EP3974612B1 - Burglar-inhibiting assembly - Google Patents

Description

The present invention relates to an arrangement comprising a core wall with a window or door recess, a window or door frame inserted into the window or door recess and an attachment system for a movable front window or front door device such as roller shutters, external venetian blinds, etc. with a core wall on the inside inserted, attached to the core wall and to the window or door frame and the window or front door device designed to be durable, with an outer cover connected to the outside of the core wall, which comprises at least one reinforcement layer made of a high-strength material, and with fastening elements, with which at least the reinforcement sheet is attached to the core wall, the reinforcement sheet being bonded to the core wall by the fasteners along its upper edge portion and both side edge portions. 299 14 901 U1 discloses an arrangement according to the preamble of claim 1.

Such an arrangement has already been used in prefabricated house construction in the past. The main purpose of the reinforcement layer was to gain space for the sectional arrangement of the window or door equipment in the outer cover. In the case of prefabricated houses made of wood, the individual wall elements have also been manufactured lying down in some cases, with roller shutter boxes with roller shutters being integrated in the area of the windows and/or doors. For production reasons, the flat-lying wall elements had to be accessible to the production staff. Sufficient stability had to be available for this accessibility, especially in the area of the outer covers of roller shutter boxes. Therefore, a reinforcement layer made of a high-strength material was used. There were variants in which the reinforcement layer was screwed to a squared timber construction that was arranged in front of the core wall, or there were variants in which the screw connection took place directly with the core wall. Innovations in production technology and the increase in the insulation thickness of external paneling have pushed such constructions further and further back.

A completely different topic with such arrangements is the anti-burglary design. Until now, roller shutter boxes that were inserted directly into the window or door recesses were avoided if particularly good burglary-resistant properties were required. Instead, arrangements were used that were placed on the outside of the core wall, so that the core wall itself represented the actual burglary protection for the roller shutter box.

1. A) die Verstärkungslage weist eine Festigkeit auf, die bei einer Fenster- oder Türrahmenbreite von bis zu 1,50 m mindestens 90 % der Festigkeit eines 0,88 mm starken Stahlbleches in identischer Umfangskontur der Verstärkungslage entspricht und bei einer Fenster- oder Türrahmenbreite von über 1,50 m mindestens 80% der Festigkeit eines 1,5 mm starken Stahlbleches in identischer Umfangskontur der Verstärkungslage entspricht, und
2. B) die Befestigungselemente, mit denen die Verstärkungslage an der Kernwand befestigt sind, mindestens in einer Anzahl Y vorhanden sind, wobei sich Y aus der Formel $$Y=\frac{L_0\cdot \mathit{mm}}{6\cdot {\left(Z_P\right)}^2}+\frac{\left(L_{S1}+L_{S2}\right)\cdot \mathit{mm}}{2\cdot {\left(Z_P\right)}^2}-4$$
   
   ergibt,
   • der Abstand der Befestigungselemente am oberen Kantenbereich der Verstärkungslage maximal 400mm beträgt, und
   • Lo der Länge des oberen Kantenbereichs der Verstärkungslage in mm,
   • L_S1 der Länge des ersten Seitenkantenbereichs der Verstärkungslage in mm,
   • L_S2 der Länge des zweiten Seitenkantenbereichs der Verstärkungslage in mm und
   • Zp des für die Zugfestigkeit maßgeblichen geometrischen Parameters wie Nenndurchmesser etc. der Befestigungselemente, mit denen die Verstärkungslage an der Kernwand befestigt ist, in mm entspricht, und
   zusätzlich zumindest eine der folgenden Bedingungen erfüllt sein kann:
   • C) zumindest einige der Befestigungselemente, mit denen die Verstärkungslage an der Kernwand befestigt ist, weisen eine Verankerungstiefe in der Kernwand von mindestens dem 3 x a-fachen des für die Festigkeit maßgeblichen geometrischen Parameters wie Nenndurchmesser etc. des Befestigungselementes auf, wobei a für ein Kernwandmaterial wie Beton 1,0, für ein Kernwandmaterial wie Kalksandstein oder Vollziegel 2,0 und für ein Kernwandmaterial wie Bims, Leichtbeton oder Nadelholz 2,4 beträgt, und
   • D) die Befestigungselemente die Verstärkungslage für einen Wärmedehnungsausgleich schwimmend befestigen.

It is therefore the object of the present invention to provide an improved generic An-Die The object is achieved according to the invention in that a burglar-resistant outer cover is provided, in which at least the following conditions are met:

1. A) the reinforcement layer has a strength which, with a window or door frame width of up to 1.50 m, corresponds to at least 90% of the strength of a 0.88 mm thick steel sheet with an identical peripheral contour of the reinforcement layer and with a window or door frame width of over 1.50 m corresponds to at least 80% of the strength of a 1.5 mm thick steel sheet with an identical peripheral contour of the reinforcement layer, and
2. B) the fastening elements with which the reinforcement layers are fastened to the core wall are present in at least a number Y, where Y is derived from the formula $$Y=\frac{L_0\cdot \mathit{mm}}{6\cdot {\left(Z_P\right)}^2}+\frac{\left(L_{S1}+L_{S2}\right)\cdot \mathit{mm}}{2\cdot {\left(Z_P\right)}^2}-4$$
   
   results
   • the distance between the fasteners at the upper edge area of the reinforcement layer is a maximum of 400mm, and
   • Lo is the length of the upper edge area of the reinforcement layer in mm,
   • L _S1 is the length of the first side edge area of the reinforcement layer in mm,
   • L _S2 is the length of the second side edge area of the reinforcement layer in mm and
   • Zp corresponds to the geometric parameter relevant for the tensile strength, such as the nominal diameter etc. of the fastening elements, with which the reinforcement layer is fastened to the core wall, in mm, and
   in addition, at least one of the following conditions can be met:
   • C) at least some of the fastening elements, with which the reinforcement layer is fastened to the core wall, have an anchorage depth in the core wall of at least 3 x a times the geometric parameter decisive for strength Nominal diameter etc. of the fastening element, where a is 1.0 for a core wall material such as concrete, 2.0 for a core wall material such as sand-lime brick or solid brick and 2.4 for a core wall material such as pumice, lightweight concrete or softwood, and
   • D) the fastening elements fix the reinforcement layer floating to compensate for thermal expansion.

The arrangement according to the invention is intended to be used to install the usual front window or front door devices that can normally be opened and closed in front of windows or doors. In addition to roller shutters, venetian blinds (venetian blinds), this also includes textile screens and insect protection measures. Because these devices move in front of the windows or doors, a sufficient space, a so-called functional space, must be created in front of the core wall, which is covered by the outer covering. According to the invention, this outer cover is designed as a burglary-resistant outer cover, i.e. it must correspond to at least RC class 2. In order to fulfill this requirement, it fulfills at least the specified conditions A) and B) and optionally C) and/or D). The window and the window frame or the door and the door frame should have at least the same or a higher RC class, i.e. they should also be sufficiently burglar-resistant. In this regard, reference is made to DIN EN 1627: Doors, windows, curtain walls, lattice elements and closures - burglary resistance - requirements and classification. When examining such an arrangement, it is determined whether a passable opening through which the prescribed templates can be pushed has arisen within a certain period of time under the influence of specified burglary tools.

