【０００１】
【発明の属する技術分野】
本発明は、湯水混合栓や単水栓などの水栓器具における吐水管の先端部に装着され、例えば整流器や飛沫防止器などの射出調整器を簡単に据え付けるための水栓用吐水口金具に関する。
詳しくは、水栓の吐水管先端に刻設された外ネジ部に、吐水口キャップの内周面に刻設された内ネジ部をねじ込んで接続する水栓用吐水口金具に関する。
【０００２】
【従来の技術】
従来、この種の水栓用吐水口金具として、吐水管の先端に刻設された外ネジ部（おねじ部）に対し、金属製の機械加工部品か又は合成樹脂製の成形品である吐水口キャップ（短筒状ケース）の内周面に刻設された内ネジ部（取付け用めねじ部）をねじ込んで接続すると共に、この吐水口キャップ（短筒状ケース）の内部に、複数の多孔板からなる整流器を装着したものがある（例えば、特許文献１参照）。
また、吐水管の先端に断熱性のある合成樹脂製の断熱キャップが装着され、この断熱キャップに一体形成された樹脂製外ネジ部（ネジ部）に対し、吐水口キャップ（整流キャップ）の内周面に刻設された内ネジ部をねじ込んで接続するか、又は上記樹脂製外ネジ部の破損を防止するため、断熱キャップに金属製の接続部材を螺着してそれに金属製外ネジ部（おねじ部）を一体形成すると共に、この金属製外ネジ部に対し、吐水口キャップ（整流キャップ）の内ネジ部をねじ込んで接続するものがある（例えば、特許文献２参照）。
【０００３】
【特許文献１】
特開平１０−１５９１４２号公報（第２頁、図１）
【特許文献２】
特開２０００−２９１０８８号公報（第２頁、図２−５）
【０００４】
【発明が解決しようとする課題】
しかし乍ら、このような従来の水栓用吐水口金具では、金属製の機械加工部品か又は合成樹脂製の成形品である吐水口キャップを使用するため、吐水口キャップが金属製の機械加工部品である場合には、寸法精度良く加工するには手間がかかるばかりでなく、その表面にサビ防止用のメッキ処理する必要があって、その分だけ製造コストが高価になると共に、吐水口キャップの重量が重いために取り扱い難いという問題がある。
更に、例えば吐水管の先端や断熱キャップなどに刻設される外ネジ部は、そのピッチや形状などのネジ仕様がメーカー毎に異なるのが一般的であり、これらの総てに対応するには、複数種類の異なるネジ仕様に螺合する専用の吐水口キャップを個別に製造して夫々在庫管理する必要があってコスト高になるという問題がある。
特に吐水口キャップの全体を構成する金属は一般に熱伝導率が大きいため、高温水を通した場合には、その熱が吐水口キャップの表面まで素早く伝わって表面温度が上昇するため、火傷する恐れがあるという問題がある。
また、吐水口キャップが合成樹脂製の成形品である場合には、上述した金属製加工部品の問題を解決するものの、これに比べて外観が劣るため、その表面をメッキする必要がある。
しかし、このものはメッキ可能な合成樹脂が限定される上、表面硬度が低いため、表面が傷付き易くて商品価値が低下し易いと共に、金属製加工部品に比べメッキが剥がれ易くて、手を傷付けたり髪の毛が引っ掛かるという問題がある。
【０００５】
本発明のうち請求項１記載の発明は、吐水口キャップの表面硬度を高めて傷付き防止しながら軽量化すると共に、複数のネジ仕様に対して樹脂成形品を交換するだけで対応可能することを目的としたものである。
請求項２記載の発明は、請求項１に記載の発明の目的に加えて、ケガ防止して安全性を向上させながら変形し難くすることを目的としたものである。
請求項３記載の発明は、請求項１または２に記載の発明の目的に加えて、耐久性に優れた廻り止め手段を提供することを目的としたものである。
請求項４記載の発明は、請求項１または２に記載の発明の目的に加えて、更に耐久性に優れた廻り止め手段を提供することを目的としたものである。
【０００６】
【課題を解決するための手段】
前述した目的を達成するために、本発明のうち請求項１記載の発明は、吐水口キャップＡを、内周面に吐水管Ｓ先端の外ネジ部Ｓ１と螺合する内ネジ部１ａが刻設された合成樹脂製の成形品１と、この樹脂成形品１の外周に嵌挿される金属製のプレス加工品２とで構成し、このプレス加工品２の内側に樹脂成形品１が嵌挿された状態でプレス加工品２の端部を折り曲げ加工して、抜け止め用の係止突部２ａ，２ｂを樹脂成形品１に向け突出するように形成すると共に、これら樹脂成形品１とプレス加工品２とに亘って、両者を周方向へ一体化するための廻り止め手段３を形成したことを特徴とするものである。
ここで、プレス加工品２を耐食性に優れてしかも研磨により表面から光沢が出る金属で成形することが好ましい。
請求項２記載の発明は、請求項１記載の発明の構成に、前記係止突部２ａ，２ｂが、プレス加工品２の端部を樹脂成形品１へ向けてカシメ加工するか、或いはプレス加工品２の端部を断面略円弧形状にカール加工した構成を加えたことを特徴とする。
請求項３記載の発明は、請求項１または２記載の発明の構成に、前記廻り止め手段３が、樹脂成形品１の端面部１ｂ及びそれと対向するプレス加工品２の端部との対向部分に亘って、相互に周方向へ嵌合する係合部３ａ，３ｂを形成した構成を加えたことを特徴とする。
請求項４記載の発明は、請求項１または２記載の発明の構成に、前記廻り止め手段３が、樹脂成形品１の外周面及びそれと対向するプレス加工品２の内周面に亘って夫々相互に嵌合するように形成した係合部３ａ″，３ｂ″である構成を加えたことを特徴とする。
【０００７】
【作用】
請求項１の発明は、吐水口キャップＡの内側に位置する合成樹脂製の成形品１の外周に金属製のプレス加工品２を嵌挿し、この嵌挿状態でプレス加工品２の端部を折り曲げ加工して、樹脂成形品１に向け突出する係止突部２ａ，２ｂを形成することにより、樹脂成形品１が抜け止めされると共に、これら樹脂成形品１とプレス加工品２とに亘って廻り止め手段３を形成することにより、両者が周方向へ一体化されて吐水管Ｓ先端の外ネジ部Ｓ１への締め付けが可能となるものである。
