DK2367996T3

DK2367996T3 - CLOSING FURNITURE FOR FIRE PROTECTION DOOR OR WINDOWS

Info

Publication number: DK2367996T3
Application number: DK09801154.7T
Authority: DK
Inventors: Martin Hadebusch; Günter Wiedemann
Original assignee: Promat Gmbh
Priority date: 2008-12-20
Filing date: 2009-12-08
Publication date: 2017-06-12
Also published as: DE202008016782U1; EP2367996B1; EA022352B1; UA100615C2; PL2367996T3; EP2367996A1; ES2624720T3; EA201170851A1; PT2367996T; WO2010069498A1

Description

DESCRIPTION

The present invention relates to a closing device for a pivoting and/or tilting fire protection element, more particularly in the form of a fire protection door or a fire protection window, comprising a glazing composed of at least two glass panes spaced in parallel from each other, furthermore a lock latch device for a closing device of this kind, as well as a fire protection element which has a closing device or a lock latch device of this kind.

Closing devices for fire protection doors or windows are known from the prior art. The German Gebrauchsmuster DE 2 98 19 67 8 (Ul) proposes a fire protection glazing with a window in which the closing mechanism is integrated in the frame of the window. The window is furthermore incorporated in the fire protection wall element by means of a fastening frame. With this solution it can be considered disadvantageous that the window cannot be installed frameless whereby the light transmission through the glazing is reduced.

In DE 20 2004 002 479 Ul a fire protection glazing is described having a frameless twin-panel door of intumescent fire protection glass which can be bolted by a lock. With a design of this kind it is considered disadvantageous in part that due to the screws penetrating through the pane for fastening the lock, and due to the clamping seat of the lock created in this way only solid fire protection panes or composite fire protection panes of fire-resistant glass with solid intumescent layers lying between the glass panes can be used. This is due to the fact that fire protection panes filled with fire protection gel are not pressure-stable opposite forces acting perpendicularly on the glass surfaces since the gel filling offers no solid resistance. With pressure acting from outside on the surfaces of the panes, by way of example through the clamping seat of a lock, the glass surface exposed to the pressure would consequently buckle inwards and the gel filling would thereby be shifted. This leads to deterioration in the fire protection properties and furthermore as a result of the change in the thickness of the gel layer in the pane to optical distortions.

In the case of a construction as previously described it can likewise be considered disadvantageous that in order to fasten the lock at least four closely adjacent holes are generally required in the intumescent glazing, namely for fastening the door fittings on both sides and for passing through the square spindle and locking cylinder. These holes lead to a considerable mechanical weakening in the fire protection glass at the designated points since they act like perforations as a result of their closeness to each other. This can lead to the lock breaking if the door is slammed shut too hard, whereby this may destroy the entire door if fire protection safety glass is used.

The DE 41 23 977 A1 discloses a closing device for fastening onto a pivoting fire protection element of glass. The glazing consists of a fire protection double glazing on which a lock case housing with a door handle is fastened. A counter-plate is screwed to the lock case housing on the side of the glazing opposite the lock case housing whereby the screws are guided through sleeves with which the lock case housing and the counter-plate are held spaced apart. A design of this kind is further known from the DE 10 2007 000 905 B3 and the DE 44 00 196 Cl.

The object of the present invention now consists in providing a closing device for fire protection doors or windows which when installed in a fire protection door or a fire protection window impairs the mechanical stability of the glazing as little as possible and which at the same time allows the use of double glazings of fire protection glass, more particularly of double glazings filled with fire protection gel. Despite this the closing device is to be solidly fixable on the fire protection door and enable the lowest possible heat transfer in the event of fire from the fire side to the counter fire side. Finally the closing device is to be configured so that it ensures the maximum amount of light to pass through the door or the window.

The object according to the invention is achieved through a closing device for a pivoting and/or tilting fire protection element, more particularly in the form of a fire protection door or a fire protection window, comprising glazing composed of at least two glass panes spaced in parallel from each other, according to claim 1. The closing device comprises at least : • a lock case housing into which a lock case with an integrated locking mechanism is inserted and fixed, wherein the lock case housing is provided for mounting on the glazing of the pivoting and/or tilting fire protection element, • at least one counter-plate for the lock case housing • at least one sleeve-like spacer as well as • at least one mineral fire protection plate, wherein the lock case housing is connected to the counterplate via at least one fixation means which is guided through the spacer and the fire protection plate is held in a clamping position between the lock case housing and the counter-plate such that the lock case housing projects beyond the fire protection plate at least on two opposite sides, wherein the spacer is composed of a sleeve and at least two stop faces which are spaced in parallel from each other and firmly connected to the sleeve, wherein the sleeve projects on both sides of the stop faces, wherein the spacer fixes the distance predefined by the stop faces between the parallel glass panes.

The present invention is based on the knowledge that by means of a lock case housing which can be mounted on the glazing by using a fire protection plate inserted between this housing and a counter-plate in combination with one or more spacers a door lock can be fastened on a gel-filled fire protection pane without impairing its fire protection properties.

