Secure door arrangement

Abstract

The present invention relates to a door arrangement (1) comprising a door (2) and a door frame (3). The door comprises a first door plane portion (10) and a second door plane portion (20), both door plane portion extending along an extension plane of the door. The door comprises a lock having a lock housing (30) arranged inside the second door plane portion (20) of the door. The first door plane portion (10) has a thickness of at least 35 mm. The first door plane portion has an outer side surface (11) facing the direction towards which the door is opened when being opened relative to the door frame. The door frame comprises a first portion (40), a second portion (50) and a third portion (60), each having a first side (41, 51, 61) facing in a direction in parallel with the extension plane of the door, and a second side (42, 52, 62) facing in a direction perpendicular to the extension plane of the door. The door arrangement comprises a security member (70) having a first security member part (71) arranged at a first door frame facing side (12) of the first door plane portion (10) of the door and a second security member part (72) arranged at the first side (41) of the first portion (40) of the door frame, wherein the two security member parts (71, 72) are configured to interact with each other to prevent opening of the door if the door is moved relative to the door frame in a direction perpendicular to the opening direction of the door.

Description

Technical Field

[0001] The present disclosure relates to a door arrangement, and especially to a door arrangement related with improved security functions.Background

[0002] An important security problem in both resident and commercial buildings is the risk of burglary into the apartments, houses, offices etc. There is an ongoing development of locks, latch systems and hinges in order to decrease this problem and to obstruct efforts to pry open doors. However, providing a door with a very complex lock to improve security may be a costly measure to take.

[0003] A common way to pry open a door, which is locked to a door frame with a latch, is to force the door away from the door frame part which the latch is connected to, and towards the door frame part where the door is connected via hinges, for instance by means of a crowbar. The latch is followingly exposed to a stress from which it eventually may break. One way to counteract this problem is to produce latches with higher strength and / or more sophisticated locking connections between the door and the door frame. Another way is to have a plurality of locking latches on the door. This may however increase cost and complexity for the door installation.

[0004] Consequently, there is a need for an improved security function for doors which do not require complex and expensive locks.Summary

[0005] It is an object of the present invention to provide an improved solution that alleviates the mentioned drawbacks with present devices. Furthermore, it is an object to provide a cost-efficient solution for a secure door.

[0006] The invention is defined by the appended independent claims, with embodiments being set forth in the appended dependent claims, in the following description and in the drawings.

[0007] According to a first aspect of the invention a door arrangement is provided comprising a door and a door frame relative to which the door can be opened and closed, and to which the door can be locked. The door comprises a lock having a lock housing arranged inside the door and a lock member configured to extend out of the lock housing to engage with the door frame. The door comprises a first door plane portion and a second door plane portion, both door plane portion extending along an extension plane of the door. A thickness of the door is provided by the combined thicknesses of the first and second door plane portions. The first door plane portion has a thickness of at least 35 mm. The first door plane portion has an outer side surface facing the direction towards which the door is opened when being opened relative to the door frame, and the second door plane portion has an inner side surface facing in a direction opposite to the outer side surface. The first and second door plane portions each has a first door frame facing side, each facing towards the door frame. The first door frame facing side of the first door plane portion extends further towards the door frame than the first door frame facing side of the second door plane portion by a first extension distance being at least 10 mm. The lock housing is arranged inside the second door plane portion at the first door frame facing side of the second door plane portion and the lock member is configured to extend through the first door frame facing side of the second door plane portion to engage with the door frame. The door frame comprises a first portion, a second portion and a third portion, each having a first side facing in a direction in parallel with the extension plane of the door, and a second side facing in a direction perpendicular to the extension plane of the door. The first side of the first portion of the door frame is configured to face towards the first door frame facing side of the first door plane portion, and the first side of the second portion of the door frame is configured to face towards the first door frame facing side of the second door plane portion and to receive the lock member. The first portion has a thickness of at least 35 mm. The second side of the second portion of the door frame is configured to face towards an inner side surface of the first door plane portion, and the second side of the third portion of the door frame is configured to face towards the inner side surface of the second door plane portion. The door arrangement further comprises a security member having a first security member part arranged at the first door frame facing side of the first door plane portion of the door and a second security member part arranged at the first side of the first portion of the door frame, wherein the two security member parts are configured to interact with each other to prevent opening of the door if the door is moved relative to the door frame in a direction perpendicular to the opening direction of the door.

