FR3077085A1 - INVISIBLE HINGE FOR RECOVERY DOOR - Google Patents

Abstract

The invention relates to the field of so-called invisible hinges, and a particular method of installing invisible hinge (30) for overlay door (100), the method comprising at least the insertion of a first portion (311) of an invisible hinge leaf (31), in the direction of the width (X) of the leaf (20), in a recess (24) of a leaf (20) of the covering door (100), and moving the first part (311) of the invisible hinge leaf (31) inside the recess (24) of the leaf (20) in the direction of the leaf thickness (Y) (20), in the opening direction of the leaf (20). The recess (24) of the leaf (20) opens only on a rabbet (211) of a song (21) of the leaf (20) and widens, beyond the opening (241), in the direction leaf opening (20). Said first portion (311) of the wing (31) comprising a fixed pivot (313) and a slide (314) for a sliding pivot (315).

Description

Invention background

The present disclosure relates to the field of invisible hinges, that is to say arranged so as to be hidden in the closed position, and more specifically invisible hinges for overlapping doors, that is to say for doors whose leaf has at least one rebate edge, so that in the closed position the leaf covers the frame, in the direction of opening of the door, on at least part of its periphery. Thus, the overlap doors allow to hide, on one side of the door, the joint between the leaf and the frame, thereby ensuring a more aesthetic effect, greater security against burglary, and better thermal insulation and phonic.

An invisible hinge for an overlay door has been disclosed, for example, in European Patent Application Publication EP 2,130,997 A2. However, this hinge is not entirely invisible when the door is closed, since the hinge leaf remains partially visible on the exposed part of the leaf edge. Indeed, the insertion of this hinge leaf, which can be quite bulky because of the complex geometry of the hinge, in the recess used to house it in the door leaf, requires extending the opening of this recess on the edge beyond its rebate and up to the exposed portion of the edge. Although it is a priori conceivable to cover the exposed part of the edge with a cover, so as to hide the visible part of the hinge leaf, this solution has several disadvantages, since it makes the installation and dismantling of the device more complicated. the hinge, and can cause the cover to interfere with the frame when the door is opened.

Other invisible hinges for overlapping doors may remain completely invisible when the door is closed, but only allow limited door travel.

Subject and summary of the invention

The present disclosure aims to remedy these drawbacks, by proposing an invisible hinge installation method for an overlapping door allowing the installation of the leaf of an invisible hinge with large clearance in a recess whose opening towards the outside does not not extend beyond the edge of the edge of the door leaf, thus ensuring that the entire hinge can be invisible with the door closed.

According to a first aspect, this object can be achieved thanks to the fact that this method comprises at least a first step of inserting a first part of an invisible hinge leaf, in the direction of the width of the leaf, in a recess of an overlapping door leaf, and a second step of moving the first part of the invisible hinge leaf, inside the leaf recess, in the direction of the thickness of the leaf, in the direction d leaf opening. The recess of the leaf opens only on a rebate of a song of the leaf and widens, beyond the opening, in the direction of opening of the leaf, thereby allowing the movement of the second stage. Said first part of the leaf comprises a fixed pivot and a slide for a sliding pivot, to allow a large clearance of the invisible hinge.

Thanks to these arrangements, and in particular thanks to the fact that the recess opens only on the edge of the edge, but widens, beyond this opening, in the direction of opening of the leaf, it is possible to 'accommodate, in this recess, the leaf of an invisible hinge with complex kinematics that can allow a large movement of the leaf, despite the overlap and without the hinge being visible with the door closed.

In order to firmly support the leaf in the recess, the method may include an additional step of inserting a second part of the invisible hinge leaf in the recess opening only on the edge of the edge, in the direction of the width of the leaf, until the first and second parts of the invisible hinge leaf meet inside the recess in such a way that the second part extends, relative to the first part, in the direction of the '' thickness of the leaf in the opposite direction to the opening direction of the leaf.

By dividing the leaf into two parts, it is possible to install the leaf in a recess with a narrower opening to the outside. It will therefore suffice that the opening is wide enough to allow the passage of each of two parts of the hinge leaf separately, rather than the whole of the hinge leaf.

In order to complete the installation of the leaf in the frame, the method of installing the invisible hinge may further include a step of inserting a hinge of the invisible hinge into a recess in a frame of the overlapping door. , the mass grave also comprising a fixed pivot and a slide for a sliding pivot, and being connected to the leaf by a first bent arm extending from a first end, connected by a sliding pivot to the slide of the mass grave, at a second end , connected to the fixed pivot of the leaf, and by a second bent arm extending from a first end, connected to the fixed pivot of the mass grave, at a second end, connected by a sliding pivot to the slide of the leaf, the first and second bent arms being connected to each other by an intermediate pivot located between their first and second respective ends, and the recess of the frame being opposite the recess received the invisible hinge leaf, when the overlapping door is closed, so as to hide the invisible hinge.

