JP6318222B1

JP6318222B1 - Latch lock device

Info

Publication number: JP6318222B1
Application number: JP2016220094A
Authority: JP
Inventors: 佐々木　慶; 慶佐々木
Original assignee: Takigen Manufacturing Co Ltd
Current assignee: Takigen Manufacturing Co Ltd
Priority date: 2016-11-11
Filing date: 2016-11-11
Publication date: 2018-04-25
Anticipated expiration: 2036-11-11
Also published as: JP2018076727A

Abstract

【課題】ラッチボルトの半掛り状態が発生し難いと共に、振動等による偶発的な解錠がないキャップ付きのラッチ錠装置を提供する。【解決手段】閉扉状態でラッチボルト７が受け金具に係合し、制御板８の先端が受け金具に当接して後退位置にある場合に、ふた板を閉じることによって、ロックピン５が押し込まれ、ラッチボルト７の凹部１５へ落ち込んでラッチボルト７を錠止位置に拘束する。さらに、ふた板は閉鎖位置で固定枠板に錠止されるので、ロックピン５はロック位置に拘束され、ラッチボルト７が衝撃等で意図せずに後退して扉が開かない構成とした。【選択図】図７Provided is a latch locking device with a cap which is unlikely to cause a half-hanging state of a latch bolt and is free from accidental unlocking due to vibration or the like. When a latch bolt is engaged with a receiving metal fitting in a closed state and the tip of a control plate 8 is in a retracted position in contact with the receiving metal fitting, the lock pin 5 is pushed in by closing the cover plate. Then, it falls into the recess 15 of the latch bolt 7 to restrain the latch bolt 7 in the locking position. Further, since the lid plate is locked to the fixed frame plate in the closed position, the lock pin 5 is constrained to the lock position, and the latch bolt 7 is retracted unintentionally due to impact or the like so that the door does not open. [Selection] Figure 7

Description

本発明は、筐体の固定枠体にヒンジ結合された扉を閉扉状態において固定枠体に錠止するために扉に取り付けられる施錠装置に関する。 The present invention relates to a locking device attached to a door in order to lock a door hinged to a fixed frame body of a housing to the fixed frame body in a closed state.

従来、例えば交通信号機の制御盤が収納されたボックスの扉に使用される錠では、塵埃や雨水の侵入によって錠機構が作動不良を来さないようにするため、鍵孔を被覆するキャップを錠本体の前面部に装備している（例えば、特許文献１参照）。キャップは、錠本体の前面と平行な枢軸によってヒンジ結合された固定翼部と可動翼部とからなる。固定翼部が錠本体に固定される。可動翼部が固定翼部に閉じ合わされたとき、それが錠本体の前面部を被覆する。可動翼部はフック部を具備し、固定翼部はフック部に係脱するキャッチ部を具備する。可動翼部が固定翼部に閉じ合わされて錠本体の前面側を被覆したとき、フック部がキャッチ部に係合する。両者の係合は、鍵を使用して解錠するまで維持される。 Conventionally, for example, a lock used for a door of a box that contains a control panel of a traffic signal, the cap that covers the keyhole is locked in order to prevent malfunction of the lock mechanism due to intrusion of dust or rainwater. It is equipped on the front part of the main body (see, for example, Patent Document 1). The cap includes a fixed wing portion and a movable wing portion that are hinged by a pivot parallel to the front surface of the lock body. The fixed wing is fixed to the lock body. When the movable wing is closed to the fixed wing, it covers the front face of the lock body. The movable wing portion includes a hook portion, and the fixed wing portion includes a catch portion that engages with and disengages from the hook portion. When the movable wing portion is closed to the fixed wing portion and covers the front side of the lock body, the hook portion engages with the catch portion. Both engagements are maintained until unlocked using the key.

特開２００４−２５０８７７号公報JP 2004-250877 A

上記従来の錠装置は、扉に固着され、筐体の固定枠体に固着される受金に対して係合する。すなわち、上記従来の錠装置においては、錠装置を構成するラッチユニットの側面から突出するようにばねで摺動付勢されたラッチボルトが、固定枠体側の受金の丸軸棒に係合することによって扉を枠体に錠止するのが一般的である。ラッチボルトは、丸軸棒に摺接する摺動斜面部と、丸軸棒が係合して当接する平坦面部とを具備する。
一般的に、丸軸棒は、軸周り回転可能になっている。そのため、何らかの原因でラッチボルトの平坦面部が丸軸棒に半掛り状態、つまり本来の平坦面部の先端部でしか引っ掛っていない場合、あるいはラッチボルトが丸軸棒に途中まで押し込まれている場合には、外部振動や固定枠体と扉間のパッキングの反発力等によって丸軸棒が自転し易い。これにより、ラッチボルトと丸棒軸との係合が外れ、扉が意図せずに開放されてしまう危険がある。また、大きな衝撃が加えられると、ラッチボルトがばね力に抗して後退し、これにより扉が開放される危険もある。
したがって、本発明は、ラッチボルトの半掛り状態が発生し難いと共に、振動等による偶発的な解錠がないキャップ付きのラッチ錠装置を提供することを目的としている。 The conventional locking device is fixed to the door and engages with a metal receiver fixed to the fixed frame of the housing. That is, in the conventional locking device described above, the latch bolt that is slidably biased by the spring so as to protrude from the side surface of the latch unit constituting the locking device engages with the round shaft bar of the receiving member on the fixed frame side. In general, the door is locked to the frame body. The latch bolt includes a sliding slope portion that is in sliding contact with the round shaft rod, and a flat surface portion that is engaged with and contacts the round shaft rod.
In general, a round shaft bar is rotatable about an axis. Therefore, when the flat surface part of the latch bolt is half-hanging on the round shaft bar for some reason, that is, when it is only caught at the tip of the original flat surface part, or when the latch bolt is pushed halfway into the round shaft bar The round shaft rod is likely to rotate due to external vibration or the repulsive force of the packing between the fixed frame and the door. Thereby, there is a risk that the latch bolt and the round bar shaft are disengaged and the door is unintentionally opened. In addition, when a large impact is applied, there is a risk that the latch bolt retracts against the spring force, thereby opening the door.
Accordingly, an object of the present invention is to provide a latch locking device with a cap that is unlikely to cause a half-hanging state of a latch bolt and that is free from accidental unlocking due to vibration or the like.

