JP3749667B2

JP3749667B2 - Latch lock

Info

Publication number: JP3749667B2
Application number: JP2001017087A
Authority: JP
Inventors: 信久藤井; 知行仙頭
Original assignee: 株式会社淀川製鋼所
Priority date: 2001-01-25
Filing date: 2001-01-25
Publication date: 2006-03-01
Anticipated expiration: 2021-01-25
Also published as: JP2002220956A

Description

【０００１】
【発明の属する技術分野】
本発明は、出入口を開閉する戸本体に設けられるラッチ錠、なかでもラッチ片が揺動してストライカーと係脱する形態のラッチ錠に関する。
【０００２】
【従来の技術】
この種の揺動型のラッチ錠は、例えば実公平５−７４０８号公報に公知である。そこでは、ラッチ片が戸本体の内外方向へ水平に揺動することによって、ストライカーと係合し、あるいは係合状態を解除できるようになっている。因みに、この種のラッチ錠は引戸に適用されることが多い。
【０００３】
【発明が解決しようとする課題】
上記のように、前後揺動する形態のラッチ錠のラッチ片は、戸本体の外面に常に突出するようにばねで移動付勢してある。そのため、戸本体を開放した状態において、ラッチ片が戸本体から大きく突出するのを避けられず、出入口を通り抜ける際に、衣服の一部がラッチ片の突端の爪部に引っ掛かることがある。場合によってはラッチ片が変形して、ストライカーに対して適正に係合できなくなることもある。
【０００４】
また、この種のラッチ片は、ラッチ片とストライカーとが係合した状態における閉止保持力が、ラッチ片の揺動平面に沿う構造になっており、さらに、ラッチ片とストライカーとが係合する鎖錠状態を、ばねの付勢力で維持する構造になっている。そのため、例えば地震などによって、戸本体に開放方向の強い外力が作用すると、ラッチ片に解錠方向のモーメントが作用し、爪部がストライカーから外れて戸本体が開放されてしまう。とくに、ラッチ片の揺動中心と、爪部とストライカーとの係合部とが前後にずれている場合には、戸本体に作用する外力が左程大きくない場合にも、簡単に解錠する欠点がある。
【０００５】
本発明の目的は、ラッチ片が戸本体から大きく突出するのを解消でき、従って、出入口を通り抜ける際に、衣服の一部がラッチ片の突端の爪部に引っ掛かり、あるいはラッチ片が変形するのを解消できるラッチ錠を提供することにある。本発明の他の目的は、戸本体に開放方向の強い外力が作用するような場合にも、ラッチ錠が解錠するのを確実に防止して、地震などの災害時にも戸本体を閉じ状態に保持できるラッチ錠を提供することにある。
【０００６】
【課題を解決するための手段】
本発明のラッチ錠は、ラッチ片２１を含む錠本体３と、ストライカー４と、戸本体２の外面に設けられて、錠本体３のラッチ片２１を解錠操作する錠操作機構とからなる。錠本体３は、錠ボディ１１と、錠ボディ１１で回転可能に軸支されるラッチ軸２０と、ラッチ軸２０と同行回転するラッチ片２１と、ラッチ片２１をストライカー４と係合する向きに揺動付勢するばね２３とを含む。ラッチ片２１は、ストライカー４の爪受部３４と係合する爪部２４と、ばね２３の付勢力に抗してストライカー４で解錠方向に揺動操作されるカム部２５とを備えていて、爪部２４が爪受部３４と係合して戸本体２を閉止保持する鎖錠姿勢と、爪部２４が爪受部３４から離脱する解錠姿勢とに、ラッチ軸２０を中心にして揺動変位できる。爪部２４と爪受部３４とが係合した状態における戸本体の開放を阻止する閉止力Ｒの方向と、ラッチ片２１の揺動平面とは、互いに交差する向きに設定する。しかも、閉止力Ｒの方向とラッチ軸２０の軸中心とはほぼ平行に設定する。
【０００７】
上記のラッチ錠は、引戸と開き戸とのいずれにも適用できるが、引戸に適用する場合には、ラッチ軸２０を、その軸中心が戸本体２の開閉方向に沿ってほぼ水平になるように配置する。ラッチ片２１は、その爪部２４およびカム部２５が、戸本体２の閉じ端側の屋内面から突出する状態で配置して、戸本体２の内外方向へ往復揺動できるようラッチ軸２０で支持する。ストライカー４には、ばね２３に抗してカム部２５を解錠方向へ揺動操作する係合案内面３５を形成する。
【０００８】
錠操作機構が、戸本体２の外面に装着されるカバーケース３７で縦軸３９まわりに揺動可能に支持されるレバー４０と、レバー４０の揺動動作をラッチ軸２０に伝える一対の連動片２２・４１とで構成する。
【０００９】
カム部２５は爪部２４の周縁に沿う３次元平面で形成する。
【００１０】
【発明の作用効果】
本発明のラッチ錠では、ラッチ片２１がラッチ軸２０のまわりに往復揺動してストライカー４と係脱するが、この時のラッチ片２１の爪部２４とストライカー４の爪受部３４とが係合した状態における閉止力Ｒの方向、つまり戸本体２の開放を阻止する力の方向と、ラッチ片２１の揺動平面とを互いに交差する向きに設定したうえで、先の閉止力Ｒの方向とラッチ軸２０の軸中心とをほぼ平行に設定するので、従来のラッチ錠に比べて、戸本体２から突出するラッチ片２１の突出量を小さくできる。例えば、図１に示すように、引戸の側端に錠本体３を設け、ストライカー４を戸枠１に設ける場合には、ラッチ片２１は、ストライカー４の爪受部３４の係合面に沿って内外揺動できればよく、従来のラッチ片のように、ストライカーとの係合部よりもラッチ先端側にカム部を大きく突設する必要がないので、その分だけラッチ片２１の戸本体２からの突出寸法を小さくできる。従って、本発明のラッチ錠によれば、ラッチ片２１が戸本体２から大きく突出するのを解消して、出入口を通り抜ける際に、衣服の一部がラッチ片２１の爪部２４に引っ掛かることをよく防止できる。
