JP3881321B2

JP3881321B2 - Folding door door twist prevention bracket

Info

Publication number: JP3881321B2
Application number: JP2003120909A
Authority: JP
Inventors: 俊雄御器谷; 隆之来栖
Original assignee: Nitto Kohki Co Ltd
Current assignee: Nitto Kohki Co Ltd
Priority date: 2003-04-25
Filing date: 2003-04-25
Publication date: 2007-02-14
Anticipated expiration: 2023-04-25
Also published as: JP2004324237A

Description

【０００１】
【産業上の利用分野】
本発明は、複数枚のドアを横並びに連結し、普段は折畳んで収納しておくとともに、非常時等には展開して廊下等の所定の開口部を閉鎖する防火ドア等に好適な折り戸に係り、特に展開した各ドアのうち吊り元側ドアの捩じれや傾きを防止することができる折り戸のドアネジレ防止金具に関するものである。
【０００２】
【従来の技術】
普段は（壁側の）戸袋に折畳んで収納しておくとともに、火災等の非常時には展開して廊下等の所定の開口部を閉鎖する防火用の折り戸が開発され使用されている。
このような折り戸は近年防火ドア等に多く採用されており、２枚折、３枚折等のドアが多く使用されている。この場合、吊り先側ドアのドア重量により、図１５に示すように吊り元側ドアにネジレが生じ、吊り先側ドアの先端部が下がり、床に当って開閉に支障を生じる場合がある。また、ドアの軽量化、低コスト化を図っているため、ドアの強度が低下しており、こうしたドアのネジレの問題が数多く発生している。
上記のような折り戸としては特許文献１に記載されたものが知られている。
【０００３】
【特許文献１】
特開２０００１−３６２８
【０００４】
上記公報に記載の折り戸の閉鎖保持装置（後述する本発明の折り戸のドアネジレ防止用金具に対応）の概略を簡単に説明すると、図１２は折り戸の閉鎖保持装置の概略平面図、図１３はこの折り戸の閉鎖保持装置の作用を説明する図、図１４は同装置のロック作動状態を説明する図である。
この折り戸の閉鎖保持装置１０１は、図１２〜図１４に示すようにストップ部材１０２と、テーパ部材１０３と、押さえ部材１０４と、受け部材１０５とを備えている。
ストップ部材１０２は、第１ドア（以下吊り元側ドアという）Ａの戸先上部に設けたケーシング１２０に上下動自在に内装されており、この同じケーシング１２０に内設する（圧縮）ばね１２１の弾性力により常時付勢されて上方に突出可能になっている。ストップ部材１０２の先端（上端）部側には２段の傾斜面を有するテーパが形成されており、上段２Ｕの方の傾斜を下段２Ｄより緩くして後述する受け部材１０５の挿入穴１５１へ挿入し易くなっている。
【０００５】
テーパ部材１０３は、ストップ部材１０２に固定して取り付けてあり下側に向けて外側へ拡開した傾斜面形状を有している。また、このテーパ部材１０３は、第１ドアＡの上部側面に一部設けた窓Ｗから突出するとともに、第１ドアＡに対してストップ部材１０２と一体で上下方向に移動できるようになっている。
押さえ部材１０４は、比較的剛性のある薄板状の金属等を略Ｌ字型に折曲して形成されており、第１ドアＡ、第２ドア（吊り先側ドア）Ｂを折り畳んだときに図１３に示すようにその第１ドアＡと対向・対面する第２ドアＢの側面上部に固着されている。
【０００６】
図１３に示すように、第１ドアＡ、第２ドアＢを折り畳んだときに、押さえ部材１０４の突出部１４１がテーバ部材１０３のカバー１２２に開口した穴１２２Ａから丁度内部に進入してテーパ部材１０３を下方に押し下げ、ストップ部材１０２が第１ドアＡの上面から突出しないようになっている。
受け部材１０５は、中央部に略矩形状の挿入穴１５１を穿設させており、ストップ部材１０２の下段２Ｄ外周面が挿入穴１５１に内接・密着するように構成されている。
【０００７】
上記構成からなる折り戸の閉鎖保持装置は各ドアが折畳まれロック装置により互いに一体に結合され戸袋内に収納されている。火災等の異常事態が発生すると、これを検知した図示しない電磁レリーズが作動し、戸袋内での第２ドアＢ側の保持動作を解除すると第２ドアＢ側及びこの第２ドア側と一体に結合されている第１ドアＡが戸袋から抜け出して一体に展開を始める。第１ドアＡの展開動作の完了直前にこの第１ドアＡの展開完了動作に先立ち、図示しないロック装置（ドアキャッチャ）が作動して第２ドアＢを開放し始める。この第２ドアＢの開放動作に連動して第１ドアＡのケーシング１２０の収まっていたストップ部材１０２が上方に突出し、第１ドアＡが最終位置近傍まで展開（回動）してくると、ストップ部材１０２の先端部側が挿入穴１５１に挿入・嵌合されるので戸先側が確実に前記上枠等に固定されるものである。
