面を有する略平坦な帯形状の基部と、基部の主要面に設けられる複数の係合要素と、基部の裏面に設けられる連結要素とを具備し、インサート成形工程により、成形主体に埋め込まれる連結要素を介して、成形主体の表面に係合要素を露出させた状態で成形主体に固定的に連結されるインサート成形用ファスナー部材において、基部は、長手方向へ延びる一対の第１縁と第１縁より短く横断方向へ延びる一対の第２縁とを備え、それら第１縁には、基部より小さな厚みを有した弾性変形可能な薄肉延長部が、第１縁の略全長に亙って横断方向へそれぞれ延設されることを特徴とするインサート成形用ファスナー部材を提供する。
【００１２】
さらに本発明は、上記インサート成形用ファスナー部材において、基部の一対の第２縁に、基部より小さな厚みを有した弾性変形可能な薄肉延長部が、第２縁の略全長に亙って長手方向へそれぞれ延設されてなるファスナー部材を提供する。
【００１３】
さらに本発明は、上記インサート成形用ファスナー部材において、連結要素が、基部の長手方向に延びる長手部分と横断方向に延びる横断部分とを交互に備えて長手方向へ蛇行状に連続して裏面に突設される突条からなるファスナー部材を提供する。
【００１４】
さらに本発明は、上記インサート成形用ファスナー部材において、突条の少なくとも一部分が、裏面との結合基端から先端の自由端へ向かって徐々に拡幅する形状を有するファスナー部材を提供する。
【００１５】
さらに本発明は、上記インサート成形用ファスナー部材において、連結要素が、基部の長手方向へ直線状に連続して裏面に突設される突条からなり、この突条が、裏面から離れた自由端に、裏面との結合基端よりも大きな横断方向寸法を有したアンカー部を備えるファスナー部材を提供する。
【００１６】
さらに本発明は、上記インサート成形用ファスナー部材を成形主体の表面に係合要素を露出させた状態で固定的に連結する方法であって、
ａ）ファスナー部材の基部を受容支持する第１部分と複数の係合要素を収容する第２部分とを備え、第１部分が、成形空間を画成する成形面の所定位置に開口する蟻溝形状を有し、蟻溝を画成する一対の対向傾斜側壁の間の最大間隔がファスナー部材の基部と薄肉延長部との合計横断方向寸法よりも小さく、第２部分が蟻溝の底部に凹設されて第２部分の開口を囲繞する略平坦な環状棚壁が第１部分に形成されてなるファスナー部材支持凹部を備えた成形主体の型を用意し、
ｂ）ファスナー部材の複数の係合要素を支持凹部の第２部分に挿入するとともに、基部の薄肉延長部の各々の自由端を支持凹部の一対の傾斜側壁にそれぞれ当接してそれら薄肉延長部を弾性変形させつつ基部を第１部分に収容し、
ｃ）薄肉延長部の弾性復元力によりファスナー部材の基部を支持凹部内で第２部分に向けて付勢し、それにより基部の主要面の周縁領域を支持凹部の棚壁に密接させて基部の撓曲を修正し、
ｄ）型の成形空間に樹脂原液を注入して、支持凹部の第１部分に配置されたファスナー部材の連結要素を樹脂原液に没入させ、その状態で樹脂原液を固化させて成形主体を成形し、
ｅ）成形主体及び成形主体に連結されたファスナー部材から型を脱離する、
各ステップを有した方法を提供する。
【００１７】
【発明の実施の形態】
以下、添付図面を参照して、本発明をその好適な実施の形態に基づき詳細に説明する。
図１〜図４は、本発明の一実施形態によるインサート成形用のファスナー部材１０を示す。ファスナー部材１０は、樹脂材料の一体成形品からなる対面係合式のファスナー部材であり、略平坦でかつ相互に平行な主要面１２及び裏面１４を有する帯形状の基部１６と、基部１６の主要面１２に所定の離間配置で立設される複数の係合要素１８と、基部１６の裏面１４に突設される連結要素２０とを備える。
【００１８】
帯形状の基部１６は、長手方向へ直線状にかつ相互に平行に延びる一対の第１縁２２と、横断方向へ直線状にかつ相互に平行に第１縁２２より短く延びる一対の第２縁２４（１つの第２縁２４のみ図示）とを備える。基部１６の一対の第１縁２２からは、基部１６より小さな厚みを有した薄肉延長部２６が、第１縁２２の略全長に沿って横断方向へそれぞれ延設される。薄肉延長部２６は、基部１６の主要面１２と同一面上に延長され、したがって基部１６の裏面１４側で第１縁２２に段部２８が形成される。
【００１９】
薄肉延長部２６は、ファスナー部材１０の成形工程において、基部１６の成形と同時に基部１６と同一の樹脂材料から一体成形される。したがって、基部１６より小さな厚みを有した薄肉延長部２６は、基部１６よりも容易に弾性変形可能となっている。この弾性変形は主に、基部１６と薄肉延長部２６との結合部位を支点とした薄肉延長部２６の撓曲ないし揺動として生じる。なお薄肉延長部２６の自由端２６ａは、基部１６の第１縁２２に対し略平行に直線状に延びる。
【００２０】
複数の係合要素１８は、ファスナー部材１０の成形工程において、基部１６の成形と同時に基部１６と同一の樹脂材料から一体成形される。各係合要素１８は、基部１６の主要面１２から略直立状に突出する脚部３０と、脚部３０の先端近傍にて側方へ突設される複数の係合片３２とを備える。したがってファスナー部材１０では、複数の係合要素１８が先端の係合片３２にて相手部材の対応係合要素に係合する。
【００２１】
図３に示すように、複数の係合要素１８は、基部１６上で長手方向へ延びる略平行な２列に沿って、かつ各列間で各係合要素１８の位置を長手方向への配置間隔の半分だけ相互にずらして、いわゆる千鳥状に整列配置される。このような配置は、帯形状のファスナー部材１０において、可及的に少ない樹脂量で相手部材に対する充分な固着強度を確保でき、しかもファスナー部材１０を成形する際の型抜きを容易にする点で有利である。
【００２２】
連結要素２０は、ファスナー部材１０の成形工程において、基部１６の成形と同時に基部１６と同一の樹脂材料から一体成形される。図３に破線で示すように、連結要素２０は、基部１６の長手方向に延びる長手部分３４と、基部１６の横断方向に延びる横断部分３６とを交互に備え、所定断面形状を有する突条として基部１６の長手方向へ蛇行状に連続して形成される。図示実施形態では、長手部分３４は基部１６の第１縁２２に略平行に配置され、横断部分３６は基部１６の第２縁２４に対し僅かに傾斜して配置される。連結要素２０は、後述するインサート成形工程により成形主体に埋め込まれ、それによりファスナー部材１０を、成形主体の表面に複数の係合要素１８を露出させた状態で成形主体に強固に固定的に連結する。
【００２３】
基部１６の裏面１４に蛇行突条として形成される連結要素２０は、成形主体に埋め込まれたときに、連結要素２０と成形主体との接触面積を基部１６の長手方向及び横断方向の両方向に同等かつ充分に確保することを可能にする。その結果、成形主体に連結されたファスナー部材１０は、基部１６をその第１縁２２又は第２縁２４を起点（すなわちきっかけ）として横断方向又は長手方向へ成形主体から捲り上げるように働く分離作用に抗して、連結要素２０による強固な連結力のもとに成形主体の所定位置に保持される。
【００２４】
連結要素２０は、その連結力を向上させるために、少なくとも長手部分３４及び横断部分３６の一部分が、基部裏面１４との結合基端から他端の自由端へ向かって徐々に拡幅する形状（図１及び図２参照）を有することが好ましい。このような形状によれば、連結要素２０は成形主体内に楔状に埋め込まれるので、外力に抗してファスナー部材１０を成形主体の所定位置にさらに強固に保持する。
【００２５】
さらに、蛇行形状を有する連結要素２０は、長手部分３４と横断部分３６とにおいて基部１６の厚みを局部的に増大することにより、基部１６の捩じれに対する剛性を高める作用も果たす。なお、連結要素２０による連結力及び基部補強作用を充分に発揮させるためには、長手部分３４及び横断部分３６を基部１６の裏面１４の長手方向全長及び横断方向全長に亙って配置することが有利である。
【００２６】
上記のような連結力及び基部補強作用を一層向上させるために、連結要素２０はさらに、横断方向へ延びる第２横断部分３８を選択的に備えることができる。第２横断部分３８は、長手方向へ隣接する２つの横断部分３６の間で、１つの長手部分３４に略直角に交差して配置される。第２横断部分３８は、例えば図１及び図２に示すように、角柱状脚部３８ａと脚部先端から膨出する円柱状頭部３８ｂとを有することができる。
【００２７】
上記構成を有するファスナー部材１０は、樹脂材料から成形主体を成形する際に成形主体の型内にインサートとして配置され、それにより成形主体に強固に固定的に連結される。このインサート成形工程を、図５〜図８を参照して以下に説明する。
【００２８】
まず準備ステップとして、成形空間４０を画成する成形面４２の所定位置に、ファスナー部材１０を支持する支持凹部４４を設けた成形主体の型４６を用意する。支持凹部４４は、ファスナー部材１０の基部１６の長手方向寸法ｄに略等しい長手方向寸法Ｄ１と、基部１６と両薄肉延長部２６とを合わせた横断方向寸法ｗ１（図４）より小さい横断方向寸法Ｗ１とを有した略矩形の開口４８を備える。また支持凹部４４は、開口４８から徐々に相互間隔を拡げて延びる略平坦な一対の長手傾斜側壁５０、開口４８から相互に平行に延びる略平坦な一対の横断側壁５２、及びそれら側壁５０、５２に交差して同一面上で略矩形環状に延びる略平坦な棚壁５４によって画成される第１部分４４ａと、棚壁５４に交差する周壁５６を有して第１部分４４ａからさらに凹設される第２部分４４ｂとを備える。したがって図５に示すように、支持凹部４４の第１部分４４ａは、横断方向断面において開口４８から徐々に拡幅した蟻溝形状を有する。
【００２９】
支持凹部４４の第２部分４４ｂは、ファスナー部材１０の基部１６の長手方向寸法ｄより小さい長手方向寸法Ｄ２と、基部１６の横断方向寸法ｗ２（図４）より小さい横断方向寸法Ｗ２とを有した略矩形の開口５８を、棚壁５４に隣接して備える。ファスナー部材１０は、複数の係合要素１８を支持凹部４４の第２部分４４ｂに挿入し、かつ基部１６及び連結要素２０を第１部分４４ａに収容して、基部裏面１４を成形空間４０に露出させた状態で型４６内の所定位置に配置される。なお、第２部分４４ｂは、ファスナー部材１０の係合要素１８が周壁５６との摩擦や熱伝達等により損傷を受けないように、収容した複数の係合要素１８に接触しないだけの広さを有することが望ましい。
【００３０】
支持凹部４４の一対の長手傾斜側壁５０の間の最大間隔Ｗ３（すなわち長手側壁５０と棚壁５４との交差部において測った間隔）は、ファスナー部材１０の基部１６と両薄肉延長部２６とを合わせた横断方向寸法ｗ１に略等しいか僅かに小さく設定される。したがって、ファスナー部材１０を支持凹部４４内に配置すると、ファスナー部材１０の両薄肉延長部２６が弾性的に撓曲して、各薄肉延長部２６の自由端２６ａが支持凹部４４の各長手傾斜側壁５０に密接支持される。このとき、両長手側壁５０が開口４８から凹部内奥へ向かって相互間隔を徐々に拡げるように傾斜しているので、ファスナー部材１０の各薄肉延長部２６は、棚壁５４に向かって凸状に撓曲し、かつそれ自体の弾性復元力の反力として、各長手側壁５０から棚壁５４に接近する方向への力を受ける。この力により、ファスナー部材１０の基部１６は、支持凹部４４の内奥すなわち第２部分４４ｂへ向かって付勢される。
【００３１】
支持凹部４４の第２部分４４ｂの開口５８は、上記したようにファスナー部材１０の基部１６の主要面１２よりも一回り小さい。したがって、両薄肉延長部２６の弾性的撓曲によりファスナー部材１０が第２部分４４ｂへ向かって付勢されると、基部１６の主要面１２の第１縁２２近傍の小幅領域１２ａ（図５）及び第２縁２４近傍の小幅領域１２ｂ（図６）が、支持凹部４４の棚壁５４に当接される。このようにして、支持凹部４４の各長手側壁５０から受ける付勢力により、基部１６の主要面１２がその周縁近傍の各領域１２ａ、１２ｂにて平坦な棚壁５４に押し付けられるので、ファスナー部材１０の成形時に生じていた基部１６の反りや撓みが修正され、基部１６の主要面１２の周縁近傍領域１２ａ、１２ｂと棚壁５４とが密接する。その状態で、ファスナー部材１０が支持凹部４４内に固定的に支持される。
【００３２】
このようにしてファスナー部材１０を支持凹部４４内に支持した後、型４６の成形空間４０に例えば発泡性の樹脂原液６０を注入する。このときファスナー部材１０は、上記したように各薄肉延長部２６の弾性復元力により支持凹部４４内で固定的に保持されているので、第１部分４４ａに流入する樹脂原液６０の流動圧力を受けても移動を生じない。しかも、各薄肉延長部２６の自由端２６ａと各長手側壁５０との密接、及び基部主要面１２の周縁近傍領域１２ａ、１２ｂと棚壁５４との密接により、樹脂原液６０が支持凹部４４の第２部分４４ｂに浸入することは確実に防止される。その結果、樹脂片の混在によるファスナー部材１０の係合要素１８の係合機能の低下が回避される。
【００３３】
樹脂原液６０が固化して成形主体６２が成形されると、ファスナー部材１０は連結要素２０を介して成形主体６２に強固に固定される。その後、成形主体６２から型４６を脱離すると、基部１６を平坦状に保持したファスナー部材１０を、その係合要素１８が露出した状態で表面の所定位置に固定した成形主体６２が得られる。特に樹脂原液６０が発泡性樹脂原液からなる場合、図８に示すようにファスナー部材１０の基部１６の各薄肉延長部２６はそれ自体の弾性復元力により基部主要面１２に平行な原形に復帰し、ファスナー部材１０の基部１６の平坦性が一層向上する。基部１６を平坦状に保持したこのようなファスナー部材１０は、成形主体６２に被着される被着体（図示せず）の対応係合要素にファスナー部材１０の複数の係合要素１８を正確に係合させることを可能にするので、被着体の固着強度を向上させることができる。しかもこのとき、成形主体６２への被着体の固着部位にて、被着体の触感や外観を些かも損なうことがない。
【００３４】
なお、型４６の支持凹部４４において各長手側壁５０と棚壁５４との成す角度αは、例えば８０°以上９０°未満、好ましくは８５°〜８８°の範囲で設定される。この角度αが上記範囲より小さいと、成形主体６２から型４６を脱離する際にファスナー部材１０との連結部位で成形主体６２が損傷したり、長手側壁５０にファスナー部材１０が衝突してファスナー部材１０が成形主体６２から分離したりする傾向がある。他方、角度αが９０°以上では、ファスナー部材１０の基部１６に支持凹部４４の第２部分４４ｂへ向けて及ぼす弾性的付勢力が得られなくなる。
【００３５】
また、支持凹部４４の第２部分４４ｂの開口５８は、ファスナー部材１０の基部１６の横断方向寸法ｗ２に略等しいか僅かに大きい横断方向寸法Ｗ２を有していてもよい。この場合、ファスナー部材１０の各薄肉延長部２６の弾性的付勢作用により、各薄肉延長部２６の基部１６との結合基端近傍領域が支持凹部４４の棚壁５４に密接されることになるが、それによっても基部１６の反りや撓みを修正することは可能である。さらに、支持凹部４４の第１部分４４ａの長手方向寸法Ｄ１は、図６に示すようにファスナー部材１０の基部１６の長手方向寸法ｄより僅かに大きく設定することができる。それにより、各薄肉延長部２６を弾性変形させつつファスナー部材１０を支持凹部４４内に挿入する作業が容易になる。
【００３６】
上記構成を有するファスナー部材１０は、例えば図９に示す自動車用座席１００において、発泡性樹脂材料の成形体からなるクッション部材１０２の表面に、布帛や皮革等からなるカバー部材１０４を被着する際の、カバー部材１０４の固着手段として特に好適に使用される。この場合、ファスナー部材１０は、前述したインサート成形工程により、クッション部材１０２の成形時にクッション部材１０２の表面の所定位置に固定的に連結される。なお、自動車用座席１００へのこのような適用では、着席者に異物感を与えないように、図１０に示すようにクッション部材１０２の所定位置に設けられる溝１０６内にファスナー部材１０を配置することが望ましい。そのためには、図５に示す型４６において、支持凹部４４を設けるために成形面４２から所定高さに突設した突部６４の突出高さを、さらに増加させればよい。しかしながら、ファスナー部材１０の適用によっては、このような突部を介さずに支持凹部４４を型４６の成形面４２に直接に凹設することもできる。
