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(11) | EP 0 732 472 B1 |
| (12) | EUROPEAN PATENT SPECIFICATION |
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| (54) |
Improved device for locking bolts in a safety door Einrichtung zum Blockieren von Riegeln in einer Sicherheitstür Dispositif pour le blocage de pênes dans une porte de sécurité |
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| Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). |
[0001] The present invention relates to an improvement to a device for locking bolts in a safety door.
[0002] In conventional safety doors, the bolts are connected to the lock by rods and are preset so that when the door is open the lower bolt may move downwards and make contact with the floor. To prevent this from occurring, an appropriate rod locking device is provided. Said device comprises a casing adapted to be located in a seat of the upper edge of the door and is provided with a hole for the passage of the bolt. A spring-loaded sensor is slideable in the casing and has a chamfered end that cooperates with the transverse upper member or head member of the door frame which is fixed to the wall.
[0003] A transversely-movable pin is arranged in the sensor, and its opposite ends engage slots of the casing that are shaped so as to lock the bolt in a retracted position when the sensor is expelled from the casing due to the action of the spring. Document EP-A-0 635 611 discloses a device of this type for locking bolts in emergency doors.
[0004] This device can jam if the casing is not perfectly coaxial with respect to the bolt and can therefore compromise door opening and closure.
[0005] A principal aim of the present invention is therefore to provide an improved device for locking bolts in a safety door which obviates such drawbacks.
[0006] With this aim in view, there is provided an improved device for locking bolts in a safety door as defined in the appended claims.
[0007] Further characteristics and advantages of the present invention will become apparent from the following detailed description of a preferred embodiment thereof, illustrated only by way of non-limitative example in the accompanying drawings, wherein:
figure 1 is a partially sectional view of the improved device;
figure 2 is a view of the improved device, with sectional, enlarged-scale views of two details;
figure 3 is a partially sectional view of the device, taken along the plane III-III of figure 1;
figures 4 and 5 are views of the device in two operating positions;
figures 6 and 7 are views of two situations that can occur during the installation of the improved device.
[0008] With particular reference to figures 1, 2, and 3, the device comprises a cylindrical casing 1 having flat and parallel regions 2 and 3 in mutually opposite positions.
[0009] The casing 1 is provided with a bottom 4 and, at the end opposite to the bottom 4, with an ellipsoidal flange 5, wherein two holes 6 and 7 are formed; said holes are diametrically opposite with respect to the axis A of the casing. Two bushes 8 and 9 engage loosely in the holes 6 and 7 and are rigidly coupled to the lower face of a plate 10. The plate 10 is superimposed on the flange 5 and has the same shape as the flange 5.
[0010] The bushes 8 and 9 are higher than the thickness of the flange 5 and are crossed by screws 11 and 12, which fix the plate 10 in the upper rail of the door leaf 13. The larger diameter of the holes 6 and 7 with respect to the diameter of the bushes 8 and 9 and the greater height of said bushes with respect to the thickness of the flange 5 allow said flange 5, and therefore the casing 1, to perform small tilting motions. In order to perform said tilting motions, the casing 1 is inserted loosely in a cylindrical cavity 14 that is open on the upper edge 15 of the leaf and so that the flat regions 2 and 3 are at right angles to the plane of said door leaf.
[0011] A hole 16 is formed in the bottom 4, eccentrically with respect to the axis A of the casing 1, and the bolt 17 is driven therethrough; said bolt 17 is engageable with the upper transverse member or head member of the door frame, which is fixed to a wall, in order to lock the door in a closed position.
[0012] The bolt 17 is constituted by a cylindrical rod actuated by a lock, which may be of a conventional type. The hole 16, crossed by the bolt 17, is internally tangent to the casing 1, so that the bolt is in tangent contact with the inner part of the casing along a line 18 that lies on the intermediate centerline plane P and is parallel to the flat regions 2 and 3.
[0013] The eccentric position of the bolt 17 allows to place, between said bolt and the wall of the casing 1 lying opposite to the contact line 18, a sensor 19 which detects the closed or open position of the door, so as to accordingly control the release or locking of the bolt.
