JP4121387B2

JP4121387B2 - Retractable assist grip

Info

Publication number: JP4121387B2
Application number: JP2003017525A
Authority: JP
Inventors: 弘志山本; 茂実高木
Original assignee: Daikyo Nishikawa Corp
Current assignee: Daikyo Nishikawa Corp
Priority date: 2003-01-27
Filing date: 2003-01-27
Publication date: 2008-07-23
Anticipated expiration: 2023-01-27
Also published as: JP2004224300A

Description

【０００１】
【発明の属する技術分野】
本発明は、不使用時に使用位置から格納位置に回動して格納される格納式アシストグリップに関し、特に、使用位置から格納位置への回動時に安定した制動トルクを簡単かつ安価な構造で付与するための技術分野に属する。
【０００２】
【従来の技術】
従来より、この種の格納式アシストグリップとして、車体パネル等の固定体に固定される１対の取付座と、これら取付座にそれぞれ脚部にて回動可能に軸支された長尺状のグリップ本体と、このグリップ本体を使用位置から格納位置に回動付勢するコイルばね等の回動付勢手段とを備えたものが知られている。
【０００３】
このようなアシストグリップにおいては、グリップ本体を格納位置から使用位置に回動させるときには、その操作を使用者（人）が行うが、この使用位置にあるグリップ本体を離すと、そのグリップ本体は回動付勢手段の付勢トルクにより使用位置から回動して格納位置に戻るようになっている。
【０００４】
その際、グリップ本体が使用位置から格納位置に回動するときにダンパにより制動トルク（抵抗）を与えれば、その制動によりグリップ本体が使用位置から格納位置にゆっくりと移動するので、グリップ本体が手を離した後に格納位置に急激に回動し、その格納位置で車体に強く当たって叩き音がするようなことはなく、望ましい高級感が得られる。
【０００５】
斯かるダンパを備えたものとして、従来、例えば特許文献１に示されるように、グリップ本体の脚部が支承軸を介して支持体に支持されたグリップにおいて、その支承軸を粘弾性的な樹脂材料からなる摩擦ブレーキに接触させ、グリップ本体が使用位置から格納位置に回動するときに摩擦ブレーキにより摺動抵抗を与えてその回動速度を下げるようにしたものが提案されている。
【０００６】
また、この他、グリップ本体の回動範囲全体に亘るダンパ効果を狙ったものではないが、特許文献２には、グリップ本体が格納位置にあるときに、取付座における軸の直径方向延長線上の対向面に対向する位置のグリップ本体にリテーナを取り付け、このリテーナ上にクッションゴムを貼り付けて、使用位置から格納位置に向かって回動したグリップ本体が格納位置近傍に近付くと、クッションゴムを取付座側の対向面に接触させて、グリップ本体が格納位置で急激に停止しようとする衝撃をクッションゴムで緩和することが提案されている。
【０００７】
さらに、上記ダンパとして高粘度の粘性剤が封入されたものを用い、この粘性ダンパをグリップ本体と取付座との間に一体的に組み込んだものも知られている（例えば特許文献３等参照）。
【０００８】
【特許文献１】
特開平５―９６９８２号公報
【特許文献２】
特開平７―１３７５６６号公報
【特許文献３】
特開２００１―５８５３５号公報
【０００９】
【発明が解決しようとする課題】
ところで、上記特許文献３のもののように粘性ダンパを用いた場合、グリップ本体の動きに高級感を持たせることができるものの、高粘度の粘性剤は比較的高価であり、しかも粘性剤のシールのために構造等を複雑にせざるを得ず、コストや構造の面で改良の余地がある。
【００１０】
これに対し、特許文献１のように、グリップの支承軸を粘弾性的な樹脂材料からなる摩擦ブレーキに接触させるようにした摩擦タイプのものでは、粘性剤を用いないので、安価に製造できるとともに、構造も簡単で済むが、その反面、粘弾性的な樹脂材料中に支承軸を挿通した構造であるので、その制動トルクの調整が難しく、安定した制動トルクが得られないという欠点がある。
【００１１】
本発明の目的は、上記の如き摩擦タイプの格納式アシストグリップにおけるダンパ構造を改良することにより、粘性剤を用いることなく簡単な構造の安価なダンパが得られるとともに、そのダンパにより安定した制動トルクが得られてアシストグリップの作動安定性の向上を図るようにすることにある。
【００１２】
【課題を解決するための手段】
上記の目的を達成すべく、この発明では、取付座側に軸方向に延びる凹部を形成して、この凹部内にスラスト部材を、その凹部外に位置する外端部がグリップ本体の脚部における収容部の一方の側壁に対向するように回転不能にかつ軸方向に移動可能に嵌入し、このスラスト部材の外端部とグリップ本体側の収容部の側壁との一方に溝深さが変化する周溝を、また他方に周溝内を移動するピン部をそれぞれ設けて、周溝底面とピン部とを圧接状態でグリップ本体の回動により相対的に摺接させて制動トルクを得るようにした。
【００１３】
具体的には、請求項１の発明では、固定体に固定される１対の取付座と、これら取付座にそれぞれ脚部にて回動可能に軸支された長尺状のグリップ本体と、このグリップ本体を使用位置から格納位置に回動付勢する回動付勢手段とを備えた格納式アシストグリップが前提である。
【００１４】
そして、上記脚部のうち上記グリップ本体が格納位置にあるときの上記固定体との対向面には、グリップ本体の長さ方向に対向する２つの側壁を有しかつ該グリップ本体の格納位置で上記取付座の一部を収容する収容部が切り欠いて形成されている。
【００１５】
また、上記１対の取付座のうちの少なくとも一方には、グリップ本体の長さ方向に延びる凹部を有する有底筒状の支持部が形成されていて、この凹部の開放口は上記収容部の２つの側壁のうちの一方の側壁側に、また底部は他方の側壁側にそれぞれ位置している。
【００１６】
上記凹部内に嵌入されかつ該凹部の底部を軸方向に貫通する支持軸の両端部が上記収容部の両側壁に支持されている。
【００１７】
また、上記支持軸には筒状のスラスト部材が相対的に回転可能に外嵌合され、このスラスト部材は上記支持部の凹部の開放口内面に、凹部外に位置する外端部を上記収容部における凹部の開放口側側壁に軸方向に対向させるように回転不能にかつ軸方向に移動可能に係合支持されている。
【００１８】
さらに、上記スラスト部材の外端部又は上記収容部における上記凹部の開放口側側壁の一方には、支持軸と同心状に円周方向に延びる円弧状の周溝が形成されている一方、スラスト部材の外端部又は上記収容部における上記凹部の開放口側側壁の他方には、上記周溝の底面に摺接するピン部が設けられている。
【００１９】
また、上記スラスト部材を上記ピン部が周溝の底面に押し付けられるように軸方向に付勢する軸方向付勢手段が設けられている。
【００２０】
そして、上記グリップ本体の使用位置から格納位置への回動に伴って上記軸方向付勢手段によるピン部の上記周溝底面に対する押付力が徐々に減少するように上記周溝の溝深さを変化させて形成している。
【００２１】
上記の構成によると、固定体に固定される１対の取付座にそれぞれグリップ本体が脚部にて回動可能に軸支され、このグリップ本体は回動付勢手段により使用位置から格納位置に回動付勢されているため、グリップ本体を使用位置に回動させて離すと、このグリップ本体は回動付勢手段の回動付勢トルクにより回動して格納位置に戻る。そして、グリップ本体の格納位置では、その脚部の収容部内に取付座の一部が収容される。
【００２２】
そのとき、１対の取付座のうちの少なくとも一方に、凹部を有する支持部が設けられている一方、この支持部の凹部内には支持軸が嵌入されて、この支持軸上の筒状のスラスト部材が支持部の凹部の開放口内面に回転不能にかつ軸方向に移動可能に係合支持されているので、グリップ本体が上記回動付勢手段の回動付勢トルクにより使用位置から格納位置へ向かって回動すると、互いに軸方向に対向するスラスト部材の外端部又は収容部における凹部の開放口側側壁の一方に形成されている周溝の底面上を、スラスト部材の外端部又は収容部における凹部の開放口側側壁の他方に設けられているピン部が、軸方向付勢手段により互いに押し付けられた圧接状態で摺接し、このときの摩擦抵抗によりグリップ本体の回動に制動トルクが働いてダンパ作用が得られる。
【００２３】
そして、上記上記周溝の溝深さが変化して形成され、この溝深さの変化によりグリップ本体の使用位置から格納位置への回動に伴って上記軸方向付勢手段によるピン部の上記周溝底面に対する押付力が徐々に減少するので、この周溝の底面とピン部との摺接による上記制動トルクは、グリップ本体が使用位置から格納位置に回動するのに応じて徐々に減少する。このため、上記回動付勢手段が例えば捩りコイルばね等のばねで構成され、その回動付勢トルクがグリップ本体の使用位置から格納位置への回動に応じて徐々に低下するようになっている場合に、その回動付勢トルクの低下に対応するように制動トルクも追従して低下し、両者が略一定の差を維持したまま低下するようになる。このことによって、グリップ本体の使用位置から格納位置までの全体に亘り、回動付勢手段の回動付勢トルクに対応した制動トルクが作用して、グリップ本体がゆっくりと回動し、その動きに高級感が得られる。
【００２４】
したがって、粘性剤を用いることなくダンパが得られ、その構造も簡単にすることができ、アシストグリップのコストダウンを図ることができる。また、従来の、粘弾性的な樹脂材料中に支承軸を挿通した構造のダンパに比して、制動トルクの調整が容易で、安定した制動トルクが得られる。
【００２５】
