JP4004338B2

JP4004338B2 - Door guard

Info

Publication number: JP4004338B2
Application number: JP2002172002A
Authority: JP
Inventors: 省次高橋
Original assignee: Ryobi Ltd
Current assignee: Ryobi Ltd
Priority date: 2002-06-12
Filing date: 2002-06-12
Publication date: 2007-11-07
Anticipated expiration: 2022-06-12
Also published as: JP2004019135A

Description

【０００１】
【発明の属する技術分野】
本発明は、ドアガードに関する。
【０００２】
【従来の技術】
実公平３−１１３３４号公報、実開平２−４７３６９号公報は、用心金具であるドアガードについて開示する。これらのドアガードは、扉に枢軸を介し起倒可能に連結されたアーム部材と、出入口枠に固定された係止部材とを備え、アーム部材には、閉扉状態でのアーム部材の起倒操作に伴い係止部材に挿脱する挿脱孔と、開扉時に係止部材上をストップ位置までスライドする上記挿脱孔に連なる案内溝とが設けられている。
【０００３】
ドアガードをガード状態にするには、閉扉状態でアーム部材を扉上で起立させ、挿脱孔内に係止部材を突出させる。この状態で扉を開けると、アーム部材の案内溝が係止部材上をストップ位置までスライドする。これにより、扉は半開き状態になり、それ以上開かない。また、半開き状態の扉を閉じると、アーム部材は逆方向にスライドし、挿脱孔内に係止部材が到達したところで停止する。そこで、アーム部材を扉の表面へと倒すと、挿脱孔から係止部材が離脱し、ドアガードが解除状態にされる。これにより、扉は開閉自在になる。
【０００４】
【発明が解決しようとする課題】
ところが、上述のごとくドアガードをガード状態にするべく閉扉状態でアーム部材を扉上で起立させ、挿脱孔内に係止部材を突出させておくと、アーム部材が扉の表面へと倒れてドアガードが解除状態に戻されてしまう場合がある。
【０００５】
また、従来のドアガードは、アーム部材が扉上で引き起こされガード状態にされると、アーム部材の案内溝が係止部材上をストップ位置までスライド可能であるから、扉の半開は許容するが、扉を閉止状態にロックするための錠として機能するようにはなっていない。
【０００６】
従って、本発明は、上記課題を解決することができるドアガードを提供することを目的とする。
【０００７】
【課題を解決するための手段】
上記問題点を解決するため、請求項１に係る発明は、扉（１）に起倒可能に連結されたアーム部材（２）と、出入口枠（３）に取り付けられた係止部材（４）とを備え、前記アーム部材には、閉扉状態でのアーム部材の起倒により係止部材が挿脱する挿脱孔（１０）と、開扉時に係止部材上をストップ位置までスライドする上記挿脱孔に連なる案内溝（１１）とが設けられたドアガードにおいて、閉扉状態でのみ係止部材を挿脱孔に対する離脱阻止位置と離脱許容位置との間で切換える切換え手段（４ａ、４ｂ、２０、２２、２８、３２、３４）が設けられ、係止部材が切換え手段により離脱許容位置から離脱阻止位置に切り換えられた状態において、前記係止部材が挿脱孔に係止されてアーム部材の起倒が阻止されるとともに、挿脱孔から案内溝への移行が許容され、係止部材が切換え手段により離脱阻止位置から離脱許容位置に切り換えられた状態において、アーム部材を起倒可能であって、挿脱孔から案内溝への移行が阻止されて前記扉の開扉を阻止することを特徴とする。
【００１０】
また、請求項２の発明は、請求項１に記載のドアガードにおいて、切換え手段（４ａ，４ｂ，２０，２２，２８，３２，３４）により切り換えられる係止部材（４）を離脱許容位置又は離脱阻止位置に拘束する位置決め手段（１３，２３，２９，３３）が設けられたドアガードを採用する。
【００１１】
【発明の実施の形態】
以下、本発明の実施の形態について添付図面を参照して詳述する。
【００１２】
＜実施の形態１＞
図１乃至図４に示すように、このドアガードは、外開き用の扉１に起倒可能に連結されたアーム部材２と、出入口枠３に取り付けられた係止部材４とを備える。
【００１３】
アーム部材２は金属材料等により形成されたＵ字形部材であり、平行に伸びる二本のレール２ａ，２ｂと、二本のレール２ａ，２ｂの一端を閉じる閉止片２ｃとを具備する。アーム部材２は、二本のレール２ａ，２ｂが上下になって水平に伸びるように扉１の内表面１ａ上に配置される。
【００１４】
一方、扉１の内表面１ａには、ブラケット５が止めネジ６により固定され、このブラケット５の上下の腕５ａ，５ｂにアーム部材２の二本のレール２ａ，２ｂの他端が夫々垂直な枢軸７を介して連結される。これにより、アーム部材２は枢軸７を支点にして水平面上で回動可能となり、扉１の内表面１ａ上において起倒可能である。
【００１５】
また、図２に示すように、ブラケット５とアーム部材２との間には、クリックストップ機構がアーム部材２の位置決めのために設けられる。クリックストップ機構はブラケット５側に埋設されたボール等からなる凸部８と、凸部８が嵌まり込むアーム部材２側に形成された複数個の凹部９ａ，９ｂとで構成される。凸部８はブラケット５内に埋設された図示しないスプリングにより常時外向きに付勢される。もちろん、凸部８と凹部９ａ，９ｂはブラケット５とアーム部材２との間で入れ替えても良い。また、凸部８は屈曲させた板バネ等で構成してもよい。このクリックストップ機構の凹凸部９ａ，９ｂ，８の係合により、アーム部材２は図２中実線で示す扉１の内表面１ａ上で起立した位置と同図中二点鎖線で示す扉１の内表面１ａ上に倒れた位置のいずれか一方に選択的に保持される。このアーム部材２が図２中実線で示す位置に起立した状態がこのドアガードがガード状態にあるときに対応し、アーム部材２が同図中二点鎖線で示す位置に倒れた状態がドアガードが非ガード状態にあるときに対応する。
【００１６】
アーム部材２には、図１乃至図４に示すように、閉扉状態でのアーム部材２の起倒により係止部材４が挿脱する挿脱孔１０と、開扉時に係止部材４上をストップ位置までスライドする上記挿脱孔１０に連なる案内溝１１とが設けられる。
【００１７】
挿脱孔１０は、アーム部材２の上記ブラケット５側に形成される。具体的にはアーム部材２の二本のレール２ａ，２ｂ間に形成される。
【００１８】
案内溝１１は、アーム部材２の上記閉止片２ｃ側に形成される。具体的には二本のレール２ａ，２ｂの間隔が挿脱孔１０の箇所よりも狭められることにより形成される。
【００１９】
係止部材４は、図１及び図２に示すように、軸部４ａと、軸部４ａの先に膨出形成される頭部４ｂとを具備する。軸部４ａは受座１６を介して出入口枠３側に支持されており、受座１６に連結される丸軸３４と、丸軸３４の先に形成される後述するロック部２１とを具備する。頭部４ｂは挿脱孔１０の開口よりも小さいので、閉扉状態においてアーム部材２を扉１の内表面１ａ上で起こし又は倒すと、係止部材４が挿脱孔１０に入り込み又は挿脱孔１０から離脱する。また、頭部４ｂは案内溝１１の幅よりも大きいので、係止部材４が案内溝１１内に入った後はアーム部材２の扉１上での倒動作は不能になる。
【００２０】
また、係止部材４は、閉扉状態において係止部材４を挿脱孔１０に対する離脱阻止位置と離脱許容位置との間で切換えるための切換え手段を備える。
【００２１】
この切換え手段は、図１乃至図４に示すように、軸部４ａの先端の丸軸が受座１６の軸穴に軸回りで回転可能に挿入され、また係止部材４の頭部４ｂの側面から突起２０を突出させることにより構成される。
【００２２】
図１乃至図５に示すように、突起２０は頭部４ｂと一体化され全体として楕円形のごとく形成される。この突起２０は、係止部材４が図１及び図２に示す離脱許容位置から図３及び図４に示す離脱阻止位置に切り換えられると挿脱孔１０に係止し、アーム部材２の倒動作を阻止する。突起２０がアーム部材２の倒動作を阻止することにより、このドアガードはガード状態を維持する。このガード状態は係止部材４が離脱許容位置に切り換えられない限り解消されない。逆に、突起２０は、係止部材４が図３及び図４に示す離脱阻止位置から図１及び図２に示す離脱許容位置に切り換えられると挿脱孔１０から離反し、アーム部材２の倒動作を許容する。この突起２０は図示例では二個設けられるが、一個だけ設けても良い。
