WO2020007789A1

WO2020007789A1 - Intruder protection device for a door

Info

Publication number: WO2020007789A1
Application number: PCT/EP2019/067580
Authority: WO
Inventors: Andreas Dintheer; Andreas Brändle
Original assignee: Planet Gdz Ag
Priority date: 2018-07-02
Filing date: 2019-07-01
Publication date: 2020-01-09
Also published as: WO2020007788A1; EP3818234A1; EP3818233A1

Abstract

An intruder protection device for a door has a stable securing strip (4) for fastening to a door leaf (F) and for sealing a gap between the door leaf (F) and a floor (1). The securing strip (4) can be moved from a raised position into a securing position and can be fixed in said securing position, the securing strip (4) sealing a gap between the door leaf (F) and a floor (1) when in the securing position. The device according to the invention provides effective and inexpensive mechanical intruder protection for doors.

Description

TITLE

BURGLAR PROTECTION FOR A DOOR

TECHNICAL AREA

The present invention relates to a burglar protection device for a door.

STATE OF THE ART

To prevent break-ins, external doors are usually provided with mechanical break-in protection. This is often limited to the use of several locking points, whereby not only one lock bolt is actuated when the door lock is closed, but several bolts distributed over the height of the door are moved out. Little attention is paid to the underside of the door when protecting against burglary. On the underside of the door, even with a lowering seal, access to the interior of the building can be made in a relatively simple manner. For example, a wire can be pushed up to the door handle through the gap between the door leaf and the floor, or a camera pushed through the gap can provide an insight into the interior of the building. Any existing lowering seal can be easily removed beforehand using a suitable lever tool, e.g. a goat's foot. A door can also be broken open using a lever tool.

PRESENTATION OF THE INVENTION

It is therefore an object of the invention to provide a mechanical burglar protection which optimally protects the underside of a door.

This object is achieved by an intruder protection device with the features of claim 1 and an intrusion protection unit with the features of claim 12. The burglar protection device according to the invention for a door has a stable security strip for fastening to a door leaf of the door and for closing a gap between the door leaf and a floor. The securing strip can be pivoted from a raised position into a securing position and can be fixed in this securing position, the securing strip closing a gap between the door leaf and a floor in the securing position. The securing strip preferably has a wall which, in the securing position, runs in an approximately, more preferably in exactly the vertical direction.

The safety strip thus closes a gap between the door leaf and the floor and, thanks to its fixation, prevents it from penetrating into the interior of the building. The term “floor” includes not only building floors but also door thresholds, lower parts of a door frame and similar components.

In this text, the term “closed” is understood to mean that the lowering bar lies on the floor or ends at such a minimal distance from the floor that this distance cannot be penetrated by conventional burglary tools. The same applies to the term "is present". There may also be a minimal gap here, but this prevents penetration.

Terms such as “attack side” and “non-attack side” are used below. "Attack side" is the side from which unauthorized access to a building or a room is to be created. Usually the "attack side" is the outside of the building. The opposite side of the door is therefore the "non-attack side", which usually corresponds to the inside of the building. In the text below, the terms "building exterior", "exterior", "exterior", "building interior", "interior", "interior" and the like are also used. They are to be understood broadly in this text, so that they are not limited to outside and inside pages, but generally include “attack side” and “non-attack side”.

The term “door” also includes windows and gates and similar means for closing building openings. Depending on the embodiment, the burglar protection device can be fixed in that it can either no longer be pivoted or raised when the door is closed. At least one locking element is preferably present. Different types of locking elements can be used, which prevent pivoting or lifting of the safety bar when the door leaf is closed. For example, the actuation mechanism of the burglar protection device is designed in such a way that an element that moves when the door leaf is closed cannot be raised and cannot be moved back without moving the door leaf. Additionally or alternatively, stop or spacers can be used which prevent the safety bar from pivoting by a greater than the predetermined angle. The predetermined pivot angle is preferably 90 °. As an alternative or in addition, the threshold can be designed in such a way that it makes access to the safety bar difficult or impossible when the door leaf is closed and / or that it prevents the safety bar from being raised or pivoted when the door leaf is closed.

The threshold is preferably designed in such a way that it appears to be barrier-free for the authorized user, in particular for wheelchair users, handicapped people and the elderly and does not constitute an obstacle when driving or walking on it. This training suitable for the disabled can be achieved, for example, by the fact that the elevations and depressions of the threshold are relatively low and, in particular, the horizontal extent of the depressions is relatively small compared to the size of a wheelchair wheel or an adult's foot.