To install the closing device according to the invention in a fire protection double glazed door or window the fire protection double glazing filled with a fire protection gel has to have a circumferential recess in the form of the fire protection plate of the closing device. Furthermore at least one continuous bore has to be provided in the fire protection double glazing adjacent this recess whereby the spacer is inserted in the bore. In the event of a lock case housing which can be mounted by way of example on the glass surfaces the lock case housing is positioned from one side and the counter-plate is positioned from the other side above the fire protection plate and a part of the fire protection glazing and is fixed by means of a fixation means, such as for example a screw, which is guided through the bore and the sleeve-like spacer. In this way on the one hand the heat transmission through the door or the window in the lock region is minimized by means of the fire protection plate. At the same time the spacer ensures that the lock case housing and the counterplate can be fixedly attached to the fire protection double glazing, by way of example by means of a screw fitting, without the panes of the fire protection double glazing being able to bend through the mechanical forces and torques thereby arising. The spacer fixes the parallel glass panes at the spacing predetermined by the stop faces even when the screws are firmly tightened up.

The solution according to the invention is characterised by a series of advantages. The closing device according to the invention enables by way of example the use of fire protection double glazings, more particularly of fire protection panes filled with fire protection gel, although the use of this closing device is not restricted to these special types of fire protection panes.

Fire protection panes filled with fire protection gel or hydrogel are described by way of example in EP 1 820 931 A1 and in DE 10 2005 018 842 A1. These fire protection panes have compared to the other often used fire protection panes with solid siliceous intumescent intermediate layers, by way of example sodium silicate based, the advantage that they can have a lower weight per unit area with a comparable fire resistance class. This means not only an easier transport of the panes, but also that owing to the lighter load the holding and frame structure can be configured lighter. Furthermore the fire protection panes filled with fire protection gel, compared to the panes with solid siliceous intumescent intermediate layers, are considerably less susceptible to penetrating dampness which in the last mentioned case leads to cloudiness of the intermediate layer which requires the pane to be replaced.

Fire protection panes filled with fire protection gel normally consist of two glass panes, spaced in parallel from one another, of single pane safety glass (ESSG) which are fixed and connected to one another via a circumferential spacer profile lying in its marginal regions between the glass panes and for example a polyurethane edge joint. The fire protection gel or the pre-components are filled through an opening in this spacer profile, wherein in the latter case the gel formation is carried out by polymerisation to form the hydrogel in the hollow space between the glass panes which is filled up with the mixture.

The gel which fills in these fire protection panes is however not completely solid but depending on the degree of moisture and the quantity of monomers in relation to the water content retains a more or less solid gel-like consistency. This makes fire protection panes filled with a gel of this kind relatively sensitive to pressure acting on the glass surfaces, since the gel slides in the layer in the event of a slight deformation of the glass pane. For this reason up until now no closing devices could be attached to these panes in which pressure is exerted on the glass panes, but the panes had to be set in a frame on which the holders can then engage,

By using a fire protection plate in a recess provided in the glazing and the direct fixation of the lock case on the fire protection double glazing it is now possible to create fire protection doors or windows filled with fire protection gel wherein the panes need not each be set in a circumferential frame for holding the closing mechanism. In this way the doors or windows fitted with a closing device according to the invention enable a much higher light transmission. Fire protection elements of this kind furthermore are optically attractive and since the panes are not buckled neither the fire protection properties of the glazing are impaired nor is there any optical distortion.

According to the claims the closing device according to the invention comprises a lock case housing in which a lock case with an integrated closing mechanism is inserted and fixed. This lock case housing can be by way of example a rectangular case in which the lock case can be installed with the door lock. The case consists by way of example of metal, more particularly stainless steel or chromium-plated or nickel-plated steel. The integrated closing mechanism is the locking mechanism of the lock which can comprise several types of closure, such as by way of example a latch bolt, a drive bolt and/or an automatic bolt.

The closing device according to the invention furthermore comprises at least one counter-plate for the lock case housing. When fixing the closing device according to the invention on a fire protection glazing this counter-plate is attached to the surface of the glazing opposite the lock case housing and is connected to the lock case housing. For this by way of example a fixation means, by way of example a screw, is passed through a hole in the counter-plate and through holes provided in the glazing and is turned and then fixedly tightened in a thread provided in the lock case. This thread is preferably provided on a surface of the lock case which faces the glazing. The counter-plate can have different geometric forms. One possibility is where this counter-plate has more or less the same form and size as the base surface of the lock case housing, wherein it is likewise possible that the counter-plate has the same length as the lock case housing, but is designed slightly narrower than the latter.

The closing device according to the invention furthermore has at least one mineral fire protection plate. Mineral fire protection plates are known per se and consist by way of example of pressed or sintered siliceous material. Siliceous fire protection plates can be made from different raw materials and in different ways. To achieve very good insulation effects fire protection plates are made by pressing the raw materials wherein it is endeavoured to substantially dispense with binding agents. These fire protection plates are frequently sintered at high temperatures in order to be able to achieve higher mechanical strengths. Organic binding agents disintegrate when used in fire protection plates on account of their lack of temperature resistance, wherein the use of inorganic binding agents can reduce the insulating performance. Fire protection plates which can be produced only by pressing are described by way of example in the patent specification EP 1140729.