以下、添付図面の符号を参照して説明するが、本発明はこれに限定されるものではない。
上記課題を解決するための、本発明のラッチ錠装置１は、筐体の固定枠体にヒンジ結合された扉を固定枠体に錠止するために扉に取り付けられる施錠装置であって、固定枠体に固定される受け金具４１に対して係合離脱するラッチユニット２と、当該ラッチユニット２に固定され鍵の操作で受け金具４１とラッチユニット２との係合を解除するシリンダ錠３と、当該シリンダ錠３の鍵孔２５を被覆露出する保護キャップ４と、シリンダ錠３を被覆した状態において受け金具４１とラッチユニット２との係合を拘束するロックピン５とを具備する。
ラッチユニット２は、扉の裏面側に固定されるラッチケース６と、当該ラッチケース６内に扉の前面と平行に進退自在に設けられ、受け金具４１に対して係脱するラッチボルト７及び制御板８を具備する。
シリンダ錠３は、ラッチケース６に固着される外筒２４と、鍵によって外筒２４に対して回転できるように前面に鍵孔２５が開口し、後端部においてラッチボルト７を駆動するように当該ラッチボルト７に連結される内筒２６とを具備し、当該内筒２６の前面が扉の前面側に露出するように設けられる。
保護キャップ４は、基端部側において互い開閉自在にヒンジ結合される固定枠板２９及びふた板３０と、当該固定枠板２９とふた板３０とが閉じ合わされた閉鎖状態において両者を拘束しキャップ鍵の解錠操作により両者を解放するするキャップ錠機構３２ａ，３２ｂとを具備し、固定枠板２９が扉の前面側においてシリンダ錠３の外筒２４の前面側に固定され、ふた板３０が閉鎖状態においてシリンダ錠３の前面を被覆するように配置される。
ロックピン５は、シリンダ錠３の外筒２４とラッチケース６を垂直に前後方向に貫通し、ふた板３０が開放状態にあるとき前端部が扉の前面側に突出するアンロック位置と、閉鎖状態にあるふた板３０により前端部がシリンダ錠３内に押し込まれ、後端部がラッチケース６内へ突出するロック位置との間で前後に進退自在であり、アンロック位置に付勢される。
ラッチボルト７は、ラッチケース６から突出して受け金具４１に係合する錠止位置と当該受け金具４１との係合が外れる解錠位置との間を扉の前面と平行に進退自在で、錠止位置に付勢される。ラッチボルト７は、閉扉動作途上で受け金具４１が摺接する摺動斜面１２と、錠止位置においてロックピン５のロック位置への後退を許容し、それによってラッチボルト７を錠止位置に拘束する凹部１５と、錠止位置と解錠位置との中間位置においてロックピン５の後端に対面し、それによってロックピン５のロック位置への後退を阻止する当接面１４とを具備し、閉扉動作途上で摺動斜面１３が受け金具４１に押されて解錠位置へ後退した後、閉扉状態において錠止位置へ突出して受け金具４１に係合するように設けられる。
制御板８は、ラッチボルト７と並んでラッチケース６から突出する突出位置とラッチケース６側へ後退した後退位置との間を進退自在で、突出位置に付勢され、閉扉状態において先端面２３が受け金具４１に当接して後退位置に配置される。制御板８は、閉扉動作途上で受け金具４１に摺接する摺動斜面１９と、突出位置においてロックピン５の後端に対面することによって、そのロック位置への後退を阻止する当接面２１と、後退位置においてロックピンのロック位置への後退を許容する凹部２２とを具備し、閉扉動作途上で摺動斜面１９が受け金具４１に押されて後退位置へ後退するように設けられる。 Hereinafter, the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto.
In order to solve the above problems, a latch locking device 1 of the present invention is a locking device that is attached to a door in order to lock the door hinged to the fixed frame body of the housing to the fixed frame body, a latch unit 2 which engages withdrawal against the receiving metal 41 fixed to the frame, the cylinder lock to release the engagement between the receiving metal 41 and the latch unit 2 by operating the key is secured to the latches unit 2 3, a protective cap 4 that covers and exposes the key hole 25 of the cylinder lock 3, and a lock pin 5 that restrains engagement of the receiving metal fitting 41 and the latch unit 2 in a state where the cylinder lock 3 is covered.
The latch unit 2 includes a latch case 6 that is fixed to the back side of the door, a latch bolt 7 that is provided in the latch case 6 so as to be able to advance and retract in parallel with the front surface of the door, and is engaged with and disengaged from the receiving metal fitting 41. A plate 8 is provided.
The cylinder lock 3 has an outer cylinder 24 fixed to the latch case 6 and a key hole 25 opened on the front surface so that the key can be rotated with respect to the outer cylinder 24 by a key, and the latch bolt 7 is driven at the rear end. And an inner cylinder 26 connected to the latch bolt 7, and the front surface of the inner cylinder 26 is provided so as to be exposed to the front surface side of the door.
The protective cap 4 is a cap that restrains both the fixed frame plate 29 and the lid plate 30 that are hinged to be openable and closable on the base end side, and the fixed frame plate 29 and the lid plate 30 in a closed state. Cap locking mechanisms 32a and 32b for releasing both of them by the unlocking operation of the key are provided, the fixed frame plate 29 is fixed to the front side of the outer cylinder 24 of the cylinder lock 3 on the front side of the door, and the lid plate 30 is It arrange | positions so that the front surface of the cylinder lock 3 may be coat | covered in a closed state.
The lock pin 5 vertically passes through the outer cylinder 24 and the latch case 6 of the cylinder lock 3 in the front-rear direction, and when the lid plate 30 is in an open state, the unlocking position in which the front end projects to the front side of the door, The front end portion is pushed into the cylinder lock 3 by the lid plate 30 in the state, and the rear end portion can be moved back and forth between the lock position protruding into the latch case 6 and biased to the unlock position. .
The latch bolt 7 can move forward and backward in parallel with the front surface of the door between a locking position that protrudes from the latch case 6 and engages with the receiving bracket 41 and an unlocking position that disengages the receiving bracket 41. It is biased to the stop position. The latch bolt 7 permits the sliding slope 12 with which the metal fitting 41 is slidably contacted during the door closing operation, and allows the lock pin 5 to retreat to the lock position at the lock position, thereby constraining the latch bolt 7 to the lock position. A recess 15 and a contact surface 14 that faces the rear end of the lock pin 5 at an intermediate position between the lock position and the unlock position, thereby preventing the lock pin 5 from moving back to the lock position, and closing the door. In the course of operation, the sliding inclined surface 13 is pushed by the receiving metal fitting 41 and retracted to the unlocking position, and then protrudes to the locking position and engages with the receiving metal fitting 41 in the closed state.
The control plate 8 can move forward and backward between a protruding position protruding from the latch case 6 along with the latch bolt 7 and a retracted position retracted toward the latch case 6, and is urged to the protruding position. Is placed in the retracted position in contact with the receiving metal fitting 41. The control plate 8 includes a sliding slope 19 that comes into sliding contact with the metal fitting 41 during the closing operation, and a contact surface 21 that prevents the lock pin 5 from retreating to the locking position by facing the rear end of the locking pin 5 at the protruding position. And a recess 22 that allows the lock pin to retract to the lock position in the retracted position, and is provided so that the sliding slope 19 is pushed by the receiving metal fitting 41 and retracts to the retracted position during the closing operation.