In preferred embodiments, however, the burglary protection device has a fixing unit which makes it impossible both to lift and to pivot the security strip when the door leaf is closed. These embodiments guarantee complete protection against burglary even on level sleepers.

The burglar protection device can be designed very easily and with a minimal number of components. In a preferred embodiment, it has, for example, a longitudinal axis on which the securing strip is pivotably arranged, and fastening means for fastening the longitudinal axis to the door leaf are present. Preferably, the safety bar is automatically pivoted or lowered when the door leaf is closed, ie regardless of whether the door is locked or not. For this purpose, a simple mechanism is preferably provided, which preferably leads the safety bar back into the raised pivot position when the door leaf is opened. This movement is preferably carried out by means of at least one return spring.

The intrusion protection device therefore preferably has a release element for attachment to a frame of the door, which automatically triggers the pivoting of the security strip from the raised position into the security position when the door leaf is closed.

In preferred embodiments, the securing strip can be pivoted automatically against the spring force into the securing position when the door leaf is closed, and can automatically be brought into the raised position due to the spring force when the door leaf is opened.

The trigger element is preferably a stop, a transmission element being arranged on the securing strip, which is in contact with the trigger element when the door leaf is closed and is movable along the latter, as a result of which the securing strip is pivoted from the raised position into the securing position. As a result, the security strip can be actuated with the simplest mechanical means, the protective device, however, being so solid that it can withstand an attempted break-in.

In some embodiments, the door frame itself serves as a release element. In these embodiments, the burglar protection device preferably has a transmission element which protrudes on one or both sides at the end face of the security strip. The trigger element preferably corresponds to the actuating button protruding on the end side, as is known from known automatic lowering seals. In these embodiments, the actuation button is preferably operatively connected to the longitudinal axis or it is fixedly connected to the longitudinal axis or it is a one-piece Extension of the same. There is preferably a pin which projects from the longitudinal axis or the actuation button and penetrates a spiral groove in the fuse strip. If the operating button is pressed in when the door leaf is closed, the safety bar swings down. When the door leaf is opened, it is swung up again. Alternative mechanisms, such as other worm gears, can also be used. A compressive force is preferably converted into a rotational movement. Such mechanisms are known for simple flaps on the underside of doors that are not protected against burglary protection, for example from DE 20 2007 010 288 Ul.

In other preferred exemplary embodiments, the trigger element has a sliding surface directed downwards. The transmission element can be moved along this sliding surface and, when the door leaf is closed, there is an upper side against this sliding surface, so that the securing strip is fixed in the securing position. This is also a very effective, robust and inexpensive training.

The upper side of the transmission element is preferably flat. As an alternative or in addition, the sliding surface is flat, with an upwardly curved starting area.

A spacer is preferably provided to fix the fuse strip in its position, which is attached to the fuse strip and which protrudes vertically from the fuse strip.

The threshold is also adjusted accordingly to optimize burglary protection. A burglar protection unit for a door therefore includes the burglar protection device described above and a threshold. The threshold has a step rising towards the inside of the building and the safety bar is arranged in a safety position in front of or behind the step when the door leaf is closed.

As a result, a baffle is also installed in the floor, which prevents a goat's foot from attaching and represents an obstacle to the insertion of a wire that cannot be bridged. When the door leaf is closed, the safety bar can be moved in the direction from the attack side or the building exterior to the non-attack side or to

Arrange the inside of the building before or after the step.

If the safety bar is arranged in front of the step, it is preferably on the step. The threshold preferably has an inclined surface which slopes downwards in front of the step and ends at the step. The step and the inclined surface preferably define a depression in the threshold.

In some embodiments, the lower end face of the fuse strip is straight. In other embodiments, it is provided with incisions or protruding elements on the end face. For example, it is serrated, with pointed or rounded teeth.

In some embodiments, the threshold has in the range of

Securing position of the fuse strip, preferably in front of the step, on a flat surface. In other embodiments, it has upward elevations and / or downward depressions. The securing strip is preferably in its securing position above these elevations and / or depressions.

If the fuse strip has the non-rectilinear lower end face mentioned above, then these are preferably designed so that they are in the

Engage the securing position in the elevations and / or depressions in the threshold. Together with these, they preferably form a barrier that is approximately or completely closed toward the attack side. These embodiments optimally prevent a lateral displacement of the

Burglary tool, especially a wire, can be done.