The fire protection plate used within the scope of the present invention is located in the assembled state of the closing device according to the invention between the lock case housing and the counter-plate which are connected to one another by one or more fixation means. In this way the fire protection plate is held in a clamping position between the lock case housing and the counter-plate. The lock case housing and where applicable also the counter-plate project beyond the fire protection plate on at least two opposing sides. When using the closing device according to the invention as a door lock fixed on a side edge of the door this would preferably be the upper and lower side edges of the lock case housing or counter-plate. The fire protection plate has for this purpose a smaller base surface wherein by way of example either only the length of the fire protection plate is less than the length of the lock case housing and/or also the width is less than that of the lock case housing.

The closing device according to the invention furthermore comprises at least one sleeve-like spacer. This is inserted in the glazing between the two glass panes. When installing the closing device according to the invention the fixation means which connects the lock case housing and the counterplate together is passed through this sleeve-like spacer. Since the lock case housing and the counter-plate when installed in a door project beyond the fire protection plate on the upper and lower side edges and rest there on the glazing, the clamping seat for the fire protection plate also acts on the glazing, more particularly when the thickness of the fire protection plate corresponds approximately to the thickness of the glazing. The spacer now serves to hold the glass panes of the fire protection double glazing at the spacing predetermined by their circumferential spacer profile and take up the resulting mechanical forces of the clamping seat. In this way the glass panes of the double glazing are effectively prevented from buckling.

When assembling the fire protection glazing from two individual panes the spacer is attached at these corresponding holes provided in these panes for passing through the or each fixation means for fixing the closing device. The spacer can for this purpose be inserted into these holes and connected to the glass panes, preferably by a casting resin, a sealant substance or an adhesive.

According to a preferred embodiment of the closing device according to the invention the spacer comprises a sleeve and at least two stop faces spaced in parallel and fixedly connected to the sleeve, wherein the sleeve protrudes on both sides of the stop faces. By combining a sleeve with two stop faces for the glass panes it is possible with a spacer configured in this way to absorb even higher mechanical forces and torques acting on the glass panes and to hold the glass panes of the fire protection double glazing at the predetermined spacing. These forces arise particularly when firmly tightening up the fixation means in order to produce the clamping seat which ensues between the lock housing and the counter-plate for the fire protection plate. A particular advantage of the spacer which is provided with stop faces exists where in the case where in the event of a fire the glass pane on the fire side splits through the high temperatures, the broken pieces of this glass pane are still held for a certain time by the fire protection gel and thus a part of their protective action is maintained. The lock is also reliably held by the spacer on the pane on the counter fire side which is furthermore cooled by the fire protection gel. For the mechanical connection through the screw fastening between the counter-plate and the lock case housing remains intact independently of the state of the glass pane on the fire side. This advantageous effect also happens irrespective of from which side the fire strikes the fire protection glazing which is fitted with the closing device according to the invention. The fire protection plate which is held in a clamping position is in this way likewise held in its original position and thus furthermore ensures a reliable insulation in the lock region. The closing device according to the invention thus remains intact even with continuing exposure to fire even after the pane on the fire side has cracked.

The stop faces of the spacer are in a particularly preferred variation ring-shaped. This enables a particularly uniform absorption of the mechanical forces acting on the glass panes. A further development of the closing device according to the invention proposes that the spacer is made from plastic or metal, more particularly from metal coated with plastic.

Suitable plastics can be by way of example glass fibre reinforced plastics (GFK), polyethylene (PE) or polypropylene (PP) . If fire protection panes having a fire protection gel are used then the plastic must at the same time have an adequate chemical resistance to the fire protection gel.

Spacers of metal can be made for example from iron, steel, stainless steel or aluminium. These metals are preferably coated with plastic to prevent interactions with the fire protection gel. These interactions can lead on the one hand to superficial corrosion of the spacer and at the same time to discolouration of the fire protection gel as well as to the formation of gas bubbles in the gel, which can impair the optical appearance of the glazing. As plastic coating for the metals can be considered in principle all the plastics which on the one hand adhere to the metal and which on the other have adequate chemical resistance to the fire protection gel which is used. To this end the spacer which is made of metal can be coated with by way of example polyethylene, polypropylene or PTFE. The desired protection can also be achieved by powder coating. The plastic coating can in this case also provide at the same time the function of a separating and damping element since the direct contact between the metal and glass pane is prevented.

It is likewise possible to make the spacer from a hard plastic, which in itself has insufficient chemical stability in relation to the fire protection gel, and then to coat this plastic spacer in an analogous manner to the metal spacers with one of the aforementioned plastics in order to ensure the chemical resistance of the component.

The spacers used according to the invention can either be machined by stock removing work from one piece of material, for example on a lathe, or can be made by means of a casting process. It is however likewise possible to make the spacer from a sleeve and the two stop faces by joining these components together using adhesive, welding or a similar joining process.

According to a particularly preferred embodiment the closing device according to the invention has at least two sleeve-like spacers. This is particularly preferred since in this way the mechanical forces and torques acting on the adjacent fire protection glazing through the clamping seat of the fire protection plate are distributed more evenly. In a particularly advantageous manner the spacers are thus positioned so that the one spacer is placed above the fire protection plate and the second spacer is placed below the fire protection plate each in the region of the overhang of the lock case housing in the glazing. If a third spacer is used then this can be positioned next to the fire protection plate in the region of a third hole in the fire protection glazing. The lock casing should then protrude beyond the fire protection plate more expediently also on this third side.

