EP3489449B1 - Protective grating for building for subsequent placement in wall openings - Google Patents

Description

FIELD OF THE INVENTION

The present invention relates to an object protection grille for subsequent installation in wall openings

TECHNICAL BACKGROUND

Safety grilles for wall openings exist in a wide variety of designs.

However, for certain applications, for example for security grilles provided between two adjacent rooms, there is an additional requirement to be able to use the wall opening, for example for the passage of cables. Nevertheless, a passable cross-section must be kept as small as possible.

A security grid for such requirements is in the DE 10 2009 045 984 A1 described. Accordingly, pipes running transversely are provided within a building opening, which have through-openings for receiving a threaded rod crossing the respective pipe in the vertical direction. The threaded rod is locked relative to the pipe by a large number of nuts provided on the threaded rods. Furthermore, slats are placed on the threaded rods and also held in place by means of nuts provided on the threaded rods. However, due to the large number of loose parts or parts that have to be screwed together, this safety grille is associated with a high level of assembly work.

the DE 10 2015 211 702 A1 addresses this problem by using several frame profiles with multiple angles and a large number of recesses, into which the tubes can be inserted and secured in a form-fitting manner. However, due to the special shape of the frame profiles, this construction requires the individual parts to be custom-made.

the AU 19951 83A describes an object protection grille for retrofitting in wall openings, in particular for securing a remaining cross-section of a wall opening with cable bushing, with a first slat, with a second slat, which is arranged in a common plane at an angle to the first slat, with the first The slat has a first plug-in recess and the second slat has a second plug-in recess aligned opposite the first plug-in recess, so that the first and second slats can be plugged into one another, with a third plug-in recess being provided on at least one section of the slats, and with a wall connection element which has a plug-in section and a mounting portion attachable to a wall, wherein the mating portion includes a fourth mating recess. the AU 19951 83A thus describes a kit for forming a safety grille with two mutually orthogonal slats and a frame arranged all around. The slats are inserted into the frame via recesses. The frame can have holes so that the frame can be screwed to a wall.

the U.S. 2,991,707 A describes a ventilation grille with mutually orthogonal slats and a frame. The slats can be clamped into the frame and attached using other spring-loaded brackets.

SUMMARY OF THE INVENTION

Against this background, the present invention is based on the object of specifying an object protection grid that can be flexibly assembled from individual parts and easily retrofitted.

According to the invention, this object is achieved by a protective object grating with the features of claim 1.

Accordingly, it is provided:
A security grille for retrofitting in wall openings, in particular for securing a residual cross-section of a wall opening with a cable bushing, with a first slat, with a second slat, which is arranged in a common plane at an angle to the first slat, with the first slats have a first plug-in recess and the second slat has a second plug-in recess aligned opposite to the first plug-in recess, so that the first and second slats can be plugged into one another, with a third plug-in recess being provided on at least one end section of the slats, and with a wall connection element which has a plug-in section that can be inserted into the third plug-in recess and a fastening section that can be fastened to a wall, the plug-in section having a fourth plug-in recess and being designed in such a way that the lamellae are firmly fixed to the wall with a positive fit are legible.

The idea on which the present invention is based is to design a protective grating for objects with a plurality of individual slats that can be plugged together and wall connection elements that can be plugged into them at the ends. In this way, on the one hand, the geometry of plug-in recesses provided for plugging together is used for stiffening the grid itself. On the other hand, an object protection grille can be flexibly assembled from individual slats that can be selected and/or cut to length, possibly only at the installation site, with the slats being flexibly fastenable, in particular individually, to a wall having the wall opening.

It is conceivable to fasten only the second slat or, in the case of several second slats, the second slats to the wall and to fasten the first slat or, in the case of several first slats, the first slats in a form-fitting manner through the plug-in recesses therein to set. The wall can serve as a rear stop for the slats at the edge of the wall opening.

In a preferred embodiment, however, in particular to increase the resistance class, both the first and the second slat or, in the case of several slats, both the first and the second slat are fastened to the wall with a wall connection element. If the installation situation permits, a wall connection element is provided on both end sections of a slat. Due to the preferably individual attachment to the wall, the slats are set individually. However, a grouped attachment is also conceivable, for example two or more slats with a common wall connection element. However, no surrounding frame is provided.

In addition, the slats also hold each other in the respective crossing area, so that despite the comparatively simple mechanical structure, a very high burglary-inhibiting effect, for example in accordance with resistance class RC5, can advantageously be provided.

