BURGLARY PROTECTION DEVICE FOR A DOOR

Description

TECHNICAL FIELD

[0001] The present invention relates to an anti-burglary device for a door. STATE OF THE ART

[0002] To prevent break-ins, exterior doors are usually fitted with mechanical burglar protection. This is often limited to the use of multiple locking points, whereby closing the door lock does not just activate a lock bolt, but rather extends several bolts distributed across the height of the door. The underside of the door is hardly given any consideration in burglar protection. Even if a drop-down seal is present, it is relatively easy to gain access to the interior of the building from the underside of the door. For example, a wire can be pushed up through the gap between the door leaf and the floor to the door handle, or a camera pushed through the gap can provide a view of the building's interior. Any drop-down seal that may be present can be easily lifted beforehand using a suitable lever tool, e.g. a goat's foot.In addition, a door can be forced open using a lever tool. DE 199 05 209 A1 discloses an anti-burglary device for windows and doors. A pivotally mounted bar slides downward along a frame when the sash is closed. The bar runs at an angle when the window is closed. DE 295 17 077 U1 shows a security door with a locking means arranged in the door leaf, which engages in a recess in the door frame. WO 94 / 17276 A1 shows a floor-side sealing device for doors with a tilting element and a trigger element arranged on the floor in the form of a dome or a depression. The device serves to protect against weather conditions. EP 2 302 158 A2 discloses an anti-burglary device according to the preamble of claim 1, a pivoting lever, and an actuator which form an anti-burglary device. PRESENTATION OF THE INVENTION

[0003] It is therefore an object of the invention to provide a mechanical burglar protection which optimally protects the underside of a door.

[0004] This object is achieved by an anti-burglary device having the features of claim 1 and an anti-burglary unit having the features of claim 11.

[0005] The inventive burglar protection device for a door comprises a sturdy security strip for attachment to a door leaf and for closing a gap between the door leaf and a floor. The security strip can be pivoted from a raised position into a secured position and fixed in this secured position, wherein the security strip closes a gap between the door leaf and a floor in the secured position. The security strip has a wall which, in the secured position, runs approximately, preferably exactly, vertically.

[0006] The security strip thus closes the gap between the door leaf and the floor, preventing intrusion into the building's interior thanks to its secure attachment. The term "floor" includes not only building floors, but also door thresholds, the lower parts of door frames, and similar components.

[0007] The term "locks" in this text means that the lowering bar rests on the floor or ends at such a minimal distance from the floor that this distance is impenetrable by conventional burglary tools. The same applies to the term "attached." Here, too, a minimal gap may be present, which, however, prevents penetration.

[0008] In the following, terms such as "attack side" and "non-attack side" are used. "Attack side" is the side from which unauthorized access to a building or room is to be achieved. Typically, the "attack side" is the building's exterior. The opposite side of the door is therefore the "non-attack side," which usually corresponds to the building's interior. In the following, the terms "building exterior," "outside," "outside," "building interior," "inside," "inside," and similar terms are also used. These terms are to be understood broadly in this text, so they are not limited to exterior and interior sides, but generally encompass "attack side" and "non-attack side."

[0009] The term "door" also includes windows and gates and similar means for closing openings in buildings.

[0010] Depending on the design, the burglar protection device can be fixed in place so that it can no longer be pivoted or lifted when the door is closed. Preferably, at least one locking element is provided. Different types of locking elements can be used to prevent the security strip from pivoting or lifting when the door leaf is closed. According to the invention, a spacer is provided which rests against the door leaf and / or the door frame in the secured position. The actuating mechanism of the burglar protection device is designed, for example, in such a way that an element moving when the door leaf is closing cannot be lifted and cannot be moved back without moving the door leaf. Spacers can be used as spacers which prevent the security strip from pivoting by an angle greater than the predetermined one. The predetermined pivot angle is preferably 90°.In addition, the threshold can be designed in such a way that it makes access to the safety strip difficult or impossible when the door leaf is closed and / or that it prevents the safety strip from being lifted or pivoted when the door leaf is closed.

[0011] The threshold is preferably designed in such a way that it appears barrier-free to authorized users, especially wheelchair users, people with walking difficulties, and elderly people, and does not pose an obstacle when driving or walking. This accessibility can be achieved, for example, by ensuring that the elevations and depressions of the threshold are relatively low and, in particular, that the horizontal extent of the depressions is relatively small compared to the size of a wheelchair wheel or an adult's foot.