請求項２の発明は、請求項１記載の発明の作用に加えて、プレス加工品２の端部を樹脂成形品１へ向けて折り曲げ加工するか、或いは断面略円弧形状にカール加工することにより、プレス加工品２の切断端面が露出しないと共にプレス加工品２の強度アップとなる。
請求項３の発明は、請求項１または２記載の発明の作用に加えて、樹脂成形品１の端面部１ｂに形成された係合部３ａ，３ａ′と、プレス加工品２の端部に形成された係合部３ｂ，３ｂ′とを相互に周方向へ嵌合させることにより、両係合部３ａ，３ｂ，３ａ′，３ｂ′が周方向へ一体化されて吐水管Ｓ先端の外ネジ部Ｓ１への締め付けが可能となる。
請求項４の発明は、請求項１または２記載の発明の作用に加えて、樹脂成形品１の外周面に形成された係合部３ａ″と、プレス加工品２の内周面に形成された係合部３ｂ″とを相互に嵌合させることにより、両者が周方向へ一体化されて吐水管Ｓ先端の外ネジ部Ｓ１への締め付けが可能となる。
【０００８】
【発明の実施の形態】
以下、本発明の実施例を図面に基づいて説明する。
この実施例は、図１（ａ）（ｂ）及び図２に示す如く、水栓の吐水管Ｓ先端に刻設された外ネジ部Ｓ１が、該吐水管Ｓの先端に装着した合成樹脂製の断熱キャップＳ２に固着される筒状金具Ｓ３にしたネジ部であるか、又は該断熱キャップＳ２に一体形成されるネジ部であると共に、この外ネジ部Ｓ１にねじ込んで接続する吐水口キャップＡが、その内部にステンレスなどの金属で成形された複数枚の多孔板からなる整流器Ｂを収納した整流キャップである場合を示すものである。
【０００９】
上記吐水口キャップＡは、その内周面に上記吐水管Ｓ先端の外ネジ部Ｓ１と螺合する内ネジ部１ａが刻設された合成樹脂製の成形品１と、この樹脂成形品１の外周に嵌挿される金属製のプレス加工品２とで構成される。
なお、吐水管Ｓ先端の外ネジ部Ｓ１のネジ仕様が異なる場合には、それらに螺合する内ネジ部１ａが刻設された複数の樹脂成形品１を予め製造する必要がある。
【００１０】
上記樹脂成形品１は、例えばポリアセタール樹脂などの合成樹脂で円筒状に形成され、その一端側内周面に内ネジ部１ａを刻設すると共に、その外径を後述するプレス加工品２の内径とほぼ同じか又はそれより若干小さく成形して、図２に示す如くプレス加工品２の両開口部の少なくともどちらか一方から該樹脂成形品１を出し入れ自在にしている。
【００１１】
本実施例の場合には、樹脂成形品１の吐水管Ｓ側内周面（図示例では上端側内周面）のみに内ネジ部１ａが刻設され、それと反対側の端面部（図示例では底面部）１ｂには、上記多孔板からなる整流器Ｂが流出しないように複数の貫通孔１ｃを貫通開穿して移動不能に支持すると共に、上記吐水管Ｓ先端の外ネジ部Ｓ１との間には、環状パッキンＣを介装するための段部１ｄを形成している。
【００１２】
上記プレス加工品２は、耐食性に優れてしかも研磨により表面から光沢が出る金属で管状に成形され、その材料としては耐食性と加工性の容易さから例えばステンレスなどを使用することが好ましく、その内部に樹脂成形品１を挿入した状態で、プレス加工品２の両端部を折り曲げ加工して、抜け止め用の係止突部２ａ，２ｂが樹脂成形品１に向け内側へ突出するように形成される。
【００１３】
本実施例の場合には、図２に示す如く樹脂成形品１が嵌挿される前の時点で、プレス加工品２の他端部（図示例では下端部）を樹脂成形品１へ向け断面直角にカシメ加工して係止突部２ａが予め成形され、プレス加工品２の一端開口部（図示例では上端開口部）から樹脂成形品１を嵌挿した後に、上記プレス加工品２の一端部（図示例では上端部）を樹脂成形品１へ向け断面直角にカシメ加工して係止突部２ｂが形成され、これら係止突部２ａ，２ｂの間に樹脂成形品１を挟み込んでいる。
【００１４】
そして、これら樹脂成形品１とプレス加工品２とに亘って、両者を周方向へ一体化するための廻り止め手段３が形成される。
本実施例の場合には、この廻り止め手段３が、樹脂成形品１の端面部１ｂ及びそれと対向するプレス加工品２の端部との対向部分に亘って、相互に周方向へ嵌合する係合部３ａ，３ｂを、プレス加工品２の表面に凹凸が発生しないように形成している。
【００１５】
図示例の場合には図１（ｂ）に示す如く、樹脂成形品１の底面部１ｂ外周面と、プレス加工品２の下端部を断面直角に折り曲げ加工した係止突部２ａの切断端面に亘って、底面クランク状に嵌合する凸状の係合部３ａ…及び凹状の係合部３ｂ…を夫々周方向へ交互に形成することにより、プレス加工品２内に樹脂成形品１が軸方向へ嵌挿された状態で、これら係合部３ａ…，３ｂ…を周方向へ回転不能に嵌合させて空回り不能にしている。
【００１６】
更に図示例では、上記係合部３ａ，３ｂの個数を８個ずつ形成したが、これに限定されず、それ以下でもそれ以上でも良く、また吐水口キャップＡの完成状態で、樹脂成形品１の端面部（底面部）１ｂをプレス加工品２の下端部より下方へ若干突出させているが、これに限定されず、これらをほぼ面一状に配置しても良い。
【００１７】
次に、斯かる水栓用吐水口金具の作用について説明する。
先ず、吐水口キャップＡの内側に位置する樹脂成形品１の外周に金属製のプレス加工品２を嵌挿し、この嵌挿状態でプレス加工品２の両端部を折り曲げ加工して、樹脂成形品１に向け突出する係止突部２ａ，２ｂが形成されると共に、これら樹脂成形品１とプレス加工品２とに亘って廻り止め手段３が形成される。
【００１８】
それにより、樹脂成形品１が抜け止めされて吐水口キャップＡが完成すると共に、樹脂成形品１とプレス加工品２が周方向へ一体化されて吐水管Ｓ先端の外ネジ部Ｓ１への締め付けが可能となる。
その結果、プレス加工品２により吐水口キャップＡの表面硬度を高めて傷付きを防止しながら軽量化できると共に、吐水管Ｓ先端の外ネジ部Ｓ１のネジ仕様が異なったとしても、それらに螺合する内ネジ部１ａが刻設された複数の樹脂成形品１を予め製造しておけば、樹脂成形品１を交換するだけで対応可能となる。