【００３７】
上記した自動車用座席１００への適用において、カバー部材１０４の裏面（クッション部材１０２との接触面）には、ファスナー部材１０の複数の係合要素１８と係合する対応係合要素１０８が設けられる。対応係合要素１０８は、例えば図１１（ａ）に示すように、カバー部材１０４の裏面の所定位置に縫着されたループ材１１０からなる。或いは図１１（ｂ）に示すように、カバー部材１０４の裏面の全体にループ材１１２を被着することもできる。いずれの場合も、図示のようにカバー部材１０４を部分的に撓曲縫合してリブ部分１１４を形成し、このリブ部分１１４に配置されるループ材１１０、１１２を、ファスナー部材１０の基部１６上で２列に並ぶ係合要素１８群の各列間に挿入すれば、各係合要素１８の係合片３２が容易にループ材１１０、１１２に係合し、強固な固着力が得られるので有利である（図１２参照）。
【００３８】
このように、自動車用座席１００へ適用した場合は、クッション部材１０２に連結されたファスナー部材１０の基部１６が平坦状に保持されているので、カバー部材１０４の対応係合要素１０８にファスナー部材１０の複数の係合要素１８を正確に係合させることが可能になり、カバー部材１０４がクッション部材１０２に強固に固着される。しかも、クッション部材１０２へのカバー部材１０４の固着部位にて、カバー部材１０４の触感や外観を些かも損なうことがないので、着席者に高水準の安楽性を提供するとともに高品質感を与えることができる。
【００３９】
本発明に係るインサート成形用ファスナー部材は、様々な形状及び寸法を有することができる。
例えば上記実施形態において、ファスナー部材１０の基部１６は、被着体の固着強度や成形主体への密着性を低下させない範囲で、被着体の触感や外観を損なわないように可及的に小形であることが望ましく、したがって横断方向寸法より大きな長手方向寸法を有する細長い帯形状とされる。基部１６の長手方向寸法ｄは、例えば５０ｍｍ〜５００ｍｍである。また基部１６の横断方向寸法ｗ２は、例えば３ｍｍ〜３０ｍｍ、好ましくは４ｍｍ〜１０ｍｍである。これらの寸法ｄ、ｗ２が上記範囲より小さいと、被着体を強固に固着することが困難となり、上記範囲より大きいと、基部１６の反りや撓みが修正困難なほど顕著になる傾向がある。さらに、基部１６の厚みｔ１（主要面１２と裏面１４との間の距離）は、例えば０．５ｍｍ〜５ｍｍ、好ましくは１ｍｍ〜３ｍｍである。厚みｔ１が上記範囲より小さいと、基部１６の反りや撓みが修正困難なほど顕著になり、上記範囲より大きいと、被着体の触感や外観を損なう傾向がある。
【００４０】
基部１６の薄肉延長部２６は、基部１６の反りや撓みを全体に亙って確実に修正するために、基部１６の第１縁２２の略全長に沿って設けられることが有利である。薄肉延長部２６の横断方向寸法ｅは、例えば１ｍｍ〜１０ｍｍ、好ましくは１．２ｍｍ〜３ｍｍである。横断方向寸法ｅが上記範囲より小さいと、薄肉延長部２６の弾性変形が困難となって基部１６の反りの修正機能が低下し、上記範囲より大きいと、基部１６への弾性的付勢力が低下したり、支持凹部４４内への配置が困難となったりする傾向がある。薄肉延長部２６の厚みｔ２は、例えば０．２ｍｍ〜３ｍｍ、好ましくは０．３ｍｍ〜１ｍｍである。厚みｔ２が上記範囲より小さいと、基部１６への弾性的付勢力が低下し、また支持凹部４４内への配置時に損傷し、上記範囲より大きいと、薄肉延長部２６の弾性変形が困難となって基部１６の反りの修正機能が低下する傾向がある。
【００４１】
基部１６の薄肉延長部２６は、インサート成形工程において型４６の支持凹部４４への基部１６の挿入配置を容易にするために、図１３に示すように、長手方向へ鋸歯状に延びる自由端２６ａを備えることができる。あるいは薄肉延長部２６は、正弦波状又は矩形波状の自由端２６ａを備えてもよい。このような構成によれば、薄肉延長部２６の自由端２６ａと支持凹部４４の長手傾斜側壁５０との接触長さが、図１の実施形態の場合に比べて減少するので、支持凹部４４に基部１６を挿入するに要する力が低減される。この作用効果は、基部１６の長手方向寸法が増加するほど有利なものとなり、作業者の労力負担を軽減する。なおこの場合、基部１６への弾性的付勢力の低下による基部１６の反りの修正機能の劣化が生じない範囲で、薄肉延長部２６の形状を決定することが望まれる。
【００４２】
さらに基部１６は、横断方向へ延びる一対の第２縁２４にも、基部１６より小さな厚みを有した弾性変形可能な薄肉延長部（図示せず）を設けることができる。この薄肉延長部は、第２縁２４の略全長に亙って第２縁２４から長手方向へ延設されることにより、第１縁２２の薄肉延長部２６と同様に、インサート成形工程において型４６の支持凹部４４へ基部１６を挿入する際に弾性変形し、基部１６の反りを修正して基部主要面１２の周縁近傍領域を棚壁５４に密着させる作用を促進する。
【００４３】
係合要素１８は、図１に示す矢尻状頭部を有する突子形状の他に、半球状、球状、錐体状又は笠状の頭部を有する茸形や、フック形、ループ形、傘形、椰子の木形、等の多様な突子形状を有することができる。或いは係合要素として、舌（ｔｏｎｇｕｅ）と溝（ｇｒｏｏｖｅ）との組合せ構造や、米国特許第 ４，８７５，２５９号に開示されるような錐体又は円錐台状の噛合可能な先細り支柱群を適用することもできる。例えば図１及び図１４に示す矢尻状頭部を有する係合要素１８では、基部主要面１２からの突出高さｈ１は、例えば１ｍｍ〜８ｍｍ、好ましくは３ｍｍ〜６ｍｍである。高さｈ１が上記範囲より小さいと、係合要素１８の係合機能が低下し、上記範囲より大きいと、被着体の触感や外観を損なう傾向がある。また、係合要素１８の対向係合片３２の先端間距離ｒは、例えば０．５ｍｍ〜２ｍｍ、脚部３０の太さｓは、例えば０．５ｍｍ〜２ｍｍ、脚部３０の長さｈ２は、例えば１ｍｍ〜５ｍｍである。さらに、基部主要面１２上での係合要素１８の立設密度は、例えば１０本／ｃｍ２ 〜１００本／ｃｍ２ 、好ましくは２５本／ｃｍ２ 〜６０本／ｃｍ２ である。
【００４４】
複数の係合要素１８は、図３に示すような基部１６上で長手方向に沿った２列に並ぶ千鳥状配置に限らず、各列間で横断方向へ重畳する並列配置とすることもできる。また、千鳥状配置及び並列配置のいずれも、長手方向に沿った３列以上の配置とすることができる。このように、複数の係合要素の配置を適宜選択すれば、本発明に係るインサート成形用ファスナー部材と相手部材とを対面状態で１つだけ又は複数の相対回転位置に配置した状態での、両部材の相互係合を可能にすることもできる。ところで、ファスナー部材１０は、その成形時に生じる基部１６の反りや撓みを可及的に低減するために、射出成形工程によって製造することが望まれるが、その場合、２列以上の並列配置では、成形型の脱離が困難となる。そのような場合には、米国特許第５，２４２，６４６号に開示される脚部型のような破壊的に脱離可能な型を使用した射出成形工程によって、基部、係合要素、及び連結要素を、樹脂材料から一体的に形成する方法が有利である。
【００４５】
なお、本発明に係るファスナー部材は、このように基部と係合要素とが同一の樹脂材料から一体成形されるもの（「スーパーデュアルロック」（３Ｍ社の商標名）として知られている）だけでなく、例えばプラスチック製の基部と基部に植設される複数の樹脂製モノフィラメントからなる係合要素とを備えたもの（「デュアルロック」（３Ｍ社の商標名）として知られている）にも適用できる。また係合要素として、フックアンドループ式ファスナー（「スコッチメイト」（３Ｍ社の商標名）として知られている）に用いられるフック又はループを採用することもできる。
【００４６】
連結要素２０は、基部１６を横断方向又は長手方向へ成形主体から捲り上げるように働く分離作用に抵抗するとともに、基部１６の捩じれに対する剛性を高めるために、長手部分３４と横断部分３６とを備えることが好ましい。この場合、連結要素２０は、図３に示す蛇行突条の形状に限らず、例えば図１５（ａ）の長手部分３４と横断部分３６とのみからなる蛇行突条２０ａ、図１５（ｂ）の長手部分３４に溝を有する分離形蛇行突条２０ｂ、図１５（ｃ）の分離形Ｔ字突条２０ｃ、等の形状を採用できる。これらいずれの形状も、ファスナー部材１０の成形時の型の脱離を容易にするとともに、インサート成形時の成形主体の樹脂原液を、空気を基部横断方向へ追い出しつつ連結要素２０の表面の隅々まで容易に行き渡らせるので、ファスナー部材１０と成形主体との連結強度を向上させることができる。
【００４７】
連結要素２０の基部裏面１４からの突出高さｃは、例えば１ｍｍ〜２０ｍｍである。また、ファスナー部材１０と成形主体との連結強度を向上させる図１の楔形状の連結要素２０において、基部裏面１４と連結要素２０の傾斜側面との成す角度は、例えば５°〜３０°である。さらに、ファスナー部材１０と成形主体との連結強度を一層向上させるために、連結要素２０に加えて、例えば係合要素１８と同様の突子形状を有する２次連結要素（図示せず）を選択的に追加することもできる。基部１６に対して垂直方向へ働く引抜き力に対する連結強度は、例えば５ｋｇ以上であり、基部１６に対して第１縁２２から捲り上げるように作用する剥離力に対する連結強度は、例えば２ｋｇ以上である（いずれも基部１６の寸法がｄ＝５０ｃｍ、ｗ２＝８ｍｍの場合）。
【００４８】
ところで、前述したように、図１のファスナー部材１０における連結要素２０は、蛇行状に延びる長手部分３４と横断部分３６とを備えることにより、基部１６の捩じれに対する剛性を高める作用を果たす。それと共に、蛇行形状の連結要素２０は、主要面１２に平行な方向（以下、水平方向と称する）への基部１６の撓曲に対し、高い剛性を発揮することが判っている。したがってファスナー部材１０は、成形主体に直線状に連結される用途には適しているが、水平方向へ基部１６を撓曲した状態で成形主体に連結することが要求される場合には、適用が困難である。このような適用としては、例えば着席者の体形に沿う立体形状を有するバケットシート形式の自動車用座席において、クッション形状に合わせて立体縫製されたカバー部材の曲線状に延びる縫目に沿ってファスナー部材を配置する場合が挙げられる。図１６〜図１８は、このような場合にファスナー部材の適用を可能にする連結要素の幾つかの変形実施形態を示す。
【００４９】
図１６に示す変形実施形態による連結要素７０は、基部１６と同一の樹脂材料から一体成形され、基部１６の長手方向へ直線状に連続して裏面１４に突設される突条からなる。この突条は、基端で裏面１４の横断方向略中央に結合される薄板状の脚部７２を備える。脚部７２は、全体に略均一な厚み（横断方向寸法）を有し、裏面１４の長手方向へ延びる中心線に沿って略直立状に配置される。さらに、裏面１４から離れた側の脚部７２の自由端には、脚部７２の横断方向両側に、基部１６に略平行に延びる薄板状のアンカー部７４が形成される。アンカー部７４は、全体に略均一な厚みを有し、基部１６と両薄肉延長部２６とを合わせた横断方向寸法ｗ１に略等しい横断方向寸法を有する。
【００５０】
このような構成を有する連結要素７０は、材料強度的に平衡した基部１６とアンカー部７４とが脚部７２により所定間隔を開けて結合されているので、基部１６を水平方向へ撓曲する際に、応力が基部１６とアンカー部７４とに略均等に分散して加わる。しかも脚部７２は、それ自体、基部１６の水平方向への撓曲を妨げない。その結果、基部１６は、捩じれたり波状に撓んだりすることなく、水平方向へ容易に撓曲できるようになる。したがって連結要素７０を備えたファスナー部材は、例えばバケットシート形式の自動車用座席において、クッション部材の曲線状に延びる溝に容易にインサート成形でき、しかも立体縫製カバー部材の曲線状縫目の対応係合要素に強固に係合してカバー部材をクッション部材に密着させ、機能性及び意匠性を向上させることができる。また、成形主体の形状に関わらず、人体（例えば着席者）に触れないか又は触れる頻度の少ない位置にファスナー部材を撓曲して設置できるので、使用時の被着体（例えばカバー部材）の触感を損なわずに、充分なファスナー機能を発揮できる。なお連結要素７０は、インサート成形工程により成形主体に埋め込まれたときに、アンカー部７４が成形主体に楔状に食い込んで強固な連結力を発揮することは言うまでもない。
【００５１】
連結要素７０は、基部１６と両薄肉延長部２６とを合わせた横断方向寸法ｗ１、基部１６と連結要素７０とを合わせた高さｐ、及びアンカー部７４の横断方向寸法ｙが互いに略等しいときに、特に基部１６の水平方向への撓曲を容易にする。この場合、撓曲半径に関して内側に脚部７２をずらして配置する（すなわち図１６（ｂ）のＨ状断面をコ状断面に修正する）と、さらに撓曲が容易になる。しかしながらそのような構成では、インサート成形時に作業者が脚部７２の位置を確認しつつ型内に配置しなければならない煩雑さが生じる。また、水平方向へＳ状に蛇行撓曲させることも考慮すれば、やはり図示のように裏面１４の横断方向略中央に脚部７２を配置することが好ましい。
【００５２】
連結要素７０においては、図１６（ａ）に示すように、アンカー部７４に長手方向へ所定間隔を開けて複数のスリット７６を設けることができる。このような構成によれば、インサート成形時に、成形主体がアンカー部７４のスリット７６に侵入した状態で固化するので、ファスナー部材を成形主体に連結する連結力をさらに高めることができる。特にスリット７６は、成形主体を侵入させることにより、基部１６をその第２縁２４を起点として長手方向へ成形主体から捲り上げるように働く分離力に抗して、アンカー部７４を成形主体に強固に掛止するように作用する。このような観点では、基部１６を長手方向へ捲り上げる起点となり得る第２縁２４に隣接して、少なくとも１つのスリット７６を設ければよい。
【００５３】
スリット７６はさらに、主要面１２を凹面にすべく基部１６を主要面１２に直交する方向（以下、垂直方向と称する）へ撓曲することを容易にする作用も果たす。この作用により、連結要素７０を備えたファスナー部材は、特に車両用座席のクッション部材の表面の多様な三次元曲面部分に設置でき、カバー部材の固着部位を所望位置に設定できるので、座席デザインの自由度が広がる利点がある。なおこのような観点では、スリット７６の個数を増やし、また脚部７２にもスリット７６を連続して形成することが有利である。しかしながらその場合、基部１６を水平方向へ撓曲する際の応力の平衡／分散効果が薄れ、水平方向への撓曲が困難になる傾向がある。したがって、要求される撓曲方向に対応して、スリット７６の形状及び個数を選択することが望ましい。
【００５４】
スリット７６の長手方向寸法ｘは、水平方向への撓曲を容易にする観点では可及的に小さいことが望ましいが、ｘが小さすぎると成形主体を侵入させることが困難となり、基部１６を長手方向へ成形主体から捲り上げるように働く分離作用に対する抵抗力が低下する危惧が生じる。したがってスリット７６は、図示のようにｘが脚部７２に隣接する部位で可及的に小さく、アンカー部７４の先端に向かって徐々に拡大されるような形状を有することが好ましい。
【００５５】
図１７に示す変形実施形態による連結要素８０は、基部１６と同一の樹脂材料から一体成形され、基部１６の長手方向へ直線状に連続して裏面１４に突設される突条からなる。この突条は、基端で裏面１４の横断方向略中央に結合される薄板状の脚部８２を備える。脚部８２は、裏面１４との結合基端から先端の自由端に向かって徐々に拡大される厚み（横断方向寸法）を有し、自由端の最大横断方向寸法を有する領域がアンカー部８４として作用する。
