Blade of a comb hinge for metal door frames

Abstract

The invention relates to a blade (1) of a comb hinge for metal door frames, the blade (1) being provided with a notch (2) intended to engage under the head of a tightening screw (3) of a complementary cassette (4) so ​​that tightening the screw (3) locks the blade (1) and the cassette (4). According to the invention, the notch (2) defines a path (5) between an opening (6) and a bottom area (7), the bottom area (7) being located lower than the opening (6) with respect to a vertical axis. Figure for the abstract: Fig. 4

Description

Title of the invention: Blade of a comb hinge for metal door frames technical field

[0001] The present invention relates to the field of hardware, in particular hinges for metal door and window frames, and more specifically to comb hinges. This type of hinge is generally used to form the hinge of heavy or technical doors installed in metal frames. Prior art

[0002] Prior art knows of a male blade of a comb hinge for metal frame, provided with a notch intended to engage under a head of a clamping screw of a complementary cassette so that tightening the screw allows the male blade and the cassette to be locked.

[0003] This blade has the disadvantage of being able to let the door fall, i.e. let the male blade of the cassette escape, if the tightening screw is not tightened, for example due to an oversight or insufficient tightening.

[0004] One solution to solve this problem would be to have a hinge without a comb, that is to say with a male blade without a notch, but with an orifice.

[0005] However, this would require installers to remove the screw during installation, which is time-consuming and carries a risk of losing the screw.

[0006] Another known solution on the market consists of a male blade that incorporates an elastomer insert on the fixing blade, in which the notch is formed, improving the clipping and ensuring better retention of the tightening screw. In particular, the notch defines a path between an opening and a bottom area for receiving the tightening screw when the male blade is inserted into the cassette. The opening of said elastomer notch may have a narrowing to increase the clipping effect and thus the retention of the door in case the screw is not tightened or is insufficiently tightened.

[0007] However, this expensive technique does not give complete satisfaction, so the door can still fall. Description of the invention

[0008] One of the aims of the invention is to overcome the disadvantages of the prior art, in particular by proposing a blade of a comb hinge for metal frame aimed at improving the security and reliability of the fixing of a door.

[0009] To this end, a blade of a comb hinge for metal door frames has been developed, that is to say, a blade provided with a notch intended to engage under the head of a clamping screw of an additional cassette so that tightening the screw allows the blade and cassette to be locked.

[0010] According to the invention, the notch in the blade defines a path between an opening and a bottom area, the bottom area being located lower than the opening relative to a vertical axis.

[0011] This configuration ensures reliable blade locking, preventing any unwanted movement. The notch design, in particular, prevents the door from being pulled out, i.e., from being pulled out along a horizontal direction by the cassette screw engaged in the notch to the bottom area.

[0012] In this way, the invention prevents the hinge from falling if the clamping screw is not properly tightened, thus increasing safety during the installation and use of doors equipped with such hinges.

[0013] The notch path can, for example, be straight and inclined downwards from the opening to the bottom, or be curved; the essential thing is to have a low point at the bottom area for receiving the clamping screw in the position of engaging the blade in the cassette.

[0014] According to a preferred embodiment, the notch path includes a baffle between the opening and the bottom area, i.e. a downward deviation from a vertical axis, thus creating a shoulder at the level of the path opening, or otherwise a lower indentation at the level of the bottom of the notch, intended to oppose the withdrawal of a cassette screw.

[0015] The baffle provides reliable mechanical resistance against accidental screw removal, thus increasing installation safety. The shoulder forms a physical barrier that prevents the screw from easily disengaging.

[0016] Preferably, the notch opening is defined between two walls inclined downwards towards the bottom area and relative to a horizontal axis, which facilitates the insertion and guidance of the clamping screw in the bottom area.

[0017] Preferably, the walls of the opening are inclined at an angle between 8° and 15°, for example 8.37°.

[0018] This specifically determined range of angle values ​​optimizes screw guidance, facilitates door installation, and helps prevent accidental screw removal. In particular, it corresponds to the angle at which the blade must be inserted horizontally into the cassette.

[0019] Advantageously, the walls of the opening are parallel so as to ensure uniform guidance of the screw, reducing wear and increasing the durability of the blade and the cassette.

[0020] Preferably, the bottom area of ​​the notch is defined between at least two horizontal walls so as to provide a stable base for the screw in the blade engagement position in the complementary cassette.

[0021] According to a particular embodiment, the base area has an oblong shape to allow for better retention of the screw in the engaged position, since the force required to dislodge the screw must increase. This also allows for horizontal adjustment of the hinge pin axis, and therefore of the door relative to the door frame.

[0022] Advantageously, the notch path includes an upper intermediate face, positioned between the opening and the bottom area, inclined at an angle between 40° and 50°, for example 46.37°, said intermediate face being positioned at the bottom area with respect to a vertical axis.

[0023] The inclination of the intermediate plate facilitates the gradual engagement of the screw in the base area, increasing ease of assembly and safety. The intermediate plate acts as a guide stop for the clamping screw towards the base area.

[0024] This invention provides significant improvements to the safety and durability of hinges for metal frames, in particular by preventing the blade from falling if the clamping screw is not tightened, while also facilitating assembly and increasing the mechanical resistance of the assembly.