Using a suitably thick sheet of steel (or equivalent) means that burglars will have a great deal of trouble prying open the outer covering. The reinforcement layer must therefore not only ensure a cover that can be subjected to wind loads or absorb simple forces when walked on, but must also have sufficient stability against the effects of violence and be designed to be correspondingly more resistant. A galvanized steel sheet with the type designation DX51D+Z (St02Z) can preferably be assumed as the comparison steel sheet. A further condition is aimed at the tensile strength of the fastening elements and the associated number of fastening elements to be used for arranging the reinforcement layer in order to achieve sufficient burglary resistance. If fastening elements with different Zp are to be used, an average value must be formed and the respective percentage in the formula must be taken into account. ie to approximate iteratively. The maximum distance between the fastening elements at the upper edge area ensures in particular that a burglar with a burglary tool (e.g. sturdy screwdriver, crowbar, etc.) cannot easily pry under the reinforcement layer. Optionally, the minimum number of fasteners can be increased by 2. Optionally, the fastening elements should be anchored deep enough in the core wall so that even violent forces do not result in the fastening elements being torn out of the core wall or tearing out is not possible so quickly. The core wall materials specified are intended to represent the usual range of core wall materials that can be used, but without being restrictive. If necessary, intermediate values must be interpolated depending on and the classification of a core wall material not mentioned here.

Previously used reinforcements, which were not used for burglary protection but for wind load absorption and/or step resistance, were already used for window or door recesses. Window or door recesses are also increasingly being used to arrange large window and door fronts. This requires correspondingly large external covers. Especially when using reinforcement layers that have a different thermal expansion behavior compared to the other materials, e.g. wood, and with regard to a burglary-resistant fastening of the reinforcement layer to the core wall, one condition is that the fastening elements fasten the reinforcement layer floating to compensate for thermal expansion. A floating attachment is understood to mean an attachment which, at least within certain limits, allows the elements to be connected to one another or the attachment element to be displaced. In particular, the usual temperature ranges relevant to house construction should be considered. The floating mounting ensures in particular that the attachment of the fasteners in the core wall is not damaged. The reinforcement layer should also be attached with as little or no stress as possible, without internal stresses occurring in the reinforcement layer or the fastening elements as a result of thermal expansion. However, this measure also serves to protect against burglary, because the floating attachment ensures that the forces applied during an attempted break-in are distributed over a number of attachment elements, and the load occurring on one attachment element is therefore reduced. Some of the stress may also be accommodated by the movement and/or deformation of the floating reinforcement sheet.

Of course, the measures resulting from these conditions are mutually reinforcing. Advantageously, the window frame and the window with the same or a higher burglary class, such as the outer covering or the attachment system. The reinforcement layer can also be multi-layered and optionally comprise different materials.

The core wall is the actual section that is decisive for the load-bearing capacity of the corresponding wall. The core wall can be made of a wide variety of materials that provide the desired load-bearing capacity. Correspondingly reinforced supports (lintels) can also be used above window and door openings.

The window or door frame width means the width between the outer vertical frame profiles that is decisive for the length of the upper edge area of the reinforcement layer, which in most cases corresponds approximately to the length of the window or wall recess. Accordingly, vertical frame profiles can still be arranged in between, particularly in the case of large windows and doors.

The term "circumferential contour" is intended to include all outside and inside contours or outside and inside dimensions of the reinforcing layer, except for thickness. Accordingly, a comparison should be made with a twin made of sheet metal of a certain sheet thickness.

One variant favorably provides that, according to condition A), the reinforcement layer is a steel sheet with a sheet thickness of at least 0.88 mm and preferably has a reinforcing fold on its lower edge region pointing towards the core wall. Here, edging means a shaping in the steel sheet that increases the stability of the lower edge area. The result of this is that the lower edge area, which for the most part is not connected to the core wall, cannot be bent up so easily because a corresponding shape acts as a reinforcement.

The outer cover can preferably have a thermal insulation layer which is attached to the reinforcement layer on the outside and is preferably held by a holding device attached to the reinforcement layer or molded onto it. This can involve additional holding means or a molding onto the reinforcement layer. If a sheet steel is used, the lower edge area can be shaped in such a way that the folded edge forms both a reinforcement and the holding device at the same time. For example, the configuration of a holding device in the form of a channel or rail which is open at the top and on which the thermal insulation layer is seated is favorable. As a result, the lower edge area of the thermal insulation layer is also protected by the holding device.

A further embodiment provides that, according to condition D), the fastening elements are assembly screws with a head that provides an effective holding diameter that corresponds to at least 1.25 times, preferably at least 1.5 times, Z _P , and that the head is at a distance from the reinforcement layer or the fastening means bear against the reinforcement layer with such a small force or with the interposition of a thermal expansion compensation device that a floating fastening of the reinforcement layer is ensured. Mounting screws provide a very simple type of attachment, by means of which a floating attachment of the reinforcement layer is also very easily possible. A very simple design of such a floating attachment can be produced, for example, by tightening the assembly screws with a certain torque, so that the head presses with its base on the reinforcement layer. The mounting screw is then turned back by a specific angular amount. Depending on the pitch of the mounting screws, a desired distance or a desired loosening then inevitably results. An associated screw opening in the reinforcement layer then preferably has a slightly larger diameter than the nominal diameter of the assembly screw, so that a displacement caused by thermal expansion is possible. However, different types of compensation devices can also be used between the screw head and the reinforcement layer. For example, shims made of a suitable elastomeric material can be used, which ensure movement between the screw head and the reinforcing layer within the scope of its elasticity.

An essential aspect is sufficient strength of the fastening elements. According to one variant, it is provided that with regard to condition B) and/or C), the fastening elements have a Z _P of at least 7.5 mm. This ensures that the fastening elements already provide a suitable level of strength, which is conducive to burglary resistance.

According to one embodiment, a further measure for increasing burglary resistance is that the fastening elements have a smaller distance from one another in the area of the corner transitions from the upper edge area to the first and to the second side edge area than in their respective central sections. In these corner sections in particular, large bending forces can occur when attempting to pry open the reinforcement layer. Fastening elements can also be placed closer together in the lower section of the first and second side edge areas, so that the reinforcement layer does not detach from the core wall so quickly in the lower area.

Preferably, the outer cover can have a spacer strip along the upper edge area and the first and second side edge area, facing the core wall, through which the fastening elements penetrate, preferably in the middle. This spacer bar therefore fulfills several tasks. On the one hand, it creates a desirable distance between the reinforcement layer and the core wall and, on the other hand, forces from the reinforcement layer are not introduced directly into the core wall via an attempted break-in, but only indirectly with the interposition of the spacer bar and the fastening elements. The spacer strip thus serves to protect the core wall and can also absorb deformation energy without the fastening of the fastening elements in the core wall being permanently affected.

According to a preferred embodiment, it has proven useful if the fastening elements are spacer assembly screws, eg Würth spacer assembly screws ^Amo® III 7.5 TYPE 3 button head with a tensile strength of over 800 N/mm ² . Spacer assembly screws are of particular advantage because they have been structurally tested and clearly assigned to a specific quality class. They therefore generally withstand higher tensile forces than other comparable assembly screws that are often used, for example in timber construction. Existing screw grades can therefore be used without having to carry out your own development. Spacer assembly screws are made of high-quality material and are readily available to the appropriate fitter because they are inevitably used in door and window construction. Another advantage is that these can be anchored into the core wall without using a dowel. Spacer assembly screws are also usually very long screws, which can easily have the right length as part of the range for the intended purpose here.

According to one variant, it has proven to be advantageous if the spacer bar or bars is or are formed by a base element whose strength corresponds to at least 70% of the strength of a solid squared timber made of softwood which is identical in the exceptional measurements and which has a width dimension such in order to create a sufficient functional space in front of the core wall for the mobile front window or front door device. In an advantageous variant, such a solid squared timber can be used as the base element. This gives the reinforcement layer its desired distance from the core wall, so that a sufficiently large functional space can be generated, and on the other hand, this also achieves a stable support for the reinforcement layer along the associated edge regions. In addition, such an embodiment is generally inexpensive. Important is, that for the spacer strip or strips consist of an elastic but not too brittle and not too soft material.