【００１９】
特に、プレス加工品２を耐食性に優れてしかも研磨により表面から光沢が出る金属で成形すれば、サビ防止用のメッキ処理が不要となると共に、プレス加工品２の表面が傷付いたとしても腐食せず、その結果、吐水口キャップＡの製造コストを更に低減すると共にサビの発生による外観の低下を防止できるという利点もある。
【００２０】
更に本実施例の場合には、プレス加工品２の両端部を樹脂成形品１へ向け断面直角にカシメ加工して、係止突部２ａ，２ｂを形成することにより、プレス加工品２の切断端面が露出しないと共にプレス加工品２の強度アップとなる。
その結果、プレス加工品２の切断端面に指などが触れないからケガを防止できて安全性が向上すると共にプレス加工品２の全体が変形し難くなるという利点がある。
【００２１】
また廻り止め手段３を構成する樹脂成形品１の端面部（底面部）１ｂに形成された係合部３ａ…と、プレス加工品２の端部（下端部）に形成された係合部３ｂ…とを相互に周方向へ嵌合させることにより、プレス加工品２の表面に凹凸が発生することなく、両係合部３ａ…，３ｂ…が周方向へ一体化されて吐水管Ｓ先端の外ネジ部Ｓ１への締め付けが可能となる。
その結果、耐久性に優れた廻り止め手段３を提供できる。
また、プレス加工品２の表面に凹凸が発生しないように係合部３ａ，３ｂを形成可能であるから、吐水口キャップＡの表面に水垢などの汚れが付着するのを防止できるという利点もある。
【００２２】
一方、図３（ａ）及び図３（ｂ）に示すものと、図４（ａ）、図４（ｂ）、図４（ｃ）（ｄ）及び図４（ｅ）に示すものは、夫々が本発明の他の実施例であり、図３（ａ）（ｂ）はプレス加工品２の一端部に形成された係止突部２ａの変形例を示しており、図４（ａ）〜（ｅ）は廻り止め手段３の変形例を示している。
【００２３】
図３（ａ）に示すものは、前記プレス加工品２の一端部（図示例では上端部）を断面略円弧形状に丸めてカール加工することにより、抜け止め用の係止突部２ｂ′を内側へ突出するように形成した構成が、前記図１（ａ）（ｂ）及び図２に示した実施例とは異なり、それ以外の構成は図１（ａ）（ｂ）及び図２に示した実施例と同じものである。
従って、図３（ａ）に示すものは、前記図１（ａ）（ｂ）及び図２に示した実施例と同様な作用効果が得られる。
【００２４】
図３（ｂ）に示すものは、プレス加工品２の一端部（図示例では上端部）を断面直角より小さい角度にカシメ加工することにより、抜け止め用の係止突部２ｂ″を内側へ突出するように形成した構成が、前記図１（ａ）（ｂ）及び図２に示した実施例とは異なり、それ以外の構成は図１（ａ）（ｂ）及び図２に示した実施例と同じものである。
従って、図３（ｂ）に示すものは、プレス加工品２の切断端面が露出するものの、樹脂成形品１の抜け止め及びプレス加工品２の強度アップは十分に期待できる。
【００２５】
図４（ａ）に示すものは、前記樹脂成形品１の底面部１ｂ外周面と、プレス加工品２の下端部を断面直角に折り曲げ加工した係止突部２ａの切断端面に亘って、底面円弧状に嵌合する凸状の係合部３ａ…及び凹状の係合部３ｂ…を夫々周方向へ等間隔毎に形成した構成が、前記図１（ａ）（ｂ）及び図２に示した実施例とは異なり、図４（ｂ）に示すものは、樹脂成形品１の底面部１ｂ外周面と、プレス加工品２の下端部を断面直角に折り曲げ加工した係止突部２ａの切断端面に亘って、底面Ｖ字形に嵌合する凸状の係合部３ａ…及び凹状の係合部３ｂ…を夫々周方向へ等間隔毎に形成したした構成が、前記図１（ａ）（ｂ）及び図２に示した実施例とは異なり、それ以外の構成は図１（ａ）（ｂ）及び図２に示した実施例と同じものである。
【００２６】
更に図４（ｃ）（ｄ）に示すものは、前記樹脂成形品１の端面部１ｂに凹状の係合部３ａ′…を周方向へ等間隔毎に凹設し、プレス加工品２の下端部を断面直角に折り曲げ加工した係止突部２ａの切断端面に凸状の係合部３ｂ′…を周方向へ等間隔毎に突設し、これら凸状の係合部３ｂ′…を折り曲げて凹状の係合部３ａ′…内に嵌入させた構成が、前記図１（ａ）（ｂ）及び図２に示した実施例とは異なり、それ以外の構成は図１（ａ）（ｂ）及び図２に示した実施例と同じものである。
【００２７】
従って、図４（ａ）、図４（ｂ）、図４（ｃ）（ｄ）に示すものは、前記図１（ａ）（ｂ）及び図２に示した実施例と同様な作用効果が得られ、しかもプレス加工品２の表面に凹凸が発生しないから、吐水口キャップＡの表面に水垢などの汚れが付着するのを防止できるという利点もある。
【００２８】
また図４（ｅ）に示すものは、前記樹脂成形品１の外周面に挿入方向へ延びる凸状の係合部３ａ″…を周方向へ等間隔毎に突設し、プレス加工品２の内周面に挿入方向へ延びる凹状の係合部３ｂ″…を周方向へ等間隔毎に凹設し、プレス加工品２内に樹脂成形品１が軸方向へ嵌挿された状態で、これら係合部３ａ″…，３ｂ…″を周方向へ回転不能に嵌合させて空回り不能にした構成が、前記図１（ａ）（ｂ）及び図２に示した実施例とは異なり、それ以外の構成は図１（ａ）（ｂ）及び図２に示した実施例と同じものである。
【００２９】
従って、図４（ｅ）に示すものは、係合部３ａ″…，３ｂ…″の嵌合面積が拡大されるので、更に耐久性に優れた廻り止め手段３を提供できるという利点がある。
【００３０】
尚、前示実施例では、吐水管Ｓの先端に装着した合成樹脂製の断熱キャップＳ２に一体形成される外ネジ部か、又は断熱キャップＳ２に固着した筒状金具Ｓ３に刻設した外ネジ部Ｓ１に対し、吐水口キャップＡの内ネジ部１ａをねじ込んで接続する場合を示したが、これに限定されず、例えば特開平１０−１５９１４２号公報に開示されるような吐水管の先端に直接刻設した外ネジ部に対し、吐水口キャップＡの内ネジ部１ａをねじ込んで接続しても良い。
【００３１】
更に、吐水口キャップＡが、その内部に複数枚の多孔板からなる整流器Ｂを収納した整流キャップである場合を示したが、これも限定されず、例えば飛沫防止器などの射出調整器を備えるなど、他の構造であっても良い。
