DE202011106102U1 - Shelling and burglary resistant board for a security wooden door - Google Patents

Abstract

Bullet and burglar-resistant plate (1), in particular in the form of a door leaf for a security door, comprising at least two wooden layers (2) and a security layer (3) arranged at least partially between them and connected to the wooden layers (2), characterized in that that the security layer (3) comprises a polymer film.

Description

The present invention relates to a bullet-proof and burglary-resistant board, in particular in the form of a door panel for a security door, comprising at least two wood layers and a security layer arranged at least partially between these and connected to the wood layers. The invention also relates to a bullet-proof and burglar resistant door leaf and a safety door made therefrom.

Shelling and burglary resistant plates of the type mentioned for use as a door leaf in corresponding security doors are known from the prior art. These usually have a multilayer structure with external layers of wood and an internal security layer. The security layer typically consists of a solid metal plate whose thickness is adapted to the desired shooting safety.

Such a construction has several disadvantages. Since a higher security against shelling can be achieved practically only by reinforcing the inner metal plate, the already considerable weight of such plates increases even more with increasing shooting safety. This not only complicates the transport and installation of security doors from such panels, but also has high mechanical requirements for the holding devices such as door hinges and the like result. The high weight of such doors also complicates the opening or closing.

Another problem is that because of the massive internal metal plate subsequent processing, such as the cutting of the door in the lower area, is hardly possible or at least associated with considerable effort.

To address these problems, at least partially, a bullet- and burglar-proof plate was developed recently, which is marketed under the name "Delignit Panzerholz ^®". These are highly compressed wood-based panels with a layered structure. But even such plates have a relatively high weight because of the high resin content, which complicates processing and handling.

An alternative construction is from the CH 691 497 A5 known. It discloses a bullet-resistant and burglary-resistant security door which has a door leaf element with internal metallic struts or stiffeners. On this door leaf element, a bullet-resistant multi-layer textile layer is applied, which comprises at least one layer of bullet-resistant and highly tear-resistant fibers. The fibers are embedded in a synthetic resin matrix.

In such a structure, the burglar-resistant function is taken over by the metal-reinforced door leaf element and the bullet-inhibiting effect of the multilayer layer. As a result, the door leaf, however, is relatively thick overall. In addition, the metallic reinforcements increase the basis weight and involve comparable machinability issues as those already discussed for the doors with internal metal plates.

The object underlying the present invention was thus to provide a bullet-proof and burglar-resistant plate, in particular for a door leaf of a security door, which offers sufficient security against bombardment and burglary attempts despite its low weight. The plate should also be easier nachbearbeitbar, as is the case with the previously known constructions.

This object is achieved by a bullet-proof and burglary-resistant plate, in particular in the form of a door panel for a security door comprising at least two wood layers and a security layer at least partially arranged between these security layer, which is connected to the wood layers, wherein the plate is characterized in that the security layer comprises a polymer film.

The present invention is based on the finding that a plate can be produced by the special layer structure with external wood layers and at least one inner film layer, which on the one hand is sufficiently tough and difficult to penetrate and on the other hand has a comparatively low weight per unit area. The bombardment and burglary-inhibiting effect of the security layer is further enhanced by the alternating layer structure according to the invention.

Another advantage of the plate according to the invention is that it preferably has neither metallic reinforcements nor textile materials. Therefore, the plate can be processed by most common methods, such as sawing or grinding on the cross-sectional surface.

Under a bulletproof and burglar-resistant plate is understood such a plate, at least the lowest requirement category of resistance classes against shelling after EN 1522 and EN 1523 as well as against manual attack (burglar resistance) DIN V ENV 1627 equivalent. With the basic structure according to the invention, however, in principle all resistance classes can be checked against bombardment DIN 52 290/2 or against manual attack DIN V 18 103 realize.

In the context of the present invention, a security layer which is arranged over part of the area is understood to mean an arrangement in which the wood layers adjoining the security layer in each case project beyond the security layer at least on one side. Preferably, however, the wood layers and the security layer have the same lateral dimensions, so that the security layer is arranged over the whole area covering between the wood layers.