A lamella is to be understood, for example, as a flat profile. However, lamellae that are bent or curved once or multiple times are also conceivable.

An insertion recess is to be understood in particular as a recess running in the transverse direction or at least obliquely to the longitudinal direction of the lamella, which extends continuously from one edge of the lamella, preferably over the entire thickness, but not over the entire width of the lamella. For example, the plug-in recess can extend over half the width to a middle of the lamella. A first and a second lamella can thus be plugged into one another without protruding.

While the first and the second plug-in recess preferably complement each other, the third plug-in recess can be designed differently. In particular, it is designed to be adapted to the wall connection element or matched to it. In particular, the third plug-in recess has a smaller depth in comparison to the first or second plug-in recess.

In one embodiment, the first and second slats or all crossing slats can be arranged, at least essentially, perpendicularly to one another. However, other configurations are also possible, so that, for example, slats running obliquely or also, at least in sections, roundly are possible.

Such an object protection grille according to the present invention can be produced, for example, with a method for the subsequent installation of an object protection grille, with the following steps: arranging a first slat, which has a first plug-in recess, and a second slat, which has a second plug-in recess, in a common plane crosswise, the first and second plug-in recesses being plugged into one another in a crossing area; Inserting a plug-in section of a wall connection element into a third plug-in recess provided on at least one end section of at least one of the first and second slats; and fastening a fastening section of the wall connection element to a wall in such a way that the slats are thus fixed in a form-fitting manner on the wall.

Of course, the method can be supplemented with all features of the object protection grid according to the invention or with steps of their assembly.

An object protection grid according to the invention is particularly suitable for subsequent installation in wall openings due to its flexible mountability. Above all, it is suitable for flexible adaptation to the conditions at the installation site, for example even if there are already through lines there and the remaining cross-section is to be secured against unauthorized entry or objects being thrown in.

The wall connection element is preferably connected to concrete walls, although other wall materials are also possible. For this purpose, the wall connection elements are, for example, doweled and/or screwed to the wall.

The slats can be prefabricated in different lengths with corresponding plug-in recesses provided therein. However, it would also be conceivable to provide the slats as endless products or goods that can be individually shortened. In both cases, the slats can be adapted to the installation situation, especially the individual routing of lines and/or the individual size and shape of a wall opening can be selected during installation.

In particular, the first and second slats can be provided as vertical and horizontal slats. In this case, the vertical slats have, for example, plug-in recesses in the form of slots for the insertion of horizontal slats, and vice versa.

The object protection grid is preferably mounted on a protected inside of the wall.

According to the invention, the plug-in section of the wall connection elements is designed with a further fourth plug-in recess. For example, a wall connection element designed as a wall connection bracket can have a partially continuous slot on the plug-in section on one side. The slot can in particular also extend over a corner or edge of the wall connection bracket, so that the slat can be received in the slot in both dimensions of the wall connection bracket.

Such a wall connection element is inserted into the second slat at the end section and then fastened to the wall. In the case of a wall connection bracket, this can, for example, be pushed over the slat into the third plug-in recess at the end and then screwed into a concrete wall with steel dowels. Of course, the same can also be provided on an end section of the first lamella and/or on the respective second end sections of the first and/or second lamella.

If both end sections of the second slat protrude beyond the wall opening, both end sections are preferably fastened with wall connection elements. Of course, depending on the installation situation and the desired resistance class, the first slats can also be attached to the wall in the same way as the second slats with wall connection elements.

In particular, there is no peripheral frame of the object protection grid, but a large number of individual or individually fastened wall connection elements for each slat. In this way, assembly is very flexible on the one hand and, on the other hand, the time required for disassembly, which ultimately determines the resistance class, is relatively high, since the slats also hold each other.

Steel, for example S 235 or S 335, preferably galvanized or painted, is particularly suitable as the material for the object protection grid, in particular for the slats and/or wall connection elements. Depending on the required resistance class, other materials can of course also be used.

It is also conceivable to use different materials for the slats and wall connection element. If the wall connection elements are, for example, far away from the wall opening and therefore cannot be attacked from the outside, they can optionally also be made from a material of lower strength, for example brass, cast iron, aluminum or plastic.

Advantageous refinements and developments result from the further dependent claims and from the description with reference to the figures of the drawing.

According to one embodiment, the first and second plug-in recess are each designed as a straight slot partially penetrating a lamella cross-section.

According to one embodiment, the width of the slot essentially corresponds to the thickness of the slats. The adjustment of the width of the slot to the thickness of the lamella is possible with a predetermined fit, preferably with a clearance or transition fit.