【００１１】
ラッチ片２１とストライカー４とが係合した鎖錠状態においては、戸本体２に加わる開放方向の外力は爪受部３４で受け止められるが、先の外力によってラッチ片２１に解錠方向の揺動モーメントが作用することはない。従って、戸本体２に開放方向の強い外力が作用するような場合にも、ラッチ錠が解錠操作されるのを確実に防止でき、これにより、地震などの災害時に戸本体２が開放操作されるのを確実に阻止し、閉じ状態に保持することができる。
【００１２】
ラッチ錠を引戸に適用する場合には、ラッチ片２１が戸本体２の内外方向へ往復揺動できるよう、ラッチ軸２０をその軸中心が戸本体２の開閉方向に沿ってほぼ水平になるように配置する。このように、内外方向へ揺動するラッチ片２１をストライカー４と係合させて、戸本体２を閉じ状態に保持すると、ラッチ片２１の突出量をさらに小さくできるうえ、ラッチ片２１を出入口から離れた戸本体２の屋内面側に突出させることができるので、衣服などの引っ掛かりをよく防止できる。
【００１３】
戸本体２の外面に装着されるカバーケース３７で支持されるレバー４０と、レバー４０の揺動動作をラッチ軸２０に伝える一対の連動片２２・４１とで構成した錠操作機構は、ラッチ錠を内側の錠ユニットと、外側の錠ユニットとに分けて構成できるので、戸本体２に対するラッチ錠の組み付けを簡便に行える。しかも、解錠操作したレバー４０を握ったままで戸本体２を開放操作できる。
【００１４】
ストライカー４とラッチ片２１とは、分離した状態では互いに正対する関係にあり、両者が係合するためには、ストライカー４はラッチ片２１を正対する方向から直交する向きに揺動操作する必要があって、ラッチ片２１を円滑に揺動操作することが難しい。このような、ラッチ片２１の揺動操作を円滑に行うために、カム部２５を爪部２４の周縁に沿う３次元平面で形成して、ラッチ片２１の解錠操作を確実なものとしている。
【００１５】
【実施例】
図１ないし図９は本発明に係るラッチ錠を、物置の引戸に適用した実施例を示す。図２において、符号１は戸枠、２は戸枠の開口面に沿って引き違い開閉される戸本体である。戸本体２と戸枠１との閉じ端には、戸本体２を閉じ状態に保持する錠ユニットを設ける。錠ユニットは、戸本体２に組み付けられる錠本体３と、戸枠１に埋設する状態で固定されるラッチ錠用のストライカー４とで構成する。このストライカー４は、鎌錠用のストライカーを兼ねている。
【００１６】
図３および図４において、錠本体３は、戸本体２の内面側に組まれる内側ユニット３Ａと、戸本体２の外面側に組まれる外側ユニット３Ｂとからなり、内側ユニット３Ａに、仮り錠として用いられる本発明のラッチ錠と、鍵６で鎖錠および解錠操作される鎌錠とが組み込んである。外側ユニット３Ｂには、ラッチ錠を解錠操作する錠操作機構が設けてある。
【００１７】
図４において、内側ユニット３Ａは、逆Ｌ字形のケース１０と、ケース１０の内面上部に固定した錠ボディ１１を有し、ケース１０と錠ボディ１１との間に鎌錠とラッチ錠とが組み付けてある。鎌錠７は、錠ボディ１１に固定されるシリンダー錠１２と、シリンダー錠１２の錠軸の端部に固定される操作カム１３と、操作カム１３で上下操作されるスライド板１４と、スライド板１４で左右方向へ出退揺動操作される鎌形の錠腕１５、および錠腕１５を解錠姿勢と鎖錠姿勢の各切換姿勢において位置保持するキックばね１６などで構成する。図４に想像線で示すように、錠腕１５の先端がストライカー４の内奥裏面壁と係合することにより、戸本体２を開放不能に鎖錠できる。
【００１８】
図５において、錠ボディ１１は左右に長い逆Ω字状のダイキャスト成形品からなり、その左右中央に先のシリンダー錠１２を収容するボス１８を有し、ボス１８の左右に突出する板面の上隅のそれぞれに、一対のブラケット１９が突設してある。このブラケット１９で、ラッチ錠のラッチ軸２０を回転のみ可能に軸支する。ラッチ軸２０はダイキャスト成形品からなり、ラッチ片２１と連動片２２が一体に成形してある。詳しくは、ラッチ軸２０の片方の軸端にラッチ片２１を一体に形成し、他方の軸端寄りに逆Ｌ字状の連動片２２を一体に形成している。連動片２２と錠ボディ１１との間には、ラッチ軸２０を図５に矢印ａで示すように時計回転方向（鎖錠方向）へ回動付勢する、捻りコイル形のばね２３が装着してある。ラッチ片２１は、ブラケット１９の突端外面に突出する、側面視が銀杏葉形の爪部２４を有し、その湾曲周縁に沿って傾斜面からなるカム部２５が形成してある。
【００１９】
錠ボディ１１はケース１０にビスで締結されて、内側ユニット３Ａとしてユニット化されており、図６に示すように、内側ユニット３Ａを戸本体２の側端内面に装着した状態において、ラッチ片２１の大半が取付壁の開口２６を介して屋内側へ突出するように取り付ける。この取付状態において、ラッチ軸２０の軸中心は、戸本体２の開閉方向に沿って左右水平に配置されている。また、戸本体２を開放した状態において、ラッチ片２１のカム部２５の上端は、ラッチ軸２０の中心を通る水平面の付近に位置している。
【００２０】