There is also the possibility that the support device has a burglary-resistant panel that closes at least 50% of the gap in the window or door opening between the window or door frame and the core wall, the strength of which is at least 80% that of an OSB panel corresponds to an identical peripheral contour if the burglar-resistant panel is arranged closer to the inside of the core wall than to the outside of the core wall, with the thickness of the comparable OSB panel being at least 8 mm, preferably at least 10 mm, or its strength being at least 80% of the strength corresponds to a multiplex panel with an identical peripheral contour if the burglar-resistant panel is arranged closer to the outside of the core wall than to the inside of the core wall and the thickness of a comparable multiplex panel is at least 10 mm, preferably at least 12 mm. This gives the arrangement an additional burglary-resistant measure, the effect of which unfolds as soon as the burglar-resistant outer covering has been breached. Here, according to the definition, it is advantageous that the plate is stronger the closer it is arranged towards the outside of the core wall. OSB panels, also known as coarse chipboard, are wood-based materials that are made from long, slender chips. OSB boards are available in different qualities. The dimension can also be reduced in accordance with a higher quality. A type OSB 3 can preferably be assumed as the comparison OSB panel.

A multiplex board (also called multi-layer board, e.g. birch plywood or SD board) is a multi-layer wooden board, with an SD board also coated on both sides with phenolic resin. A birch plywood (F/F) (BFU100) according to DIN 68705-3 can preferably be assumed as a comparison multiplex board.

Adequate anchoring of the anti-burglary panel to the core wall should be ensured so that prying through towards the inside of the core wall is greatly inhibited.

The term "circumferential contour" is intended to include all external and internal contours or external and internal dimensions of the burglar-resistant panel other than thickness. Accordingly, a comparison should be made with a twin made of an OSB or multiplex board of a certain strength (thickness).

ergibt,

• der Abstand der Befestigungselemente am oberen Kantenbereich der einbruchshemmenden Platte maximal 350 mm beträgt, und
• L_OP der Länge des oberen Kantenbereichs der maßgeblichen Anbringung der einbruchshemmenden Platte an der Kernwand in mm,
• L_S1P der Länge des ersten Seitenkantenbereichs der maßgeblichen Anbringung der einbruchshemmenden Platte an der Kernwand in mm,
• L_S2P der Länge des zweiten Seitenkantenbereichs der maßgeblichen Anbringung der einbruchshemmenden Platte an der Kernwand in mm, und
• Z_PP des für die Zugfestigkeit maßgeblichen geometrischen Parameters wie Nenndurchmesser etc. der Befestigungselemente, mit denen die einbruchshemmende Platte an der Kernwand befestigt ist, in mm entspricht und

zusätzlich zumindest die folgende Bedingung erfüllt sein kann:
F) zumindest einige der, bevorzugt sämtliche, Befestigungselemente weisen eine Verankerungstiefe in der Kernwand von mindestens des 3 x a-fachen des für die Zugfestigkeit maßgeblichen geometrischen Parameters wie Nenndurchmesser etc. des Befestigungselementes auf, wobei a für ein Kernwandmaterial wie Beton 1,0, für ein Kernwandmaterial wie Kalksandstein oder Vollziegel 2,0 und für ein Kernwandmaterial wie Bims, Leichtbeton oder Nadelholz 2,4 beträgt.The burglar-resistant panel can preferably be connected directly or indirectly to the core wall, preferably on the inside of the core wall, by means of fastening elements, with at least the following condition for fastening the burglar-resistant panel being met:
E) the fastening elements are present in at least a number Y _P , where Y _P is derived from the formula $$Y_P=\frac{L_0\cdot \mathit{mm}}{6\cdot {\left(Z_{\mathit{pp}}\right)}^2}+\frac{\left(L_{S1}+L_{S2}\right)\cdot \mathit{mm}}{2\cdot {\left(Z_{\mathit{pp}}\right)}^2}-2$$

results

• the distance between the fastening elements at the upper edge area of the anti-burglary panel is a maximum of 350 mm, and
• L _OP is the length in mm of the upper edge area of the relevant attachment of the burglar-resistant panel to the core wall,
• L _S1P is the length of the first side edge area of the relevant attachment of the burglar resistant panel to the core wall in mm,
• L _{S2P is} the length in mm of the second side edge area of the relevant attachment of the burglar-resistant panel to the core wall, and
• Z _PP corresponds to the geometric parameter relevant for the tensile strength, such as the nominal diameter etc. of the fastening elements, with which the burglar-resistant panel is fastened to the core wall, in mm and

in addition, at least the following condition can be met:
F) at least some of the, preferably all, fastening elements have an anchorage depth in the core wall of at least 3 x a times the geometric parameter relevant for the tensile strength, such as nominal diameter etc. of the fastening element, where a for a core wall material such as concrete is 1.0, is 2.0 for a core wall material such as sand-lime brick or solid brick and 2.4 for a core wall material such as pumice, lightweight concrete or softwood.

This ensures good anchoring of the burglar-resistant panel on the core wall. Here, too, the use of fastening elements with different Zpp can be taken into account. An average must then be formed and the percentage in the formula must be taken into account, i.e. approximated iteratively.

In combination, these measures naturally reinforce each other.

• G) der untere Kantenbereich der einbruchshemmenden Platte weist einen vertikalen (in Abhängigkeit der Einbaulage des Fenster- oder Türrahmens) Abstand zum Fenster- oder Türrahmen auf,
• H) die Kastenkonstruktion weist eine an der Oberseite des Fenster- oder Türrahmens entlang geführte, mit dem Fenster- oder Türrahmen verbundene einbruchshemmende Bodenleiste auf, deren Festigkeit mindestens 80 % der Festigkeit einer Multiplexplatte identischer Umfangskontur entspricht, wobei die Dicke der vergleichbaren Multiplexplatte mindestens 8 mm, bevorzugt mindestens 10 mm, beträgt, und
• I) bei Erfüllen von H) eine Revisionslücke zur Entnahme der Vorfenster- oder Vortüreinrichtung zwischen der einbruchshemmenden Platte und der einbruchshemmenden Bodenleiste verbleibt, die mittels einer Abdeckplatte oder Abdeckplatten verschlossen ist, die bzw. von denen zumindest eine als lösbare Deckelplatte ausgestaltet ist und wobei die lichte Weite der Revisionslücke maximal 150 mm, bevorzugt maximal 120 mm, beträgt.

According to a further embodiment, the support device can be designed as a box construction that can be inserted from the inside of the core wall, with the burglar-resistant panel being a vertical wall (i.e. usually parallel to the window or Door pane) of this box construction is designed, in or on which the fastening elements of the front window or front door device are anchored. The burglary-resistant panel thus takes over the attachment function for the window or front door device at the same time, and is of course designed to be sufficiently stable for this purpose. The burglary-resistant panel can preferably be supported on other components, for example on side walls of the construction, so that it is very difficult to pierce the burglar-resistant panel when an external force is applied. According to another embodiment, which is particularly suitable for attaching roller shutters, the support device can be designed as an open box construction that can be inserted from the inside of the core wall, with the burglar-resistant panel as a cover panel protruding over the gap with the upper, the first and the second edge area and is connected to the inside of the core wall by means of the fasteners, and at least one of the following conditions is met:

• G) the lower edge area of the burglary-resistant panel has a vertical distance (depending on the installation position of the window or door frame) to the window or door frame,
• H) the box construction has an anti-burglary bottom bar that runs along the top of the window or door frame and is connected to the window or door frame; , preferably at least 10 mm, and
• I) if H) is fulfilled, an inspection gap remains between the burglar-resistant panel and the burglar-resistant base strip for removing the front window or front door device, which is closed by means of a cover plate or cover plates, at least one of which is designed as a detachable cover plate and the clear width of the inspection gap is a maximum of 150 mm, preferably a maximum of 120 mm.