According to one embodiment, the third plug-in recess is aligned in the opposite direction to the second plug-in recess. This ensures easy insertion. Furthermore, a form fit is possible in this way. If necessary, the orientation can also be only partially opposite or oblique.

According to one embodiment, the plug-in section is designed in such a way that a lamella can be fixed with it in all directions or spatial directions. The plug section thus preferably forms a stop in all three translatory degrees of freedom. An at least partial definition of rotational degrees of freedom is also possible.

According to one embodiment, the wall connection element is designed as a wall connection angle, with the plug-in section being provided on a first angle arm and the fastening section on a second angle arm. For example, processed standard angles can also be used advantageously as wall connection elements.

According to one embodiment, the plug-in section has a fourth plug-in recess made in the first angle arm, which is oriented opposite to the third plug-in recess. For example, the fourth plug-in recess can be milled into a standard angle.

According to one embodiment, the third plug-in recess is designed as a straight slot that partially penetrates a lamella cross-section. The width of the slit essentially corresponds to the angular strength, with different adjustments to the fit being possible, for example as a clearance or transition fit.

According to one embodiment, the fourth plug-in recess is designed as a straight slot that partially penetrates a cross section of the plug-in section. The width of the slot essentially corresponds to the thickness of the lamella, with different adjustments to the fit also being possible, preferably as a clearance or transition fit.

According to an advantageous embodiment, a securing element for securing the plug connection is provided in the crossing area. In this way, the plug connection is secured against undesired or unauthorized loosening.

According to a development, the securing element has a flat connector. The flat connector can be fastened to the first slat in such a way that it extends parallel to the first slat over the second slat in the crossing area and thus secures the second slat in a form-fitting manner in the first plug-in recess. The flat connector is, for example, a U-shaped flat bar with through-holes for attachment in the area of the U-legs.

According to a further development, the securing element has two flat connectors arranged opposite one another in the crossing area on both sides of the first lamella. In this way, the securing of the plug connection is advantageously reinforced. At least one of the two flat connectors can have at least one threaded hole, so that the two flat connectors can be connected and fastened with a screw. In this case, a hole is also provided in the first slat for attachment, a screw being inserted on a first side into a hole in the first flat connector, passed through the hole in the slat and screwed into a threaded hole in a second flat connector on the second side.

According to a preferred refinement, a tool attachment provided for fastening the flat connector is provided with a fuse insert which is driven in with a non-positive fit in the assembled state. For example, an Allen key or Torx key can be secured with a steel ball that is driven or driven into it with a press fit.

According to a further embodiment, the securing element has a clip holder, which includes a U-shaped clip that fastens the first lamella and a clip that covers the crossing area.

According to a development, the bracket holder has a first and a second U-shaped bracket. The U-shaped brackets are provided on both sides of the crossing area. For example, they are each guided through a through-opening in the first slat and fastened to the clamp with both bracket ends. It is also conceivable to run the brackets around the entire depth of the first slat so that they encompass the slat. In this way, a form fit of the U-shaped bracket with the first slat is produced.

The U-shaped bracket can be attached to the clip, for example by screwing or welding.

In the case of a screw connection, the legs of the U-shaped bracket have an external thread, for example. Furthermore, the nuts used for the screw connection are provided on the protected or the inside of the object protection grille, so that they are covered by the clamp on the outside. Preferably also a cover of the nuts may be provided, which is fastened in the clamp with a suitable fastening means, for example with a countersunk screw. A tool attachment of the fastening means is or is preferably provided with a safety insert after assembly, for example in the form of a steel ball driven in with a press fit.

CONTENTS OF THE DRAWING

Fig. 1

eine schematische Darstellung eines Abschnitts eines Objektschutzgitters;

Fig. 2A - 2D

Schritte zur Montage beim Einbau eines Objektschutzgitters;

Fig. 3

eine perspektivische Detaildarstellung von Kreuzungsbereichen eines Objektschutzgitters;

Fig. 4

eine Draufsicht mit Quer- und Längsschnitt eines Objektschutzgitters gemäß einer weiteren Ausführungsform;

Fig. 5

eine Draufsicht mit Quer- und Längsschnitt eines Verbindungselements;

Fig. 6

ein Verbindungselement mit Sicherungseinsatz;

Fig. 7

eine Draufsicht und Vorderansicht eines Verbindungselements gemäß einer weiteren Ausführungsform; und

Fig. 8

eine Draufsicht mit Quer- und Längsschnitt eines Verbindungselements gemäß einer noch weiteren Ausführungsform.

