Hinge with support head screws

Abstract

In a hinge joint comprising at least two joint sections, a pivot bolt pivotally connecting the joint sections, and at least two support screws, at least one of the joint sections has a contact surface in which at least two cups are formed to receive the support heads of the support screws. The depth of the cups is greater than the height of the support heads, and each cup has at least one undercut extending from its contact surface. The undercuts of the cups serve as receiving areas for at least partially receiving the support heads of the support screws.

Description

[0001] The invention relates to a hinge band with at least two band parts, a pivot bolt connecting the band parts in a pivotable manner, and at least two support head screws, wherein at least one of the band parts has a contact surface in which at least two cups receiving the support heads of the support head screws are formed.

[0002] In known hinges of this type, the hinge components consist of a frame hinge component for attachment to a door frame and a sash hinge component for attachment to a door leaf. The support screws serve to absorb the weight forces transmitted to the door frame via the hinges. To secure the frame hinge component to the door frame, it has at least two screw holes concealed behind the sash hinge component. Conversely, to secure the sash hinge component to a door leaf, the sash hinge component can also have at least two screw holes concealed behind the frame hinge component. If the hinge components are separated by removing the pivot pin, all screw holes and thus the locking screws inserted into them are freely accessible. However, removing the pivot pin from the hinge is only possible when the door leaf is open.In the case of a locked door, burglary attempts therefore aim to use a burglary tool to get into the joining gap formed on the contact surface of one of the hinge parts and to tear off the fastening screws screwed into the door frame or door leaf via the screw holes using leverage.

[0003] European patent application EP 3 854 968 A1 describes a generic roller hinge for doors made of plastic or wood, comprising a sash hinge part, a frame hinge part 1, and a pivot bolt that pivotally connects the hinge parts. The frame hinge part 1 has a contact surface 3 in which at least two cups 5 are formed to receive the support heads 6 of support head screws 7. For positive locking of the frame hinge part 1 onto the support head screws 7, the frame hinge part 1 has threaded bores 10 leading laterally into the cups 5 to receive set screws 11, wherein the set screws 11 and undercuts 9 formed on the support heads 6 interact positively.Other hinge arrangements are known from international application WO 2019 / 161845 A1, British patent GB 1 004 195 A, European application EP 3 680 432 A1, international application WO 2013 / 026648 A1 and European application EP 1 310 622 A1.

[0004] The invention is based on the objective of demonstrating a hinge band of the aforementioned type with which the burglar-resistant effect of a locked door is significantly increased.

[0005] This problem is solved according to the invention by the features of claim 1. Advantageous embodiments of the invention are specified in the dependent claims.

[0006] The hinge band according to the invention is characterized in that the depth of the cups is greater than the height of the support heads of the support head screws, that the cups, starting from their contact surface, each have at least one undercut, and that the undercuts of the cups are designed as receiving areas for at least partial reception of the support head screws.

[0007] The undercuts thus function as locking mechanisms, allowing at least one of the hinge parts to be positively locked onto the support heads of the support screws. To lock one of the hinge parts, it is first moved relative to the door frame or door leaf in such a way that the support heads of the support screws engage in the cups of the respective hinge part. In a second relative movement, the hinge part and the door frame or door leaf are moved vertically against each other, so that the support heads of the support screws engage in the undercuts of the cups, creating a robust locking mechanism. Consequently, the resistance when driving a burglary tool into the gap formed between the hinge part and the door frame or between the hinge part and the door leaf is significantly increased.

[0008] According to the invention, the undercuts formed in the pots are T-slots for engaging the support heads, which function as T-nuts. To ensure optimal positive locking, the T-slots have negative molds at their ends furthest from the pots, which partially replicate the support head screws. This results in the formation of maximally large clamping surfaces between the undercuts of the pots and the support heads of the support head screws.

[0009] According to the invention, the T-slots each have at least one crescent-shaped groove opening in the contact surface. However, it is within the scope of the invention to extend the T-slot so that the groove opening has a cross-sectional area corresponding to a surface swept transversely by the crescent shape.

[0010] To further enhance the burglar-resistant effect of a locked door with the hinge according to the invention, the support head screws each have at least two differently shaped shaft sections, wherein only the lower shaft section has a thread, and the upper shaft section has a length corresponding to the opening width of the jamb surface formed at the groove opening. Preferably, the gap formed between the upper shaft section and the jamb surface of the groove opening is reduced to a hairline gap in the form of an joining gap. Consequently, the lower shaft section is the part of the support head screw that projects outwards from the contact surface of one of the hinge parts.

[0011] To further improve the burglar-resistant effect of the hinge according to the invention, at least the diameter of the upper shaft section corresponds to the maximum opening width of the T-slots. The diameter of the lower shaft section can be larger or smaller compared to the diameter of the upper shaft section, with a shoulder formed between the shaft sections advantageously being located precisely in the joint gap between the hinge part and the door frame or the hinge part and the door leaf.

[0012] According to a further embodiment of the invention, the hinge section, designed as a frame hinge component, has a pivot bearing consisting of two bearing blocks, in which the pivot pin is supported via its free pin ends. If the hinge has such a two-part pivot bearing, it is referred to as a three-part hinge, the third part of which, arranged between the two parts of the pivot bearing, is a wing hinge component.