本発明のラッチ錠装置１においては、完全な閉扉状態においてラッチボルト７が受け金具４１に係合し、かつ制御板８の先端が受け金具４１に当接して後退位置にあるから、保護キャップ４のふた板３０を閉じれば、ロックピン５がシリンダ錠３内に押し込まれ、後端部がラッチボルト７及び制御板８の凹部１５，２２へ落ち込んでラッチボルト７を錠止位置に拘束する。ふた板３０は、閉鎖位置で固定枠板２９に錠止されるから、ロックピン５は、ロック位置に拘束される。したがって、ラッチボルト７が衝撃等により意図せずに後退して扉が開くことはない。シリンダ錠３と保護キャップ４により、扉は二重に施錠されることになる。一方、制御板８が受け金具４１により後退位置へ押し込まれた状態、すなわちラッチボルト７が受け金具４１に係合した状態にないときには、制御板８が突出位置にあって、ロックピン５が当接面２１に対面してアンロック位置に拘束され、シリンダ錠３から前方へ突出しているから、ふた板３０を閉じることができない。また、ラッチボルト７が受け金具４１に不完全に係合した半掛り状態では、ラッチボルト７が錠止位置に完全に突出していないので、ロックピン５が当接面１４に当接して押し込めない。このため、ふた板３０の状態により扉の確実な施錠を確認することができる。 In the latch lock device 1 of the present invention, the latch bolt 7 is engaged with the receiving metal fitting 41 in the completely closed state, and the front end of the control plate 8 is in contact with the receiving metal fitting 41 and is in the retracted position. When the lid plate 30 is closed, the lock pin 5 is pushed into the cylinder lock 3 and the rear end portion falls into the latch bolt 7 and the recesses 15 and 22 of the control plate 8 to restrain the latch bolt 7 in the locked position. Since the lid plate 30 is locked to the fixed frame plate 29 in the closed position, the lock pin 5 is restrained to the lock position. Therefore, the latch bolt 7 does not retreat unintentionally due to impact or the like, and the door does not open. The door is double-locked by the cylinder lock 3 and the protective cap 4. On the other hand, when the control plate 8 is pushed into the retracted position by the receiving bracket 41, that is, when the latch bolt 7 is not engaged with the receiving bracket 41, the control plate 8 is in the protruding position and the lock pin 5 is in contact. Since it faces the contact surface 21 and is restrained to the unlock position and protrudes forward from the cylinder lock 3, the lid plate 30 cannot be closed. Further, in a half-hanging state in which the latch bolt 7 is incompletely engaged with the receiving metal fitting 41, the latch bolt 7 does not completely protrude to the locking position, so that the lock pin 5 contacts the contact surface 14 and cannot be pushed in. . For this reason, reliable locking of the door can be confirmed by the state of the cover plate 30.

