FR2829792A3 - Adjustable concealed hinge has two sections enclosed in surrounding frame when door is closed - Google Patents

Abstract

The hinge consists of one section (2) that is fixed inside a hollow frame surrounding the door and a second section with an articulated arm (4) and a stirrup (5) that is fastened to the edge of the door. The stirrup and arm can be adjusted relative to one another by eccentric disc mechanisms (11 - 16) that allow adjustment of the hinge in two orthogonal directions and locking in the required position. When the door is closed both sections of the hinge are enclosed within the surrounding frame.

Description

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The present invention relates to an adjustable hinge made in such a way that, when the door is closed, it is entirely included inside the frame structure, so that it remains completely concealed from view, and in which are present systems which allow easy and rapid adjustment of the hinge in two directions orthogonal to each other, so as to allow easy and precise adjustment of the position of the door relative to the frame.

In the current state of the art, doors and closings in general are supported by two or more hinges which remain visible at least in part.

In addition, for the mounting of armored doors, gates or the like, one generally proceeds by applying in the opening present in the wall a false frame normally constituted by a metallic enveloping structure open in correspondence from the side facing the opening, and then fix the door frame to this false frame.

This traditional construction is often unpleasant aesthetically, especially for doors and closings of a certain value, and in fact the hinges are among the elements that manufacturers have always sought to hide, without success, to prevent them from being views at least as long as the leaf is closed.

In addition, technicians are almost daily confronted with the problem of precise assembly and therefore of just as precise and easy adjustment of the door.

The present invention provides a hinge which, when the door is closed, enters a suitable seat provided

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 in the frame, and which has an eccentric or cam system which allows the position of the door to be perfectly aligned with the frame using a simple key, easily, quickly and safely.

This result is obtained by a hinge constituted by a part mounted inside an enveloping frame integral with the structure of the construction, and by a stirrup applied to the edge of the closure, which constitutes the second part of the hinge and which, during rotation, enters and leaves said enveloping frame by passing through an opening provided corresponding to the side of the frame facing the edge of the closure.

Optional, complementary or alternative characteristics of the invention are set out below: - The hinge comprises a part to be fixed to the frame of the closure, an arm articulated to said part and a stirrup to be fixed on the arm, said stirrup is mounted on said arm, and means are provided for adjusting the mutual positioning of said parts and locking them in the desired position.

- Eccentric means are provided, suitable for moving said stirrup relative to said arm, in two directions orthogonal to each other, screw means being provided, suitable for blocking said elements in the position reached.

- Said eccentric means consist of discs mounted between respective seats in one of said parts, said discs having as many eccentric pins protruding on one side, which fit into a pair of slots formed in the other of said parts, so that, during the rotation of the disc around its own axis, the corresponding part is caused to slide in the direction orthogonal to that of the slot, said slots being elongated and arranged in directions orthogonal to each other.

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- Said discs are inserted between holes in said arm or in said stirrup.

- Said discs have polygonal holes for the insertion of keys to control the rotation of said discs and therefore the adjustment of the hinge.

- There are provided specific means to cooperate with the movable part of the hinge to slow down its movement, when the latter approaches the maximum opening position.

- Said means are constituted by a pair of springs positioned along the path of said movable part of the hinge, adapted to cooperate with said movable part when the latter reaches near the maximum opening limit.

- Said springs cooperate with said movable part of the hinge by an inclined surface, so that the resistance opposed by said springs to the advance of said movable part of the hinge increases as said movable part approaches the limit maximum opening.

- Each spring has a step which indicates by a click the limit of opening of the door.

The characteristics and advantages of the invention will be explained in more detail in the description below, with reference to the accompanying drawings.

Figure 1 is a schematic sectional view along a horizontal plane of the hinge according to the invention and of the supports in which it remains included when the leaf is in the closed position.

Figure 2 is a schematic view of the hinge in a representation similar to the previous but with the leaf in the open position.

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Figure 3 is a perspective view of a hinge according to the invention.

Figures 4 (a, b, c) to 6 (a, b, c) are views of the various components constituting the hinge.

Figures 7 and 8 are views of the hinge adjustment elements shown separately.

Figure 9 shows the adjustment elements of Figures 7 and 8 assembled.

Reference is made to Figures 1 and 2, in which the leaf 22 of the door is mounted on a frame 21, in turn applied to a false frame 19 fixed to the wall 20.

The assembly of the subframe 19 and of the chassis 21 forms an enveloping structure of a shape adapted to cover the total contour of the door opening or the window opening.

In FIG. 3, the reference 1 indicates as a whole the hinge according to the invention, which comprises a fixed part 2 and a mobile part, indicated as a whole by the reference 3, to which the door leaf is fixed.

This movable part, in which the adjustment devices are incorporated, comprises a support or "L" shaped arm 4, which rotates around the fixed part 2, and a stirrup 5 intended to be fixed to the leaf, applied to the arm 4 with possibility adjustment.

The hinge part 2 to be fixed to the chassis is visible in FIGS. 4a to 4c. The arm 4 is visible in detail in FIGS. 5a to 5c. The stirrup 5 is illustrated in FIGS. 6a to 6c.

The arm 4 has a pair of threaded holes 6 for respective screws for fixing the stirrup 5.

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These screws pass through a pair of slots 5 in the stirrup, to allow limited movements of the latter in the vertical direction and in the horizontal direction relative to the arm 4, and are screwed in clamping plates 8 (Figure 2 ) to lock the stirrup 5 with respect to the arm 4.

Also in the arm 4 are present two holes 9 and 10 in which are housed discs 11 and 12 which each have a hexagonal seat 17 for the insertion of a key or the like.

The disc 11 is integral with a spindle 13 which slides inside a horizontal slot 15 present in the stirrup 5.