【００５６】
連結要素８０は、裏面１４から離れた先端の自由端に、裏面１４との結合基端よりも大きな横断方向寸法を有したアンカー部８４を備えることにより、図１６の連結要素７０と同様に、基部１６を水平方向へ撓曲する際の応力を基部１６とアンカー部７４とに分散して加えることができ、その結果、基部１６の水平方向への撓曲を容易にすることができる。しかしながら連結要素８０では、アンカー部８４すなわち脚部８２の最大横断方向寸法ｑが、基部１６と両薄肉延長部２６とを合わせた横断方向寸法ｗ１よりも小さいので、連結要素７０に比べると基部１６の水平方向への撓曲を容易にする作用は劣る。
【００５７】
連結要素８０においては、脚部８２の自由端近傍に脚部８２を横断方向へ貫通する複数の貫通孔８６を長手方向へ所定間隔を開けて設けることができる。このような構成によれば、インサート成形時に、成形主体が貫通孔８６に侵入した状態で固化するので、ファスナー部材を成形主体に連結する連結力をさらに高めることができる。特に貫通孔８６は、成形主体を侵入させることにより、基部１６をその第２縁２４を起点として長手方向へ成形主体から捲り上げるように働く分離力に抗して、脚部８２を成形主体に強固に掛止するように作用する。なお貫通孔８６の寸法は、脚部８２の機械的強度を著しくは低下させない範囲で決定することが望ましい。
【００５８】
例として、基部１６を水平方向へ１００ｍｍ以上の曲率半径で撓曲させることを想定した場合の、上記各変形実施態様における好適な寸法を以下に列記する。基部１６の厚みｔ１＝０．５ｍｍ〜３ｍｍ。基部１６と両薄肉延長部２６とを合わせた横断方向寸法ｗ１＝４ｍｍ〜２０ｍｍ。基部１６と連結要素７０（８０）とを合わせた高さｐ＝４ｍｍ〜２０ｍｍ。脚部７２（８２）の最大横断方向寸法ｑ＝０．５ｍｍ〜５ｍｍ。アンカー部７４の厚みｓ＝０．５ｍｍ〜３ｍｍ。アンカー部７４の横断方向寸法ｙ＝２．５ｍｍ〜２０ｍｍ。スリット７６の最大長手方向寸法ｘ＝０．５ｍｍ〜５ｍｍ。スリット７６により分割されたアンカー部７４の最大長手方向寸法ｚ＝５ｍｍ〜５０ｍｍ。スリット７６の個数（長手方向１０ｃｍ当り）＝１個〜２０個。なお、同様の寸法範囲で、前述したように薄肉延長部２６の自由端２６ａを波状又は鋸歯状に形成した場合には、基部１６を水平方向へ５０ｍｍ以上の曲率半径で撓曲できる。
【００５９】
本発明に係るファスナー部材は、帯状であるので、上記説明にて検討した通り、成形主体にインサート成形した後に基部をその第２縁を起点として長手方向へ成形主体から捲り上げるように働く分離力に抗して基部を成形主体に強固に掛止できることが所望される。このような機能を付与するために、例えば図１、図１６及び図１７に示す各実施形態において、図１８に示すように、基部１６のみを第２縁２４の近傍で長手方向へ延長することができる。この場合、成形主体の型４６の成形面４２から所定高さの位置に支持凹部４４を設けるとともに、支持凹部４４を画成する横断側壁５２（図６）を省略して棚壁５４を支持凹部４４の外側に連通させ、図示のように基部１６の長手延長部１６ａを棚壁５４で支持しつつ支持凹部４４の外側に延長させた状態で、ファスナー部材を型４６に配置する（図１８（ａ））。この状態でインサート成形を行えば、図１８（ｂ）に示すように、基部１６の長手延長部１６ａが成形主体６２に埋め込まれるので、基部１６をその第２縁２４を起点として長手方向へ成形主体６２から捲り上げるように働く分離力に抗して、基部１６が成形主体６２に強固に掛止される。
【００６０】
また、本発明に係るファスナー部材は、上記各実施例に記載したようなファスナー部材（便宜的に単体ファスナー部材と称する）を２本又はそれ以上の本数だけ長手方向へ結合してなるものを含む。このような結合形ファスナー部材は、複数の単体ファスナー部材同士を、基部の横断方向寸法より小さな横断方向寸法を有した撓曲自在な結合要素（ジョイント）により結合して、好ましくは一体的に成形される。したがって結合形ファスナー部材は、複数の単体ファスナー部材を成形主体上の比較的近接した複数箇所に取付ける際に、各単体ファスナー部材の位置決めを容易にし、作業性を向上させる効果を奏する。
【００６１】
好ましくは結合要素は、基部と同じ材料から基部に同一厚みに一体成形され、基部同士を相互に結合する。このような構成の結合要素は、基部よりも小さな横断方向寸法を付与することにより、基部よりも容易に撓曲可能となる。また結合要素として、針金等の可撓性金属材料からなる線材又は細帯材を使用し、インサート成形法により各単体ファスナー部材に一体的に組込むこともできる。さらに結合要素は、結合形ファスナー部材を成形主体にインサート成形する際に、成形主体に埋め込まれる形状でもよいが、結合要素自体にも前述した連結要素を設けて、その連結要素により結合要素が成形主体に固定的に連結される構成が好ましい。成形主体上での各単体ファスナー部材の相対配置は任意であるが、作業性を考慮した場合、結合要素の長手方向寸法は好ましくは５ｍｍ〜１００ｍｍの範囲で設定される。
【００６２】
本発明に係るファスナー部材は、様々な材料から形成することができる。特に、基部の薄肉延長部の弾性変形により基部に適当な付勢力を及ぼすために、薄肉延長部の曲げ弾性率が好ましくは９８００Ｎ／ｃｍ２ 〜２４５０００Ｎ／ｃｍ２ 、特に好ましくは４９０００Ｎ／ｃｍ２ 〜１９６０００Ｎ／ｃｍ２ の範囲にあることが要求される。このような曲げ弾性率を達成するために、ファスナー部材の好適な材料として、ポリアミド（６−ナイロン（商標）、６，６−ナイロン（商標）等）、ポリプロピレン、ポリエチレン、アイオノマー、ポリアセタール、ポリエステル（ポリエチレンテレフタレート、ポリエチレンナフタレート等）、ポリフェニレンスルフィド、ポリエーテルケトン、ポリエーテルエステル、ポリエーテルサルフォン、ポリエーテルイミド、ポリサルフォン、ポリアリレートが挙げられる。このうち特に好適な材料は、６−ナイロン（商標）、６，６−ナイロン（商標）、ポリプロピレンである。
【００６３】
またこのような樹脂材料に、カーボンブラック、グラスファイバー、酸化チタン、酸化鉄等の充填材を添加して、曲げ弾性率を好適な範囲に制御することもできる。特に好適な充填材はカーボンブラックである。この場合、カーボンブラックの含有量は、好ましくは１００重量部の樹脂に対して０．０１〜１０重量部、特に好ましくは１〜５重量部の範囲である。カーボンブラックの含有量がこの範囲より少ないと弾性率の制御が困難になる傾向があり、この範囲より多いとカーボンブラックによる潤滑効果が顕著になり、ファスナー部材を成形主体に連結する連結強度が低下する傾向がある。
【００６４】
なお、前述した自動車用座席１００への適用においては、クッション部材１０２は例えば、ポリプロピレングリコール等のポリオールと、トリレンジイソシアネート等のポリイソシアネートと、アミン水溶液等の発泡剤、硬化促進剤等との混合物からなる発泡性樹脂材料から成形される。この混合物は、通常、使用直前に攪拌、混合してから型に注入し、注入後、２５℃〜１８０℃の温度で発泡─硬化操作を行い、硬化させる。他方、カバー部材１０４に設けた対応係合要素１０８のループ高さは、例えば１ｍｍ〜１０ｍｍ、好ましくは３ｍｍ〜４ｍｍである。
【００６５】
【発明の効果】
以上の説明から明らかなように、本発明によれば、型内にインサートとして配置したときのファスナー部材の基部の反りや撓みを確実に修正できるので、係合要素の係合機能を低下させたり、被着体の触感や外観を損なったりすることなく、成形主体の所定位置にファスナー部材を強固に固定することが可能となる。さらに本発明によれば、そのようなインサート成形用ファスナー部材を成形主体に容易に固定的に連結することが可能となる。
【図面の簡単な説明】
【図１】本発明の一実施形態によるファスナー部材の部分拡大斜視図である。
【図２】図１のファスナー部材の正面図である。
【図３】図１のファスナー部材の平面図である。
【図４】図３の線ＩＶ−ＩＶに沿った横断方向断面図である。
【図５】図１のファスナー部材を型内にインサートとして配置した状態を示す横断方向断面図である。
【図６】図１のファスナー部材を型内にインサートとして配置した状態を示す長手方向断面図である。
【図７】図６の型に樹脂原液を注入した状態を示す横断方向断面図である。
【図８】インサート成形工程によりファスナー部材を表面に固定した成形主体の横断方向断面図である。
【図９】本発明に係るファスナー部材を適用可能な自動車用座席の斜視図である。
【図１０】図９の線Ｘ−Ｘに沿った部分拡大断面図である。
【図１１】本発明に係るファスナー部材に係合する被着体の対応係合要素を示す図で、（ａ）局部ループ部材を使用した場合の被着体裏面の部分拡大斜視図、及び（ｂ）全面ループ部材を使用した場合の被着体の部分拡大斜視図、である。
【図１２】被着体の対応係合要素に係合したファスナー部材を示す拡大断面図である。
【図１３】薄肉延長部の変形実施形態を示す平面図である。
【図１４】図１２のファスナー部材の係合要素を示す部分拡大断面図である。
【図１５】（ａ）〜（ｃ）は、図１のファスナー部材の連結要素の変形例を示す部分拡大底面図である。
【図１６】連結要素の変形実施形態を示す図で、（ａ）ファスナー部材の部分拡大斜視図、及び（ｂ）線 ＸＶＩ−ＸＶＩ に沿った断面図、である。
【図１７】連結要素の他の変形実施形態を示す図で、（ａ）ファスナー部材の部分拡大斜視図、及び（ｂ）線ＸＶＩＩ−ＸＶＩＩに沿った断面図、である。
【図１８】基部の変形実施形態を示す図で、（ａ）成形主体の型に配置したファスナー部材の長手方向断面図、及び（ｂ）成形主体にインサート成形されたファスナー部材の長手方向断面図、である。
【符号の説明】
１０…ファスナー部材
１６…基部
１８…係合要素
２０、７０、８０…連結要素
２２…第１縁
２４…第２縁
２６…薄肉延長部
３４…長手部分
３６…横断部分
４４…支持凹部
４６…型
５０…長手側壁
５４…棚壁
６２…成形主体
７２、８２…脚部
７４、８４…アンカー部
１０２…クッション部材
１０４…カバー部材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a face-to-face engagement type fastener member including a base having a main surface and a back surface opposite to the main surface, and a plurality of engagement elements provided on the main surface of the base, and more particularly, provided on a back surface of the base. Molding fastener, which is further provided with a connecting element which is embedded in the main body of the molding by an insert molding step, with the engaging element being exposed on the surface of the main body of the molding by the insert molding step. Regarding members. The present invention further relates to a method of fixedly connecting such a fastener member for insert molding to a molding body.
[0002]
[Prior art]
In various fixtures and furniture such as vehicle seats, office or home chairs, mattresses, and the like, a cover member made of cloth, leather, or the like is adhered to the surface of a cushion member made of a foamed resin material molded body. Is known. In this kind of equipment and furniture, it is necessary to firmly fix the cover member to the cushion member so that the cover member does not loosen or slip during use.
[0003]
2. Description of the Related Art Conventionally, for example, in an automobile seat, an annular metal fitting called a hog ring or a face-to-face engagement type fastener in which a plurality of engagement elements are arranged on a main surface of a flat base to fix a cover member to a cushion member. A member (so-called hook-and-loop fastener) was used. Hog rings have the advantage of being superior in fixing strength one by one, but in order to improve the appearance by making the entire cover member substantially adhere to the cushion member, a large number of hog rings must be used, There was a problem that the fixing operation was extremely complicated and required skill.
[0004]
On the other hand, in the case where the fastener member of the face-to-face engagement type is used, the fastener member is fixedly installed at a predetermined position on the surface of the cushion member, and the corresponding engagement element engageable with the engagement element group of the fastener member. The cover member can be relatively easily fixed to the cushion member by being formed on the back surface of the cover member and pressing the two engagement elements together after the cover member is put on the cushion member to engage with each other. In this case, sufficient fixation strength and adhesion can be obtained by devising the shape and arrangement of the fastener member and the shape and arrangement of the engagement element.