本発明に係るラッチ錠装置の正面図であり、（Ａ）は保護キャップを閉じた施錠状態、（Ｂ）は保護キャップを開いた解錠状態を示す。It is a front view of the latch locking device which concerns on this invention, (A) shows the locked state which closed the protective cap, (B) shows the unlocked state which opened the protective cap. 図１のラッチ錠装置の側面図であり、（Ａ）は保護キャップを閉じた施錠状態、（Ｂ）は保護キャップを開いた解錠状態を示す。It is a side view of the latch lock apparatus of FIG. 1, (A) shows the locked state which closed the protective cap, (B) shows the unlocked state which opened the protective cap. 図１のラッチ錠装置におけるラッチユニットの内部を示す正面図であり、（Ａ）は保護キャップを閉じた施錠状態、（Ｂ）は保護キャップを開いた解錠状態を示す。It is a front view which shows the inside of the latch unit in the latch lock apparatus of FIG. 1, (A) shows the locked state which closed the protective cap, (B) shows the unlocked state which opened the protective cap. 図１のラッチ錠装置のロックピン周辺の断面図であり、（Ａ）は図１（Ａ）におけるＩＶａ−ＩＶａに沿う一部の断面図、（Ｂ）は図１（Ｂ）におけるＩＶｂ−ＩＶｂに沿う一部の断面図である。It is sectional drawing of the lock pin periphery of the latch lock apparatus of FIG. 1, (A) is a fragmentary sectional view in alignment with IVa-IVa in FIG. 1 (A), (B) is IVb-IVb in FIG. 1 (B). FIG. 図１のラッチ錠装置のロックピン周辺の断面図であり、（Ａ）は図１（Ａ）におけるＶａ−Ｖａに沿う一部の断面図、（Ｂ）は図１（Ｂ）におけるＶｂ−Ｖｂに沿う一部の断面図である。It is sectional drawing of the lock pin periphery of the latch lock apparatus of FIG. 1, (A) is partial sectional drawing in alignment with Va-Va in FIG. 1 (A), (B) is Vb-Vb in FIG. 1 (B). FIG. 図１のラッチ錠装置おけるラッチユニットの内部を示す正面図であり、（Ａ）は閉扉動作の途上、（Ｂ）は解錠時を示す。It is a front view which shows the inside of the latch unit in the latch lock apparatus of FIG. 1, (A) is in the middle of door closing operation | movement, (B) shows the time of unlocking. 図１のラッチ錠装置の構成の一部を示す分解斜視図である。It is a disassembled perspective view which shows a part of structure of the latch lock apparatus of FIG.

図面を参照して本発明の実施の形態を説明する。
図１、図２において、ラッチ錠装置１は、図示しない筐体の固定枠体にヒンジ結合された扉を固定枠体に錠止するために扉に取り付けられる施錠装置であって、ラッチユニット２と、シリンダ錠３と、保護キャップ４と、ロックピン５とを具備する。 Embodiments of the present invention will be described with reference to the drawings.
1 and 2, a latch locking device 1 is a locking device that is attached to a door to lock a door hinged to a fixed frame body of a housing (not shown) to the fixed frame body. A cylinder lock 3, a protective cap 4, and a lock pin 5.

ラッチユニット２は、扉の裏面側に固定され、閉扉により自動的に固定枠体側の受け金具４１に係合して施錠され、図示しない鍵によってシリンダ錠３を解錠操作することにより、受け金具４１に対して離脱し、開扉を可能とする。 The latch unit 2 is fixed to the back surface side of the door, and is automatically locked by being locked with the receiving metal fitting 41 on the side of the fixed frame body when the door is closed, and the cylinder lock 3 is unlocked with a key (not shown). It separates from 41 and allows the door to be opened.

図２、図３に示すように、ラッチユニット２は、ラッチケース６と、当該ラッチケース６内に設けられるラッチボルト７と制御板８とを具備する。 As shown in FIGS. 2 and 3, the latch unit 2 includes a latch case 6, a latch bolt 7 and a control plate 8 provided in the latch case 6.

図４に示すように、ラッチケース６は、前方に開放する矩形箱状のケース本体９と、その開口を閉じるようにケース本体９に固定される前面板１０とを具備する。前面板１０が、扉の前面と平行に扉に固定される。 As shown in FIG. 4, the latch case 6 includes a rectangular box-shaped case body 9 that opens forward, and a front plate 10 that is fixed to the case body 9 so as to close the opening. The front plate 10 is fixed to the door in parallel with the front surface of the door.