【００３２】
また、前記廻り止め手段３が、樹脂成形品１の端面部１ｂとプレス加工品２の下端部との対向部分に亘って相互に嵌合するように形成した係合部３ａ，３ｂである場合を示したが、これに限定されず、これに代えて樹脂成形品１の外周面とプレス加工品２の内周面との間に充填して硬化させた耐熱性接着剤であったり、プレス加工品２に対する樹脂成形品１の機械的な圧入であったり、プレス加工品２の内周面に沿って樹脂成形品１をインサート成形したものであっても良い。
これらの場合には、プレス加工品２の表面に凹凸が発生しないので、プレス加工品１と樹脂成形品２の連結を容易にしながら吐水口キャップＡの外観が優れて表面に水垢などの汚れが付着するのを防止できるという利点がある。
【００３３】
【発明の効果】
以上説明したように、本発明のうち請求項１記載の発明は、吐水口キャップＡの内側に位置する合成樹脂製の成形品１の外周に金属製のプレス加工品２を嵌挿し、この嵌挿状態でプレス加工品２の端部を折り曲げ加工して、樹脂成形品１に向け突出する係止突部２ａ，２ｂを形成することにより、樹脂成形品１が抜け止めされると共に、これら樹脂成形品１とプレス加工品２とに亘って廻り止め手段３を形成することにより、両者が周方向へ一体化されて吐水管Ｓ先端の外ネジ部Ｓ１への締め付けが可能となるので、吐水口キャップＡの表面硬度を高めて傷付き防止しながら軽量化すると共に、複数のネジ仕様に対して樹脂成形品１を交換するだけで対応できる。
従って、金属製の機械加工部品である吐水口キャップを使用した従来のものに比べ、吐水口キャップＡの大量生産が容易となって寸法精度良く加工するのに手間がかからず、製造コストを大幅に低減できると共に、吐水口キャップＡの軽量に伴って取り扱いが容易となり、しかも例えばメーカー毎に吐水管Ｓの先端や断熱キャップなどに刻設される外ネジ部Ｓ１のネジ仕様が異なったとしても、プレス加工品２を共通部品化できるため、複数種類の異なるネジ仕様に螺合する専用の吐水口キャップを個別に製造して夫々在庫管理する必要があるものに比べコスト安となり、その結果、これらが相俟って水栓用吐水口金具の機能を低下させることなく全体の価格を大幅に低減できる。
更に、樹脂成形品１を挟んで外表面のプレス加工品２が配置されるので、吐水口キャップＡの全体が金属製の機械加工部品であるものに比べ、高温水を通してもその熱が樹脂成形品１により断熱されて、吐水口キャップＡの表面温度が上昇せず、火傷の発生を完全に防止できる。
特に、プレス加工品２を耐食性に優れてしかも研磨により表面から光沢が出る金属で成形すれば、サビ防止用のメッキ処理が不要となると共に、プレス加工品２の表面が傷付いたとしても腐食せず、その結果、吐水口キャップＡの製造コストを更に低減すると共にサビの発生による外観の低下を防止でき、表面がメッキされた合成樹脂製の成形品である吐水口キャップを使用した従来のものに比べて、使用可能な合成樹脂がメッキ可能なものに限定されず、表面が傷付き難くなって商品価値が向上するだけでなく、メッキの剥離による手の傷付きや髪の毛の引っ掛かりなども防止できる。
【００３４】
請求項２の発明は、請求項１の発明の効果に加えて、プレス加工品２の端部を樹脂成形品１へ向けて折り曲げ加工するか、或いは断面略円弧形状にカール加工することにより、プレス加工品２の切断端面が露出しないと共にプレス加工品２の強度アップとなるので、ケガ防止して安全性を向上させながら変形し難くすることができる。
【００３５】
請求項３の発明は、請求項１または２の発明の効果に加えて、樹脂成形品１の端面部１ｂに形成された係合部３ａ，３ａ′と、プレス加工品２の端部に形成された係合部３ｂ，３ｂ′とを相互に周方向へ嵌合させることにより、両係合部３ａ，３ｂ，３ａ′，３ｂ′が周方向へ一体化されて吐水管Ｓ先端の外ネジ部Ｓ１への締め付けが可能となるので、耐久性に優れた廻り止め手段３を提供できる。
また、プレス加工品２の表面に凹凸が発生しないように係合部３ａ，３ｂを形成可能であるから、吐水口キャップＡの表面に水垢などの汚れが付着するのを防止できる。
【００３６】
請求項４の発明は、請求項１または２の発明の効果に加えて、樹脂成形品１の外周面に形成された係合部３ａ″と、プレス加工品２の内周面に形成された係合部３ｂ″とを相互に嵌合させることにより、両者が周方向へ一体化されて吐水管Ｓ先端の外ネジ部Ｓ１への締め付けが可能となるので、更に耐久性に優れた廻り止め手段３を提供できる。
【図面の簡単な説明】
【図１】（ａ）は本発明の一実施例を示す水栓用吐水口金具の一部切欠正面図、（ｂ）は同底面図である。
【図２】分解状態を縮小して示す縦断正面図である。
【図３】（ａ）（ｂ）は本発明の他の実施例を示す水栓用吐水口金具の一部切欠正面図である。
【図４】（ａ）（ｂ）（ｃ）（ｅ）は本発明の他の実施例を示す水栓用吐水口金具の縮小底面図であり、（ｄ）は（ｃ）の一部切欠正面図である。
【符号の説明】
Ａ 吐水口キャップ Ｓ 水栓の吐水管
Ｓ１ 外ネジ部 １ 合成樹脂製の成形品、樹脂成形品
１ａ 内ネジ部 １ｂ 端面部（底面部）
２ 金属製のプレス加工品 ２ａ，２ｂ 係止突部
３ 廻り止め手段
３ａ，３ｂ，，３ａ′，３ｂ′，３ａ″，３ｂ″ 係合部[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a faucet fitting for a faucet, which is attached to a distal end of a faucet pipe in a faucet device such as a hot water mixing faucet or a single faucet, and for easily installing an injection adjuster such as a rectifier or a splash arrester. .