[0005]
Fastener members used for such purposes include those integrally molded from a resin material as a whole and those formed by implanting a large number of resin monofilaments on a fabric or resin base. Also in this case, for the purpose of firmly fixing the base to the cushion member, a connecting element that can be embedded and connected to the cushion member is generally provided on the back surface of the base. By arranging the fastener member as an insert in a molding die of the cushion member and molding the cushion member, the fastener member is fixedly connected to the cushion member via the connection element in a state where the engagement element is exposed on the surface of the cushion member. Can be connected.
[0006]
[Problems to be solved by the invention]
It is desirable that the fastener member having the above configuration be as small as possible within a range that does not reduce the fixing strength and adhesion of the cover member so as not to impair the feel and appearance of the equipment such as the seat. In particular, in the case of automobile seats, the load by the occupant frequently moves on the seat, so that a sufficient fixing strength is required, and it is desirable to provide a high level of comfort without a foreign-body sensation in order to reduce fatigue. Therefore, a fastener member having an elongated band shape that can be arranged along a groove provided on the surface of the cushion member or a seam of the cover member is effectively used.
[0007]
On the other hand, in general, the fastener member of the face-to-face engagement type has a smaller thickness of the base than the protrusion length of the engagement element or the connection element from the base, and therefore, the base tends to be easily warped or bent. In particular, in the case of a structure in which the whole is integrally molded from a resin material, the fastener member manufactured through the extrusion molding process or the injection molding process has a difference in the amount of injected resin between the main surface side and the back surface side of the base portion and the difference. Due to a difference in shrinkage caused by a difference in shape and arrangement between the joining element and the connecting element, there is a tendency that warpage occurs in which any surface of the base is convex after molding. It has been found that such a warp occurs remarkably especially when the fastener member has an elongated band shape and when the fastener member is formed by an extrusion forming process.
[0008]
By the way, when fixing the fastener member of the face-to-face engagement type to the cushion member by the insert molding process as described above, a support concave portion of the fastener member is provided in the molding space of the cushion member mold, and the concave portion of the base member is connected to the concave portion. A fastener member is placed exposing the element to the molding space. At this time, the engaging element group of the fastener member is inserted into the concave portion, and the peripheral edge of the base portion is brought into close contact with the wall surface of the concave portion, thereby preventing the foamable resin stock solution from entering the base main surface side. In this state, when the foamable resin stock solution is injected into the molding space to form the cushion member, the fastener member is fixedly connected to the cushion member via the connection element.
[0009]
Therefore, when the fastener member having a warped base is to be fixed to the cushion member by the insert molding process, a gap is formed between the base peripheral edge of the fastener member arranged in the fastener member supporting recess and the wall surface of the recess, and the molding space is formed. There is a risk that the stock resin solution injected into the base may enter the base main surface side from such a gap. The undiluted resin solution that has entered the base main surface side is solidified while being entangled in the engagement element group, and reduces the engagement function of the fastener member. In addition, when the fastener member is fixed to the cushion member with the base having a warp, it is difficult to accurately engage the engagement element group of the fastener member with the corresponding engagement element of the cover member, and the cover member Of the cover member tends to be degraded, and the feel and appearance of the cover member at the fixed portion tend to be impaired.
[0010]
Therefore, an object of the present invention is to reduce the engaging function of the engaging element by correcting the warpage or bending of the base when placed in the mold in the fastener member fixed to the molding main body by the insert molding step, An object of the present invention is to provide a fastener member for insert molding that can be firmly fixed to a predetermined position of a molding main body without impairing the feel and appearance of an adherend. Another object of the present invention is to provide a method for easily and fixedly connecting such a fastener member for insert molding to a molding main body.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a substantially flat band-shaped base having a main surface and a back surface opposite to the main surface, a plurality of engagement elements provided on the main surface of the base, and a back surface of the base. And a connecting element provided on the molding main body, and the insert being fixedly connected to the molding main body in a state where the engaging element is exposed on the surface of the molding main body via the connecting element embedded in the molding main body by the insert molding process. In the fastener member for molding, the base includes a pair of first edges extending in a longitudinal direction and a pair of second edges shorter than the first edge and extending in a transverse direction, and the first edges have a smaller thickness than the base. The insert-formed fastener member is characterized in that the elastically deformable thin-walled extension portions extend in the transverse direction over substantially the entire length of the first edge.
[0012]
Further, the present invention provides the insert-molding fastener member, wherein a pair of second edges of the base have a thin elastically deformable thin extension having a thickness smaller than that of the base in the longitudinal direction over substantially the entire length of the second edge. And a fastener member which is respectively extended.