If an intruder succeeds in piercing the security bar and overcoming the threshold, the cuts or the elements protruding on the end face nevertheless prevent the intrusion tool from moving sideways, for example the wire.

Further embodiments are specified in the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

A preferred embodiment of the invention is based on the

Described drawings, which are used only for explanation and are not to be interpreted restrictively. The drawings show:

Figure 1 is a representation of a threshold and a lower part of an open door leaf with a burglar protection device according to the invention;

Figure 2 is a perspective view of the burglar protection device and

Threshold according to Figure 1 without showing the door wing, but with a door frame, with a safety bar in a raised starting position;

3 shows the unit according to FIG. 2 with the fuse strip partially pivoted;

4 shows the unit according to FIG. 3 with the fuse strip in a lowered position

Securing position;

FIG. 5 shows the unit according to FIG. 1 during the closing of the door wing with the safety strip partially pivoted;

6 shows the unit according to FIG. 1 with the door leaf closed with the

Safety bar in a lowered safety position;

FIG. 7 shows part of the fuse strip according to the invention; Figure 8 shows a cross section through the raised safety bar and part of the door leaf;

Figure 9 is a perspective view of part of the fuse strip from a

Seen from the non-attack side;

FIG. 10 shows a perspective illustration of a further part of the safety strip with a first height adjustment;

Figure 11 is a perspective view according to Figure 10 with a second

Height adjustment;

FIG. 12 shows a perspective illustration of a further embodiment of a threshold according to the invention and a burglary protection device according to the invention in the raised starting position;

FIG. 13 shows the embodiment according to FIG. 12 in a second perspective

Presentation;

FIG. 14 shows a perspective illustration of the embodiment according to FIG. 12 in the lowered securing position and

FIG. 15 shows the embodiment according to FIG. 14 in a second perspective

Presentation.

DESCRIPTION OF PREFERRED EMBODIMENTS

1 shows a lower region of a pivotable door leaf F. The door leaf F is preferably part of an outer door. One side of the door leaf F is therefore directed towards an attack side A, here an outside of the building, and the opposite side of the door leaf F to a non-attack side I, here an inside of the building. The underside of the door leaf F is directed towards a threshold 1, which is embedded in or placed on the floor of the building. The threshold 1 is preferably made of a metal, in particular steel.

According to the invention, a burglar protection device is present. It has a release element 2, which in this example is fixed, preferably screwed, to a door frame R shown in FIG. It also has a transmission element 3, a securing strip 4 and a longitudinal axis 6. A height adjustment element 5 is preferably also present. These components are clearly visible in Figure 1.

The longitudinal axis 6 preferably extends over the entire width of the door leaf F. It is fastened in the groove N of the door leaf F by means of at least one fastening means 8, as is shown, for example, in FIGS. 4, 7 and 9. Alternatively, it can also be attached to a groove-free underside of the door leaf or to a lower area of a door leaf.

The fastening means 8 preferably comprises a bent metal rail with a flat flange which is fastened to the underside of the door leaf F by means of screws 80. The through holes for the screws 80 are provided with the reference symbol 82 in the figures. The bent part of the metal rail comprises the longitudinal axis 6.

Preferably two or more such fasteners 8 are arranged along the longitudinal axis 6. They are arranged at a distance from one another, the securing strip 4, more precisely curved sections in the form of hinge rollers 40, projecting into the spaces. The hinge rollers 40 also encompass the longitudinal axis 6. The longitudinal axis 6 is pivotally held in the fastening means 8 and is preferably fixedly connected to the securing strip 4. When the longitudinal axis 6 is pivoted, the securing strip 4 also pivots.

The fuse strip 4 is stable. It preferably consists of metal, in particular steel. It is preferably designed to be thick enough to fit with Does not allow burglary tools to bend. It has a wall 41, which is preferably integrally formed on the hinge rollers 40 and connects them to one another. Between the hinge rollers 40 there are thus windows 42, in each of which one of the fastening means 8 is arranged. The wall 41 preferably extends over the entire width of the door leaf F and preferably over the entire length of the longitudinal axis 6.