ラッチ片２１を介して戸本体２を閉じ位置に保持固定するために、戸枠１にストライカー４を設けている。図５において、ストライカー４は、横断面がコ字形のキャッチ本体２８と、キャッチ本体２８に組まれる補強板２９とからなる。キャッチ本体２８の開口縁にはそれぞれフランジ壁３０を張り出し、屋内側のフランジ壁３０に連続する内側面に、ラッチ片２１の進入を許す開口３１を通設する。補強板２９は、基本断面がＬ字形のステンレス板材製のプレス金具からなり、キャッチ本体２８の底壁外面の側から組まれて、先の開口３１の内面周縁を覆う。開口３１に臨む補強板２９の板面を切り起こして窓部３２と舌片３３を設け、この舌片３３の折り曲げ基端を、ラッチ片２１の爪部２４を受け止め係合する爪受部３４とする。爪受部３４に連続して、フランジ壁３０の外面へ向かって傾斜する係合案内部３５が設けてある。係合案内部３５は、戸本体２を閉じ操作するときカム部２５と接当して、ラッチ片２１をばね２３の付勢力に抗して、ラッチ軸２０ごと解錠方向へ揺動操作する。先の舌片３３は、開口３１を介してキャッチ本体２８の外面へ突出する。
【００２１】
図３において、外側ユニット３Ｂは、上下に長いカバーケース３７と、カバーケース３７の前面に組み込まれた錠操作機構とからなる。錠操作機構は、カバーケース３７の前面に凹み形成したポケット３８の上下壁で軸支される縦軸（揺動軸）３９と、一側端が縦軸３９に固定された解錠用のレバー４０と、縦軸３９の上端に一体成形された連動片４１と、縦軸３９を待機姿勢に回動付勢するばね（図示していない）とからなる。先の内側ユニット３Ａと、外側ユニット３Ｂとを、戸本体２の壁を挟んで内外に配置し、両者をビスで締結することにより、錠本体３が戸本体２と一体化される。この組み付け状態において、錠操作機構の連動片４１は、図６に示すようにラッチ軸２０に設けた連動片２２と内外に隣接している。従って、図７に示すように、レバー４０をポケット３８の外面側へ向かって揺動操作すると、その動作が縦軸３９と連動片４１を介してラッチ軸２０に設けた連動片２２へ伝えられ、その結果、ラッチ軸２０が解錠方向へ回動して、ラッチ片２１を解錠姿勢に切り換えることができる。
【００２２】
上記の錠操作機構は戸本体２の外面に設けてあるので、物置内へ入った状態で戸本体２を閉じてしまうと、錠操作機構を操作することができず、閉じ込められてしまう。このような状況でも、ラッチ錠を戸本体２の内側から解錠操作できるようにするために、補助レバー４４を内側ユニット３Ａに設けている。詳しくは、図７に示すように、ケース１０の側端から突出するラッチ軸２０の端部に補助レバー４４を固定している。補助レバー４４は、待機状態において戸本体２の壁面に沿って起立しているので、ラッチ軸２０を中心にして手前側へ傾動操作すると、ラッチ片２１を解錠できる。
【００２３】
次に、ラッチ片２１とストライカー４との係脱動作を説明する。先に説明したように、ラッチ片２１は戸本体２の閉じ端の内面側に突出し、爪部２４の外側面に設けたカム部２５が、ストライカー４の係合案内部３５と正対する関係にある。従って、開放されていた戸本体２閉じ操作すると、図８（ａ）および図９（ａ）に示すように傾斜面で形成したカム部２５の下端側が、傾斜面で形成した係合案内部３５と接当する。因みに、係合案内部３５の傾斜方向が、戸本体２の開閉平面を基準にして屋内側へ傾斜する２次元平面であるのに対し、カム部２５の傾斜面は、爪部２４の周縁に沿って湾曲しながら、爪部２４の周縁へ向かって傾斜する３次元平面で形成してある。そのため、係合案内部３５にカム部２５が接当すると、ラッチ片２１に解錠方向の回転モーメントが作用し、ラッチ片２１およびラッチ軸２０は、図８（ｂ）・（ｃ）および図９（ｂ）に示すようにをばね２３の付勢力に抗して矢印方向へ揺動操作されて、解錠操作される。このときのカム部２５の接当面は、下端側からから上端側へと徐々に変化する。戸本体２を閉じ端の近傍まで閉じ操作し、ラッチ片２１の爪部２４が爪受部３４を通り抜けると、それまで解錠姿勢に保持されていたラッチ片２１およびラッチ軸２０は、図９（ｃ）に示すようにばね２３で鎖錠姿勢へ復帰揺動されるので、爪部２４と爪受部３４とが係合し戸本体２を閉止状態に保持固定できる。
【００２４】
上記のように、爪部２４と爪受部３４とが係合した状態においては、図１に示すように戸本体２の開放を阻止する閉止力Ｒの方向と、ラッチ片２１の揺動平面が互いに直交する関係にあり、しかも、先の閉止力Ｒの方向とラッチ軸２０の軸中心とが平行な関係にある。そのため、戸本体２に開放方向の外力が作用したとしても、この外力は爪部２４と爪受部３４とによって受け止められ、ラッチ片２１に対して、外力に基づく回転モーメントが作用する余地はない。つまり、爪部２４または爪受部３４が破壊しない限りは、ラッチ錠が開錠することはあり得ず、地震などの場合にも、戸本体２を確実に閉止保持して、物置内の収納物が出入口から転落し四散するのを防止できる。
【００２６】
上記以外に、カム部２５の形状や構造は、正対する方向から揺動操作できるものであればよいので、その形状や構造は実施例で説明した形状や構造には限定しない。本発明のラッチ錠は単独で構成することができるので、実施例で説明した錠ユニットのように、鎌錠などの本締り錠を一体に備えている必要はない。上記の実施例では、係合案内部３５をキャッチ本体２８の屋内側の内側面に設けたがその必要はなく、係合案内部３５をキャッチ本体２８の内面上壁に設け、爪受部３４をキャッチ本体２８の内面上壁と直交する内面後壁（または内面前壁）に設けることができる。もちろん、爪受部３４はキャッチ本体２８の内面上下壁のいずれに設けてあってもよい。ラッチ軸２０とラッチ片２１は、別の部品として形成でき、その場合のラッチ軸２０は金属製あるいはプラスチック製の棒やパイプで形成できる。