請求項２の発明では、上記軸方向付勢手段は、凹部の内底面とスラスト部材の凹部内に位置する内端部との間に縮装された圧縮ばねとする。こうすれば、凹部内に軸方向付勢手段としての圧縮ばねを配置収容でき、アシストグリップの外観見映えを向上できるとともに、スラスト部材の軸方向の付勢力を安定に確保してアシストグリップの作動安定性を高めることができる。
【００２６】
【発明の実施の形態】
図８は本発明の実施形態に係る回動型の格納式アシストグリップＧを示し、このアシストグリップＧは、例えば車両における車室の側壁に車室内に臨むように取付固定される。
【００２７】
上記アシストグリップＧは、例えばＰＰ（ポリプロピレン樹脂）等からなる樹脂製のグリップ本体１と、例えばＰＯＭ（ポリアセタール）等からなる第１及び第２の１対の取付座１１，１２とを備えてなる。上記グリップ本体１は長尺バー状のもので、その長さ方向が車体の前後方向と略一致するように配置されている。このグリップ本体１は長さ方向両端部が同じ方向に湾曲されて略コ字状をなし、その長さ方向両端部はそれぞれ第１及び第２脚部１ａ，１ｂとされている。
【００２８】
一方、図１、図２及び図６に示すように、各取付座１１，１２は車室の側壁の一部を構成する取付体としての車体パネルＰに表面側（車室側）から取付固定されている。この各取付座１１，１２の取付位置に対応する車体パネルＰにはボルト挿通孔Ｐ１が貫通形成され、車体パネルＰの裏面（背面）には上記ボルト挿通孔Ｐ１に対応してナットＮ（ウェルドナット）が溶接固定されている。尚、取付座１１，１２の車体パネルＰへの取付構造は、上記のようなボルトＢ及びナットＮの締結構造に限らず、係止爪等の係止構造やその他の構造を採用することができる。
【００２９】
そして、上記グリップ本体１は、その両脚部１ａ，１ｂにてそれぞれ取付座１１，１２に対し回動可能に軸支されており、このような両脚部１ａ，１ｂでの軸支構造により、グリップ本体１は使用位置及び格納位置の間で回動し、使用位置にあるときには、図２及び図６に実線にて示すようにグリップ本体１の中間部が車室内方に突出して水平面からやや斜め下方に向いた状態となる一方、格納位置にあるときには、図２及び図６に仮想線にて示すようにグリップ本体１が上記使用位置から略９０°上向きに回動して車室側壁（車体パネルＰ）に沿った状態となる。
【００３０】
上記グリップ本体１の各脚部１ａ，１ｂにおいて、グリップ本体１が格納位置にあるときの車室側壁の車体パネルＰに対向する外面には、断面略矩形状に切り欠いてなる略半楕円形状の凹部からなる収容部２が形成されている。図１、図２、図６及び図８に示すように、この各収容部２の周りには、グリップ本体１の長さ方向に対向する内外側壁２ａ，２ｂと、この内外側壁２ａ，２ｂの対向方向に直交する方向に対向し、脚部１ａの基部側及び先端側に位置する基部側及び先端側壁２ｃ，２ｄとが設けられ、内外側壁２ａ，２ｂ及び基部側壁２ｃは互いに略同じ高さであるが、先端側壁２ｄは、他の側壁２ａ〜２ｃに比べて低く形成されている。そして、グリップ本体１の格納位置で各収容部２内に取付座１１，１２の一部（取付座本体１３の先端部）を収容するようになっている。
【００３１】
また、図１に示す如く、グリップ本体１の各脚部１ａ，１ｂにおける収容部２の例えば内側壁２ａ（逆に外側壁２ｂでもよい）には、内側壁２ａの内面を凹陥してなる有底状の有底軸支持孔５が形成されている一方、外側壁２ｂ（逆に内側壁２ａでもよい）には貫通状の貫通軸支持孔６が上記有底軸支持孔５と同心状に貫通形成されている。
【００３２】
上記グリップ本体１の第１脚部１ａ（図８において右側のもの）と、この第１脚部１ａに対応する第１取付座１１との間には、図６に示すように、グリップ本体１を使用位置から格納位置に向かうように回動付勢する回動付勢手段としての捩りコイルばね７が、また第２脚部１ｂ（図８において左側のもの）と、この第２脚部１ｂに対応する第２取付座１２との間には、図１及び図２に示すように、グリップ本体１の回動に抵抗を付与するダンパ２４がそれぞれ設けられている。
【００３３】
上記第１及び第２取付座１１，１２はその大半が互いに同じ構造で、一部分のみの構造が異なる。この両取付座１１，１２の同じ構造の部分について説明すると、図１、図２及び図６に示す如く、各取付座１１，１２は、車室側に開口する有底箱状の取付座本体１３を備えている。この箱状の取付座本体１３の平面視は、上記収容部２に対応する形状、つまり楕円（長円）を長径方向に２分割した略半楕円形状で、その開口周縁部には取付座本体１３の開口を閉じるためのリッド１４が薄肉ヒンジ１４ａにより一体に形成されている。取付座本体１３の底壁部にはボルト挿通孔１５が貫通形成されており、このボルト挿通孔１５を車体パネルＰのボルト挿通孔Ｐ１に一致させ、両ボルト挿通孔１５，Ｐ１に取付ボルトＢを挿通して、その先端部を車体パネルＰ裏面の上記ウェルドナットＮに螺合締結することにより、各取付座１１，１２が車体パネルＰに取付固定されている。
【００３４】
尚、１３ａは取付座本体１３の底部周りに突設されたフランジで、このフランジ１３ａは、車体パネルＰ表側のトリム材（図示せず）上にそれを覆うように配置される。
【００３５】
上記両取付座１１，１２の異なる部分の構造について説明すると、図６に示すように、上記捩りコイルばね７側の第１取付座１１において、その取付座本体１３の側壁のうち格納位置にあるグリップ本体１の第１脚部１ａ先端側に位置する側壁の開口側端部には、グリップ本体１の長さ方向に延びる中空円筒状の支持部１７が一体に形成され、この支持部１７の周壁には矩形状の開口１８が形成され、支持部１７の長さ方向両端壁部にはそれぞれ軸挿通孔１９，１９（１つのみ図示する）が同心状に設けられている。そして、支持部１７の両軸挿通孔１９，１９に支持軸８を挿通し、この支持軸８の両端部をそれぞれ上記グリップ本体１の第１脚部１ａにおける収容部２の内外側壁２ａ，２ｂの軸支持孔５，６に嵌入することで、グリップ本体１の第１脚部１ａを第１取付座１１に支持軸８を介して回動可能に支持するようにしている。
【００３６】
また、グリップ本体１の第１脚部１ａにおける収容部２の先端側壁２ｄにはばね受部３が、また第１取付座１１の支持部１７内面の一部にもばね受部２０がそれぞれ切り欠いて形成されている。そして、上記捩りコイルばね７は上記支持部１７内に支持軸８の周りに配置された状態で収容され、この捩りコイルばね７の一端部は上記第１脚部１ａにおけるばね受部３に、また他端部は第１取付座１１の支持部１７におけるばね受部２０にそれぞれ係合されており、この捩りコイルばね７のばね力によりグリップ本体１を使用位置から格納位置に向かう方向（図６で反時計回り方向）に回動付勢する。捩りコイルばね７の回動付勢トルクは、図７に実線にて示すように、グリップ本体１の使用位置（図７で最大角位置）で最大になる一方、格納位置（同セット角位置）では最小となり、使用位置から格納位置へのグリップ本体１の回動に応じて略リニアに低下するようになっている。
【００３７】
一方、図１、図２及び図８に示すように、上記ダンパ２４側の第２取付座１２において、その取付座本体１３の側壁のうち格納位置にあるグリップ本体１の第２脚部１ｂ先端側に位置する側壁の開口側端部には有底円筒状の支持部２６が一体に形成されている。この支持部２６はその内部にグリップ本体１の長さ方向に延びる凹部２８を有し、この凹部２８の開放口は上記第２脚部１ｂにおける収容部２の内側壁２ａ側（外側壁２ｂ側でもよい）に、また底部は外側壁２ｂ側（内側壁２ａ側でもよい）にそれぞれ位置している。支持部２６において凹部２８の底部をなす部分の外面中心部には凹部２８の開放口と反対側に同心状に突出する円筒状の軸部２７が支持部２６と一体に形成され、この軸部２７の内部には凹部２８の内底面２８ａに開口する軸孔２９が貫通形成され、この軸孔２９の内径は上記第１脚部１ａにおける収容部２の内外側壁２ａ，２ｂの軸支持孔５，６と略同径に設けられている。
【００３８】
上記支持部２６の凹部２８内には回転軸３３が回動可能にかつ軸方向にスライド移動可能に先端側から嵌入され、この回転軸３３の先端部には他の部分よりも大径の外向フランジ部３３ａが一体に形成されている。この外向フランジ部３３ａの先端面外周部には複数のピン部３３ｂ，３３ｂ，…が一体に突設されており、回転軸３３の凹部２８内への嵌入状態で先端のピン部３３ｂ，３３ｂ，…が凹部２８の内底面２８ａに円周方向に沿って摺接可能に当接している。
【００３９】
上記回転軸３３は円筒状のもので、その内部には上記支持部２６の軸孔２９（第２脚部１ｂにおける収容部２の内外側壁２ａ，２ｂの軸支持孔５，６）と略同径の軸孔３３ｃが貫通形成されている。そして、第２脚部１ｂにおける収容部２の内外側壁２ａ，２ｂの軸支持孔５，６と、第２取付座１２の支持部２６の軸部２７内の軸孔２９と、回転軸３３内の軸孔３３ｃとを同心状に配置し、これらに有底中空パイプ状の支持軸９を開口側から外側壁２ｂ（内側壁２ａでもよい）の貫通軸支持孔６に挿通して、その先端部を内側壁２ａ（外側壁２ｂでもよい）の有底軸支持孔５に嵌入し、支持軸９の底部側を貫通軸支持孔６に外側壁２ｂと略面一状に配置して抜止め固定している。このことにより、支持軸９は凹部２８内に嵌入されて該凹部２８底部の軸孔２９及び回転軸３３の軸孔３３ｃを軸方向に貫通し、この支持軸９の両端部は収容部２の両側壁２ａ，２ｂに支持されており、グリップ本体１の第２脚部１ｂは第２取付座１２に支持軸９を介して回動可能に支持されている。このように、有底パイプ状の支持軸９の底部側を貫通軸支持孔６に外側壁２ｂと略面一状に配置すれば、逆に、支持軸９の開口側を貫通軸支持孔６に外側壁２ｂと略面一状に配置する場合に比べ、その支持軸９の開口を閉じるための別部材が不要であり、アシストグリップＧの外観見映えをも高めることができる。尚、支持軸９は中実のものを用いてもよいのは勿論である。
【００４０】