[0012] In preferred embodiments, however, the burglar protection device has a locking unit that prevents the security strip from being lifted or pivoted when the door leaf is closed. These embodiments ensure complete burglar protection even with flat thresholds.

[0013] The burglar protection device can be designed very simply and with a minimal number of components. In a preferred embodiment, for example, it has a longitudinal axis on which the security strip is pivotably mounted, and wherein fastening means are provided for attaching the longitudinal axis to the door leaf. Preferably, the security strip is automatically pivoted or lowered when the door leaf is closed, i.e., regardless of whether the door is locked or not. For this purpose, a simple mechanism is preferably provided which returns the security strip to the raised pivot position, preferably when the door leaf is opened. This movement preferably takes place by means of at least one return spring.

[0014] The burglar protection device therefore preferably has a trigger element for attachment to a frame of the door, which automatically triggers the pivoting of the security strip from the raised position to the securing position when the door leaf is closed.

[0015] In preferred embodiments, the safety strip can be automatically pivoted into the safety position against a spring force when the door leaf is closed and can be automatically brought into the raised position due to the spring force when the door leaf is opened.

[0016] Preferably, the trigger element is a stop, with a transmission element arranged on the safety strip. When the door leaf closes, the transmission element rests against the trigger element and is movable along it, pivoting the safety strip from the raised position to the locking position. This allows the safety strip to be activated using the simplest mechanical means, while the protective device is designed to be sufficiently robust to withstand attempted break-ins.

[0017] In some embodiments, the door frame itself serves as the triggering element. In these embodiments, the burglar protection device preferably has a transmission element that protrudes on one or both sides of the front of the security strip. The triggering element preferably corresponds to the actuating button protruding from the front, as is known from known automatic drop-down seals. In these embodiments, the actuating button is preferably operatively connected to the longitudinal axis, or it is firmly connected to the longitudinal axis, or it is an integral extension thereof. A pin is preferably present that protrudes from the longitudinal axis or the actuating button and penetrates a spiral groove in the security strip. If the actuating button is pressed when the door leaf is closed, the security strip pivots downwards. When the door leaf is opened, it pivots upwards again.Alternative mechanisms, such as other worm gears, can also be used. Preferably, a compressive force is converted into a rotational movement. Such mechanisms are known for simple, non-burglar-proof flaps on the underside of doors, for example, from DE 20 2007 010 288 U1.

[0018] In other preferred embodiments, the trigger element has a downward-facing sliding surface. The transmission element is movable along this sliding surface, and when the door leaf is closed, its upper side rests against this sliding surface, so that the safety strip is fixed in the locking position. This, too, is a very effective, robust, and cost-effective design.

[0019] Preferably, the upper side of the transmission element is flat. Alternatively or additionally, the sliding surface is flat, with an upwardly curved initial region.

[0020] To fix the fuse block in its position, a spacer is provided, which is preferably attached to the fuse block and which preferably protrudes vertically from the fuse block.

[0021] To optimize burglary protection, the threshold is also adapted accordingly. A burglar protection unit for a door therefore comprises the burglar protection device described above and a threshold. The threshold has a step rising toward the interior of the building, and the security strip is positioned in a secure position in front of or behind the step when the door leaf is closed.

[0022] This means that an additional chicane is built into the floor, which prevents the attachment of a goat's foot and represents an insurmountable obstacle to the insertion of a wire.

[0023] When the door leaf is closed, the safety strip can be positioned in front of or behind the step in the direction from the attack side or the outside of the building to the non-attack side or the inside of the building.

[0024] If the safety strip is arranged in front of the step, it preferably rests against the step. The threshold preferably has a sloping surface that slopes downwards in front of the step and ends at the step. The step and the sloping surface preferably define a recess in the threshold.

[0025] In some embodiments, the lower end face of the safety strip is straight. In other embodiments, it is provided with notches or protruding elements on the front. For example, it is toothed, with points or rounded teeth.

[0026] In some embodiments, the threshold has a flat surface in the region of the securing position of the safety strip, preferably in front of the step. In other embodiments, it has upwardly directed elevations and / or downwardly directed depressions. The safety strip is preferably located above these elevations and / or depressions in its securing position.