[0013]
Furthermore, the present invention provides the fastener member for insert molding, wherein the connecting element has a longitudinal portion extending in the longitudinal direction of the base portion and a transverse portion extending in the transverse direction alternately and continuously projects in a meandering manner in the longitudinal direction to the back surface. Provided is a fastener member comprising a ridge provided.
[0014]
Further, the present invention provides the above-mentioned fastener member for insert molding, wherein at least a part of the ridge has a shape that gradually widens from a base end connected to the back surface to a free end at the tip.
[0015]
Further, the present invention provides the insert molding fastener member, wherein the connecting element comprises a ridge that is linearly and continuously protruding from the back surface in the longitudinal direction of the base, and the ridge is a free end separated from the back surface. Another object of the present invention is to provide a fastener member including an anchor portion having a transverse dimension larger than a base end of the fastener member.
[0016]
Further, the present invention is a method of fixedly connecting the insert molding fastener member in a state where the engagement element is exposed on the surface of the molding main body,
a) a dovetail including a first portion for receiving and supporting the base of the fastener member and a second portion for accommodating a plurality of engagement elements, the first portion opening at a predetermined position on a molding surface defining a molding space; A maximum distance between a pair of opposed inclined side walls having a shape and defining a dovetail groove is smaller than a total transverse dimension of the base of the fastener member and the thin extension, and a second portion is recessed at the bottom of the dovetail groove. A mold having a main body provided with a fastener member supporting recess formed by forming a substantially flat annular shelf wall surrounding the opening of the second portion in the first portion;
b) inserting the plurality of engaging elements of the fastener member into the second portion of the support recess, and contacting the free ends of the thin extension of the base with a pair of inclined side walls of the support recess, respectively; The base is housed in the first part while being elastically deformed,
c) The elastic restoring force of the thin extension urges the base of the fastener member toward the second portion in the support recess, thereby bringing the peripheral area of the main surface of the base into close contact with the shelf wall of the support recess, and Fix the flex,
d) Injecting the undiluted resin solution into the molding space of the mold to immerse the connecting element of the fastener member arranged in the first portion of the supporting recess into the undiluted resin solution, and solidifying the undiluted resin solution in this state to form a molding subject. ,
e) removing the mold from the molding body and the fastener member connected to the molding body;
A method having each step is provided.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the accompanying drawings.
1 to 4 show a fastener member 10 for insert molding according to an embodiment of the present invention. The fastener member 10 is a face-to-face engagement type fastener member made of an integrally molded resin material. The fastener member 10 has a band-shaped base 16 having a substantially flat and parallel main surface 12 and a back surface 14, and a main surface of the base 16. 12 includes a plurality of engagement elements 18 erected at a predetermined distance from each other and a connection element 20 protruding from the back surface 14 of the base 16.
[0018]
The band-shaped base 16 has a pair of first edges 22 extending linearly and parallel to each other in the longitudinal direction, and a pair of second edges extending linearly and parallel to each other in the transverse direction and shorter than the first edges 22. 24 (only one second edge 24 is shown). From the pair of first edges 22 of the base 16, thin extension portions 26 having a thickness smaller than that of the base 16 extend in the transverse direction along substantially the entire length of the first edge 22. The thin extension 26 extends on the same plane as the main surface 12 of the base 16, so that a step 28 is formed on the first edge 22 on the back surface 14 side of the base 16.
[0019]
The thin extension 26 is integrally formed from the same resin material as the base 16 at the same time as the base 16 is formed in the process of forming the fastener member 10. Therefore, the thin extension 26 having a smaller thickness than the base 16 can be elastically deformed more easily than the base 16. This elastic deformation mainly occurs as bending or swinging of the thin extension 26 with the joint between the base 16 and the thin extension 26 as a fulcrum. The free end 26 a of the thin extension 26 extends linearly substantially parallel to the first edge 22 of the base 16.
[0020]
The plurality of engagement elements 18 are integrally formed from the same resin material as the base 16 at the same time as the base 16 is formed in the step of forming the fastener member 10. Each engagement element 18 includes a leg 30 that projects substantially upright from the main surface 12 of the base 16, and a plurality of engagement pieces 32 that protrude laterally near the tip of the leg 30. Therefore, in the fastener member 10, the plurality of engagement elements 18 are engaged with the corresponding engagement elements of the mating member by the engagement pieces 32 at the tip.
[0021]
As shown in FIG. 3, the plurality of engagement elements 18 are longitudinally arranged along two substantially parallel rows extending longitudinally on the base 16 and between each row. They are shifted from each other by half of the interval and arranged in a so-called staggered manner. Such an arrangement is such that in the belt-shaped fastener member 10, a sufficient amount of resin can be secured to the mating member with a minimum amount of resin, and the die member is easily removed when the fastener member 10 is formed. It is advantageous.
[0022]
The connecting element 20 is integrally formed from the same resin material as the base 16 at the same time when the base 16 is formed in the step of forming the fastener member 10. As shown by a broken line in FIG. 3, the connecting element 20 is provided with a longitudinal portion 34 extending in the longitudinal direction of the base 16 and a transverse portion 36 extending in the transverse direction of the base 16 alternately, and as a ridge having a predetermined cross-sectional shape. The base 16 is formed continuously in a meandering manner in the longitudinal direction. In the illustrated embodiment, the longitudinal portion 34 is disposed substantially parallel to the first edge 22 of the base 16 and the transverse portion 36 is disposed at a slight angle with respect to the second edge 24 of the base 16. The connecting element 20 is embedded in the molding main body by an insert molding process described later, thereby firmly and securely connecting the fastener member 10 to the molding main body with the plurality of engaging elements 18 exposed on the surface of the molding main body. I do.
[0023]
The connecting element 20 formed as a meandering ridge on the back surface 14 of the base 16 has the same contact area between the connecting element 20 and the forming body in both the longitudinal direction and the transverse direction of the base 16 when embedded in the forming body. And it is possible to secure enough. As a result, the fastener member 10 connected to the forming main body has a separating action that acts to roll up the main body in the transverse or longitudinal direction starting from the base 16 at the first edge 22 or the second edge 24 (that is, as a trigger). Is held at a predetermined position of the forming body under a strong connecting force by the connecting element 20.
[0024]
The connecting element 20 has a shape in which at least a portion of the longitudinal portion 34 and a portion of the transverse portion 36 gradually widen from a base end connected to the base back surface 14 to a free end at the other end to improve the connecting force (see FIG. 1 and FIG. 2). According to such a shape, since the connecting element 20 is embedded in a wedge shape in the forming main body, the fastener member 10 is more firmly held at a predetermined position of the forming main body against external force.
[0025]
Furthermore, the connecting element 20 having a meandering shape also serves to increase the rigidity of the base 16 against torsion by locally increasing the thickness of the base 16 at the longitudinal portion 34 and the transverse portion 36. In order to sufficiently exert the connecting force and the base reinforcing effect of the connecting element 20, the longitudinal portion 34 and the transverse portion 36 should be arranged along the entire longitudinal length and transverse length of the back surface 14 of the base 16. It is advantageous.
[0026]
To further enhance the coupling force and base reinforcement as described above, the coupling element 20 can optionally further comprise a second transverse section 38 extending in the transverse direction. The second transverse portion 38 is disposed between two longitudinally adjacent transverse portions 36 so as to cross the one longitudinal portion 34 at a substantially right angle. The second transverse portion 38 may have, for example, a prismatic leg portion 38a and a cylindrical head portion 38b bulging from the tip of the leg portion, as shown in FIGS.
[0027]
The fastener member 10 having the above configuration is arranged as an insert in a mold of the molding main body when molding the molding main body from the resin material, and thereby is firmly and fixedly connected to the molding main body. This insert molding step will be described below with reference to FIGS.
[0028]
First, as a preparatory step, a mold 46 of a molding main body having a support concave portion 44 for supporting the fastener member 10 at a predetermined position of a molding surface 42 defining a molding space 40 is prepared. The support recess 44 has a longitudinal dimension D1 substantially equal to the longitudinal dimension d of the base 16 of the fastener member 10, and a transverse dimension smaller than a transverse dimension w1 (FIG. 4) obtained by combining the base 16 and the thin extension portions 26. A substantially rectangular opening 48 having W1 is provided. The support recess 44 includes a pair of substantially flat longitudinally inclined side walls 50 extending gradually from the opening 48 and a pair of substantially flat transverse side walls 52 extending parallel to each other from the opening 48 and the side walls 50 and 52. And a first portion 44a defined by a substantially flat shelf wall 54 extending in a substantially rectangular ring shape on the same surface, and a peripheral wall 56 intersecting the shelf wall 54, and further recessed from the first portion 44a. And a second portion 44b to be formed. Therefore, as shown in FIG. 5, the first portion 44a of the support concave portion 44 has a dovetail shape gradually widened from the opening 48 in the cross section in the transverse direction.
[0029]
The second portion 44b of the support recess 44 has a longitudinal dimension D2 smaller than the longitudinal dimension d of the base 16 of the fastener member 10, and a transverse dimension W2 smaller than the transverse dimension w2 (FIG. 4) of the base 16. A substantially rectangular opening 58 is provided adjacent the shelf wall 54. The fastener member 10 inserts the plurality of engagement elements 18 into the second portion 44b of the support recess 44, and accommodates the base 16 and the coupling element 20 in the first portion 44a, exposing the base back surface 14 to the molding space 40. In this state, it is arranged at a predetermined position in the mold 46. In addition, the second portion 44b is large enough not to contact the plurality of accommodated engaging elements 18 so that the engaging elements 18 of the fastener member 10 are not damaged by friction with the peripheral wall 56 or heat transfer. It is desirable to have.
[0030]
The maximum distance W3 between the pair of longitudinally inclined side walls 50 of the support concave portion 44 (ie, the distance measured at the intersection of the longitudinal side wall 50 and the shelf wall 54) is determined by the distance between the base 16 of the fastener member 10 and the two thin extension portions 26. It is set substantially equal to or slightly smaller than the combined transverse dimension w1. Therefore, when the fastener member 10 is disposed in the support recess 44, both the thin extension portions 26 of the fastener member 10 are elastically bent, and the free ends 26 a of the thin extension portions 26 become the longitudinally inclined side walls of the support recess 44. 50 closely supported. At this time, since the two long side walls 50 are inclined so as to gradually increase the mutual distance from the opening 48 toward the inside of the concave portion, each thin extension 26 of the fastener member 10 is convex toward the shelf wall 54. , And receives a force from each longitudinal side wall 50 in a direction approaching the shelf wall 54 as a reaction force of its own elastic restoring force. With this force, the base 16 of the fastener member 10 is urged toward the inside of the support concave portion 44, that is, toward the second portion 44b.
[0031]
The opening 58 of the second portion 44b of the support recess 44 is slightly smaller than the main surface 12 of the base 16 of the fastener member 10 as described above. Accordingly, when the fastener member 10 is urged toward the second portion 44b by the elastic bending of the thin extension portions 26, the small width region 12a near the first edge 22 of the main surface 12 of the base portion 16 (FIG. 5). The small width region 12 b (FIG. 6) near the second edge 24 abuts on the shelf wall 54 of the support recess 44. In this manner, the main surface 12 of the base 16 is pressed against the flat shelf wall 54 in the regions 12a and 12b near the peripheral edge thereof by the biasing force received from each longitudinal side wall 50 of the support concave portion 44. The warpage and the bending of the base 16 generated during the molding of the base 16 are corrected, and the peripheral wall vicinity regions 12a and 12b of the main surface 12 of the base 16 and the shelf wall 54 come into close contact. In this state, the fastener member 10 is fixedly supported in the support recess 44.
[0032]
After supporting the fastener member 10 in the support recess 44 in this manner, for example, a foamable resin stock solution 60 is injected into the molding space 40 of the mold 46. At this time, since the fastener member 10 is fixedly held in the support concave portion 44 by the elastic restoring force of each thin extension portion 26 as described above, the fastener member 10 receives the flow pressure of the resin solution 60 flowing into the first portion 44a. No movement occurs. In addition, due to the close contact between the free end 26a of each thin extension 26 and each longitudinal side wall 50 and the close contact between the peripheral edge regions 12a and 12b of the base main surface 12 and the shelf wall 54, the undiluted resin solution 60 Penetration into the two parts 44b is reliably prevented. As a result, a decrease in the engagement function of the engagement element 18 of the fastener member 10 due to the mixture of the resin pieces is avoided.