The present invention is explained in more detail below with reference to the exemplary embodiments given in the schematic figures of the drawing. They show:

1

a schematic representation of a section of an object protection grid;

Figures 2A - 2D

Steps to assemble when installing a property protection grille;

3

a perspective detail view of crossing areas of an object protection grid;

4

a plan view with a cross section and a longitudinal section of an object protection grid according to a further embodiment;

figure 5

a plan view with cross-section and longitudinal section of a connecting element;

6

a fastener with a fuse link;

7

a top view and front view of a connecting element according to a further embodiment; and

8

a plan view with cross-section and longitudinal section of a connecting element according to yet another embodiment.

The accompanying drawing figures are intended to provide a further understanding of embodiments of the invention. They illustrate embodiments and, together with the description, serve to explain principles and concepts of the invention. Other embodiments and many of the foregoing advantages will become apparent by reference to the drawings. The elements of the drawings are not necessarily shown to scale with respect to one another.

In the figures of the drawing, elements, features and components that are the same, have the same function and have the same effect--unless stated otherwise--are each provided with the same reference symbols.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

1 shows a schematic representation of a section of an object protection grid 1.

The object protection grille 1 is a grille which is intended for subsequent installation in a wall opening 20 and has a first slat 2 and a second slat 3 . The two slats 2, 3 are arranged in a common plane of the wall opening 20 at an angle to one another.

In a crossing region 4 of the slats 2, 3, the first slat 2 has a first plug-in recess 5 and the second slat 3 has a second plug-in recess 6 aligned opposite to the first plug-in recess 5. By means of the plug-in recesses 5, 6, the two slats 2.3, as shown, can be plugged into one another.

In the embodiment shown, the first plug-in recess 5 of the first lamella 2 is arranged on a longitudinal side of the first lamella 2 protruding into the plane of the drawing. The second plug-in recess 6 of the second lamella is arranged on the longitudinal edge of the second lamella 3 lying in the plane of the drawing.

The first and second slats 2, 3 also each have a third plug-in recess 7 on one end section. In the perspective shown, the end section and the third plug-in recess 7 are at the upper end of the second slat 3 Paragraph 21 of the second lamella 3 is provided, which is provided and designed to rest against the edge of the wall opening 20 . In the same way, a shoulder 21' is also provided on the end section of the first slat.

In addition, a wall connection element 8 is provided, which has a plug-in section 9 and a fastening section 10 . The plug-in section 9 is designed so that it can be plugged into the third plug-in recess 7 . The fastening section 10 is also designed so that it can be fastened to a wall. By inserting the plug-in section 9 into the third plug-in recess 7 and fastening the fastening section 10 to the wall, the second lamella 3 is fixed to the wall in a form-fitting manner. In particular, it can no longer be shifted in any of the 3 translatory degrees of freedom. The rotational degrees of freedom are also fixed, at least to a large extent.

the Figures 2A - 2D show the steps for installing an object protection grille. With the steps shown for installation, the object protection grille can be installed or manufactured at the installation site. Of course, additional assembly steps for other elements not shown here can be provided.

Figure 2A illustrates a step of arranging a plurality of first slats 2 in a wall opening 20.

The first slats 2 are designed as flat profiles which have recesses in the form of plug-in recesses 5 and shoulders 21 at the ends.

The assembly takes place on a protected side of the wall opposite to an attack side

The first slats are introduced here, for example, vertically into the wall opening 20 . The orientation of the first and second slats 2, 3 is therefore opposite here 1 reversed.

The first slats 2 are arranged at a distance from one another which corresponds to a distance between the second plug-in recesses 6 in the second slats 3 . In the illustrated embodiment, this spacing is regular. In further embodiments, however, irregular or non-uniform distances would also be conceivable.

The first slats 2 are aligned plumb and flush to the desired distance and temporarily fixed (e.g. with wooden wedges) so that the ends of the slats rest against the protected wall side with the end sections of the slats.

In a second step according to Figure 2B Then, in the crossing areas 4 of the slats 2, 3, second slats 3 are inserted crosswise into the first plug-in recesses 5 of the first slats 2 with their second plug-in recesses 6. In the illustrated embodiment, the first and second plug-in recesses 5, 6 are each designed as a straight slot that partially penetrates the first and second plug-in recess 5, 6. A width of the slot essentially corresponds, ie with a predetermined fit, in particular a loose fit, to a lamella thickness of the first and second lamellae.