[0027] If the security strip has the aforementioned non-rectilinear lower end face, these are preferably designed so that, in the secured position, they engage with the elevations and / or depressions of the threshold. Preferably, together with these, they form a barrier that is almost or completely closed to the attack side. These embodiments optimally prevent the burglar's tool, in particular a wire, from being displaced laterally in the event of an attack.

[0028] Should an intruder succeed in piercing the security strip and overcoming the step of the threshold, the notches or the protruding elements on the front still prevent the burglary tool, such as the wire, from moving sideways.

[0029] Further embodiments are specified in the dependent claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] A preferred embodiment of the invention is described below with reference to the drawings, which are for illustrative purposes only and are not to be construed as limiting. In the drawings: Figure 1 shows a representation of a threshold and a lower part of an opened door leaf with an anti-burglary device according to the invention, Figure 2 shows a perspective representation of the anti-burglary device and threshold according to Figure 1 without depiction of the door leaf, but with door frame, with a safety strip in a raised initial position; Figure 3 the unit according to Figure 2 with partially pivoted safety bar; Figure 4 the unit according to Figure 3 with the safety bar in a lowered safety position; Figure 5 the unit according to Figure 1 during the closing of the door leaf with the safety bar partially pivoted; Figure 6 the unit according to Figure 1with the door leaf closed and the safety strip in a lowered securing position; Figure 7 shows a part of the safety strip; Figure 8 shows a cross-section through the raised safety strip and part of the door leaf; Figure 9 shows a perspective view of a part of the safety strip seen from a non-attack side; Figure 10 shows a perspective view of another part of the safety strip with a first height adjustment; Figure 11 shows a perspective view according to Figure 10 with a second height adjustment; Figure 12 a perspective view of another embodiment of a threshold and an anti-burglary device according to the invention in the raised starting position; Figure 13 the embodiment according to Figure 12 in a second perspective view; Figure 14 a perspective view of the embodiment according to Figure 12 in the lowered securing position and Figure 15 the embodiment according to Figure 14 in a second perspective view. DESCRIPTION OF PREFERRED EMBODIMENTS

[0031] In Figure 1 The lower section of a pivoting door leaf F is visible. The door leaf F is preferably part of an exterior door. One side of the door leaf F is therefore directed toward an attack side A, in this case, an exterior side of the building, and the opposite side of the door leaf F is directed toward a non-attack side I, in this case, an interior side of the building.

[0032] The underside of the door leaf F is directed toward a threshold 1, which is embedded in the building floor or mounted on it. The threshold 1 is preferably made of a metal, in particular steel.

[0033] According to the invention, a burglar protection device is provided. It has a trigger element 2, which in this example is attached to a Figure 2It is fixed, preferably screwed, to the door frame R shown in FIG. Furthermore, it has a transmission element 3, a safety strip 4 and a longitudinal axis 6. Preferably, a height adjustment element 5 is also provided. These components are shown in Figure 1 clearly visible.

[0034] The longitudinal axis 6 preferably extends over the entire width of the door leaf F. It is fastened by means of at least one fastening means 8 in the groove N of the door leaf F, as shown for example in the Figures 4 , 7 and 9 Alternatively, it can also be attached to a groove-free underside of the door leaf or to a lower section of a door panel.

[0035] The fastening means 8 preferably comprises a curved 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 numeral 82 in the figures. The curved part of the metal rail encompasses the longitudinal axis 6.

[0036] Preferably, two or more such fastening means 8 are arranged along the longitudinal axis 6. They are arranged at a distance from one another, with the securing strip 4, or more precisely curved sections in the form of hinge rollers 40, projecting into the gaps. The hinge rollers 40 also engage around the longitudinal axis 6. The longitudinal axis 6 is pivotally held in the fastening means 8 and is preferably firmly connected to the securing strip 4. When the longitudinal axis 6 pivots, the securing strip 4 pivots along with it.

[0037] The security strip 4 is of sturdy construction. It is preferably made of metal, in particular steel. It is preferably thick enough to withstand burglary tools. 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 aforementioned fastening means 8 is arranged. The wall 41 preferably extends across the entire width of the door leaf F and preferably across the entire length of the longitudinal axis 6.