【００２３】
係止部材４と受座１６との間には、切換え手段により切り換えられる係止部材を離脱許容位置又は離脱阻止位置に拘束する位置決め手段が設けられる。
【００２４】
図５及び図６に示すように、この位置決め手段は具体的にはクリックストップ機構であり、係止部材４の丸軸３４の先端に固定ネジ１４で固定されるストッパ板１２と、ストッパ板１２に嵌まり込む係合子であるボール１３とを有する。ストッパ板１２は円板であり、その回りには例えば９０度間隔で四つの係合孔１５が穿設される。係止部材４の丸軸３４及びストッパ板１２は受座１６の軸穴内に軸回りに回転可能に保持される。受座１６が出入口枠３に長穴１７及び止めネジ１８（図１）を介して固定されることにより、係止部材４は出入口枠３上から閉じた扉１の内表面１ａに平行に水平方向に突出する。受座１６にその軸穴を囲むように一定ピッチで穿設された丸穴内には、係合子であるボール１３と、ボール１３をストッパ板側に付勢するスプリング１９とが収納される。ボール１３及びスプリング１９は丸軸３４の回りに例えば１８０度間隔で二つ埋設される。なお、係合孔１５は受座１６側に設けスプリング１９をストッパ板１２側に配置しても良く、またボール１３、係合孔１５の個数も適宜変更可能である。
【００２５】
係止部材４をその丸軸３４回りで左右いずれかに回転させるとボール１３が係合孔１５に嵌まり込むことにより、係止部材４は図１及び図２に示す離脱許容位置に停止し、更に、係止部材４をその丸軸３４回りで同方向に９０度回転させるとボール１３が次の係合孔１５に嵌まり込むことにより、係止部材４は図３及び図４に示す離脱阻止位置に停止する。このように係止部材４を回転させることにより、係止部材４を離脱許容位置又は離脱阻止位置に選択的に切り換えることができる。
【００２６】
また、図１及び図３に示すように、係止部材４の軸部４ａにはロック部２１が設けられる。このロック部２１は、上記切換え手段により係止部材４が離脱阻止位置から離脱許容位置に切り換えられると挿脱孔１０から案内溝１１への係止部材４の移行を阻止するためのもので、係止部材４の丸軸３４と頭部４ｂとの間に形成される。
【００２７】
具体的には、係止部材４の軸部４ａの挿脱孔１０に囲まれる箇所が横断面長方形の角軸とされることによりロック部２１が形成され、このロック部２１が、図１に示すように、係止部材４が離脱許容位置に切り換えられたときに長方形の長辺が案内溝１１側に臨み、図３に示すように、係止部材４が離脱阻止位置に切り換えられたときに長方形の短辺が案内溝１１側に臨むように配置される。ロック部２１の長方形断面の長辺は案内溝１１の幅よりも長いので、ロック部２１は案内溝１１内に侵入することはできず、また、ロック部２１の長方形断面の短辺は案内溝１１の幅よりもやや短いので、ロック部２１は案内溝１１内へとスライド可能である。
【００２８】
これにより、図１及び図２に示すように閉扉状態でアーム部材２を起立させ挿脱孔１０に係止部材４を挿入しておくと、ロック部２１が挿脱孔１０内に留まって係止部材４の案内溝１１内への移動を阻止し、ドアガードが錠として扉１の開扉を阻止する。また、係止部材４を図１及び図２に示す離脱許容位置から図３及び図４に示す離脱阻止位置に切り換えた状態で扉１を開こうとすると、ロック部２１がその短辺側から案内溝１１内へと入り込むので、図７及び図８に示すように、扉１はアーム部材２の閉止片２ｃがロック部２１に当接するまで開き半開状態で停止する。
【００２９】
また、この半開状態の扉１の隙間から手を差し込んで係止部材４を回そうとしても、ロック部２１が案内溝１１内で係止部材４の軸回りに回転不能であるから、切換え手段はロックされることとなり、係止部材４の離脱阻止位置から離脱許容位置への切り換えは阻止される。
【００３０】
なお、ロック部２１は横断面長方形に限らず横断面楕円形等の他の形状に形成することも可能である。
【００３１】
次に、上記構成のドアガードの作用を説明する。
【００３２】
このドアガードをガード状態にセットするには、まず、図１及び図２に示すように、係止部材４をその軸回りに回動操作して離脱許容位置にセットする。これにより、係止部材４の楕円形の頭部４ｂは水平方向に横長になりアーム部材２の挿脱孔１０に挿通可能な状態となる。この状態でアーム部材２を図２中二点鎖線位置から実線位置へと枢軸７を支点に回して起立させ、挿脱孔１０に係止部材４を挿通させる。アーム部材２はクリックストップ機構の作用により、図２中二点鎖線位置又は実線位置に正確に停止し保持される。
【００３３】
次いで、アーム部材２が扉１上に倒れないようにするために、係止部材４をその丸軸３４の軸心回りで時計方向又は反時計方向に９０度回転させて図３及び図４に示す離脱阻止位置に切り換える。係止部材４は、クリックストップ機構の作用により離脱阻止位置に正確に停止する。これにより、頭部４ｂは扉の上下方向に縦長になり、突起２０が挿脱孔１０の縁に係止してアーム部材２の横倒しを阻止する。この状態でアーム部材２に外力が作用しても、アーム部材２は扉１の内表面１ａ上に倒れることはなく、ドアガードはガード状態に保持される。
【００３４】
また、上記のように係止部材４を離脱阻止位置に切り換えると同時に、扉１は半開き可能な状態となる。すなわち、図３及び図４に示すように、ロック部２１が水平方向に横長になって案内溝１１内へと相対的にスライド可能になる。そこで、扉１を開けるに従い係止部材４のロック部２１上を案内溝１１の縁がスライドし、図７及び図８に示すように、アーム部材２のストップ位置となる閉止片２ｃがロック部２１に当接する。これにより、扉１は半開状態となってストップし、それ以上は開かない。この扉１の半開状態において、扉１の隙間から手を差し込み係止部材４を回動操作しようとしても、ロック部２１が案内溝１１内で回動し得ないので、切換え手段がロック状態となり、係止部材４の離脱許容位置への切換えが防止される。
【００３５】
また、例えば就寝時においては、このドアガードを錠として機能させるべく係止部材４を図３及び図４に示す離脱阻止位置から図１及び図２に示す離脱許容位置へと回転させる。これにより、図１のごとく係止部材４のロック部２１が垂直方向に縦長になって案内溝１１内に入らなくなり、係止部材４は挿脱孔１０から案内溝１１への移行を阻止される。これにより、扉１に設けられた図示しないメインの錠に加え、このドアガードが補助錠として扉１の施錠効果を高めることとなる。
【００３６】
＜実施の形態２＞
図９乃至図１２に示すように、この実施の形態２におけるドアガードでは、実施の形態１の場合と異なる構成の係止部材及び切換え手段が採用される。
【００３７】
すなわち、実施の形態１では係止部材４をその軸回りで回転させることにより離脱阻止位置と離脱許容位置との間での切換えを行うようになっているが、この実施の形態２では係止部材４をその軸方向にスライドさせることにより離脱阻止位置又は離脱許容位置に切換えるようになっている。
【００３８】
図９に示すように、係止部材４の軸部４ａは案内溝１１に嵌まり込みうる横断面円形の丸軸として形成される。また、頭部４ｂは案内溝１１の幅より大径の円柱片として形成され、この頭部４ｂの一部が実施の形態１における突起２０として機能する。軸部４ａは丸軸に限らず横断面矩形の角軸等他の形状としてもよく、頭部４ｂは円柱片に限らず角柱片等他の形状としてもよい。
【００３９】
図１１に示すように、係止部材４の軸部４ａは受座１６に形成されたスライド孔２２内にスライド自在に挿入される。スライド孔２２は閉状態の扉１の内表面１ａに平行に水平方向に伸びる。このスライド孔２２と係止部材４の軸部４ａとの間に位置決め手段としてクリックストップ機構が介装される。クリックストップ機構は、スライド孔２２のスライド壁面下に埋設された凸部であるボール２３と、ボール２３をスライド孔２２のスライド壁面上へと付勢するスプリング２４と、軸部４ａの側面に軸方向に沿うように形成された二つの凹部２５ａ，２５ｂとを具備する。二つの凹部２５ａ，２５ｂは係止部材４の離脱阻止位置と離脱許容位置に夫々対応する。スライド孔２２内には、係止部材４をスライド孔２２外へと付勢するスプリング２６が必要に応じて挿入される。
【００４０】