The disc 12 is integral with a pin 14 which slides inside a vertical slot 16 also present in the stirrup 5.

The rotation of the disc 11 around its own axis causes the vertical displacement of the stirrup 4. Similarly, the rotation of the disc 12 around its own axis causes the horizontal displacement of the stirrup 4.

During these movements the fixing screws move inside the slots 7. The desired position being obtained, the stirrup locks on the arm, by tightening the plate 8 by means of the screws.

According to a characteristic of the invention, the hinge is provided with a braking system which limits the rotation of the arm 4, braking the movement when the latter reaches close to the fully open position of the door.

To this end, the fixed part 2 of the hinge has, at the ends, a pair of projecting fins 30 (FIG. 3), between which the arm 4 passes when the hinge comes into the open position.

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On these fins is inserted a pair of springs 31 formed by harmonic steel blades folded in a U, which have in correspondence of the folded area an inclined edge (Figure 3).

The springs 31 are inserted on the fins 30, by an inclined edge which projects into the zone between the fins, so as to come into engagement with the arm 4 when the latter, approaching the maximum opening position , fits between the fins.

Each spring 30 has a rung, indicated by 32 in the detail of FIG. 3, which signals by a click the limit of opening of the door.

The operation works as follows.

Once the subframe 19 is applied to the wall, the chassis 21 is mounted to which the hinges according to the invention have been fixed beforehand.

Part 2 is made integral with the chassis, for example by fixing it by means of screws or the like. The movable part, constituted by the arm 4 and the stirrup 5, rotates around the axis of the hinge, leaving the chassis through an opening 23 (Figure 2).

Figures 1 and 2 illustrate the hinge respectively in the closed and open positions of the door.

In the first case, as the figures clearly show, the hinge remains completely concealed from view.

After fixing the door to the bracket 5, the assembly can be completed.

To this end, the two discs 11 and 12 are arranged in the respective seats 9 and 10 present in the arm 4, the pins 13 and 14 being inserted respectively in the slots 15 and 16.

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 The fixing screws are then threaded by passing them through the slots 7, to screw them respectively into the threaded holes of the plates 8 without tightening them completely, so as to allow the movements of the various parts necessary for alignment.

For the vertical adjustment of the door, a key is inserted into the hole in the disc 11 and the latter is rotated about its own axis in one direction or the other, depending on whether the door is to be raised or lowered.

During this rotation, the spindle 13 can slide freely inside the slot 15 in the horizontal direction, while the vertical component of its displacement causes a displacement of the same magnitude of the stirrup 5.

Once you have reached the desired position, simply tighten the screws to lock the parts in position.

The procedure is the same for alignment in the horizontal direction, by acting on the disc 12.

For this, one always acts by means of a key on the disc 12 so as to make the spindle 14 complete a path in an arc of a circle.

The spindle can slide freely in the vertical direction in the slot 15, while the component of the displacement in the horizontal direction has the effect of a corresponding displacement of the stirrup 5.

Furthermore, when, at the opening of the door, the hinge approaches the maximum opening position, the arm 4, being inserted between the fins 30, comes into engagement with the inclined edges of the springs 31, which act as a brake whose action increases as we approach the maximum opening limit

Claims (10)

Claims 1. Invisible adjustable hinge for doors, gates, closings or the like, characterized in that it is constituted by a part mounted inside an enveloping frame integral with the structure of the construction, and an applied stirrup on the edge of the closure, which constitutes the second part of the hinge and which, during rotation, enters and leaves said enveloping frame by passing through an opening provided in correspondence with the side of the frame facing the edge of the closure. 2. invisible adjustable hinge according to claim 1, of the type comprising a part (2) to be fixed to the frame of the closure, an arm (4) articulated to said part (2) and a stirrup (5) to be fixed to the arm, characterized in that said stirrup (5) is mounted on said arm (4), and that means are provided suitable for adjusting the mutual positioning of said parts (4,5) and for locking them in the desired position. 3. invisible hinge according to claim 2, characterized in that there are provided eccentric means (11,12, 13,14, 15,16), suitable for moving said stirrup relative to said arm, in two orthogonal directions between they, screw means being provided, suitable for blocking said elements in the position reached. 4. invisible hinge according to claim 3, characterized in that said eccentric means consist of discs (11,12) mounted between respective seats (9,10) in one of said parts, said discs having as many pins eccentrics (13,14) projecting from one side, which fit into a pair of slots (15,16) formed in the other of said parts, so that, when the disc rotates around its own axis, the corresponding part is caused to slide in the direction orthogonal to that of the slot, said slots being elongated and arranged in directions orthogonal to each other. <Desc / Clms Page number 9> 5. invisible hinge according to claim 3, characterized in that said discs (11,12) are inserted between holes formed in said arm (4) or in said bracket (5). 6. invisible hinge according to claim 4, characterized in that said discs have polygonal holes for the insertion of keys to control the rotation of said discs and therefore the adjustment of the hinge. 7. invisible hinge according to one of the preceding claims, characterized in that means are provided suitable for cooperating with the movable part of the hinge to slow down its movement, when the latter approaches the open position. Max. 8. invisible hinge according to claim 7, characterized in that said means consist of a pair of springs positioned along the path of said movable part of the hinge, adapted to cooperate with said movable part when the latter reaches near the maximum opening limit. 9. invisible hinge according to claim 8, characterized in that said springs cooperate with said movable part of the hinge by an inclined surface, so that the resistance opposed by said springs in advance of said movable part of the hinge increases as said movable part approaches the maximum opening limit. 10. Invisible hinge according to claim 9, characterized in that each spring (30) has a step (32) which signals by a click the opening limit of the door.