[0038] The downwardly projecting free end of the wall 41 is preferably connected to the height adjustment element 5. In this example, the height adjustment element 5 forms a pocket which is plugged onto 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 to the threshold 1 when the sealing strip is lowered and to adjust it on site. Preferably, the combined length of the wall 41 plus the height adjustment element 5 is adjusted so that the securing strip 4 ends at only a minimal distance from the threshold 1 in the secured position. 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 inserted between them.

[0039] In one embodiment, the height adjustment element 5 is also made of metal or another rigid material. In other embodiments, it is soft and also serves as a damping element. Suitable materials include rubber, silicone, and plastic.

[0040] Typically, the element 5 is placed on the wall 41 and fixed in its desired position relative to the wall 41 by means of at least one screw 7. If it serves exclusively as a damping element and not for adjusting the gap size, it can also be glued to the wall, sprayed onto it, or otherwise connected to it.

[0041] 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. In Figure 10 such a spacer rod 44 is inserted, in Figure 11 there are two spacer bars 44.

[0042] On the wall 41, a spacer 43 is arranged, as is preferably shown in the Figures 5 and 7 to 9. It is preferably located in the middle or upper region, preferably above the height adjustment element 5, if present. The spacer 43 is preferably designed as a cuboid-shaped strip that extends perpendicularly from the wall 41. It can be the same length as the wall or be arranged only at one or both ends of the wall 41. The spacer 43 rests against the door frame, preferably on the thick rebate, and forms a positive fit.

[0043] Between the hinge rollers 40 and the fastening means 8, there is preferably a 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 located on the underside of the door leaf. A second free end 92 of the spring 9 is located on the wall 41. This is shown in the Figures 8 and 9 clearly visible.

[0044] Furthermore, the transmission element 3 is arranged at one or both ends of the fuse strip 4. Here, too, the Figures 5 and 7The transmission element 3 is T-shaped, with a first leg 30 and a second leg 31. The first leg 30 preferably runs off-center over the second leg 31. The second leg 31 is screwed to the wall 41 or secured thereto in some other way. It runs along the wall 41 to the hinge roller 40. The first leg 30 runs above the hinge roller 40 and preferably rests on it or is arranged adjacent to it.

[0045] The transmission element 3 interacts, as explained below, with the trigger element 2. This is attached to the door frame, as shown in the Figures 2 to 4is clearly visible. It has a mounting plate 20, which is screwed or otherwise attached to the door frame. A flag in the form of a downwardly projecting arm 21 and the guide 22 molded onto it are integrally connected to the mounting plate 20. The guide 22 has a free end whose front and underside are curved. It forms a downwardly directed, uniform surface for the transmission element 3.

[0046] The Figures 1 and 2show the burglar protection device with the door open. The security strip 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 stationary trigger element 2. It is pivoted about the longitudinal axis 6 and with it the security strip 4. The wall 41 is pivoted downwards, the height adjustment element 5 ends at a minimum distance above the floor or the threshold or, depending on the setting of the device, rests on it. The minimum distance is such that a wire cannot be pushed under the security strip 4 and there is also no sufficient surface for a lever tool to engage.

[0047] Thanks to the soft, dampening material of the height adjustment element 5, this is done relatively silently. The lowering is in the Figures 3 and 5shown. The Figures 4 and 6 show the lowered state, ie the safety bar 4 is in a vertical safety position. As in Figure 6 As can be seen, the spacer 43 rests in this position against the door frame R and / or the inner underside of the door leaf F. Preferably, the spacer 43 is continuous across the entire width of the door leaf and protrudes slightly from the door leaf on both sides so that it can rest against the thick rebate. If the door leaf is opened again, the transmission element 3 is released by the trigger element 2, and the return springs 9 pivot the safety strip 4 back upward into the raised position.

[0048] Other types of lowering or pivoting mechanisms can also be used. For example, a mechanism can be used that activates the security strip regardless of the door leaf's position. In some designs, the door leaf can be closed without activating the burglar alarm device.

[0049] The safety strip 4 is preferably pivoted downwards by approximately 90° into a vertical position, more preferably by exactly 90°, and rests approximately on a threshold or floor. Preferably, as explained above, there is a minimal gap between the threshold or floor and the lower end of the safety strip 4.

[0050] In a simple embodiment, the safety strip 4 rests on a normal threshold or floor, or it ends at a minimal distance from it. That is, its counterpart is formed by a flat or slightly upwardly curved surface.