【０００８】
【発明が解決しようとする課題】
ところで、上記折り戸の閉鎖保持装置は、以下のような問題点を有している。即ち、前記閉鎖保持装置は、第１ドア内に内蔵形式となっているため、既に使用されている折り戸での後付けが出来ず、このような閉鎖保持装置を採用する場合にはドア毎の交換か、ドアを大幅に改造する必要があり、工事費用、ドア部品費用などがかかる等の問題があり、簡単には利用することができない。
また、ストップ部材に固定してあるテーパ部材が第２ドア側に突出して設けてあるため、このテーバ部材の突出分だけ第１ドア、第２ドアを折り畳んだ状態の時に厚さが厚くなり、ドアの収納スペース効率が悪くなる、等の問題がある。
【０００９】
そこで、本発明は上記した事情に鑑み、折り戸を展開し所定の場所を閉鎖する際に、前記吊り元側ドアを上枠等に確実に固定して捩じれや傾きを防止することができる後付けの折り戸のドアネジレ防止金具を提供することを目的とする。そしてすでに使用されているドアに対してもドアネジレ防止金具を取り付けることにより、吊り元側ドア上部に取り付けたネジレ防止金具により戸先ドア重量によるドアのネジレを防ぎ、ドアのスムーズな閉扉をおこなうことを可能にする。
【００１０】
【課題を解決するための手段】
このため、本発明が採用した技術解決手段は、
少なくとも二枚折り戸に後付け可能なドアネジレ防止金具において、前記ドアネジレ防止金具は吊り元側ドア側面に着脱可能な本体を備え、前記本体内に、スプリングの付勢力によって吊り元側ドア外周から外方に向かって進出し上枠ドア支持部材受に形成した挿入穴に嵌合するドア支持部材を有し、前記ドア支持部材には操作シャフトが吊り元側ドア側面と平行に、かつ、操作シャフトの両端が前記本体から突出するように取り付けられ、前記吊り元側ドアの面に対向する吊り先側ドア側面には、前記本体から突出した操作シャフトの両端を内方に向けて押圧し、前記スプリングの付勢力に抗してドア支持部材を吊り元側ドア外周から内方にむけて移動するための断面コ字状の操作部材を取り付け、吊り元側ドア、吊り先側ドアを格納した状態の時には、前記断面コ字状の操作部材の下面が操作シャフトの両端を内方に押圧することによりドア支持部材が吊り元側ドアの外周より内側に収納された状態となり、吊り元側ドア、吊り先側ドアを開いた状態の時には、前記操作部材と操作シャフトが離脱しスプリングの付勢力によってドア支持部材が吊り元側ドアの外周より外側に進出するべく構成したことを特徴とする折り戸のドアネジレ防止金具である。また、前記断面コ字状の操作部材の下面は操作シャフトを下方に向けて押圧するための傾斜面として構成されていることを特徴とする折り戸のドアネジレ防止金具である。
また、前記ドア支持部材の先端は、クサビ状に形成されていることを特徴とする折り戸のドアネジレ防止金具である。
【００１１】
【実施形態】
以下、本発明の実施形態を図面に基づいて説明する。
図１は本実施形態に係る折り戸のドアネジレ防止金具の取り付け状態の斜視図、図２（イ）は同ドアネジレ防止金具の本体平面図、（ロ）は同正面図、（ハ）は同側面図、図３（イ）（ロ）（ハ）は同ドアネジレ防止金具を構成する操作部材の正面図、平面図、側面図、図４は同ネジレ防止金具を吊り元側ドア、吊り先側ドアに取り付けた状態の側面図、図５は図４中のＡ−Ａ断面図、図６は吊り元側ドア、吊り先側ドアを開きつつある状態のネジレ防止金具の側面図、図７は図６中のＢ−Ｂ断面図である。
【００１２】
図１において、吊り元側ドアＡにはドアネジレ防止金具の本体１が取り付けられており、また対向する吊り先側ドアＢの壁面には操作部材１０が取り付けられている。
図２、図４、図５において、ドアネジレ防止金具の本体１の上下にはフランジ２が形成され、このフランジ２には孔２ａが形成されこの孔２ａを利用してボルト等で本体１を吊り元側ドアＡの側面に固定できるようになっている。本体１の中心部には、棒状をしたドア支持部材（図５参照）３が図中上下方向に摺動自在に設けられており、ドア支持部材３の下端側にはドア支持部材３を図中上方に付勢するスプリング４が配置されている。スプリング４は本体１に螺合した固定ネジ５とドア支持部材３の下端との間に配置されている。ドア支持部材３には、操作シャフト６が前記フランジと平行に設けれら、操作シャフト６の両端は、本体１に形成した長孔７から突出する長さとして形成されている。ドア支持部材３の上端は、端部に向かって径が細くなるテーパー状に形成されており、このテーパー部が上枠ドア支持部材受８に形成した挿入穴９（図６、図７参照）に嵌合できるようになっている。