さらに、上記回転軸３３において凹部２８外に位置する基端部の端面には直径方向に対向する部位に１対の係止爪３４，３４が一体に突設されている。一方、グリップ本体１の第２脚部１ｂの収容部２の２つの側壁２ａ，２ｂのうち、上記回転軸３３の基端部側に位置する内側壁２ａは、支持部２６における凹部２８の開放口に面する開放口側側壁を構成しており、図３に示すように、この内側壁２ａの内面には、有底軸支持孔５の周りを一定高さだけ膨出させてなる膨出部３６が一体に形成されている。この膨出部３６の先端面は内側壁２ａの内面と平行な平面に設けられ、この膨出部３６の先端面には、収容部２の底部から略開口までの範囲に亘り両者を結ぶ方向と略平行に延びる係止溝３７が有底軸支持孔５上を通るように凹設され、この係止溝３７に上記回転軸３３の基端部の両係止爪３４，３４が係合されており、このことで、回転軸３３は、基端部を凹部２８の開放口に面する開放口側側壁としての内側壁２ａ（外側壁２ｂでもよい）に回動不能に係止せしめてグリップ本体１と一体的に回動するようになっている。尚、上記とは逆に、係止爪３４，３４を収容部２の側壁に、また係止溝３７を回転軸３３の基端部にそれぞれ設けることもできる。
【００４１】
上記支持部２６において凹部２８の開放口に相当する端部には有底円筒状のキャップ４０が凹部２８の開放口を閉じるように外嵌合状態で一体的に接合され、このキャップ４０の中心部にはスプライン孔４０ａが上記軸孔２９と同心状に貫通形成されている。そして、上記支持軸９周りの回転軸３３には円筒状のスラスト部材４２が相対的に回転可能に外嵌合され、このスラスト部材４２の外周面には上記キャップ４０のスプライン孔４０ａに噛合するスプライン部４２ａが形成されており、このことでスラスト部材４２は、その外周のスプライン部４２ａにて支持部２６の凹部２８の開放口内面にあるキャップ４０のスプライン孔４０ａに対し回転不能にかつ軸方向に移動可能に係合支持され、このスラスト部材４２の凹部２８外に位置する外端部は、上記収容部２の内側壁２ａ（開放口側側壁）内面の膨出部３６先端面に軸方向に対向するように配置されている。尚、キャップ４０とスラスト部材４２とはスプライン結合以外の構造、例えばキー結合で係合してもよく、両者を回転不能にかつ軸方向に移動可能に係合支持すればよい。
【００４２】
このように、軸方向に互いに対向している、スラスト部材４２の外端部と収容部２の内側壁２ａ（開放口側側壁）内面の膨出部３６先端面との間に上記ダンパ２４が設けられている。すなわち、後者の内側壁２ａ内面の膨出部３６先端面において上記係止溝３７を挟んだ位置には、図３に示すように、上記有底軸支持孔５、回転軸３３及び支持軸９と同心状に円周方向に延びる円弧状の１対の周溝４７，４７が有底軸支持孔５に対し対称に形成されている。
【００４３】
一方、上記前者のスラスト部材４２の外端部には、他の部分よりも大径の外向フランジ部４３と、この外向フランジ部４３の先端面（外面）において直径方向に対向する位置から軸方向に平行に同じ突出量だけ突出する１対のピン部４４，４４とが一体に形成され、これらピン部４４，４４はそれぞれ先端部で上記周溝４７，４７の底面４７ａ，４７ａに摺接するようになっている。
【００４４】
さらに、上記スラスト部材４２を上記各ピン部４４が対応する各周溝４７の底面４７ａに押し付けられるように軸方向（図１で右方向）に付勢する軸方向付勢手段が設けられている。具体的には、回転軸３３の先端において支持部２６の凹部２８の内底面２８ａに当接している外向フランジ部３３ａの背面（凹部２８開放口側の面）と、スラスト部材４２の凹部２８内に位置する内端部の先端側とにはそれぞればね受部を兼ねる回り止めワッシャ５０，５１が配置され、両回り止めワッシャ５０，５１間に軸方向付勢手段としての圧縮ばね５３が縮装されており、この圧縮ばね５３の伸張ばね力によりスラスト部材４２を図１で右方向に付勢して各ピン部４４を各周溝４７の底面４７ａに押し付けるようにしている。尚、回り止めワッシャ５０，５１により、グリップ本体１と共に回転軸３３がスラスト部材４２に対し回動する際に圧縮ばね５３が連れ回りするのを防止することができる。
【００４５】
そして、図４及び図５に示すように、上記収容部２の内側壁２ａ内面に設けられている各周溝４７の底面４７ａは長さ方向（周方向）に沿って傾斜していて、その溝深さが長さ方向の一端から他端に向かって滑らかに変化し、図３で時計回り方向端に位置する端部が最も深く、反時計回り方向に向かって次第に浅くなり、反時計回り方向端に位置する端部が最も浅くなるように形成され、両周溝４７，４７の溝深さ及び底面４７ａ，４７ａの傾斜角度は互いに同じに設定されている。このことにより、上記グリップ本体１の使用位置から格納位置への回動に伴って圧縮ばね５３（軸方向付勢手段）による各ピン部４４の各周溝４７の底面４７ａに対する押付力が徐々に減少するように各周溝４７の溝深さを変化させて形成している。
【００４６】
つまり、上記各周溝４７と、その周溝４７の底面４７ａに圧縮ばね５３の伸張ばね力により押し付けられて圧接状態で摺接するピン部４４とにより、グリップ本体１の回動に抵抗を付与するダンパ２４が構成され、このダンパ２４は、図７に一点鎖線にて示すように、グリップ本体１の使用位置（最大角位置）から格納位置（セット角位置）への回動に伴い、圧縮ばね５３による各ピン部４４の各周溝４７の底面４７ａに対する押付力が徐々に減少し、グリップ本体１の使用位置（最大角位置）では、図３〜図５で実線に示すように、各ピン部４４が各周溝４７の最浅端部に位置して圧縮ばね５３によるピン部４４の押付力が最大となる一方、グリップ本体１の格納位置（セット角位置）では、図３〜図５で仮想線に示すように、各ピン部４４が各周溝４７の最深端部に位置して圧縮ばね５３によるピン部４４の押付力が最小となる。従って、ダンパ２４の制動トルクは、グリップ本体１の使用位置から格納位置への回動に応じて上記捩りコイルばね７の回動付勢トルクが低下するのに連れて、該回動付勢トルクと常に略一定のトルク差が生じるようになっている。
【００４７】
上記実施形態のアシストグリップＧをグリップ本体１の各脚部１ａ，１ｂにおいて車体パネルＰに組み付ける作業について説明すると、第２取付座１２の支持部２６における凹部２８内に回転軸３３及びスラスト部材４２を嵌入するとともに、その回転軸３３の先端部の外向フランジ部３３ａとスラスト部材４２の内端部との間に圧縮ばね５３を介在させ、これらのものを第２脚部１ｂにおける収容部２内に嵌入して、収容部２の内外側壁２ａ，２ｂの軸支持孔５，６と、第２取付座１２の支持部２６の軸部２７内の軸孔２９と、回転軸３３内の軸孔３３ｃとを同心状に配置する。そして、これらの孔５，６，２９，３３ｃに支持軸９を外側壁２ｂの貫通軸支持孔６から挿入して、その先端部を内側壁２ａの有底軸支持孔５に嵌入する。このことで、グリップ本体１の第２脚部１ｂが第２取付座１２に支持軸９を介して回動可能に支持される。
【００４８】
このようにして第２取付座１２が組み付けられたアシストグリップＧは、第２取付座１２における取付座本体１３のボルト挿通孔１５に取付ボルトＢを挿通して第２取付座１２を車体パネルＰ裏面のナットＮに締結することにより、その第２取付座１２を介して車体パネルＰに組み付けられる。その後、第２取付座１２のヒンジ式のリッド１４を閉じることで、取付ボルトＢを覆って隠す。
【００４９】
一方、第１取付座１１においても、グリップ本体１の第１脚部１ａが支持軸８により回動可能に支持されるとともに、捩りコイルばね７が装着される。その後、第１取付座１１は上記第２取付座１２と略一緒にかつ同様にして車体パネルＰに組み付けられる。
【００５０】
したがって、この実施形態のアシストグリップＧにおいては、通常はグリップ本体１が捩りコイルばね７の回動付勢トルクにより回動付勢されて格納位置に位置付けられており、このグリップ本体１の格納位置では、その各脚部１ａ，１ｂの収容部２内にそれぞれ取付座１１，１２の一部が収容されている。車両の乗員がアシストグリップＧを使用するとき、そのグリップ本体１を手で掴んで捩りコイルばね７の付勢トルクに抗して使用位置に回動させればよい。また、このアシストグリップＧの使用停止時には、乗員がグリップ本体１から手を離すと、そのグリップ本体１は捩りコイルばね７の付勢トルクにより取付座１１，１２に対し使用位置から格納位置へ回動しながら戻る。そして、図７に示すように、上記グリップ本体１が使用位置（最大角位置）にあるときに捩りコイルばね７の回動付勢トルクが最大になり、格納位置（セット角位置）では回動付勢トルクは最小となり、使用位置から格納位置へのグリップ本体１の回動に応じて回動付勢トルクが略リニアに低下する。
【００５１】
このようなグリップ本体１の使用位置から格納位置への回動時（格納位置から使用位置への回動時にも同様のことが生じる）、グリップ本体１の第２脚部１ｂにおける収容部２の内外側壁２ａ，２ｂが第２取付座１２の支持部２６に対し支持軸９回りに回動するが、この収容部２の内側壁２ａにおける係止溝３７に回転軸３３基端部の両係止爪３４，３４が係合されているので、この回転軸３３も第２取付座１２の支持部２６の凹部２８内で相対的に回動する。
【００５２】
さらに、この凹部２８の開放口に固定したキャップ４０のスプライン孔４０ａには、回転軸３３周りに配置したスラスト部材４２が外周のスプライン部４２ａにて回転不能にかつ軸方向に移動可能に係合支持され、このスラスト部材４２の外端部とグリップ本体１の第２脚部１ｂにおける収容部２の内側壁２ａとの間にダンパ２４が設けられ、このダンパ２４は、収容部２の内側壁２ａにおける膨出部３６先端面に凹設された周溝４７，４７と、スラスト部材４２の外端部に突設され、周溝４７，４７の底面４７ａ，４７ａに上記圧縮ばね５３の伸張ばね力により押し付けられるピン部４４，４４とからなるので、グリップ本体１が上記捩りコイルばね７の回動付勢トルクにより使用位置から格納位置へ向かって回動すると、このグリップ本体１側にある各周溝４７の底面４７ａにおいて、第２取付座１２側にあって固定されているスラスト部材４２のピン部４４が圧接状態で摺接し、このときの摩擦抵抗によりグリップ本体１の回動に制動トルクが働いてダンパ作用が得られる。