A second aspect of the present disclosure relates to an overlapping door leaf, comprising at least one rebate edge with a recess which can be opened only on the edge rebate and widening, beyond the opening, in the direction leaf opening, and an invisible hinge leaf comprising at least a first part with a fixed pivot and a slide for a sliding pivot. Said first part of said invisible hinge leaf is received in the offset offset, relative to the opening of the recess on the edge of the edge, in the direction of opening of the leaf in the direction of the thickness of the leaf . Thus, when the door is closed, the invisible hinge leaf can remain hidden in the rebate of the edge of the leaf, without emerging on the visible part of the edge, despite a complex kinematics to allow a large movement of the leaf.

In order to firmly support the leaf in the recess, the invisible hinge leaf may further comprise a second part extending, in said recess, relative to the first part, in the direction of closing of the leaf in the direction of the the thickness of the leaf, and the opening of the recess on the edge of the edge may be, in the direction of the thickness of the leaf, less wide than the invisible hinge leaf but wider than each of the first and second parts of the hinge leaf invisible separately. The first and second parts can thus be successively inserted into the recess through the opening, according to the above-mentioned method.

In order to allow better support for the two parts in the recess, by limiting their relative play in at least one direction, this invisible hinge leaf may further comprise a form connection between its first and second parts. This shape connection can in particular be a dovetail connection oriented in the second direction, so as to make the two parts integral in a plane perpendicular to this second direction.

To facilitate the fixing of the invisible hinge leaf in the recess of the edge of the overlapping door leaf, the second part may comprise means for fixing the invisible hinge leaf, which may in particular include holes for screws. Thus, the invisible hinge leaf can be fixed in the recess after the successive insertion of the first and second parts of the invisible hinge leaf. However, it is alternatively conceivable to incorporate the fixing means in the first part of the invisible hinge leaf. In this case, the second part of the invisible hinge leaf could take the form of a simple wedge to laterally support the first part of the invisible hinge leaf, or one could even consider doing without it.

A third aspect of the present disclosure relates to an overlapping door, which may include the aforementioned leaf, a frame with at least one invisible hinge hinge also comprising a fixed pivot and a slide for a sliding pivot, and a first and second bent arms s 'each extending from a first to a respective second end. The hinge can include, like the invisible hinge leaf, a fixed pivot and a slide for a sliding pivot and can be received in a recess of the frame opposite the recess receiving the invisible hinge leaf, when the overlapping door is closed, so as to hide the invisible hinge. The first end of the first bent arm can be connected by a sliding pivot to the slide of the mass grave, and its second end can be connected to the fixed pivot of the invisible hinge leaf. The first end of the second arm can be connected to the fixed pivot of the hinge and its second end can be connected by a sliding pivot to the slide of the hinge leaf. The first and second bent arms can be connected to each other by an intermediate pivot located between their first and second respective ends. Thanks to the complex kinematics of its bent arms, this invisible hinge can therefore be installed in an overlapping door so as to allow a large clearance of the leaf while fully hiding the hinge when the door is closed.

In particular, to ensure this kinematics, the first bent arm can be bent, from its first end, in a direction of opening of the invisible hinge, to at least one first bend located on its first end, a second bend located between its first and second ends and a third bend located on its second end, and the second bent arm be bent, from its first end, in the opening direction of the invisible hinge, to at least one first bend located on its first end and a second elbow.

A fourth aspect of the present invention relates to an invisible hinge leaf for the above-mentioned overlapping door leaf. This leaf may comprise at least a first part comprising a fixed pivot and a slide for a sliding pivot, and a second part extending in a first direction relative to the first part, able to be separated from the first part, and to be joined to the first part in a second direction crossing the first direction.

A fifth aspect of the present invention relates to an invisible hinge for an overlay door, which may include the aforementioned leaf, a hinge, and a first and second bent arms each extending from a first to a respective second end. The hinge can include, like the invisible hinge leaf, a fixed pivot and a slide for a sliding pivot. The first end of the first bent arm can be connected by a sliding pivot to the slide of the mass grave, and its second end can be connected to the fixed pivot of the invisible hinge leaf. The first end of the second arm can be connected to the fixed pivot of the hinge and its second end can be connected by a sliding pivot to the slide of the hinge leaf. The first and second bent arms can be connected to each other by an intermediate pivot located between their first and second respective ends.