【００１３】
図３において、前記操作シャフト６と当接する前記操作部材１０は、図３（ロ）に示すように平面視において略コ字状をしており、コ字状の両側下面は前記操作シャフト６を下方に向けて押圧するために傾斜面１１として形成されており、この操作部材１０は吊り先側ドアＢの対応する位置にボルト等の固定手段により固定される構成となっている
また、吊り元側ドアＡを開いた状態の上部の上枠ドア支持部材受８には前記ドア支持部材３の上端が嵌合する挿入穴９（図６、図７参照）が形成されている。
【００１４】
吊り元側ドアＡと吊り先側ドアＢとを折り畳んだ収納状態の側面図を図４に示す。図４に示すように吊り元側ドアＡと吊り先側ドアＢとを折り畳んだ収納状態の時には吊り先側ドアＢ側の操作部材１０が吊り元側ドアＡに接近し、操作部材１０の傾斜面１１が前記操作シャフト６に当接し、操作部材１０の下面に形成した傾斜面１１によって操作シャフト６を図５に示すように下方に移動させる。この状態の時は、ドア支持部材３は本体１内にスプリング４の付勢力に抗して収納された状態となっている。
【００１５】
また、図６、図７において吊り先側ドアＢが矢印方向Ｃに開いてゆくと、操作部材１０が後退し、これに伴ってスプリング４によって付勢されているドア支持部材３が図７中上方に移動し、上枠ドア支持部材受８に形成した挿入穴９に嵌合し、吊り元側ドアの先端側を支持できるようになっている。
【００１６】
上記構成からなる折り戸の作動を図８（イ）（ロ）（ハ）及び、図９を参照して説明すると、図８（イ）、図９に示す戸袋収納時において、例えば火災等が発生すると、戸袋内に折り畳まれたドアの吊り先側ドアＢと戸袋壁もしくは戸袋上枠との間に取り付けられている電磁レリーズ１２（煙、熱感知ドア解除装置）が作動し、吊り先側ドアＢの保持を解除する。吊り元側ドアＡに取り付けられているクローザ１３の閉じ力にて折り戸（畳んだ状態）が一体にて閉じ動作を開始する。この状態までは、ドア支持部材３は吊り元側ドアＡ側の本体１内に（吊り元側ドアＡの上面から突出しない状態で）収納されている。
【００１７】
吊り元側ドアＡが閉じ、閉鎖開口部Ｄに達すると、吊り元側ドアＡと吊り先側ドアＢとの間に取り付けられ、吊り先側ドアＢの閉じ力（吊り元側ドアＡと吊り先側ドアＢとの間に取り付けられているクローザ１４）に抗し、ドアを保持しているドアキャチ１５が閉鎖開口部Ｄの上枠に当たり、保持を解除する。吊り元側ドアＡの閉じと同時に、吊り先側ドアＢに取り付けた操作部材１０が次第に吊り元側ドアＡから離れる（図８（ロ）参照）。この操作部材１０の移動によって操作シャフト６から離れるに連れ、吊り元側ドアＡのドア支持部材３がスプリング４の作用によって上方に突出する。そして最終的には操作部材１０が操作シャフト６から離れ、ドア支持部材３がスプリング４の付勢力によって上方に押し出される。これにより、上枠ドア支持部材受８に形成した挿入穴９にドア支持部材３が嵌合し、吊り元側ドアＡを固定する（図８（ハ）参照）。
【００１８】
そしてこのドア支持部材３がつっかい棒のように作用して吊り元側ドアの戸先部をしっかりとささえ、上部の上枠ドア支持部材受８に固定される。こうして前記吊り元側ドアの戸先側は上枠に確実に固定され、不安定な捩じれや傾き等の発生する虞れが最小限に抑えられる。その後吊り元側ドアＡがしっかりと支持されることにより、幅広、大重量の折りドアであっても、捩じれや傾きの防止をしっかりと行うことができる。これにより、幅広で大重量の防火用折りドアであっても、長期に亙り信頼度の高い防火用折り戸が提供できる。
【００１９】
なお、この実施例において、各ドアを折り畳んで元の戸袋に戻すときには、ここで説明したことと逆の動作を行い、上昇していたドア支持部材３も元の本体１内に戻る。
【００２０】
上記例では吊り元側ドアの先端上部にドアネジレ防止金具を取り付けた例を説明したが、このドアネジレ防止金具を吊り元側ドアの先端下部に取り付けることも可能である。この場合上述したものと同じ構成のものを採用することができるが、床側に戸当の枠に形成する嵌合部を形成することが難しいため、この場合には図１０、図１１に示すドアネジレ防止金具を使用することができる。
【００２１】
図１０は吊り元側ドアの下部に取り付けるドアネジレ防止金具の第１例である。この例では、本体１、ドア支持部材３、操作シャフト６、操作部材１０、スプリング４等は上記例と全く同様であるが、ドア支持部材３の先端が床面に確りと固定するように先端が楔状（図１０矢印方向から見てドアの壁面と平行な尖った先端で形成されている）に形成されている点が本例の特徴である。
【００２２】