[0008] By the present invention a door arrangement is provided with a high level of security while the door lock may not need to be of an advanced type. With the lock housing being arranged in the second door plane portion, being the inner plane portion of the door, and the first plane portion being at least 35 mm thick and provided with a security member part configured to interact with a corresponding security member part on the door frame, a high level security for the door may be achieved. Such door arrangement may be certified for a security rating of at least RC3. Since no complex lock is required to achieve this security level, the door arrangement further is cost-efficient, especially for a door arrangement of such security level.

[0009] The first door plane portion, extending further towards the door frame than the second door plane portion, may extend as a flange outside an edge of the second door plane portion. Besides restricting access to the lock member from outside the door, the configuration of such flange may provide a sealing functionality between the door and the door frame. A gap may be formed between the door and the door frame. One or more sealing members may be provided in the gap, attached either to the door or to the door frame, or both. The first door plane portion may form a rabbet of the door.

[0010] At an opposite side of the door, at which side the door may be suspended by hinges to the door frame, the hinges may be attached to the first door plane portion of the door. Preferably the hinges may be attached to a door frame facing side of the first door plane portion, which side may face the door frame at the hinge side. The hinges may not be attached to the second door plane portion. At the hinge side of the door, the door plane portions and the portions of the door frame may have corresponding configuration as at the side of the door comprising the lock and the security member.

[0011] The security member may have different configurations in different embodiments, with the common functionality of the two security member parts being capable of interacting to prevent opening of the door at situations when the door is moved in the wrong direction. This may be when the door is moved relative to the door frame, away from the door frame, in a direction perpendicular to the opening direction. For instance, if a crowbar is used for a try to bend open the door, the door will move slightly sideways, which may cause the security member parts to interact with each other. When interacting, the security member parts may engage such that they cannot be separated in the direction of the opening direction of the door. Unauthorized opening of the door may thereby be prevented. Alternatively, the interaction of the two security member parts may comprise a deformation of at least one of the two security member parts, caused by the movement of the door in a direction other than the opening direction. Such deformation may cause separation of the two security member parts to be prevented.

[0012] The security member may along a vertical extension of the door and the door frame be located at a corresponding position as the lock.

[0013] The door arrangement may comprise one, two, three, four, or more security members, each comprising a first security member part and a second security member part, attached to the door and the door frame, respectively.

[0014] The first security member part may be attached to the first door frame facing side of the first door plane portion by means of at least one screw. The screw may be a long screw, being at least 70 mm, at least 80 mm, or at least 100 mm, extending into the door in parallel with the extension plane of the door. The screw may provide a large strength of the attachment of the first security member part to the first door plane portion, making it difficult to apply such large force to the security member that the first security member part would be removed from the door.

[0015] The second security member part may be attached to the first portion of the door frame by means of at least one screw. The screw may additionally extend through the door frame and into a wall to which the door frame is arranged. The screw may be a long screw, being at least 70 mm, at least 80 mm, or at least 100 mm. The screw may provide a large strength of the attachment of the second security member part to the door frame and optionally the wall, making it very difficult to apply such large force to the security member that the second security member part would be removed from the door frame.

[0016] The thickness of the portions of the door frame may be measured along a direction perpendicular to the extension plane of the door when the door is closed. The thickness of the door frame may be constituted by the combined thicknesses of the first, second and third portions of the door frame. The combined thickness of the first and second portions may be substantially equal or slightly larger than the thickness of the door.