[0013] If the hinge is designed in three parts, the part designed as the frame hinge preferably has at least two screw holes arranged between its two bearing blocks and extending through its contact surface. These screw holes accommodate countersunk screws, which are used to fix the frame hinge part to the door frame via undercuts on the support heads of the screws. The screw holes preferably have a countersink that completely accommodates the screw heads of the countersunk screws.

[0014] For a concealed installation of the hinge component, designed as a wing hinge part, in the door rebate of a door leaf, it is proposed that the wing hinge component have a hinge flap for screwing into a hardware groove insert. In its basic form, this insert is a T-profile section made of an aluminum alloy and serves to create a screw connection between the wing hinge component and a plastic frame profile, which has so-called Euro-style hardware grooves, that is as pull-out resistant as possible. An embodiment of the invention, from which further inventive features become apparent, is shown in the drawing.

[0015] The single figure shows a perspective view of an embodiment of the hinge according to the invention in an exploded view. The hinge comprises a hinge part 1 for attachment to a door frame, a hinge part 2 for attachment to a door leaf, a pivot bolt 3 pivotally connecting the hinge parts 1 and 2, and four support head screws 4, 5, 6, 7. The hinge parts 1, 2 each have a contact surface 8, 9 in which two cups 14, 15, 16, 17 are formed to receive the support heads 10, 11, 12, 13 of the support head screws 4, 5, 6, 7.The depth of the pots 14, 15, 16, 17 is greater than the height of the support heads 10, 11, 12, 13. The pots 14, 15, 16, 17 each have an undercut 18, 19, 20, 21 extending from the contact surfaces 8, 9 of their band section 1,2, wherein all these undercuts 18, 19, 20, 21 are designed as receiving areas for the partial receiving of the support heads 10, 11, 12, 13 of the support head screws 4, 5, 6, 7. The undercuts 18, 19, 20, 21 formed in the pots 14, 15, 15, 17 of the band sections 1, 2, create T-slots for capturing the support heads 10, 11, 12, 13 which function as T-nuts. This results in a crescent-shaped groove opening in the contact surfaces 8, 9 of each T-slot.The support head screws 4, 5, 6, 7 each have two differently shaped shank sections, with only the lower shank section 22, 23, 24, 25 being threaded, and the upper shank section 26, 27, 28, 29 each having a length corresponding to the opening width of the reveal surfaces 30, 31, 32, 33 formed at the groove openings. The diameter of the upper shank sections 26, 27, 28, 29 corresponds to the maximum opening width of the T-slots. While the diameter of the lower shaft sections 22, 23 of the support head screws 4, 5 is smaller than that of the upper shaft sections 26, 27, 28, 29, the diameter of the lower shaft sections 24, 25 of the support head screws 6, 7 corresponds approximately to that of the upper shaft sections 26, 27, 28, 29. The band section 1, designed as a frame band section, has a pivot bolt bearing consisting of two bearing blocks 34, 35, in which the pivot bolt 3 is supported via its free bolt ends.Furthermore, the band section 1, designed as a frame band section, has two screw holes 36, 37 arranged between its two bearing blocks 34, 35 and extending through its contact surface 8. The band section 2, designed as a wing band section, has a pivot pin bearing consisting of a single bearing block 38 in which the pivot pin 3 is centrally mounted. Furthermore, the band section 2, designed as a wing band section, has two screw holes 39, 40 extending through its contact surface 9, between which the bearing block 38 is arranged.

Claims

1. Hinge having at least two hinge parts, a pivot pin connecting the hinge parts in a pivotable manner, and at least two support head screws, wherein at least one of the hinge parts has a contact surface, in which at least two cups receiving the support heads of the support head screws are formed, wherein the depth of the cups is greater than the height of the support heads, the cups, starting from their contact surface, respectively having at least one undercut, the undercuts of the cups are being formed as receiving areas for at least partially receiving the support heads of the support head screws, and T-slots are being formed, the undercuts formed in the cups of at least one of the hinge parts are designed as T-slots for capturing the support heads as slot nuts, characterized in that in the contact surface (8, 9) the T-slots respectively have at least one slot opening, formed in the shape of a crescent moon, the support head screws (4-7) respectively have at least two differently designed shaft sections, wherein only the lower shaft section (22-25) has a thread, the upper shaft sections (26-29) has a length which corresponds to the opening depth of the reveal surface (30-33) formed at the slot opening, and the upper shaft section (26-29) has a diameter which corresponds to the maximum opening width of the T-slots.

2. Hinge according to claim 1, characterized in that the hinge part (1) designed as a frame hinge part has a pivot pin bearing consisting of two bearing blocks (34, 35), in which pivot pin bearing the pivot pin (3) is mounted via its free pin ends.

3. Hinge according to one of claims 1 to 2, characterized in that the hinge part (1) designed as a frame hinge part has at least two screw connection holes (36, 37) arranged between its two bearing blocks (34, 35) and passing through its contact surface (8).

4. Hinge according to claim 3, characterized in that the hinge part (2) designed as a wing hinge part has a hinge loop for screwing to a fitting groove insert.

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