図１１は吊り元側ドアの下部に取り付けるドアネジレ防止金具の第２例である。この例では、本体１に取り付けるドア支持部材３を軸１５を中心に揺動自在に設け、一体を本体１を吊り元側ドアＡに取り付けるための本体１のプレートに支持され、他端をドア支持部材３に設けられた支持軸１７に支持されたコイルスプリング１６によって下方に向けて付勢された構成となっている。また吊り先側ドアＡには、格納時にはドア支持部材３を押すことができる操作部材１８が設けられ、折り戸が格納状態の時には、操作部材８が支持軸１７を押し上げることにより、ドア支持部材３がコイルスプリング１６の付勢力に抗して上方に揺動した状態となっており（図１１に示す状態）、ドアを開放した時にはコイルスプリング１６の付勢力により押し下げることにより、ドア支持部材３が下方に移動し、床面と係合し、吊り元側ドアを確りと支持できるようにしている。
【００２３】
以上詳述したように本実施形態では、折り戸を展開し所定の場所を閉鎖する際に、前記吊り元側ドアを上枠等に確実に固定して捩じれ傾きを防止することができる折り戸のドアネジレ防止金具を提供することができ、この結果、吊り元側ドア上部に取り付けたネジレ防止金具の作用により戸先ドア重量によるドアのネジレを防ぎ、ドアのスムーズな閉扉をおこなうことを可能にする。
なおネジレ防止金具をドアの上方のみあるいは上下に設けるかは、ドアの状況に応じて自由に選択できることは当然である。また、上記例は二枚折り戸を中心に説明したが、三枚折り以上の折りドアにも同様に適用することができることは当然である。
また、上記実施形態は例示にすぎず、本発明の精神または主要な特徴から逸脱することなく本発明は他の色々な形で実施することができ、限定的に解釈してはならない。
【００２４】
【発明の効果】
以上詳細に説明したように本発明では、ネジレ防止金具を吊り元側ドアに外付け可能な構成としたため、すでに使用されている折り戸でのドアネジレ防止金具を簡単に後付けすることができ、ドアのネジレを確実に防止できる。
また、ドア支持部材に吊り元側ドア壁面に平行に操作シャフトを設けたため吊り先側ドアを折り畳んだ状態の時のドアの厚さが余り厚く成らず、収納スペースがとられる等の問題を解消できる、等の優れた作用効果を奏することができる。
【図面の簡単な説明】
【図１】本実施形態に係る折り戸のドアネジレ防止金具の取り付け状態の斜視図である。
【図２】（イ）は同ドアネジレ防止金具の平面図、（ロ）は本体１側正面図、（ハ）は同側面図である。
【図３】（イ）（ロ）（ハ）は同ドアネジレ防止金具を構成する操作部材１０の正面図、平面図、側面図である。
【図４】同ネジレ防止金具を吊り元側ドア、吊り先側ドアに取り付けた状態の側面図である。
【図５】図４中のＡ−Ａ断面図である。
【図６】吊り元側ドア、吊り先側ドアを開いた状態のネジレ防止金具の側面図である。
【図７】図６中のＢ−Ｂ断面図である。
【図８】本発明に係るネジレ防止金具の作動説明図である。
【図９】本発明に係るネジレ防止金具を装着したドアの作動説明図である。
【図１０】ドア下方に取り付けるネジレ防止金具の構成図である。
【図１１】ドア下方に取り付ける他の例のネジレ防止金具の構成図である。
【図１２】従来の折り戸の閉鎖保持装置の概略平面図である。
【図１３】従来の折り戸の閉鎖保持装置の作用を説明する図である。
【図１４】同装置のロック作動状態を説明する図である。
【図１５】従来の折り戸の不都合を説明する図である。
【符号の説明】
Ａ吊り元側ドア
Ｂ吊り先側ドア
１本体
２フランジ
３ドア支持部材
４スプリング
５固定ネジ
６操作シャフト
７長孔
８上枠ドア支持部材受
９挿入穴
１０操作部材
１１傾斜面
１２電磁レリーズ
１３クローザ
１４クローザ
１５ドアキャッチ
１６コイルスプリング
１７支持軸
１８操作部材
Ｄ閉鎖開口部[0001]
[Industrial application fields]
In the present invention, a plurality of doors are connected side by side and are usually folded and stored. In addition, the doors are folded in a suitable manner for fireproof doors that unfold in an emergency or the like and close predetermined openings such as corridors. In particular, the present invention relates to a door twist prevention metal fitting for a folding door that can prevent twisting and tilting of a suspension side door among deployed doors.