[0017] The second sides of the second and third portions may each have a width in a plane in parallel with the door plane portions of the door of at least 10 mm

[0018] The thickness of the second door plane portion may be at least 25 mm, or at least 35 mm, or between 25-40 mm. The second door plane portion may be slightly thinner than the first door plane portion, but thick enough to house the lock housing.

[0019] The first portion of the door frame may have a thickness of at least 35 mm. The thickness of the first portion may be substantially equal to the thickness of the first door plane portion. The thickness of the portions of the door frame may be measured in a direction in parallel with the opening direction of the door, or in a direction perpendicular to the extension plane of the door.

[0020] The security member parts may in a first position relative to each other enable opening of the door relative to the door frame along the opening direction, and in a second position relative each other, wherein the first security member part has been moved in a direction along the extension plane of the door away from the door frame relative to the first position, may engage with each other such that opening of the door relative to the door frame is prevented. When someone is trying to pry open a door with e.g. a crowbar, the door will move sideways, away from the door frame. The security member part may be configured to engage with each other when the door is moved in such a way, to prevent the door from being opened. The security member thereby together with the lock may provide two locking points, making the door very difficult to pry open.

[0021] A first cover plate may be arranged on the outer side surface of the door and a second cover plate may be arranged on the inner side surface of the door. The first and second cover plates may be connected to each other by means of fastening means extending through the first and second door plane portions. The cover plates may be metal plates, such as steel plates. The cover plates may cover substantially corresponding areas of the respective side surfaces. The two cover plates may be of substantially the same size. The cover plates may be provided to strengthen door when being exposed to a force, such as during an attempt for unauthorized opening. The fastening means may be screws extending between the two cover plates through the door. The cover plates may in a vertical direction extend over at least the whole length of the lock housing. Preferably the cover plates may extend both above and below the vertical extension of the lock housing.Brief Description of the Drawings

[0022] The invention will in the following be described in more detail with reference to the enclosed drawings, wherein: Fig. 1 shows a cross-sectional top view of a door arrangement according to an embodiment of the invention. Fig. 2 shows a cross-sectional top view of a door frame according to an embodiment of the invention. Fig. 3 shows a cross-sectional top view of a door arrangement according to an embodiment of the invention. Fig. 4 shows a cross-sectional top view of a door arrangement according to an embodiment of the invention. Fig. 5 shows a side view of a door arrangement according to an embodiment of the invention. Description of Embodiments

[0023] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, like numbers refer to like elements.

[0024] The figures illustrate a door arrangement 1 comprising a door 2 and a door frame 3. The door 2 is constituted by a first door plane portion 10 and a second door plane portion 20. The first door plane portion 10 has an outer side surface 11, which also constitute an outer surface of the door 2. The first and second door plane portions 10, 20 extend in parallel to the outer surface of the door 2. Put differently, the first and second door plane portions 10, 20 extend along or in parallel with an extension plane of the door 2. When opening the door 2 relative to the door frame 3, the door 2 is moved in a direction A1. The outer side surface 11 is facing in the direction A1.

[0025] The first door plane portion 10 has a first thickness T1 of at least 35 mm. The second door plane portion 20 has a second thickness T2. The second thickness T2 may be at least 25 mm, or at least 35 mm, or between 25-40 mm. The first and second thicknesses T1, T2 together provide the thickness of the door 2.

[0026] A lock housing 30 is arranged in the second door plane portion 20. From the lock housing 30 a lock member 32 is configured to extend to be received by the door frame 3.

[0027] The first and second door plane portions 10, 20 each have a first door frame facing side 12, 22. The first door frame facing sides 12, 22 may both face a direction in parallel with the extension plane of the door 2. Along the extension plane of the door 2, the first door frame facing side 12 of the first door plane portion 10 extends further towards the door frame 3 than the first door frame facing side 12 of the second door plane portion 20, by a distance D1 of at least 10 mm. The distance D1 may be between 10-12 mm, between 10-15 mm, or between 10-20 mm. The further extension of the first door plane portion with the distance D1 may form a second door frame facing side 13 of the first door plane portion 10. The second door frame facing side 13 of the first door plane portion 10 may face in a direction perpendicular to the extension plane of the door 2.