[0033]
When the resin solution 60 solidifies to form the molding main body 62, the fastener member 10 is firmly fixed to the molding main body 62 via the connecting element 20. Thereafter, when the mold 46 is detached from the molding main body 62, the molding main body 62 in which the fastener member 10 holding the base 16 in a flat shape is fixed at a predetermined position on the surface with the engaging element 18 exposed is obtained. In particular, when the resin stock solution 60 is made of a foamable resin stock solution, as shown in FIG. 8, each thin extension 26 of the base 16 of the fastener member 10 returns to its original shape parallel to the base main surface 12 by its own elastic restoring force. The flatness of the base 16 of the fastener member 10 is further improved. Such a fastener member 10 holding the base portion 16 in a flat shape allows the plurality of engagement elements 18 of the fastener member 10 to be accurately aligned with corresponding engagement elements of an adherend (not shown) adhered to the molding main body 62. Therefore, the fixing strength of the adherend can be improved. In addition, at this time, the tactile sensation and appearance of the adherend are not slightly impaired at the portion where the adherend is fixed to the molding main body 62.
[0034]
The angle α between each longitudinal side wall 50 and the shelf wall 54 in the support concave portion 44 of the mold 46 is set, for example, in the range of 80 ° or more and less than 90 °, preferably in the range of 85 ° to 88 °. When the angle α is smaller than the above range, when the mold 46 is detached from the molding main body 62, the molding main body 62 is damaged at the connection portion with the fastener member 10, or the fastener member 10 collides with the longitudinal side wall 50 and the fastener The member 10 tends to separate from the molding main body 62. On the other hand, if the angle α is 90 ° or more, the elastic biasing force exerted on the base portion 16 of the fastener member 10 toward the second portion 44b of the support concave portion 44 cannot be obtained.
[0035]
The opening 58 of the second portion 44b of the support recess 44 may have a transverse dimension W2 substantially equal to or slightly greater than the transverse dimension w2 of the base 16 of the fastener member 10. In this case, due to the elastic biasing action of each thin extension 26 of the fastener member 10, the region near the base end of each thin extension 26 coupled to the base 16 comes into close contact with the shelf wall 54 of the support recess 44. However, it is also possible to correct the warpage and the deflection of the base 16 by this. Further, the longitudinal dimension D1 of the first portion 44a of the support recess 44 can be set slightly larger than the longitudinal dimension d of the base 16 of the fastener member 10, as shown in FIG. This facilitates the operation of inserting the fastener member 10 into the support recess 44 while elastically deforming each thin extension 26.
[0036]
The fastener member 10 having the above configuration is used, for example, when the cover member 104 made of cloth or leather is attached to the surface of the cushion member 102 made of a foamed resin material in the automobile seat 100 shown in FIG. It is particularly preferably used as a fixing means for the cover member 104. In this case, the fastener member 10 is fixedly connected to a predetermined position on the surface of the cushion member 102 when the cushion member 102 is formed by the above-described insert molding step. In such an application to the automobile seat 100, the fastener member 10 is arranged in a groove 106 provided at a predetermined position of the cushion member 102 as shown in FIG. It is desirable. For this purpose, in the mold 46 shown in FIG. 5, the protrusion height of the protrusion 64 provided at a predetermined height from the molding surface 42 for providing the support concave portion 44 may be further increased. However, depending on the application of the fastener member 10, the support recess 44 can be directly recessed in the molding surface 42 of the mold 46 without such a protrusion.
[0037]
In the above-described application to the automobile seat 100, a corresponding engagement element 108 that engages with the plurality of engagement elements 18 of the fastener member 10 is provided on the back surface (the contact surface with the cushion member 102) of the cover member 104. . The corresponding engagement element 108 is made of a loop material 110 sewn at a predetermined position on the back surface of the cover member 104, for example, as shown in FIG. Alternatively, as shown in FIG. 11B, the loop material 112 can be applied to the entire back surface of the cover member 104. In any case, the cover member 104 is partially bent and sewn to form a rib portion 114 as shown, and the loop members 110 and 112 disposed on the rib portion 114 are placed on the base 16 of the fastener member 10. By inserting between the two rows of the engaging elements 18 arranged in two rows, the engaging pieces 32 of each of the engaging elements 18 can easily engage with the loop members 110 and 112, and a strong fixing force can be obtained. This is advantageous (see FIG. 12).
[0038]
As described above, when the fastener member 10 is applied to the automobile seat 100, the base member 16 of the fastener member 10 connected to the cushion member 102 is held flat, and the fastener member 10 is attached to the corresponding engagement element 108 of the cover member 104. Can be accurately engaged with each other, and the cover member 104 is firmly fixed to the cushion member 102. In addition, since the tactile sensation and appearance of the cover member 104 are not slightly impaired at the portion where the cover member 104 is fixed to the cushion member 102, it is possible to provide a high level of comfort and high quality to the occupant. Can be.
[0039]
The fastener member for insert molding according to the present invention can have various shapes and dimensions.
For example, in the above-described embodiment, the base 16 of the fastener member 10 is as small as possible so as not to impair the tactile sensation and appearance of the adherend, as long as the adhesion strength of the adherend and the adhesion to the molding body are not reduced. Therefore, it is in the form of an elongated strip having a longitudinal dimension greater than the transverse dimension. The longitudinal dimension d of the base 16 is, for example, 50 mm to 500 mm. The transverse dimension w2 of the base 16 is, for example, 3 mm to 30 mm, and preferably 4 mm to 10 mm. If these dimensions d and w2 are smaller than the above ranges, it will be difficult to firmly adhere the adherend, and if larger than the above ranges, the warp or deflection of the base 16 tends to be more remarkable as the correction becomes more difficult. Further, the thickness t1 (distance between the main surface 12 and the back surface 14) of the base 16 is, for example, 0.5 mm to 5 mm, and preferably 1 mm to 3 mm. If the thickness t1 is smaller than the above range, the warp and deflection of the base 16 become more difficult to correct, and if the thickness t1 is larger than the above range, the feel and appearance of the adherend tend to be impaired.
[0040]
The thin extension 26 of the base 16 is advantageously provided along substantially the entire length of the first edge 22 of the base 16 in order to reliably correct the warpage and deflection of the base 16 throughout. The transverse dimension e of the thin extension 26 is, for example, 1 mm to 10 mm, preferably 1.2 mm to 3 mm. If the transverse dimension e is smaller than the above range, the elastic deformation of the thin extension 26 becomes difficult, and the function of correcting the warpage of the base 16 is reduced. If the transverse direction dimension e is larger than the above range, the elastic biasing force to the base 16 is reduced. Or the arrangement in the support recess 44 tends to be difficult. The thickness t2 of the thin extension 26 is, for example, 0.2 mm to 3 mm, and preferably 0.3 mm to 1 mm. If the thickness t2 is smaller than the above range, the elastic urging force to the base 16 is reduced, and the elastic member is damaged at the time of being disposed in the support concave portion 44. If the thickness t2 is larger than the above range, it is difficult to elastically deform the thin extension 26. Accordingly, the function of correcting the warpage of the base 16 tends to decrease.
[0041]
As shown in FIG. 13, the thin extension 26 of the base 16 has a free end 26a extending in a sawtooth shape in the longitudinal direction to facilitate the placement of the base 16 in the support recess 44 of the mold 46 in the insert molding process. Can be provided. Alternatively, the thin extension 26 may include a free end 26a having a sinusoidal or rectangular wave shape. According to such a configuration, the contact length between the free end 26a of the thin extension 26 and the longitudinally inclined side wall 50 of the support recess 44 is reduced as compared with the embodiment of FIG. The force required to insert the base 16 is reduced. This effect is more advantageous as the longitudinal dimension of the base 16 increases, and reduces the labor burden on the operator. In this case, it is desired to determine the shape of the thin extension 26 within a range in which the function of correcting the warpage of the base 16 does not deteriorate due to a decrease in the elastic biasing force on the base 16.
[0042]
Further, the base 16 may be provided with a thin elastically deformable thin extension (not shown) having a smaller thickness than the base 16 also on the pair of second edges 24 extending in the transverse direction. The thin extension is extended in the longitudinal direction from the second edge 24 over substantially the entire length of the second edge 24, so that the thin extension 26 of the first edge 22 is formed in the insert molding step in the same manner as the thin extension 26. The base 16 is elastically deformed when the base 16 is inserted into the support recessed portion 46, and the action of correcting the warpage of the base 16 and bringing the region near the periphery of the base main surface 12 into close contact with the shelf wall 54 is promoted.
[0043]
The engaging element 18 may have a mushroom shape having a hemispherical, spherical, conical or cap-like head, a hook shape, a loop shape, or an umbrella, in addition to the protrusion having an arrowhead-like head shown in FIG. It can have a variety of protrusions, such as shapes, palm trees, and the like. Alternatively, as the engagement element, a combination structure of a tongue and a groove, or a group of conical or frusto-conical engagable tapered struts as disclosed in US Pat. No. 4,875,259. It can also be applied. For example, in the engagement element 18 having an arrowhead as shown in FIGS. 1 and 14, the protruding height h1 from the base main surface 12 is, for example, 1 mm to 8 mm, preferably 3 mm to 6 mm. If the height h1 is smaller than the above range, the engagement function of the engagement element 18 is reduced. If the height h1 is larger than the above range, the touch feeling and appearance of the adherend tend to be impaired. The distance r between the tips of the opposing engaging pieces 32 of the engaging element 18 is, for example, 0.5 mm to 2 mm, the thickness s of the leg 30 is, for example, 0.5 mm to 2 mm, and the length h2 of the leg 30 is , For example, 1 mm to 5 mm. Further, the standing density of the engaging elements 18 on the base main surface 12 is, for example, 10 / cm. 2 ~ 100 / cm 2 , Preferably 25 / cm 2 ~ 60 / cm 2 It is.
[0044]
The plurality of engagement elements 18 are not limited to the two-row staggered arrangement along the longitudinal direction on the base 16 as shown in FIG. 3, but may be a parallel arrangement in which the rows overlap each other in the transverse direction. . In addition, both the staggered arrangement and the parallel arrangement can be arranged in three or more rows along the longitudinal direction. In this way, if the arrangement of the plurality of engagement elements is appropriately selected, the insert molding fastener member according to the present invention and the mating member may be arranged at only one or a plurality of relative rotation positions in a face-to-face state. Mutual engagement of the two members may also be possible. By the way, the fastener member 10 is desirably manufactured by an injection molding process in order to reduce the warpage and the bending of the base 16 generated at the time of molding as much as possible. In this case, in a parallel arrangement of two or more rows, It becomes difficult to remove the mold. In such a case, the base, engagement elements, and connection may be made by an injection molding process using a destructively removable mold, such as the leg mold disclosed in U.S. Patent No. 5,242,646. Advantageously, the element is integrally formed from a resin material.
[0045]
It should be noted that the fastener member according to the present invention is only the one in which the base and the engaging element are integrally formed from the same resin material (known as “Super Dual Lock” (trade name of 3M Company)). In addition, for example, those having a plastic base and an engaging element formed of a plurality of resin monofilaments implanted in the base (also known as “dual lock” (trade name of 3M Company)) Applicable. Further, as the engaging element, a hook or a loop used in a hook and loop type fastener (known as “Scotch Mate” (trade name of 3M Company)) can be adopted.
[0046]
The connecting element 20 includes a longitudinal portion 34 and a transverse portion 36 to resist the separating action that acts to roll the base 16 transversely or longitudinally from the forming body and to increase the torsional rigidity of the base 16. Is preferred. In this case, the connecting element 20 is not limited to the shape of the meandering ridge shown in FIG. 3. For example, the meandering ridge 20 a composed of only the longitudinal portion 34 and the transverse portion 36 in FIG. Shapes such as a separated meandering ridge 20b having a groove in the longitudinal portion 34 and a separated T-shaped ridge 20c in FIG. 15C can be adopted. Each of these shapes facilitates detachment of the mold at the time of molding of the fastener member 10, and removes the resin stock solution mainly at the time of insert molding, while expelling air in the transverse direction of the base, at every corner of the surface of the connecting element 20. Since the fastener member 10 can be easily spread, the connection strength between the fastener member 10 and the molding main body can be improved.
[0047]
The projecting height c of the connecting element 20 from the base rear surface 14 is, for example, 1 mm to 20 mm. Further, in the wedge-shaped connection element 20 of FIG. 1 for improving the connection strength between the fastener member 10 and the forming main body, the angle formed between the base back surface 14 and the inclined side surface of the connection element 20 is, for example, 5 ° to 30 °. . Furthermore, in order to further improve the connection strength between the fastener member 10 and the molding main body, in addition to the connection element 20, a secondary connection element (not shown) having, for example, a protrusion similar to the engagement element 18 is selected. Can also be added. The connection strength with respect to the pull-out force acting on the base 16 in the vertical direction is, for example, 5 kg or more, and the connection strength with respect to the peeling force acting to roll up the base 16 from the first edge 22 is, for example, 2 kg or more. (In each case, the dimensions of the base 16 are d = 50 cm and w2 = 8 mm).
