EP1347424B1 - Combination of a border of an opening, a closure element for the opening and a burglar alarm - Google Patents

Abstract

The arrangement has a closure element (2) associated with the opening (1) and the edging (6) is part of a housing (4) for enclosing a hollow volume (5). A joint (7) between the edging and closure element is accessible from the outside for breaking in with a tool (8) and contains an externally concealed attack detector (3) in the form of an electrical conductor with the mechanical breaking behavior of a brittle material when loaded transversely. AN Independent claim is also included for the following: an electrical conductive long prism body for use as an attack detector.

Description

The present invention relates to a combination of the border of an opening, a closure element for the opening and an attack detector according to the preamble of the main claim and an electrically conductive prismatic body for use as an attack detector in such a combination.

Such a combination or such an electrically conductive long prismatic body is known from the DE 34 19 526 A1 ,

Without limiting the invention thereto, such an attack detector is arranged on windows or doors in homes, business premises, automobiles and consists of a disposed within a seal electrical conductor, which then becomes electrically conductive when a transverse force is applied to the seal.

Generally, according to this disclosure, such seals can be used wherever openings are covered by a closure which can be opened. In addition to windows and doors therefore also closures of safekeeping or the like come into consideration.

A disadvantage of such an attack detector in combination with the border of an opening and the closure element for the opening is in addition to a complex manufacturing process also the low reliability against false alarm, since the seal must be compressed to achieve the desired sealing effect inevitably.

The installation conditions between the border of the opening and the closure element are individually very different and therefore can not generally be considered as reproducible.

The inserted within the rubber seal electrical conductors must therefore be installed at a relatively large distance to account for the individual compression of the seal in the closed state.

Another such combination is known from the DE 197 19 231 A1 ,

Although it is spoken only of building windows and doors. However, this is not intended to limit the invention to the use between window frames and sashes of windows, as the invention is generally applicable to all combinations in which an opening is surrounded by a skirt which serves as part of a housing for enclosing a cavity and is closable by a closure element which is lockable at least locally with the border.

The advantage of the combination disclosed therein is that a driven burglary tool is detected almost immediately after driving into the parting line, which remains between the edge of the opening and the closure element.

Taking into account, however, that the alarm is generated in this attack detector almost immediately after the onset of burglary, depending on where the alarm accumulates, can not generally prevent offenders are deterred by the alarm and get out without deception.

However, this often leaves the homeowner uncertainty as to whether an intrusion attempt has taken place because it can not generally be avoided that the deformation of the parting line between sash and frame adjacent areas is done only in the elastic region and the attack detector is not necessarily destroyed.

In particular, in the case of borders by frame made of hollow plastic profiles and closure elements in the form of sash of the same material, the deformations can be done only in the elastic region of the plastic hollow profile and lead to these difficulties.

It is therefore an object of the invention to provide an electrically conductive long prismatic body for use as an attack detector, which eliminates these Misstände and also avoids the above-mentioned disadvantages of a combination of the border of an opening, a closure member for the opening and such an attack detector.

This object is achieved by the invention having the features of the main claim and claim 11.

From the invention there is the advantage that the Eindringweg a burglary suitable lever tool in the parting line between the border and closure element is irreversibly traceable and therefore also detectable.

This advantage is achieved in that the electrical conductor for triggering the alarm signal must inevitably be irreversibly deformed, the irreversible deformation takes place virtually without macroscopic deformation of the attack detector.

In order to deform the attack detector, the forces exerted transversely to the longitudinal region of the parting line by the lever tool suitable for burglary are exploited on the attack detector, the detector - as seen in fracture mechanics - having a Has elastic limit which practically coincides with the breaking strength.

In this way, the attack detector reaches its breaking strength with transverse load virtually without permanent plastic deformation and thus goes to breakage.

With the breakage of the attack detector this loses the electrical conductivity.

Since this can easily be derived from an electrical signal, which is clearly due solely to a fraction of the sensor, false alarms are avoided and increases the security against violent intrusion. The electrical signal is used in a conventional manner for acting on an alarm system.

Essential to the invention is therefore the use of a brittle material in which the material at a given transverse load, that is transversely to the longitudinal direction of the parting line between the border and closure element, virtually no macroscopically recognizable plastic deformation behavior more, so that the attack detector occupy only two distinct states can.

If the attack detector is intact, then it can be deduced from this that a break-in attempt does not take place.

If a break-in attempt takes place, the material of the attack detector fails by the extent of the superimposed transverse stresses, and due to its lack of deformability it can not store any deformation work and thus suddenly breaks due to the transverse stresses.

In this case, the locking between the border and the closure element is of great importance, as provided in practical embodiments, for example in windows and doors of buildings, only locally in the region of the parting line between the border and closure element.

Although sufficiently intruder-resistant interlocking pairings are known from the prior art, it is necessary to provide a burglary inhibition upstream of the interlocking pairing.

For this purpose, the attack detector is arranged in as far as possible upstream region of the parting line to prevent the suitable for burglary pruning tool can attack the locking mating.