[0014] Said sensor 19 is constituted by an element having a substantially U-shaped cross-section that forms, with two wings 20 and 21, a substantially semicylindrical channel 22 inside which the bolt 17 is guided.
[0015] The wings 20 and 21 are connected by a thicker portion 23, in which a hole 24 is formed at right angles to the flat regions 2 and 3 of the casing 1; said hole is ovalized so as to intersect the channel 22.
[0016] A pin 25 is inserted in the hole 24, and its opposite ends engage in slots 26 and 27 formed in the flat regions 2 and 3 of the casing.
[0017] The slots 26 and 27 comprise a lower portion 28 that is parallel to the axis A of the casing and an upper portion 29 that is inclined so that by making the sensor 19 slide in the casing 1, the pin 25 moves transversely in the hole 24.
[0018] The end of the sensor 19, which protrudes from the casing 1, has a chamfer 30 that affects not only the portion 23 but also the wings 20 and 21, so as to form a sort of spring latch adapted to retract when the sensor strikes the head member 33 of the door frame which is fixed to the wall.
[0019] The described device is completed by a spring 31 (figure 1) interposed between the bottom 4 and the sensor 19 and partially accommodated in a recess 32 of the portion 23.
[0021] Figure 4 is a view of the device in the door opening condition, i.e., with the bolt 17 retracted. By virtue of the spring 31, the sensor 19 is pushed upwards, so that the pin 25, by following the profile of the slots 26 and 27, is moved laterally in the ovalized hole 24 and is forced against the bolt 17, which is thus locked in a retracted position.
[0022] On the other hand, when the door is moved into the closed position, the sensor 19, due to the abutment of the chamfer 30 against the head member 33 of the door frame, is pushed so as to retract into the casing 1, so as to cause the spacing of the pin 25 from the bolt 17 by virtue of the slots 26 and 27, thus allowing said bolt to engage in the opening 34 of the head member 33 when the strike lock is activated.
[0023] The fundamental prerogative of the present invention resides in the fact that the casing 1, by virtue of the play between the flange 5 and the plate 10, can tilt freely and can thus cancel any axial misalignments between the bolt 17 and the sensor 19 that might cause bolt jamming. Even if the bolt 17 were not perfectly parallel to the axis A (see figures 6 and 7), the play between the flange 5 and the plate 10 would anyway allow the casing 1 to be arranged so as to allow the free sliding of the sensor 19 on the bolt 17.
[0024] Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.
1. Device for locking the bolt in a safety door, comprising a casing (1) provided with
a hole (16) for the passage of the bolt (17), and adapted to be arranged in a seat
formed in the upper edge of a door, a sensor (19) being slideable in said casing,
loaded by a spring (31), and having a chamfered end (30) for cooperation with the
head member of a door frame fixed to a wall, a transversely movable pin (25) being
arranged in said sensor, said pin (25) having opposite ends engaged in slots (26,
27) of said casing that are shaped so as to lock the bolt in a retracted position
when said sensor is expelled from said casing by the action of said spring, characterized
in that said casing (1) is accommodated loosely in a cavity (14) of the upper rail
of the door (13) and comprises a flange (5) in which holes (6, 7) are formed, said
holes being loosely engaged by bushes (8, 9) rigidly coupled to a plate (10) that
is superimposed on said flange and traversed by screws (11) for fixing to the upper
rail of the door, said bushes (8, 9) being higher than the thickness of said flange
(5), so that by abutting against the upper rail of the door they allow tilting movements
of the casing (1) in said cavity (14).
2. Device according to claim 1, characterized in that said flange (5) has an ellipsoidal
shape and in that the plate (10) comprises two bushes (8, 9) adapted to loosely engage
in two respective holes (6, 7) of said flange (5) that are formed along the major
axis thereof at the ends opposite to the casing.