More specifically, the present invention relates to a faucet spout fitting for screwing an inner thread portion engraved on an inner peripheral surface of a spout cap into an outer thread portion engraved at the tip of a spout pipe of a faucet.
[0002]
[Prior art]
Conventionally, as a faucet spout of this type, a spout that is a metal machined part or a synthetic resin molded part is attached to an outer thread part (male thread part) engraved at the tip of a spout pipe. An internal thread (female for attachment) engraved on the inner peripheral surface of the water outlet cap (short cylindrical case) is screwed in and connected, and a plurality of water outlet caps (short cylindrical case) are There is one equipped with a rectifier made of a perforated plate (for example, see Patent Document 1).
In addition, a heat insulating cap made of synthetic resin having heat insulating properties is attached to the end of the water discharge pipe, and a resin outer screw part (screw part) integrally formed with the heat insulating cap is fitted with a water discharge cap (rectifying cap). An internal thread portion engraved on the peripheral surface is screwed in for connection, or a metal connection member is screwed to a heat insulating cap to prevent damage to the resin external thread portion, and a metal external thread portion is attached thereto. There is one in which a (male thread) is integrally formed and an inner thread of a water outlet cap (rectifying cap) is screwed into the metal outer thread (see, for example, Patent Document 2).
[0003]
[Patent Document 1]
JP-A-10-159142 (page 2, FIG. 1)
[Patent Document 2]
JP-A-2000-291088 (page 2, FIG. 2-5)
[0004]
[Problems to be solved by the invention]
However, in such a conventional water faucet for faucet, since the water faucet cap which is a metal machined part or a synthetic resin molded product is used, the water faucet cap is made of a metal machined part. In the case of parts, not only is it troublesome to process with high dimensional accuracy, but also the surface must be plated to prevent rust, which increases the manufacturing cost and increases the spout cap. There is a problem that it is difficult to handle because of its heavy weight.
Furthermore, for example, the external thread portion engraved on the tip of the water discharge pipe or the heat insulating cap, for example, generally has different thread specifications such as pitch and shape from manufacturer to manufacturer. However, there is a problem in that it is necessary to individually manufacture dedicated water outlet caps to be screwed to a plurality of different screw specifications and to manage the respective stocks, thereby increasing costs.
In particular, since the metal that constitutes the entire spout cap generally has high thermal conductivity, when high-temperature water is passed, the heat is quickly transmitted to the surface of the spout cap and the surface temperature rises, which may cause burns. There is a problem that there is.
When the water outlet cap is a molded product made of synthetic resin, it solves the above-mentioned problem of the metal processed part, but its appearance is inferior to this, so that its surface needs to be plated.
However, these materials are limited in synthetic resin that can be plated, and have a low surface hardness, so that the surface is easily damaged and the commercial value is easily reduced, and the plating is easily peeled off compared to metal processed parts. There is a problem that the hair is scratched or the hair is caught.
[0005]
The invention according to claim 1 of the present invention increases the surface hardness of the water outlet cap to reduce the weight while preventing damage, and can cope with a plurality of screw specifications only by replacing a resin molded product. It is intended for.
The invention described in claim 2 has the object of preventing damage and preventing deformation while improving safety, in addition to the object of the invention described in claim 1.
A third aspect of the present invention has an object to provide, in addition to the object of the first or second aspect of the invention, a detent means having excellent durability.
A fourth aspect of the present invention is to provide a rotation-stopping means having more excellent durability in addition to the object of the first or second aspect of the present invention.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is characterized in that the water outlet cap A is provided with an inner threaded portion 1a screwed on the inner peripheral surface with the outer threaded portion S1 at the tip of the water discharge pipe S. A synthetic resin molded product 1 is provided, and a metal pressed product 2 inserted into the outer periphery of the resin molded product 1. The resin molded product 1 is inserted into the press processed product 2. In this state, the end of the press-formed product 2 is bent to form retaining projections 2a and 2b for retaining the protrusions toward the resin molded product 1, and the resin molded product 1 and the press are formed. A feature of the present invention is that a rotation preventing means 3 is formed over the workpiece 2 so as to integrate the two in the circumferential direction.
Here, it is preferable that the pressed product 2 is formed of a metal having excellent corrosion resistance and having a glossy surface from polishing.
According to a second aspect of the present invention, in the configuration of the first aspect, the locking projections 2a and 2b are formed by caulking or pressing the end of the pressed product 2 toward the resin molded product 1. It is characterized by adding a configuration in which the end of the processed product 2 is curled into a substantially arc-shaped cross section.
According to a third aspect of the present invention, in the configuration of the first or second aspect, the rotation-stopping means 3 is a portion facing the end face 1b of the resin molded product 1 and the end of the pressed product 2 facing the same. , A feature in which engagement portions 3a and 3b that fit each other in the circumferential direction are formed.
According to a fourth aspect of the present invention, in the configuration of the first or second aspect, the detent means 3 extends over the outer peripheral surface of the resin molded product 1 and the inner peripheral surface of the pressed product 2 opposed thereto. It is characterized in that a configuration in which engagement portions 3a "and 3b" are formed so as to be fitted to each other is added.
[0007]
[Action]
According to the first aspect of the invention, a metal press-formed product 2 is inserted around the outer periphery of a synthetic resin-made product 1 located inside the water outlet cap A, and the end of the press-processed product 2 is inserted in this fitted state. By forming the locking projections 2a and 2b projecting toward the resin molded product 1 by bending, the resin molded product 1 is prevented from coming off, and the resin molded product 1 and the press processed product 2 are covered. By forming the rotation stopping means 3, the both are integrated in the circumferential direction, so that the distal end of the water discharge pipe S can be fastened to the external thread portion S1.