The downward free end of the wall 41 is preferably connected to the flea adjustment element 5. In this example, the height adjustment element 5 forms a pocket which is attached to the free end of the wall 41. The height adjustment element 5 forms an adjustable extension of the free end of the wall 41 and thus makes it possible to optimize the desired distance from the threshold 1 with the sealing strip lowered and to adjust it on site. The common length of the wall 41 plus height adjustment element 5 is preferably set such that the securing strip 4 ends in the securing position only a minimal distance from the threshold 1. This means that it should preferably not rest on the threshold 1 in order to avoid impact noises. However, the remaining gap should be so small that a wire or a lever tool can no longer be passed between them.

The height adjustment element 5 is also made in one embodiment from a metal or another rigid material. In other embodiments, it is soft and also serves as a damping element. Suitable materials are, for example, rubber, silicone and plastic.

The element 5 is usually plugged onto the wall 41 and fixed in its desired position relative to the wall 41 by means of at least one screw 7. If it is used exclusively as a damping element and not to adjust the gap size, it can also be glued to the wall, sprayed onto it or otherwise connected to it.

To reinforce the extension, a spacer rod 44 can be inserted into a cavity between the free end of the wall 41 and the web of the height adjustment element 5 Push. A spacer rod 44 of this type is inserted in FIG. 10, and two spacer rods 44 are shown in FIG. 11.

A spacer 43 is preferably arranged on the wall 41, as can be clearly seen in FIGS. 5 and 7 to 9. It is preferably located in the middle or upper area, preferably above the height adjustment element 5, if present. The spacer 43 is preferably formed as a cuboid strip which extends perpendicularly away from the wall 41. It can have the same length as the wall or can be arranged only at one or both ends of the wall 41. The spacer 43 is on the door frame, preferably on the thick rebate, and forms a positive connection.

Between the hinge rollers 40 and the fastening means 8 there is preferably an intermediate space, in each of which a return spring 9 is arranged. This spring 9 has a round body 91 which is wound around the longitudinal axis 6. A first free end 90 of the spring 9 is applied to the underside of the door leaf. A second free end 92 of the spring 9 is against the wall 41. This can be clearly seen in FIGS. 8 and 9.

Furthermore, the transmission element 3 is arranged on one or on both ends of the fuse strip 4. Here, too, reference is made to FIGS. 5 and 7. The transmission element 3 is T-shaped, with a first leg 30 and a second leg 31. The first leg 30 preferably does not run centrally over the second leg 31. The second leg 31 is screwed to the wall 41 or in some other way attached to it. It runs along the wall 41 to the hinge roller 40. The first leg 30 runs above the hinge roller 40 and preferably lies on it or is arranged adjacent to it.

The transmission element 3 interacts with the trigger element 2, as explained further below. This is attached to the door frame, as can be clearly seen in FIGS. 2 to 4. It has a fastening plate 20 which is screwed onto the door frame or is fastened to it in some other way. A flag in the form of a downwardly projecting arm 21 and the link 22 formed thereon is integral with the fastening plate 20 connected. The link 22 has a free end, the front and bottom of which is curved. It forms a downward face for the transmission element 3.

Figures 1 and 2 show the burglar protection device with the door open. The safety bar 4 is raised and is held in this raised position thanks to the spring force of the springs 9. If the door leaf F is now closed, the first leg 30 of the transmission element 3 moves along the link 22 of the fixed release element 2. It is pivoted about the longitudinal axis 6 and with it the safety bar 4. The wall 41 is pivoted downwards, the height adjustment element 5 ends at a minimal distance above the floor or the threshold or, depending on the setting of the device, rests on this or this. The minimum distance is such that a wire cannot be pushed under the securing strip 4 and no sufficient contact surface is formed for a lever tool.

Thanks to the soft, damping material of the height adjustment element 5, this is done relatively quietly. The lowering is shown in Figures 3 and 5. Figures 4 and 6 show the lowered state, i.e. the fuse strip 4 is in a vertical securing position. As can be seen in Figure 6, the spacer 43 is in this position on the door frame R and / or on the inner underside of the door leaf F. The spacer 43 is preferably designed to be continuous over the entire width of the door leaf and it protrudes slightly on both sides of the door leaf so that it can rest against the thick rebate. If the door leaf is opened again, the transmission element 3 is released again by the release element 2 and the return springs 9 pivot the safety bar 4 back up into the raised position.

Other types of lowering or pivoting mechanisms can also be used. For example, a mechanism can be used which actuates the safety bar regardless of the position of the door leaf. In some embodiments, the door leaf can also be closed without the burglar protection device being actuated. The fuse strip 4 is preferably pivoted downward by approximately 90 ° into the vertical position, more preferably by exactly 90 °, and lies approximately on a threshold or a floor. As stated above, there is preferably a minimal gap between the threshold or floor and the lower end of the securing strip 4.