Most of the space in this box construction is used for arranging the roller shutter. so that the burglary-resistant panel is attached to the inside of the core wall from the gap and more or less as a cover panel and covers the gap to a large extent. So that an internal inspection of the roller shutter can take place, this burglary-resistant panel preferably ends at a certain vertical distance from the window or door frame. However, the distance should be selected in such a way that intrusion during an attempted break-in is avoided as far as possible. In addition, when using a multiplex panel, very good strength is provided, which represents a further obstacle to attempted break-ins. For aesthetic reasons, it is also advantageous if a remaining inspection gap is closed by one or more corresponding cover plates, with a detachable cover plate also being present in order to be able to carry out the inspection. The revision gap should preferably not exceed a certain size. The clear width here means the largest transverse extent of the gap. In particular, it should be prevented that people can penetrate through a correspondingly pried open gap. The term "circumferential contour" is intended to include all external and internal contours or external and internal dimensions of the burglar-resistant baseboard with the exception of thickness. Accordingly, a comparison should be made with a twin made of a multiplex panel of a certain strength (thickness),

Preferably, the detachable cover plate can have a length that is smaller than the width of the window or door recess minus the width of the reveal, and is designed in such a way that the movable window or front door device can be removed. Here it is advisable to include the reveal in the dimensioning of the cover plate, so that it can be opened undisturbed, but there is a sufficiently large inspection opening for removing the window or front door equipment.

1. A) die Verstärkungslage weist eine Festigkeit auf, die bei einer Fenster- oder Türrahmenbreite von bis zu 1,50 m mindestens 90 % der Festigkeit eines 0,88 mm starken Stahlblechs in identischer Umfangskontur der Verstärkungslage entspricht und bei einer Fenster- oder Türrahmenbreite von über 1,50m mindestens 80% der Festigkeit eines 1,5 mm starken Stahlbleches in identischer Umfangskontur der Verstärkungslage entspricht, und
2. B) die Befestigungselemente zum Anbringen der Verstärkungslage mindestens in einer Anzahl Y vorhanden sind, wobei sich Y aus der Formel $$Y=\frac{L_0\cdot \mathit{mm}}{6\cdot {\left(Z_P\right)}^2}+\frac{\left(L_{S1}+L_{S2}\right)\cdot \mathit{mm}}{2\cdot {\left(Z_P\right)}^2}-4$$
   
   ergibt und
   • der Abstand der Befestigungselemente am oberen Kantenbereich der Verstärkungslagemaximal 350mm beträgt, und
   • Lo der Länge des oberen Kantenbereichs der Verstärkungslage in mm,
   • L_S1 der Länge des ersten Seitenkantenbereichs der Verstärkungslage in mm,
   • L_S2 der Länge des zweiten Seitenkantenbereichs der Verstärkungslage in mm und
   • Z_P des für die Zugfestigkeit maßgeblichen geometrischen Parameters wie Nenndurchmesser etc. der Befestigungselemente, mit denen die Verstärkungslage an der Kernwand befestigt ist, in mm entspricht, und
   zusätzlich mindestens eine der folgenden Bedingungen erfüllt sein kann:
   • C) zumindest einige der Befestigungselemente weisen eine Verankerungstiefe für die Kernwand von mindestens dem 3 x a-fachen des für die Zugfestigkeit maßgeblichen geometrischen Parameters wie Nenndurchmesser etc. des Befestigungselementes auf, wobei a für ein Kernwandmaterial wie Beton 1,0, für ein Kernwandmaterial wie Kalksandstein oder Vollziegel 2,0 und für ein Kernwandmaterial wie Bims, Leichtbeton oder Nadelholz 2,4 beträgt, und
   • D) die Befestigungselemente für einen Wärmeausdehnungsgleich zum schwimmenden Anbringen der Verstärkungslage ausgestaltet sind.

Furthermore, the invention according to claim 15 relates to the use of an attachment system for a movable front window or front door device such as roller shutters, external venetian blinds, etc., in an arrangement according to one of claims 1 to 14, wherein the attachment system is one that can be inserted into a core wall on the inside the core wall and a window or door frame attachable and the front window or front door device holding support device, an outer cover connectable to the outside of the core wall, the at least one reinforcement layer of a high-strength material, and has fastening elements for attaching at least the reinforcement layer to the core wall, wherein the reinforcement layer can be connected to the core wall by the fastening elements along its upper edge area and the two side edge areas, wherein the outer cover is designed as a burglar-resistant outer cover, in which at least the the following conditions are met:

1. A) the strength of the reinforcement layer corresponds to at least 90% of the strength of a 0.88 mm thick steel sheet with an identical peripheral contour of the reinforcement layer for a window or door frame width of up to 1.50 m and for a window or door frame width of over 1.50 m corresponds to at least 80% of the strength of a 1.5 mm thick sheet steel with the same peripheral contour of the reinforcement layer, and
2. B) the fastening elements for attaching the reinforcement layer are present in at least a number Y, where Y is derived from the formula $$Y=\frac{L_0\cdot \mathit{mm}}{6\cdot {\left(Z_P\right)}^2}+\frac{\left(L_{S1}+L_{S2}\right)\cdot \mathit{mm}}{2\cdot {\left(Z_P\right)}^2}-4$$
   
   yields and
   • the spacing of the fasteners at the upper edge portion of the reinforcement sheet is a maximum of 350mm, and
   • Lo is the length of the upper edge area of the reinforcement layer in mm,
   • L _S1 is the length of the first side edge area of the reinforcement layer in mm,
   • L _S2 is the length of the second side edge area of the reinforcement layer in mm and
   • Z _P corresponds to the geometric parameter relevant for the tensile strength, such as the nominal diameter etc. of the fastening elements, with which the reinforcement layer is fastened to the core wall, in mm, and
   in addition, at least one of the following conditions can be met:
   • C) at least some of the fastening elements have an anchorage depth for the core wall of at least 3 x a times the geometric parameter relevant for the tensile strength, such as the nominal diameter etc. of the fastening element, with a is 1.0 for a core wall material such as concrete, 2.0 for a core wall material such as sand-lime brick or solid brick and 2.4 for a core wall material such as pumice, lightweight concrete or softwood, and
   • D) the fasteners are designed for equal thermal expansion for floating attachment of the reinforcement layer.

Fig. 1

einen Ausschnitt einer ersten Ausführungsform einer erfindungsgemäßen Anordnung in einer Seitenansicht (Vollschnitt),

Fig. 2

die Anordnung aus Fig. 1 in einer geschnittenen Draufsicht, wobei zur Veranschaulichung der Fensterrahmen und das Fenster eingezeichnet sind,

Fig. 3

einen Ausschnitt einer zweite Ausführungsform einer erfindungsgemäßen Anordnung in einer Seitenansicht (Vollschnitt),

Fig. 4

die Anordnung aus Fig. 3 in einer geschnittenen Draufsicht, wobei zur Veranschaulichung der Fensterrahmen und das Fenster eingezeichnet sind und

Fig. 5

eine schematische Darstellung einer Lochanordnung einer Verstärkungslage.

Exemplary embodiments of the present invention are explained in more detail below with reference to drawings. Show it:

1

a section of a first embodiment of an arrangement according to the invention in a side view (full section),

2

the arrangement 1 in a sectional top view, with the window frame and the window drawn in for illustration purposes,

3

a section of a second embodiment of an arrangement according to the invention in a side view (full section),

4

the arrangement 3 in a sectional plan view, with the window frame and the window being drawn in for illustration and

figure 5

a schematic representation of a hole arrangement of a reinforcement layer.

In the 1 and 2 a first embodiment of an arrangement 1 is shown. The arrangement 1 essentially comprises a supporting core wall 2 in which a window recess 3 of rectangular cross-section is arranged, a window frame 4 inserted into the window recess 3 and an attachment system 5 for a roller shutter 6 inserted between the window frame 4 and the core wall 2. The roller shutter 6 is in 1 drawn only schematically in its rolled-up position in dot-dash line. The roller shutter 6 is wound onto a roller shutter shaft 7 . It is a motor-driven roller shutter 6. Therefore, the power cable leading to the motor 8 is drawn in dashed line.