[0025] According to a preferred embodiment, the blade has a male configuration and is intended to engage in a complementary female cassette. Brief description of the drawings

[0026] [Fig-1] is a perspective view, rear view of a comb hinge implementing a male blade according to the invention engaged in a complementary cassette.

[0027] [Fig.2] is a view similar to that of [Fig.1], front view.

[0028] [Fig.3] is a front view of the male blade of the invention.

[0029] [Fig.4] is a front view of the male blade of the invention, when engaged in the cassette, the body of the cassette having been masked.

[0030] [Fig.5] is a view similar to that of [Fig.4], the male blade being inserted further into the cassette, with in particular the clamping screw butted against an intermediate upper face of the notch.

[0031] [Fig.6] is a view similar to that of [Fig.4], the male blade being totally inserted into the cassette, with the clamping screw received securely in the bottom area of ​​the notch. Detailed description of the invention

[0032] With reference to figures 1 to 6, the invention relates to a blade (1) of a comb hinge for metal frame intended to be fixed on a metal frame, mainly but not limited to rebated joinery.

[0033] This blade is intended to be used with a complementary cassette (4) to form the hinge of a door, in particular for heavy or technical doors mounted on metal frames.

[0034] According to the embodiment illustrated and described below, the blade (1) has a male configuration and the cassette includes a complementary female configuration, although this is not limiting. Indeed, it is entirely possible to have the male side on the door, even if this is not common practice.

[0035] The male blade (1) is designed with a notch (2) that allows the male blade to be locked under a screw head (3) for clamping a complementary cassette (4). The notch (2) defines a path (5) between an opening (6) and a bottom area (7). The width of the notch (2) is slightly larger than the diameter of the screw.

[0036] According to the invention, the bottom area (7) is located lower than the opening (6) with respect to a vertical axis. This path (5) is designed to guide and hold the screw (3) securely in place by preventing accidental removal of the screw in a horizontal direction.

[0037] According to the particular embodiment illustrated, the notch path (5) includes a baffle (8) between the opening (6) and the bottom area (7). This baffle creates a downward deflection, thus forming a shoulder (9) at the opening of the path. This shoulder is intended to prevent accidental removal of the clamping screw (3), particularly when loosening the screw, thereby increasing the safety of the operation.

[0038] The walls (10, 11) of the notch opening (6) are inclined downwards towards the bottom area (7) relative to a horizontal axis. These walls are specifically inclined at an angle between 8° and 15°, which facilitates the insertion and guidance of the screw towards the bottom area.

[0039] The walls (10, 11) of the opening are preferably parallel, ensuring uniform guidance of the screw and reducing wear on the components.

[0040] From the above, for the introduction of the male blade (1) into the cassette (4), it is necessary to tilt the blade slightly at an angle between 8° and 15° in order to slide the blade horizontally into the cassette until the screw (3) reaches the bottom area, see figures 4 to 6.

[0041] The bottom area (7) is defined between at least two horizontal walls (12, 13), providing a stable base for the screw and preventing any unwanted vertical movement that could cause the clamping screw to come loose.

[0042] The notch path also includes an upper intermediate face (14) between the opening (6) and the bottom area (7). This intermediate face is inclined at an angle between 40° and 50°. This specific angle optimizes guidance; the upper intermediate face (14) acts as a guide stop for the screw towards the bottom area when the male blade is engaged in the cassette.

[0043] In summary, the male blade for metal door frames according to the invention has innovative technical features that significantly improve the safety and reliability of the door fixing. The notch design, with its inclined path, for example with a baffle, ensures optimal retention of the tightening screw, preventing any accidental removal and distributing forces evenly to avoid structural failures.

Claims

Demands

1. Blade (1) of a comb hinge for metal frame, the blade (1) being provided with a notch (2) intended to engage under a head of a clamping screw (3) of a complementary cassette (4) so ​​that tightening the screw (3) allows the blade (1) and the cassette (4) to be locked, characterized in that the notch (2) defines a path (5) between an opening (6) and a bottom area (7), the bottom area (7) being located lower than the opening (6) with respect to a vertical axis.

2. Blade (1) according to claim 1, characterized in that the path (5) of the notch (2) includes a baffle (8) between the opening (6) and the bottom area (7), thus creating a shoulder (9) at the opening (6) of the path intended to oppose the removal of a cassette screw.

3. Blade (1) according to any one of the preceding claims, characterized in that the opening (6) is defined between two walls (10, 11) inclined downwards towards the bottom area (7) and with respect to a horizontal axis.

4. Blade (1) according to claim 3, characterized in that the walls (10, 11) of the opening (6) are inclined at an angle between 8° and 15°.

5. Blade (1) according to any one of claims 3 to 4, characterized in that the walls (10, 11) of the opening (6) are parallel.

6. Blade (1) according to any one of the preceding claims, characterized in that the bottom area (7) is defined between at least two horizontal walls (12, 13).

7. Blade (1) according to any one of the preceding claims, characterized in that the bottom area (7) has an oblong shape.

8. Blade (1) according to any one of the preceding claims, characterized in that the path (5) of the notch (2) comprises an upper intermediate face (14) between the opening (6) and the bottom area (7), inclined at an angle between 40° and 50°, said intermediate face (14) being positioned at the bottom area (7) with respect to a vertical axis.

9. Blade (1) according to any one of the preceding claims, characterized in that it has a male configuration and is intended to engage in a complementary female cassette (4).

Images