[0028] The first and second door plane portions 10, 20 may be formed out of wood or wood material, such as solid wood, plywood, MDF, HDF, or a combination thereof. In some embodiments, the first and second door plane portions 10, 20 may, at least partly, be integrated formed out of the same material. The part of the first door plane portion 10 extending further towards the door frame 3 than the second door plane portion 20 by the distance D1 may be formed out of a first wood material, such as HDF, while the first door plane portion 10 otherwise, at least adjacent to said part, may be formed out of another wood material, such as plywood. The first door plane portion 10, except said extending part, and the second door plane portion 20 may be formed of a common wood material, possibly integrated, such as plywood, and said extending part may be formed another wood material, e.g. HDF.

[0029] The door frame 3 comprises a first portion 40, a second portion 50, and a third portion 60. The first portion 40 comprises a first side 41 facing in a direction in parallel with the extension plane of the door 2 when the door 2 is closed. The first side 41 may face the first door frame facing side 12 of the first door plane portion 10, and may be arranged adjacent thereto when the door 2 is closed. The first portion 40 may comprise a second side 42 facing in a direction perpendicular to the extension plane of the door 2. The second side 42 of the first portion 40 may be in parallel with, and in level with, the outer surface side 11 of the first door plane portion 10 when the door 2 is closed. The first portion 40 has a thickness T4 of at least 35 mm.

[0030] The second portion 50 comprises a first side 51 facing in a direction in parallel with the extension plane of the door 2 when the door 2 is closed. The first side 51 may face the first door frame facing side 22 of the second door plane portion 20, and may be arranged adjacent thereto when the door 2 is closed. The second portion 50 may further comprise a second side 52 facing in a direction perpendicular to the extension plane of the door 2. The second side 52 of the second portion 50 may face towards the second door frame facing side 13 of the first door plane portion 10. The second side 52 of the second portion 50 may be located adjacent to the second door frame facing side 13 of the first door plane portion 10 when the door 2 is closed. The second side 52 has a width D2 in a direction in parallel with the extension plane of the door 2 of at least 10 mm. The width D2 may be between 10-12 mm, between 10-15 mm, or between 10-20 mm. The second portion 50 may have a thickness of at least 25 mm, or at least 35 mm, or between 25-40 mm.

[0031] In the second side 52 of the second portion 50 there may be an opening configured to receive the lock member 32.

[0032] The third portion 60 comprises a first side 61 facing in a direction in parallel with the extension plane of the door 2 when the door 2 is closed. The third portion 60 may further comprise a second side 62 facing in a direction perpendicular to the extension plane of the door 2. The second side 62 of the third portion 60 may face towards the inner side surface 21 of the second door plane portion 20. The second side 62 of the third portion 60 may be located adjacent to the inner side surface 21 of the second door plane portion 20 when the door 2 is closed. The second side 62 has a width D3 in a direction in parallel with the extension plane of the door 2 of at least 10 mm. The width D3 may be between 10-12 mm, between 10-15 mm, or between 10-20 mm. The third portion 60 may have a thickness of at least 15 mm, or at least 25 mm, or between 15-35 mm.

[0033] The door arrangement 1 is further be provided with a security member 70. A first security member part 71 may be arranged in the first door plane portion 10 at the first door frame facing side 12 of the first door plane portion 10. The first security member part 71 may be arranged on the first door facing side 12 of the first door plane portion 10. A second security member part 72 may be arranged on the first portion 40 of the door frame 3. The second security member part 72 may be arranged on the first side 41 of the first portion 40. One or both of the first and second security member parts 71, 72 may protrude from its respective side. The two security member parts 71, 72 are configured to interact with each other in order to prevent unauthorized opening of the door 2. For instance, when an authorized opening of the door 2 is performed, such that the lock member 32 is operated to disengage from the door frame 3, the door 2 may be opened without the security member 70 preventing the opening. The door then opens along direction A1 relative to the door frame 3. However, if someone is trying to make an unauthorized opening of the door 2, for instance by means of a crowbar put into the gap between the door 2 and the door frame 3, the security member 70 may be configured to prevent the door 2 from being opened. The security member 70 may be configured to lock the door 2 to the door frame 3, thereby providing a second locking point between the door 2 and the door frame 3, besides the lock member 32. An improved resistance against unauthorized opening of the door 2 may thereby be provided.