ラッチボルト７は、ラッチケース６内に設けられ、ラッチケース６の開口から突出して受け金具４１に係合する錠止位置（図１ないし図５の(Ａ）)と、ラッチケース６内へ退避して受け金具４１との係合が外れる解錠位置（図６（Ｂ））との間を扉の前面と平行に進退自在で、ばね１１により、錠止位置に付勢される。 The latch bolt 7 is provided in the latch case 6, protrudes from the opening of the latch case 6 and engages with the receiving metal fitting 41 (FIG. 1A to FIG. 5A), and retracts into the latch case 6. Then, it can move forward and backward in parallel with the front surface of the door between the unlocked position (FIG. 6B) where the engagement with the receiving metal fitting 41 is disengaged, and is biased to the locked position by the spring 11.

図５、図６に示すように、ラッチボルト７は、受け金具４１が摺動する摺動斜面１２と、受け金具４１が係合する係合平面１３と、ロックピン５が当接する当接面１４（図６）と、ロックピン５が落ち込む凹部１５（図６）と、シリンダ錠３が係合するカム溝１６（図６）とを具備する。 As shown in FIGS. 5 and 6, the latch bolt 7 includes a sliding slope 12 on which the receiving bracket 41 slides, an engagement plane 13 on which the receiving bracket 41 engages, and a contact surface on which the lock pin 5 contacts. 14 (FIG. 6), a recess 15 (FIG. 6) into which the lock pin 5 falls, and a cam groove 16 (FIG. 6) with which the cylinder lock 3 is engaged.

閉扉動作の途上で受け金具４１が摺動斜面１２の基端側から先端側へと摺接することにより、ラッチボルト７を解錠位置へ後退させ（図６（Ａ））、閉扉位置において受け金具４１が摺動斜面１２の先端を通過すると、ばね１１により、ラッチボルト７が錠止位置へ突出し（図１ないし図５の(Ａ）)、自動的に受け金具４１が係合平面１３に係合する。 In the course of the closing operation, the receiving bracket 41 is in sliding contact with the sliding slope 12 from the proximal end side to the distal end side, thereby retracting the latch bolt 7 to the unlocked position (FIG. 6A). When 41 passes the tip of the sliding slope 12, the latch 11 protrudes to the locking position by the spring 11 (FIG. 1 to FIG. 5A), and the catch 41 is automatically engaged with the engagement plane 13. Match.

図６、図７に示すように、ラッチボルト７の進退方向に沿う一方の縁部に、係合平面１３に連続して基端側へ延びる突条１７が設けられ、それの端部に、係合平面１３に連続する当接面１４と、これに対して垂直に後方へ落ちる凹部１５が設けられる。 As shown in FIGS. 6 and 7, a ridge 17 is provided on one edge along the advancing / retreating direction of the latch bolt 7 so as to extend to the base end side continuously to the engagement plane 13. A contact surface 14 that is continuous with the engagement plane 13 and a recess 15 that falls rearward perpendicularly thereto are provided.

図６に示すように、制御板８は、ラッチボルト７の進退方向に沿う一方の側面に沿うようにラッチボルト７と並んで、これと同方向に進退自在にケース６内に支持される。制御板８は、錠止位置にあるラッチボルト７と並んでラッチケース６から突出する突出位置（図１ないし図５の(Ｂ）)と、受け金具４１に押されてラッチケース１６内へ後退した後退位置（図１ないし図５の(Ａ）)との間を扉の前面と平行に進退自在であり、ばね１８により、突出位置に付勢される。制御板８は、摺動斜面１９と、先端突起２０と、当接面２１と、凹部２２とを具備する。制御板８は、隣接するラッチボルト７の側面と概略同形状で、摺動斜面１９は、突出位置において、錠止位置にあるラッチボルト７の摺動斜面１２と面一となり（図５（Ｂ））、当接面２１は当接面１４と面一である。図４，５に示すように、先端突起２０は、制御板８の先端部において、ラッチボルト７の係合平面１３より高く前方へ起立しており、摺動斜面１９に連続して前方へ垂直に起立する先端面２３を具備する。 As shown in FIG. 6, the control plate 8 is supported in the case 6 along the latch bolt 7 along one side surface along the forward / backward direction of the latch bolt 7 and capable of moving forward / backward in the same direction. The control plate 8 is pushed into the latch case 16 by being pushed by the receiving metal 41 and the projecting position (FIG. 1 to FIG. 5 (B)) that projects from the latch case 6 along with the latch bolt 7 in the locking position. It can be moved back and forth between the retracted position (FIG. 1 to FIG. 5A) in parallel with the front surface of the door, and is urged by the spring 18 to the protruding position. The control plate 8 includes a sliding slope 19, a tip projection 20, a contact surface 21, and a recess 22. The control plate 8 has substantially the same shape as the side surface of the adjacent latch bolt 7, and the sliding slope 19 is flush with the sliding slope 12 of the latch bolt 7 in the locking position at the protruding position (FIG. 5B )), The contact surface 21 is flush with the contact surface 14. As shown in FIGS. 4 and 5, the tip protrusion 20 stands at the front end of the control plate 8 higher than the engagement plane 13 of the latch bolt 7, and continues vertically to the sliding slope 19. The front end surface 23 stands up.