【図面の簡単な説明】
【図１】鎖錠状態のラッチ錠の横断平面図である。
【図２】物置の斜視図である。
【図３】ラッチ錠の正面図である。
【図４】錠内部の正面図である。
【図５】ラッチ錠の分解斜視図である。
【図６】解錠状態のラッチ錠の横断平面図である。
【図７】錠操作機構を解錠操作した状態の横断平面図である。
【図８】ラッチ錠の解錠動作を示す概略斜視図である。
【図９】ラッチ錠の解錠動作を示す概略側面図である。
【符号の説明】
１戸枠
２戸本体
３錠本体
４ストライカー
１１錠ボディ
２０ラッチ軸
２１ラッチ片
２２連動片
２３ばね
２４爪部
２５カム部
３４爪受部
３５係合案内部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a latch lock provided on a door main body that opens and closes an entrance and exit, and in particular, to a latch lock in which a latch piece swings and disengages from a striker.
[0002]
[Prior art]
This type of swing type latch lock is known, for example, from Japanese Utility Model Publication No. 5-7408. In this case, the latch piece can be engaged with or released from the striker by swinging horizontally in and out of the door body. Incidentally, this type of latch lock is often applied to sliding doors.
[0003]
[Problems to be solved by the invention]
As described above, the latch piece of the latch lock configured to swing back and forth is moved and urged by the spring so as to always protrude from the outer surface of the door body. Therefore, in a state where the door main body is opened, it is unavoidable that the latch piece protrudes greatly from the door main body, and when passing through the doorway, part of the clothes may be caught on the claw portion at the protruding end of the latch piece. In some cases, the latch piece may be deformed and cannot be properly engaged with the striker.
[0004]
Further, this type of latch piece has a structure in which the closing holding force in a state where the latch piece and the striker are engaged follows the swinging plane of the latch piece, and further, the latch piece and the striker engage. The locked state is maintained by the biasing force of the spring. Therefore, when a strong external force in the opening direction is applied to the door body due to, for example, an earthquake, a moment in the unlocking direction is applied to the latch piece, and the claw portion is detached from the striker and the door body is opened. In particular, when the swing center of the latch piece and the engaging portion of the claw portion and the striker are shifted back and forth, even if the external force acting on the door body is not as great as the left, it is easily unlocked. There are drawbacks.