図１０及び図１１に示すように、係止部材４を二点鎖線で示す離脱許容位置からスライド孔２２の外方向にスライドさせて実線で示す離脱阻止位置に切り換えると、アーム部材２を実線で示す起立位置から二点鎖線で示す倒位置へと回転させようとしても挿脱孔１０に係止部材４の頭部４ｂが突起となって当接し、アーム部材２の倒動作を阻止する。また、図１０に示すように閉扉状態でアーム部材２を起立させ挿脱孔１０に係止部材４を挿入し、頭部４ｂを離脱阻止位置から離脱許容位置に切り換えた状態（二点鎖線で示す状態）にしておくと、頭部４ｂが挿脱孔１０内に留まって係止部材４の案内溝１１内への移動を阻止し、ドアガードが錠として扉１の開扉を阻止する。
【００４１】
次に、上記構成のドアガードの作用を説明する。
【００４２】
このドアガードをガード状態にするには、まず、図１０に示すように、係止部材４を実線位置から二点鎖線位置へとスライド孔２２内に押し込んで離脱許容位置に切り換える。係止部材４はクリックストップ機構の作用で離脱阻止位置から離脱許容位置へと正確に移動する。これにより、係止部材４の頭部４ｂはアーム部材２の挿脱孔１０に挿通可能な状態となる。この状態でアーム部材２を図１０中二点鎖線で示す倒位置から実線で示す起立位置へと枢軸７を支点に回転させ、挿脱孔１０に係止部材４を挿通させる。アーム部材２はクリックストップ機構の作用により、図１０中二点鎖線位置又は実線位置に正確に停止し保持される。
【００４３】
次いで、係止部材４を二点鎖線位置から実線位置へと引き出して離脱阻止位置に切り換える。係止部材４は、クリックストップ機構の作用により離脱阻止位置に正確に停止する。これにより、頭部４ｂが挿脱孔１０の縁の枢軸７を支点にした円弧１０ａ上に突出してアーム部材２の横倒しを阻止する。この状態でアーム部材２に外力が作用しても、アーム部材２は扉１の内表面１ａ側に倒れることはなく、ドアガードはガード状態に保持される。
【００４４】
また、上記のように係止部材４を離脱阻止位置に切り換えると同時に、扉１は半開き可能な状態となり、軸部４ａは案内溝１１内へとスライド可能になる。そこで、扉１を開けるに従い係止部材４の軸部４ａ上を案内溝１１の縁がスライドし、図１２に示すように、アーム部材２のストップ位置となる閉止片２ｃが軸部４ａに当接する。これにより、扉１は半開状態となってストップし、それ以上は開かない。この扉１の半開状態において、扉１の隙間から手を差し込み係止部材４をその軸方向にスライド操作しようとしても、頭部４ｂが案内溝１１の縁に引っ掛かりこのスライドを阻むので、係止部材４の離脱許容位置への切換えは防止される。
【００４５】
また、例えば就寝時においては、このドアガードを錠として機能させることができ、その場合は係止部材４を図１０中実線で示す離脱阻止位置から二点鎖線で示す離脱許容位置へと押し込んでおく。これにより、係止部材４の頭部４ｂが案内溝１１内に入らないので、係止部材４は挿脱孔１０から案内溝１１への移行を阻止される。従って、扉１に設けられた図示しないメインの錠に加え、このドアガードが補助錠として扉１の施錠効果を高めることとなる。
【００４６】
なお、この実施の形態２において実施の形態１と同じ部品には同じ符号を付して示すこととし、その詳細な説明は省略する。
【００４７】
＜実施の形態３＞
図１３乃至図１６に示すように、この実施の形態３におけるドアガードでは、実施の形態１又は実施の形態２と異なる構成の係止部材及び切換え手段が採用される。
【００４８】
すなわち、実施の形態１では係止部材４をその軸心回りで回転させることにより、また実施の形態２では係止部材４をその軸方向にスライドさせることにより、離脱阻止位置と離脱許容位置との間での切換えを行うようになっているが、この実施の形態３では係止部材４をその軸部４ａの軸方向に垂直な方向にスライドさせることにより離脱阻止位置又は離脱許容位置に切換えるようになっている。
【００４９】
図１３に示すように、係止部材４の軸部４ａは案内溝１１に嵌まり込みうる横断面円形の丸軸として形成される。また、頭部４ｂは案内溝１１の幅より大径の円柱片として形成され、この頭部４ｂの一部が実施の形態１における突起２０として機能する。軸部４ａは丸軸に限らず横断面矩形の角軸等他の形状としてもよく、頭部４ｂは円柱片に限らず角柱片等他の形状としてもよい。
【００５０】
図１３乃至図１６に示すように、受座１６には出入口枠３の上下方向に沿って垂直方向に伸びるスライド溝２７が形成され、このスライド溝２７にスライダ２８が嵌め込まれ、このスライダ２８に係止部材４の軸部４ａが固定される。係止部材４の軸部４ａは閉状態の扉１の内表面１ａに平行に水平方向に突出する。スライダ２８と受座１６との間には係止部材４の位置決め手段としてクリックストップ機構が介装される。クリックストップ機構は、受座１６のスライド溝２７のスライド壁面下に埋設された凸部であるボール２９と、ボール２９をスライダ２８へと付勢するスプリング３０と、スライダ２８の側面に垂直方向に沿うように形成された二つの凹部３１ａ，３１ｂとを具備する。二つの凹部３１ａ，３１ｂは係止部材４の離脱阻止位置と離脱許容位置に夫々対応する。
【００５１】
スライダ２８をスライド溝２７内でスライドさせて係止部材４を図１３に示す離脱許容位置から図１４に示す離脱阻止位置に切り換えると、アーム部材２を起位置から倒位置へと回転させようとしても挿脱孔１０の縁に係止部材４の頭部４ｂが突起となって当接し、アーム部材２の倒動作を阻止する。また、図１３に示すように閉扉状態でアーム部材２を起立させ挿脱孔１０に係止部材４を挿入し、係止部材４を離脱阻止位置から離脱許容位置に切り換えた状態にしておくと、軸部４ａが挿脱孔１０内において案内溝１１の入り口からずれるので、係止部材４の案内溝１１内への移動を阻止し、ドアガードが錠として扉１の開扉を阻止する。
【００５２】
次に、上記構成のドアガードの作用を説明する。
【００５３】
このドアガードをガード状態にセットするには、まず、スライダ２８をスライダ溝２７内でスライドさせて、係止部材４を図１４に示す離脱阻止位置から図１３に示す離脱許容位置に移動させる。係止部材４はクリックストップ機構の作用で離脱阻止位置から離脱許容位置へと正確に移動する。これにより、係止部材４の頭部４ｂはアーム部材２の挿脱孔１０に挿通可能な状態となる。この状態でアーム部材２を倒位置から起立位置へと枢軸７を支点に回転させ、挿脱孔１０に係止部材４を挿通させる。
【００５４】
次いで、スライダ２８をスライダ溝２７内で逆向きにスライドさせて、係止部材４を図１３に示す離脱許容位置から図１４に示す離脱阻止位置へと切り換える。係止部材４は、クリックストップ機構の作用により離脱阻止位置に正確に停止する。これにより、頭部４ｂが挿脱孔１０の縁に係止してアーム部材２の横倒しを阻止する。この状態でアーム部材２に外力が作用しても、アーム部材２は扉１の内表面１ａ上に倒れることはなく、ドアガードはガード状態に保持される。
【００５５】
また、上記のように係止部材４を離脱阻止位置に切り換えると同時に、扉１は半開き可能な状態となり、軸部４ａは案内溝１０内へとスライド可能になる。そこで、扉１を開けるに従い係止部材４の軸部４ａ上を案内溝１１の縁がスライドし、図１５及び図１６に示すように、アーム部材２のストップ位置に対応する閉止片２ｃが軸部４ａに当接する。これにより、扉１は半開状態となってストップし、それ以上は開かない。この扉１の半開状態において、扉１の隙間から手を差し込み係止部材４をスライダ溝２７上でスライド操作しようとしても、軸部４ａは案内溝１１に直交する方向には移動し得ないので、係止部材４の離脱許容位置への切換えは防止される。
【００５６】
また、例えば就寝時においては、このドアガードを錠として機能させることができ、その場合は係止部材４を図１４で示す離脱阻止位置から図１３に示す離脱許容位置へと切り換えておく。これにより、係止部材４の軸部４ａが案内溝１１内に入らないので、係止部材４は挿脱孔１０から案内溝１１への移行を阻止される。従って、扉１に設けられた図示しないメインの錠に加え、このドアガードが補助錠として扉１の施錠効果を高めることとなる。
【００５７】
なお、この実施の形態３において実施の形態１又は実施の形態２と同じ部品には同じ符号を付して示すこととし、その詳細な説明は省略する。
【００５８】
＜実施の形態４＞
図１７に示すように、この実施の形態４におけるドアガードでは、実施の形態２の場合と異なる構成の係止部材及び切換え手段が採用される。
【００５９】
すなわち、実施の形態２では係止部材４をその軸方向にスライドさせることにより離脱阻止位置又は離脱許容位置に切換えるようになっているが、この実施の形態４では係止部材４を水平面上で回転させることにより離脱阻止位置又は離脱許容位置に切換えるようになっている。
【００６０】