The attack detectors according to the present invention are small in volume and virtually everywhere to install inconspicuous in the outwardly mounted region of the parting line.

Therefore, there is a locking upstream burglary inhibition, which leads due to a sudden destruction of the attack detector without notice to the triggering of an alarm signal by the generated electrical signal is forwarded to an alarm system.

However, it is essential in any case the use of an electrically conductive attack detector and a material which has brittle fracture behavior due to the material structure without macroscopic shape change of the material.

Such materials may consist of glass, ceramic, porcelain, crystalline material or brittle metals.

If the material itself is not electrically conductive, the electrical conductor must be firmly joined together with a carrier body made of this brittle material.

For this purpose, several embodiments come into consideration.

On the one hand, the electrically conductive material can be vapor-deposited, electro-deposited, painted or applied by other coating methods onto a brittle carrier body.

The integration of an electrically conductive wire within such a brittle body is also conceivable.

In addition, the electrical conductor can also consist of comminuted electrically conductive material, for example of iron powder or the like, which is distributed in such a high concentration within the brittle material that in this way a total conductive attack detector is formed.

In addition, the brittle material may also have electrical conductivity itself and in this way form the same material of material, the electrical conductor made of brittle material.

In order to detect as early as possible the driving in of a burglary tool suitable for burglary, for example a breaking bar, a powerful screwdriver or the like, the attack detector should be arranged as close as possible to the point of penetration in the region of the parting line.

If the attack detector locally placed there in a bed, so he is exposed to cleaning windows open virtually no risk of destruction, the bed is to provide so close to the penetration of the parting line that the attack detector detected with locked closure element only under the influence of force from the lever tool becomes.

While in certain applications, for example in closures of safekeeping, it is assumed that the closure element rises to the outside, resulting in applications of the attack detector according to the invention on windows and doors simplification that there the closure elements, namely the sash, usually in the direction of Room interior, that is to be opened to the cavity.

As far as today's usual locking mating already provide a very good burglar resistance, which also using large lever tools, known for example as Kuhfuß, not easy to crack, it is sufficient for these applications, the attack detectors provide at least in the longitudinal regions of the parting line between the opening and closure element, where the locking points are provided. The attack detector can also be arranged circumferentially around the entire parting line.

In the case of a merely local arrangement in the region of the locking pairings, only the locking points are protected by the attack detector. However, the locking points are primarily attacked in a break-in attempts points of the parting line, because only there the locking engagement between the locking partners can be solved.

Correspondingly short-lasting attack detectors, which preferably sit around the entire parting line at the locking points, are the result, wherein the different attack detectors can be interconnected by simple electrical conductors.

In the following the invention will be explained in more detail with reference to an embodiment.

• Fig.1 ein erstes Ausführungsbeispiel der Erfindung anhand eines Fensters eines Gebäudes mit Blendrahmen und Flügelrahmen.

It shows:

• Fig.1 A first embodiment of the invention with reference to a window of a building with frame and sash.

The Fig.1 shows the combination of the border 6 of an opening 1, a closure element 2 for the opening and an attack detector. 3

In this case, it is the cross section of a masonry, in which a window, consisting of fixed frame and relative openable sash frame with glass is installed.

The masonry is referred to as housing 4. The window frame covered by the opening of the window is an opening in the sense of the invention while the sash together with the window pane, the closure element 2 represents.

The border 6 is formed here by the stationary built-in frame.

The cavity 5 in the context of the invention forms the building interior.

Since the casement is movable relative to the frame in hinges formed between the frame, or the border 6 and the wing frame or the closure element 2 is a parting line 7, in which a lever tool 8 can be driven when unauthorized persons try to break the window.

In this respect, it is known to provide an attack detector 3 directly in the neighboring area to the parting line 7, which extends along the parting line 7.

Such attack detector has electrically conductive property and is connected to an alarm system.

The alarm can either accumulate centrally at the building or, for example, at the nearest police station.

It is essential that the attack detector 3 is an electrical conductor, which has the mechanical fracture behavior of a brittle material under a load transverse to the longitudinal region.

As far as shows Fig.1 the lever direction, with which attempts to open the parting line 7 far enough that with further driving the lever tool 8, a sufficiently large leverage on the sash (= closure element 2) can be exercised.

In this case, with increasing propulsion of the lever tool 8 belonging to the sash frame or frame material is plastically deformed so far that the attack detector 3 is destroyed.

It can be seen that in the direction of the lever, a force is exerted on the parting line 7, which is transverse to the longitudinal region of the profile beams and in this way leads to the breakage of the attack detector 3, if this can not join the deformation due to the lever direction.

This is achieved in that the attack detector consists of a brittle material which shows a corresponding non-elastic fracture behavior and practically breaks at the transverse loads occurring.

The electrical conductor may be firmly joined together with a carrier body of the brittle material.

This can be realized by painting, vapor deposition, galvanic or other coating.

In order to get a sufficiently large selection of brittle materials, the brittle body itself can have no electrical conductivity while the electrical conductor then consists of electrically conductive material.