[0005]
The object of the present invention is to eliminate the large protrusion of the latch piece from the door body. Therefore, when passing through the doorway, a part of the clothes is caught on the claw portion of the protruding end of the latch piece, or the latch piece is deformed. An object of the present invention is to provide a latch lock that can solve the problem. Another object of the present invention is to reliably prevent the latch lock from being unlocked even when a strong external force is applied to the door body, and to close the door body even in the event of a disaster such as an earthquake. It is to provide a latch lock that can be held on the door.
[0006]
[Means for Solving the Problems]
The latch lock of the present invention includes a lock body 3 including a latch piece 21, a striker 4, and a lock operation mechanism that is provided on the outer surface of the door body 2 and operates to unlock the latch piece 21 of the lock body 3. The lock body 3 includes a lock body 11, a latch shaft 20 that is rotatably supported by the lock body 11, a latch piece 21 that rotates together with the latch shaft 20, and a direction in which the latch piece 21 is engaged with the striker 4. And a spring 23 for swinging and biasing. The latch piece 21 includes a claw portion 24 that engages with the claw receiving portion 34 of the striker 4, and a cam portion 25 that is swung in the unlocking direction by the striker 4 against the biasing force of the spring 23. The latch shaft 20 is centered on the locking posture in which the claw portion 24 engages with the claw receiving portion 34 and the door body 2 is closed and held, and the unlocking posture in which the claw portion 24 is detached from the claw receiving portion 34. Can swing and displace. The direction of the closing force R that prevents the door body from being opened in a state where the claw portion 24 and the claw receiving portion 34 are engaged with each other and the swing plane of the latch piece 21 are set to intersect each other. Moreover, the direction of the closing force R and the axis center of the latch shaft 20 are set substantially parallel.
[0007]
The latch lock described above can be applied to both sliding doors and hinged doors. However, when applied to a sliding door, the latch shaft 20 is arranged so that the axis center thereof is substantially horizontal along the opening / closing direction of the door body 2. Deploy. The latch piece 21 is arranged with the latch shaft 20 so that the claw portion 24 and the cam portion 25 protrude from the indoor surface on the closed end side of the door main body 2 and can swing back and forth in the inner and outer directions of the door main body 2. To support. The striker 4 is formed with an engagement guide surface 35 that swings the cam portion 25 in the unlocking direction against the spring 23.
[0008]
The lock operating mechanism is supported by a cover case 37 mounted on the outer surface of the door body 2 so as to be swingable around the vertical axis 39, and a pair of interlocking pieces for transmitting the swinging motion of the lever 40 to the latch shaft 20. 22 and 41.
[0009]
The cam portion 25 is formed on a three-dimensional plane along the periphery of the claw portion 24.
[0010]
[Effects of the invention]
In the latch lock of the present invention, the latch piece 21 reciprocally swings around the latch shaft 20 to be engaged with and disengaged from the striker 4. At this time, the claw portion 24 of the latch piece 21 and the claw receiving portion 34 of the striker 4 are connected to each other. The direction of the closing force R in the engaged state, that is, the direction of the force that prevents the door body 2 from being opened, and the swing plane of the latch piece 21 are set to intersect each other, and Since the direction and the axis center of the latch shaft 20 are set substantially parallel to each other, the protruding amount of the latch piece 21 protruding from the door body 2 can be reduced as compared with the conventional latch lock. For example, as shown in FIG. 1, when the lock body 3 is provided at the side end of the sliding door and the striker 4 is provided on the door frame 1, the latch piece 21 is along the engagement surface of the claw receiving portion 34 of the striker 4. It is only necessary to be able to swing inward and outward, and unlike the conventional latch piece, it is not necessary to project a cam portion larger than the engaging portion with the striker on the front end side of the latch. The projecting dimension of can be reduced. Therefore, according to the latch lock of the present invention, the latch piece 21 is prevented from protruding greatly from the door body 2, and a part of the clothes is caught on the claw portion 24 of the latch piece 21 when passing through the doorway. Can prevent well.
[0011]
In the locked state in which the latch piece 21 and the striker 4 are engaged, the external force in the opening direction applied to the door body 2 is received by the claw receiving portion 34, but the latch piece 21 swings in the unlocking direction by the previous external force. Moments do not act. Therefore, even when a strong external force in the opening direction is applied to the door main body 2, it is possible to reliably prevent the latch lock from being unlocked, thereby opening the door main body 2 in the event of a disaster such as an earthquake. Can be reliably prevented and kept closed.