Brief description of the drawings

The invention will be well understood and its advantages will appear better on reading the detailed description which follows, of embodiments shown by way of nonlimiting examples. The description refers to the accompanying drawings in which:

FIG. IA is a perspective view of an overlapping door in the open position,

FIG. 1B is a perspective view of the overlapping door of FIG. 1A in the closed position,

FIG. 2A is a perspective view of an invisible hinge of the overlapping door of FIG. IA in the open position,

FIG. 2B is a perspective view of the same invisible hinge in the closed position,

FIG. 3A is a sectional view, in the plane IIIA-IIIA, of the invisible hinge of FIG. 2A in the open position,

FIG. 3B is a sectional view, in the plane IIIB-IIIB, of the same invisible hinge in the closed position,

FIGS. 4A to 4F illustrate steps for installing the same invisible hinge in the overlapping door,

FIG. 5 is a perspective view of an invisible hinge according to a first alternative embodiment, and

- Figure 6 is a perspective view of an invisible hinge according to a second alternative embodiment.

Detailed description of the invention

A door 100 is illustrated in Figures IA and IB in open and closed positions, respectively. This door 100 may include a frame 10, a leaf 20 and invisible hinges 30 connecting a edge 21 of the leaf 20 to allow a large angular movement a [ALPHA] of the leaf 20 relative to the frame 10. This angular movement a [ALPHA] can be, for example, up to 180 °. Although, in the illustrated embodiment, the door 100 has two invisible hinges 30 for connecting the edge 21 to the frame 10, the number of invisible hinges 30 may vary according to the dimensions of the door 100. Thus, it would be possible to have three invisible hinges 30, or even more, to connect the edge 21 to the frame 10, or even to have only one invisible hinge 30.

The door 100 can be, as in the illustrated embodiment, an overlapping door. Thus, at least the edge 21 on which the invisible hinges 30 are installed may have a rebate 211, forming a first surface 212 and a second surface 213 meeting, for example, at right angles, the first surface 212 possibly extending in the direction Y of the thickness of the leaf 20, and the second surface 213 which can extend in the direction X of the width of the leaf 20, so as to cover the door seal between the edge 21 and the frame in the direction d opening of the door 100 when it is closed, as illustrated in FIG. 1B. Other edges of the leaf 20 may have similar rebates. Thus, for example, as also illustrated in FIGS. 1A and 1B, the upper edge 22 and the lateral edge 23 on the side opposite to the edge 21 in the direction of the width of the leaf 20 may have similar rebates, in order to cover all the door seal between the leaf 20 and the frame 10 in the opening direction of the door 100 when it is closed, as illustrated in FIG. 1B.

As illustrated in greater detail in FIGS. 2A and 2B, each invisible hinge 30 may comprise a leaf 31, a hinge 32, and two bent arms 33, 34 connecting the leaf 31 to the hinge 32. The leaf 31 may be intended to be received in a recess 24 in the edge 21 and comprising a first part 311 and a second part 312.

The first part 311 of the leaf 31 may comprise a fixed pivot

313 and a pair of slides 314 capable of receiving the opposite ends of the axis of a sliding pivot 315. The fixed pivot 313 and the sliding pivot

314 can have pivot axes parallel to each other and orthogonal to the directions X, Y of the width and thickness of the leaf 20. As illustrated in FIGS. 2A to 3B, the slides 314 can be perpendicular to the axis of the pivot sliding 315 and be inclined at an angle β [BETA] of, for example, between 0 and 30 °, in the opening direction of the door 100, relative to the direction X.

The second part 312 may extend, with respect to the first part 311, in the direction opposite to the direction of opening of the door 10 in the direction Y of the thickness of the leaf 20, be able to be separated from the first part 311, but also to be joined to the first part 311 by displacement in the direction X of the width of the leaf 20. For this, the leaf 31 may include a shaped connection, such as for example the visible dovetail connection 316 in FIG. 2A, oriented in the direction X of the width of the leaf 20, and capable of connecting said first and second parts 311, 312. However, it is also possible to omit such a form connection, as in the mode of alternative embodiment illustrated in FIG. 5, in which the remaining elements are equivalent to those of the invisible hinge 30 illustrated in FIGS. 2A to 3B and therefore receive the same references.