In the present case, the core wall 2 is a wooden structure. The lintel area 9 is reinforced accordingly. The core wall 2 has gypsum fiber boards 10 on its outside A and gypsum fiber boards 11 on its inside I. The upper portion of the inner surface of the window recess 3 is formed by a gypsum fiber board 12 arranged on the core wall 2 .

The gypsum boards 10 on the outside A of the core wall 2 are in front of insulating boards 13 . The connection to the gypsum fiber boards 10 is usually made by means of an adhesive layer 14. A plaster layer 15 is applied to the insulation boards 13. The window frame 4 consists essentially of four hollow profiles connected at the corners, which are connected to the core wall 2 in the lower area of the window recess 3 and on the sides by means of spacer assembly screws. The attachment of such window frames 4 is well known and reference is made to the prior art in this regard. In the upper area of the window recess 3, however, there remains a gap 16 between the window recess 3 and the upper profile 4.1 of the window frame 4, into which at least one component of the attachment system 5 is inserted.

also in 1 a window 17 with double glazing is drawn in, which is pivotably hung in the window frame 4 . The window frame 4 and the window 17 have an increased burglary class (here RC3). On the window frame 4, that is, the vertical profiles 4.2 and 4.3 (see 2 ) a curtain rail 18.1 and 18.2 is attached, into which the lateral area of the roller shutter 6 can move and is guided there (see also 2 ). In 2 the reveal insulation and the window sill 20 on the outside A of the core wall 2 are also shown schematically. The reveal insulation 19.1 and 19.2 partially covers the profiles 4.2 and 4.3 of the window frame 4. These configurations are well known and will not be explained in more detail here.

The attachment system 5 includes an outer cover 21 and a support device 22, which is primarily used to accommodate and hold the roller shutter 6. The outer cover 21 has a spacer strip 26 facing the core wall 2 along its upper edge region 23 and along its first and second side edge regions 24 , 25 . The spacer strip 26 thus surrounds the upper area of the window opening 3 in a U-shape. The spacer bar 26 consists of three assembled base elements, each base element being formed from a solid square timber of softwood. In the present case, the solid squared timber has a cross-sectional dimension of 55 x 55 mm. The outer cover 21 also includes a reinforcement layer 27 made of sheet steel (here a galvanized sheet steel with the type designation DX51D+Z (St02Z)) with a sheet thickness of 1.5 mm. The sheet steel is fully galvanized to withstand the elements. At the lower end, the reinforcement layer 27 has an edge 28 which is adjoined by a support rail 29 . The edging 28 serves to reinforce the lower edge area of the reinforcement layer 27; in particular, this lower edge area is intended to become more flexurally stable as a result. The last component of the outer cover 21 is a thermal barrier layer 30, which is on the outside of the reinforcement layer 27 is guided along and rests on the support rail 29 and is positioned in the lower edge area of the support rail 29. In the upper section, the thermal insulation layer 30 has the same thickness as the insulation boards 13, so that it is brought up to the gypsum fiber board 10 above the spacer strip 26 with the interposition of the adhesive layer 14 and thus covers the spacer strip 26 on the front and top. The outer cover 21 is also provided with the plaster layer 15 after installation.

In addition to the selected sheet metal thickness, what is special about the outer cover 21 is that it is connected to the core wall 2 by means of fastening means 31 that are not shown in detail. The fasteners 31 are standoff mounting screws, nominally 7.5mm diameter and 132mm long. Würth spacer assembly screws Amo ^® III 7.5 TYPE 3 button head with a tensile strength of over 800 N/mm ² are used here. The reinforcing layer 27 has corresponding openings 32, as shown in the schematic drawing by way of example figure 5 are shown. Apertures 32 are approximately 1.5mm larger in diameter than the nominal diameter of fasteners 31. Standoff mounting screws have several advantages for the present application. On the one hand, they are required for window installation anyway and are kept in stock by the installers. On the other hand, they can be connected to and anchored in the core wall without the use of dowels. Furthermore, these screws have very good strength values.

The fastening elements 31 go both through the reinforcement layer 27 and through the spacer strip 26 (in the middle), the adhesive layer 14 and then penetrate the gypsum fiber boards 10 into the core wall 2 . Spacer assembly screws have a continuous thread, which creates a corresponding form fit with the individual elements. They have a high strength and are therefore more stable than most comparable screws. The head diameter of the standoff mounting screw mentioned here is 12.5 mm. In particular, the reinforcement layer 27 is attached in a floating manner, ie the screw heads remain at a small distance from the reinforcement layer 27, so that the reinforcement layer 27 can move accordingly under the effect of heat and remains stress-free. As a result, the fastening elements 31 do not receive any additional stresses from the reinforcement layer 27 due to the effect of heat. Other possibilities of a floating mounting consist in the use of a low contact pressure that does not impede such a relative displacement or in the use of special attachment systems that are interposed between the fastening elements 31 and the reinforcement layer 27 and allow a relative displacement. In the present case, the fastening elements 31 were tightened with a specified torque, so that they rest with their screw heads on the reinforcement layer 27 with a resulting force. The fasteners 31 were then rotated back a quarter turn (90°) to obtain the desired spacing for the floating attachment. As a result, the fastener 31 moved back by approximately 0.7 mm, depending on the thread pitch.

The outer cover 21 is designed as a burglary-resistant outer cover 21 due to the special design of the reinforcement layer 27 and the fastening elements 31 used. A considerable amount of force is required to deform or remove it from the core wall 2 in such a way that the area of the carrying device 22 can be accessed from the outside.

In addition to the special strength of the fastening elements 31, their anchoring depth in the core wall 2 is also decisive. Depending on the material used for the core wall 2 (here wood), in the present case it should be at least 7.2 times the nominal diameter of the fastening element 31 used here, ie at least 54 mm. In the present case, the value of the anchorage depth is approx. 60 mm. In addition, the number Y of the fastening elements 31 used also plays an important role. In the present case, the number Y is determined as follows. For this purpose, the dimensions of the reinforcement layer 27 are determined, namely the length (L _O ) of the upper edge area, the length (L _S1 ) of the first side edge area and the length (L _S2 ) of the second side edge area. The length of the side edge areas L _S1 and L _S2 are identical in the present case. Depending on the nominal diameter Zp, the minimum number Y of the fastening elements 31 is determined as follows: $$Y=\frac{L_0\cdot \mathit{mm}}{6\cdot {\left(Z_P\right)}^2}+\frac{\left(L_{S1}+L_{S2}\right)\cdot \mathit{mm}}{2\cdot {\left(Z_P\right)}^2}-4$$

In the present case, a window frame 4 with a width B of 1,500 mm was used. In the present case, the length L _O is 1,630 mm. In the present case, the lengths L _S1 and L _S2 are each 345 mm. When using spacer assembly screws with a nominal diameter Zp of 7.5 mm, this results in a minimum number Y of 6.96 (calculated), which results in 7 when rounded. In the specific case, eleven fastening means 31 were used, namely one fastening element 31 each near the corner regions, in each case additionally three fasteners 31 along the top edge portion 23 and three additional fasteners 31 along the first and second side edge portions 24 and 25. As schematically illustrated in FIG figure 5 As can be seen, the distances between the fastening elements 31 in the corner area of the reinforcement layer 27 are narrower than in relation to the respective other fastening elements 31. The openings 32 in the reinforcement layer 27 are adapted accordingly. The maximum distances for the fastening elements 31 on the upper edge area 23 were observed.