In a further preferred way the closing device according to the invention is configured so that the lock case housing and/or the counter-plate has on the mutually facing surfaces a separating and damping element which prevents the direct contact between the metal and glazing. A damping element of this kind can be by way of example a surface element of plastic, more particularly PTFE or a polyamide, more particularly aramid, silicon or rubber, more particularly in the form of a film, which is adapted as regards its base surface to the lock case housing or counter-plate. In a quite particularly advantageous form the damping element is made from a heat-resistant material. This is particularly advantageous since in this way a reliable clamping seat for the fire protection plate can be produced without the lock case housing and the counter-plate, which are normally made of metal, being in direct contact with the glass panes. The damping element can also be formed so that it only covers the region in which the lock case housing and the counter-plate have contact with the fire protection glass.

It is proposed according to the invention that the lock case housing and the counter-plate are connected to one another by a fixation means. This fixation means can be by way of example a metal pin which is welded onto both sides or however in an advantageous manner the fixation means can be a screw. This opens up the possibility of accurately fixing the clamping seat for the fire protection plate via the torque applied to the screw when tightening. The counter-plate can in this case have a conical recess for receiving the head of a particularly preferred countersunk screw wherein the lock case housing has on its side facing the fire protection pane a hole in which a thread is cut.

Within the scope of the present invention it is further preferred if the fire protection plate which is inserted in the closing device according to the invention has at least one opening for passing through a square spindle. In this way the actuation of a latch bolt can be ensured from the side of the counter-plate with simultaneously good heat insulation in the region where the closing device according to the invention is attached to a fire protection glass door.

For this reason an embodiment is likewise preferred in which the fire protection plate inserted in the closing device according to the invention has at least one opening for passing through a locking cylinder.

According to a further development of the present invention the fire protection plate inserted in the closing device according to the invention is made from sintered pressed material, more particularly from a siliceous material or alternatively gypsum plates, perlite plates as well as further mineral plates known per se. This is particularly advantageous because these said materials or fire protection plates have good thermal insulation properties and can be easily cut to the required formats, particularly if the fire protection plates are to be provided with profiling, by way of example in the form of a spring formed at the abutting edges of the fire protection plate.

The fire protection plate used according to the invention is furthermore preferably formed substantially rectangular or sguare shape. Even if other forms are conceivable and possible, such as circular or semi-circular blanks, a rectangular or square shape is still advantageous because this shape can not only be easily produced for the fire protection plate, but also because these geometrical shapes can be easily cut out as recesses from the glass panes. It is more especially preferred if the rectangular or square shaped fire protection plates have one or more rounded corners.

It is likewise preferred if the fire protection plate used within the scope of the closing device according to the invention has a thickness which corresponds at least to the thickness of the glazing. In this way by means of the fixation means a sufficient tension can be produced between the lock case housing and the counter-plate in order to ensure a clamping seat for the fire protection plate when inserting a damping element.

According to a particularly preferred embodiment here of the closing device according to the invention the fire protection plate comprises a spring-like profile on at least one of its edges facing the spaced glass panes wherein the thickness of the fire protection plate in the area of the spring-like profile corresponds at most to the inner distance of the glass panes spaced from each other. Fire protection glazings filled with fire protection gel comprise, as already detailed above, an internal circumferential spacer profile which can be offset slightly inwards from the respective abutting edges of the glass panes. In this way in the case of gel-filled fire protection panes a circumferential groove is formed in which a fire protection plate, as described in this embodiment, can engage by its correspondingly formed spring-like profile. This embodiment is particularly preferred since in this way an exact positioning of the fire protection plate in a correspondingly formed recess in the fire protection glazing is possible. The spring of the fire protection plate furthermore ensures an improved thermal insulation in the region of the groove of the fire protection glazing. The height of the spring-like profile of the fire protection plate is then more expediently adapted to the depth of the groove in the glazing insofar as the spring has a height which corresponds at most to the depth of the groove.

As an alternative to this embodiment, with the closing device according to the invention the fire protection plate can have a thickness which corresponds at most to the inner distance of the glass panes which are spaced apart from each other. Then one further fire protection plate is attached to each side of this fire protection plate, these further plates having a thickness which is nearly equal to or higher than the thickness of the glass panes of the glazing. A compound fire protection plate structure is hereby formed with one inner and two outer fire protection plates. The individual plates can either be laid loose on each other or can be adhesively bonded with adhesives which can be used for bonding the fire protection plates. The inner of these three fire protection plates can have a greater width and length than the outer fire protection plates. The fire protection plates can thereby be positioned one above the other so that the inner fire protection plate projects at its abutting edges facing the fire protection glazing beyond the other fire protection plates which are located on the two sides, and forms a spring. In this way, with gel-filled fire protection panes the same tongued and groove connection can be achieved as described above and with the advantages associated therewith.

The embodiment mentioned here with a compound fire protection plate structure has however the further advantage that the abutting edges of the fire protection plate need not be machined to form a spring-like profile - that can be advantageous in the case of fire protection plate materials which can be difficult to machine.