[0002]
[Prior art]
In general, fire-folding folding doors have been developed and used that are folded and stored in a door pocket (on the wall side) and that are opened in an emergency such as a fire to close a predetermined opening such as a corridor.
In recent years, such folding doors have been widely used for fire doors and the like, and doors such as two-fold and three-fold are often used. In this case, depending on the door weight of the suspension side door, as shown in FIG. 15, twisting occurs in the suspension side door, the tip of the suspension side door is lowered, and it may hit the floor and hinder opening and closing. Further, since the door is lightened and the cost is reduced, the strength of the door is reduced, and many problems of such twisting of the door have occurred.
As such a folding door, the one described in Patent Document 1 is known.
[0003]
[Patent Document 1]
JP20001-3628
[0004]
The outline of the closing and holding apparatus for folding doors described in the above publication (corresponding to the fitting for preventing door twisting of the folding door according to the present invention described later) will be briefly described. FIG. 12 is a schematic plan view of the closing and holding apparatus for folding doors. 13 is a diagram for explaining the operation of the folding door closing and holding device, and FIG. 14 is a diagram for explaining a locking operation state of the device.
As shown in FIGS. 12 to 14, the folding door closing and holding device 101 includes a stop member 102, a tapered member 103, a pressing member 104, and a receiving member 105.
The stop member 102 is housed in a casing 120 provided at the top of the door of the first door (hereinafter referred to as the suspension side door) A so as to be movable up and down, and a (compression) spring 121 of the same casing 120 is provided. It is always urged by the elastic force and can protrude upward. A taper having a two-step inclined surface is formed on the tip (upper end) portion side of the stop member 102, and the inclination of the upper step 2U is made gentler than that of the lower step 2D and inserted into an insertion hole 151 of the receiving member 105 described later. It is easy to do.
[0005]
The taper member 103 is fixedly attached to the stop member 102 and has an inclined surface shape that expands outward toward the lower side. Further, the taper member 103 protrudes from a window W partially provided on the upper side surface of the first door A, and can move in the vertical direction integrally with the stop member 102 with respect to the first door A. .
The holding member 104 is formed by bending a relatively rigid thin plate-like metal or the like into a substantially L shape, and when the first door A and the second door (hanging side door) B are folded. As shown in FIG. 13, it is fixed to the upper part of the side surface of the second door B facing and facing the first door A.
[0006]
As shown in FIG. 13, when the first door A and the second door B are folded, the protrusion 141 of the pressing member 104 just enters the inside through the hole 122 </ b> A opened in the cover 122 of the taber member 103, and is a tapered member. 103 is pushed down so that the stop member 102 does not protrude from the upper surface of the first door A.
The receiving member 105 has a substantially rectangular insertion hole 151 formed in the center thereof, and is configured such that the lower 2D outer peripheral surface of the stop member 102 is inscribed and in close contact with the insertion hole 151.
[0007]
In the folding door closing and holding device having the above-described configuration, the doors are folded and joined together by a locking device and housed in a door pocket. When an abnormal situation such as a fire occurs, an electromagnetic release (not shown) that detects this is activated, and when the holding operation on the second door B side in the door pocket is released, the second door B side and the second door side are integrated. The combined first door A comes out of the door pocket and begins to be integrated. Immediately before completion of the unfolding operation of the first door A, prior to the unfolding operation of the first door A, a locking device (door catcher) (not shown) is activated to start opening the second door B. When the stop member 102 housed in the casing 120 of the first door A projects upward in conjunction with the opening operation of the second door B, the first door A expands (rotates) to the vicinity of the final position. Since the distal end side of the stop member 102 is inserted and fitted into the insertion hole 151, the door end side is securely fixed to the upper frame or the like.
