JP4694714B2

JP4694714B2 - Handrail folding device

Info

Publication number: JP4694714B2
Application number: JP2001133193A
Authority: JP
Inventors: 環余合; 雅司芝; 裕志桜田
Original assignee: 余合住金産業株式会社
Priority date: 2001-04-27
Filing date: 2001-04-27
Publication date: 2011-06-08
Anticipated expiration: 2021-04-27
Also published as: JP2002327522A

Description

【０００１】
【発明の属する技術分野】
本発明は、手摺の折畳装置に関する。
【０００２】
【従来の技術】
従来より、廊下、階段等には手摺が設置されている。この手摺は、壁面等の取付面に固定された支持アームの先端で支持固定され、通路側に突き出すように取り付けられている。
【０００３】
【発明が解決しようとする課題】
手摺の設置により通路幅が狭くなり、このため、例えば引越し等の際に幅広の家具、荷物等が廊下や階段から搬入・搬出できない場合がある。
【０００４】
本発明の課題は、家具、荷物等の搬入・搬出等を行う際にも廊下、階段等の通路を広く使える手摺の折畳装置を提供することにある。
【０００５】
【課題を解決するための手段及び作用・効果】
上記課題を解決するために、本発明に係る手摺の折畳装置は、
壁面等の取付面に固定される取付フレームと、
通路に沿って設置される手摺に連結されるとともに、その手摺を通路側に突出する使用位置と前記取付面に近接する折畳位置との間で回動可能に支持する支持アームと、
その支持アームを前記取付フレームに対し少なくとも前記使用位置において位置を固定する固定機構と、
を備え、
前記固定機構は、
前記支持アームと前記取付フレームとのうちの一方である第一部材に形成された固定用孔と、
前記支持アームと前記取付フレームとのうちの他方である第二部材を貫通して前記第一部材の固定用孔に係合する、頭部付の軸状固定部材と、
前記手摺の使用位置と折畳位置との間の前記支持アームの回動範囲に対応するように前記第二部材に形成され、前記軸状固定部材を貫通させた状態で該軸状固定部材が前記支持アームの回動範囲で前記第二部材に対し相対的に円弧移動することを許容する移動許容部と、
その移動許容部の両端部に、前記軸状固定部材の頭部の外形に対応して該頭部と嵌合可能にそれぞれ形成され、その頭部との嵌合状態では前記軸状固定部材が前記移動許容部内へ相対的に移行する円弧移動を阻止し、嵌合離脱状態ではその軸状固定部材が前記第一部材の固定用孔に係合した状態で、該軸状固定部材が前記移動許容部内へ相対的に移行する円弧移動を許容する頭部嵌合部とを含み、
前記軸状固定部材の頭部を前記第二部材の頭部嵌合部から離脱させ、かつその軸状固定部材と前記第一部材の固定用孔との係合状態を維持しつつ、前記支持アームを前記使用位置と折畳位置との間で回動させるのに伴って、前記軸状固定部材を前記移動許容部において相対的に移動させ、前記使用位置又は折畳位置において前記軸状固定部材の頭部を前記第二部材の頭部嵌合部に嵌合させることにより前記第一部材を前記第二部材に固定し、前記支持アームを介して前記手摺を前記使用位置又は折畳位置に固定することを特徴とする。
【０００６】
本発明によれば、手摺を使用位置から折畳位置に変位させて、固定機構により支持アームを取付フレームに位置固定するだけで、廊下、階段等の通路を本来の通路幅に近い状態で広く使えるので、幅広の家具、荷物等の搬入・搬出等が行いやすくなる。
【０００７】
そして、支持アーム及び取付フレームは、少なくとも使用位置において互いに当接して、手摺が支持アームの回動軸線周りに下向き回転することを阻止する当接面を各々備えることができる。
【０００８】
手摺を使用位置から折畳位置に変位させるために、固定機構による支持アームと取付フレームとの固定状態を解除したとき、支持アームと取付フレームとは互いの当接面を介して当接しているので、手摺や支持アームは自重によって支持アームの回動軸線周りに下向き回転することがない。つまり、固定機構による支持アームと取付フレームとの固定状態を解除する操作と、手摺を折畳位置に変位させ支持アームと取付フレームとを固定機構により固定する操作とを別々に行うことができ、位置決め・固定作業が容易に行えるとともに、手摺や支持アームが不意に回転落下することが防止される。したがって、複数の支持アームで支持されるような長尺の手摺の場合でも、これらの操作手順を踏むことによって、手摺を使用位置から折畳位置に変位させる作業を１人で行うことができる。また、手摺を折畳位置から使用位置に変位させる場合には、手摺を使用位置に変位させた状態で支持アームと取付フレームとを互いの当接面で当接させておき、続いて支持アームと取付フレームとを固定機構により固定することができる。
【０００９】
以上の場合には、支持アーム及び取付フレームに形成される当接面が使用位置において互いに当接した状態で、固定機構が支持アームと取付フレームとを位置固定及び固定解除可能に結合していることが望ましい。手摺を使用位置から折畳位置に変位させるとき、使用位置において支持アームと取付フレームとの当接面が互いに当接した状態を維持しながら、固定機構による支持アームと取付フレームとの固定状態を解除できるので、固定解除のために支持アームを持ち上げたりする作業上の煩わしさや危険性等を回避することができる。同様に、手摺を折畳位置から使用位置に変位させる場合には、手摺を使用位置に変位させた状態で支持アームと取付フレームとを互いの当接面で当接させ、この状態を維持しながら支持アームと取付フレームとを固定機構により固定することができる。
【００１０】
【発明の実施の形態】
以下、本発明の実施の形態を図面に示す実施例を参照して説明する。図１は本発明の一実施例である手摺の折畳装置の正面図及び側面図、図２は側面断面図である。図１に示すように、この手摺の折畳装置は、通路Ｒに沿って設置される円柱状の手摺Ｈを一端側で支持する支持アーム１０と、壁面等の取付面Ｆに固定される取付フレーム２０と、支持アーム１０の他端側を取付フレーム２０に位置固定する固定機構（図６にて後述する）とを備えている。また支持アーム１０の他端側は、手摺Ｈの設置方向とほぼ平行な支点軸４０（回動軸線Ｏ）周りに回動可能に取付フレーム２０に取り付けられ、さらに、手摺Ｈが通路Ｒ側に突出する使用位置と取付面Ｆと近接する折畳位置とに変位した状態で、上記固定機構が支持アーム１０を取付フレーム２０に位置固定している。