図１７に示すように、係止部材４の軸部４ａは垂直方向に伸びる支軸３２により受座１６に軸支される。支軸３２の回りの軸部４ａと受座１６との間には位置決め手段としてのクリックストップ機構が介装される。クリックストップ機構は、受座１６内に埋設された凸部であるボール３３と、ボール３３を軸部４ａへと付勢する図示しないスプリングと、軸部４ａの支軸３２の回りに形成された図示しない二つの凹部とを具備する。二つの凹部は係止部材の離脱阻止位置と離脱許容位置に夫々対応する。
【００６１】
図１７に示すように、係止部材４を支軸３２を支点に回転させて二点鎖線で示す離脱許容位置から実線で示す離脱阻止位置へと切り換えると、アーム部材２を実線で示す起立位置から二点鎖線で示す倒位置へと回転させようとしても挿脱孔１０の縁の枢軸７を支点にした円弧１０ａ上に係止部材４の頭部４ｂが突起となって介入し、アーム部材２の倒動作を阻止する。また、係止部材４を図１７の二点鎖線で示す位置以上に回転可能とし、頭部４ｂがアーム部材４の案内溝１１の入り口に臨むようにすれば、閉扉状態でアーム部材２を起立させ挿脱孔１０に係止部材４を挿入し、係止部材４を離脱阻止位置から離脱許容位置に切り換えた状態にしておくと、頭部４ｂが挿脱孔１０内において案内溝１１の入り口に臨むことになるので、係止部材４の案内溝１１内への移動を阻止し、ドアガードが錠として扉１の開扉を阻止することができる。
【００６２】
なお、係止部材４の全体を傾斜させる構成に代えて、係止部材４の頭部４ｂの断面形状を楕円或いは長方形とし、この頭部４ｂを軸部４ａ上で所定の角度だけ回転可能として、頭部４ｂを傾斜させることにより、アーム部材２の挿脱孔１０の軌道に対して頭部４ｂを出没させるようにしてもよい。
【００６３】
次に、上記構成のドアガードの作用を説明する。
【００６４】
このドアガードをガード状態にするには、まず、係止部材４を実線位置から二点鎖線位置へと支軸３２を支点に回転させて離脱許容位置に切り換える。係止部材４はクリックストップ機構の作用で離脱阻止位置から離脱許容位置へと正確に移動する。これにより、係止部材４の頭部４ｂはアーム部材２の挿脱孔１０に挿通可能な状態となる。この状態でアーム部材２を二点鎖線で示す倒位置から実線で示す起立位置へと枢軸７を支点に回転させ、挿脱孔１０に係止部材４を挿通させる。アーム部材２はクリックストップ機構の作用により、二点鎖線位置又は実線位置に正確に停止し保持される。
【００６５】
次いで、係止部材４を二点鎖線位置から実線位置へと回転傾斜させて離脱阻止位置に切り換える。係止部材４は、クリックストップ機構の作用により離脱阻止位置に正確に停止する。これにより、頭部４ｂが挿脱孔１０の縁の支軸３２を支点にした円弧１０ａ上に突出してアーム部材２に干渉しアーム部材２の横倒しを阻止する。この状態でアーム部材２に外力が作用しても、アーム部材２は扉１の内表面１ａ上に倒れることはなく、ドアガードはガード状態に保持される。
【００６６】
また、上記のように係止部材４を離脱阻止位置に切り換えると同時に、扉１は半開き可能な状態となり、軸部４ａは案内溝１１内へとスライド可能になる。そこで、扉１を開けるに従い係止部材４の軸部４ａ上を案内溝１１の縁がスライドし、アーム部材２のストップ位置に対応する閉止片２ｃが軸部４ａに当接する。これにより、扉１は半開状態となってストップし、それ以上は開かない。この扉１の半開状態において、扉１の隙間から手を差し込み係止部材４を回動操作しようとしても、頭部４ｂがこの回動を阻むので、係止部材４の離脱許容位置への切換えは防止される。
【００６７】
また、例えば就寝時においては、このドアガードを錠として機能させることができ、その場合は係止部材４を図１７中実線で示す離脱阻止位置から同図中二点鎖線で示す離脱許容位置を超える位置へと回動させておく。これにより、係止部材４の頭部４ｂが案内溝１１に臨むので、係止部材４は挿脱孔１０から案内溝１１への移行を阻止される。従って、扉１に設けられた図示しないメインの錠に加え、このドアガードが補助錠として扉１の施錠効果を高めることとなる。
【００６８】
なお、この実施の形態４において実施の形態１又は実施の形態２と同じ部品には同じ符号を付して示すこととし、その詳細な説明は省略する。
【００６９】
【発明の効果】
請求項１の発明によれば、不注意、不審者等によるドアガードのガード状態の解除を確実に防止することができ、防犯効果をより一層高めることができる。また、ドアガードが錠として扉の開閉を阻止することとなり、例えば扉のメイン錠の補助錠として、また、就寝時に扉の施錠を忘れた時の補助錠として使用することで防犯効果をより一層高めることができる。
【００７２】
請求項２の発明によれば、請求項１に記載のドアガードにおいて、切換え手段により切り換えられる係止部材を離脱許容位置又は離脱阻止位置に拘束する位置決め手段が設けられたドアガードであるから、係止部材を離脱許容位置又は離脱阻止位置に正確に切り換えることができ、また、切り換え後の位置に係止部材をしっかりと保持し振動、衝撃等による切り換わりを防止することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態１に係るドアガードを係止部材が離脱許容位置に切り換えられた状態で示す正面図である。
【図２】図１中、ＩＩ−ＩＩ線矢視断面図である。
【図３】図１に示すドアガードを係止部材が離脱阻止位置に切り換えられた状態で示す正面図である。
【図４】図３中、ＩＶ−ＩＶ線矢視断面図である。
【図５】図１に示す係止部材の切換え装置を示す部分切欠側面図である。
【図６】図５に示す係止部材の切換え装置の背面図である。
【図７】図３に示すドアガードを扉が半開した状態で示す部分正面図である。
【図８】図７中、ＶＩＩＩ−ＶＩＩＩ線矢視図である。
【図９】本発明の実施の形態２に係るドアガードを係止部材が離脱阻止位置に切り換えられた状態で示す正面図である。
【図１０】図９中、Ｘ−Ｘ線矢視断面図である。
【図１１】図１０に示す係止部材の切換え手段を示す拡大図である。
【図１２】図１０に示すドアガードを扉が半開した状態で示す平面図である。
【図１３】本発明の実施の形態３に係るドアガードを係止部材が離脱許容位置に切り換えられた状態で示す正面図である。
【図１４】図１３に示すドアガードを係止部材が離脱阻止位置に切り換えられた状態で示す正面図である。
【図１５】図１４に示すドアガードを扉が半開した状態で示す正面図である。
【図１６】図１５中、ＸＶＩ−ＸＶＩ線矢視断面図である。
【図１７】本発明の実施の形態４に係るドアガードを示す水平断面図である。
【符号の説明】
１…扉
２…アーム部材
３…出入口枠
４…係止部材
４ａ…軸部
１０…挿脱孔
１１…案内溝
１３…ボール
２０…突起
２１…ロック部
２２…スライド孔
２３…ボール
２８…スライダ
２９…ボール
３２…支軸
３４…丸軸[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a door guard.
[0002]
[Prior art]
Japanese Utility Model Publication Nos. 3-11334 and 2-47369 disclose door guards that are precautionary fittings. These door guards include an arm member connected to the door via a pivot so as to be able to be tilted and a locking member fixed to the entrance / exit frame, and the arm member can be used for a tilting operation of the arm member in a closed state. Along with this, an insertion / removal hole for inserting / removing into / from the locking member and a guide groove connected to the insertion / removal hole that slides on the locking member to the stop position when the door is opened are provided.