[0012]
When the latch lock is applied to the sliding door, the axis of the latch shaft 20 is substantially horizontal along the opening / closing direction of the door body 2 so that the latch piece 21 can swing back and forth in the door body 2. To place. Thus, when the latch piece 21 swinging inward and outward is engaged with the striker 4 and the door body 2 is held in the closed state, the protruding amount of the latch piece 21 can be further reduced, and the latch piece 21 can be removed from the entrance / exit. Since it can be made to project to the indoor surface side of the separated door body 2, it is possible to prevent clothes and the like from being caught well.
[0013]
A lock operating mechanism comprising a lever 40 supported by a cover case 37 attached to the outer surface of the door body 2 and a pair of interlocking pieces 22 and 41 for transmitting the swinging motion of the lever 40 to the latch shaft 20 is a latch lock. Can be divided into an inner lock unit and an outer lock unit, so that the latch lock can be easily assembled to the door body 2. In addition, the door body 2 can be opened while holding the unlocked lever 40.
[0014]
When the striker 4 and the latch piece 21 are separated from each other, the striker 4 and the latch piece 21 face each other. In order for the striker 4 and the striker 4 to engage with each other, the striker 4 needs to swing in a direction perpendicular to the direction of the latch piece 21. Therefore, it is difficult to swing the latch piece 21 smoothly. In order to smoothly perform such swinging operation of the latch piece 21, the cam portion 25 is formed on a three-dimensional plane along the peripheral edge of the claw portion 24, and the unlocking operation of the latch piece 21 is ensured. .
[0015]
【Example】
FIG. 1 thru | or FIG. 9 shows the Example which applied the latch lock based on this invention to the sliding door of a storeroom. In FIG. 2, reference numeral 1 is a door frame, and 2 is a door body that is opened and closed by sliding along the opening surface of the door frame. A lock unit for holding the door body 2 in a closed state is provided at the closed end of the door body 2 and the door frame 1. The lock unit includes a lock body 3 assembled to the door body 2 and a latch lock striker 4 fixed in a state of being embedded in the door frame 1. The striker 4 also serves as a sickle lock striker.
[0016]
3 and 4, the lock body 3 includes an inner unit 3A assembled on the inner surface side of the door main body 2 and an outer unit 3B assembled on the outer surface side of the door main body 2, and the inner unit 3A is provided with a temporary lock. The latch lock of the present invention used and a sickle lock that is locked and unlocked with the key 6 are incorporated. The outer unit 3B is provided with a lock operating mechanism for unlocking the latch lock.
[0017]
In FIG. 4, the inner unit 3 </ b> A has an inverted L-shaped case 10 and a lock body 11 fixed to the upper part of the inner surface of the case 10, and a sickle lock and a latch lock are assembled between the case 10 and the lock body 11. It is. The sickle lock 7 includes a cylinder lock 12 fixed to the lock body 11, an operation cam 13 fixed to the end of the lock shaft of the cylinder lock 12, a slide plate 14 operated up and down by the operation cam 13, and a slide plate 14, a sickle-shaped lock arm 15 that is moved back and forth in the left-right direction, and a kick spring 16 that holds the lock arm 15 in each switching posture between the unlocked posture and the locked posture. As indicated by an imaginary line in FIG. 4, the door main body 2 can be locked so that it cannot be opened by engaging the tip of the lock arm 15 with the inner back surface wall of the striker 4.
[0018]
In FIG. 5, the lock body 11 is a die-cast molded product having an inverted Ω shape that is long to the left and right, and has a boss 18 that accommodates the previous cylinder lock 12 at the center of the left and right. A pair of brackets 19 project from the upper corners. The bracket 19 supports the latch shaft 20 of the latch lock so that it can only rotate. The latch shaft 20 is made of a die-cast product, and the latch piece 21 and the interlocking piece 22 are integrally formed. Specifically, a latch piece 21 is integrally formed at one shaft end of the latch shaft 20, and an inverted L-shaped interlocking piece 22 is integrally formed near the other shaft end. Between the interlocking piece 22 and the lock body 11, a torsion coil spring 23 is mounted that urges the latch shaft 20 to rotate in the clockwise direction (locking direction) as shown by an arrow a in FIG. 5. It is. The latch piece 21 has a claw portion 24 that protrudes from the outer surface of the protruding end of the bracket 19 and has a ginkgo leaf shape in a side view, and is formed with a cam portion 25 having an inclined surface along the curved peripheral edge thereof.
[0019]
The lock body 11 is fastened to the case 10 with screws and unitized as an inner unit 3A. In the state where the inner unit 3A is mounted on the inner surface of the side end of the door body 2, as shown in FIG. It is attached so that most of it protrudes indoors through the opening 26 of the attachment wall. In this mounted state, the axis center of the latch shaft 20 is horizontally disposed along the opening / closing direction of the door body 2. In the state where the door body 2 is opened, the upper end of the cam portion 25 of the latch piece 21 is located in the vicinity of a horizontal plane passing through the center of the latch shaft 20.