【００１１】
なお、以下の実施例の記載において、支持アーム１０に対して、手摺Ｈが固定支持されている側を上端側（上方側）、取付フレーム２０が取り付けられている側を下端側（下方側）という。
【００１２】
本発明に係る手摺の折畳装置の主要部をなす支持アーム１０及び取付フレーム２０は、金属、プラスチック等の一体成形によって製造されるのが一般的である。ここで、図４及び図５を参照して、支持アーム１０と取付フレーム２０の構造を概説する。
【００１３】
まず図４に表わされた支持アーム１０は、支持部１１と本体部１２とを有する。本体部１２は、正面及び側面で見て一端側（上端部側）ほど幅狭のテーパを有しており、その上端部側に連結された支持部１１は、手摺Ｈの設置方向（軸線Ｏ方向；図１参照）から見て三日月形あるいは円弧状の受け面１１ａを有し、支持部１１の外面から受け面１１ａに複数（例えば２個）の支持部挿通孔１１ｂが設けられている。
【００１４】
一方、本体部１２の他端側（下端部側）には、第一軸孔１２ａが支持部１１の受け面１１ａとほぼ平行に形成される。本体部１２の下端部には、第一軸孔１２ａからさらに下方へ一定距離隔てた位置に、第一軸孔１２ａとほぼ平行にねじ孔１２ｂが形成される。また、第一軸孔１２ａを挟んで支持部１１の反対側（取付面Ｆ側；図１参照）に延出した本体部１２の上端面には、第一軸孔１２ａとほぼ平行にアーム側当接面１２ｃが形成される。
【００１５】
また、図５に示す取付フレーム２０は、平板状の取付部２１と、取付部２１の一方の端面に形成される２つの平行な側壁部２２，２３及び膨出部２４とを有する。取付部２１には、１又は複数（例えば４個）の取付部挿通孔２１ａが形成されている。また、両側壁部２２，２３と膨出部２４とで囲まれた取付部２１の中央部分は、周辺部分よりも肉薄とされて凹部２１ｂを形成し、支持アーム１０の本体部１２の回動範囲を大きく取れるようにしている（図２参照）。
【００１６】
取付部２１からほぼ直立状に立ち上がる２つの平行な側壁部２２，２３には、上記した支持アーム１０の第一軸孔１２ａと軸心を共通にする第二軸孔２２ａ，２３ａが各々形成されている。また、片側（図５（ａ）に示す正面図では右側）の側壁部２２の下端部には、第二軸孔２２ａから下方へ一定距離隔てた２つの位置に、後述する頭部嵌合部を構成する挿通孔２２ｂ，２２ｃがそれぞれ第二軸孔２２ａとほぼ平行に形成される。これらの挿通孔２２ｂ，２２ｃは、上記した支持アーム１０のねじ孔１２ｂと第二軸孔２２ａ（第一軸孔１２ａ）からの離間距離を共通にする。なお、２２ｄは両挿通孔２２ｂ，２２ｃを連結する円弧状溝である。また、２つの挿通孔２２ｂ，２２ｃのうちの一方の挿通孔２２ｃの軸心を、第二軸孔２２ａの軸心から下ろした鉛直線上又はその近傍に位置させて、第二軸孔２２ａと挿通孔２２ｃの取付面Ｆからの距離をほぼ等しく設定してある。これにより、使用位置と折畳位置との間の支持アーム１０の回転角を確保しつつ、側壁部２２，２３の通路Ｒ側への張り出し幅を小さくしてある。
【００１７】
さらに、取付部２１からほぼ直立状に立ち上がるとともに、両側壁部２２，２３の一端側（上端側）を連結する形で膨出部２４が設けられる。そして、膨出部２４の立ち上がり壁を形成するいずれかの面（実施例では下端面）には、上記した支持アーム１０に形成されたアーム側当接面１２ｃに対向し、かつ後述する特定条件のもとでアーム側当接面１２ｃに当接するフレーム側当接面２４ａが形成される。
【００１８】
図１に戻り、手摺の支持構造について詳細説明する。手摺Ｈは、支持アーム１０の支持部１１の受け面１１ａで保持され、支持部挿通孔１１ｂに挿入された止めねじ１９により支持部１１に固定されている。また、取付フレーム２０は、取付部２１の取付部挿通孔２１ａに挿入された取付ねじ２９により取付面Ｆに締め付け固定されている。
【００１９】
支持アーム１０の本体部１２の下端部には、取付フレーム２０の側壁部２２，２３が両側から挟むように位置して、支持アーム１０を支持するための取付ブラケットを構成している。支持アーム１０の本体部１２に形成された第一軸孔１２ａと、取付フレーム２０の両側壁部２２，２３に各々形成された第二軸孔２２ａ，２３ａとに支点軸４０が挿入され、支持アーム１０が手摺Ｈの設置方向とほぼ平行な回動軸線Ｏ周りに回動可能に取り付けられている。
【００２０】
次に、図６及び図１を参照して、支持アーム１０を取付フレーム２０に対して位置決めし固定する固定機構について説明する。本実施例の固定機構は、支持アーム１０（第一部材）の本体部１２に形成されたねじ孔１２ｂ（固定用孔）と、そのねじ孔１２ｂに螺合する小ねじ、ボルト等のおねじ部材３１（軸状固定部材）と、取付フレーム２０（第二部材）の一方の側壁部２２に形成される円弧状溝２２ｄ（移動許容部）と、その円弧状溝２２ｄの両端部にそれぞれ形成される頭部嵌合部２２ｂ，２２ｃとを有している。
【００２１】
おねじ部材３１は、取付フレーム２０の側壁部２２を貫通して支持アーム１０のねじ孔１２ｂに螺合し、テーパー状に縮径して軸部につながる頭部を備える。また、円弧状溝２２ｄは、手摺Ｈの使用位置と折畳位置との間の支持アーム１０の回動範囲に対応するように取付フレーム２０の側壁部２２に形成され、おねじ部材３１を貫通させた状態で、おねじ部材３１が支持アーム１０の回動範囲で取付フレーム２０に対し相対的に円弧移動することを許容する。さらに、頭部嵌合部２２ｂ，２２ｃは、円弧状溝２２ｄの両端部に、おねじ部材３１の頭部の外形に対応して頭部と嵌合可能にそれぞれ形成されている。そして、頭部嵌合部２２ｂ，２２ｃは、おねじ部材３１の頭部との嵌合状態ではおねじ部材３１が円弧状溝２２ｄ内へ相対的に移行する円弧移動を阻止し（図６（ａ））、嵌合離脱状態ではそのおねじ部材３１が支持アーム１０のねじ孔１２ｂに螺合した状態で、おねじ部材３１が円弧状溝２２ｄ内へ相対的に移行する円弧移動を許容する（図６（ｂ））。
【００２２】
さらに具体的には、頭部嵌合部２２ｂ，２２ｃはおねじ部材３１の頭部に対応するテーパー状の内面を有し、取付フレーム２０に形成された円弧状溝２２ｄは、そのテーパー状の頭部嵌合部２２ｂ，２２ｃの大径部より幅が狭く、おねじ部材３１の軸部より幅が広く構成され、この円弧状溝２２ｄは支持アーム１０の回動軸線Ｏを中心とする円弧に沿って形成されている。
【００２３】