[0003]
To bring the door guard into the guard state, the arm member is raised on the door in the closed state, and the locking member is projected into the insertion / removal hole. When the door is opened in this state, the guide groove of the arm member slides on the locking member to the stop position. Thereby, a door will be in a half-open state, and will not open any more. When the half-open door is closed, the arm member slides in the reverse direction and stops when the locking member reaches the insertion / removal hole. Therefore, when the arm member is tilted to the surface of the door, the locking member is released from the insertion / removal hole, and the door guard is released. As a result, the door can be freely opened and closed.
[0004]
[Problems to be solved by the invention]
However, as described above, if the arm member is raised on the door in the closed state so that the door guard is in the guard state, and the locking member is protruded in the insertion / removal hole, the arm member falls to the door surface and the door guard May be returned to the released state.
[0005]
In addition, the conventional door guard allows the half-opening of the door because the guide groove of the arm member is slidable to the stop position on the locking member when the arm member is raised and guarded on the door, It does not function as a lock to lock the door closed.
[0006]
Therefore, an object of this invention is to provide the door guard which can solve the said subject.
[0007]
[Means for Solving the Problems]
  In order to solve the above-described problems, the invention according to claim 1 includes an arm member (2) connected to the door (1) so as to be able to rise and fall, and a locking member (4) attached to the entrance / exit frame (3). The arm member includes an insertion / removal hole (10) through which the locking member is inserted / removed when the arm member is raised and lowered in the closed state, and the above-described insertion that slides on the locking member to the stop position when the door is opened. In the door guard provided with the guide groove (11) connected to the hole, in the closed stateonlySwitching means (4a, 4b, 20, 22, 28, 32, 34) is provided for switching the locking member between the separation preventing position and the separation allowing position with respect to the insertion / removal hole.In a state where the locking member is switched from the separation allowing position to the separation preventing position by the switching means, the locking member is locked to the insertion / removal hole to prevent the arm member from being tilted and from the insertion / removal hole. In the state where the transition to the guide groove is allowed and the locking member is switched from the separation preventing position to the separation allowing position by the switching means, the arm member can be raised and lowered, and the transition from the insertion / removal hole to the guide groove is performed. It is blocked to prevent the door from opening.
[0010]
  Claims2In the door guard according to claim 1, the locking member (4) switched by the switching means (4a, 4b, 20, 22, 28, 32, 34) in the door guard according to claim 1 is constrained to the separation allowable position or the separation prevention position. A door guard provided with positioning means (13, 23, 29, 33) is employed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0012]
<Embodiment 1>
As shown in FIGS. 1 to 4, the door guard includes an arm member 2 connected to the door 1 for opening outward so that the door guard can be raised and lowered, and a locking member 4 attached to the entrance / exit frame 3.
[0013]
The arm member 2 is a U-shaped member made of a metal material or the like, and includes two rails 2a and 2b extending in parallel and a closing piece 2c that closes one end of the two rails 2a and 2b. The arm member 2 is disposed on the inner surface 1a of the door 1 so that the two rails 2a and 2b extend vertically and extend horizontally.
[0014]
On the other hand, the bracket 5 is fixed to the inner surface 1a of the door 1 by a set screw 6, and the other ends of the two rails 2a and 2b of the arm member 2 are perpendicular to the upper and lower arms 5a and 5b of the bracket 5, respectively. It is connected via a pivot 7. As a result, the arm member 2 can be rotated on a horizontal plane with the pivot 7 as a fulcrum, and can be raised and lowered on the inner surface 1 a of the door 1.
[0015]
As shown in FIG. 2, a click stop mechanism is provided between the bracket 5 and the arm member 2 for positioning the arm member 2. The click stop mechanism includes a convex portion 8 made of a ball or the like embedded on the bracket 5 side, and a plurality of concave portions 9a and 9b formed on the arm member 2 side into which the convex portion 8 is fitted. The convex portion 8 is always urged outward by a spring (not shown) embedded in the bracket 5. Of course, the convex portion 8 and the concave portions 9 a and 9 b may be interchanged between the bracket 5 and the arm member 2. Further, the convex portion 8 may be constituted by a bent leaf spring or the like. Due to the engagement of the uneven portions 9a, 9b, and 8 of the click stop mechanism, the arm member 2 is positioned on the inner surface 1a of the door 1 indicated by a solid line in FIG. 2 and the position of the door 1 indicated by a two-dot chain line in FIG. It is selectively held at either one of the positions that have fallen on the inner surface 1a. The state in which the arm member 2 stands at the position indicated by the solid line in FIG. 2 corresponds to the door guard being in the guard state, and the state in which the arm member 2 is tilted to the position indicated by the two-dot chain line in FIG. Corresponds to the guard state.
[0016]
As shown in FIGS. 1 to 4, the arm member 2 includes an insertion / removal hole 10 through which the locking member 4 is inserted / removed when the arm member 2 is raised and lowered in the closed state, and an upper portion of the locking member 4 when the door is opened. A guide groove 11 connected to the insertion / removal hole 10 that slides to the stop position is provided.
[0017]
The insertion / removal hole 10 is formed on the bracket 5 side of the arm member 2. Specifically, it is formed between the two rails 2 a and 2 b of the arm member 2.
[0018]
The guide groove 11 is formed on the closing piece 2 c side of the arm member 2. Specifically, the distance between the two rails 2 a and 2 b is formed by being narrower than that of the insertion / removal hole 10.
[0019]
As shown in FIGS. 1 and 2, the locking member 4 includes a shaft portion 4 a and a head portion 4 b that bulges at the tip of the shaft portion 4 a. The shaft portion 4 a is supported on the entrance / exit frame 3 side via the receiving seat 16, and includes a round shaft 34 connected to the receiving seat 16 and a lock portion 21 described later formed at the tip of the round shaft 34. . Since the head 4b is smaller than the opening of the insertion / removal hole 10, when the arm member 2 is raised or defeated on the inner surface 1a of the door 1 in the closed state, the locking member 4 enters the insertion / removal hole 10 or is inserted / removed. Leave 10 Further, since the head 4b is larger than the width of the guide groove 11, after the locking member 4 enters the guide groove 11, the arm member 2 cannot be tilted on the door 1.
[0020]
Further, the locking member 4 includes switching means for switching the locking member 4 between a separation preventing position and a separation allowable position with respect to the insertion / removal hole 10 in the closed state.
[0021]
As shown in FIGS. 1 to 4, the switching means is configured such that the round shaft at the tip of the shaft portion 4 a is inserted into the shaft hole of the seat 16 so as to be rotatable around the shaft, and the head 4 b of the locking member 4 is It is configured by protruding the protrusion 20 from the side surface.
[0022]
As shown in FIGS. 1 to 5, the protrusion 20 is integrated with the head 4 b and formed as an oval as a whole. The protrusion 20 is locked in the insertion / removal hole 10 when the locking member 4 is switched from the detachable allowable position shown in FIGS. 1 and 2 to the detachment preventing position shown in FIGS. 3 and 4, and the arm member 2 is tilted. To prevent. When the protrusion 20 prevents the arm member 2 from falling, the door guard maintains the guard state. This guard state is not canceled unless the locking member 4 is switched to the disengagement allowable position. On the contrary, the protrusion 20 is separated from the insertion / removal hole 10 when the locking member 4 is switched from the separation preventing position shown in FIGS. 3 and 4 to the separation allowing position shown in FIGS. Allow movement. Two protrusions 20 are provided in the illustrated example, but only one may be provided.
[0023]
Positioning means is provided between the locking member 4 and the receiving seat 16 to constrain the locking member switched by the switching means to the release allowing position or the release preventing position.
[0024]
As shown in FIGS. 5 and 6, this positioning means is specifically a click stop mechanism, a stopper plate 12 fixed to the tip of the round shaft 34 of the locking member 4 with a fixing screw 14, and the stopper plate 12. And a ball 13 which is an engaging member fitted into the. The stopper plate 12 is a disc, and four engagement holes 15 are formed around the stopper plate 12 at intervals of 90 degrees, for example. The round shaft 34 and the stopper plate 12 of the locking member 4 are held in the shaft hole of the seat 16 so as to be rotatable about the axis. Since the receiving seat 16 is fixed to the entrance / exit frame 3 via a long hole 17 and a set screw 18 (FIG. 1), the locking member 4 is horizontally parallel to the inner surface 1a of the door 1 closed from above the entrance / exit frame 3. Protrude in the direction. A ball 13 that is an engaging element and a spring 19 that urges the ball 13 toward the stopper plate are housed in a round hole that is formed at a constant pitch so as to surround the shaft hole in the seat 16. Two balls 13 and springs 19 are embedded around the round shaft 34, for example, at intervals of 180 degrees. The engagement hole 15 may be provided on the receiving seat 16 side, and the spring 19 may be disposed on the stopper plate 12 side, and the number of balls 13 and the engagement holes 15 can be changed as appropriate.