制御板８は、閉扉動作の途上で受け金具４１が摺動斜面１９の基端側から先端側へと摺接することにより、ラッチボルト７と一体に後退位置（図６（Ａ））へ押し込まれるが、受け金具４１が摺動斜面１９を通過した後も、先端面２３が受け金具４１に当接するので、後退位置に保持され、したがって、ラッチボルト７のみが錠止位置へ突出して受け金具４１に係合する（図１ないし図５の(Ａ）)。 The control plate 8 is pushed into the retracted position (FIG. 6 (A)) together with the latch bolt 7 when the receiving metal fitting 41 is in sliding contact from the proximal end side to the distal end side of the sliding slope 19 during the door closing operation. However, even after the receiving metal fitting 41 has passed through the sliding slope 19, the front end surface 23 abuts on the receiving metal fitting 41, so that it is held in the retracted position. Therefore, only the latch bolt 7 protrudes to the locking position and the receiving metal fitting 41. (A in FIG. 1 to FIG. 5).

図５に示すように、シリンダ錠３は、後端においてラッチケース６の前面板１０に固着される外筒２４と、図示しない鍵による操作で外筒２４に対して解錠方向へ回転できる内筒２６とを具備する。図１(Ｂ)に示すように、シリンダ錠３は、内筒２６の前面の鍵孔２５が、扉の前面側に露出するように扉に固定される。内筒２６は、後端部において前面板１０を自在に貫通し、ラッチケース６内においてラッチボルト７のカム溝１６に係合してこれを駆動するカム２７（図３，５，６）を具備する。 As shown in FIG. 5, the cylinder lock 3 includes an outer cylinder 24 that is fixed to the front plate 10 of the latch case 6 at the rear end, and an inner cylinder that can be rotated in the unlocking direction with respect to the outer cylinder 24 by operation with a key (not shown). And a tube 26. As shown in FIG. 1 (B), the cylinder lock 3 is fixed to the door such that the key hole 25 on the front surface of the inner cylinder 26 is exposed on the front surface side of the door. The inner cylinder 26 freely penetrates the front plate 10 at the rear end, and engages with the cam groove 16 of the latch bolt 7 in the latch case 6 to drive the cam 27 (FIGS. 3, 5, and 6). It has.

図１、図２に示すように、保護キャップ４は、扉の前面と平行な枢軸２８により、基端部側において互い開閉自在にヒンジ結合される固定枠板２９とふた板３０とを具備する。固定枠板２９は、開口３１からシリンダ錠３の内筒２６の前面を前方へ露出させて、外筒２４の前面側に固定される。固定枠板２９とふた板３０は、互いに閉じ合わされた閉鎖状態において自動的に錠止されるキャップ錠機構３２ａ，３２ｂを先端側に具備する。錠止されたキャップ錠機構３２ａ，３２ｂは、図示しないキャップ鍵による解錠操作により解錠される。固定枠板２９は、扉の前面側においてシリンダ錠３の外筒２４の前面に固定される。図１、図２の(Ａ)に示すように、ふた板３０は、閉鎖状態においてシリンダ錠３の鍵孔２５を被覆するように配置される。 As shown in FIGS. 1 and 2, the protective cap 4 includes a fixed frame plate 29 and a lid plate 30 that are hingedly connected to each other on the base end side by a pivot 28 parallel to the front surface of the door. . The fixed frame plate 29 is fixed to the front surface side of the outer cylinder 24 by exposing the front surface of the inner cylinder 26 of the cylinder lock 3 forward from the opening 31. The fixed frame plate 29 and the lid plate 30 are provided with cap locking mechanisms 32a and 32b on the distal end side that are automatically locked in a closed state where they are closed together. The locked cap locking mechanisms 32a and 32b are unlocked by an unlocking operation using a cap key (not shown). The fixed frame plate 29 is fixed to the front surface of the outer cylinder 24 of the cylinder lock 3 on the front surface side of the door. As shown in FIGS. 1 and 2A, the lid plate 30 is disposed so as to cover the key hole 25 of the cylinder lock 3 in the closed state.

図４に示すように、ロックピン５は、シリンダ錠３の外筒２４とラッチケース６の前面板１０を垂直に前後方向に貫通し、ロック位置（図４（Ａ））とアンロック位置（図４（Ｂ））との間を前後方向に進退自在に設けられる。ロックピン５は、ふた板３０が開いた状態にあるとき、ばね３３に付勢されて、前端部が扉の前面側に突出したアンロック位置にあり、ふた板３０が閉じた状態にあるとき、前端部がふた板３０に押されてシリンダ錠３内に押し込まれたロック位置にある。図３に示すように、ロックピン５の後端は、ラッチボルト７と制御板８との境界部に対面しており、ロックピン５の後退は、ラッチボルト７と制御板８の当接面１４，２１の位置により制限される。 As shown in FIG. 4, the lock pin 5 vertically penetrates the outer cylinder 24 of the cylinder lock 3 and the front plate 10 of the latch case 6 in the front-rear direction, so that the lock position (FIG. 4A) and the unlock position ( 4 (B)) is provided so as to freely advance and retract in the front-rear direction. When the cover plate 30 is in the open state, the lock pin 5 is biased by the spring 33, and the front end is in the unlocked position protruding to the front side of the door, and the cover plate 30 is in the closed state. The front end portion is in a locked position where it is pushed into the cylinder lock 3 by being pushed by the lid plate 30. As shown in FIG. 3, the rear end of the lock pin 5 faces the boundary between the latch bolt 7 and the control plate 8, and the backward movement of the lock pin 5 is the contact surface between the latch bolt 7 and the control plate 8. Limited by positions 14,21.