3. Device according to claim 1 or 2, characterized in that said casing (1) comprises
a bottom (4) with an eccentric hole (16) for the passage of said bolt (17) and two
oppositely arranged flat regions (2, 3) in which said slots (26, 27) are formed; in
that said sensor (19) has a U-shaped cross-section with a portion that is guided between
said bolt (17) and said casing (1) and with two wings (20, 21) that wrap around said
bolt and form a channel (22) for said bolt, said pin (25) being accommodated in a
hole (24) that is ovalized so as to intersect said channel (22) to act on said bolt
when said sensor is in the position for expulsion from said casing (1) by virtue of
the action of said spring (31).
4. Device according to claim 3, characterized in that said slots (26, 27) have a portion
(28) that is parallel to the sliding direction of the sensor (19) and a portion (29)
that is inclined so that during the stroke for the expulsion of the sensor (19) on
the part of said spring (31), said pin (25) moves transversely in said ovalized hole
(24) to act so as to lock said bolt.
5. Device according to one of claims 2 to 4, characterized in that said passage hole
(24) is arranged eccentrically, so that the bolt (17) is in tangent contact with the
inside wall of the casing (1).
6. Device according to one of claims 2 to 5, characterized in that the spring (31) acting
on said sensor (19) is partially accommodated in a recess (32) thereof and rests on
the bottom (4) of the casing (1).
1. Einrichtung zum Blockieren des Riegels in einer Sicherheitstür umfassend ein Gehäuse
(1) mit einem Loch (16) für den Durchgang des Riegels (17), das in einem in der oberen
Ecke einer Tür ausgebildeten Sitz angeordnet werden kann, einen in dem Gehäuse verschiebbaren
Fühler (19), der von einer Feder (31) belastet wird und ein abgeschrägtes Ende (30)
zum Zusammenwirken mit dem oberen Teil eines an einer Wand befestigten Türrahmens
hat, einen in Querrichtung bewegbaren, in dem Fühler angeordneten Stift (25), dessen
einander abgewandte Enden in Schlitze (26, 27) des Gehäuses eingreifen, die derart
geformt sind, daß der Riegel in einer eingezogenen Stellung blockiert wird, wenn der
Fühler durch die Einwirkung der Feder aus dem Gehäuse getrieben wird, dadurch gekennzeichnet, daß das Gehäuse (1) locker in einem Hohlraum (14) des oberen Türträgers (13) sitzt
und einen Flansch (5) hat, in dem Löcher (6, 7) ausgebildet sind, in die Hülsen (8,
9) locker eingreifen, die fest mit einer auf den Flansch aufgesetzten und von Schrauben
(11) zur Befestigung an dem oberen Türträger durchquerten Platte (10) verbunden und
höher als die Dicke des Flansches (5) sind, so daß sie beim Anstoßen an den oberen
Türträger Kippbewegungen des Gehäuses in dem Hohlraum (14) erlauben.
2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Flansch (5) ellipsenförmig ist, und daß die Platte (10) zwei Hülsen (8,
9) enthält, die zum lockeren Eingreifen in zwei entsprechende Löcher (6, 7) des Flansches
(5) geeignet sind, die enlang dessen Hauptachse an den dem Gehäuse gegenüberliegenden
Enden ausgebildet sind.
3. Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Gehäuse (1) einen Boden (4) mit einem exzentrischen Loch (16) für den Durchgang
des Riegels (17) hat und zwei einander gegenüberliegende flache Bereiche (2, 3), in
denen die Schlitze ausgebildet sind; daß der Fühler (19) einen U-förmigen Querschnitt
hat mit einem zwischen dem Riegel (17) und dem Gehäuse geführten Bereich und zwei
Schenkeln (20, 21), die um den Riegel greifen und einen Kanal (22) für den Riegel
bilden, wobei der Stift in einem Loch angeordnet ist, das so unrund geformt ist, daß
es den Kanal (22) schneidet zum Einwirken auf den Riegel, wenn der Fühler sich in
der Stellung zum Austreiben aus dem Gehäuse (1) durch die Federwirkung (31) befindet.
4. Einrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Schlitze (26, 27) einen parallel zur Gleitrichtung des Fühlers verlaufenden
(19) Bereich (28) und einen derart geneigten Bereich (29) haben, daß während des Schubs
für das Austreiben des Fühlers (19) von Seiten der Feder (31) sich der Stift in Querrichtung
in dem unrund geformten Loch (24) so bewegt, daß er den Riegel blockiert.