以上のように取り付けられた手摺Ｈは、通路Ｒ側に突出する使用位置と取付面Ｆと近接する折畳位置とに次のようにして変位調節される。まず、手摺Ｈが使用位置にあるときについて説明する。上記使用位置において、支持アーム１０の本体部１２に形成されたアーム側当接面１２ｃは、取付フレーム２０の膨出部２４に形成されたフレーム側当接面２４ａと互いに当接している。これにより、おねじ部材３１を緩めたときでも、手摺Ｈ及び支持アーム１０が自重により支点軸４０の回動軸線Ｏ周りに下向き（取付面Ｆから遠ざかり通路Ｒ側に倒れる方向）に回動することが阻止されている（図２参照）。
【００２４】
その状態において、手摺Ｈの折畳位置への変位調節は次のようにしてなされる。おねじ部材３１を少し緩めてその頭部を取付フレーム２０（側壁部２２）の頭部嵌合部２２ｂから離脱させる（図６（ｂ）参照）。おねじ部材３１と支持アーム１０（本体部１２）のねじ孔１２ｂとの螺合状態を維持しつつ、支持アーム１０を使用位置から折畳位置へ回動させるのに伴って、おねじ部材３１を円弧状溝２２ｄに沿って相対的に移動させる。そして、折畳位置においておねじ部材３１を支持アーム１０のねじ孔１２ｂに締め込むことにより、おねじ部材３１の頭部を取付フレーム２０の頭部嵌合部２２ｃに嵌合させて支持アーム１０を取付フレーム２０に固定し、支持アーム１０を介して手摺Ｈを折畳位置に固定する（図３参照）。
【００２５】
なお、手摺Ｈを支持アーム１０とともに上向き（取付面Ｆに近づく方向）に回転させて折畳位置に移動させたとき、手摺Ｈの重心位置Ｇ（円柱状又は円筒状の場合は断面中心）は支点軸４０の軸線Ｏの位置よりも取付面Ｆ側に偏位量ｅだけ偏位する状態となる（図３参照）。これにより、手摺Ｈ及び支持アーム１０は下向き（取付面Ｆから遠ざかり通路Ｒ側に倒れる方向）に逆回転することなく、ほぼ図３の状態を維持している。
【００２６】
また、手摺Ｈを使用位置へ変位調節するときは、以上と逆の手順で行えばよい。手摺Ｈを使用位置に移動させたときにも、支持アーム１０の本体部１２に形成されたアーム側当接面１２ｃは、取付フレーム２０の膨出部２４に形成されたフレーム側当接面２４ａと互いに当接し、手摺Ｈ及び支持アーム１０が回動軸線Ｏ周りに下向き回動することが阻止されている。
【００２７】
このように、固定機構のおねじ部材３１（軸状固定部材）の頭部を取付フレーム２０の頭部嵌合部２２ｂ，２２ｃから離脱させることにより、支持アーム１０を使用位置と折畳位置との間で回動させることができ、簡単な操作で手摺Ｈの位置調整が行える。したがって、複数の支持アーム１０で支持されるような長尺の手摺Ｈの場合でも、支持アーム１０の取付フレーム２０への位置固定作業を１人で行うことも可能となる。
【００２８】
しかも、本実施例では、おねじ部材３１を少し緩めるだけで、その頭部を頭部嵌合部２２ｂ，２２ｃから離脱させることができ、手摺Ｈの位置調整が一層簡単に行える。この場合、おねじ部材３１を用いることにより、支持アーム１０と取付フレーム２０とをねじによりがたつきなく強固に結合することができ、特に使用位置において、手摺Ｈを把持する者に不安感や恐怖心を与えることが少ない。
【００２９】
なお、アーム側当接面１２ｃは、支持アーム１０の第一軸孔１２ａ（軸線Ｏ）よりも取付面Ｆ側の本体部１２に形成されているので、アーム側当接面１２ｃ及びフレーム側当接面２４ａが第一軸孔１２ａ（第二軸孔２２ａ）よりも通路Ｒ側に突出せず、小型コンパクトな手摺の折畳装置が得られる。また、フレーム側当接面２４ａが形成される膨出部２４は、両側壁部２２，２３を連結する形で設けられているので、アーム側当接面１２ｃとフレーム側当接面２４ａとの当接構造を堅牢に構成することができる。
【００３０】
ところで、取付フレーム２０の他方の側壁部２３にも、側壁部２２に形成された円弧状溝２２ｄ及び頭部嵌合部２２ｂ，２２ｃと同様の円弧状溝及び頭部嵌合部を形成してもよい。この場合には、ねじ孔１２ｂが本体部１２を貫通するように設け、この貫通状のねじ孔１２ｂに対して、おねじ部材３１と同様の他のおねじ部材を側壁部２３側から螺合することができる。したがって、本体部１２のねじ孔１２ｂに対して、側壁部２２側から螺合されるおねじ部材３１と側壁部２３側から螺合される別のおねじ部材とによって、支持アーム１０が取付フレーム２０に位置決め・固定され、より強固な固定機構となる。
【００３１】
次に、図７は図６に示す固定機構の変更例を示している。図７では、図６のおねじ部材３１に代わる頭部付きのロックピン３１’（軸状固定部材）が、取付フレーム２０（側壁部２２）を貫通して支持アーム１０（本体部２２）の係合孔１２ｂ’（固定用孔）に係合している。また、取付フレーム２０の円弧状溝２２ｄ（移動許容部）の両端部に形成される頭部嵌合部２２ｂ’，２２ｃ’（図７では２２ｂ’のみ現れる）は、ロックピン３１’の頭部に形成される凹部と嵌合可能な凸部を有している。これにより、頭部嵌合部２２ｂ’の凸部は、ロックピン３１’の凹部との嵌合状態ではロックピン３１’が円弧状溝２２ｄ内へ相対的に移行する円弧移動を阻止し（図７（ａ））、嵌合離脱状態ではロックピン３１’が取付フレーム２０の係合孔１２ｂ’に係合した状態で、ロックピン３１’が円弧状溝２２ｄ内へ相対的に移行する円弧移動を許容する（図７（ｂ））。なお、ロックピン３１’に凸部を、頭部嵌合部２２ｂ’に凹部をそれぞれ設けてもよい。
【００３２】
したがって、ロックピン３１’（軸状固定部材）の頭部を取付フレーム２０の頭部嵌合部２２ｂ’，２２ｃ’から離脱させることにより、支持アーム１０を使用位置と折畳位置との間で回動させることができ、前述の実施例同様簡単な操作で手摺Ｈの位置調整が行える。また、軸状固定部材としてロックピン３１’を用いる場合には、着脱作業が迅速に行える利点がある。
【００３３】
図８〜図１０には、図１〜図３に示す手摺の折畳装置の変更例を示している。図８では、支持アームを取付フレームに対して回動可能に取り付ける際の支持方法を次のように変更している。すなわち、支持アーム１１０（第二部材）の本体部１１２の下端部を二股状の取付ブラケット１１２Ｒ，１１２Ｌで構成し、この取付ブラケット１１２Ｒ，１１２Ｌは取付フレーム１２０（第一部材）の中央突出部１２５を両側から挟むように位置している。
【００３４】
そして、この実施例では、支持アーム１１０の本体部１１２（右ブラケット１１２Ｒ）に形成された円弧状溝１１２ｈ（移動許容部）の両端部に、使用位置と折畳位置とに対応させて頭部嵌合部１１２ｆ，１１２ｇを形成し、取付フレーム１２０の中央突出部１２５に形成されたねじ孔１２５ｂ（固定用孔）におねじ部材３１が螺合される。
【００３５】