[0020]
In order to hold and fix the door body 2 in the closed position via the latch piece 21, the striker 4 is provided on the door frame 1. In FIG. 5, the striker 4 includes a catch body 28 having a U-shaped cross section and a reinforcing plate 29 assembled to the catch body 28. A flange wall 30 projects from each opening edge of the catch body 28, and an opening 31 that allows the latch piece 21 to enter is provided on an inner surface continuous to the flange wall 30 on the indoor side. The reinforcing plate 29 is made of a stainless steel plate-made press fitting having an L-shaped basic cross section, and is assembled from the bottom wall outer surface side of the catch body 28 to cover the inner peripheral edge of the opening 31. The plate surface of the reinforcing plate 29 facing the opening 31 is cut and raised to provide a window portion 32 and a tongue piece 33, and the claw receiving portion 34 that receives and engages the claw portion 24 of the latch piece 21 with the bent base end of the tongue piece 33. And An engagement guide portion 35 that is inclined toward the outer surface of the flange wall 30 is provided continuously to the claw receiving portion 34. The engagement guide part 35 contacts the cam part 25 when closing the door body 2, and swings the latch piece 21 together with the latch shaft 20 against the urging force of the spring 23 in the unlocking direction. . The tongue piece 33 protrudes to the outer surface of the catch body 28 through the opening 31.
[0021]
In FIG. 3, the outer unit 3 </ b> B includes a cover case 37 that is long in the vertical direction and a lock operation mechanism that is incorporated in the front surface of the cover case 37. The lock operating mechanism includes a vertical axis (oscillation axis) 39 that is pivotally supported by the upper and lower walls of a pocket 38 that is recessed in the front surface of the cover case 37, and an unlocking lever that has one end fixed to the vertical axis 39. 40, an interlocking piece 41 integrally formed at the upper end of the vertical axis 39, and a spring (not shown) that urges the vertical axis 39 to rotate to a standby position. The lock body 3 is integrated with the door body 2 by arranging the inner unit 3A and the outer unit 3B inside and outside the wall of the door body 2 and fastening them with screws. In this assembled state, the interlocking piece 41 of the lock operating mechanism is adjacent to the interlocking piece 22 provided on the latch shaft 20 inside and outside as shown in FIG. Therefore, as shown in FIG. 7, when the lever 40 is swung toward the outer surface side of the pocket 38, the operation is transmitted to the interlocking piece 22 provided on the latch shaft 20 via the vertical axis 39 and the interlocking piece 41. As a result, the latch shaft 20 rotates in the unlocking direction, and the latch piece 21 can be switched to the unlocking posture.
[0022]
Since the above-described lock operation mechanism is provided on the outer surface of the door main body 2, if the door main body 2 is closed in a state of entering the storage, the lock operation mechanism cannot be operated and is locked up. Even in such a situation, the auxiliary lever 44 is provided in the inner unit 3 </ b> A so that the latch can be unlocked from the inside of the door body 2. Specifically, as shown in FIG. 7, the auxiliary lever 44 is fixed to the end of the latch shaft 20 protruding from the side end of the case 10. Since the auxiliary lever 44 stands along the wall surface of the door main body 2 in the standby state, the latch piece 21 can be unlocked by tilting the front side about the latch shaft 20.
[0023]
Next, the engagement / disengagement operation of the latch piece 21 and the striker 4 will be described. As described above, the latch piece 21 protrudes to the inner surface side of the closed end of the door body 2, and the cam portion 25 provided on the outer surface of the claw portion 24 faces the engagement guide portion 35 of the striker 4. is there. Accordingly, when the door main body 2 that has been opened is closed, the lower end side of the cam portion 25 formed with an inclined surface as shown in FIGS. 8A and 9A is engaged with the engaging guide portion 35 formed with the inclined surface. Get in touch with. Incidentally, the inclination direction of the engagement guide part 35 is a two-dimensional plane that inclines indoors with respect to the opening / closing plane of the door main body 2, whereas the inclined surface of the cam part 25 is on the periphery of the claw part 24. It is formed by a three-dimensional plane that is curved toward the peripheral edge of the claw portion 24 while being curved along. Therefore, when the cam portion 25 comes into contact with the engagement guide portion 35, a rotational moment in the unlocking direction acts on the latch piece 21, and the latch piece 21 and the latch shaft 20 are shown in FIGS. As shown in FIG. 9B, the unlocking operation is performed by swinging in the direction of the arrow against the urging force of the spring 23. At this time, the contact surface of the cam portion 25 gradually changes from the lower end side to the upper end side. When the door body 2 is closed to the vicinity of the closed end and the claw portion 24 of the latch piece 21 passes through the claw receiving portion 34, the latch piece 21 and the latch shaft 20 that have been held in the unlocked posture until then are shown in FIG. As shown in (c), the spring 23 is rocked back to the locked position, so that the claw portion 24 and the claw receiving portion 34 are engaged, and the door body 2 can be held and fixed in the closed state.