5. Einrichtung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß das Durchgangsloch (24) exzentrisch angeordnet ist, so daß der Riegel (17) die
Innenwand des Gehäuses (1) berührt.
6. Einrichtung nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß die auf den Fühler wirkende Feder (31) teilweise in einer Aussparung (32) desselben
gelagert ist und auf dem Boden (4) des Gehäuses (1) aufliegt.
1. Dispositif pour verrouiller le pêne dans une porte de sécurité, comportant un boîtier
(1) pourvu d'un trou (16) pour le passage du pêne (17), et apte à être disposé dans
un siège formé dans le bord supérieur d'une porte, un détecteur (19) pouvant coulisser
dans ledit boîtier, subissant la poussée d'un ressort (31) et ayant une extrémité
biseautée (30) pour coopérer avec l'élément frontal d'un encadrement de porte fixé
à une paroi, une broche (25) mobile de manière transversale étant disposée dans ledit
détecteur, ladite broche (25) ayant des extrémités opposées engagées dans des encoches
(26, 27) dudit boîtier, d'une forme conçue pour verrouiller le pêne en position rentrée
lorsque ledit détecteur est expulsé dudit boîtier sous l'action dudit ressort, caractérisé
en ce que ledit boîtier (1) est reçu librement dans une cavité (14) du rail supérieur
de la porte (13) et comporte un rebord (5) dans lequel des trous (6, 7) sont formés,
des douilles (8, 9) couplées de manière rigide à une plaque (10) superposée audit
rebord étant engagées librement dans lesdits trous et traversées par des vis (11)
de fixation au rail supérieur de la porte, lesdites douilles (8, 9) ayant une hauteur
plus grande que l'épaisseur dudit rebord (5), de façon qu'en butant contre le rail
supérieur de la porte elles permettent des mouvements de basculement du boîtier (1)
dans ladite cavité (14).
2. Dispositif selon la revendication 1, caractérisé en ce que ledit rebord (5) a une
forme ellipsoïdale et en ce que la plaque (10) comporte deux douilles (8, 9) aptes
à s'engager librement dans deux trous respectifs (6, 7) dudit rebord (5) formés suivant
le grand axe de celui-ci, aux extrémités opposées au boîtier.
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que ledit boîtier (1)
comporte un fond (4) avec un trou excentré (16) pour le passage dudit pêne (17) et
deux zones plates (2, 3) disposées de manière opposée et dans lesquelles sont formées
lesdites encoches (26, 27); en ce que ledit détecteur (19) a une section transversale
en U avec une partie guidée entre ledit pêne (17) et ledit boîtier (1) et avec deux
ailes (20, 21) qui enveloppent ledit pêne et forment un canal (22) pour ledit pêne,
ladite broche (25) étant reçue dans un trou (24) ovalisé afin de croiser ledit canal
(22) pour agir sur ledit pêne lorsque ledit détecteur est en position pour être expulsé
dudit boîtier (1) sous l'action dudit ressort (31).
4. Dispositif selon la revendication 3, caractérisé en ce que lesdites encoches (26,
27) ont une portion (28) parallèle à la direction de coulissement du détecteur (19)
et une portion (29) inclinée de façon que, pendant la course pour l'expulsion du détecteur
(19) sur la partie dudit ressort (31), ladite broche (25) se déplace de manière transversale
dans ledit trou ovalisé (24) pour contribuer à verrouiller ledit pêne.
5. Dispositif selon l'une des revendications 2 à 4, caractérisé en ce que ledit trou
de passage (24) est agencé de manière excentrée de façon que le pêne (17) vienne de
manière tangentielle au contact de la paroi intérieure du boîtier (1).
6. Dispositif selon l'une des revendications 2 à 5, caractérisé en ce que le ressort
(31) agissant sur ledit détecteur (19) est partiellement reçu dans un évidement (32)
de celui-ci et repose sur le fond (4) du boîtier (1).