おねじ部材３１は、支持アーム１１０の一方の取付ブラケット１１２Ｒを貫通して取付フレーム１２０のねじ孔１２５ｂに螺合し、テーパー状に縮径して軸部につながる頭部を備える。また、円弧状溝１１２ｈは、手摺Ｈの使用位置と折畳位置との間の支持アーム１１０の回動範囲に対応するように支持アーム１１０の取付ブラケット１１２Ｒに形成され、おねじ部材３１を貫通させた状態で、おねじ部材３１が支持アーム１０の回動範囲で支持アーム１１０に対し相対的に円弧移動することを許容する。さらに、頭部嵌合部１１２ｆ，１１２ｇは、円弧状溝１１２ｈの両端部に、おねじ部材３１の頭部の外形に対応して頭部と嵌合可能にそれぞれ形成されている。そして、頭部嵌合部１１２ｆ，１１２ｇは、おねじ部材３１の頭部との嵌合状態ではおねじ部材３１が円弧状溝１１２ｈ内へ相対的に移行する円弧移動を阻止し、嵌合離脱状態ではそのおねじ部材３１が取付フレーム１２０のねじ孔１２５ｂに螺合した状態で、おねじ部材３１が円弧状溝１１２ｈ内へ相対的に移行する円弧移動を許容する。
【００３６】
さらに具体的には、頭部嵌合部１１２ｆ，１１２ｇはおねじ部材３１の頭部に対応するテーパー状の内面を有し、支持アーム１１０に形成された円弧状溝１１２ｈは、そのテーパー状の頭部嵌合部１１２ｆ，１１２ｇの大径部より幅が狭く、おねじ部材３１の軸部より幅が広く構成され、この円弧状溝１１２ｈは支持アーム１０の回動軸線Ｏを中心とする円弧に沿って形成されている。
【００３７】
この実施例においても、固定機構のおねじ部材３１（軸状固定部材）の頭部を支持アーム１１０の頭部嵌合部１１２ｆ，１１２ｇから離脱させることにより、支持アーム１０を使用位置と折畳位置との間で回動させることができ、手摺Ｈの位置調整が行える。
【００３８】
なお、アーム側当接面１１２ｉは、取付フレーム１２０の取付部１２１に形成されたフレーム側当接面１２１ｃと、軸孔１１２Ｒａ，１１２Ｌａよりも取付面Ｆ側で互いに当接している。
【００３９】
さらに、図１１は図１の固定機構の他の変形例を示す。この固定機構は、外面に開口する溝（スリット）と、この溝に軸状部材として挿入される柱状（例えば円柱状）又は筒状（例えば円筒状）の固定ピンとを有する。具体的には、支持アーム１０の本体部１２の下端部外面に、使用位置と折畳位置とに対応させて形成された２個の溝１２ｄ，１２ｅが開口している。一方、取付フレーム２０の両側壁部２２，２３の下端部外面には、側面視でほぼ同じ位置に各溝２２ｅ，２３ｅが開口している。図６（ａ）のように、支持アーム１０の溝１２ｅを取付フレーム２０の各溝２２ｅ，２３ｅと位置合わせし、固定ピン３２でこれらの溝１２ｅ，２２ｅ，２３ｅを貫いて挿入すると、手摺Ｈが使用位置に固定される。同様に、固定ピン３２で溝１２ｄ，２２ｅ，２３ｅを貫いて挿入すると、手摺Ｈが折畳位置に固定される。この場合、固定ピン３２が挿入されるのは、外面に開口する溝（スリット）でなくても、断面円形等の挿通孔であってもよい。
【００４０】
このように、固定機構に固定ピン３２を用いる場合には、着脱作業が迅速に行える利点がある。また、外面に開口する溝（スリット）との組み合わせにより、着脱作業が一層迅速に行える。
【００４１】
なお、図７〜図１１の各変更例において、図１と共通する部分には同一の符号を付して詳細な説明を省略する。
【００４２】
ところで、軸状固定部材として、おねじ部材３１やロックピン３１’等を例示して説明してきたが、これら以外にも例えばくさび、キー等を用いることができる。
【００４３】
さらに、固定機構としては、ここまで説明してきた軸状部材以外に、クランプ等を用いた締め付け機構、ばね等の弾発作用を利用した弾発機構等既知の各種機構を用いてもよい。
【００４４】
そして、例えば長尺の手摺に本発明を適用する場合には、本発明に係る手摺の折畳装置を手摺の長手方向に沿って複数配設すればよい。
【図面の簡単な説明】
【図１】本発明に係る手摺の折畳装置の一例を示す正面図及び側面図。
【図２】図１（ａ）のＡ−Ａ断面図。
【図３】図１（ｂ）において手摺を折畳位置に変位させたときの側面図。
【図４】支持アームの正面半断面図及び側面図。
【図５】取付フレームの正面図及び側面図。
【図６】図１（ｂ）のＢ−Ｂ断面図。
【図７】図６の変形例を示す断面図。
【図８】図１の変形例を示す正面図及び側面図。
【図９】図８（ａ）のＣ−Ｃ断面図。
【図１０】図８（ｂ）において手摺を折畳位置に変位させたときの側面図。
【図１１】図１の固定機構の他の変形例を示す側面図及び分解側面図。
【符号の説明】
１０支持アーム（第一部材）
２０取付フレーム（第二部材）
１１０支持アーム（第二部材）
１２０取付フレーム（第一部材）
１２ｂ，１２５ｂねじ孔（固定用孔）
１２ｃ，１１２ｉアーム側当接面
２２ｂ，２２ｃ，１１２ｆ，１１２ｇ頭部嵌合部
２２ｄ，１１２ｈ円弧状溝（移動許容部）
２４ａ，２１ｃフレーム側当接面
３１おねじ部材（軸状固定部材）
３１’ ロックピン（軸状固定部材）
Ｈ手摺
Ｆ取付面
Ｒ通路
Ｏ回動軸線[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a handrail folding device.
[0002]
[Prior art]
Conventionally, handrails are installed in hallways, stairs and the like. The handrail is supported and fixed at the tip of a support arm fixed to a mounting surface such as a wall surface and attached so as to protrude toward the passage.
[0003]
[Problems to be solved by the invention]
The width of the passage is narrowed by the installation of the handrail. For this reason, for example, when moving, wide furniture, luggage, etc. may not be able to be carried in and out of the corridor or stairs.
[0004]
An object of the present invention is to provide a handrail folding device that can widely use passages such as corridors and stairs when carrying in and out furniture, luggage, and the like.