According to a preferred embodiment of the panel according to the invention, this has n wooden plies and at most (n-1) security layers, each in an alternating arrangement, where n is a natural number from 3 to 100, in particular from 5 to 50. Preferably, n is 10 or greater, in particular 15 or greater. The plate thus has an alternating layer structure with a sandwich-like arrangement of one security layer between two layers of wood. It is provided in the context of the invention that the individual layers of a group, that is, wood layers on the one hand and security layers on the other hand, each consist of an identical or made of various materials.

So it is particularly possible that the respective outer wood layers are made of a different type of wood than the internal wood layers. In this way, the outer design can be adjusted as desired, for the internal wood layers from the safety point of view particularly suitable types of wood can be used.

However, it can also be provided that the plate in addition to the respective outer layers of wood further, attached thereto decorative layers, which may also consist of wood or a wood material.

The wood used in the context of the present invention for the wood layers can be selected in principle from all types of wood or wood-based materials. These are, for example, materials based on solid wood, veneer materials, chipboard materials or fiber materials. Preferably, the wood layers of solid wood, veneers, plywood, wood chip and / or wood fiber materials.

Plywoods are for example cross laminated timber, glued laminated timber, composite plywood, solid wood elements of cross laminated boards, veneer plywood, laminated veneer lumber, veneer lumber, bent plywood or synthetic resin plywood.

As chipboard materials are, for example flat pressed plates (P1-P7), commonly referred to as chipboard, extruded plates, coarse chipboard, also called OSB board, or chipboard wood (LSL) are used.

Suitable wood fiber materials include wood fiber insulation boards (HFD) (also poräse Faserplatte and "Soff Board" (SB)), medium-hard fiberboard (MB), hard fiberboard (HB or HFH), extra hard fibreboard (HFE) or high-density fibreboard (HDF).

When using solid wood layers especially long-fibred wood species are particularly suitable because they improve the bombardment and burglar resistant properties of the plate according to the invention. If the plate has more than two layers of wood, it is therefore preferred for the inner layers of wood recourse to one of the aforementioned materials.

The thickness of the individual wood material layers can vary within wide ranges. It is particularly expedient if the thickness is 0.5 to 22 mm. In this case, when using three or more wood layers, the thickness of the respective outer wood layers are higher or else lower than for the inner ones.

In the same way, the thickness of the security layer can be adjusted within wide ranges. The thickness is preferably 0.05 to 2.0 mm, in particular 0.1 to 1.0 mm.

As a rule, each security layer has only one layer of film. However, embodiments are also conceivable in which at least one security layer comprises more than one film layer.

More preferably, the polymer material of the polymer film is selected from polyesters, polyvinyl acetals such as polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyamides such as aramid, thermoplastic elastomers (TPE) such as thermoplastic polyurethane (TPU), and mixtures of these. Of the polymer materials mentioned, polyvinyl butyral is particularly preferred, since a good bombardment and burglar-resistant effect can be achieved with this material in the alternating combination with wood layers according to the invention even at relatively low plate thicknesses and layer numbers.

For the production of a panel according to the invention, the wood layers and the security layer can be interconnected in any known manner be connected. It is particularly advantageous if the wood layers and the intervening security layer are glued together, in particular laminated on one another. For this purpose, for example, a hot melt adhesive can be used which is applied to the security layer and / or the wood layers. For production, the security layer is then inserted between the adjacent wood layers and heated in a heating or laminating press via the activation point of the laminating or hot-melt adhesive. Alternatively, a heat-reactive adhesive can be used.

If the plate is composed of only a few layers, the lamination can be done in one step. However, if the plate is to consist of a plurality of layers, it is useful to gradually glue the layers together, as otherwise the inner layers may not be sufficiently fixed together or the residence time in the laminating press is too high due to the poor heat-conducting properties of wood. This applies, for example, to panels with more than 5 wood layers and more than 4 security layers in the thickness ranges specified above.