ラッチボルト７の凹部１５と制御板８の凹部２２との位置関係は、以下のように設定される。すなわち、図１ないし図５の(Ａ）に示すように、ラッチボルト７が錠止位置へ突出し、かつ制御板８が後退位置に保持された状態で、ラッチボルト７の凹部１５と制御板８の凹部２２とが合致し、それにより、ロックピン５の後退が許容される。また図３（Ｂ）に示すように、制御板８が突出位置にあるときには、凹部２２とロックピン５とが合致せず、したがって、ロックピン５の後退が阻止される。 The positional relationship between the recess 15 of the latch bolt 7 and the recess 22 of the control plate 8 is set as follows. That is, as shown in FIG. 1 to FIG. 5A, in a state where the latch bolt 7 protrudes to the locking position and the control plate 8 is held in the retracted position, the recess 15 of the latch bolt 7 and the control plate 8 , And the recess 22 of the lock pin 5 is allowed to retreat. As shown in FIG. 3B, when the control plate 8 is in the protruding position, the recess 22 and the lock pin 5 do not match, and therefore the lock pin 5 is prevented from moving backward.

以上のように構成されたラッチ錠装置１は、開扉状態において、ラッチボルト７と制御板８とが共にケース６から突出した位置にあり、ロックピン５は前方へ突出し、ふた板３０が開いている（図１ないし図５の(Ｂ）)。この状態で、ロックピン５の後端は制御板８の当接面２１に対面して後退できないから、ふた板３０を閉じることができない。 In the latch lock device 1 configured as described above, when the door is open, both the latch bolt 7 and the control plate 8 are in a position protruding from the case 6, the lock pin 5 protrudes forward, and the lid plate 30 is opened. ((B) in FIGS. 1 to 5). In this state, the rear end of the lock pin 5 faces the abutment surface 21 of the control plate 8 and cannot be retracted, so the lid plate 30 cannot be closed.

ここから、扉を閉じるとき、その途上で、筐体側の受け金具４１に摺動斜面１２，１９が押されてラッチボルト７と制御板８が一体にラッチケース６９内へ押し込まれる（図６(Ａ）)。ラッチボルト７は、その先端が受け金具４１を通過すると、付勢力により自動的に錠止位置へ突出し、係合平面１３が受け金具４１に係合して施錠される（図１ないし図５の(Ａ）)。この状態で、制御板８は、その先端面２３が受け金具４１に当接して後退位置に保持され、凹部２２がロックピン５の後端と合致するから、ロックピン５を押し込みながら、ふた板３０を閉じることができる。ふた板３０を閉じると、固定枠板２９との間でキャップ錠機構３２ａ，３２ｂが自動的に施錠される。 From this point, when the door is closed, the sliding slopes 12 and 19 are pushed by the receiving metal fitting 41 on the housing side, and the latch bolt 7 and the control plate 8 are pushed together into the latch case 69 (FIG. 6 ( A)). When the tip of the latch bolt 7 passes through the receiving metal fitting 41, the latch bolt 7 automatically protrudes to the locking position by the urging force, and the engaging flat surface 13 is engaged with the receiving metal fitting 41 and locked (see FIGS. 1 to 5). (A)). In this state, the front end surface 23 of the control plate 8 abuts against the receiving metal fitting 41 and is held in the retracted position, and the recess 22 matches the rear end of the lock pin 5. 30 can be closed. When the lid plate 30 is closed, the cap locking mechanisms 32a and 32b are automatically locked with the fixed frame plate 29.

何らかの原因で、扉の閉まりが不完全で、ラッチボルト７が受け金具４１対して半掛かり状態であると、ラッチボルト７が後退途上あるいは突出途上にあるから、ロックピン５の後端がラッチボルト７の当接面１４に対面しており、ふた板３０を閉じることができない。したがって、ふた板３０の状態により、扉が完全に閉じられ、施錠されているか否かを目視により容易に確認することができる。 If for some reason the door is not fully closed and the latch bolt 7 is half-hanging with respect to the receiving metal 41, the latch bolt 7 is in the process of retreating or projecting, so the rear end of the lock pin 5 is the latch bolt. 7 faces the abutting surface 14 and the lid plate 30 cannot be closed. Therefore, whether or not the door is completely closed and locked depending on the state of the lid plate 30 can be easily confirmed by visual observation.

また、扉が閉じられ、ふた板３０も閉じられた状態（図１ないし図５の(Ａ）)で、ロックピン５がラッチボルト７と制御板８の凹部１５，２２にそれぞれ落ち込むことにより、ラッチボルト７と制御板８の後退が阻止されるので、大きな振動や衝撃が加えられても、施錠が解除されることはない。 Further, when the door is closed and the lid plate 30 is also closed ((A) in FIGS. 1 to 5), the lock pin 5 falls into the latch bolt 7 and the recesses 15 and 22 of the control plate 8, respectively. Since the latch bolt 7 and the control plate 8 are prevented from retreating, the locking is not released even if a large vibration or impact is applied.