[0005]
[Means for solving the problems and actions / effects]
In order to solve the above problems, a handrail folding device according to the present invention includes:
A mounting frame fixed to a mounting surface such as a wall;
A support arm connected to a handrail installed along the passage, and supporting the handrail so as to be rotatable between a use position protruding toward the passage and a folding position close to the mounting surface;
A fixing mechanism for fixing the position of the support arm at least in the use position with respect to the mounting frame;
Equipped with a,
The fixing mechanism is
A fixing hole formed in a first member which is one of the support arm and the mounting frame;
A shaft-shaped fixing member with a head that penetrates the second member, which is the other of the support arm and the mounting frame, and engages the fixing hole of the first member;
The shaft-shaped fixing member is formed in the second member so as to correspond to a rotation range of the support arm between the use position and the folding position of the handrail, and the shaft-shaped fixing member penetrates the shaft-shaped fixing member. A movement allowing portion for allowing the arc to move relative to the second member within a rotation range of the support arm;
At both end portions of the movement allowing portion, the shaft-shaped fixing member is formed so as to be fitted to the head corresponding to the outer shape of the head of the shaft-shaped fixing member. The arc-shaped movement that relatively moves into the movement-permitting portion is prevented, and in the fitted and detached state, the shaft-shaped fixing member is engaged with the fixing hole of the first member, and the shaft-shaped fixing member is moved. Including a head fitting portion that allows arc movement to move relatively into the allowable portion,
The head of the shaft-like fixing member is detached from the head fitting portion of the second member, and the supporting state is maintained while maintaining the engagement state between the shaft-like fixing member and the fixing hole of the first member. As the arm is rotated between the use position and the folding position, the shaft-shaped fixing member is relatively moved at the movement allowing portion, and the shaft-shaped fixing is performed at the use position or the folding position. The first member is fixed to the second member by fitting the head of the member to the head fitting portion of the second member, and the handrail is moved to the use position or the folding position via the support arm. It is characterized by being fixed to .
[0006]
According to the present invention, by simply shifting the handrail from the use position to the folding position and fixing the support arm to the mounting frame by the fixing mechanism, the passages such as the corridor and the stairs are widened in a state close to the original passage width. Since it can be used, it becomes easier to carry in and out of wide furniture and luggage.
[0007]
The support arm and the attachment frame can each be provided with a contact surface that abuts each other at least at the use position and prevents the handrail from rotating downward around the rotation axis of the support arm.
[0008]
In order to displace the handrail from the use position to the folding position, when the fixed state of the support arm and the mounting frame by the fixing mechanism is released, the support arm and the mounting frame are in contact with each other via the contact surfaces. Therefore, the handrail or the support arm does not rotate downward around the rotation axis of the support arm due to its own weight. That is, the operation of releasing the fixed state of the support arm and the mounting frame by the fixing mechanism and the operation of displacing the handrail to the folding position and fixing the support arm and the mounting frame by the fixing mechanism can be performed separately. Positioning and fixing can be easily performed, and the handrail and the support arm are prevented from rotating and dropping unexpectedly. Therefore, even in the case of a long handrail that is supported by a plurality of support arms, the operation of displacing the handrail from the use position to the folding position can be performed by one person by following these operating procedures. In addition, when the handrail is displaced from the folding position to the use position, the support arm and the mounting frame are brought into contact with each other with the handrail being displaced to the use position, and then the support arm is moved. And the mounting frame can be fixed by a fixing mechanism.
[0009]
In the above case, the fixing mechanism couples the support arm and the mounting frame so that they can be fixed and released in a state where the contact surfaces formed on the support arm and the mounting frame are in contact with each other at the use position. It is desirable. When the handrail is displaced from the use position to the folding position, the fixed state of the support arm and the mounting frame by the fixing mechanism is maintained while maintaining the state where the contact surfaces of the support arm and the mounting frame are in contact with each other at the use position. Since it can be released, it is possible to avoid the troublesomeness and danger of lifting the support arm for releasing the fixation. Similarly, when the handrail is displaced from the folding position to the use position, the support arm and the mounting frame are brought into contact with each other with the handrail being displaced to the use position, and this state is maintained. However, the support arm and the mounting frame can be fixed by the fixing mechanism.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to examples shown in the drawings. FIG. 1 is a front view and a side view of a handrail folding apparatus according to an embodiment of the present invention, and FIG. 2 is a side sectional view. As shown in FIG. 1, this handrail folding device includes a support arm 10 that supports a columnar handrail H installed along a passage R on one end side, and an attachment fixed to an attachment surface F such as a wall surface. A frame 20 and a fixing mechanism (described later in FIG. 6) for fixing the other end side of the support arm 10 to the mounting frame 20 are provided. Further, the other end side of the support arm 10 is attached to the attachment frame 20 so as to be rotatable around a fulcrum shaft 40 (rotation axis O) substantially parallel to the installation direction of the handrail H, and the handrail H is further moved to the passage R side. The fixing mechanism fixes the support arm 10 to the mounting frame 20 in a state of being displaced between the protruding usage position and the folding position close to the mounting surface F.
[0011]
In the description of the following embodiments, the side on which the handrail H is fixedly supported with respect to the support arm 10 is the upper end side (upper side), and the side on which the mounting frame 20 is attached is the lower end side (lower side). That's it.
[0012]
The support arm 10 and the mounting frame 20 that form the main part of the handrail folding device according to the present invention are generally manufactured by integral molding of metal, plastic, or the like. Here, with reference to FIG.4 and FIG.5, the structure of the support arm 10 and the attachment frame 20 is outlined.
[0013]
First, the support arm 10 shown in FIG. 4 has a support portion 11 and a main body portion 12. The main body 12 has a taper that is narrower at one end side (upper end side) when viewed from the front and side, and the support portion 11 connected to the upper end side is installed in the direction in which the handrail H is installed (axis O The bearing surface 11a has a crescent or arc shape when viewed from the direction (see FIG. 1), and a plurality of (for example, two) support portion insertion holes 11b are provided from the outer surface of the support portion 11 to the receiving surface 11a.
[0014]
On the other hand, on the other end side (lower end portion side) of the main body portion 12, a first shaft hole 12 a is formed substantially parallel to the receiving surface 11 a of the support portion 11. A screw hole 12b is formed in the lower end portion of the main body portion 12 at a position further apart from the first shaft hole 12a by a predetermined distance and substantially parallel to the first shaft hole 12a. Further, the upper end surface of the main body portion 12 extending to the opposite side of the support portion 11 (attachment surface F side; see FIG. 1) across the first shaft hole 12a is on the arm side substantially parallel to the first shaft hole 12a. A contact surface 12c is formed.
[0015]
The mounting frame 20 shown in FIG. 5 includes a flat mounting portion 21 and two parallel side wall portions 22 and 23 and a bulging portion 24 formed on one end face of the mounting portion 21. One or a plurality of (for example, four) attachment portion insertion holes 21 a are formed in the attachment portion 21. Further, the central portion of the mounting portion 21 surrounded by the side wall portions 22 and 23 and the bulging portion 24 is thinner than the peripheral portion to form a concave portion 21b, and the main body portion 12 of the support arm 10 is rotated. The range is made large (see FIG. 2).