Furthermore when using several fire protection plates positioned on each other it is possible to increase the thermal insulation properties and the mechanical strength of this compound fire protection plate structure. Thus by way of example the two outer fire protection plates can be made from a mechanically resilient material since these are exposed directly to the pressed seat between the lock case housing and the counter-plate. The fire protection plate which is located between these plates can then be made from a material which has particularly good thermal insulation properties. These advantages can also be achieved with a compound fire protection plate structure in which the fire protection plates have nearly the same length and width. A further object of the present invention consists in a lock latch device for a closing device according to the invention for fastening on a fire protection element, more particularly in the form of a fire protection wall element, a fire protection door or a fire protection window, with glazing composed of at least two parallel spaced glass panes, according to claim 13. The lock latch device comprises at least : • a lock latch housing into which a lock latch is inserted and fixed, in particular a lock latch housing which is provided for mounting on the glazing of a fire protection element • at least one counter-plate for the lock latch housing • at least one sleeve-like spacer, wherein the lock latch housing is connected to the counterplate via at least one fixation means which is guided through the spacer.

By a lock latch housing is meant in the sense of the present invention a housing into which one or more lock latches are inserted for the bolt of a closing device. The lock latch housing can be made from the same materials as the lock case housing. The lock latch is by way of example a sheet metal plate which has recesses for the or each bolt of the corresponding closing device at corresponding positions and in corresponding numbers.

The counter-plate of the lock latch housing can be configured analogous with the counter-plate of the lock case housing.

The sleeve-like spacer likewise corresponds to that which is used with the closing device according to the invention. In the case of the lock latch device according to the invention at least two spacers are preferably also used which are each inserted in bores provided in the glazing and are adhesively bonded where applicable to the glazing.

The fixation means which can be used for the lock latch device likewise correspond to the fixation means mentioned for the closing device according to the invention.

The lock latch device according to the invention is particularly advantageous since this can be used even with gel-filled fire protection glazings on account of the sleeve-like spacers. The provision of a recess for a fire protection plate as in the case of the closing device according to the invention is not required with the lock latch device according to the invention since additional holes have to be provided for the square spindle or locking cylinder. The fire protection double glazing is only to be provided with one or preferably two holes at corresponding places into which the spacer described above is inserted. The spacer ensures when using the fixation means, by way of example in the form of a screw, for connecting the lock latch housing and counterplate, that the mechanical forces and torques arising when tightening the screw are taken up by the spacer and cannot lead to a deformation of the glass panes.

With the lock latch device according to the invention the spacer also ensures in a manner analogous with the closing device that in the event of the pane on the fire side cracking in the event of a fire the lock latch device remains intact and its function is maintained. A further object of the present invention is therefore a fire protection element, more particularly in the form of a fixed fire protection glazing, a fire protection door or a fire protection window, with a glazing comprising at least two glass panes which are spaced parallel to each other wherein the glazing is provided on a side edge with a lock latch device according to the invention. The glazing is preferably a fire protection glazing filled with fire protection gel. A further object of the present invention consists in a pivoting and/or tilting fire protection element, more particularly in the form of a fire protection door or a fire protection window, with a glazing comprising at least two glass panes spaced parallel to each other wherein the glazing is provided on a side edge with a recess in which a closing device according to the invention is fixed in such a way that the fire protection plate of the closing device is inserted in the recess and the spacer of the closing device is inserted between the glass panes.

The pivoting and/or tilting fire protection element according to the invention can be a single leaf or also a double-leaf and in order to produce the pivoting and/or tilting properties can be provided in a manner known per se with hinges or articulated joints. Double-leaf pivoting and/or tilting fire protection elements can be achieved more particularly by combining the closing device and lock latch device according to the invention, preferably each with a frameless glazing filled with fire protection gel.

The fire protection elements according to the invention can also be provided with several recesses into which several closing devices are fastened correspondingly. This can be necessary by way of example in the case of large-scale fire protection windows.

With the pivoting and/or tilting fire protection element according to the invention it has proved advantageous if the recess has substantially the shape of the fire protection plate. In this way a solid seat of the closing device and a good thermal insulation can be ensured.

It is particularly preferred if with the pivoting and/or tilting fire protection element according to the invention glazings are used which have an internal circumferential spacing profile which is spaced from the edge. A groove is hereby formed at the abutting edges of the glazing into which a fire protection plate of the closing device according to the invention provided with a correspondingly formed spring engages in part. In this way the exact positioning and fixing of the fire protection plate and thus also the closing device can be improved as well as the thermal insulation of the fire protection element in the region of the closing device.

According to a further development of the pivoting and/or tilting fire protection element according to the invention the spacer is connected by a filler material to the glass panes. As filler material can be used by way of example adhesives, more particularly gap-bridging adhesives, or even casting resins or silicon. The casting resins can comprise a single component or dual component. In this way a reliable connection can be achieved between the spacer and the glass panes of the fire protection double glazing. More particularly in the case of glazings filled with fire protection gel a sufficient sealing tightness is ensured against the fire protection gel flowing out from the bores for the spacer.