【００５３】
その際、図４及び図５に示すように、上記各周溝４７の溝深さは一端から他端に向かって滑らかに変化し、上記グリップ本体１の使用位置ではピン部４４が周溝４７の最浅端部に、また格納位置ではピン部４４が周溝４７の最深端部にそれぞれ位置するので、このグリップ本体１の使用位置から格納位置への回動に伴い、各ピン部４４が各周溝４７の最浅端部から最深端部に移動し、圧縮ばね５３が伸張して、その各ピン部４４の各周溝４７の底面４７ａに対する押付力が徐々に減少する。このため、各周溝４７の底面４７ａと各ピン部４４との摺接による上記制動トルクは、グリップ本体１が使用位置から格納位置に回動するのに応じて徐々に減少する。それ故、上記グリップ本体１の使用位置から格納位置への回動に応じて上記捩りコイルばね７の回動付勢トルクが徐々に低下したとき、その回動付勢トルクの低下に対応するように上記ダンパ２４の制動トルクも低下し、両者が略一定の差を維持したまま低下するようになる。このことによって、グリップ本体１の使用位置から格納位置までの全体に亘り、常に、捩りコイルばね７の回動付勢トルクに対応した制動トルクが作用し、グリップ本体１がゆっくりと回動するようになり、グリップ本体１が車体パネルＰに強く当たることによる叩き音を発生させること等がなく、その動きに高級感が得られる。
【００５４】
すなわち、このように粘性剤を用いることなくダンパ２４が得られ、その構造も簡単にすることができるので、アシストグリップＧのコストダウンを図ることができる。また、従来の、粘弾性的な樹脂材料中に支承軸を挿通した構造のダンパに比して、ダンパ２４における制動トルクの調整が容易で、安定した制動トルクが得られる。
【００５５】
また、凹部２８の内底面上に位置する回転軸３３の先端部とスラスト部材４２の内端部との間に圧縮ばね５３を縮装し、この圧縮ばね５３の伸張ばね力によりスラスト部材４２を軸方向に移動付勢しているので、その圧縮ばね５３が凹部２８内に配置収容されて外部に露出せず、アシストグリップＧの外観見映えを向上できるとともに、圧縮ばね５３や周辺部にごみ等が付着し難く、このことでスラスト部材４２の軸方向の付勢力を安定に確保してアシストグリップＧの作動安定性を高めることができる。勿論、スラスト部材４２を軸方向に移動付勢する手段として、上記内包構造の圧縮ばね５３以外のものを採用することができる。しかし、上記の作用効果が得られることに鑑みれば、上記実施形態の構造の圧縮ばね５３を採用するのが好ましい。
【００５６】
さらに、上記支持軸９の周りに回転軸３３が嵌合され、この回転軸３３の上にスラスト部材４２が外嵌合されているので、この回転軸３３によりスラスト部材４２をガイドしながら軸方向にスムーズに移動させることができ、その作動が安定する。従って、回転軸３３を設けずともスラスト部材４２を軸方向に移動させることができるものの、その移動のスムーズ化、作動の安定化を達成する点で、上記実施形態の如く回転軸３３を設けるのがよい。
【００５７】
（他の実施形態）
尚、上記実施形態では、グリップ本体１側つまり回動側にある収容部２の内側壁２ａ内面の膨出部３６先端面に周溝４７，４７を、また取付座１２側つまり固定側にあるスラスト部材４２の外端部にピン部４４，４４をそれぞれ設けているが、この構造に限定されず、両者の設ける位置を逆にして、取付座１２側（固定側）にあるスラスト部材４２の外端部（例えば外向フランジ部４３等）に周溝を凹設し、またグリップ本体１側（回動側）にある収容部２の内側壁２ａ内面の膨出部３６先端面にピン部を突設してもよく、上記実施形態と同様の作用効果を奏することができる。
【００５８】
また、上記実施形態では、周溝４７及びピン部４４をそれぞれ２つとしているが、周溝４７及びピン部４４を１つずつとしてもよく、或いは３つずつ以上設けることもでき、形成する部位のスペース等に応じて適宜変更すればよい。さらに、周溝４７の底面４７ａやピン部４４の先端部を基材と共に耐摩耗性材料で形成するか、或いは基材とは別体の耐摩耗性材料で形成してもよく、そうすることで長期間に亘り安定してダンパ効果が得られる。
【００５９】
また、上記実施形態では、グリップ本体１の第２脚部１ｂにおける収容部２の内側壁２ａに係止溝３７を形成し、第２取付座１２の支持部２６の凹部２８を収容部２の内側壁２ａに向けて開放させて、この凹部２８に嵌入される回転軸３３の基端部を係止溝３７に係合させているが、逆に、収容部２の外側壁２ｂに係止溝を形成し、第２取付座１２の支持部２６の凹部２８を収容部２の外側壁２ｂに向けて開放させて、この凹部２８に嵌入される回転軸３３の基端部を係止溝に係合させてもよい。また、上記実施形態では、第２脚部１ｂと第２取付座１２とを連結する支持軸９は、収容部２の外側壁２ｂから挿通して先端部を内側壁２ａに挿入しているが、逆に、上述の如く支持軸を収容部２の内側壁２ａから挿通して先端部を外側壁２ｂに挿入するようにすることもできる。
【００６０】
【発明の効果】
以上説明したように、請求項１の発明では、固定体に取付固定される１対の取付座と、それに脚部にて回動可能に軸支されたグリップ本体と、このグリップ本体を使用位置から格納位置に回動付勢する回動付勢手段とを備えた回動型の格納式アシストグリップにおいて、その少なくとも一方の取付座と脚部との間に設けられて、グリップ本体の使用位置から格納位置への回動を抑制するダンパとして、取付座の支持部に凹部を形成し、この凹部にスラスト部材を、その凹部外に位置する外端部がグリップ本体の脚部における収容部の一方の側壁に対向するように回転不能にかつ軸方向に移動可能に嵌入し、このスラスト部材の外端部とグリップ本体側の収容部の側壁との一方に溝深さが変化する周溝を、また他方に周溝内を移動するピン部をそれぞれ設け、スラスト部材を軸方向に付勢して周溝の底面とピン部とを圧接状態でグリップ本体の回動により摺接させて制動トルクを得るようにした。従って、この発明によれば、回動付勢手段が例えば捩りコイルばね等のばねで構成され、その回動付勢トルクがグリップ本体の使用位置から格納位置への回動に応じて徐々に低下するようになっている場合に、その回動付勢トルクの低下に対応するようにダンパの制動トルクも低下して、両者が略一定の差を維持したまま低下するようになり、グリップ本体の使用位置から格納位置までの全体に亘って回動付勢手段の回動付勢トルクに対応した制動トルクが作用するようになり、よって粘性剤を用いることなく簡単な構造の安価なダンパが得られるとともに、そのダンパにより安定した制動トルクが得られてアシストグリップの作動安定性の向上を図ることができる。
【００６１】
請求項２の発明によると、スラスト部材を軸方向に付勢する手段を、凹部の内底面とスラスト部材の凹部内に位置する内端部との間に縮装された圧縮ばねとしたことにより、凹部内に圧縮ばねを配置収容して、アシストグリップの外観見映え及び作動安定性の向上を図ることができる。
【図面の簡単な説明】
【図１】図８のＩ−Ｉ線拡大断面図である。
【図２】図８のII−II線拡大断面図である。
【図３】図１のIII−III線拡大断面図である。
【図４】図３のIV−IV線断面図である。
【図５】図３のＶ−Ｖ線断面図である。
【図６】図８のVI−VI線拡大断面図である。
【図７】グリップ本体が格納位置及び使用位置間で回動するときの捩りコイルばねの付勢トルクとダンパの制動トルクとの関係を示す特性図である。
【図８】本発明の実施形態に係る格納式アシストグリップの全体構成をグリップ本体が使用位置にある状態で示す斜視図である。
【符号の説明】
Ｇ格納式アシストグリップ
Ｐ車体パネル（固定体）
１グリップ本体
１ｂ第２脚部
２収容部
２ａ内側壁
２ｂ外側壁
５有底軸支持孔
６貫通軸支持孔
７捩りコイルばね（回動付勢手段）
８支持軸
９支持軸
１１第１取付座
１２第２取付座
２４ダンパ
２６支持部
２８凹部
２８ａ内底面
３３回転軸
３３ｃ軸孔
４０キャップ
４０ａスプライン孔
４２スラスト部材
４２ａスプライン部
４４ピン部
４７周溝
４７ａ底面
５３圧縮ばね（軸方向付勢手段）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a retractable assist grip that is rotated and stored from a use position to a storage position when not in use, and in particular, provides a stable braking torque with a simple and inexpensive structure when rotating from the use position to the storage position. Belongs to the technical field.
[0002]
[Prior art]
Conventionally, as a retractable assist grip of this type, a pair of mounting seats fixed to a fixed body such as a vehicle body panel, and a long shape pivotally supported by each of the mounting seats so as to be rotatable by legs. 2. Description of the Related Art A grip body and a rotation biasing means such as a coil spring that biases the grip body from a use position to a storage position are known.