[0025]
When the locking member 4 is rotated to the left or right around the round shaft 34, the ball 13 is fitted into the engagement hole 15, so that the locking member 4 stops at the disengagement allowable position shown in FIGS. 1 and 2. Further, when the locking member 4 is rotated 90 degrees around the round shaft 34 in the same direction, the ball 13 is fitted into the next engagement hole 15, whereby the locking member 4 is shown in FIGS. 3 and 4. Stop at the separation prevention position. By rotating the locking member 4 in this manner, the locking member 4 can be selectively switched to the separation allowing position or the separation preventing position.
[0026]
Further, as shown in FIGS. 1 and 3, a lock portion 21 is provided on the shaft portion 4 a of the locking member 4. The lock portion 21 is for preventing the locking member 4 from being moved from the insertion / removal hole 10 to the guide groove 11 when the locking member 4 is switched from the separation preventing position to the separation allowing position by the switching means. It is formed between the round shaft 34 of the locking member 4 and the head 4b.
[0027]
Specifically, a portion surrounded by the insertion / removal hole 10 of the shaft portion 4a of the locking member 4 is a rectangular shaft having a rectangular cross section, and a lock portion 21 is formed. As shown in FIG. 3, when the locking member 4 is switched to the release allowing position, the long side of the rectangle faces the guide groove 11 side, and as shown in FIG. 3, the locking member 4 is switched to the release preventing position. The rectangular short side is arranged so as to face the guide groove 11 side. Since the long side of the rectangular cross section of the lock portion 21 is longer than the width of the guide groove 11, the lock portion 21 cannot enter the guide groove 11, and the short side of the rectangular cross section of the lock portion 21 is the guide groove. Since the width is slightly shorter than the width of 11, the lock portion 21 can slide into the guide groove 11.
[0028]
As a result, as shown in FIGS. 1 and 2, when the arm member 2 is erected in the closed state and the locking member 4 is inserted into the insertion / removal hole 10, the lock portion 21 remains in the insertion / removal hole 10. The stop member 4 is prevented from moving into the guide groove 11, and the door guard prevents the door 1 from opening as a lock. Further, when the door 1 is opened in a state in which the locking member 4 is switched from the disengagement allowable position shown in FIGS. 1 and 2 to the disengagement prevention position shown in FIG. 3 and FIG. Since it enters into the guide groove 11, as shown in FIGS. 7 and 8, the door 1 is opened and stopped in a half-open state until the closing piece 2 c of the arm member 2 contacts the lock portion 21.
[0029]
Further, even if a hand is inserted through the gap of the half-opened door 1 and the locking member 4 is to be rotated, the locking portion 21 cannot be rotated around the axis of the locking member 4 in the guide groove 11. Is locked, and switching of the locking member 4 from the separation preventing position to the separation allowing position is prevented.
[0030]
The lock portion 21 is not limited to a rectangular cross section, and may be formed in other shapes such as an elliptical cross section.
[0031]
Next, the operation of the door guard configured as described above will be described.
[0032]
In order to set the door guard in the guard state, first, as shown in FIGS. 1 and 2, the locking member 4 is rotated around its axis to be set at the disengageable position. As a result, the elliptical head 4b of the locking member 4 is horizontally long and can be inserted into the insertion / removal hole 10 of the arm member 2. In this state, the arm member 2 is raised from the position indicated by the two-dot chain line in FIG. The arm member 2 is accurately stopped and held at the two-dot chain line position or the solid line position in FIG. 2 by the action of the click stop mechanism.
[0033]
Next, in order to prevent the arm member 2 from falling on the door 1, the locking member 4 is rotated 90 degrees clockwise or counterclockwise around the axis of the round shaft 34, as shown in FIGS. 3 and 4. Switch to the indicated separation prevention position. The locking member 4 accurately stops at the separation preventing position by the action of the click stop mechanism. As a result, the head 4b becomes vertically long in the vertical direction of the door, and the protrusion 20 is locked to the edge of the insertion / removal hole 10 to prevent the arm member 2 from being overturned. Even if an external force acts on the arm member 2 in this state, the arm member 2 does not fall on the inner surface 1a of the door 1, and the door guard is held in a guarded state.
[0034]
Further, as described above, the door 1 is in a state where it can be opened halfway at the same time as the locking member 4 is switched to the separation preventing position. That is, as shown in FIGS. 3 and 4, the lock portion 21 is horizontally long and can slide relatively into the guide groove 11. Therefore, as the door 1 is opened, the edge of the guide groove 11 slides on the lock portion 21 of the locking member 4, and as shown in FIGS. 7 and 8, the closing piece 2 c serving as the stop position of the arm member 2 is the lock portion. 21 abuts. Thereby, the door 1 will be in a half-open state, will stop, and will not open any more. When the door 1 is in the half-opened state, even if a hand is inserted through the gap of the door 1 and the locking member 4 is to be rotated, the lock portion 21 cannot be rotated in the guide groove 11, so that the switching means is locked. The switching of the locking member 4 to the disengagement allowable position is prevented.
[0035]
For example, when sleeping, the locking member 4 is rotated from the separation preventing position shown in FIGS. 3 and 4 to the separation allowing position shown in FIGS. 1 and 2 so that the door guard functions as a lock. As a result, as shown in FIG. 1, the locking portion 21 of the locking member 4 is vertically long and does not enter the guide groove 11, and the locking member 4 is prevented from shifting from the insertion / removal hole 10 to the guide groove 11. The Thereby, in addition to the main lock | rock which is not shown in figure provided in the door 1, this door guard will raise the locking effect of the door 1 as an auxiliary lock.
[0036]
<Embodiment 2>
As shown in FIGS. 9 to 12, the door guard according to the second embodiment employs a locking member and a switching means having a configuration different from that of the first embodiment.
[0037]
In other words, in the first embodiment, the locking member 4 is rotated around its axis to switch between the separation preventing position and the separation allowing position. By sliding the member 4 in the axial direction, the member 4 is switched to the separation preventing position or the separation allowing position.
[0038]
As shown in FIG. 9, the shaft portion 4 a of the locking member 4 is formed as a round shaft having a circular cross section that can be fitted into the guide groove 11. The head 4b is formed as a cylindrical piece having a diameter larger than the width of the guide groove 11, and a part of the head 4b functions as the protrusion 20 in the first embodiment. The shaft portion 4a is not limited to a round shaft, and may have other shapes such as a rectangular shaft with a rectangular cross section. The head 4b is not limited to a cylindrical piece, and may have other shapes such as a prismatic piece.
[0039]
As shown in FIG. 11, the shaft portion 4 a of the locking member 4 is slidably inserted into a slide hole 22 formed in the receiving seat 16. The slide hole 22 extends in the horizontal direction parallel to the inner surface 1a of the door 1 in the closed state. A click stop mechanism is interposed between the slide hole 22 and the shaft portion 4a of the locking member 4 as positioning means. The click stop mechanism includes a ball 23 that is a convex portion embedded under the slide wall surface of the slide hole 22, a spring 24 that biases the ball 23 onto the slide wall surface of the slide hole 22, and a shaft on the side surface of the shaft portion 4 a. And two recesses 25a and 25b formed along the direction. The two concave portions 25a and 25b correspond to a separation preventing position and a separation allowing position of the locking member 4, respectively. A spring 26 that urges the locking member 4 out of the slide hole 22 is inserted into the slide hole 22 as necessary.
[0040]
As shown in FIGS. 10 and 11, when the locking member 4 is slid outwardly from the slide hole 22 from the disengagement-permitted position indicated by the two-dot chain line and switched to the disengagement prevention position indicated by the solid line, the arm member 2 is indicated by the solid line. Even if it is rotated from the standing position shown to the inverted position shown by the two-dot chain line, the head 4b of the locking member 4 comes into contact with the insertion / removal hole 10 as a projection, and the arm member 2 is prevented from falling. Further, as shown in FIG. 10, the arm member 2 is erected in the closed state, the locking member 4 is inserted into the insertion / removal hole 10, and the head 4b is switched from the separation preventing position to the separation allowing position (indicated by a two-dot chain line). In the state shown in the figure, the head 4b stays in the insertion / removal hole 10 to prevent the locking member 4 from moving into the guide groove 11, and the door guard serves as a lock to prevent the door 1 from opening.