In the illustrated embodiment, the wall opening 20 is of approximately square design, purely by way of example. Apart from the direction of the second plug-in recesses 6, the second lamellae are therefore designed essentially the same as the first lamellae. Of course, if the longitudinal or transverse dimensions differ, different lengths of the first and second slats can be provided. In particular, the first and/or second slats 2, 3 can also be individually cut to length or adjusted in length to suit the size of the wall opening 20.

For the sake of clarity, only two second slats are shown here, each of which is inserted into the outermost first plug-in recesses 5 of the first slats 2 . This also serves, among other things, to check the spacing of the first slats 2. The final assembled state with all second slats 3 is in 2D shown.

Both the first slats 2 and the second slats 3 each have a shoulder in their end sections, which is located at the edge of the wall opening 20 is supported, so that by positioning and plugging into one another, on the one hand a rear or wall-side stop is formed and on the other hand the vertical and horizontal position of the slats 2, 3 in the wall opening 20 is largely predetermined. Of course, a double fit should be avoided so that sufficient play is provided in practice.

Figure 2C shows a further step of the assembly, the wall connection elements 8 with the plug-in section 9 being plugged into third plug-in recesses 7 provided on one end section of the slats 2,3. The third plug-in recesses 7 are aligned opposite to the second plug-in recesses 6 .

The wall connection elements 8 can, as in the embodiment shown here (see also 2D ) are provided both on the first and on the second slats 2, 3.

In further embodiments, it is conceivable to only provide wall connection elements 8 on the first or second slats and to fix the other slats positively thereto only by their end shoulder 21 and the first and second plug-in recesses 5.6.

In still other embodiments, it is also conceivable to omit wall connection elements 8 on an end section of the first or second slats, provided that both end sections of the other of the first or second slats are provided with wall connection elements 8 and fastened to the wall. In this case, however, the other slats would have to be adequately fastened with securing elements at the crossing points.

For better clarity are in Figure 2C only attached to the first slats wall connection elements 8 shown. Furthermore, purely illustrative, wall connection elements 8 are provided here partly as double elements for two slats and partly as individual wall connection elements 8 for a single slat. In addition, three or multiple elements for three or more slats would of course also be conceivable.

The wall connection elements 8 are each fastened to the wall with their fastening section 10 beyond the wall opening 20, for example by dowelling with suitable bores, dowels and screws.

The wall connection element 8 is designed here as a wall connection angle, with the plug-in section 9 being provided on a first angle arm and the fastening section 10 on a second angle arm. For plugging in, the plug-in section 9 has a fourth plug-in recess 11 made in the first angle arm, which is oriented opposite to the third plug-in recess 7 . The fourth plug-in recess 11 is designed as a straight slot that partially penetrates a cross-section of the plug-in section 9, the width of which essentially corresponds to the thickness of the lamella. The third plug-in recess 7 in the lamella is also designed as a straight slot that partially penetrates a lamella cross-section, the width of which essentially corresponds to the angular strength. In this way, the wall connection elements 8 embodied as wall connection brackets are plugged into the third plug-in recesses 7 provided for this purpose on the protected side of the wall over all the slat ends.

Bolt-through anchors of dimension M1O with countersunk head are provided as fastening means for wall fastening, for example in a wall made of concrete. Drillings in the wall are carried out according to the dowel specifications (diameter, drilling depth). the dowels are then inserted through the holes provided for this purpose in the fastening section into the wall connection bracket, preferably with washers, and the dowel is tightened according to the permissible tightening torque.

After attaching the first wall connection bracket 8 to the vertical slats 2, all the missing horizontal slats 3 can be inserted and also attached to the wall connection brackets.

2D shows the final assembled state of the object protection grille 1, wall connection elements 8 being provided on all slats 2, 3 at the end, purely by way of example. Depending on the installation situation, in other embodiments individual slats can also only partially protrude beyond the wall opening 20, so that the slats can sometimes only be attached to a wall connection element 8 on one side. In this case, however, a T-connection with a second cut to length or shortened end produce intersecting lamella, which in relation to 6 will be dealt with in more detail.

To produce the final assembled state according to 2D a step of attaching securing elements 12 in the crossing areas 4 is also provided. These are used to secure the plug connection, so that a form fit is also produced in the crossing areas 4 .

In the illustrated embodiment, the securing elements 12 are provided at all crossing areas on the vertical slats 2 in the form of two flat connectors, which are each screwed on with two Allen countersunk screws. Finally, steel balls are pressed or driven into the hexagon socket of all screws using a pressing or driving tool.