According to a second aspect of the present invention, in addition to the operation of the first aspect, the end of the press-formed product 2 is bent toward the resin molded product 1 or curled into a substantially arc-shaped cross section. In addition, the cut end surface of the pressed product 2 is not exposed, and the strength of the pressed product 2 is increased.
The invention according to claim 3 is characterized in that, in addition to the effects of the invention according to claim 1 or 2, the engaging portions 3a and 3a 'formed on the end face portion 1b of the resin molded product 1 and the end of the pressed product 2 are provided. By engaging the formed engaging portions 3b, 3b 'with each other in the circumferential direction, the two engaging portions 3a, 3b, 3a', 3b 'are integrated in the circumferential direction, so that the outer portions of the water discharge pipe S end. Fastening to the screw portion S1 becomes possible.
A fourth aspect of the present invention provides, in addition to the operation of the first or second aspect, an engaging portion 3a "formed on the outer peripheral surface of the resin molded product 1 and an inner peripheral surface of the pressed product 2. By fitting the engaging portions 3b ″ to each other, the two are integrated in the circumferential direction, so that the distal end of the water discharge pipe S can be fastened to the external thread portion S1.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In this embodiment, as shown in FIGS. 1A and 1B and FIG. 2, an external thread portion S1 formed at the tip of the water discharge pipe S of the faucet is made of a synthetic resin attached to the tip of the water discharge pipe S. The water outlet cap A is a threaded portion formed into a cylindrical fitting S3 fixed to the heat insulating cap S2, or a threaded portion integrally formed with the heat insulating cap S2, and screwed and connected to the external threaded portion S1. Is a rectifying cap in which a rectifier B including a plurality of perforated plates formed of a metal such as stainless steel is accommodated.
[0009]
The spout cap A is formed of a synthetic resin molded article 1 having an inner threaded portion 1a which is screwed into the outer threaded portion S1 at the tip of the spout pipe S on the inner peripheral surface thereof. And a metal press-formed product 2 fitted around the outer periphery.
When the thread specifications of the outer thread S1 at the tip of the water discharge pipe S are different, it is necessary to manufacture a plurality of resin molded products 1 in which the inner thread 1a to be screwed with them is engraved in advance.
[0010]
The resin molded article 1 is formed of a synthetic resin such as polyacetal resin into a cylindrical shape, and has an inner threaded portion 1a formed on an inner peripheral surface of one end thereof, and the outer diameter of the resin molded article 1 is changed to the inner diameter of a pressed product 2 described later. The resin molded product 1 is formed into a shape which is almost the same as or slightly smaller than that of the resin molded product 1 as shown in FIG.
[0011]
In the case of the present embodiment, the inner screw portion 1a is engraved only on the inner peripheral surface on the water discharge pipe S side (the inner peripheral surface on the upper end side in the illustrated example) of the resin molded product 1, and the opposite end surface portion (illustrated example in the illustrated example). In the bottom portion 1b, a plurality of through-holes 1c are penetrated so as not to flow out so that the rectifier B made of the perforated plate does not flow out. A step 1d for interposing the annular packing C is formed therebetween.
[0012]
The pressed product 2 is formed into a tubular shape with a metal having excellent corrosion resistance and having a glossy surface from polishing, and it is preferable to use, for example, stainless steel as the material from the viewpoint of corrosion resistance and ease of workability. In a state where the resin molded product 1 is inserted, the both ends of the press-formed product 2 are bent so that the locking projections 2a and 2b for retaining are formed so as to project inward toward the resin molded product 1. You.
[0013]
In the case of the present embodiment, the other end (the lower end in the illustrated example) of the press-formed product 2 faces the resin-formed product 1 at a right angle before the resin-formed product 1 is inserted as shown in FIG. The locking projection 2a is formed in advance by crimping, and after inserting the resin molded product 1 from one end opening (in the illustrated example, the upper end opening) of the pressed product 2, one end of the pressed product 2 is inserted. A locking projection 2b is formed by crimping the upper end (in the illustrated example) toward the resin molded product 1 at a right angle in cross section, and the resin molded product 1 is sandwiched between the locking projections 2a and 2b.
[0014]
Then, over the resin molded product 1 and the press-processed product 2, a detent means 3 for integrating the both in the circumferential direction is formed.
In the case of the present embodiment, the detent means 3 fits circumferentially with each other over the portion facing the end face 1b of the resin molded product 1 and the end of the pressed product 2 facing the same. The engaging portions 3a and 3b are formed so that no irregularities occur on the surface of the pressed product 2.
[0015]
In the case of the illustrated example, as shown in FIG. 1B, the outer peripheral surface of the bottom portion 1b of the resin molded product 1 and the cut end surface of the locking projection 2a formed by bending the lower end of the pressed product 2 at a right angle in cross section. By forming the convex engaging portions 3a ... and the concave engaging portions 3b ... fitting in the bottom crank shape alternately in the circumferential direction, the resin molded product 1 is formed in the pressed product 2 by the shaft. , 3b... Are fitted non-rotatably in the circumferential direction so that they cannot idle.
[0016]
Further, in the illustrated example, the number of the engaging portions 3a and 3b is eight each. However, the present invention is not limited to this, and the number may be smaller or larger. Although the end face (bottom face) 1b of the above is slightly protruded below the lower end of the press-formed product 2, the present invention is not limited to this, and they may be arranged substantially flush.
[0017]
Next, the operation of such a faucet spout will be described.
First, a metal press-formed product 2 is fitted around the outer periphery of the resin molded product 1 located inside the water discharge port cap A, and both ends of the press-formed product 2 are bent in this fitted state to form a resin molded product. The locking projections 2a and 2b protruding toward 1 are formed, and the detent means 3 is formed between the resin molded product 1 and the pressed product 2.
[0018]
As a result, the resin molded product 1 is prevented from coming off, and the water outlet cap A is completed, and the resin molded product 1 and the press-processed product 2 are integrated in the circumferential direction, and the distal end of the water discharge pipe S is fastened to the external thread portion S1. Becomes possible.