According to a preferred embodiment of the pivoting and/or tilting fire protection element according to the invention the spacer of the closing device according to the invention comprises a sleeve and at least two stop faces which are spaced in parallel from each other and are firmly connected to the sleeve, wherein the sleeve projects on both sides of the stop faces and the respective sections of the sleeve which project beyond the stop faces, comprise a length which is equal to or greater than the thickness of the glass panes. In this way the spacer can expediently take up the mechanical forces which arise when tightening up the fixation means to produce the clamping seat for the fire protection plate. If the sections of the sleeve which project beyond the stop faces are configured longer than the thickness of the glass panes then this furthermore enables the integration of separating and damping elements between the respective counter-plate or lock case housing and the glazing. A pivoting and/or tilting fire protection element according to the invention is further preferred in which the space between the glass panes is filled with a gas, a liquid or a gel, more particularly a fire protection gel. All gels known to the technical expert for this purpose can be used in principle as fire protection gel. The fire protection gels used within the scope of the invention can also contain additives such as silicate, UV-protection means or even dyes. The glazings filled with a fire protection gel are particularly preferred since these have very good fire protection properties and can be fixed frameless by means of the holder according to the invention. The construction according to the invention of the closing device and also the lock latch device furthermore ensures that even when a pane cracks in the event of fire the functioning of the closing device and the lock latch device is further ensured through the other fire protection pane which is still intact.

According to a particularly preferred embodiment of the pivoting and/or tilting fire protection element at least one of the glass panes consists of safety glass, more particularly a single-pane safety glass. This is particularly advantageous since in the event of extremely high temperatures in the event of fire this splinters into very many small fragments from which on the one hand there is a lower risk of injury but which on the other hand even in the burst state cling extremely well to the fire protection gel and thus furthermore protect the fire protection gel against direct flame contact for a certain time. The use of glass types which have a high temperature resistance, such as by way of example Duran ®, is particularly advantageous here. Since single-pane safety glass can no longer be cut once pretensioned, the opening for the spacer of the closing device or lock latch device according to the invention as well as also the recess for the fire protection plate of the closing device according to the invention has to be already provided in the glass panes prior to pretensioning.

According to the invention however other glass panes can equally be used such as float glass or even laminated safety glass .

The glass panes used for the pivoting and/or tilting fire protection elements according to the invention can in principle assume any desired thickness. For fire protection purposes, more particularly for producing double glazings filled with fire protection gel, it is expedient if the individual glass panes have independently of one another a pane thickness of 1 to 15 mm, preferably 2.5 to 10 mm.

The spacing between the two glass panes in a double glazing of this kind can likewise be adapted in any way to the requirements. Irrespective of whether the interspace between the glass panes is filled with a gas, a liquid or a gel, more particularly a fire protection gel, a spacing between the glass panes of 5 to 50 mm has proved sufficient for most applications. It is particularly preferred if the spacing between the glass panes amounts to about 8 to 25 mm, since in this way, particularly with fire protection glazings filled with fire protection gel, good fire resistances can be achieved with at the same moderate weight of the glazing.

According to a further preferred embodiment of the pivoting and/or tilting fire protection element the fire protection element is configured frameless. This is particularly advantageous because fire protection elements of this kind have a high light transmission which is not impaired by frame components. Furthermore as a result of the homogeneity of the materials, in the event of a fire lower mechanical stresses occur which can arise in the case of glazings set in frames owing to the different thermal coefficients of expansion.

Exemplary embodiment

The functioning of the closing device according to the invention will now be described below with reference to Figures 1 to 8. In the drawings:

Fig. 1 shows a plan view of the closing device according to the invention;

Fig. 2 shows a side view of the closing device according to the invention;

Fig. 3 shows a detailed view of the closing device illustrated in Fig. 1 along the section line A-A;

Fig. 4 shows in plan view a detailed illustration of the fire protection plate inserted in a recess of the glazing;

Fig. 5 shows a detailed illustration of Fig. 4 in the region of the transition between the fire protection plate and glazing along the section line B-B;

Fig. 6 shows in a three-dimensional illustration the closing device according to the invention, from the fire side;

Fig. 7 shows in a three-dimensional illustration the closing device according to the invention from the counter-fire side; and

Fig. 8 shows in a three-dimensional illustration a detailed view of the fire protection plate inserted in a recess of the glazing.

Fig. 1 shows a closing device 1 according to the invention for a pivoting and/or tilting fire protection element 2 with a glazing 3, here a frameless fire protection glass door. The glazing 3 consists as shown in Fig. 2 of two glass panes 4 and 5 of single-pane safety glass, which are spaced parallel to each other. An inner circumferential spacer profile 6, illustrated in Fig. 1, is positioned between the glass panes 4 and 5 .

The closing device 1 comprises, as shown in Fig. 1, a lock case housing 7 with integrated closing mechanism set on the glazing 3, wherein the closing mechanism comprises a latch bolt 8, which can be actuated by means of a square spindle 10 via a door handle 9, and a drive bolt 11 which can be actuated by means of a locking cylinder 12.