[0048]
By the way, as described above, the connecting element 20 of the fastener member 10 of FIG. 1 has the longitudinal portion 34 and the transverse portion 36 extending in a meandering manner, and thus has the effect of increasing the rigidity of the base 16 against twisting. At the same time, it has been found that the meandering connecting element 20 exhibits high rigidity against bending of the base 16 in a direction parallel to the main surface 12 (hereinafter referred to as a horizontal direction). Therefore, the fastener member 10 is suitable for use in which the base member 16 is connected to the forming main body in a state where the base portion 16 is bent in a horizontal direction. Have difficulty. Such an application is, for example, in a bucket seat type automobile seat having a three-dimensional shape along the occupant's body shape, a fastener member is formed along a curved seam of a cover member three-dimensionally sewn in accordance with a cushion shape. Is arranged. Figures 16-18 show some alternative embodiments of the coupling element that allow for the application of fastener members in such cases.
[0049]
The connecting element 70 according to the modified embodiment shown in FIG. 16 is integrally formed from the same resin material as the base 16, and is formed of a ridge provided on the back surface 14 so as to be linearly continuous in the longitudinal direction of the base 16. The ridge includes a thin plate-like leg 72 that is joined at a base end to a substantially center of the back surface 14 in the transverse direction. The legs 72 have a substantially uniform thickness (dimension in the transverse direction) as a whole, and are arranged substantially upright along a center line extending in the longitudinal direction of the back surface 14. Further, at the free end of the leg 72 away from the back surface 14, a thin plate-like anchor portion 74 extending substantially parallel to the base 16 is formed on both sides in the transverse direction of the leg 72. The anchor portion 74 has a substantially uniform thickness as a whole, and has a transverse dimension substantially equal to the transverse dimension w1 of the base portion 16 and the thin extension portions 26 combined.
[0050]
In the connecting element 70 having such a configuration, the base portion 16 and the anchor portion 74, which are balanced in material strength, are connected to each other at a predetermined interval by the leg portions 72, so that when the base portion 16 is bent in the horizontal direction. Then, stress is applied to the base portion 16 and the anchor portion 74 in a substantially evenly distributed manner. Moreover, the leg 72 itself does not prevent the base 16 from bending in the horizontal direction. As a result, the base 16 can be easily bent in the horizontal direction without being twisted or bent in a wave shape. Therefore, the fastener member provided with the connecting element 70 can be easily insert-molded into the curved groove of the cushion member, for example, in an automobile seat of a bucket seat type, and furthermore, the corresponding engagement of the curved seam of the three-dimensional sewing cover member. The cover member is brought into close contact with the cushion member by firmly engaging with the element, and the functionality and design can be improved. In addition, regardless of the shape of the main body of the molding, the fastener member can be flexibly installed at a position where it does not touch or rarely touch a human body (for example, a seated person). Sufficient zipper function can be exhibited without impairing the tactile sensation. When the connecting element 70 is embedded in the main body of the molding by the insert molding process, it goes without saying that the anchor portion 74 bites into the main body of the molding in a wedge shape to exert a strong connecting force.
[0051]
The connecting element 70 is formed when the transverse dimension w1 of the base 16 and the two thin extension portions 26, the height p of the base 16 and the connecting element 70, and the transverse dimension y of the anchor portion 74 are substantially equal to each other. In particular, the bending of the base 16 in the horizontal direction is facilitated. In this case, if the leg portions 72 are shifted inward with respect to the bending radius (that is, the H-shaped cross section in FIG. 16B is corrected to the U-shaped cross section), the bending becomes easier. However, with such a configuration, there is a problem that the operator has to place the leg 72 in the mold while checking the position of the leg 72 during insert molding. Also, in consideration of the S-shaped meandering bending in the horizontal direction, it is preferable to dispose the leg 72 substantially at the center in the transverse direction of the back surface 14 as shown in the figure.
[0052]
In the connecting element 70, as shown in FIG. 16A, a plurality of slits 76 can be provided in the anchor portion 74 at predetermined intervals in the longitudinal direction. According to such a configuration, at the time of insert molding, the molding main body is solidified in a state of entering the slit 76 of the anchor portion 74, so that the coupling force for coupling the fastener member to the molding main body can be further increased. In particular, the slits 76 allow the anchor portion 74 to be firmly attached to the forming main body by invading the forming main body, thereby resisting a separating force acting to roll up the base 16 from the forming main body in the longitudinal direction from the second edge 24 thereof. Acts to hook on. From such a viewpoint, at least one slit 76 may be provided adjacent to the second edge 24 which may be a starting point of turning the base 16 in the longitudinal direction.
[0053]
The slit 76 further serves to facilitate bending the base 16 in a direction perpendicular to the main surface 12 (hereinafter, referred to as a vertical direction) so as to make the main surface 12 concave. By this action, the fastener member provided with the connecting element 70 can be installed on various three-dimensional curved portions of the surface of the cushion member of the vehicle seat, and the fixing portion of the cover member can be set at a desired position. There is an advantage that the degree of freedom is increased. From such a viewpoint, it is advantageous to increase the number of the slits 76 and to form the slits 76 in the leg 72 continuously. However, in this case, the effect of balancing and dispersing the stress when bending the base 16 in the horizontal direction is weakened, and the bending in the horizontal direction tends to be difficult. Therefore, it is desirable to select the shape and the number of the slits 76 according to the required bending direction.
[0054]
The longitudinal dimension x of the slit 76 is desirably as small as possible from the viewpoint of facilitating bending in the horizontal direction. However, if x is too small, it becomes difficult to penetrate the molding body, and There is a fear that the resistance to the separating action acting to roll up from the forming main body in the direction decreases. Therefore, it is preferable that the slit 76 has a shape such that x is as small as possible at the portion adjacent to the leg portion 72 as shown in the figure, and gradually expands toward the tip of the anchor portion 74.
[0055]
The connecting element 80 according to the modified embodiment shown in FIG. 17 is integrally formed from the same resin material as the base 16, and includes a ridge provided on the rear surface 14 so as to extend linearly and continuously in the longitudinal direction of the base 16. The ridge includes a thin plate-shaped leg portion 82 that is connected to the rear surface 14 at the base thereof at substantially the center in the transverse direction. The leg portion 82 has a thickness (transverse dimension) that gradually increases from the base end connected to the back surface 14 to the free end at the distal end, and a region having the maximum transverse dimension of the free end is the anchor portion 84. Works.
[0056]
The connecting element 80 is provided with an anchor portion 84 having a transverse dimension larger than the base end of the connection with the back surface 14 at the free end at the distal end remote from the back surface 14, so that the connecting element 80 is similar to the connecting element 70 of FIG. The stress when bending the base 16 in the horizontal direction can be dispersedly applied to the base 16 and the anchor portion 74, and as a result, the base 16 can be easily bent in the horizontal direction. However, in the connecting element 80, the maximum transverse dimension q of the anchor portion 84, that is, the leg portion 82 is smaller than the transverse dimension w 1 of the base portion 16 and the thin extension portions 26. Is less effective in facilitating bending in the horizontal direction.
[0057]
In the connecting element 80, a plurality of through holes 86 penetrating the leg 82 in the transverse direction can be provided at predetermined intervals in the longitudinal direction near the free end of the leg 82. According to such a configuration, at the time of insert molding, the molding main body is solidified in a state of entering the through-hole 86, so that the coupling force for coupling the fastener member to the molding main body can be further increased. In particular, the through-hole 86 allows the leg portion 82 to be formed into the main body by invading the main body, thereby resisting a separating force acting to roll up the base 16 from the main body in the longitudinal direction with the second edge 24 as a starting point. It acts to firmly lock. It is desirable that the size of the through hole 86 be determined in a range that does not significantly reduce the mechanical strength of the leg 82.
[0058]
As an example, preferred dimensions in each of the above-described modified embodiments when assuming that the base 16 is bent in the horizontal direction with a radius of curvature of 100 mm or more are listed below. The thickness t1 of the base 16 is 0.5 mm to 3 mm. The transverse dimension w1 of the base 16 and the two thin extension portions 26 is 4 mm to 20 mm. The height p of the base 16 and the connecting element 70 (80) combined is 4 mm to 20 mm. Maximum transverse dimension q of the leg 72 (82) = 0.5 mm to 5 mm. The thickness s of the anchor 74 is 0.5 mm to 3 mm. The transverse dimension y of the anchor part 74 is 2.5 mm to 20 mm. The maximum longitudinal dimension x of the slit 76 is 0.5 mm to 5 mm. The maximum longitudinal dimension z of the anchor part 74 divided by the slit 76 is 5 mm to 50 mm. The number of slits 76 (per 10 cm in the longitudinal direction) = 1 to 20. When the free end 26a of the thin extension portion 26 is formed in a wavy or sawtooth shape in the same dimensional range as described above, the base 16 can be bent in the horizontal direction with a radius of curvature of 50 mm or more.
[0059]
Since the fastener member according to the present invention is band-shaped, as discussed in the above description, the separation force acting to roll up the base in the longitudinal direction from the forming main body starting from the second edge thereof after insert-molding the forming main body. It is desired that the base can be firmly hooked to the molding main body against the above. In order to provide such a function, for example, in each of the embodiments shown in FIGS. 1, 16 and 17, only the base 16 is extended in the longitudinal direction near the second edge 24 as shown in FIG. Can be. In this case, the supporting recess 44 is provided at a position at a predetermined height from the molding surface 42 of the main mold 46, and the transverse wall 52 (FIG. 6) that defines the supporting recess 44 is omitted, and the shelf wall 54 is replaced with the supporting recess. The fastener member is arranged on the mold 46 in a state where the fastener member is extended to the outside of the support recess 44 while the longitudinal extension 16a of the base 16 is supported by the shelf wall 54 as shown in FIG. a)). When insert molding is performed in this state, as shown in FIG. 18B, the longitudinal extension 16a of the base 16 is embedded in the molding main body 62, so that the base 16 is molded in the longitudinal direction starting from the second edge 24 thereof. The base 16 is firmly hooked on the forming main body 62 against the separating force acting to lift the main body 62 from the main body 62.
[0060]
Further, the fastener member according to the present invention includes a fastener member in which two or more fastener members (referred to as a single fastener member for convenience) described in the above embodiments are connected in the longitudinal direction by two or more. . Such a coupled fastener member is formed by connecting a plurality of unitary fastener members to each other by a flexible connecting element (joint) having a transverse dimension smaller than the transverse dimension of the base, and is preferably formed integrally. Is done. Therefore, when attaching a plurality of single fastener members to a plurality of relatively close locations on the molding main body, the coupling type fastener member has an effect of facilitating the positioning of each single fastener member and improving workability.
[0061]
Preferably, the coupling element is integrally molded to the base with the same thickness from the same material as the base and connects the bases to each other. By providing a transverse dimension smaller than the base, a coupling element of such a configuration can be more easily flexed than the base. Alternatively, a wire or a thin band made of a flexible metal material such as a wire may be used as the coupling element, and may be integrally incorporated into each single fastener member by an insert molding method. Further, the coupling element may be embedded in the molding main body when the coupling type fastener member is insert-molded in the molding main body, but the coupling element itself is also provided with the coupling element described above, and the coupling element is formed by the coupling element. A configuration that is fixedly connected to the main body is preferable. The relative arrangement of the individual fastener members on the molding body is arbitrary, but in consideration of workability, the longitudinal dimension of the coupling element is preferably set in the range of 5 mm to 100 mm.
[0062]
The fastener member according to the present invention can be formed from various materials. In particular, in order to exert an appropriate urging force on the base by elastic deformation of the thin extension of the base, the bending elastic modulus of the thin extension is preferably 9800 N / cm. 2 ~ 245000 N / cm 2 And particularly preferably 49000 N / cm 2 ~ 196000 N / cm 2 It is required to be within the range. In order to achieve such a flexural modulus, polyamide (6-nylon (trademark), 6,6-nylon (trademark) or the like), polypropylene, polyethylene, ionomer, polyacetal, polyester ( Polyethylene terephthalate, polyethylene naphthalate, etc.), polyphenylene sulfide, polyether ketone, polyether ester, polyether sulfone, polyether imide, polysulfone, and polyarylate. Among these, particularly preferred materials are 6-nylon (trademark), 6,6-nylon (trademark), and polypropylene.