[0016]
The two parallel side wall portions 22 and 23 that rise substantially upright from the mounting portion 21 are respectively formed with second shaft holes 22a and 23a that have the same shaft center as the first shaft hole 12a of the support arm 10 described above. ing. Further, at the lower end portion of the side wall portion 22 on one side (right side in the front view shown in FIG. 5A), a head fitting portion described later is provided at two positions spaced apart from the second shaft hole 22a by a certain distance. Are formed substantially parallel to the second shaft hole 22a. These insertion holes 22b and 22c share the same distance from the screw hole 12b of the support arm 10 and the second shaft hole 22a (first shaft hole 12a). Reference numeral 22d denotes an arcuate groove that connects both the insertion holes 22b and 22c. Further, the shaft center of one of the two insertion holes 22b and 22c is positioned on or near the vertical line that is lowered from the axis of the second shaft hole 22a, and is inserted into the second shaft hole 22a. The distance from the mounting surface F of the hole 22c is set to be approximately equal. Thereby, the overhang | projection width to the channel | path R side of the side wall parts 22 and 23 is made small, ensuring the rotation angle of the support arm 10 between a use position and a folding position.
[0017]
Further, the bulging portion 24 is provided so as to rise almost upright from the mounting portion 21 and to connect one end side (upper end side) of both side wall portions 22 and 23. Then, any surface (the lower end surface in the embodiment) that forms the rising wall of the bulging portion 24 faces the arm-side contact surface 12c formed on the support arm 10 described above, and a specific condition described later A frame-side contact surface 24a that contacts the arm-side contact surface 12c is formed.
[0018]
Returning to FIG. 1, the support structure of the handrail will be described in detail. The handrail H is held by the receiving surface 11a of the support portion 11 of the support arm 10, and is fixed to the support portion 11 by a set screw 19 inserted into the support portion insertion hole 11b. The mounting frame 20 is fastened and fixed to the mounting surface F by mounting screws 29 inserted into the mounting portion insertion holes 21 a of the mounting portion 21.
[0019]
An attachment bracket for supporting the support arm 10 is configured at the lower end of the main body 12 of the support arm 10 so that the side walls 22 and 23 of the attachment frame 20 are sandwiched from both sides. The fulcrum shaft 40 is inserted into the first shaft hole 12a formed in the main body portion 12 of the support arm 10 and the second shaft holes 22a and 23a formed in the both side wall portions 22 and 23 of the mounting frame 20, respectively. The arm 10 is attached so as to be rotatable around a rotation axis O substantially parallel to the installation direction of the handrail H.
[0020]
Next, a fixing mechanism for positioning and fixing the support arm 10 with respect to the mounting frame 20 will be described with reference to FIGS. 6 and 1. The fixing mechanism of the present embodiment includes a screw hole 12b (fixing hole) formed in the main body 12 of the support arm 10 (first member), and a small screw, a male screw or the like screwed into the screw hole 12b. A member 31 (shaft-shaped fixing member), an arc-shaped groove 22d (movement allowing portion) formed on one side wall 22 of the mounting frame 20 (second member), and formed at both ends of the arc-shaped groove 22d, respectively. Head fitting portions 22b and 22c.
[0021]
The male screw member 31 includes a head that penetrates the side wall portion 22 of the mounting frame 20 and is screwed into the screw hole 12b of the support arm 10, and is reduced in a taper shape and connected to the shaft portion. The arc-shaped groove 22d is formed in the side wall portion 22 of the mounting frame 20 so as to correspond to the rotation range of the support arm 10 between the use position and the folding position of the handrail H, and penetrates the male screw member 31. In this state, the male screw member 31 is allowed to move in a circular arc relative to the mounting frame 20 within the rotation range of the support arm 10. Further, the head fitting portions 22b and 22c are formed at both end portions of the arc-shaped groove 22d so as to be fitted to the head corresponding to the outer shape of the head of the male screw member 31, respectively. The head fitting portions 22b and 22c prevent arc movement in which the male screw member 31 relatively moves into the arc-shaped groove 22d in the fitted state with the head of the male screw member 31 (FIG. 6 ( a)) In the fitted and detached state, with the male screw member 31 screwed into the screw hole 12b of the support arm 10, the circular movement in which the male screw member 31 moves relatively into the arc-shaped groove 22d is allowed. (FIG. 6B).
[0022]
More specifically, the head fitting portions 22b and 22c have a tapered inner surface corresponding to the head of the male screw member 31, and the arc-shaped groove 22d formed in the mounting frame 20 has the tapered head. The part fitting parts 22b and 22c are narrower than the large diameter part and wider than the shaft part of the male screw member 31, and the arc-shaped groove 22d is formed in an arc centered on the rotation axis O of the support arm 10. Are formed along.
[0023]
The handrail H attached as described above is displaced and adjusted between the use position protruding toward the passage R and the folding position close to the attachment surface F as follows. First, the case where the handrail H is in the use position will be described. In the use position, the arm-side contact surface 12 c formed on the main body portion 12 of the support arm 10 is in contact with the frame-side contact surface 24 a formed on the bulging portion 24 of the mounting frame 20. As a result, even when the male screw member 31 is loosened, the handrail H and the support arm 10 rotate downward about the rotation axis O of the fulcrum shaft 40 due to their own weight (a direction in which the handrail H and the support arm 10 are moved away from the mounting surface F and fall toward the passage R). This has been prevented (see FIG. 2).
[0024]
In this state, displacement adjustment of the handrail H to the folding position is performed as follows. The male screw member 31 is loosened slightly and its head portion is detached from the head fitting portion 22b of the mounting frame 20 (side wall portion 22) (see FIG. 6B). As the support arm 10 is rotated from the use position to the folded position while the screwed state of the male screw member 31 and the screw hole 12b of the support arm 10 (main body portion 12) is maintained, the male screw member 31 is rotated. Is relatively moved along the arc-shaped groove 22d. Then, by tightening the male screw member 31 into the screw hole 12b of the support arm 10 in the folding position, the head of the male screw member 31 is fitted to the head fitting portion 22c of the mounting frame 20 to support the support arm 10. Is fixed to the mounting frame 20, and the handrail H is fixed to the folding position via the support arm 10 (see FIG. 3).
[0025]
When the handrail H is rotated together with the support arm 10 upward (in the direction approaching the mounting surface F) and moved to the folding position, the center of gravity G of the handrail H (the center of the cross section in the case of a columnar or cylindrical shape) is It will be in the state which deviates by the deviation | shift amount e from the position of the axis line O of the fulcrum shaft 40 to the attachment surface F side (refer FIG. 3). Thereby, the handrail H and the support arm 10 maintain the state of FIG. 3 substantially without reversely rotating downward (in a direction away from the mounting surface F and falling toward the passage R).