Depending on the choice of the polymer material of the security layer or depending on its melting point, the security layer can also be connected directly via the action of heat with the wood layers, for example in polyvinyl butyral. This then acts as an adhesive itself. An additional hot melt adhesive is not required.

Alternatively, the wood layers and the security layer can also be connected by means of an adhesive or reactive adhesive. For this purpose, all suitable adhesives for bonding wood and polymer films in question, such as acrylic adhesives and 1- and 2-K epoxy or polyurethane adhesives.

According to a particularly preferred embodiment of the present invention, the plate has no metallic reinforcements. In this way, the weight of the plate can be kept low.

The present invention further relates to a bullet-proof and burglar-resistant door leaf for a security door, the door panel comprising a panel according to the invention.

Another object of the present invention relates to a bullet-proof and burglar resistant security door, which is characterized in that the door leaf of the security door comprises a plate according to the invention. The security door may have the other usual attachments, such as a door lock, a door handle, hinges and the like. In addition, it is possible to integrate a transparent element in the door leaf, for example a glass or plastic pane. This should preferably also be designed bullet-resistant.

The present invention will be discussed in more detail below with reference to an embodiment shown in a figure.

The single figure shows a section of a bombardment and burglar resistant plate according to the invention 1 of a door leaf of a security door in sectional view. In the picture you can see that the plate 1 has a multi-layered structure of alternately arranged layers, namely six layers of wood 2 and five security layers 3 , The wood layers 2 consist of beech wood and have a thickness of 3 mm each. The security layers 3 are also 3 mm thick and consist of a Polyvinylbutyralfolie. The wood layers are glued to the security layers via a hot melt adhesive.

Such a disk easily withstands a manual attack of class WK3 DIN V ENV 1627 as well as a bombardment according to class B4 EN 1522 and EN 1623 was standing.

LIST OF REFERENCE NUMBERS

1

plate

2

layers of wood

3

layers of security

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• CH 691497 A5 [0006]

Cited non-patent literature

• EN 1522 [0012]
• EN 1523 [0012]
• DIN V ENV 1627 [0012]
• DIN 52 290/2 [0012]
• DIN V 18 103 [0012]
• DIN V ENV 1627 [0035]
• EN 1522 [0035]
• EN 1623 [0035]

Claims (11)

Bombardment and burglary resistant plate ( 1 ), in particular in the form of a door panel for a security door, comprising at least two layers of wood ( 2 ) and between these at least partially arranged security layer ( 3 ), with the wood layers ( 2 ), characterized in that the security layer ( 3 ) comprises a polymer film. Plate according to claim 1, characterized in that the plate has n wooden layers ( 2 ) and at most n - 1 security layers ( 3 ) in each case in an alternating arrangement, n being a natural number of 3 to 100, in particular of 5 to 50. Plate according to claim 1 or 2, characterized in that the material of the wooden layers ( 2 ) is selected from solid wood or wood-based materials, in particular from veneers or plywood. Plate according to one of the preceding claims, characterized in that the thickness of the wooden layers ( 2 ) is 0.5 to 22 mm, preferably 0.9 to 10 mm. Plate according to one of the preceding claims, characterized in that the thickness of the security layer ( 3 ) Is 0.05 to 2.0 mm, especially 0.1 to 1.0 mm. Plate according to one of the preceding claims, characterized in that at least one security layer ( 3 ) comprises more than one film layer. Plate according to one of the preceding claims, characterized in that the polymer material of the polymer film is selected from polyesters, polyvinyl acetals such as polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyamides such as aramid, thermoplastic elastomers (TPE) such as thermoplastic polyurethane (TPU) and mixtures of this. Plate according to one of the preceding claims, characterized in that the layers of wood ( 2 ) and the intermediate security layer ( 3 ) are glued together, in particular laminated. Plate according to one of the preceding claims, characterized in that the plate has no metallic reinforcements. Shelling and burglar-resistant door leaf for a security door, characterized in that the door leaf comprises a plate according to one of claims 1 to 9. Shelling and burglary resistant security door, characterized in that the door leaf of the security door comprises a plate according to one of claims 1 to 9.

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