According to Fig. 2 a counter-plate 13 is located opposite the lock case housing 7 and, as can be seen in the detailed view according to Fig. 3, is connected to the lock case housing 7 by means of a fixation means 14 in the form of a screw, wherein the screw is guided through a sleeve-like spacer 15. A rectangular mineral-type fire protection plate 16, which is shown in Fig. 4 without a lock case housing 7 and counterplate 13 and which has two rounded corners, is held with clamping fit between the lock case housing 7 shown in Fig. 2 and the counter-plate 13. The fire protection plate 16 is inserted in a correspondingly shaped recess 17 in the glazing 3. The fire protection plate 16 furthermore has an opening 18 for the square spindle 10, an opening 19 for the locking cylinder 12 as well as further openings 20 for the fastening screws for the fitments 21.

The height of the fire protection plate 16 and thus also the recess 17 is selected so that all the openings 18, 19, 20 are located within the surface area of the fire protection plate 16. The length of the fire protection plate 16, i.e. its perpendicular extension is clearly less than that of the lock case housing 7 and also the counter-plate 13 wherein the lock case housing 7 and the counter-plate 13 are positioned on the fire protection plate 16 so that they project beyond the upper and lower side edges of the fire protection plate 16.

The spacer 15 illustrated in Fig. 4 consists of plastic-coated stainless steel and has on one side annular stop faces 22 formed thereon for the glass panes 4 and 5 as well as a sleeve 23 for guiding through the fixation means 14. The glass panes 4 and 5 each have a bore 4a and 5a respectively in which a spacer 15 is adhesively bonded to the glass panes 4 and 5 with the respective outer regions of the sleeve 23 by means of a filler material 24, here a casting resin. A separating and damping element 25 in the form of a rubber pad is located between the lock case housing 7 and the glass pane 5 as well as between the counter-plate 13 and the glass pane 4.

Fig. 5 shows a detailed view of the fire protection plate 16 along the section line B-B of Fig. 4. The fire protection plate 16 has a thickness which corresponds to the inner spacing of the glass panes 4 and 5 from each other. The glass panes 4 and 5 are fixed at this distance by the inner slightly inwardly off-set circumferential spacer profile 6. The spacer profile 6 likewise has a sealing function which prevents the fire protection gel 26 between the glass panes 4 and 5 from flowing out .

The fire protection gel 26 is produced by way of example as a hydrogel of NaCl/MgCl2 salt solution with the addition of polymerisable compounds such as a mixture of acrylamide, N-methylolacrylamide, methylenebisacrylamide and a polymerisation accelerator in water either prior to filling in between the glass panes 4 and 5 or is created in situ between the glass panes 4 and 5 by mixing the aforementioned components with one another and filling them directly into the hollow space between the glass panes 4 and 5. The polymerisation into the hydrogel is then carried out in the hollow space between the glass panes 4 and 5 which is now filled with the mixture.

Fig. 5 further shows that between the glass panes 4 and 5 through the slightly inwardly off-set circumferential spacer profile 6 a groove 27 is formed in which the fire protection plate 16 engages by its abutting edge 28. The circumferential spacer profile is comprised of a U-shaped profile 6a and a sealing profile 6b. Two further fire protection plates 29, each having the thickness of the glass panes 4 and 5, are located either side of the fire protection plate 16 wherein the abutting edges of the fire protection plates 29 are in contact with the abutting edges of the glass panes 4 and 5. The fire protection plate 16 is provided with cover strips 31 in the region of the abutting edge 30 opposite the glazing 3 and is covered at the abutting edge 30 with the closure profile 32.

Fig. 6 shows the closing device 1 from the fire side and Fig. 7 shows the closing device from the counter fire side, each in three-dimensional illustrations inclined from above. Fig. 8 shows the fire protection plate 16 inserted in the recess 17 of the glazing 3 in a three-dimensional illustration inclined from below.

REFERENCE NUMERAL LIST 1 Closing device 2 Pivoting and/or tilting fire protection element 3 Glazing 4 Glass pane 4a Bore 5 Glass pane 5a Bore 6 Spacer profile 6a U-shaped profile 6b Sealing profile 7 Lock case housing 8 Latch bolt 9 Door handle 10 Sguare spindle 11 Drive bolt 12 Locking cylinder 13 Counter-plate 14 Fixation means 15 Sleeve-type spacer 16 Mineral fire protection plate 17 Recess 18 Opening 19 Opening 20 Opening 21 Fitments 22 Stop face 23 Sleeve 24 Filler material 25 Damping element 26 Fire protection gel 27 Groove 28 Abutting edge 29 Fire protection plate 30 Abutting edge 31 Cover strip 32 Closure profile

Claims

A closure device (1) for a pivotable and / or tiltable fire protection element (2), in particular in the form of a fire protection door or a fire protection window, with a glass portion (3) of at least two glass washers (4, 5) arranged in parallel at a distance, the closure device (1) at least comprising: - a lock box housing (7), in which is inserted and secured a lock box with an integrated lock mechanism, wherein the lock box housing (7) is arranged for mounting on the pivotable and / or tiltable fire protection element (2) glass portion (3), - at least one counter plate (13) for the lock box housing (7), - at least one hollow spacer (15), and - at least one mineral fire protection plate (16), wherein the lock box housing (7) is connected to the counterplate (13) via at least one fixative (14) passed through the spacer (15), and the fire protection plate (16) is held in a pinch between the lockbox housing (7) and the counterplate (13) that the lockbox housing (7) ) protrudes in addition to the fire protection plate (16) on at least two opposite sides, characterized in that the spacer (15) consists of a casing (23) and at least two abutment surfaces (22) fixedly connected to the casing (23) with spacing, with the sheath (23) projecting on both sides of the abutment surfaces (22), the spacer (15) fixing the parallel glass washers (4, 5) at the distance predetermined by the abutment surfaces (22).