[0026]
Further, when adjusting the displacement of the handrail H to the use position, the procedure may be reversed. Even when the handrail H is moved to the use position, the arm-side contact surface 12 c formed on the main body portion 12 of the support arm 10 is the frame-side contact surface 24 a formed on the bulging portion 24 of the mounting frame 20. The handrail H and the support arm 10 are prevented from rotating downward around the rotation axis O.
[0027]
In this way, by disengaging the head of the male screw member 31 (shaft-shaped fixing member) of the fixing mechanism from the head fitting portions 22b and 22c of the mounting frame 20, the support arm 10 is moved to the use position and the folding position. The position of the handrail H can be adjusted with a simple operation. Therefore, even in the case of a long handrail H that is supported by a plurality of support arms 10, the position fixing operation of the support arm 10 to the mounting frame 20 can be performed by one person.
[0028]
In addition, in this embodiment, the head can be detached from the head fitting portions 22b and 22c by slightly loosening the external thread member 31, and the position adjustment of the handrail H can be performed more easily. In this case, by using the male screw member 31, the support arm 10 and the mounting frame 20 can be firmly coupled to each other without looseness by a screw. There is little fear.
[0029]
The arm-side contact surface 12c is formed in the main body portion 12 on the mounting surface F side with respect to the first shaft hole 12a (axis O) of the support arm 10, so that the arm-side contact surface 12c and the frame-side contact surface The contact surface 24a does not protrude from the first shaft hole 12a (second shaft hole 22a) toward the passage R, and a small and compact handrail folding device is obtained. Further, since the bulging portion 24 in which the frame side contact surface 24a is formed is provided so as to connect the side wall portions 22 and 23, the arm side contact surface 12c and the frame side contact surface 24a are connected to each other. The contact structure can be configured to be robust.
[0030]
By the way, the other side wall portion 23 of the mounting frame 20 is also formed with an arc-shaped groove and head fitting portion similar to the arc-shaped groove 22d and head fitting portions 22b and 22c formed in the side wall portion 22. Also good. In this case, the screw hole 12b is provided so as to penetrate the main body portion 12, and another screw member similar to the male screw member 31 is screwed into the penetrating screw hole 12b from the side wall portion 23 side. can do. Therefore, the support arm 10 is attached to the mounting frame by the male screw member 31 screwed into the screw hole 12b of the main body portion 12 from the side wall portion 22 side and another screw member screwed from the side wall portion 23 side. Positioning and fixing to 20 will result in a stronger fixing mechanism.
[0031]
Next, FIG. 7 shows a modification of the fixing mechanism shown in FIG. In FIG. 7, a lock pin 31 ′ (shaft-shaped fixing member) with a head instead of the screw member 31 of FIG. 6 penetrates the mounting frame 20 (side wall portion 22) and the support arm 10 (main body portion 22). It engages with the engagement hole 12b ′ (fixing hole). Further, head fitting portions 22b ′ and 22c ′ (only 22b ′ appear in FIG. 7) formed at both ends of the arc-shaped groove 22d (movement allowing portion) of the mounting frame 20 are the heads of the lock pin 31 ′. It has the convex part which can be fitted with the concave part formed in this. As a result, the convex portion of the head fitting portion 22b ′ prevents the arc movement in which the lock pin 31 ′ relatively moves into the arc-shaped groove 22d in the fitted state with the concave portion of the lock pin 31 ′ (see FIG. 7 (a)), in the fitted and disengaged state, the lock pin 31 'is engaged with the engagement hole 12b' of the mounting frame 20, and the arc movement in which the lock pin 31 'relatively moves into the arc-shaped groove 22d. Is allowed (FIG. 7B). In addition, you may provide a convex part in lock pin 31 ', and a recessed part in head fitting part 22b', respectively.
[0032]
Accordingly, by disengaging the head of the lock pin 31 ′ (shaft-shaped fixing member) from the head fitting portions 22 b ′ and 22 c ′ of the mounting frame 20, the support arm 10 is moved between the use position and the folding position. The position of the handrail H can be adjusted by a simple operation as in the previous embodiment. Moreover, when using lock pin 31 'as a shaft-shaped fixing member, there exists an advantage which can attach / detach quickly.
[0033]
8 to 10 show modified examples of the handrail folding device shown in FIGS. 1 to 3. In FIG. 8, the support method when the support arm is rotatably attached to the attachment frame is changed as follows. That is, the lower end portion of the main body 112 of the support arm 110 (second member) is constituted by bifurcated mounting brackets 112R and 112L, and the mounting brackets 112R and 112L are the central projecting portions 125 of the mounting frame 120 (first member). Is located on both sides.
[0034]
In this embodiment, both ends of the arc-shaped groove 112h (movement allowance portion) formed in the main body portion 112 (right bracket 112R) of the support arm 110 correspond to the use position and the folding position. The fitting portions 112f and 112g are formed, and the screw member 31 is screwed into the screw hole 125b (fixing hole) formed in the central projecting portion 125 of the mounting frame 120.
[0035]
The male screw member 31 includes a head that passes through one mounting bracket 112R of the support arm 110, is screwed into the screw hole 125b of the mounting frame 120, is reduced in a taper shape, and is connected to the shaft portion. The arc-shaped groove 112h is formed in the mounting bracket 112R of the support arm 110 so as to correspond to the rotation range of the support arm 110 between the use position and the folding position of the handrail H, and penetrates the male screw member 31. In this state, the male screw member 31 is allowed to move in a circular arc relative to the support arm 110 within the rotation range of the support arm 10. Further, the head fitting portions 112f and 112g are formed at both ends of the arc-shaped groove 112h so as to be fitted to the head corresponding to the outer shape of the head of the male screw member 31, respectively. The head fitting portions 112f and 112g prevent arc movement in which the male screw member 31 relatively moves into the arc-shaped groove 112h in the fitted state with the head of the male screw member 31, and the fitting is detached. In the state, with the male screw member 31 screwed into the screw hole 125b of the mounting frame 120, the male screw member 31 is allowed to move relative to the arcuate groove 112h.
[0036]
More specifically, the head fitting portions 112f and 112g have a tapered inner surface corresponding to the head of the male screw member 31, and the arc-shaped groove 112h formed in the support arm 110 has a tapered head. The fitting portion 112f, 112g is narrower than the large diameter portion and wider than the shaft portion of the male screw member 31, and the arc-shaped groove 112h is formed in an arc centered on the rotation axis O of the support arm 10. Are formed along.
[0037]
Also in this embodiment, the support arm 10 is folded to the use position by detaching the head of the male screw member 31 (shaft-shaped fixing member) from the head fitting portions 112f and 112g of the support arm 110. The position of the handrail H can be adjusted.
[0038]
The arm-side contact surface 112i is in contact with the frame-side contact surface 121c formed on the mounting portion 121 of the mounting frame 120 on the mounting surface F side with respect to the shaft holes 112Ra and 112La.