In a simple embodiment, the fuse strip 4 lies on a normal threshold or floor or ends at a minimal distance from this or this. That its counterpart is formed by a flat or slightly curved surface.

In preferred embodiments, however, the threshold 1 is also specially designed and, together with the burglary protection device, forms a common burglary protection unit.

The interaction of threshold 1 and security strip 4 of the burglary protection device can be clearly seen from FIGS. 1, 5 and 6.

The threshold 1 has an outer threshold area 10 facing the attack side or the building outside, which is flat and runs horizontally. It merges into a downward sloping surface 11 which ends in an abrupt step 13 with a vertical wall. Step 13 leads to an inner threshold area 14 which faces the non-attack side or the inside of the building. This area 14 is again flat and horizontal. It preferably runs on the same fleas as the outer threshold area 10.

When the door leaf F is closed or when the pivoting mechanism of the safety strip 4 is actuated, the safety strip 4 now pivots downward along the inclined surface 11 into the depression of the threshold 1. When the door leaf F is closed or when the safety strip 4 has reached its vertical safety position, it ends it is at a minimum distance before level 13 or is at level 13. Level 13 forms a further obstacle, which prevents a wire from being inserted into the interior of the building or a goat's foot being used as a lever. Other types of thresholds can also be used.

FIGS. 12 to 14 show a further embodiment of the burglar protection device according to the invention. The same parts are denoted by the same reference numerals as in the above-described embodiments. The securing strip 4 in turn has hinge rollers 40 and a wall 41, the wall 41 preferably being formed in one piece with the hinge rollers 40.

In this example too, the longitudinal axis 6 preferably extends over the entire width of the door leaf F. It is preferably fastened in the groove N of the door leaf F by means of the at least one fastening means 8, as is shown, for example, in FIGS. 4, 7 and 9 of the above described embodiment is shown. Alternatively, it can also be attached to a groove-free underside of the door leaf or to a lower area of a door leaf.

As in the previous example, the hinge rollers 40 surround the longitudinal axis 6. In contrast to the exemplary embodiment described above, the hinge roller 40 is now preferably pivotably mounted on the longitudinal axis 6.

The hinge roller 40 has a spiral groove 46. This spiral groove 46 is penetrated by a pin 60 which is fixedly connected to the longitudinal axis 6. The longitudinal axis 6 is connected to a transmission element, here in the form of an actuating button 3 'protruding from the front of the door leaf F. The connection can be fixed or detachable or an active connection. If the door leaf F is closed, the actuating button 3 'is pressed in and the longitudinal axis 6 is displaced in the longitudinal direction. Because of the pin, its axial guide, not shown here, and the spiral groove 46, the fuse strip 4 is pivoted until it has reached the securing position. A spring, which is arranged between the hinge roller 40 and the longitudinal axis 6, is tensioned. If the door leaf F is opened again, the actuation button 3 'is released again and the safety bar 4 is raised again to its starting position thanks to the restoring force of the spring. Figures 12 and 13 show the starting position, Figures 14 and 15 the securing position. The fuse strip 4 is also stable in this embodiment. It preferably consists of metal, in particular steel. It is preferably so thick that it cannot be bent with burglary tools. In contrast to the previous exemplary embodiment, the free end of the wall 41 which projects downward is not rectilinear. Rather, the lower end face has incisions 45 or protruding elements. In this embodiment, it is toothed.

The threshold 1 is formed with ridges 15. These elevations 15 are preferably located on the attack side shortly before step 13. They preferably extend into the inclined surface 11. The elevations 15 have a shape which preferably matches the incisions 45 of the fuse strip 4; i.e. they have mutually complementary forms, the mutually joined forms touching one another or forming a gap between them. In this example, they therefore have an upward edge. They form a row of teeth. The edges of the teeth are preferably horizontal. Preferably, the ridges 15 with the incisions 45 form an approximately closed, possibly a completely closed barrier. There is preferably a distance between the elevations 15 and the incisions 45 so that the noise pollution is minimized when the door leaf is closed. The design of the lower end face of the safety strip 4 already prevents a burglary tool from being moved in the longitudinal direction of the protective device. The same applies to the special design of the threshold 1. The combination of such a threshold 1 with such a security strip 4 additionally optimizes the protection against burglary.