[0051] In preferred embodiments, however, the floor threshold 1 is also specially designed and, together with the burglar protection device, forms a common burglar protection unit.

[0052] Based on the Figures 1 , 5 and 6 The interaction of threshold 1 and security strip 4 of the burglar protection device can be clearly seen.

[0053] The threshold 1 has an outer threshold area 10 facing the attack side, or the building exterior, which is flat and horizontal. It transitions into a downwardly inclined surface 11, which ends in an abrupt step 13 with a vertical wall. The step 13 leads to an inner threshold area 14, which faces the non-attack side, or the building interior. This area 14 is also flat and horizontal. It preferably runs at the same height as the outer threshold area 10.

[0054] 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 downwards 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 securing position, it ends at a minimal distance in front of the step 13 or it rests against the step 13. The step 13 forms a further obstacle that prevents a wire from being inserted into the interior of the building or a goat's foot from being used as a lever.

[0055] Other forms of speed bumps can also be used.

[0056] In the Figures 12 to 14A further embodiment of the burglar protection device according to the invention is shown. Identical parts are designated by the same reference numerals as in the embodiments described above. The security strip 4 again has hinge rollers 40 and a wall 41, wherein the wall 41 is preferably formed integrally with the hinge rollers 40.

[0057] In this example too, the longitudinal axis 6 preferably extends over the entire width of the door leaf F. It is preferably fastened by means of at least one fastening means 8 in the groove N of the door leaf F, as is shown, for example, in the Figures 4 , 7 and 9 shown in the embodiment described above. Alternatively, it can also be attached to a groove-free underside of the door leaf or to a lower area of ​​a door panel.

[0058] As in the previous example, the hinge rollers 40 surround the longitudinal axis 6. In contrast to the embodiment described above, the hinge roller 40 is now preferably pivotably mounted on the longitudinal axis 6.

[0059] The hinge roller 40 has a spiral groove 46. This spiral groove 46 is penetrated by a pin 60, which is firmly 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' projecting from the front of the door leaf F. The connection can be fixed, detachable, or an operative connection. When the door leaf F is closed, the actuating button 3' is pressed in, and the longitudinal axis 6 is displaced in the longitudinal direction. Due to the pin, its axial guide (not shown here), and the spiral groove 46, the safety strip 4 is pivoted until it reaches the locking position. In this process, a spring arranged between the hinge roller 40 and the longitudinal axis 6 is tensioned. When the door leaf F is opened again, the actuating button 3' is released, and the safety strip 4 is raised back to its original position thanks to the restoring force of the spring. Figures 12 and 13show the starting position, the Figures 14 and 15 the securing position.

[0060] The security strip 4 is also designed to be sturdy in this embodiment. It is preferably made of metal, in particular steel. It is preferably thick enough that it cannot be bent with burglar tools. Unlike the previous embodiment, the downwardly projecting free end of the wall 41 is not straight. Rather, the lower end has notches 45 or protruding elements. In this embodiment, it is toothed.

[0061] The threshold 1 is formed with elevations 15. These elevations 15 are preferably located on the attack side just before the step 13. They preferably extend into the inclined surface 11. The elevations 15 preferably have a shape that matches the incisions 45 in the securing strip 4; i.e. they have mutually complementary shapes, wherein the joined shapes touch one another or form a gap between them. In this example, they therefore have an upwardly directed edge. They form a row of teeth. The edges of the teeth preferably run horizontally. Preferably, the elevations 15 with the incisions 45 form an almost closed, possibly a completely closed barrier. Preferably, there is a distance between the elevations 15 and the incisions 45 so that the noise pollution is minimized when the door leaf is closing.

[0062] This design of the lower end face of the security strip 4 already prevents a burglar's tool from shifting longitudinally along 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 further optimizes burglary protection.