[0024]
As described above, in the state where the claw portion 24 and the claw receiving portion 34 are engaged, the direction of the closing force R for preventing the door body 2 from being opened and the swing plane of the latch piece 21 as shown in FIG. Are perpendicular to each other, and the direction of the closing force R and the axis center of the latch shaft 20 are parallel to each other. Therefore, even if an external force in the opening direction is applied to the door body 2, the external force is received by the claw portion 24 and the claw receiving portion 34, and there is no room for a rotational moment based on the external force to act on the latch piece 21. . That is, unless the claw portion 24 or the claw receiving portion 34 is broken, the latch lock cannot be unlocked, and the door main body 2 is securely closed and held even in the event of an earthquake, etc. It is possible to prevent objects from falling from the doorway and scattered.
[0026]
In addition to the above, the shape and structure of the cam portion 25 may be any shape as long as it can be swung from the opposite direction, and the shape and structure are not limited to the shapes and structures described in the embodiments. Since the latch lock of this invention can be comprised independently, it is not necessary to equip the main locking locks, such as a sickle lock, integrally with the lock unit demonstrated in the Example. In the above embodiment, the engagement guide portion 35 is provided on the inner side surface of the catch body 28 on the indoor side, but it is not necessary. The engagement guide portion 35 is provided on the upper inner wall of the catch body 28 and the claw receiving portion 34 is provided. Can be provided on the rear inner wall (or front inner wall) orthogonal to the upper inner wall of the catch body 28. Of course, the claw receiving portion 34 may be provided on any of the upper and lower inner walls of the catch body 28 . Latches shaft 20 and the latch piece 21 may be formed as a separate part, the latch shaft 20 in this case may be formed of metal or plastic rods or pipes.
[Brief description of the drawings]
FIG. 1 is a cross-sectional plan view of a latch lock in a locked state.
FIG. 2 is a perspective view of a storage room.
FIG. 3 is a front view of the latch lock.
FIG. 4 is a front view of the inside of the lock.
FIG. 5 is an exploded perspective view of a latch lock.
FIG. 6 is a cross-sectional plan view of the latch lock in the unlocked state.
FIG. 7 is a cross-sectional plan view showing a state where the lock operation mechanism is unlocked.
FIG. 8 is a schematic perspective view showing an unlocking operation of the latch lock.
FIG. 9 is a schematic side view showing the unlocking operation of the latch lock.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Door frame 2 Door main body 3 Lock main body 4 Striker 11 Lock body 20 Latch shaft 21 Latch piece 22 Interlocking piece 23 Spring 24 Claw part 25 Cam part 34 Claw receiving part 35 Engagement guide part

Claims

A lock body (3) assembled to the door body (2) of the sliding door, a striker (4) fixed in an embedded state in the door frame (1), and an outer surface of the door body (2), 3) a latch lock comprising a lock operating mechanism for unlocking operation,
The lock body (3) is pivotally supported by the lock body (11) and the lock body (11) so as to be rotatable only, and the shaft center is arranged substantially horizontally along the opening / closing direction of the door body (2). (20), provided at the shaft end of the latch shaft (20) so as to rotate together with the latch shaft (20), provided at the closed end of the door body (2), and in the thickness direction of the door body (2) A latch piece (21) protruding to the indoor surface side of the door body (2), and a spring (23) for biasing the latch shaft (20) in a direction in which the latch piece (21) engages the striker (4). Including
The striker (4) is provided with a claw receiving part (34) and an engagement guide part (35) formed by an inclined surface continuously to the claw receiving part (34),
The latch piece (21) includes a claw portion (24) received by the claw receiving portion (34) of the striker (4), and a cam portion (25) formed by an inclined surface on the outer surface of the claw portion (24). The locking position in which the claw portion (24) engages with the claw receiving portion (34) and holds the door body (2) closed, and the claw portion (24) is detached from the claw receiving portion (34). It can be rocked and displaced around the latch shaft (20) in the locked position,
Cam portions of the latch piece (21) (25) are in directly opposite relationship engaging guide portion (35) of the striker (4),
When the door body (2) is closed, the cam portion (25) of the latch piece (21) comes into contact with the engagement guide portion (35) of the striker (4), and the latch piece (21) is moved to the spring (23 ) Swing the latch shaft (20) in the unlocking direction against the urging force of
The direction of the closing force (R) that prevents the door body (2) from opening in the state where the claw portion (24) and the claw receiving portion (34) are engaged, and the swing plane of the latch piece (21), The direction of the closing force (R) and the axial center of the latch shaft (20) are set substantially parallel to each other.
A latch lock characterized in that an auxiliary lever (44) for operating the latch piece (21) to an unlocked posture from the inside of the door body (2) is fixed to the latch shaft (20).

A lock operating mechanism is provided at the upper end of the vertical axis (39) and the lever (40) supported swingably around the vertical axis (39) by a cover case (37) mounted on the outer surface of the door body (2). When the lever (40) is swung including the interlocking piece (41) provided and the interlocking piece (22) provided on the latch shaft (20), the vertical axis (39) and both interlocking pieces (41, 22) The latch lock according to claim 1, wherein the latch shaft (20) is rotated in the unlocking direction via the pin and the latch piece (21) can be switched to the unlocking posture.

The latch lock according to claim 1 or 2, wherein the cam portion (25) is formed in a three-dimensional plane along the periphery of the claw portion (24).