[0041]
Next, the operation of the door guard configured as described above will be described.
[0042]
In order to place the door guard in the guard state, first, as shown in FIG. 10, the locking member 4 is pushed into the slide hole 22 from the solid line position to the two-dot chain line position and switched to the disengageable position. The locking member 4 accurately moves from the separation preventing position to the separation allowing position by the action of the click stop mechanism. Thereby, the head 4 b of the locking member 4 is in a state where it can be inserted into the insertion / removal hole 10 of the arm member 2. In this state, the arm member 2 is rotated from the inverted position indicated by the two-dot chain line in FIG. 10 to the standing position indicated by the solid line with the pivot 7 as a fulcrum, and the locking member 4 is inserted into the insertion / removal hole 10. The arm member 2 is accurately stopped and held at the two-dot chain line position or the solid line position in FIG. 10 by the action of the click stop mechanism.
[0043]
Next, the locking member 4 is pulled out from the two-dot chain line position to the solid line position and switched to the separation preventing position. The locking member 4 accurately stops at the separation preventing position by the action of the click stop mechanism. Thereby, the head 4b protrudes on the circular arc 10a which used the pivot 7 of the edge of the insertion / removal hole 10 as a fulcrum, and prevents the arm member 2 from lying down. Even if an external force acts on the arm member 2 in this state, the arm member 2 does not fall to the inner surface 1a side of the door 1, and the door guard is held in a guard state.
[0044]
Further, at the same time as the locking member 4 is switched to the separation preventing position as described above, the door 1 is in a half-openable state, and the shaft portion 4a can be slid into the guide groove 11. Therefore, as the door 1 is opened, the edge of the guide groove 11 slides on the shaft portion 4a of the locking member 4, and as shown in FIG. 12, the closing piece 2c serving as the stop position of the arm member 2 contacts the shaft portion 4a. Touch. Thereby, the door 1 will be in a half-open state, will stop, and will not open any more. When the door 1 is in the half-opened state, even if a hand is inserted through the gap of the door 1 and the locking member 4 is slid in the axial direction, the head 4b is caught on the edge of the guide groove 11 to prevent this sliding. Switching of the member 4 to the separation allowable position is prevented.
[0045]
Further, for example, at bedtime, the door guard can function as a lock. In this case, the locking member 4 is pushed from the separation preventing position indicated by the solid line in FIG. 10 to the separation allowable position indicated by the two-dot chain line. . Thereby, since the head 4 b of the locking member 4 does not enter the guide groove 11, the locking member 4 is prevented from shifting from the insertion / removal hole 10 to the guide groove 11. Therefore, in addition to the main lock (not shown) provided on the door 1, this door guard serves as an auxiliary lock to enhance the locking effect of the door 1.
[0046]
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0047]
<Embodiment 3>
As shown in FIGS. 13 to 16, the door guard according to the third embodiment employs a locking member and switching means having a configuration different from that of the first or second embodiment.
[0048]
That is, in the first embodiment, the locking member 4 is rotated around its axis, and in the second embodiment, the locking member 4 is slid in the axial direction so that the separation preventing position and the separation allowing position are obtained. However, in the third embodiment, the locking member 4 is slid in a direction perpendicular to the axial direction of the shaft portion 4a to switch to the separation preventing position or the separation allowing position. It is like that.
[0049]
As shown in FIG. 13, the shaft portion 4 a of the locking member 4 is formed as a round shaft having a circular cross section that can be fitted into the guide groove 11. The head 4b is formed as a cylindrical piece having a diameter larger than the width of the guide groove 11, and a part of the head 4b functions as the protrusion 20 in the first embodiment. The shaft portion 4a is not limited to a round shaft, and may have other shapes such as a rectangular shaft with a rectangular cross section. The head 4b is not limited to a cylindrical piece, and may have other shapes such as a prismatic piece.
[0050]
As shown in FIGS. 13 to 16, a slide groove 27 extending in the vertical direction along the vertical direction of the entrance / exit frame 3 is formed in the receiving seat 16, and a slider 28 is fitted into the slide groove 27. The shaft portion 4a of the locking member 4 is fixed. The shaft portion 4a of the locking member 4 projects in the horizontal direction parallel to the inner surface 1a of the door 1 in the closed state. A click stop mechanism is interposed between the slider 28 and the receiving seat 16 as positioning means for the locking member 4. The click stop mechanism includes a ball 29 that is a convex portion embedded under the slide wall surface of the slide groove 27 of the seat 16, a spring 30 that biases the ball 29 toward the slider 28, and a direction perpendicular to the side surface of the slider 28. And two concave portions 31a and 31b formed along the same. The two concave portions 31a and 31b correspond to the separation preventing position and the separation allowing position of the locking member 4, respectively.
[0051]
When the slider 28 is slid in the slide groove 27 and the locking member 4 is switched from the disengagement allowable position shown in FIG. 13 to the disengagement prevention position shown in FIG. 14, the arm member 2 tries to rotate from the raised position to the inverted position. In addition, the head 4b of the locking member 4 comes into contact with the edge of the insertion / removal hole 10 as a protrusion, thereby preventing the arm member 2 from falling. In addition, as shown in FIG. 13, when the arm member 2 is erected in the closed state and the locking member 4 is inserted into the insertion / removal hole 10, the locking member 4 is switched from the release prevention position to the release allowable position. Since the shaft portion 4a is displaced from the entrance of the guide groove 11 in the insertion / removal hole 10, the movement of the locking member 4 into the guide groove 11 is prevented, and the door guard serves as a lock to prevent the door 1 from opening.
[0052]
Next, the operation of the door guard configured as described above will be described.
[0053]
In order to set the door guard to the guard state, first, the slider 28 is slid in the slider groove 27, and the locking member 4 is moved from the release preventing position shown in FIG. 14 to the release allowable position shown in FIG. The locking member 4 accurately moves from the separation preventing position to the separation allowing position by the action of the click stop mechanism. Thereby, the head 4 b of the locking member 4 is in a state where it can be inserted into the insertion / removal hole 10 of the arm member 2. In this state, the arm member 2 is rotated from the inverted position to the standing position with the pivot 7 as a fulcrum, and the locking member 4 is inserted into the insertion / removal hole 10.
[0054]
Next, the slider 28 is slid in the reverse direction in the slider groove 27 to switch the locking member 4 from the detachment allowable position shown in FIG. 13 to the detachment prevention position shown in FIG. The locking member 4 accurately stops at the separation preventing position by the action of the click stop mechanism. As a result, the head 4 b is locked to the edge of the insertion / removal hole 10 to prevent the arm member 2 from lying down. Even if an external force acts on the arm member 2 in this state, the arm member 2 does not fall on the inner surface 1a of the door 1, and the door guard is held in a guarded state.
[0055]
Further, as described above, at the same time when the locking member 4 is switched to the separation preventing position, the door 1 can be opened halfway and the shaft portion 4a can be slid into the guide groove 10. Therefore, as the door 1 is opened, the edge of the guide groove 11 slides on the shaft portion 4a of the locking member 4, and the closing piece 2c corresponding to the stop position of the arm member 2 is pivoted as shown in FIGS. It contacts the part 4a. Thereby, the door 1 will be in a half-open state, will stop, and will not open any more. In this half-open state of the door 1, even if a hand is inserted through the gap of the door 1 and the locking member 4 is slid on the slider groove 27, the shaft portion 4 a cannot move in the direction perpendicular to the guide groove 11. The switching of the locking member 4 to the disengagement allowable position is prevented.
[0056]
For example, at bedtime, the door guard can function as a lock. In this case, the locking member 4 is switched from the separation preventing position shown in FIG. 14 to the separation permissible position shown in FIG. Thereby, since the shaft portion 4 a of the locking member 4 does not enter the guide groove 11, the locking member 4 is prevented from shifting from the insertion / removal hole 10 to the guide groove 11. Therefore, in addition to the main lock (not shown) provided on the door 1, this door guard serves as an auxiliary lock to enhance the locking effect of the door 1.
[0057]
In the third embodiment, the same components as those in the first or second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0058]
<Embodiment 4>
As shown in FIG. 17, the door guard according to the fourth embodiment employs a locking member and a switching means having a configuration different from that of the second embodiment.