The device according to the invention offers effective and inexpensive mechanical burglary protection for doors. LIST OF REFERENCE NUMBERS

Threshold 46 spiral groove

0 outer threshold range

1 inclined surface 5 height adjustment element 3 step

4 inner threshold area 6 longitudinal axis

5 bumps 60 pin

Release element 7 screw

0 mounting plate

1 arm 8 fasteners 2 link 80 screw

82 through hole

transmission element

‘Actuation button 9 return spring

0 first leg 90 first free end 1 second leg 91 round body

92 second free end

fuse strip

0 hinge rollers A attack side

1 wall I non-attack side 2 window F door leaf

3 spacers R door frame

Spacer rod N groove

5 cuts

Claims

1. burglar protection device for a door, the burglar protection device having a stable security strip (4) for attachment to a door leaf (F) of the door and for closing a gap between the door leaf (F) and a floor (1), the security strip (4 ) can be pivoted from a raised position into a securing position and can be fixed in this securing position, the securing strip (4) closing a gap between the door leaf (F) and a floor (1) in the securing position.

2. Burglary protection device according to claim 1, wherein the security strip (4) has a wall (41) which extends in the security position in an approximately vertical direction.

3. Burglary protection device according to one of claims 1 or 2, wherein the burglary protection device has a fixing unit which makes it impossible to lift and pivot the security strip when the door leaf is closed.

4. Burglar protection device according to one of claims 1 to 3, wherein the

Safety strip (4) can be swiveled automatically against the spring force into the securing position when the door leaf (F) is closed, and can automatically be brought into the raised position due to the spring force when the door leaf (F) is opened.

5. Burglar protection device according to one of claims 1 to 4, wherein the

Burglar protection device has a longitudinal axis (6), on which the security strip (4) is pivotably arranged, and fastening means (8) for fastening the longitudinal axis (6) to the door leaf (F) are provided.

6. Burglar protection device according to one of claims 1 to 5, wherein the

Burglar protection device has a release element (2) for attachment to a frame (R) of the door, which automatically triggers the pivoting of the security strip (4) from the raised position to the security position when the door leaf (F) is closed.

7. Burglary protection device according to claim 6, wherein the trigger element (2) is a stop and wherein on the security bar (4) a transmission element (3) is arranged, which is present when the door leaf (F) closes on the trigger element (2) and is movable along this is, whereby the pivoting of the fuse block (4) from the raised position to the securing position.

8. Burglar protection device according to claim 7, wherein the trigger element (2) has a downward sliding surface (22), the transmission element (3) being movable along this sliding surface (22) and wherein the transmission element (3) with the door leaf (F) closed with an upper side of the transmission element (3) on this sliding surface (22) and thereby fixes the safety bar in the securing position.

9. Burglary protection device according to claim 8, wherein the upper side of the transmission element (3) is flat and / or wherein the sliding surface (22) is flat and has an upwardly curved starting area.

10. Burglar protection device according to one of claims 1 to 9, wherein on the security bar (4) a spacer (43) is attached, which protrudes the security bar (4) vertically.

11. Burglary protection device according to one of claims 1 to 10, wherein the security strip (4) has a lower end face which has incisions (45) and / or protruding elements.

12. Burglar protection unit for a door, the burglar protection unit having a threshold (1) and a burglary protection device according to one of claims 1 to 11, wherein the threshold (1) has a step (13) rising towards a non-attacking side and wherein the security strip (4 ) is arranged in a securing position with the door leaf (F) closed, in front of or behind the step (13).

13. Burglar protection unit according to claim 12, wherein the security strip (4) is arranged with the door leaf (F) closed in the direction of the non-attack side in front of the step (13).

14. Burglar protection unit according to one of claims 12 or 13, wherein the

Safety bar (4) on the step (13) is present or is arranged adjacent to it.

15. Burglar protection unit according to one of claims 12 to 14, wherein the

The threshold (1) has a sloping surface (11) which is inclined downwards in front of the step (13) and ends at the step (13).

16. Burglar protection unit according to claim 15, wherein the step (13) and the inclined surface (11) define a recess in the threshold (1).

17. Burglar protection unit according to one of claims 12 to 16, wherein the

Has threshold (1) towards the safety ledge (4) in its securing position towards depressions and / or elevations (15).

18. Burglar protection unit according to claim 17, with a security strip according to claim 11, wherein the depressions and / or elevations (15) and the incisions (45) and / or protruding elements have mutually complementary shapes.