[0003]
In such an assist grip, when the grip body is rotated from the storage position to the use position, the user (person) performs the operation. When the grip body in the use position is released, the grip body is rotated. The urging torque of the moving urging means is rotated from the use position and returned to the retracted position.
[0004]
At this time, if braking force (resistance) is applied by the damper when the grip body rotates from the use position to the storage position, the grip body moves slowly from the use position to the storage position by the braking, so the grip body is After being released, it suddenly rotates to the storage position, and does not hit the vehicle body at the storage position and makes a hitting sound, so that a desirable high-class feeling can be obtained.
[0005]
As such a damper, conventionally, as shown in Patent Document 1, for example, in a grip in which a leg portion of a grip body is supported by a support via a support shaft, the support shaft is made of a viscoelastic resin. It has been proposed to contact a friction brake made of a material and to provide a sliding resistance by the friction brake when the grip body rotates from the use position to the retracted position to reduce the rotation speed.
[0006]
In addition, although not aimed at a damper effect over the entire rotation range of the grip body, Patent Document 2 discloses that when the grip body is in the retracted position, it is on the diametrical extension line of the shaft of the mounting seat. Attach the retainer to the grip body at the position facing the opposing surface, attach cushion rubber on this retainer, and attach the cushion rubber when the grip body rotated from the use position toward the storage position approaches the storage position. It has been proposed to use cushion rubber to mitigate the impact that the grip body tries to suddenly stop at the retracted position by contacting the seat-side facing surface.
[0007]
Further, a damper in which a high-viscosity viscous agent is sealed is used as the damper, and the damper is integrated between the grip body and the mounting seat (see, for example, Patent Document 3). .
[0008]
[Patent Document 1]
JP-A-5-96982
[Patent Document 2]
Japanese Patent Laid-Open No. 7-137566
[Patent Document 3]
JP 2001-58535 A
[0009]
[Problems to be solved by the invention]
By the way, when a viscous damper is used as in the above-mentioned Patent Document 3, although the movement of the grip body can be given a high-class feeling, the high-viscosity viscous agent is relatively expensive, and the seal of the viscous agent is used. Therefore, the structure and the like must be complicated, and there is room for improvement in terms of cost and structure.
[0010]
On the other hand, as in Patent Document 1, the friction type in which the support shaft of the grip is brought into contact with a friction brake made of a viscoelastic resin material can be manufactured at a low cost because no viscous agent is used. The structure is simple, but on the other hand, since the bearing shaft is inserted into a viscoelastic resin material, there is a drawback that it is difficult to adjust the braking torque and a stable braking torque cannot be obtained.
[0011]
An object of the present invention is to improve the damper structure of the friction type retractable assist grip as described above, thereby obtaining an inexpensive damper having a simple structure without using a viscous agent, and providing a stable braking torque by the damper. Is to improve the operational stability of the assist grip.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, a concave portion extending in the axial direction is formed on the mounting seat side, the thrust member is disposed in the concave portion, and the outer end portion located outside the concave portion is in the leg portion of the grip body. A non-rotatable and axially movable fitting is inserted so as to face one side wall of the housing portion, and the groove depth changes to one of the outer end portion of this thrust member and the side wall of the housing portion on the grip body side. A circumferential groove and a pin portion that moves in the circumferential groove are provided on the other side, and the bottom surface of the circumferential groove and the pin portion are brought into relative sliding contact with the rotation of the grip body in a pressure contact state to obtain a braking torque. did.
[0013]
Specifically, in the invention of claim 1, a pair of mounting seats fixed to the fixed body, and a long grip body pivotally supported by the mounting seats at the respective leg portions, A retractable assist grip provided with a rotation urging means that urges the grip body from the use position to the storage position is a premise.
[0014]
The leg has a side wall facing the fixed body when the grip body is in the retracted position, and has two side walls facing the length direction of the grip body, and the grip body is in the retracted position. A housing portion for housing a part of the mounting seat is cut out.
[0015]
Further, at least one of the pair of mounting seats is formed with a bottomed cylindrical support portion having a concave portion extending in the length direction of the grip body, and the opening of the concave portion serves as an opening of the housing portion. One of the two side walls is located on the side wall, and the bottom is located on the other side wall.
[0016]
Both ends of a support shaft that is fitted into the recess and penetrates the bottom of the recess in the axial direction are supported by both side walls of the housing portion.
[0017]
Further, a cylindrical thrust member is externally fitted to the support shaft so as to be relatively rotatable. The thrust member accommodates the outer end portion located outside the recess on the inner surface of the opening of the recess of the support portion. It is engaged and supported so as to be non-rotatable and movable in the axial direction so as to face the opening side wall of the recess in the portion in the axial direction.
[0018]
Further, an arc-shaped circumferential groove extending in the circumferential direction concentrically with the support shaft is formed on one of the outer end side of the thrust member or the opening side wall of the recess in the housing portion. A pin portion that is in sliding contact with the bottom surface of the circumferential groove is provided on the other end of the member or on the other side of the opening-side side wall of the recess in the housing portion.
[0019]
An axial biasing means is provided for biasing the thrust member in the axial direction so that the pin portion is pressed against the bottom surface of the circumferential groove.
[0020]
Then, the groove depth of the circumferential groove is set so that the pressing force of the pin portion against the bottom surface of the circumferential groove by the axial urging means gradually decreases with the rotation of the grip body from the use position to the storage position. It is formed by changing.
[0021]
According to the above configuration, the grip body is pivotally supported by the leg portion on each of the pair of mounting seats fixed to the fixed body, and the grip body is moved from the use position to the storage position by the rotation biasing means. Since the grip body is rotated and biased, when the grip body is rotated to the use position and released, the grip body is rotated by the rotation bias torque of the rotation biasing means and returns to the storage position. And in the storing position of a grip main part, a part of attachment seat is accommodated in the accommodating part of the leg part.
[0022]
At that time, at least one of the pair of mounting seats is provided with a support portion having a recess, while a support shaft is fitted into the recess of the support portion, and a cylindrical shape on the support shaft is inserted. Since the thrust member is engaged and supported on the inner surface of the opening of the recess of the support portion so as not to rotate but to move in the axial direction, the grip body is stored from the use position by the rotation biasing torque of the rotation biasing means. When rotating toward the position, the outer end portion of the thrust member is placed on the outer end portion of the thrust member facing the axial direction or the bottom surface of the circumferential groove formed on one of the opening side walls of the recess in the housing portion. Alternatively, the pin portion provided on the other side of the opening-side side wall of the recess in the housing portion is in sliding contact with each other while being pressed against each other by the axial biasing means, and the frictional resistance at this time brakes the rotation of the grip body. Torque is working Path effect can be obtained.
[0023]
The groove depth of the circumferential groove is changed, and the change in the groove depth causes the pin portion of the pin portion by the axial urging means to rotate as the grip body rotates from the use position to the storage position. Since the pressing force against the circumferential groove bottom surface gradually decreases, the braking torque due to the sliding contact between the circumferential groove bottom surface and the pin portion gradually decreases as the grip body rotates from the use position to the retracted position. To do. For this reason, the rotation urging means is constituted by a spring such as a torsion coil spring, and the rotation urging torque gradually decreases in accordance with the rotation of the grip body from the use position to the storage position. In this case, the braking torque also follows and decreases so as to correspond to the decrease in the rotational biasing torque, and both decrease while maintaining a substantially constant difference. As a result, a braking torque corresponding to the rotation biasing torque of the rotation biasing means acts from the use position of the grip body to the storage position, and the grip body slowly rotates, and the movement thereof. A high-class feeling is obtained.
[0024]
Therefore, a damper can be obtained without using a viscous agent, the structure thereof can be simplified, and the cost of the assist grip can be reduced. Further, as compared with a conventional damper having a structure in which a support shaft is inserted into a viscoelastic resin material, the braking torque can be easily adjusted and a stable braking torque can be obtained.
[0025]
According to a second aspect of the present invention, the axial urging means is a compression spring that is compressed between the inner bottom surface of the recess and the inner end located in the recess of the thrust member. In this way, the compression spring as the axial urging means can be disposed and accommodated in the recess, so that the appearance of the assist grip can be improved, and the axial urging force of the thrust member can be stably secured to operate the assist grip. Stability can be increased.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 8 shows a pivotable retractable assist grip G according to an embodiment of the present invention. The assist grip G is attached and fixed to, for example, a side wall of a passenger compartment of a vehicle so as to face the passenger compartment.
[0027]
The assist grip G includes a resin grip body 1 made of, for example, PP (polypropylene resin), and a first and second pair of mounting seats 11, 12 made of, for example, POM (polyacetal). . The grip body 1 has a long bar shape, and is arranged so that its length direction substantially coincides with the longitudinal direction of the vehicle body. This grip body 1 is bent in the same direction at both ends in the length direction so as to have a substantially U shape, and the both ends in the length direction are first and second legs 1a and 1b, respectively.
[0028]
On the other hand, as shown in FIGS. 1, 2 and 6, the mounting seats 11 and 12 are fixed to the vehicle body panel P as a mounting body constituting a part of the side wall of the passenger compartment from the front side (vehicle compartment side). Has been. Bolt insertion holes P1 are formed through the body panel P corresponding to the mounting positions of the mounting seats 11 and 12, and nuts N (weld) corresponding to the bolt insertion holes P1 are formed on the back surface (back surface) of the body panel P. Nut) is fixed by welding. The mounting structure of the mounting seats 11 and 12 to the vehicle body panel P is not limited to the fastening structure of the bolt B and the nut N as described above, and a locking structure such as a locking claw or other structure can be adopted. it can.
[0029]
The grip body 1 is pivotally supported by the both leg portions 1a and 1b so as to be rotatable with respect to the mounting seats 11 and 12, respectively, and the grip structure by the both leg portions 1a and 1b provides a grip. The main body 1 rotates between the use position and the storage position, and when in the use position, as shown by solid lines in FIGS. 2 and 6, the middle part of the grip main body 1 protrudes toward the interior of the vehicle and is slightly inclined from the horizontal plane. On the other hand, when in the retracted position, the grip body 1 is rotated approximately 90 ° upward from the use position as shown in phantom lines in FIGS. A state along the panel P) is obtained.