As a result, it is possible to increase the surface hardness of the water discharge port cap A by the press-processed product 2 and to reduce the weight while preventing scratches. If a plurality of resin molded products 1 in which the internal screw portions 1a to be combined are engraved are manufactured in advance, it is possible to cope only by exchanging the resin molded products 1.
[0019]
In particular, if the pressed product 2 is formed of a metal having excellent corrosion resistance and having a glossy surface due to polishing, plating for preventing rust is not required, and even if the surface of the pressed product 2 is damaged, corrosion occurs. As a result, there is an advantage that the manufacturing cost of the spout cap A can be further reduced and the appearance can be prevented from being deteriorated due to rust.
[0020]
Further, in the case of the present embodiment, both ends of the pressed product 2 are caulked at a right angle in cross section toward the resin molded product 1 to form the locking projections 2a and 2b. The end face is not exposed, and the strength of the pressed product 2 is increased.
As a result, there is an advantage that injuries can be prevented because a finger or the like does not touch the cut end surface of the pressed product 2, safety is improved, and the entire pressed product 2 is hardly deformed.
[0021]
An engaging portion 3a formed on an end portion (bottom portion) 1b of the resin molded product 1 constituting the rotation stopping means 3, and an engaging portion 3b formed on an end portion (lower end portion) of the pressed product 2 Are engaged with each other in the circumferential direction so that the engaging portions 3a, 3b are integrated in the circumferential direction without irregularities on the surface of the press-formed product 2, so that the front end of the water discharge pipe S is formed. Fastening to the outer screw portion S1 is enabled.
As a result, the anti-rotation means 3 having excellent durability can be provided.
Further, since the engaging portions 3a and 3b can be formed so as not to cause irregularities on the surface of the press-formed product 2, there is an advantage that dirt such as water scale can be prevented from adhering to the surface of the water outlet cap A. .
[0022]
On the other hand, those shown in FIGS. 3 (a) and 3 (b) and those shown in FIGS. 4 (a), 4 (b), 4 (c) (d) and 4 (e) are respectively 3A and 3B show another embodiment of the present invention. FIGS. 3A and 3B show modified examples of the locking projection 2a formed at one end of the press-formed product 2, and FIGS. (E) shows a modification of the rotation stopping means 3.
[0023]
FIG. 3A shows an example in which one end (upper end in the illustrated example) of the press-processed product 2 is rounded into a substantially arcuate cross-section and curled to form a locking projection 2b ′ for retaining. The configuration formed so as to protrude inward is different from the embodiment shown in FIGS. 1A and 1B, and the other configuration is shown in FIGS. 1A and 1B and FIG. This is the same as the embodiment described above.
Therefore, the embodiment shown in FIG. 3A can obtain the same operation and effect as those of the embodiment shown in FIGS. 1A and 1B and FIG.
[0024]
FIG. 3 (b) shows an example in which one end (upper end in the illustrated example) of the press-formed product 2 is caulked to an angle smaller than a right angle in cross section, so that the retaining projection 2b ″ for retaining is inward. The structure formed so as to protrude is different from the embodiment shown in FIGS. 1A and 1B and FIG. 2, and the other structures are the same as those shown in FIGS. 1A and 1B and FIG. It is the same as the example.
Therefore, in the case shown in FIG. 3B, although the cut end surface of the pressed product 2 is exposed, it is possible to sufficiently prevent the resin molded product 1 from coming off and to increase the strength of the pressed product 2.
[0025]
FIG. 4 (a) shows a bottom surface extending over the outer peripheral surface of the bottom surface 1b of the resin molded product 1 and the cut end surface of the locking projection 2a obtained by bending the lower end of the pressed product 2 at a right angle in cross section. 1 (a), (b) and FIG. 2 show a configuration in which convex engaging portions 3a and concave engaging portions 3b which fit in an arc shape are formed at regular intervals in the circumferential direction, respectively. 4 (b) shows the cutting of the locking projection 2a obtained by bending the outer peripheral surface of the bottom part 1b of the resin molded product 1 and the lower end of the pressed product 2 at a right angle in cross section. FIG. 1A shows a configuration in which convex engaging portions 3a and concave engaging portions 3b that fit in a V-shaped bottom surface are formed at equal intervals in the circumferential direction over the end surfaces. Unlike the embodiment shown in FIG. 1B and FIG. 2, the other configuration is the same as the embodiment shown in FIGS. 1A and 1B and FIG.
[0026]
4 (c) and 4 (d), a concave engaging portion 3a 'is provided at an end face portion 1b of the resin molded product 1 at regular intervals in a circumferential direction, and a lower end of the pressed product 2 is formed. Projecting engaging portions 3b 'are provided at equal intervals in the circumferential direction on the cut end surface of the locking projecting portion 2a which is bent at a right angle in cross section, and these convex engaging portions 3b' are bent. 1 (a) (b) and FIG. 2 are different from the embodiment shown in FIGS. 1 (a) and 1 (b), and the other configurations are shown in FIGS. 1 (a) and 1 (b). ) And the embodiment shown in FIG.
[0027]
Therefore, what is shown in FIGS. 4 (a), 4 (b), 4 (c) and 4 (d) has the same function and effect as the embodiment shown in FIGS. 1 (a), (b) and FIG. Since there is no unevenness on the surface of the pressed product 2, there is also an advantage that it is possible to prevent dirt such as water scale from adhering to the surface of the water outlet cap A.
[0028]
FIG. 4 (e) shows an example in which convex engaging portions 3a ″ extending in the insertion direction are provided on the outer peripheral surface of the resin molded product 1 at equal intervals in the circumferential direction. The concave engaging portions 3b ″ extending in the insertion direction are provided on the inner peripheral surface at regular intervals in the circumferential direction, and the resin molded product 1 is inserted into the pressed product 2 in the axial direction. Unlike the embodiment shown in FIGS. 1A and 1B, the engaging portions 3a "..., 3b. Structures other than the above are the same as those of the embodiment shown in FIGS. 1A and 1B and FIG.
[0029]
Therefore, the one shown in FIG. 4 (e) has an advantage that the fitting area of the engaging portions 3a "..., 3b.
[0030]
In the above-described embodiment, an external thread portion formed integrally with the heat insulating cap S2 made of synthetic resin attached to the tip of the water discharge pipe S, or an external screw carved on the cylindrical fitting S3 fixed to the heat insulating cap S2. Although the case where the inner screw portion 1a of the water outlet cap A is screwed into the portion S1 and connected is shown, the present invention is not limited to this, and for example, it may be connected to the tip of a water discharge pipe as disclosed in JP-A-10-159142. The inner thread portion 1a of the spout cap A may be screwed into the directly threaded outer thread portion for connection.