扉を開くには、鍵をシリンダ錠３に差して内筒２６を図１において右方の解錠方向へ回転させると、図６（Ｂ）に示すように、カム２７を介してラッチボルト７がラッチケース６内へ引き込まれ、受け金具４１から外れるので、そのまま鍵と共に扉を引けばよい。開扉後、シリンダ錠３は，ラッチボルト７と共に、施錠位置に戻り、図１ないし図３の（Ｂ）の状態に戻る。 In order to open the door, the key is inserted into the cylinder lock 3 and the inner cylinder 26 is rotated in the unlocking direction to the right in FIG. 1. As shown in FIG. Is pulled into the latch case 6 and disengaged from the metal fitting 41, and the door can be pulled with the key as it is. After the door is opened, the cylinder lock 3 returns to the locked position together with the latch bolt 7 and returns to the state shown in FIG.

１ラッチ錠装置
２ラッチユニット
３シリンダ錠
４保護キャップ
５ロックピン
６ラッチケース
７ラッチボルト
８制御板
９ケース本体
１０前面板
１１ばね
１２摺動斜面
１３係合平面
１４当接面
１５凹部
１６カム溝
１７突条ばね
１８ばね
１９摺動斜面
２０先端突起
２１当接面
２２凹部
２３先端面
２４外筒
２５鍵孔
２６内筒
２７カム
２８枢軸
２９固定枠板
３０ふた板
３１開口
３２ａ，ｂキャップ錠機構
３３ばね
４１受け金具 DESCRIPTION OF SYMBOLS 1 Latch lock device 2 Latch unit 3 Cylinder lock 4 Protective cap 5 Lock pin 6 Latch case 7 Latch bolt 8 Control board 9 Case main body 10 Front plate 11 Spring 12 Sliding slope 13 Engagement plane 14 Contact surface 15 Recess 16 Cam groove 17 ridge spring 18 spring 19 sliding slope 20 tip projection 21 abutment surface 22 recess 23 tip end surface 24 outer cylinder 25 key hole 26 inner cylinder 27 cam 28 pivot 29 fixed frame plate 30 lid plate 31 openings 32a, b cap locking mechanism 33 Spring 41 Bracket

Claims

A locking device attached to the door to lock the door hinged to the fixed frame of the housing to the fixed frame,
A latch unit for engaging disengaged against receiving metal fixed to the stationary frame member, a cylinder lock to release the engagement of the receiving and fitting said latch unit by the operation of which is fixed to the latches unit key A protective cap that covers and exposes the keyhole of the cylinder lock, and a lock pin that restrains the engagement between the metal fitting and the latch unit in the covered state of the cylinder lock,
The latch unit includes a latch case fixed to the back side of the door, a latch bolt and a control plate provided in the latch case so as to be movable forward and backward in parallel with the front surface of the door, Comprising
The cylinder lock is rotated by inserting a key into an outer cylinder fixed to the latch case and a key hole opened on the front surface, and is connected to the latch bolt so as to drive the latch bolt at a rear end portion. An inner cylinder, the front surface of the inner cylinder is exposed on the front side of the door,
The protective cap includes a fixed frame plate and a lid plate that are hinged to be openable and closable on the base end side, and the cap frame is unlocked in a closed state in which the fixed frame plate and the cover plate are closed. A cap lock mechanism that releases both of them by operation, the fixed frame plate is fixed to the front surface side of the outer cylinder of the cylinder lock on the front surface side of the door, and the front surface of the cylinder lock is closed when the lid plate is closed. Arranged to cover
The lock pin penetrates the outer cylinder of the cylinder lock and the latch case in the front-rear direction perpendicular to the front surface of the door, and the front end portion protrudes to the front side of the door when the cover plate is open. The unlocked position is freely movable back and forth between the unlocked position and the locked position where the front end is pushed into the outer cylinder and the rear end protrudes into the latch case by the lid plate in the closed state. Energized by
The latch bolt is movable forward and backward between a locking position that protrudes from the latch case and engages the receiving bracket and an unlocking position that disengages the receiving bracket, and is biased to the locking position. A sliding slope on which the metal fitting comes into sliding contact during the closing operation, a recess for restraining the latch bolt to the locking position by allowing the locking pin to move back to the locking position at the locking position, and a locking position. A contact surface that prevents the lock pin from moving backward to the lock position at an intermediate position with respect to the lock position, and the sliding slope is pushed back by the metal fitting during the door closing operation and then retracted to the unlock position. , Provided to engage the receiving bracket by protruding to the locking position in the closed state,
The control plate can be moved back and forth between a protruding position protruding from the latch case along with the latch bolt and a retracted position retracted toward the latch case, and is urged to the protruding position, and the front end surface is closed in the closed state. A sliding inclined surface that is in contact with the receiving metal fitting and is disposed at the retracted position and that slides on the receiving metal fitting during the door closing operation, and a rearward end of the lock pin at the protruding position, thereby retreating to the locking position. A contact surface for blocking and a recess allowing the lock pin to move back to the locked position at the retracted position, so that the sliding inclined surface is pushed by the receiving metal during the door closing operation and retracts to the retracted position. A latch lock device, characterized in that it is provided.