[0008]
[Problems to be solved by the invention]
By the way, the above-described folding door closing and holding device has the following problems. That is, since the closing and holding device is built in the first door, it cannot be retrofitted with a folding door that has already been used. It is necessary to replace or significantly modify the door, and there are problems such as high construction costs and door parts costs, so it cannot be used easily.
Further, since the taper member fixed to the stop member is provided so as to protrude to the second door side, the thickness increases when the first door and the second door are folded by the protrusion of the taber member, There is a problem that the storage space efficiency of the door is deteriorated.
[0009]
Therefore, in view of the circumstances described above, the present invention is a retrofit that can prevent twisting and tilting by securely fixing the suspension side door to an upper frame or the like when the folding door is expanded and a predetermined place is closed. An object of the present invention is to provide a door twist prevention metal fitting for a folding door. And by attaching a door twist prevention bracket to the door that is already in use, the twist prevention bracket attached to the upper part of the suspension side door prevents the door from twisting due to the weight of the door to the door, and the door closes smoothly. Enable.
[0010]
[Means for Solving the Problems]
For this reason, the technical solution means adopted by the present invention is:
A door twist prevention bracket that can be retrofitted to at least a two-fold door, wherein the door twist prevention bracket includes a body that can be attached to and detached from a suspension side door side surface, and the inside of the body is outward from the suspension door outer periphery by a biasing force of a spring. A door support member that is fitted into an insertion hole formed in the upper frame door support member receiver and has an operation shaft parallel to the suspension side door side surface and the operation shaft Both ends are attached so as to protrude from the main body, and both ends of the operation shaft protruding from the main body are pressed inward on the side surface of the suspension side door facing the surface of the suspension side door, and the spring An operation member with a U-shaped cross-section for moving the door support member inward from the outer periphery of the suspension side door against the urging force is attached, and the suspension side door and the suspension side door are stored. When the state becomes a state of being accommodated from the outer circumference of the hanging root side door door support member inwardly by the lower surface of the U-shaped cross section of the operating member presses the ends of the actuation shaft inward hanging root side door The folding member is configured such that when the suspension side door is in an open state, the operation member and the operation shaft are separated from each other, and the door support member is moved outward from the outer periphery of the suspension side door by the biasing force of the spring. This is a door door twist prevention metal fitting. The lower surface of the operation member having a U-shaped cross-section is configured as a door twist prevention metal fitting for a folding door , wherein the lower surface is configured as an inclined surface for pressing the operation shaft downward .
Further, the door support member has a wedge-shaped anti-twisting metal fitting that is formed in a wedge shape.
[0011]
Embodiment
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a state in which the door twist prevention metal fitting of the folding door according to the present embodiment is attached, FIG. 2 (a) is a plan view of the main body of the door twist prevention metal fitting, (B) is the front view, and (C) is the same side surface. FIGS. 3A, 3B, 3C are a front view, a plan view, and a side view of an operation member constituting the door twist prevention metal fitting. FIG. FIG. 5 is a cross-sectional view taken along the line AA in FIG. 4, FIG. 6 is a side view of the anti-twist fitting when the suspension side door and the suspension side door are being opened, and FIG. 6 is a BB cross-sectional view in FIG.
[0012]
In FIG. 1, the main body 1 of the door twist prevention metal fitting is attached to the suspension source side door A, and the operation member 10 is attached to the wall surface of the suspension destination side door B which opposes.
2, 4, and 5, a flange 2 is formed on the top and bottom of the main body 1 of the door twist prevention metal fitting, and a hole 2 a is formed in the flange 2, and the main body 1 is suspended with a bolt or the like using the hole 2 a. It can be fixed to the side of the former door A. A rod-like door support member (see FIG. 5) 3 is provided at the center of the main body 1 so as to be slidable in the vertical direction in the figure, and the door support member 3 is illustrated on the lower end side of the door support member 3. A spring 4 is arranged to urge the middle upward. The spring 4 is disposed between a fixing screw 5 screwed into the main body 1 and the lower end of the door support member 3. An operation shaft 6 is provided on the door support member 3 in parallel with the flange, and both ends of the operation shaft 6 are formed to protrude from a long hole 7 formed in the main body 1. The upper end of the door support member 3 is formed in a taper shape with a diameter decreasing toward the end portion, and an insertion hole 9 formed in the upper frame door support member support 8 by this taper portion (see FIGS. 6 and 7). Can be fitted to.
[0013]
In FIG. 3, the operating member 10 that contacts the operating shaft 6 is substantially U-shaped in plan view as shown in FIG. It is formed as an inclined surface 11 for pressing downward, and this operation member 10 is configured to be fixed to a corresponding position of the suspension destination side door B by a fixing means such as a bolt. An insertion hole 9 (see FIGS. 6 and 7) into which the upper end of the door support member 3 is fitted is formed in the upper frame door support member receiver 8 in the state where the side door A is opened.