[0034] Such unauthorized opening may cause the door 2 to move relative to the door frame 3 in direction A2, away from the door frame 3. The security member 70 may be configured such that the security member parts 71, 72 may interact with each other when the door is moved in such a way, and in such position prevent the door 2 from being moved in direction A1, to open the door 2.

[0035] Fig. 3 illustrates a door arrangement 1 according to an embodiment including the side of the door 2 being supported by hinges 90 to the door frame 3. The hinge side 2' of the door 2 may have a corresponding configuration of the first and second door plane portions 10, 20 as on the lock side 2" of the door 2. In the same way, the hinge side 3' of the door frame 3 may have a corresponding configuration of the first, second and third portions 40, 50, 60 as on the lock side 3" of the door frame 3. The hinges 90 are attached to the first portion 40 of the door frame 3 and the hinge side 3' thereof, and to the door frame facing side of the first door plane portion 10 at the hinge side 2' of the door 2. The thickness of the first door plane portion 10 enables the hinges 90 to be attached thereto.

[0036] Fig. 4 illustrates an embodiment of the door arrangement wherein the door 2 is provided with a first and a second cover plate 81, 82. The first cover plate 81 is arranged on the outer side surface 11 of the door 2, and the second cover plate 82 is arranged on the inner side surface 21 of the door 2. The two cover plates 81, 82 may be attached to each other by means of screws 83 extending through the door. The screws 83 may in one end be attached to the first cover plate 81 and in another end be attached to the second cover plate 83. As illustrated in fig. 5, the cover plates 81, 82 may extend beyond the lock housing 30 in a vertical direction. The screws 83 may thereby extend through the door 2 above and below the lock housing 30. In a horizontal direction, the cover plates 81, 82 may extend beyond the lock housing in a direction away from the closest door frame 3. The two cover plates 81, 82 may have substantially the same extension area on the respective inner and outer side surfaces 11, 21 of the door 2.

[0037] In the illustrated embodiment, the cover plates 81, 82 are arranged with a distance to the respective ends of the outer side surface 11 and the inner side surface 21, respectively, towards the door frame 3. Alternatively, the first cover plate 81 may extend all the way to the edge of the outer side surface 11 towards the first portion 40 of the door frame 3. Further, the second cover plate 82 may extend all the way to the edge of the inner side surface 21 towards the second portion 50 of the door frame 3. In yet another alternative, the second cover plate 82 may extend all the way to the edge of the inner side surface 21 towards the second portion 50 of the door frame 3, and the first cover plate 81 may extend to a corresponding position on the outer side surface 11, providing a distance between an edge of the first cover plate 81 and the edge of the outer side surface 11. Said distance may substantially correspond to the distance D1.

[0038] The cover plates 81, 82 may provide an improved strength of the door 2 and together with the lock and the security member 70 provide a strong and secure door.

[0039] In the drawings and specification, there have been disclosed preferred embodiments and examples of the invention and, although specific terms are employed, they are used in a generic and descriptive sense only and not for the purpose of limitation, the scope of the invention being set forth in the following claims.