[0031]
Furthermore, although the case where the water outlet cap A is a rectifier cap in which the rectifier B composed of a plurality of perforated plates is housed has been shown, the present invention is not limited thereto, and includes an injection adjuster such as a splash preventer. For example, other structures may be used.
[0032]
In the case where the anti-rotation means 3 are engaging portions 3a and 3b formed so as to be fitted to each other over an opposing portion between the end face portion 1b of the resin molded product 1 and the lower end portion of the pressed product 2. However, the present invention is not limited to this. Alternatively, a heat-resistant adhesive filled and cured between the outer peripheral surface of the resin molded product 1 and the inner peripheral surface of the pressed product 2 may be used. The resin molded product 1 may be mechanically press-fitted into the processed product 2 or may be a product obtained by insert molding the resin molded product 1 along the inner peripheral surface of the pressed product 2.
In these cases, no irregularities are generated on the surface of the pressed product 2, so that the faucet cap A has an excellent appearance while facilitating the connection between the pressed product 1 and the resin molded product 2, and the surface is free from dirt such as scale. There is an advantage that adhesion can be prevented.
[0033]
【The invention's effect】
As described above, according to the first aspect of the present invention, a metal pressed product 2 is inserted around the outer periphery of a synthetic resin molded product 1 located inside the water outlet cap A, and this fitting is performed. By bending the end of the pressed product 2 in the inserted state to form the locking projections 2a and 2b projecting toward the resin molded product 1, the resin molded product 1 is prevented from coming off, and By forming the rotation stopping means 3 over the molded product 1 and the pressed product 2, the two are integrated in the circumferential direction and the distal end of the water discharge pipe S can be fastened to the external thread portion S 1. It is possible to increase the surface hardness of the water port cap A to reduce the weight while preventing scratches, and to cope with a plurality of screw specifications only by replacing the resin molded product 1.
Therefore, as compared with the conventional one using the water outlet cap which is a metal machined part, mass production of the water outlet cap A becomes easy, and it is not troublesome to process the water outlet cap A with high dimensional accuracy, and the manufacturing cost is reduced. It is possible to greatly reduce the size of the water spout cap A, and it becomes easy to handle with the light weight of the spout cap A. Further, for example, it is assumed that the screw specifications of the outer thread portion S1 engraved on the tip of the spout pipe S or the heat insulating cap are different for each manufacturer. Also, since the press-formed product 2 can be made into a common part, the cost is lower than that required to separately manufacture a dedicated spout cap to be screwed to a plurality of different screw specifications and manage each of them, and as a result, Together, these can greatly reduce the overall price without deteriorating the function of the faucet spout.
Furthermore, since the pressed product 2 on the outer surface is arranged with the resin molded product 1 interposed therebetween, the heat of the water discharge cap A is higher than that of a machined component made of metal even when hot water is passed therethrough. Insulated by the article 1, the surface temperature of the water outlet cap A does not rise, and the occurrence of burns can be completely prevented.
In particular, if the pressed product 2 is formed of a metal having excellent corrosion resistance and having a glossy surface due to polishing, a plating treatment for preventing rust is not required, and even if the surface of the pressed product 2 is damaged, corrosion occurs. As a result, as a result, the manufacturing cost of the water outlet cap A can be further reduced and the appearance can be prevented from being deteriorated due to the generation of rust, and a conventional water outlet cap using a synthetic resin molded product whose surface is plated is used. Compared to those that can be used, the usable synthetic resin is not limited to those that can be plated, the surface is hard to be scratched and the product value is improved, as well as the hand scratches due to peeling of the plating and the catch of hair etc. Can be prevented.
[0034]
According to the invention of claim 2, in addition to the effect of the invention of claim 1, by bending the end of the pressed product 2 toward the resin molded product 1, or by curling the cross-section into a substantially arc shape, Since the cut end surface of the press-formed product 2 is not exposed and the strength of the press-processed product 2 is increased, it is possible to prevent injuries, improve the safety, and make it difficult to deform.
[0035]
The invention according to claim 3 has, in addition to the effects of the invention according to claim 1 or 2, the engaging portions 3a and 3a 'formed on the end face portion 1b of the resin molded product 1 and the end portions of the pressed product 2. The engaging portions 3b, 3b 'are engaged with each other in the circumferential direction, so that the engaging portions 3a, 3b, 3a', 3b 'are integrated in the circumferential direction, and the outer screw at the tip of the water discharge pipe S is formed. Since the fastening to the portion S1 becomes possible, it is possible to provide the rotation stopping means 3 having excellent durability.
In addition, since the engaging portions 3a and 3b can be formed so as not to cause unevenness on the surface of the press-formed product 2, it is possible to prevent dirt such as scale from adhering to the surface of the water outlet cap A.
[0036]
According to the invention of claim 4, in addition to the effects of the invention of claim 1 or 2, the engaging portion 3a ″ formed on the outer peripheral surface of the resin molded product 1 and the inner peripheral surface of the pressed product 2 are formed. By fitting the engaging portion 3b ″ with each other, the two are integrated in the circumferential direction, and the distal end of the water discharge pipe S can be fastened to the external thread portion S1, so that the rotation stopper having more excellent durability is provided. Means 3 can be provided.
[Brief description of the drawings]
FIG. 1A is a partially cutaway front view of a faucet spout showing one embodiment of the present invention, and FIG. 1B is a bottom view thereof.
FIG. 2 is a longitudinal sectional front view showing the disassembled state in a reduced size.
3 (a) and 3 (b) are partially cutaway front views of a faucet spout according to another embodiment of the present invention.
4 (a), (b), (c) and (e) are reduced bottom views of a faucet spout according to another embodiment of the present invention, and (d) is a partially cutaway view of (c). It is a front view.
[Explanation of symbols]
A Water spout cap S Water faucet pipe S1 Outer thread part 1 Molded product made of synthetic resin, resin molded product 1a Inner threaded portion 1b End face (bottom face)
2 Pressed product made of metal 2a, 2b Locking projection 3 Detent means 3a, 3b, 3a ', 3b', 3a ", 3b" Engaging part