Closure device according to claim 1, characterized in that the hollow spacer (15) consists of plastic or metal, in particular of metal coated with plastic.

Closure device according to claim 1 or 2, characterized in that the closure device (1) has at least two hollow spacers (15).

Closing device according to one of the preceding claims, characterized in that the locking box housing (7) and / or the counter plate (13) on the facing surface each time has a damping element (25).

Closure device according to one of the preceding claims, characterized in that the fixing means (14) is a screw.

A closure device according to one of the preceding claims, characterized in that the fire protection plate (16) has at least one opening (18) for carrying a push button square (10).

A closure device according to one of the preceding claims, characterized in that the fire protection plate has at least one opening (19) for inserting a closing cylinder (12).

Closure device according to one of the preceding claims, characterized in that the mineral fire protection plate (16) consists of sintered, pressed material, especially of a silicate material.

Closure device according to one of the preceding claims, characterized in that the fire protection plate (16) is shaped as far as possible rectangular or square.

Closure device according to one of the preceding claims, characterized in that the fire protection plate (16) has a thickness at least equal to the thickness of the glass portion (3).

Closure device according to claim 10, characterized in that the fire protection plate (16) on at least one of its impact edges (30) facing the spacer glass (4, 5) has a spring-like profile. wherein the thickness of the fire protection plate (16) in the area of the springy profile corresponds at most to the inner distance from each other of the spacers (4, 5) spaced apart.

Closure device according to one of claims 1 to 9, characterized in that the fire protection plate (16) has a thickness which corresponds at most to the inner distance from each other of the spacers (4, 5) spaced apart and each side of this fire protection plate (16) is each time applied to a further fire protection plate (28, 29), each having a thickness approximately equal to or greater than the thickness of the glass disks (4, 5).

Locking device for a closing device (1) according to one of the preceding claims for attachment to a fire protection element, in particular in the form of a fire protection wall element, a fire protection door or a fire protection window, with a glass part (3) of at least two glass washers (4) 5) arranged parallel to a spacing, wherein the locking latch assembly comprises at least: - a locking latch housing, in which a latching latch is inserted and secured, in particular for mounting on the glass portion of the fire protection element, - at least one hollow spacer (15), wherein the locking latch housing is connected to the counterplate via at least one fixative (14) passed through the spacer (15), characterized in that the spacer (15) consists of a sleeve (23) and at least two abutment surfaces (22) fixedly connected to the sheath (23), spaced parallel to the distance with the sheath (23) projecting on both sides; of the abutment surfaces (22), the spacer (15) fixing the parallel glass washers (4, 5) at the distance predetermined by the abutment surfaces (22).

A fire protection element, in particular in the form of a fixed fire protective glass portion, a fire protection door or a fire protection window, with a glass portion (3) of at least two glass washers (4, 5) spaced parallel to the distance where the glass portion (3) of a side edge is provided with a locking latch device according to claim 13.

15. Swivel and / or tiltable fire protection element (2), in particular in the form of a fire protection door or a fire protection window, with a glass portion (3) of at least two glass washers (4, 5) arranged parallel to the distance where the glass portion (3) is provided on a side edge with a recess (17), in which a closing device (1) according to one of claims 1 to 12 is inserted such that the fire protection plate (16) of the closing device (1) is inserted in the recess (17), and the sleeve-like spacer (15) of the closure device (1) between the glass disks (4, 5).

Fire protection element according to claim 15, characterized in that the recess (17) has the shape of the fire protection plate (16).

Fire protection element according to claim 15 or 16, characterized in that the glass portion (3) has an inner, circumferential spacer profile (6) spaced on the rim side.

Fire protection element according to one of claims 15 to 17, characterized in that the spacer (15) is connected to the glass disks (4, 5) via a filling material (24).

Fire protection element according to one of claims 15 to 18, characterized in that the spacer (15) consists of a casing (23) and at least two abutment surfaces (22) fixedly connected to the casing (23), spaced apart. wherein the sheath (23) protrudes on both sides of the abutment faces (22) and the respective portions of the sheath (23) protruding over the abutment faces (22) have a length equal to or greater than that of the glass disks (4). 5) thickness.

Fire protection element according to one of claims 15 to 19, characterized in that the space between the glass disks (4, 5) is filled with a gas, a liquid or a gel, in particular a fire protective gel (26).

Fire protection element according to one of claims 15 to 20, characterized in that at least one of the glass washers (4, 5) consists of safety glass, in particular of tempered glass.

Fire protection element according to one of claims 15 to 21, characterized in that the glass discs (4, 5) have a disc thickness of 1 to 15 mm independently of one another.

Fire protection element according to one of claims 15 to 22, characterized in that the glass washers (4, 5) have a distance of 5 to 50 mm.

Fire protection element according to one of claims 15 to 23, characterized in that the fire protection element (2) is designed framelessly.