Claims

1. A door arrangement (1) comprising a door (2) and a door frame (3) relative to which the door (2) can be opened and closed, and to which the door can be locked, wherein the door (2) comprises a lock having a lock housing (30) arranged inside the door (2) and a lock member (32) configured to extend out of the lock housing (30) to engage with the door frame (3), wherein the door (2) comprises a first door plane portion (10) and a second door plane portion (20), both door plane portion extending along an extension plane of the door, wherein a thickness of the door (2) is provided by the combined thicknesses (T1, T2) of the first and second door plane portions (10, 20), wherein the first door plane portion (10) has a thickness of at least 35 mm, wherein the first door plane portion (10) has an outer side surface (11) facing a direction towards which the door is opened when being opened relative to the door frame (3), and the second door plane portion (20) has an inner side surface (21) facing in a direction opposite to the outer side surface (11), wherein the first and second door plane portions (10, 20) each has a first door frame facing side (12, 22), wherein the first door frame facing side (12) of the first door plane portion (10) extends further towards the door frame (3) than the first door frame facing side (22) of the second door plane portion (20) by a first extension distance (D1) being at least 10 mm, wherein the lock housing (30) is arranged inside the second door plane portion (20) at the first door frame facing side (22) of the second door plane portion (20) and the lock member (32) is configured to extend through the first door frame facing side (22) of the second door plane portion (20) to engage with the door frame (3), wherein the door frame (3) comprises a first portion (40), a second portion (50) and a third portion (60), each having a first side (41, 51, 61) facing in a direction in parallel with the extension plane of the door (2), and a second side (42, 52, 62) facing in a direction perpendicular to the extension plane of the door (2), wherein the first side (41) of the first portion (40) of the door frame (3) is configured to face towards the first door frame facing side (12) of the first door plane portion (10), the first side (51) of the second portion (50) of the door frame (3) is configured to face towards the first door frame facing side (22) of the second door plane portion (20) and to receive the lock member (32), wherein the first portion (40) has a thickness of at least 35 mm, wherein the second side (52) of the second portion (50) of the door frame (3) is configured to face towards an inner side surface (13) of the first door plane portion (10), and the second side (62) of the third portion (60) of the door frame (3) is configured to face towards the inner side surface (21) of the second door plane portion (20), and wherein the door arrangement further comprises a security member (70) having a first security member part (71) arranged at the first door frame facing side (12) of the first door plane portion (10) of the door (2) and a second security member part (72) arranged at the first side (41) of the first portion (40) of the door frame (3), wherein the two security member parts (71, 72) are configured to interact with each other to prevent opening of the door (2) if the door (2) is moved relative to the door frame (3) in a direction perpendicular to the opening direction (A1) of the door (2).

2. The door arrangement according to claim 1, wherein the thickness (T2) of the second door plane portion (20) is at least 25 mm, or at least 35 mm, or between 25-40 mm.

3. The door arrangement according to claim 1 or 2, wherein the first portion (40) of the door frame (3) has a thickness (T4) of at least 35 mm.

4. The door arrangement according to any one of the preceding claims, wherein the security member parts (71, 72) in a first position relative to each other enable opening of the door (2) relative to the door frame (3) along the opening direction (A1), and in a second position relative each other, wherein the first security member part (71) has been moved in a direction along the extension plane of the door (2) away from the door frame (3) relative to the first position, engage with each other such that opening of the door (2) relative to the door frame (3) is prevented.

5. The door arrangement according to any one of the preceding claims, wherein a first cover plate (81) is arranged on the outer side surface (11) of the door (2) and a second cover plate (82) is arranged on the inner side surface (21) of the door (2), wherein the first and second cover plates (81, 82) are connected to each other by means of fastening means (83) extending through the first and second door plane portions (10, 20).

6. The door arrangement according to any one of the preceding claims, wherein the lock housing (30) and the security member (70) are provided at a lock side (2", 3") of the door (2) and door frame (3), and wherein at a hinge side (2', 3') of the door (2) and door frame (3), opposite said lock side (2", 3"), hinges (90) are attached to the first portion (40) of the door frame (3) and to a door frame facing side of the first door plane portion (10).

7. The door arrangement according to claim 6, wherein the first and second door plane portions (10, 20) and the portions (40, 50, 60) of the door frame (3) at the hinge side (2", 3") have a corresponding configuration as at the lock side (2', 3').

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