[0039]
Further, FIG. 11 shows another modification of the fixing mechanism of FIG. This fixing mechanism has a groove (slit) that opens to the outer surface, and a columnar (for example, columnar) or cylindrical (for example, cylindrical) fixing pin that is inserted into the groove as an axial member. Specifically, two grooves 12d and 12e formed corresponding to the use position and the folding position are opened on the outer surface of the lower end of the main body 12 of the support arm 10. On the other hand, the grooves 22e and 23e are opened on the outer surfaces of the lower end portions of the side wall portions 22 and 23 of the mounting frame 20 at substantially the same position in a side view. When the grooves 12e of the support arm 10 are aligned with the grooves 22e and 23e of the mounting frame 20 and inserted through the grooves 12e, 22e and 23e with the fixing pin 32 as shown in FIG. Is fixed at the use position. Similarly, when the fixing pin 32 is inserted through the grooves 12d, 22e, and 23e, the handrail H is fixed at the folding position. In this case, the fixing pin 32 may be inserted not through a groove (slit) opened on the outer surface, but may be an insertion hole having a circular cross section.
[0040]
Thus, when the fixing pin 32 is used for the fixing mechanism, there is an advantage that the attaching / detaching operation can be performed quickly. In addition, the combination with a groove (slit) that opens to the outer surface allows for quicker attachment / detachment work.
[0041]
In addition, in each modification of FIGS. 7-11, the same code | symbol is attached | subjected to the part which is common in FIG. 1, and detailed description is abbreviate | omitted.
[0042]
By the way, although the male screw member 31, the lock pin 31 ′, and the like have been exemplified and described as the shaft-like fixing member, for example, a wedge, a key, or the like can be used.
[0043]
Furthermore, as the fixing mechanism, in addition to the shaft-like member described so far, various known mechanisms such as a tightening mechanism using a clamp or the like, and a resilient mechanism using a resilient action such as a spring may be used.
[0044]
For example, when the present invention is applied to a long handrail, a plurality of handrail folding devices according to the present invention may be disposed along the longitudinal direction of the handrail.
[Brief description of the drawings]
FIG. 1 is a front view and a side view showing an example of a handrail folding device according to the present invention.
FIG. 2 is a cross-sectional view taken along the line AA in FIG.
FIG. 3 is a side view when the handrail is displaced to the folding position in FIG.
FIG. 4 is a front half sectional view and a side view of a support arm.
FIG. 5 is a front view and a side view of a mounting frame.
6 is a cross-sectional view taken along the line BB in FIG.
FIG. 7 is a cross-sectional view showing a modification of FIG.
FIG. 8 is a front view and a side view showing a modification of FIG.
FIG. 9 is a cross-sectional view taken along the line CC of FIG.
FIG. 10 is a side view when the handrail is displaced to the folding position in FIG.
11A and 11B are a side view and an exploded side view showing another modification of the fixing mechanism in FIG.
[Explanation of symbols]
10 Support arm (first member)
20 Mounting frame (second member)
110 Support arm (second member)
120 Mounting frame (first member)
12b, 125b Screw hole (fixing hole)
12c, 112i Arm side contact surfaces 22b, 22c, 112f, 112g Head fitting portions 22d, 112h Arc-shaped grooves (movement allowance portions)
24a, 21c Frame side contact surface 31 Male thread member (shaft-shaped fixing member)
31 'Lock pin (shaft-shaped fixing member)
H Handrail F Mounting surface R Passage O Rotation axis

Claims

A mounting frame fixed to a mounting surface such as a wall;
A support arm connected to a handrail installed along the passage, and supporting the handrail so as to be rotatable between a use position protruding toward the passage and a folding position close to the mounting surface;
A fixing mechanism for fixing the position of the support arm to the mounting frame at least in the use position;
Equipped with a,
The fixing mechanism is
A fixing hole formed in a first member which is one of the support arm and the mounting frame;
A shaft-shaped fixing member with a head that penetrates the second member, which is the other of the support arm and the mounting frame, and engages the fixing hole of the first member;
The shaft-shaped fixing member is formed in the second member so as to correspond to a rotation range of the support arm between the use position and the folding position of the handrail, and the shaft-shaped fixing member penetrates the shaft-shaped fixing member. A movement allowing portion for allowing the arc to move relative to the second member within a rotation range of the support arm;
At both end portions of the movement allowing portion, the shaft-shaped fixing member is formed so as to be fitted to the head corresponding to the outer shape of the head of the shaft-shaped fixing member. The arc-shaped movement that relatively moves into the movement-permitting portion is prevented, and in the fitted and detached state, the shaft-shaped fixing member is engaged with the fixing hole of the first member, and the shaft-shaped fixing member is moved. Including a head fitting portion that allows arc movement to move relatively into the allowable portion,
The head of the shaft-like fixing member is detached from the head fitting portion of the second member, and the supporting state is maintained while maintaining the engagement state between the shaft-like fixing member and the fixing hole of the first member. As the arm is rotated between the use position and the folding position, the shaft-shaped fixing member is relatively moved at the movement allowing portion, and the shaft-shaped fixing is performed at the use position or the folding position. The first member is fixed to the second member by fitting the head of the member to the head fitting portion of the second member, and the handrail is moved to the use position or the folding position via the support arm. A handrail folding device characterized by being fixed to a handrail.

The said support arm and the said attachment frame are each provided with the contact surface which contact | abuts at least in the said use position, and prevents that the said handrail rotates downward around the rotation axis line of the said support arm. The handrail folding device described.

The contact surface includes an arm-side contact surface formed on the support arm so as to be positioned on the mounting surface side with respect to the position of the rotation axis of the support arm at the use position, and the arm-side contact surface. The handrail folding device according to claim 2, further comprising a frame-side contact surface formed on the mounting frame so as to face the frame.

The shaft-shaped fixing member is a male screw member with a head, and includes a head connected to the shaft portion by reducing the diameter in a taper shape. On the other hand, the fixing hole formed in the first member has a male screw. The screw hole into which the member is screwed,
Further, the head fitting portion is formed to have a tapered inner surface corresponding to the head of the male screw member,
Furthermore, the movement allowing portion formed on the second member is configured by an arc-shaped groove that is narrower than the large diameter portion of the tapered head fitting portion and wider than the shaft portion of the male screw member. The arc-shaped groove is formed along an arc centered on the rotation axis of the support arm,
The supporting member while loosening the male screw member and detaching the head thereof from the head fitting portion of the second member and maintaining the screwed state between the male screw member and the screw hole of the first member. As the arm is rotated between the use position and the folding position, the male screw member is relatively moved along the arcuate groove, and the male screw is moved at the use position or the folding position. By tightening the member into the screw hole of the first member, the head of the male screw member is fitted to the head fitting portion of the second member, and the first member is fixed to the second member. The handrail folding device according to any one of claims 1 to 3, wherein the handrail is fixed to the use position or the folding position via the support arm.

In the folded position, the support arm and the mounting frame are positioned by the fixing mechanism in a state in which the position of the center of gravity of the handrail is deviated from the position of the rotation axis of the support arm toward the mounting surface. folding device of the handrail as claimed in any one of claims 1 to 4 is fixed.