[0030]
In each leg 1a, 1b of the grip body 1, a substantially semi-elliptical shape in which the outer surface facing the vehicle body panel P on the side wall of the passenger compartment when the grip body 1 is in the retracted position is cut out in a substantially rectangular cross section. The accommodating part 2 which consists of a recessed part is formed. As shown in FIG. 1, FIG. 2, FIG. 6 and FIG. 8, there are inner and outer walls 2a and 2b opposed to each other in the length direction of the grip body 1 and inner and outer walls 2a and 2b around each housing portion 2. The base side and the tip side walls 2c and 2d are provided opposite to each other in a direction orthogonal to the facing direction and located on the base side and the tip side of the leg 1a. However, the tip side wall 2d is formed lower than the other side walls 2a to 2c. A part of the mounting seats 11 and 12 (the front end portion of the mounting seat main body 13) is stored in each storage portion 2 at the storage position of the grip main body 1.
[0031]
Further, as shown in FIG. 1, for example, the inner wall 2a (which may be the outer wall 2b) of the accommodating portion 2 in each leg portion 1a, 1b of the grip body 1 has a concave inner surface of the inner wall 2a. While a bottomed bottomed shaft support hole 5 is formed, a penetrating through shaft support hole 6 is concentric with the bottomed shaft support hole 5 on the outer wall 2b (or the inner wall 2a, conversely). It is formed through.
[0032]
As shown in FIG. 6, between the first leg 1a of the grip body 1 (on the right side in FIG. 8) and the first mounting seat 11 corresponding to the first leg 1a, the grip body 1 The torsion coil spring 7 as a rotation urging means for urging the rotation from the use position toward the storage position is also provided with a second leg 1b (the left one in FIG. 8) and the second leg 1b. As shown in FIGS. 1 and 2, dampers 24 that impart resistance to the rotation of the grip body 1 are provided between the second mounting seats 12 corresponding to the above.
[0033]
Most of the first and second mounting seats 11 and 12 have the same structure, and only a part of the structure is different. The same structure portion of the mounting seats 11 and 12 will be described. As shown in FIGS. 1, 2 and 6, each mounting seat 11 and 12 has a bottomed box-shaped mounting seat body which opens to the vehicle compartment side. 13 is provided. A plan view of the box-shaped mounting seat body 13 has a shape corresponding to the housing portion 2, that is, a substantially semi-elliptical shape in which an ellipse (oval) is divided into two in the major axis direction. A lid 14 for closing the opening 13 is integrally formed by a thin hinge 14a. A bolt insertion hole 15 is formed through the bottom wall portion of the mounting seat body 13. The bolt insertion hole 15 is made to coincide with the bolt insertion hole P1 of the vehicle body panel P, and the mounting bolt B is connected to both the bolt insertion holes 15 and P1. The mounting seats 11 and 12 are fixedly attached to the vehicle body panel P by screwing and fastening the front end portions thereof to the weld nuts N on the rear surface of the vehicle body panel P.
[0034]
Reference numeral 13a denotes a flange projecting around the bottom of the mounting seat body 13, and the flange 13a is arranged on a trim member (not shown) on the front side of the vehicle body panel P so as to cover it.
[0035]
The structure of the different parts of the mounting seats 11 and 12 will be described. As shown in FIG. 6, in the first mounting seat 11 on the torsion coil spring 7 side, the side wall of the mounting seat body 13 is in the retracted position. A hollow cylindrical support portion 17 extending in the length direction of the grip body 1 is integrally formed at the opening side end portion of the side wall located on the distal end side of the first leg portion 1 a of the grip body 1. A rectangular opening 18 is formed in the peripheral wall, and shaft insertion holes 19 and 19 (only one is shown) are concentrically provided on both end wall portions of the support portion 17 in the length direction. The support shaft 8 is inserted into the shaft insertion holes 19 and 19 of the support portion 17, and both end portions of the support shaft 8 are respectively connected to the inner and outer walls 2 a and 2 b of the housing portion 2 in the first leg portion 1 a of the grip body 1. The first leg 1a of the grip body 1 is rotatably supported on the first mounting seat 11 via the support shaft 8 by being inserted into the shaft support holes 5 and 6.
[0036]
Further, the spring receiving portion 3 is cut on the distal end side wall 2d of the accommodating portion 2 in the first leg portion 1a of the grip body 1, and the spring receiving portion 20 is also cut on a part of the inner surface of the support portion 17 of the first mounting seat 11. It is lacking. The torsion coil spring 7 is accommodated in the support portion 17 in a state of being arranged around the support shaft 8, and one end portion of the torsion coil spring 7 is connected to the spring receiving portion 3 in the first leg portion 1a. The other end is engaged with a spring receiving portion 20 in the support portion 17 of the first mounting seat 11, and the direction of the grip body 1 from the use position toward the retracted position by the spring force of the torsion coil spring 7 (see FIG. 6 to counter-clockwise). The rotational biasing torque of the torsion coil spring 7 is maximized at the use position of the grip body 1 (maximum angle position in FIG. 7) as shown by the solid line in FIG. However, it becomes the minimum, and it falls substantially linearly according to rotation of the grip main body 1 from a use position to a storage position.
[0037]
On the other hand, as shown in FIGS. 1, 2, and 8, in the second mounting seat 12 on the damper 24 side, the distal end of the second leg 1 b of the grip body 1 in the retracted position on the side wall of the mounting seat body 13. A bottomed cylindrical support portion 26 is integrally formed at the opening side end portion of the side wall located on the side. The support portion 26 has a recess 28 extending in the length direction of the grip body 1 therein, and the opening of the recess 28 is on the inner wall 2a side (outer wall 2b side) of the housing portion 2 in the second leg portion 1b. And the bottom is located on the outer wall 2b side (or on the inner wall 2a side). A cylindrical shaft portion 27 concentrically protruding on the opposite side of the opening of the recess 28 is formed integrally with the support portion 26 at the center of the outer surface of the portion that forms the bottom of the recess 28 in the support portion 26. A shaft hole 29 that opens to the inner bottom surface 28a of the recess 28 is formed in the interior of the recess 27. The inner diameter of the shaft hole 29 is the shaft support hole 5 of the inner and outer walls 2a and 2b of the housing portion 2 in the first leg portion 1a. , 6 and approximately the same diameter.
[0038]
A rotary shaft 33 is fitted into the concave portion 28 of the support portion 26 from the distal end side so as to be rotatable and slidable in the axial direction. The distal end portion of the rotary shaft 33 has an outward diameter larger than that of other portions. The flange portion 33a is integrally formed. A plurality of pin portions 33b, 33b,... Are integrally projected on the outer peripheral portion of the distal end surface of the outward flange portion 33a, and the distal end pin portions 33b, 33b,. Are in slidable contact with the inner bottom surface 28a of the recess 28 along the circumferential direction.
[0039]
The rotating shaft 33 has a cylindrical shape, and the inside thereof is substantially the same as the shaft hole 29 of the support portion 26 (the shaft support holes 5 and 6 of the inner and outer walls 2a and 2b of the housing portion 2 in the second leg portion 1b). A shaft hole 33c having a diameter is formed through. The shaft support holes 5 and 6 of the inner and outer walls 2a and 2b of the housing portion 2 in the second leg portion 1b, the shaft hole 29 in the shaft portion 27 of the support portion 26 of the second mounting seat 12, and the rotation shaft 33 The bottomed hollow pipe-like support shaft 9 is inserted into the through-shaft support hole 6 of the outer wall 2b (or the inner wall 2a) from the opening side, Part is fitted into the bottomed shaft support hole 5 of the inner wall 2a (or the outer wall 2b), and the bottom side of the support shaft 9 is arranged in the through-shaft support hole 6 so as to be substantially flush with the outer wall 2b to prevent it It is fixed. As a result, the support shaft 9 is fitted into the recess 28 and passes through the shaft hole 29 at the bottom of the recess 28 and the shaft hole 33 c of the rotary shaft 33 in the axial direction. The second leg 1b of the grip body 1 is supported by the second mounting seat 12 via a support shaft 9 so as to be rotatable. Thus, if the bottom side of the bottomed pipe-like support shaft 9 is disposed in the through-shaft support hole 6 so as to be substantially flush with the outer wall 2b, the support shaft 9 on the open side is conversely disposed on the through-shaft support hole 6. Compared with the case where the outer wall 2b is disposed substantially flush with the outer wall 2b, a separate member for closing the opening of the support shaft 9 is not required, and the appearance appearance of the assist grip G can be enhanced. Needless to say, the support shaft 9 may be solid.
[0040]
Further, a pair of locking claws 34, 34 project integrally from the end surface of the base end portion located outside the recess 28 in the rotating shaft 33 at a portion facing the diameter direction. On the other hand, of the two side walls 2 a and 2 b of the housing portion 2 of the second leg 1 b of the grip body 1, the inner side wall 2 a located on the base end side of the rotating shaft 33 opens the recess 28 in the support portion 26. As shown in FIG. 3, a bulge formed by bulging the inner wall 2a around the bottomed shaft support hole 5 by a certain height is formed. The part 36 is integrally formed. The leading end surface of the bulging portion 36 is provided in a plane parallel to the inner surface of the inner wall 2a, and the leading end surface of the bulging portion 36 is connected in the direction extending from the bottom of the housing portion 2 to the substantially opening. A locking groove 37 extending substantially in parallel with the bottomed shaft support hole 5 is recessed so that both locking claws 34, 34 at the base end of the rotating shaft 33 are engaged with the locking groove 37. In this way, the rotation shaft 33 is non-rotatably locked to the inner side wall 2a (or the outer side wall 2b) as the opening side wall facing the opening of the concave portion 28 at the base end portion. The grip body 1 is configured to rotate integrally. Contrary to the above, the locking claws 34, 34 can be provided on the side wall of the housing portion 2, and the locking groove 37 can be provided on the proximal end portion of the rotating shaft 33.