[0059]
That is, in the second embodiment, the locking member 4 is slid in the axial direction to switch to the separation preventing position or the separation allowing position. In the fourth embodiment, the locking member 4 is placed on a horizontal plane. By rotating it, it is switched to the separation preventing position or the separation allowing position.
[0060]
As shown in FIG. 17, the shaft portion 4a of the locking member 4 is pivotally supported on the seat 16 by a support shaft 32 extending in the vertical direction. A click stop mechanism as a positioning means is interposed between the shaft portion 4 a around the support shaft 32 and the seat 16. The click stop mechanism is formed around a ball 33 that is a convex portion embedded in the seat 16, a spring (not shown) that urges the ball 33 toward the shaft portion 4 a, and the support shaft 32 of the shaft portion 4 a. Two recesses (not shown) are provided. The two recesses correspond to the separation preventing position and the separation allowing position of the locking member, respectively.
[0061]
As shown in FIG. 17, when the locking member 4 is rotated about the support shaft 32 and switched from the disengagement allowable position indicated by the two-dot chain line to the disengagement prevention position indicated by the solid line, the arm member 2 is erected by the solid line. The head 4b of the locking member 4 intervenes as a protrusion on the arc 10a with the pivot 7 at the edge of the insertion / removal hole 10 as a fulcrum even if it is rotated from the position to the inverted position indicated by the two-dot chain line, 2 to prevent the falling action. Further, if the locking member 4 can be rotated more than the position indicated by the two-dot chain line in FIG. When the locking member 4 is inserted into the insertion / removal hole 10 and the locking member 4 is switched from the separation preventing position to the separation-permitted position, the head 4 b enters the guide groove 11 in the insertion / removal hole 10. Therefore, the movement of the locking member 4 into the guide groove 11 can be prevented, and the door guard can be used as a lock to prevent the door 1 from opening.
[0062]
Instead of the configuration in which the entire locking member 4 is inclined, the cross-sectional shape of the head 4b of the locking member 4 is an ellipse or a rectangle, and the head 4b can be rotated by a predetermined angle on the shaft portion 4a. By tilting the head 4b, the head 4b may be projected and retracted with respect to the track of the insertion / removal hole 10 of the arm member 2.
[0063]
Next, the operation of the door guard configured as described above will be described.
[0064]
In order to place the door guard in the guard state, first, the locking member 4 is rotated from the solid line position to the two-dot chain line position with the support shaft 32 as a fulcrum and switched to the disengagement allowable position. The locking member 4 accurately moves from the separation preventing position to the separation allowing position by the action of the click stop mechanism. Thereby, the head 4 b of the locking member 4 is in a state where it can be inserted into the insertion / removal hole 10 of the arm member 2. In this state, the arm member 2 is rotated from the inverted position indicated by the two-dot chain line to the standing position indicated by the solid line with the pivot 7 as a fulcrum, and the locking member 4 is inserted through the insertion / removal hole 10. The arm member 2 is accurately stopped and held at the two-dot chain line position or the solid line position by the action of the click stop mechanism.
[0065]
Next, the locking member 4 is rotated and inclined from the two-dot chain line position to the solid line position and switched to the separation preventing position. The locking member 4 accurately stops at the separation preventing position by the action of the click stop mechanism. Thereby, the head 4b protrudes on the circular arc 10a with the support shaft 32 at the edge of the insertion / removal hole 10 as a fulcrum, interferes with the arm member 2, and prevents the arm member 2 from falling sideways. Even if an external force acts on the arm member 2 in this state, the arm member 2 does not fall on the inner surface 1a of the door 1, and the door guard is held in a guarded state.
[0066]
Further, at the same time as the locking member 4 is switched to the separation preventing position as described above, the door 1 is in a half-openable state, and the shaft portion 4a can be slid into the guide groove 11. Therefore, as the door 1 is opened, the edge of the guide groove 11 slides on the shaft portion 4a of the locking member 4, and the closing piece 2c corresponding to the stop position of the arm member 2 comes into contact with the shaft portion 4a. Thereby, the door 1 will be in a half-open state, will stop, and will not open any more. When the door 1 is in the half-opened state, even if a hand is inserted through the gap of the door 1 and the locking member 4 is to be rotated, the head 4b prevents the rotation. Is prevented.
[0067]
For example, when sleeping, the door guard can function as a lock. In this case, the locking member 4 exceeds the disengagement allowable position indicated by the two-dot chain line in FIG. 17 from the disengagement prevention position indicated by the solid line in FIG. Rotate to position. Thereby, since the head 4 b of the locking member 4 faces the guide groove 11, the locking member 4 is prevented from shifting from the insertion / removal hole 10 to the guide groove 11. Therefore, in addition to the main lock (not shown) provided on the door 1, this door guard serves as an auxiliary lock to enhance the locking effect of the door 1.
[0068]
In the fourth embodiment, the same components as those in the first or second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0069]
【The invention's effect】
  According to the invention of claim 1,Release of the guard state of the door guard by carelessness, a suspicious person, etc. can be reliably prevented, and the crime prevention effect can be further enhanced.In addition, the door guard prevents the door from opening and closing as a lock. For example, the door guard is used as an auxiliary lock for the main lock of the door, or as an auxiliary lock when you forget to lock the door at bedtime. be able to.
[0072]
  Claim2According to the invention of claim1In the described door guard, since the door guard is provided with positioning means for restraining the locking member switched by the switching means at the separation allowable position or the separation prevention position, the locking member is accurately switched to the separation permission position or the separation prevention position. In addition, the locking member can be firmly held at the position after switching, and switching due to vibration, impact, or the like can be prevented.
[Brief description of the drawings]
FIG. 1 is a front view showing a door guard according to a first embodiment of the present invention in a state in which a locking member is switched to a disengagement allowable position.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
3 is a front view showing the door guard shown in FIG. 1 in a state in which a locking member is switched to a separation preventing position. FIG.
4 is a cross-sectional view taken along the line IV-IV in FIG. 3;
FIG. 5 is a partially cutaway side view showing the locking member switching device shown in FIG. 1;
6 is a rear view of the switching device for the locking member shown in FIG. 5. FIG.
7 is a partial front view showing the door guard shown in FIG. 3 with the door half open. FIG.
FIG. 8 is a view taken along line VIII-VIII in FIG.
FIG. 9 is a front view showing the door guard according to Embodiment 2 of the present invention in a state where the locking member is switched to the separation preventing position.
FIG. 10 is a cross-sectional view taken along line XX in FIG.
11 is an enlarged view showing a switching means for the locking member shown in FIG.
12 is a plan view showing the door guard shown in FIG. 10 with the door half open. FIG.
FIG. 13 is a front view showing the door guard according to Embodiment 3 of the present invention in a state where the locking member is switched to the disengagement allowable position.
14 is a front view showing the door guard shown in FIG. 13 in a state where the locking member is switched to the separation preventing position. FIG.
15 is a front view showing the door guard shown in FIG. 14 with the door half open. FIG.
16 is a cross-sectional view taken along line XVI-XVI in FIG.
FIG. 17 is a horizontal sectional view showing a door guard according to Embodiment 4 of the present invention.
[Explanation of symbols]
1 ... door
2 ... Arm member
3 ... Entrance / exit frame
4 ... Locking member
4a ... Shaft
10 ... insertion and removal holes
11 ... Guide groove
13 ... Ball
20 ... Protrusions
21 ... Lock part
22 ... Slide hole
23 ... Ball
28 ... Slider
29 ... Ball
32 ... support shaft
34 ... Round shaft

Claims

An arm member connected to the door in a tiltable manner;
A locking member attached to the doorway frame,
The arm member includes an insertion / removal hole through which the locking member is inserted / removed when the arm member is tilted in a closed state, and a guide groove connected to the insertion / removal hole that slides on the locking member to a stop position when the door is opened. In the door guard provided with
Switching means for switching the locking member between the separation preventing position and the separation allowing position with respect to the insertion / removal hole only in the closed state is provided,
When the locking member is switched from the separation allowable position to the separation preventing position by the switching means, the locking member is locked to the insertion / removal hole to prevent the arm member from being tilted and guided from the insertion / removal hole. The transition to the groove is allowed,
In a state where the locking member is switched from the separation preventing position to the separation allowing position by the switching means, the arm member can be raised and lowered, and the transition from the insertion / removal hole to the guide groove is prevented to open the door. Door Guard, characterized in that the blocking.

2. The door guard according to claim 1, further comprising positioning means for restraining the locking member that is switched by the switching means to a separation allowing position or a separation preventing position.