[0014]
FIG. 4 shows a side view of the storage state in which the suspension side door A and the suspension destination side door B are folded. As shown in FIG. 4, when the suspension side door A and the suspension side door B are folded, the operation member 10 on the suspension side door B approaches the suspension side door A, and the operation member 10 is inclined. The surface 11 abuts on the operation shaft 6, and the operation shaft 6 is moved downward as shown in FIG. 5 by the inclined surface 11 formed on the lower surface of the operation member 10. In this state, the door support member 3 is housed in the main body 1 against the urging force of the spring 4.
[0015]
6 and 7, when the suspension destination side door B opens in the arrow direction C, the operation member 10 is retracted, and the door support member 3 urged by the spring 4 along with this is shown in FIG. 7. It moves upward and fits into an insertion hole 9 formed in the upper frame door support member receiver 8 so that the front end side of the suspension side door can be supported.
[0016]
The operation of the folding door having the above configuration will be described with reference to FIGS. 8 (a), (b), and (c) and FIG. 9. When the door pockets shown in FIGS. When this occurs, the electromagnetic release 12 (smoke and heat sensing door release device) attached between the door B of the door folded in the door pocket and the door pocket wall or the upper frame of the door pocket is actuated, and the suspension side Release the holding of door B. The folding door (folded state) is integrally closed by the closing force of the closer 13 attached to the suspension door A. Until this state, the door support member 3 is accommodated in the main body 1 on the suspension side door A side (in a state where it does not protrude from the upper surface of the suspension side door A).
[0017]
When the suspension door A closes and reaches the closing opening D, the suspension door A is attached between the suspension door A and the suspension door B, and the closing force of the suspension door B (the suspension door A and suspension) Against the closer 14) attached to the front door B, the door cab 15 holding the door hits the upper frame of the closing opening D and releases the holding. Simultaneously with closing of the suspension source side door A, the operation member 10 attached to the suspension destination side door B gradually moves away from the suspension source side door A (see FIG. 8B). As the operation member 10 moves away from the operation shaft 6, the door support member 3 of the suspension side door A protrudes upward by the action of the spring 4. Finally, the operation member 10 is separated from the operation shaft 6, and the door support member 3 is pushed upward by the urging force of the spring 4. As a result, the door support member 3 is fitted into the insertion hole 9 formed in the upper frame door support member receiver 8, and the suspension side door A is fixed (see FIG. 8C).
[0018]
The door support member 3 acts like a stick and firmly supports the door end of the suspension side door, and is fixed to the upper frame door support member receiver 8. Thus, the door end side of the suspension side door is securely fixed to the upper frame, and the possibility of occurrence of unstable twisting or tilting is minimized. Thereafter, the suspension door A is firmly supported, so that even a wide and heavy folding door can be securely prevented from being twisted or tilted. Thereby, even if it is a wide and heavy weight fireproof folding door, a fireproof folding door with high reliability can be provided over a long period of time.
[0019]
In this embodiment, when each door is folded and returned to the original door pocket, the operation reverse to that described here is performed, and the door support member 3 that has been raised also returns to the original main body 1.
[0020]
In the above example, the door twist prevention metal fitting is attached to the upper end of the suspension side door, but this door twist prevention metal fitting can also be attached to the lower end of the suspension side door. In this case, the same configuration as described above can be adopted, but since it is difficult to form a fitting portion formed on the floor frame on the floor side, in this case, as shown in FIGS. Door twist prevention metal fittings can be used.
[0021]
FIG. 10 is a first example of a door twist prevention metal fitting attached to the lower part of the suspension side door. In this example, the main body 1, the door support member 3, the operation shaft 6, the operation member 10, the spring 4 and the like are exactly the same as the above example, but the front end of the door support member 3 is firmly fixed to the floor surface. Is formed in a wedge shape (formed with a sharp tip parallel to the wall surface of the door as viewed from the direction of the arrow in FIG. 10).
[0022]
FIG. 11 is a second example of a door twist prevention metal fitting attached to the lower part of the suspension side door. In this example, a door support member 3 attached to the main body 1 is provided so as to be swingable about a shaft 15, and is integrally supported by a plate of the main body 1 for attaching the main body 1 to the suspension side door A, and the other end is a door. It is configured to be biased downward by a coil spring 16 supported by a support shaft 17 provided on the support member 3. Further, the suspension door A is provided with an operation member 18 that can push the door support member 3 when retracted. When the folding door is in the retracted state, the operation member 8 pushes up the support shaft 17 so that the door support member is pushed. 3 swings upward against the urging force of the coil spring 16 (the state shown in FIG. 11). When the door is opened, the door support member 3 is pushed down by the urging force of the coil spring 16. Moves downward and engages the floor so that the suspension side door can be securely supported.