[0041]
A bottomed cylindrical cap 40 is integrally joined to the end of the support portion 26 corresponding to the opening of the recess 28 in an externally fitted state so as to close the opening of the recess 28. A spline hole 40a is formed through the part so as to be concentric with the shaft hole 29. A cylindrical thrust member 42 is fitted on the rotary shaft 33 around the support shaft 9 so as to be relatively rotatable, and the outer peripheral surface of the thrust member 42 meshes with the spline hole 40a of the cap 40. A spline portion 42a is formed, so that the thrust member 42 cannot rotate with respect to the spline hole 40a of the cap 40 on the inner surface of the opening of the concave portion 28 of the support portion 26 by the spline portion 42a on the outer periphery. The outer end portion that is engaged and supported so as to be movable in the direction and is located outside the concave portion 28 of the thrust member 42 is pivoted to the distal end surface of the bulging portion 36 on the inner surface of the inner wall 2a (opening side wall) of the housing portion 2. It arrange | positions so that it may oppose in a direction. The cap 40 and the thrust member 42 may be engaged by a structure other than a spline connection, for example, a key connection, and both may be engaged and supported so that they cannot rotate and can move in the axial direction.
[0042]
As described above, the damper 24 is disposed between the outer end portion of the thrust member 42 and the front end surface of the bulging portion 36 on the inner surface of the inner wall 2a (opening side wall) of the housing portion 2 that are opposed to each other in the axial direction. Is provided. That is, as shown in FIG. 3, the bottomed shaft support hole 5, the rotary shaft 33, and the support shaft 9 are located at the position where the locking groove 37 is sandwiched at the distal end surface of the bulging portion 36 on the inner surface of the inner wall 2a. A pair of circumferential grooves 47 and 47 concentrically extending in the circumferential direction are formed symmetrically with respect to the bottomed shaft support hole 5.
[0043]
On the other hand, the outer end portion of the former thrust member 42 has an outward flange portion 43 having a larger diameter than the other portions, and the axial direction from the position facing the diametrical direction on the distal end surface (outer surface) of the outward flange portion 43. A pair of pin portions 44 and 44 projecting in parallel with each other by the same projecting amount are integrally formed, and these pin portions 44 and 44 are in sliding contact with the bottom surfaces 47a and 47a of the circumferential grooves 47 and 47, respectively, at the tip portions. It has become.
[0044]
Further, axial urging means is provided for urging the thrust member 42 in the axial direction (rightward in FIG. 1) so that the pin portions 44 are pressed against the bottom surfaces 47a of the corresponding circumferential grooves 47. . Specifically, the rear surface (surface on the opening side of the recess 28) that is in contact with the inner bottom surface 28 a of the recess 28 of the support portion 26 at the tip of the rotating shaft 33 and the recess 28 of the thrust member 42. Non-rotating washers 50 and 51, which also serve as spring receiving portions, are respectively arranged on the distal end side of the inner end portion located at, and a compression spring 53 as an axial urging means is fitted between the anti-rotation washers 50 and 51. The thrust member 42 is urged to the right in FIG. 1 by the extension spring force of the compression spring 53 to press each pin portion 44 against the bottom surface 47 a of each circumferential groove 47. The rotation stopper washers 50 and 51 can prevent the compression spring 53 from rotating together with the grip body 1 when the rotating shaft 33 rotates with respect to the thrust member 42.
[0045]
And as shown in FIG.4 and FIG.5, the bottom face 47a of each circumferential groove 47 provided in the inner wall 2a inner surface of the said accommodating part 2 inclines along a length direction (circumferential direction), The The groove depth changes smoothly from one end to the other in the length direction, and the end located at the end in the clockwise direction in FIG. 3 is the deepest, and gradually becomes shallower in the counterclockwise direction. The end portions located at the direction ends are formed so as to be shallowest, and the groove depths of the circumferential grooves 47 and 47 and the inclination angles of the bottom surfaces 47a and 47a are set to be the same. As a result, as the grip body 1 is rotated from the use position to the storage position, the pressing force of the compression spring 53 (axial biasing means) against the bottom surface 47a of each circumferential groove 47 of each pin portion 44 is gradually increased. The groove depth of each circumferential groove 47 is changed so as to decrease.
[0046]
That is, each of the circumferential grooves 47 and the pin portion 44 that is pressed against the bottom surface 47a of the circumferential groove 47 by the extension spring force of the compression spring 53 and is slidably contacted in a pressure contact state, provide resistance to the rotation of the grip body 1. A damper 24 is configured, and this damper 24 is a compression spring as the grip body 1 is rotated from the use position (maximum angle position) to the storage position (set angle position) as shown by a one-dot chain line in FIG. 53, the pressing force of each pin portion 44 against the bottom surface 47a of each circumferential groove 47 gradually decreases. When the grip body 1 is used (maximum angle position), as shown by the solid lines in FIGS. The portion 44 is positioned at the shallowest end of each circumferential groove 47, and the pressing force of the pin portion 44 by the compression spring 53 is maximized. On the other hand, in the retracted position (set angle position) of the grip body 1, FIGS. As shown by the phantom lines in FIG. There pressing force of the pin portion 44 by the compression spring 53 is minimized located deepest end of each circumferential groove 47. Therefore, the braking torque of the damper 24 is adjusted as the rotational biasing torque of the torsion coil spring 7 decreases in accordance with the rotation of the grip body 1 from the use position to the retracted position. A constant torque difference is always generated.
[0047]
The operation of assembling the assist grip G of the above embodiment to the vehicle body panel P at each leg 1a, 1b of the grip body 1 will be described. The rotating shaft 33 and the thrust member 42 are placed in the recess 28 in the support portion 26 of the second mounting seat 12. , And a compression spring 53 is interposed between the outward flange portion 33a at the tip of the rotating shaft 33 and the inner end portion of the thrust member 42, and these are placed in the accommodating portion 2 in the second leg portion 1b. The shaft support holes 5 and 6 of the inner and outer walls 2a and 2b of the housing portion 2, the shaft hole 29 in the shaft portion 27 of the support portion 26 of the second mounting seat 12, and the shaft hole in the rotary shaft 33 33c is arranged concentrically. Then, the support shaft 9 is inserted into the holes 5, 6, 29, and 33c from the through-shaft support hole 6 of the outer wall 2b, and the tip portion is fitted into the bottomed shaft support hole 5 of the inner wall 2a. Thus, the second leg 1b of the grip body 1 is rotatably supported by the second mounting seat 12 via the support shaft 9.
[0048]
The assist grip G to which the second mounting seat 12 is assembled in this manner is inserted into the bolt insertion hole 15 of the mounting seat body 13 in the second mounting seat 12 so that the second mounting seat 12 is attached to the vehicle body panel P. By being fastened to the nut N on the back surface, it is assembled to the vehicle body panel P via the second mounting seat 12. Thereafter, the hinged lid 14 of the second mounting seat 12 is closed to cover and hide the mounting bolt B.
[0049]
On the other hand, in the first mounting seat 11, the first leg 1 a of the grip body 1 is rotatably supported by the support shaft 8 and the torsion coil spring 7 is attached. Thereafter, the first mounting seat 11 is assembled to the vehicle body panel P substantially together with and in the same manner as the second mounting seat 12.
[0050]
Therefore, in the assist grip G of this embodiment, the grip body 1 is normally rotated and urged by the rotation urging torque of the torsion coil spring 7 and is positioned at the storage position. Then, a part of the mounting seats 11 and 12 is accommodated in the accommodating portions 2 of the leg portions 1a and 1b, respectively. When the vehicle occupant uses the assist grip G, the grip body 1 may be grasped by hand and rotated to the use position against the urging torque of the torsion coil spring 7. Further, when the use of the assist grip G is stopped, when the occupant releases his hand from the grip body 1, the grip body 1 is rotated from the use position to the retracted position with respect to the mounting seats 11 and 12 by the biasing torque of the torsion coil spring 7. Return while moving. As shown in FIG. 7, when the grip body 1 is in the use position (maximum angle position), the rotational biasing torque of the torsion coil spring 7 becomes maximum, and the grip body 1 rotates at the retracted position (set angle position). The urging torque is minimized, and the rotation urging torque decreases substantially linearly according to the rotation of the grip body 1 from the use position to the storage position.
[0051]
When the grip body 1 is rotated from the use position to the storage position (the same thing occurs when the grip body 1 is rotated from the storage position to the use position), the accommodation portion 2 of the second leg portion 1b of the grip body 1 is moved. The inner and outer walls 2a and 2b rotate about the support shaft 9 with respect to the support portion 26 of the second mounting seat 12, but the engaging groove 37 in the inner wall 2a of the housing portion 2 is coupled to the base end portion of the rotation shaft 33. Since the pawls 34 are engaged, the rotary shaft 33 is also relatively rotated in the recess 28 of the support portion 26 of the second mounting seat 12.
[0052]
Further, a thrust member 42 disposed around the rotation shaft 33 is engaged with the spline hole 40a of the cap 40 fixed to the opening of the recess 28 so as to be non-rotatable on the outer peripheral spline portion 42a and movable in the axial direction. A damper 24 is provided between the outer end portion of the thrust member 42 and the inner wall 2 a of the housing portion 2 in the second leg 1 b of the grip body 1, and the damper 24 is an inner wall of the housing portion 2. 2a, circumferential grooves 47, 47 recessed at the front end surface of the bulging portion 36, and protruding from the outer end portion of the thrust member 42, and the extension springs of the compression spring 53 on the bottom surfaces 47a, 47a of the circumferential grooves 47, 47 When the grip body 1 is rotated from the use position toward the storage position by the rotation biasing torque of the torsion coil spring 7, the grip main body 1 is formed. On the bottom surface 47a of each circumferential groove 47 on the 1 side, the pin portion 44 of the thrust member 42 fixed on the second mounting seat 12 side is slidably contacted in a pressure contact state. A braking torque acts on the rotation to obtain a damper action.