The object protection grille 1 is designed for subsequent installation in wall openings, preferably if there are already through lines there and the remaining cross-section is to be secured against unauthorized entry or objects thrown in.

In principle, different shapes of wall connection elements 8 are also conceivable. In one embodiment, the lattice construction is mainly attached to concrete walls and there either by means of suitable frame parts or short parts as wall connection elements 8, which are dowelled to the adjacent wall. The frame or short parts are formed with milled slots as a fourth plug-in recess 11, into which the first slats 2 can be used in the form of vertical flat slats. The vertical slats 2 have first plug-in recesses 5 in the form of slots for inserting horizontal second slats 3. The slats are secured in such a way that the wall connection elements are not continuously slotted on at least one side of the angle designed as a plug-in section. Rather, the slots are closed at the end of the male portion. The brackets are pushed over the slats and then screwed to the steel dowels provided in the wall.

With such an assembly, a peripheral frame is dispensed with. The horizontal slats 3 are pushed into the prepared slots 5 of the vertical slats 2. Then the individual wall connection elements 8 or angles pushed over the respective ends of the slats 2, 3 and screwed with wall plugs.

In the crossing area 4, flat connectors 13 in the form of slotted flat pieces or flat bars are screwed to the vertical slats and the slats are thus secured against one another.

The material used for the slats 2, 3 and/or wall connection elements 8 is, for example, predominantly steel S 235 or S 335, in particular galvanized or painted.

Furthermore, there are also various requirements to be met by the masonry of the wall. In order to ensure the burglar-resistant effect of burglar-resistant elements, it is assumed that the adjoining wall is a solid wall made of concrete or brickwork in accordance with the requirements for the surrounding wall according to DIN EN 1627:2011-09: Masonry wall according to DIN 1053-1 Reinforced concrete wall according to DIN 1045-2 resistance class nominal thickness compressive strength of the stones mortar group (min) nominal thickness strength class RC5 ≥240mm ≥20 DM ≥140mm C12/C15

Other types of wall construction (e.g. assembly walls) may be suitable if it is ensured that the loads that occur can be absorbed and the resistance of the masonry is comparable to the resistance of the burglar-resistant security grille.

Before assembly, the wall opening 20 must be checked for damage that could affect the general strength.

The choice of fasteners is made taking into account the forces to be transmitted, the strength of the adjacent component (masonry, concrete) and the movements occurring in the connection joint, e.g. B. by thermal expansion made.

3 shows a perspective detail view of crossing areas 4 according to an embodiment of an object protection grid 1.

In the crossing area 4, a securing element 12 for securing the plug connection of the first and second slats 2, 3 is provided. In the embodiment shown here, the securing element 12 is a flat connector 13, which with respect to FIG figure 5 will be dealt with in more detail.

Such a flat connector 13 can be fastened to the first lamella 2 in such a way that it extends parallel to the first lamella 2 over the second lamella 3 in the crossing region 4 and thus secures the second lamella in the first plug-in recess 5 in a form-fitting manner. In this way, the first and second slats 2, 3 are firmly coupled to one another in their plug-in connections.

In the embodiment shown here, the securing element 12 has two flat connectors 13 arranged opposite one another in the crossing region 4 on both sides of the first lamella 2 . These can thus be screwed together for assembly.

In total, a large number of connections between the slats 2, 3 and with the wall are created in this way. In order to release the object protection grid 1 , at least all attachments to the wall would have to be released, which is very complicated, particularly because these or the wall connection elements 8 are preferably located on a protected inside of the object protection grid 1 . Such an object protection grid thus has resistance class RC 5 according to DIN EN 1627, for example.

4 shows a plan view with a cross section and a longitudinal section of an object protection grid 1 according to a further embodiment.

In this embodiment, various designs of first and second slats 2, 3, wall connection elements 8 and securing elements 12 are shown as examples. The different variants are used in particular for individual adaptation, for example to the needs of cable routing that passes through the wall opening. In lattice sections without such line routings, the lattice spacings can thus be set more closely, while recesses in the lattice for line routing are locally possible in the most varied of sizes.

On the one hand, the distances between the first and second slats 2, 3 can be set with one another by means of wall connection elements 8 that are different or have different widths. The position of the first and second plug-in recesses 5, 6 is adjusted accordingly.

In the sectional view A-A, the design of the wall connection elements 8 can be seen in section. These are designed here as 90° angle connectors, with the plug-in section 9 having the fourth plug-in recess 11 . This fourth plug-in recess extends beyond the 90° bend of the angle connector and thus also partially into the wall connection section 10.