The carrying device 22 is designed as an open box construction that can be inserted from the inside I of the core wall 2 . The open side of the box construction points towards the outer cover 21 and serves to ensure that the roller shutter 6, which is partially arranged in the box construction, protrudes from the box construction so that it can run into the curtain rails 18.1 and 18.2. The carrying device 22 includes a cover plate 33 which is connected to two side walls 34 and 35 . On the side walls 34 and 35, the roller shutter shaft 7 is rotatably mounted. Furthermore, the support device 22 includes an anti-burglary base strip 36 on its underside. The anti-burglary base strip 36 consists of a multiplex board (here a birch plywood (F/F) (BFU100) according to DIN 68705-3) with a thickness of 15 mm and closes immediately laterally with the interposition of a seal 37 to the upper profile 4.1 of the window frame 4. With this profile 4.1, the burglar-resistant base strip 36 is screwed. Towards the inside I of the core wall 2, the burglary-resistant base strip 36 protrudes over the window frame 4 and slightly over the window 17 (applies to the middle area of the burglar-resistant base strip 36). Along the side walls 34 and 35, the burglary-resistant base strip 36 is even drawn inward to a flush finish with the side walls 34 and 35. This results in a recess in the central area of the burglar-resistant floor strip 36, which can be used for an internal inspection. Another important component of the support device 22 is a burglary-resistant plate 38 that covers or closes more than 50% of the gap 16 between the window recess 3 and the window frame 4 . The burglary-resistant panel 38 is designed in such a way that its upper edge area 47 and the first and second side edge areas 48 and 49 overlap the inner side I of the core wall 2 and are connected to it there by means of fastening elements 39 . Again, these are spacer mounting screws; but this time with a countersunk head (here Würth spacer assembly screws Amo ^® III 7.5 TYPE 3 countersunk with a tensile strength of over 800 N/mm ² ). In the present case, these fastening elements 39 have a nominal diameter Z _PP of 7.5 mm and a length of 82 mm, so that an anchoring depth in the core wall 2 of at least 54 mm according to FIG given formula for the core wall material present here is achieved. In the present case, the anchoring depth is 70 mm. The burglary-resistant board 38 is an OSB board (here type OSB 3) with a thickness of 12 mm. The length of the plate 38 is such that it ends at the vertical distance Av from the window frame 4 . This supports the possibility of an internal inspection, but without jeopardizing the burglar resistance. The arrangement is such that a clear width _WL is formed between the middle section of the burglar-resistant floor strip 36 and the lower edge of the burglar-resistant panel 38, which is approximately 105 mm in the present case. The vertical distance Av is 100 mm in the present case.

In the middle section, the burglary-resistant floor strip 36 is formed in a stepped manner on its inwardly pointing edge 40 . This is followed by a cover plate 41 made of plywood which has a complementary stepped edge area and which has the same thickness as the burglary-resistant base strip 36 . A gypsum fiber board 42 is arranged on the outside of the burglar-resistant panel 38 , which starts slightly lower than the burglar-resistant panel 38 and ends essentially flush with the upper side of the burglar-resistant base strip 36 and the cover panel 41 . The gypsum fiber board 42 is provided with a screw strip 43 on its lower edge, so that the cover plate 41 can be screwed to it, as a result of which an inspection opening can be opened and closed by means of the cover plate 41 . Inside the box construction there are still insulating elements 44.1, 44.2 and 44.3 that are adapted to the shape of the roller shutter 6. At least the insulating element 44.1 is designed to be removable, so that inspection is possible.

Following the gypsum fiber board 42 there is another gypsum fiber board 45 which covers the upper area and in particular the attachment points of the burglary-resistant board 38 . In the same way, gypsum fiber boards 45 are also laterally connected to the gypsum fiber board 42 and also cover the laterally protruding burglary-resistant board 38 and its attachment points to the core wall 2 . The gaps 46 between the cover plate 41 and the laterally continued sections of the burglary-resistant floor strip 36 are covered on the inside by means of an EPDM seal which is bonded to the burglar-resistant floor strip 36 on one side.

The number of fastening elements 39 used to attach the burglar-resistant plate 38, which is connected to the core wall 2 both at the upper edge area 47 and at its first and second side edge areas 48 and 49 by means of the fastening elements 39, is also important for sufficient burglary resistance . the The length (L _OP ) of the anti-burglary plate 38 is 1578 mm in the present case, the lengths (L _S1P and L _S2P ) are each 186 mm.

The associated formula results in a number Y _P for the fastening elements 39 of at least 6 (rounded). In the present case, nine fasteners 39 are used.

In the present case, a burglary-resistant class of RC3 can be achieved both with the outer cover 21 alone and in combination with the burglar-resistant base strip 36 and the burglar-resistant plate 38 . Correspondingly dimensioned and solid materials, as well as an anchoring adapted to a burglary-resistant situation using the respective fastening elements 31 and 39 make it possible to provide an arrangement according to the invention that closes a gap 16 between the window recess 3 and the window frame 4, and to bridge it in such a way that no there is a weak point that can be quickly overcome with regard to break-in attempts.

Based on 3 and 4 a second embodiment of the arrangement 1 according to the invention will now be explained. Only the essential differences from the previous exemplary embodiment will be discussed, and therefore the same reference numerals are used for parts that are structurally and functionally the same, and additional reference is made to the previous description.

The core wall 2 is constructed in a similar way, but is not provided with a gypsum fiber board on the inside of the window recess 3 . The lintel area 9 has a slightly different structure.

The outer cover 21 is constructed in a substantially similar manner. However, the reinforcement layer 27 lacks an inwardly protruding edge. The support rail 29 is formed onto the lower end without such an edge. Overall, the outer cover 21 has a slightly greater overall depth. For this purpose, the spacer bar 26 is wider. The basic elements of the spacer strip 26 have a cross-sectional dimension of 60×100 mm. The fasteners 31 used are made correspondingly longer. In this specific case, these are spacer assembly screws with a nominal diameter Z _P of 7.5 mm and a length of 182 mm. Again, a button head screw is used. The anchoring depth in the core wall 2 is therefore approximately 66 mm and thus corresponds to the specification for the core wall material wood. The thickness of the reinforcement layer 27 is 0.88 mm in the present case. A steel sheet is again used. Nine fasteners 31 are used to fasten the 1.5 m wide window frame 4 shown here, which corresponds to the minimum specification. The lengths L _S1 and L _S2 of the two side edge regions 24 and 25 of the reinforcement layer 27 are each 350 mm in the present case and the length Lo of the upper edge region 23 is 1640 mm in the present case.

The main difference, however, lies in the design of the support device 22, which in the present case serves to attach a venetian blind 50 as a front window device. The venetian blind 50 is arranged in the functional space F created between the support device 22 and the outer cover 21 . The venetian blind 50 is attached to the support device 22 by means of an angle rail 51. In the present case, the support device 22 is not designed for internal inspection, but the external venetian blind 50 can be inspected externally. Therefore, the support device 22 has a closed box construction. This essentially consists of a vertically arranged burglary-resistant plate 38, which in the present case forms the inner wall of the box construction and has dimensions such that it can be inserted into the gap 16 between the window recess 3 and the upper profile 4.1 of the window frame 4. The anti-burglary plate 38 thus moves closer to the outer cover 21 . A more stable material is therefore used for the burglary-resistant panel 38, namely a multiplex panel (here a birch plywood (F/F) (BFU100) according to DIN 68705-3) with a thickness of 15 mm. The height of the plate 38 is about 20 mm less than the height of the gap 16. The underside of the box structure of the support 22 is formed from an OSB board with a thickness of 15 mm. In order to ensure a good attachment of the angle rail 51, the upper side of the box construction is made of two superimposed OSB panels 53.1, 53.2, each with a thickness of 15 mm (however, one panel is sufficient for burglar resistance). There is a correspondingly good screw connection between the burglary-resistant panel 38 and the OSB panels 52, 53.1 and 53.2 lying above and below. On the inside, the box construction is formed by an OSB end panel 54, the dimensions of which are larger than the cross-sectional dimensions of the gap 16, so that it can be connected to the inside I of the core wall 2 at its upper edge area 47 and its lateral edge areas 48, 49. The anti-burglary panel 38 is thus attached to the core wall 2 indirectly by means of the remaining box construction, in particular the OSB end panel 54 . The box construction has two plate-shaped side walls 34, 35, each formed from a plywood plate having a thickness of 15 mm. The side walls 34, 35 are with the other panels connected to the box construction, protrude beyond the burglary-resistant plate 38 and laterally delimit the functional space F and end at a small distance (approx. 20 mm) in front of the reinforcement layer 27 and offer additional lateral protection. Fastening elements 39 are used for the indirect connection. In the present case, these are spacer mounting screws with a nominal diameter Z _PP of 7.5 mm and a length of 82 mm. It is therefore anchored in the core wall with a depth of approx. 60 mm. These screws have a countersunk head. So that the entire carrying device 22 is securely anchored in the gap 16, the specifications for the minimum number Y _P of the fastening elements 39 apply again. In the present case, the length L _S1P of the first side edge area and L _S2P of the second edge area of the end plate 54 is approx. 300 mm and the length L _OP of the end plate 54 is 1578 mm. In the present case, the number Y _P of the fastening elements 39 is 9 and thus corresponds to the minimum specification from the formula. The end panel 54 is screwed to the lower OSB panel 52 at the lower edge area. Furthermore, the lower OSB panel 52 is screwed to the upper profile 4.1 of the window frame 4, which also secures the support device 22 at this point. The carrying device 22 is covered with gypsum fiber boards 55 and 56 on its inside. The interior of the support device 22 is filled with an insulating material 57 .