[0023]
As described above in detail, in this embodiment, when the folding door is deployed and a predetermined place is closed, the folding door can be securely fixed to the upper frame or the like to prevent twisting and tilting. Door twist prevention metal fittings can be provided. As a result, the twist prevention metal fittings attached to the upper part of the suspension side door prevent the door from being twisted due to the weight of the door to the door, making it possible to smoothly close the door. To do.
Of course, whether the anti-twist bracket is provided only above or below the door can be freely selected according to the condition of the door. Moreover, although the said example demonstrated centering on the two-fold folding door, it is natural that it can apply similarly to the folding door more than three-fold.
The above-described embodiments are merely examples, and the present invention can be implemented in various other forms without departing from the spirit or main features of the present invention, and should not be interpreted in a limited manner.
[0024]
【The invention's effect】
As described in detail above, in the present invention, since the anti-twist bracket is configured to be externally attached to the hanging door, the door anti-twist bracket can be easily retrofitted in the already used folding door. Can be reliably prevented.
In addition, since the operation shaft is provided in parallel with the suspension side door wall surface on the door support member, the problem of the storage space being taken up because the door thickness does not become too thick when the suspension side door is folded. And the like.
[Brief description of the drawings]
FIG. 1 is a perspective view of a state in which a door twist prevention metal fitting of a folding door according to the present embodiment is attached.
2A is a plan view of the door twist prevention metal fitting, FIG. 2B is a front view of the main body 1 side, and FIG. 2C is a side view of the same.
3A, 3B, and 3C are a front view, a plan view, and a side view of an operating member 10 that constitutes the door twist prevention metal fitting.
FIG. 4 is a side view showing a state in which the anti-twist bracket is attached to a suspension side door and a suspension side door.
5 is a cross-sectional view taken along line AA in FIG.
FIG. 6 is a side view of the anti-twist bracket with the suspension side door and the suspension side door open.
7 is a cross-sectional view taken along the line BB in FIG.
FIG. 8 is an operation explanatory view of the anti-twist fitting according to the present invention.
FIG. 9 is an operation explanatory view of a door equipped with the anti-twist fitting according to the present invention.
FIG. 10 is a configuration diagram of a twist prevention metal fitting to be attached below the door.
FIG. 11 is a configuration diagram of another example of the anti-twist bracket that is attached below the door.
FIG. 12 is a schematic plan view of a conventional folding door closing and holding device.
FIG. 13 is a view for explaining the operation of a conventional folding door closing and holding device.
FIG. 14 is a diagram illustrating a lock operation state of the device.
FIG. 15 is a diagram for explaining disadvantages of a conventional folding door.
[Explanation of symbols]
A Lifting source side door B Hanging point side door 1 Body 2 Flange 3 Door support member 4 Spring 5 Fixing screw 6 Operation shaft 7 Long hole 8 Upper frame door support member receiver 9 Insertion hole 10 Operation member 11 Inclined surface 12 Electromagnetic release 13 Closer 14 Closer 15 Door catch 16 Coil spring 17 Support shaft 18 Operation member D Closing opening

Claims

A door twist prevention bracket that can be retrofitted to at least a two-fold door, wherein the door twist prevention bracket includes a body that can be attached to and detached from a suspension side door side surface, and the inside of the body is outward from the suspension door outer periphery by a biasing force of a spring. A door support member that is fitted into an insertion hole formed in the upper frame door support member receiver and has an operation shaft parallel to the suspension side door side surface and the operation shaft Both ends are attached so as to protrude from the main body, and both ends of the operation shaft protruding from the main body are pressed inward on the side surface of the suspension side door facing the surface of the suspension side door, and the spring An operation member with a U-shaped cross-section for moving the door support member inward from the outer periphery of the suspension side door against the urging force is attached, and the suspension side door and the suspension side door are stored. When the state becomes a state of being accommodated from the outer circumference of the hanging root side door door support member inwardly by the lower surface of the U-shaped cross section of the operating member presses the ends of the actuation shaft inward hanging root side door The folding member is configured such that when the suspension side door is in an open state, the operation member and the operation shaft are separated from each other, and the door support member is moved outward from the outer periphery of the suspension side door by the biasing force of the spring. Door door twist prevention bracket.

2. The door twist prevention bracket for a folding door according to claim 1, wherein the lower surface of the U-shaped operation member is configured as an inclined surface for pressing the operation shaft downward.

The door twist prevention metal fitting of the folding door according to claim 1 or 2, wherein a tip of the door support member is formed in a wedge shape.