[0063]
Further, a filler such as carbon black, glass fiber, titanium oxide, iron oxide or the like can be added to such a resin material to control the flexural modulus in a suitable range. A particularly preferred filler is carbon black. In this case, the content of carbon black is preferably 0.01 to 10 parts by weight, particularly preferably 1 to 5 parts by weight, based on 100 parts by weight of the resin. If the content of carbon black is less than this range, the control of the elastic modulus tends to be difficult, and if it is more than this range, the lubricating effect by carbon black becomes remarkable, and the connection strength for connecting the fastener member to the molding main body decreases. Tend to.
[0064]
In the above-described application to the automobile seat 100, the cushion member 102 is, for example, a mixture of a polyol such as polypropylene glycol, a polyisocyanate such as tolylene diisocyanate, a foaming agent such as an aqueous amine solution, and a curing accelerator. Molded from a foamable resin material made of This mixture is usually stirred and mixed immediately before use, and then poured into a mold. After the injection, a foaming / curing operation is performed at a temperature of 25 ° C to 180 ° C to cure the mixture. On the other hand, the loop height of the corresponding engagement element 108 provided on the cover member 104 is, for example, 1 mm to 10 mm, and preferably 3 mm to 4 mm.
[0065]
【The invention's effect】
As is apparent from the above description, according to the present invention, since the warpage or bending of the base of the fastener member when the insert is arranged in the mold can be reliably corrected, the engagement function of the engagement element can be reduced. In addition, the fastener member can be firmly fixed at a predetermined position of the forming main body without impairing the feel and appearance of the adherend. Further, according to the present invention, it is possible to easily and fixedly connect such a fastener member for insert molding to a molding main body.
[Brief description of the drawings]
FIG. 1 is a partially enlarged perspective view of a fastener member according to an embodiment of the present invention.
FIG. 2 is a front view of the fastener member of FIG.
FIG. 3 is a plan view of the fastener member of FIG. 1;
FIG. 4 is a transverse sectional view taken along line IV-IV of FIG. 3;
FIG. 5 is a transverse sectional view showing a state where the fastener member of FIG. 1 is arranged as an insert in a mold.
FIG. 6 is a longitudinal sectional view showing a state where the fastener member of FIG. 1 is arranged as an insert in a mold.
FIG. 7 is a transverse sectional view showing a state in which a stock resin solution is injected into the mold of FIG. 6;
FIG. 8 is a cross-sectional view in a transverse direction of a molding main body in which a fastener member is fixed to a surface by an insert molding process.
FIG. 9 is a perspective view of an automobile seat to which the fastener member according to the present invention can be applied.
FIG. 10 is a partially enlarged sectional view taken along line XX of FIG. 9;
FIG. 11 is a view showing a corresponding engagement element of the adherend engaged with the fastener member according to the present invention, and (a) a partially enlarged perspective view of the back surface of the adherend when a local loop member is used; b) is a partially enlarged perspective view of the adherend when the entire surface loop member is used.
FIG. 12 is an enlarged sectional view showing a fastener member engaged with a corresponding engagement element of an adherend.
FIG. 13 is a plan view showing a modified embodiment of the thin extension.
FIG. 14 is a partially enlarged sectional view showing an engagement element of the fastener member of FIG.
FIGS. 15A to 15C are partially enlarged bottom views showing a modification of the connecting element of the fastener member of FIG.
FIG. 16 is a view showing a modified embodiment of the connecting element, in which (a) is a partially enlarged perspective view of a fastener member, and (b) is a cross-sectional view taken along line XVI-XVI.
FIG. 17 is a view showing another modified embodiment of the connecting element, in which (a) is a partially enlarged perspective view of a fastener member, and (b) is a cross-sectional view taken along line XVII-XVII.
FIG. 18 is a view showing a modified embodiment of the base, in which (a) a longitudinal cross-sectional view of a fastener member arranged in a mold of a forming main body, and (b) a longitudinal cross-sectional view of a fastener member insert-molded in a forming main body. ,.
[Explanation of symbols]
10 ... fastener members
16 ... Base
18 ... engagement element
20, 70, 80 ... connecting element
22 First edge
24 ... second edge
26 ... Thin extension
34 ... Long part
36 ... crossing part
44 ... Support recess
46 ... type
50 ... long side wall
54 ... shelf wall
62: Molding subject
72, 82 ... legs
74, 84 ... anchor part
102 ... Cushion member
104 ... Cover member

Claims (6)

主要面及び該主要面の反対側の裏面を有する略平坦な帯形状の基部と、該基部の該主要面に設けられる複数の係合要素と、該基部の該裏面に設けられる連結要素とを具備し、インサート成形工程により、成形主体に埋め込まれる該連結要素を介して、該成形主体の表面に該係合要素を露出させた状態で該成形主体に固定的に連結されるインサート成形用ファスナー部材において、
前記基部は、長手方向へ延びる一対の第１縁と該第１縁より短く横断方向へ延びる一対の第２縁とを備え、それら第１縁には、該基部より小さな厚みを有した弾性変形可能な薄肉延長部が、該第１縁の略全長に亙って前記横断方向へそれぞれ延設されることを特徴とするインサート成形用ファスナー部材。A substantially flat band-shaped base having a main surface and a back surface opposite to the main surface, a plurality of engagement elements provided on the main surface of the base, and a connection element provided on the back surface of the base. A fastener for insert molding, which is fixedly connected to the molding main body in a state where the engaging element is exposed on the surface of the molding main body via the connecting element embedded in the molding main body in the insert molding process In the member,
The base includes a pair of first edges extending in a longitudinal direction and a pair of second edges shorter than the first edge and extending in a transverse direction, and the first edges have an elastic deformation having a smaller thickness than the base. A fastener member for insert molding, characterized in that possible thin extensions extend in each of said transverse directions over substantially the entire length of said first edge. 前記基部の前記一対の第２縁に、該基部より小さな厚みを有した弾性変形可能な薄肉延長部が、該第２縁の略全長に亙って前記長手方向へそれぞれ延設される請求項１に記載のインサート成形用ファスナー部材。An elastically deformable thin extension having a smaller thickness than the base and extending in the longitudinal direction over substantially the entire length of the second edge, at the pair of second edges of the base. 2. The fastener member for insert molding according to 1. 前記連結要素が、前記基部の前記長手方向に延びる長手部分と前記横断方向に延びる横断部分とを交互に備えて該長手方向へ蛇行状に連続して前記裏面に突設される突条からなる請求項１又は２に記載のインサート成形用ファスナー部材。The connecting element comprises a ridge which is provided with the longitudinal portion extending in the longitudinal direction and the transverse portion extending in the transverse direction of the base alternately, and which is continuously provided in a meandering manner in the longitudinal direction on the rear surface. The fastener member for insert molding according to claim 1. 前記突条の少なくとも一部分が、前記裏面との結合基端から先端の自由端へ向かって徐々に拡幅する形状を有する請求項３に記載のインサート成形用ファスナー部材。The fastener member for insert molding according to claim 3, wherein at least a portion of the ridge has a shape that gradually widens from a base end connected to the back surface to a free end at the front end. 前記連結要素が、前記基部の前記長手方向へ直線状に連続して前記裏面に突設される突条からなり、該突条が、該裏面から離れた自由端に、該裏面との結合基端よりも大きな横断方向寸法を有したアンカー部を備える請求項１又は２に記載のインサート成形用ファスナー部材。The connecting element comprises a ridge that is linearly and continuously protruding from the back surface in the longitudinal direction of the base, and the ridge is provided at a free end remote from the back surface with a coupling base with the back surface. The fastener member for insert molding according to claim 1 or 2, further comprising an anchor portion having a transverse dimension larger than an end. 請求項１に記載のインサート成形用ファスナー部材を成形主体の表面に前記係合要素を露出させた状態で固定的に連結する方法であって、
ａ）前記ファスナー部材の前記基部を受容支持する第１部分と前記複数の係合要素を収容する第２部分とを備え、該第１部分が、成形空間を画成する成形面の所定位置に開口する蟻溝形状を有し、該蟻溝を画成する一対の対向傾斜側壁の間の最大間隔が前記ファスナー部材の前記基部と前記薄肉延長部との合計横断方向寸法よりも小さく、該第２部分が該蟻溝の底部に凹設されて該第２部分の開口を囲繞する略平坦な環状棚壁が該第１部分に形成されてなるファスナー部材支持凹部を備えた成形主体の型を用意し、
ｂ）前記ファスナー部材の前記複数の係合要素を前記支持凹部の前記第２部分に挿入するとともに、前記基部の前記薄肉延長部の各々の自由端を前記支持凹部の前記一対の傾斜側壁にそれぞれ当接してそれら薄肉延長部を弾性変形させつつ該基部を前記第１部分に収容し、
ｃ）前記薄肉延長部の弾性復元力により前記ファスナー部材の前記基部を前記支持凹部内で前記第２部分に向けて付勢し、それにより該基部の前記主要面の周縁領域を該支持凹部の前記棚壁に密接させて該基部の撓曲を修正し、
ｄ）前記型の前記成形空間に樹脂原液を注入して、前記支持凹部の前記第１部分に配置された前記ファスナー部材の前記連結要素を該樹脂原液に没入させ、その状態で該樹脂原液を固化させて成形主体を成形し、
ｅ）前記成形主体及び該成形主体に連結された前記ファスナー部材から前記型を脱離する、
各ステップを有したことを特徴とする方法。A method of fixedly connecting the fastener member for insert molding according to claim 1 in a state where the engaging element is exposed on a surface of a molding main body,
a) a first portion for receiving and supporting the base of the fastener member; and a second portion for accommodating the plurality of engagement elements, the first portion being located at a predetermined position on a molding surface defining a molding space. The fastener has a dovetail shape that is open, and a maximum distance between a pair of opposed inclined side walls that define the dovetail groove is smaller than a total transverse dimension of the base and the thin extension of the fastener member. A mold having a fastener member supporting recess having two portions recessed at the bottom of the dovetail groove and having a substantially flat annular shelf wall surrounding the opening of the second portion formed in the first portion; Prepare,
b) inserting the plurality of engagement elements of the fastener member into the second portion of the support recess, and each free end of the thin extension of the base to the pair of inclined side walls of the support recess; The base portion is accommodated in the first portion while the thin extension portions are elastically deformed in contact with each other,
c) the base of the fastener member is urged toward the second portion within the support recess by the elastic restoring force of the thin extension, whereby the peripheral region of the main surface of the base is urged by the support recess. Correct the bending of the base by bringing it close to the shelf wall,
d) Injecting the undiluted resin solution into the molding space of the mold to immerse the connecting element of the fastener member arranged in the first portion of the support recess into the undiluted resin solution. Solidify to form the main body,
e) removing the mold from the molding body and the fastener member connected to the molding body;
A method comprising the steps of:
JP18772096A 1995-12-22 1996-07-17 Insert molding fastener member and method of connecting the insert molding fastener member to a molding body Expired - Fee Related JP3554112B2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP18772096A JP3554112B2 (en) 1995-12-22 1996-07-17 Insert molding fastener member and method of connecting the insert molding fastener member to a molding body
DE19651675A DE19651675A1 (en) 1995-12-22 1996-12-12 Longitudinal inserted fastening section for pressure-injection mould
AU33938/97A AU3393897A (en) 1996-07-17 1997-06-18 Fastener member used as insert and method for connecting such fastener member with molded object
PCT/US1997/010338 WO1998002331A1 (en) 1996-07-17 1997-06-18 Fastener member used as insert and method for connecting such fastener member with molded object
CN97196408A CN1082465C (en) 1996-07-17 1997-06-18 Fastener member used as insert and method for connecting such fastener member with molded object
DE69707682T DE69707682T2 (en) 1996-07-17 1997-06-18 Velcro tape can be used as an insert element and method for connecting such a Velcro tape to an insert molding
EP97930007A EP0912364B1 (en) 1996-07-17 1997-06-18 Fastener member for use as an insert and method for connecting such a fastener member with a molded object
KR1019997000233A KR20000023766A (en) 1996-07-17 1999-01-14 Fastener member used as insert and method for connecting such fastener member with molded object

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JP2002165617A (en) * 2000-11-28 2002-06-11 Three M Innovative Properties Co Fastener positioning member and fastener with positioning function
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JP5779941B2 (en) * 2011-03-30 2015-09-16 株式会社ブリヂストン Foamed synthetic resin molded body and method for producing the same
KR101979821B1 (en) * 2012-09-14 2019-05-20 송위현 Fastener having improved adhesiveness
JP6192283B2 (en) 2012-10-11 2017-09-06 スリーエム イノベイティブ プロパティズ カンパニー Fastener parts
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US9474338B2 (en) * 2013-10-11 2016-10-25 Aplix Fastener
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