Due to the arrangement chosen here, a burglary-resistant construction has again been achieved. Decisive here are the design and attachment of the outer cover 21 and the design and attachment of the support device 22, which each contribute to the burglar resistance.

Reference List

1

arrangement

2

core wall

3

window recess

4

window frames

4.1

upper profile

4.2

lateral profile

4.3

lateral profile

5

attachment system

6

roller shutter

7

shutter shaft

8th

power cord

9

fall area

10

gypsum fiber board

11

gypsum fiber board

12

gypsum fiber board

13

insulation board

14

adhesive layer

15

plaster layer

16

gap

17

window

18.1

curtain rail

18.2

curtain rail

19.1

soffit insulation

19.2

soffit insulation

20

windowsill

21

outer cover

22

carrying device

23

upper edge area

24

first side edge area

25

second side edge area

26

spacer bar

27

reinforcement layer

28

edge

29

support rail

30

thermal insulation layer

31

fastener

32

opening

33

cover plate

34

Side wall

35

Side wall

36

anti-burglary baseboard

37

poetry

38

anti-burglary plate

39

fasteners

40

edge

41

cover plate

42

gypsum fiber board

43

screw strip

44.1

insulating element

44.2

insulating element

44.3

insulating element

45

gypsum fiber board

46

gap

47

upper edge area

48

first side edge area

49

second side edge area

50

venetian blind

51

angle rail

52

OSB panel below

53.1

OSB panel above

53.2

OSB panel above

54

OSB end panel

55

gypsum fiber board

56

gypsum fiber board

57

insulating material

A

outside

B

window frame width

f

functional space

I

inside

AV

vertical distance

LO

Length of the upper edge area of the reinforcement layer

LOP

Length of the top edge area of the relevant attachment of the burglar resistant panel to the core wall

LS1

length of the first side edge portion of the reinforcing sheet

LS1P

Length of the first lateral edge area of the relevant attachment of the burglar resistant panel to the core wall

LS2

length of the second side edge portion of the reinforcing sheet

LS2P

Length of the first lateral edge area of the relevant attachment of the burglar resistant panel to the core wall

WL

clear expanse

Y

Number of fasteners outside

YP

Number of fasteners inside

Zp

Nominal diameter of fasteners outside

ZPP

Nominal diameter of fasteners inside

Claims (15)

1. An arrangement (1) comprising a core wall (2) with recesses (3) for a window or a door, a window frame or a door frame (4) fitted into the recesses (3) for a window or a door and a mounting system (5) for a movable installation in front of the window or the door such as roller shutters (6), external venetian blinds (50) etc., including a support device (22) fitted into the core wall (2) on the inside, attached to the core wall (2) and to the window frame or door frame (4) and adapted to hold the installation in front of the window or the door, an outer cover (21) connected to the outside (A) of the core wall (2) and comprising at least one reinforcing layer (27) made of a high-strength, tough material and fastening members (31) by means of which at least the reinforcing layer (27) is attached to the core wall (2), the reinforcing layer (27) being connected to the core wall (2) by means of the fastening members (31) along its upper edge (23) and the two side edges (24, 25), characterized in that a burglar-inhibiting outer cover (21) is provided which satisfies at least the following conditions:

   A) the reinforcing layer (27) has a strength which, for a width of the window frame or door frame of up to 1.50 m, corresponds to at least 90% of the strength of a 0.88 mm thick steel sheet with an identical contour of the reinforcing layer (27) and, for a width of the window frame or door frame of more than 1.50 m, corresponds to at least 80% of the strength of a 1.5 mm thick steel sheet with identical contour of the reinforcing layer, and

   B) the fastening members (31) by means of which the reinforcing layer (27) is fastened to the core wall (2) are present in at least a number Y, wherein Y is defined by the following formula: $$Y=\frac{L_0\cdot \mathit{mm}}{6\cdot {\left(Z_P\right)}^2}+\frac{\left(L_{S1}+L_{S2}\right)\cdot \mathit{mm}}{2\cdot {\left(Z_P\right)}^2}-4$$

   

   and the distance of the fastening members (31) at the upper edge (23) of the reinforcing layer (27) is at most 400 mm, and

   L_O is the length in mm of the upper edge (23) of the reinforcing layer (27),

   L_S1 is the length in mm of the first side edge (24) of the reinforcement layer (27),

   L_S2 is the length in mm of the second side edge (25) of the reinforcing layer (27), and

   Z_P is the geometrical parameter in mm relevant for the tensile strength, such as nominal diameter, etc., of the fastening members (31) by means of which the reinforcing layer (27) is fastened to the core wall (2), and

   at least one of the following conditions can be satisfied:

   C) at least some of the fastening members (31) by means of which the reinforcing layer (27) is fastened to the core wall (2) are anchored to the core wall (2) in a depth of at least (3-a) times the geometric parameter relevant for the tensile strength, such as nominal diameter (Z_P) etc., of the fastening member (31) wherein a is 1.0 when the core wall is for instance made of concrete, 2.0 when the core wall is for instance made of sand-lime brick or solid brick and 2.4 when the core wall is for instance made of pumice, lightweight concrete or softwood, and