[0053]
At that time, as shown in FIGS. 4 and 5, the groove depth of each circumferential groove 47 smoothly changes from one end to the other end, and the pin portion 44 is located in the circumferential groove 47 at the use position of the grip body 1. Since the pin portion 44 is located at the shallowest end portion of the groove body 47 and at the deepest end portion of the circumferential groove 47 at the retracted position, each pin portion 44 is moved as the grip body 1 is rotated from the use position to the retracted position. The circumferential spring 47 moves from the shallowest end portion to the deepest end portion, the compression spring 53 expands, and the pressing force of each pin portion 44 against the bottom surface 47a of each circumferential groove 47 gradually decreases. For this reason, the braking torque due to the sliding contact between the bottom surface 47a of each circumferential groove 47 and each pin portion 44 gradually decreases as the grip body 1 rotates from the use position to the storage position. Therefore, when the rotation biasing torque of the torsion coil spring 7 gradually decreases in response to the rotation of the grip body 1 from the use position to the storage position, it corresponds to the decrease in the rotation biasing torque. In addition, the braking torque of the damper 24 also decreases, and both decrease while maintaining a substantially constant difference. As a result, a braking torque corresponding to the rotational biasing torque of the torsion coil spring 7 is always applied from the use position of the grip body 1 to the storage position so that the grip body 1 rotates slowly. Thus, a hitting sound due to the grip body 1 strongly hitting the vehicle body panel P is not generated, and a high-quality feeling can be obtained.
[0054]
That is, the damper 24 can be obtained without using a viscous agent in this way, and the structure thereof can be simplified, so that the cost of the assist grip G can be reduced. Further, as compared with a conventional damper having a structure in which a support shaft is inserted into a viscoelastic resin material, the braking torque in the damper 24 can be easily adjusted, and a stable braking torque can be obtained.
[0055]
Further, a compression spring 53 is compressed between the tip end portion of the rotary shaft 33 located on the inner bottom surface of the recess 28 and the inner end portion of the thrust member 42, and the thrust member 42 is moved by the extension spring force of the compression spring 53. Since it is biased to move in the axial direction, the compression spring 53 is disposed and accommodated in the recess 28 and is not exposed to the outside, so that the appearance of the assist grip G can be improved, and the compression spring 53 and the surrounding area are debris. It is difficult to attach the thrust grip 42 to the axial direction of the thrust member 42, and the operational stability of the assist grip G can be improved. Of course, as means for urging and thrusting the thrust member 42 in the axial direction, it is possible to employ a means other than the compression spring 53 having the internal structure. However, in view of the above effects, it is preferable to employ the compression spring 53 having the structure of the above embodiment.
[0056]
Further, since the rotary shaft 33 is fitted around the support shaft 9 and the thrust member 42 is fitted on the rotary shaft 33, the thrust member 42 is guided by the rotary shaft 33 in the axial direction. It can be moved smoothly and the operation is stabilized. Therefore, although the thrust member 42 can be moved in the axial direction without providing the rotating shaft 33, the rotating shaft 33 is provided as in the above embodiment in order to achieve smooth movement and stable operation. Is good.
[0057]
(Other embodiments)
In the above-described embodiment, the circumferential grooves 47 and 47 are provided on the front end surface of the bulging portion 36 on the inner surface 2a of the accommodating portion 2 on the grip body 1 side, that is, the rotation side, and the mounting seat 12 side, that is, the fixed side. Although the pin portions 44 and 44 are provided at the outer end portions of the thrust member 42, the present invention is not limited to this structure, and the positions of both are reversed, and the thrust member 42 on the mounting seat 12 side (fixed side) is reversed. A circumferential groove is provided in the outer end portion (for example, the outward flange portion 43), and a pin portion is provided on the front end surface of the bulging portion 36 on the inner surface 2a of the housing portion 2 on the grip body 1 side (rotation side). It may project, and there can exist the same operation effect as the above-mentioned embodiment.
[0058]
Moreover, in the said embodiment, although the circumferential groove 47 and the pin part 44 are each two, the circumferential groove 47 and the pin part 44 are good also as one, or three or more can also be provided, and the site | part to form What is necessary is just to change suitably according to the space of this. Further, the bottom surface 47a of the circumferential groove 47 and the tip of the pin portion 44 may be formed of a wear resistant material together with the base material, or may be formed of a wear resistant material separate from the base material. Thus, the damper effect can be obtained stably over a long period of time.
[0059]
Moreover, in the said embodiment, the latching groove 37 is formed in the inner side wall 2a of the accommodating part 2 in the 2nd leg part 1b of the grip main body 1, and the recessed part 28 of the support part 26 of the 2nd attachment seat 12 is made into the accommodating part 2. The base end of the rotating shaft 33 fitted into the recess 28 is engaged with the locking groove 37 while being opened toward the inner wall 2a. A groove is formed, the concave portion 28 of the support portion 26 of the second mounting seat 12 is opened toward the outer wall 2b of the accommodating portion 2, and the base end portion of the rotating shaft 33 fitted into the concave portion 28 is engaged with the locking groove. May be engaged. Moreover, in the said embodiment, although the support shaft 9 which connects the 2nd leg part 1b and the 2nd attachment seat 12 is penetrated from the outer side wall 2b of the accommodating part 2, the front-end | tip part is inserted in the inner side wall 2a. On the other hand, as described above, the support shaft can be inserted from the inner wall 2a of the housing portion 2 so that the distal end portion can be inserted into the outer wall 2b.
[0060]
【The invention's effect】
As described above, in the first aspect of the present invention, the pair of mounting seats that are mounted and fixed to the fixed body, the grip body that is pivotally supported by the leg portions, and the grip body is used. A rotation type retractable assist grip provided with a rotation urging means for urging and urging from the storage position to the retracted position. As a damper that suppresses the rotation from the storage position to the storage position, a recess is formed in the support portion of the mounting seat, the thrust member is formed in the recess, and the outer end portion located outside the recess is the storage portion of the leg portion of the grip body. A circumferential groove whose depth is changed is inserted into one of the outer end portion of the thrust member and the side wall of the accommodating portion on the grip body side so as to be non-rotatable and movable in the axial direction so as to face one side wall. And the pin part that moves in the circumferential groove on the other side Provided Re respectively so as to obtain a braking torque by sliding by the rotation of the grip body and a bottom surface and a pin portion of the circumferential groove and urges the thrust member axially pressed state. Therefore, according to the present invention, the rotation urging means is constituted by a spring such as a torsion coil spring, and the rotation urging torque gradually decreases in accordance with the rotation of the grip body from the use position to the storage position. When this happens, the braking torque of the damper also decreases to correspond to the decrease in the rotational biasing torque, and both decrease while maintaining a substantially constant difference. The braking torque corresponding to the rotation biasing torque of the rotation biasing means acts from the use position to the storage position, so that an inexpensive damper with a simple structure can be obtained without using a viscous agent. In addition, a stable braking torque can be obtained by the damper, and the operational stability of the assist grip can be improved.
[0061]
According to the invention of claim 2, the means for urging the thrust member in the axial direction is a compression spring that is compressed between the inner bottom surface of the recess and the inner end located in the recess of the thrust member. The compression spring can be disposed and accommodated in the recess to improve the appearance of the assist grip and the operational stability.
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view taken along the line II of FIG.
2 is an enlarged sectional view taken along line II-II in FIG.
3 is an enlarged sectional view taken along line III-III in FIG.
4 is a cross-sectional view taken along line IV-IV in FIG.
5 is a cross-sectional view taken along line VV in FIG.
6 is an enlarged sectional view taken along line VI-VI in FIG.
FIG. 7 is a characteristic diagram showing the relationship between the biasing torque of the torsion coil spring and the braking torque of the damper when the grip body rotates between the retracted position and the use position.
FIG. 8 is a perspective view showing the entire configuration of the retractable assist grip according to the embodiment of the present invention in a state where the grip body is in a use position.
[Explanation of symbols]
G Retractable assist grip
P Body panel (fixed body)
1 Grip body
1b Second leg
2 accommodating part
2a Inner wall
2b Outer wall
5 Bottomed shaft support hole
6 Through shaft support hole
7 Torsion coil spring (turning biasing means)
8 Support shaft
9 Support shaft
11 First mounting seat
12 Second mounting seat
24 Damper
26 Supporting part
28 recess
28a inner bottom
33 Rotating shaft
33c Shaft hole
40 caps
40a Spline hole
42 Thrust member
42a Spline part
44 Pin part
47 Circumferential groove
47a Bottom
53 Compression spring (Axial biasing means)

Claims

A pair of mounting seats fixed to the fixed body, a long grip body pivotally supported by the mounting seats at the legs, and the grip body rotating from the use position to the storage position In the retractable assist grip provided with the rotating biasing means for biasing,
The leg has a side wall facing the fixed body when the grip body is in the retracted position when the grip body is in the retracted position, and the attachment is performed in the retracted position of the grip body. A housing part for housing a part of the seat is formed by cutting out,
At least one of the pair of mounting seats is formed with a bottomed cylindrical support portion having a recess extending in the length direction of the grip body, and the opening of the recess has two openings of the housing portion. One of the side walls is located on the side wall, and the bottom is located on the other side wall,
Both ends of a support shaft that is fitted into the recess and penetrates the bottom of the recess in the axial direction are supported on both side walls of the housing portion,
A cylindrical thrust member is externally fitted on the support shaft so as to be relatively rotatable, and the thrust member has an outer end located outside the recess on the inner surface of the opening of the recess of the support portion. Is engaged and supported so as to be non-rotatable and movable in the axial direction so as to face the opening side wall of the recess in the axial direction,
One of the outer end side of the thrust member or the opening side wall of the recess in the accommodating portion is formed with an arc-shaped circumferential groove concentrically with the support shaft and extending in the circumferential direction,
On the other side of the opening end side wall of the recess in the outer end portion of the thrust member or the accommodating portion, a pin portion that is in sliding contact with the bottom surface of the circumferential groove is provided,
Axial biasing means for biasing the thrust member in the axial direction so that the pin portion is pressed against the bottom surface of the circumferential groove is provided,
As the grip body rotates from the use position to the storage position, the groove depth of the circumferential groove is changed so that the pressing force of the pin portion against the circumferential groove bottom surface by the axial urging means gradually decreases. Retractable assist grip characterized by

The retractable assist grip of claim 1,
The retractable assist grip, wherein the axial biasing means is a compression spring that is compressed between an inner bottom surface of the concave portion and an inner end portion located in the concave portion of the thrust member.