On the other hand, the electrical conductor can also consist of comminuted electrically conductive material, which is distributed within the brittle material in a concentration which produces electrical conductivity.

On the other hand, it can be provided that the electrical conductor is applied to the surface of the brittle material or that the brittle material itself has electrical conductivity and forms the electrical conductor.

In addition, shows Fig.1 the special case that the attack detector 3 rests in the region of the parting line 7 in a bed 9 and is arranged there, where he is in the locked closure element (not shown) is only detected under the action of force from the lever tool 8.

As a bed 9, a longitudinal recess in the rebate of the window frame is used here, which is practically ineffective in the illustrated center seal profile. There, the attack detector 3 is inserted longitudinally and covered by an additional seal 10, so that it remains unaffected by weather conditions.

Furthermore, a corresponding electrical signal is triggered by this arrangement of the attack detector 3 immediately behind the inlet opening 11 already at the beginning of the break-in attempt, which can then be given to the alarm system in a conventional manner.

The concrete embodiment according to Fig.1 moreover shows a closure element 2, which is opened in the direction of the cavity 5. The opening direction 12 goes towards the interior of the room.

This results in relatively unfavorable leverage. Nevertheless, a derarige constellation can be broken through appropriately sized burglary tool.

However, at least the attack detector 3 should be provided in the longitudinal areas of the locking points between the opening 1 and the closure element 2.

In the same way, the attack detector 3 can also be wrapped completely around the parting line 7.

In the case of the arrangement of individual attack detectors 3 only in the area of the locking points, these are expediently connected to one another in an electrically conductive manner.

In this way, the electrical signal can be generated so to speak in series and regardless of the location, where the lever tool 8 breaks the attack detector 3, the alarm signal is triggered.

Essential to the invention is the formation of the attack detector 3 as an electrically conductive long prismatic body for use in combination with a closure element 2 for an opening 1 and a border 6, wherein the long prismatic body under transverse load to its longitudinal direction, the mechanical fracture behavior of a brittle body which does not have a pronounced Hooke's area.

REFERENCE NUMBERS

1

opening

2

closure element

3

attack detector

4

casing

5

cavity

6

border

7

parting line

8th

pry tool

9

bed

10

poetry

11

inlet opening

12

opening direction

Claims (16)

1. Combination of the border(6) of an opening (1), a locking element (2) for the opening (1) and an intrusion detector (3), which intrusion detector is an electrical conductor that, under stress that is crosswise to the longitudinal region, has the mechanical fracture behaviour of a brittle material, where

   - the border (6) must serve as a component of a casing (4) to enclose a cavity (5) and

   - a locking element (2) that can be locked at least locally with the border (6) is assigned to the opening (1), and

   - a separation joint (7) that is accessible from outside the cavity (5) for the purpose of entry with a lifting tool (8) exists between the border (6) and the locking element (2),

   - in the longitudinal region of which separation joint the intrusion detector (3), which is hidden from the outside and has electrically conductive properties, is provided,

   characterised in that the intrusion detector (3) extends around the entire separation joint (7).
2. Combination according to claim 1, characterised in that the electrical conductor is firmly joined together with a supporting body of the brittle material.
3. Combination according to claim 2, characterised in that the brittle material itself has no electrical conductivity and in that the electrical conductor consists of another material.
4. Combination according to claim 3, characterised in that the electrical conductor is distributed homogenously within the brittle material in a concentration that establishes conductivity.
5. Combination according to claim 3, characterised in that the electrical conductor is applied to the surface of the brittle material.
6. Combination according to claim 2, characterised in that the brittle material itself has electrical conductivity and forms the electrical conductor.
7. Combination according to one of claims 1 to 6, characterised in that the intrusion detector (3) is inserted in the region of the separation joint (7) in a bed (9) and is arranged where it is detected when the locking element is locked only under force from the lifting tool (8).
8. Combination according to one of claims 1 to 7, characterised in that the intrusion detector (3) is arranged immediately behind the inlet opening (11) into the separation joint (7).
9. Combination according to one of claims 1 to 8, characterised in that the locking element (2) is opened towards the cavity (5), and in that the intrusion detector (3) is provided at least in the longitudinal regions of the locking points between the opening (1) and the locking element (2).
10. Combination according to claim 9, characterised in that the intrusion detectors (3) are connected with each other in an electrically conductive manner.
11. Use of an electrically conductive long prismatic body as an intrusion detector (3) in a combination according to one of claims 1 to 10, characterised in that under stress crosswise to its longitudinal direction, the body has the mechanical fracture behaviour of a brittle body.
12. Use according to claim 11, characterised in that the electrical conductor is firmly joined together with a supporting body of the brittle material.
13. Use according to claim 12, characterised in that the brittle material itself has no electrical conductivity, and in that the electrical conductor consists of another material.
14. Use according to claim 13, characterised in that the electrical conductor is distributed homogenously within the brittle material in a concentration that establishes conductivity.
15. Use according to claim 13, characterised in that the electrical conductor is applied on the surface of the brittle material.
16. Use according to claim 12, characterised in that the brittle material itself has electrical conductivity and forms the electrical conductor.

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