   D) the reinforcing layer (27) is fastened by the fastening members (31) in a floating manner to compensate for thermal expansion.
2. The arrangement (1) according to claim 1, characterized in that in accordance with condition A) the reinforcing layer (27) is a steel sheet having a sheet thickness of at least 0.88 mm and preferably has a reinforcing upward web (28) facing the core wall (2) at its lower edge.
3. The arrangement (1) according to claims 1 or 2, characterized in that the outer cover (21) has a thermal insulation layer (30) which is attached to the outside of the reinforcing layer (27) and is preferably held by supporting means attached to the reinforcing layer (27) or formed thereon.
4. The arrangement (1) according to any one of claims 1 to 3, characterized in that in accordance with condition D) the fastening members (31) are mounting screws having a head providing an effective holding diameter which is at least 1.25 times, preferably at least 1.5 times, Z_p and that the head is spaced from the reinforcing layer (27) or the fastening members (31) bear against the reinforcing layer (27) with small enough force or with the interposition of means for compensating thermal expansion that floating attachment of the reinforcing layer (27) is ensured.
5. The arrangement (1) according to any one of claims 1 to 4, characterized in that in accordance with condition B) and/or C) the fastening members (31) have a dimension of Z_p of at least 7.5 mm.
6. The arrangement (1) according to any one of claims 1 to 5, characterized in that the fastening members (31) are more closely spaced at the corner-shaped transitions from the upper edge (23) to the first and the second side edges (24, 25) than at their respective middle portions.
7. The arrangement (1) according to any one of claims 1 to 6, characterized in that the outer cover (21) includes along the top edge and the first and second side edges a spacer strip (26) facing the core wall (2) and penetrated by the fastening members (31).
8. The arrangement (1) according to claim 7, characterized in that the fastening members (31) are spacing mounting screws.
9. The arrangement (1) according to claim 7 or claim 8, characterized in that the spacer strip (26) or bottom strips are formed by a base member, the strength of which corresponds to at least 70% of the strength of a squared timber of solid softwood having identical outer dimensions and the width dimension of which provides sufficient space (F) in front of the core wall (2) for operating the movable installation in front of the window or door.
10. The arrangement (1) according to any one of claims 1 to 9, characterized in that the support device (22) includes a burglar-inhibiting panel (38) closing at least 50% of a gap (16) of the window or door recess (3) between the window or door frame (4) and the core wall (2), the strength of which corresponds to at least 80% of the strength of an OSB board with an identical contour when the burglar-inhibiting panel (38) is arranged closer to the inner side (I) of the core wall (2) than to the outer side (A) of the core wall (2) wherein the thickness of the comparable OSB board is at least 8 mm, preferably at least 10 mm, or the strength of which corresponds to at least 80% of the strength of a multi-layer veneer plywood board with identical contour, if the burglar-inhibiting panel (38) is arranged closer to the outer side (A) of the core wall (2) than to the inner side (I) of the core wall (2), and wherein the thickness of a comparable multi-layer veneer plywood board is at least 10 mm, preferably at least 12 mm.
11. The arrangement (1) according to claim 10, characterized in that the burglar-impeding panel (38) is directly or indirectly connected to the core wall (2) by means of fastening members (39), preferably on the inside (I) of the core wall (2), and at least the following condition for fastening the burglar-impeding panel (38) is satisfied:
    E) the fastening members (39) are present in at least a number Y_P, wherein Y_P is defined by the following formula $$Y_P=\frac{L_0\cdot \mathit{mm}}{6\cdot {\left(Z_{\mathit{PP}}\right)}^2}+\frac{\left(L_{S1}+L_{S2}\right)\cdot \mathit{mm}}{2\cdot {\left(Z_{\mathit{PP}}\right)}^2}-2$$

    

    and the distance of the fastening members (39) at the upper edge (47) of the burglar-impeding panel (38) is at most 350 mm, and

    L_OP is the length in mm of the upper edge (47) over which the burglar-impeding panel (38) is substantially attached to the core wall (2),

    L_S1P is the length in mm of the first side edge (48) over which the burglar-impeding panel (38) is substantially attached to the core wall (2),

    L_S2P is the length in mm of the second side edge (49) over which the burglar-impeding panel (38) is substantially attached to the core wall (2), and

    Zpp is the geometrical parameter in mm relevant for the tensile strength, such as nominal diameter, etc., of the fastening members (31) by means of which the burglar-impeding panel (38) is fastened to the core wall (2), and

    additionally at least the following condition can be satisfied:
    F) at least some of the fastening members (39) are anchored to the core wall (2) in a depth of at least (3-a) times the geometric parameter relevant for the tensile strength, such as nominal diameter (Z_PA) etc., of the fastening member (39) wherein a is 1.0 when the core wall is for instance made of concrete, 2.0 when the core wall is for instance made of sand-lime brick or solid brick and 2.4 when the core wall is for instance made of pumice, lightweight concrete or softwood.
12. The arrangement (1) according to claims 10 or 11, characterized in that the supporting device (22) is designed as a box-like structure that can be fitted from the inner side (I) of the core wall (2) and the burglar-impeding panel (38) is designed as a vertical wall of this box-like structure arranged in the gap (16), preferably at level with the window frame or door frame (4), in which or on which wall the fastening members of the installation in front of the window or the door are anchored.
13. The arrangement (1) according to claims 10 or 11, characterized in that the supporting device (22) is designed as an open box-like structure that can be fitted from the inner side (I) of the core wall (2) and the burglar-impeding panel (38) as a covering plate spans the gap (16) with the upper, the first and the second side edges and is connected to the inner side (I) of the core wall (2) by means of the fastening members (39), and at least one of the following conditions is satisfied:

    G) the lower edge of the burglar-impeding panel (38) has a vertical distance (Av) to the window frame or door frame (4),

    H) the box-like structure includes a burglar-impeding bottom strip (36) guided along the upper side of the window frame or door frame (4) and connected to the window frame or door frame (4), the strength of which bottom strip corresponds to at least 80% of the strength of a multi-layer veneer plywood board with an identical outer contour, the thickness of the comparable multi-layer veneer plywood board being at least 8 mm, preferably at least 10 mm, and

    I) when H) is satisfied, an inspection opening for removing the installation in front of the window or the door remains between the burglar-impeding panel (38) and the burglar-impeding bottom strip (36), which opening is closed by means of at least one covering plate (41, 42), at least one of which is designed as a detachable covering plate (41), and wherein the inside width (WI) of the inspection opening is at most 150 mm, preferably at most 120 mm.
14. The arrangement (1) according to claim 13, characterized in that the detachable covering plate (41) has a length which is smaller than the width of the window or door recess (3) minus the width of a reveal, and is designed to allow removal of the movable installation in front of the window or the door.
15. Use of an attachment system (5) for a movable installation in front of a window or a door such as roller shutters (6), external venetian blinds (50) etc., wherein the attachment system (5) comprises a support device (22) that can be fitted on the inside into a core wall (2), can be attached to the core wall (2) and a window or door frame (4) and holds the installation in front of the window or the door, an outer cover (21) that can be connected to the outer side (A) of the core wall (2) and comprises at least one reinforcing layer (27) made of a high-strength, tough material, including fastening members (31) for attaching at least the reinforcing layer (27) to the core wall (2), wherein the reinforcing layer (27) can be connected to the core wall (2) along its upper edge (23) and the two side edges (24, 25) by means of the fastening members (31), and the outer cover (21) is formed as a burglar-impeding outer cover (21) which satisfies at least the following conditions:

    A) the reinforcing layer (27) has a strength which, for a width of the window frame or door frame of up to 1.50 m, corresponds to at least 90% of the strength of a 0.88 mm thick steel sheet with an identical contour of the reinforcing layer (27) and, for a width of the window frame or door frame of more than 1.50 m, corresponds to at least 80% of the strength of a 1.5 mm thick steel sheet with identical contour of the reinforcing layer, and

    B) the fastening members (31) by means of which the reinforcing layer (27) is fastened to the core wall (2) are present in at least a number Y, wherein Y is defined by the following formula $$Y=\frac{L_0\cdot \mathit{mm}}{6\cdot {\left(Z_P\right)}^2}+\frac{\left(L_{S1}+L_{S2}\right)\cdot \mathit{mm}}{2\cdot {\left(Z_P\right)}^2}-4$$

    

    and the distance of the fastening members (31) at the upper edge (23) of the reinforcing layer (27) is at most 400 mm, and

    L_O is the length of the upper edge (23) of the reinforcing layer (27) in mm,

    L_S1 is the length of the first side edge (24) of the reinforcement layer (27) in mm,

    L_S2 is the length of the second side edge (25) of the reinforcing layer (27) in mm, and

    Z_P is the geometrical parameter relevant for the tensile strength in mm, such as nominal diameter, etc., of the fastening members (31) by means of which the reinforcing layer (27) is fastened to the core wall (2), and

    at least one of the following conditions can be satisfied:

    C) at least some of the fastening members (31) are anchored to the core wall (2) in a depth of at least (3-a) times the geometric parameter relevant for the tensile strength, such as nominal diameter (Z_P) etc., of the fastening member (31) wherein a is 1.0 when the core wall is for instance made of concrete, 2.0 when the core wall is for instance made of sand-lime brick or solid brick and 2.4 when the core wall is for instance made of pumice, lightweight concrete or softwood, and

    D) the fastening members (31) are adapted for floating attachment of the reinforcing layer (27) to compensate for thermal expansion.

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