The second slat 3 shown from the side in the illustration A-A extends in the drawing shown at one end section (upper in the illustration) in the height direction up to an end of the fourth plug-in recess 11 lying in the fastening section 10 of the wall connection element 8. The fastening section 10 is already flat against the wall in this area. Beyond the fourth plug-in recess 11, the fastening section 10 is connected to the wall.

Purely by way of example, the connection of the fastening element 10 to the wall is provided here with a screw which is screwed into a profile 22 defining an edge of the wall opening 20 . In this case, the profile 22 shown represents part of the wall containing the wall opening 20.

In the area of the plug-in section 9, the fourth plug-in recess 11 extends approximately to the middle of the plug-in section 9. The height of the remaining material of the plug-in section 9 corresponds to a height of the third plug-in recess in the second lamella 3 shown laterally in section AA The paragraph 21 of the second lamella 3 also rests on the wall, or here the profile 22, in this state. The slat 3 is thus fixed to the wall (or here the profile 22) by the crossed plug-in connection with the wall connection element 8 and its fixing via the fixing section 10.

In the further sectional view B-B, the connection of the first slat 2 to the wall (or profiles) via wall connection elements 8 is provided in the same way on both end sections of the first slat 2.

On the second end section (lower in section A-A) of the second lamella 3 there is no connection via a wall connection element 8 . Instead, at this point it is cut to length at the edge corresponding to the geometry of the wall opening 20 . In this way, for example, the length of the slats 3 can be individually adapted to different wall openings 20 . A wall connection element 8 is therefore free or loose here.

In addition to the different slats, different types of securing elements 12 are also provided. The different securing elements 12 serve, on the one hand, to adapt to different local spatial conditions and, on the other hand, to vary the alignment of the fastening means used to fasten the securing elements 12 . In the embodiment shown, for example, in a lower half of the object protection grid, the 3 Flat connectors 13 shown are provided as securing elements 12 . In some cases, these are at points where a single horizontal slat, for example for cable bushings, is locally excepted, by a reference to 6 T-connector explained in more detail below.

On the other hand, so-called bracket holders 16 for connecting the slats 2 , 3 are provided in an upper half of the object protection grid 1 . These are related to 7 explained in more detail.

With an object protection grille 1 designed in this way, line bushings can thus be made possible flexibly and a remaining cross section of the wall opening 20 can nevertheless be tightly secured.

figure 5 shows a plan view with cross and longitudinal section of a connecting element.

This connecting element is formed here with U-shaped flat connectors 13 provided on both sides of a lamella 2 . A flat connector 13 is in the form of a flat bar with a recess entering at one edge and extending approximately to the middle designed in lamella thickness with clearance fit. The recess is milled, for example, so that a U-shape of the flat connector 13 is created. A mounting hole is provided in the area of the resulting U-legs.

In the illustrated embodiment, a first flat connector 13A has a countersunk attachment for countersinking a countersunk screw head. For example, a countersunk screw used for this purpose can be an M10 countersunk screw according to DIN 7991. In the case of a second flat connector 13B, the fastening hole is provided with an internal thread for screwing in the countersunk screw.

The lateral flanks of the flat bar are beveled, for example by means of flame cutting. In particular, this makes it more difficult for a lever tool to be applied to the flat connector 13 .

6 shows a connecting element 12 after figure 5 with fuse insert.

As already in relation to 2D mentioned, a tool attachment 14 of a fastener provided for attachment of the flat connector 13 is provided with a fuse link 15 driven into the tool attachment 14 with a force fit. Depending on the design of the tool attachment, it may also be a safety attachment.

For example, as in the illustrated embodiment, a steel ball can be driven in as a fuse insert 15 with a hexagon socket as the tool attachment 14 .

7 12 shows a top view and a front view of a connecting element according to a further embodiment.

This is a T-connector, which with a flat connector 13 according to figure 5 and two elbows 23 is formed. While the flat connector 13 extends beyond the crossing area 4 , the angle pieces 23 are each inserted into corners of the crossing area 4 .

8 12 shows a top view with cross-section and longitudinal section of a connecting element according to yet another embodiment.

The securing element 12 is designed here as a clip holder 16 which comprises a U-shaped clip 17 which fastens the first lamella 2 and a clip 18 which covers the crossing region 4 . The bracket 17 can, for example, be a round steel bracket according to DIN 3570, for example with the dimension M10.

The bracket holder 16 has a first and a second U-shaped bracket 17, 17', which are fastened to the clamp 18 on both sides of the crossing region 4 with the first slat 2 and with the two bracket ends 19, 19'.