[0063] The device according to the invention offers effective and cost-effective mechanical burglary protection for doors. LIST OF REFERENCE SYMBOLS 1 speed bump 46 spiral groove 10 outer threshold area 11 inclined surface 5 Height adjustment element 13 Level 14 inner threshold area 6 Longitudinal axis 15 Surveys 60 Pen 2 trigger element 7 screw 20 Mounting plate 21 arm 8 Fasteners 22 backdrop 80 screw 82 through hole 3 transmission element 3` Operating button 9 Return spring 30 first legs 90 first free end 31 second leg 91 Round body 92 second free end 4 fuse strip 40 Hinge rollers A Attack side 41 Wall I Non-aggression side 42 Window F door leaf 43 spacers R door frame 44 spacer rod N Nut 45 incisions

Claims

1. Break-in protection device for a door, wherein the break-in protection device comprises a stable securing bar (4) for fastening to a door leaf (F) of the door and for closing a gap between the door leaf (F) and a floor (1), wherein the securing bar (4) can be pivoted from a raised position into a securing position and can be fixed in this securing position, wherein the securing bar (4) closes a gap between the door leaf (F) and a floor (1) in the securing position, wherein the securing bar (4) has a wall (41) which extends in an approximately vertical direction in the securing position, characterized in that a spacer (43) is arranged on the wall (41) and in that the spacer (43) abuts the door leaf (F) and / or the door frame (R) in the securing position.

2. Break-in protection device according to Claim 1, wherein the break-in protection device has a fixing unit which prevents raising and pivoting of the securing bar when the door leaf is closed.

3. Break-in protection device according to either of Claims 1 and 2, wherein the securing bar (4) can be automatically pivoted into the securing position counter to a spring force when the door leaf (F) is being closed and can be automatically brought into the raised position owing to the spring force when the door leaf (F) is being opened.

4. Break-in protection device according to one of Claims 1 to 3, wherein the break-in protection device has a longitudinal axis (6) on which the securing bar (4) is pivotably arranged, and wherein fastening means (8) for fastening the longitudinal axis (6) to the door leaf (F) are present.

5. Break-in protection device according to one of Claims 1 to 4, wherein the break-in protection device has a triggering element (2) for fastening to a frame (R) of the door, which triggering element automatically triggers the pivoting of the securing bar (4) from the raised position into the securing position when the door leaf (F) is being closed.

6. Break-in protection device according to Claim 5, wherein the triggering element (2) is a stop and wherein on the securing bar (4) there is arranged a transmission element (3), which abuts the triggering element (2) and can be moved along it when the door leaf (F) is being closed, as a result of which the securing bar (4) pivots from the raised position into the securing position.

7. Break-in protection device according to Claim 6, wherein the triggering element (2) has a downwardly facing sliding surface (22), wherein the transmission element (3) can be moved along this sliding surface (22) and wherein the transmission element (3) abuts this sliding surface (22) by way of an upper side of the transfer element (3) when the door leaf (F) is closed and as a result fixes the securing bar in the securing position.

8. Break-in protection device according to Claim 7, wherein the upper side of the transmission element (3) has a flat form and / or wherein the sliding surface (22) has a flat form and has an upwardly extending, curved starting region.

9. Break-in protection device according to one of Claims 1 to 8, wherein the spacer (43) of the securing bar (4) protrudes perpendicularly.

10. Break-in protection device according to one of Claims 1 to 9, wherein the securing bar (4) has a lower end face which has recesses (45) and / or protruding elements.

11. Break-in protection unit for a door, wherein the break-in protection unit has a floor sill (1) and a break-in protection device according to one of Claims 1 to 10, wherein the floor sill (1) has a step (13), which rises towards a non-attack side, and wherein the securing bar (4) is arranged in front of or behind the step (13) in a securing position when the door leaf (F) is closed.

12. Break-in protection unit according to Claim 11, wherein the securing bar (4) is arranged in front of the step (13) in the direction of the non-attack side when the door leaf (F) is closed.

13. Break-in protection unit according to either of Claims 11 and 12, wherein the securing bar (4) abuts the step (13) or is arranged adjacent to it.

14. Break-in protection unit according to one of Claims 11 to 13, wherein the floor sill (1) has an oblique surface (11) which is inclined downwards in front of the step (13) and ends at the step (13).

15. Break-in protection unit according to Claim 14, wherein the step (13) and the oblique surface (11) define a depression in the floor sill (1).

16. Break-in protection unit according to one of Claims 11 to 15, wherein the floor sill (1) has depressions and / or elevations (15) which are directed towards the securing bar (4) in its securing position.

17. Break-in protection unit according to Claim 16, having a securing bar according to Claim 11, wherein the depressions and / or elevations (15) and the recesses (45) and / or protruding elements have mutually complementing shapes.