For fastening the bracket ends 19, 19', the clip 18 has through-holes, behind which a nut is placed on the bracket ends 19, 19'.

A C-shaped cover plate is provided to cover the nuts, which is fastened to the clamp 18 with a countersunk screw.

Although the present invention has been fully described above with reference to preferred exemplary embodiments, it is not restricted thereto but can be modified in a variety of ways within the scope of protection which is defined by the appended set of claims.

reference list

1

Object protection grid

2

first lamella

3

second lamella

4

crossing area

5

first slot

6

second slot

7

third slot

8th

wall connection element

9

mating section

10

attachment section

11

fourth slot

12

fuse element

13

flat connector

14

tool approach

15

fuse link

16

bracket holder

17,17'

hanger

18

clamp

19, 19'

temple end

20

wall opening

21

Unit volume

22

profile

23

elbow

Claims (15)

1. Object protection grating (1) for retrofitting in wall openings, in particular for securing a remaining cross-section of a wall opening having a cable feed-through, comprising a first lamella (2),

   comprising a second lamella (3) arranged in a shared plane at an angle to the first lamella (2), the first lamella (2) having a first plug-in recess (5) and the second lamella (3) having a second plug-in recess (6), orientated counter to the first plug-in recess (5), in a crossing region (4), in such a way that the first and second lamella (2, 3) can be plugged into one another, a third plug-in recess (7) being provided on at least one end portion of the lamellae (2, 3) in each case, and

   comprising a wall connection element (8), which has a plug-in portion (9) pluggable into the third plug-in recess (7) and a fastening portion (10) fastenable to a wall, the plug-in portion (9) having a fourth plug-in recess (11) and being formed in such a way that the lamellae (2, 3) can thereby be positively fixed to the wall.
2. Object protection grating according to any of the preceding claims,
   characterised
   in that the first and second plug-in recess (5, 6) are each formed as a straight slit which partially penetrates through a lamella cross section.
3. Object protection grating according to claim 2, characterised
   in that a width of the slit substantially corresponds to a lamella thickness.
4. Object protection grating according to any of the preceding claims,
   characterised
   in that the third plug-in recess (7) is orientated counter to the second plug-in recess (6).
5. Object protection grating according to any of the preceding claims,
   characterised
   in that the plug-in portion (9) is formed in such a way that a lamella (2, 3) can thereby be fixed in all spatial directions.
6. Object protection grating according to any of the preceding claims,
   characterised
   in that the wall connection element (8) is formed as a wall connection elbow, the plug-in portion (9) being provided on a first elbow arm and the fastening portion (10) on a second elbow arm.
7. Object protection grating according to claim 6, characterised
   in that the fourth plug-in recess (11) is formed in the first elbow arm of the plug-in portion (9) and is orientated counter to the third plug-in recess (7).
8. Object protection grating according to claim 7, characterised
   in that the third plug-in recess (7) is formed as a straight slit which partially penetrates through a lamella cross section and the width of which substantially corresponds to an elbow thickness.
9. Object protection grating according to either claim 7 or claim 8,
   characterised
   in that the fourth plug-in recess (11) is formed as a straight slit which partially penetrates through a cross section of the plug-in portion (9) and the width of which substantially corresponds to the lamella thickness.
10. Object protection grating according to any of the preceding claims,
    characterised
    in that a securing element (12) for securing the plug-in connection is provided in the crossing region (4).
11. Object protection grating according to claim 10, characterised
    in that the securing element (12) has a flat connector (13) which is provided fastenable to the first lamella (2) in such a way that said connector extends over the second lamella parallel to the first lamella in the crossing region and thus positively secures the second lamella in the first plug-in recess.
12. Object protection grating according to claim 11, characterised
    in that the securing element (12) has two flat connectors (13) arranged mutually opposite on the two sides of the first lamella (2) in the crossing region (4).
13. Object protection grating according to either claim 11 or claim 12,
    characterised
    in that a tool fitting (14) provided for fastening the flat connector is provided with a non-positively driven-in securing insert (15) when mounted.
14. Object protection grating according to claim 10, characterised
    in that the securing element (12) has a holding bracket (16), comprising a U-shaped bracket (17) fastening the first lamella (2) and a clamp (18) covering the crossing region (4).
15. Object protection grating according to claim 14, characterised
    in that the holding bracket has a first and a second U-shaped bracket (17, 17'), which are fastened, on the two sides of the crossing region (4), to the first lamella (2) and by two respective bracket ends (19, 19') to the clamp (18) .

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