The second part 312 can also comprise means for fixing the leaf 31 to the leaf 20, such as for example the ears 317 of the embodiment illustrated in FIGS. 2A to 3B, having holes 318 for receiving fixing screws 319. However , it is also possible to locate the means for fixing the leaf 31 of the hinge 30 to the leaf 20 on the first part 311 of the leaf 31, as in the alternative embodiment illustrated in FIG. 6, in which the ears 317 with holes 318 to receive fixing screws 319 are located on the first part of the leaf 31. In this case, the second part 312 of the leaf 31 can be reduced to simple wedges 312a, 312b to stabilize it in the recess 24 without interfering with the kinematics of the arms 33, 34, as illustrated, or even be eliminated entirely. The other elements are equivalent to those of the invisible hinges 30 illustrated in FIGS. 2A to 3B and 5, and therefore receive the same references.

Returning to FIGS. 2A to 3B, the recess 24 can be accessed by an opening 241 opening only on the rebate 211, so as to be hidden when the door is closed. In the direction Y of the thickness of the leaf 20, this opening 241 may in particular have a width Lo less than the total width L _T of the leaf 31 of the invisible hinge 30, but greater than each of the widths Li, L ₂ of, respectively , the first and second parts 311, 312 of the leaf 31 in the same direction Y, as illustrated in FIG. 3A. Beyond the opening 241, towards the inside of the leaf 20, the recess 24 can widen to a width L _E at least equal to the total width L _T of the leaf 31. Thus, the shape of the recess 24 may allow the successive insertion of the first and second parts 311, 312 of the leaf 31 in the direction X through the opening 241 to accommodate the whole of the leaf 31 in this recess 24, while maintaining a distance D , in direction X, between the recess 24 and the part 215 of the edge 21, beyond the rebate 211, remaining visible when the door 100 is closed.

The mass grave 32 may also include, as illustrated, a fixed pivot

321 and a pair of slides 322 able to receive the opposite ends of the axis of a sliding pivot 323. The fixed pivot 321 and the sliding pivot 323 can also have pivot axes parallel to each other and orthogonal to the directions X, Y As illustrated in FIGS. 3A and 3B, the slides 322 can be perpendicular to the axis of the sliding pivot 323 and be inclined by an angle γ [GAMMA] of, for example, between 0 and 30 °, in the direction of closing of the door 100, with respect to the direction X, with the door 100 closed. In addition, the mass grave 32 may be intended to be received in a recess 11 in the frame 10, opposite the recess 24 when the door 10 is closed and include means for fixing to the frame 10, such as for example the ears 324 of the illustrated embodiment, having holes 325 for receiving fixing screws 326.

The first bent arm 33 may have, as illustrated, two parallel branches 33a, 33b, each extending from a first end 331 to a second end 332 of the bent arm 33, with a gap between them in the direction of the pivot axes . The first end 331 can be connected by the sliding pivot 323 to the slides

322 of the mass grave 32, while the second end 332 can be connected to the fixed pivot 313 of the leaf 31. From its first end 331, the first bent arm 33 can have at least a first elbow 333, a second elbow 334, and a third bend 335 in the direction of opening of the invisible hinge 30. The first bend 333 can in particular be located on its first end 331, the second bend 334 between its first and second ends 331, 332 and the third bend 335 on its second end 332. The sum of the angles of the elbows 333, 334 and 335 in the direction of opening of the door 100 may be greater than the angular movement a [ALPHA] of the leaf 20 relative to the frame 10.

The second bent arm 34 can be located, as illustrated, between the two parallel branches 33a, 33b of the first bent arm 33 and extend from a first end 341, which can be connected to the fixed pivot 321 of the mass grave 32, to a second end 342, which can be connected by the sliding pivot 315 to the slides 314 of the leaf 31. From its first end 341, the second bent arm 34 can have at least a first elbow 343 and a second elbow 344 in the direction of opening of the invisible hinge 30. The sum of the angles of the elbows 343 and 344 in the direction of opening of the door can also be greater than the angular clearance a [ALPHA] of the leaf 20 relative to the frame 10. The first and second bent arms 33,34 can also be connected to each other by an intermediate pivot 35 located between their first and second ends 331,332,341,342 respectively. More specifically, this intermediate pivot 35 can connect the second bend 334 of the first bent arm 34 to an extension 345 of the first end 341 of the second bent arm 34 beyond its first bend 343.

In operation, when the door 10 opens, the first bent arm 33 can pivot around the sliding pivot 323 in the opening direction of the door 10, while the sliding pivot 323 can slide in its slides 322 towards the exterior of the mass grave 30. Simultaneously, the leaf 31 can also pivot, relative to the first bent arm 33, around the fixed pivot 313, in the opening direction of the door 10. The second bent arm 34 can also pivot, around of the fixed pivot 321, in the opening direction of the door 10, while the leaf 31 can pivot in the same direction around the sliding pivot 315, while the latter can slide in its slides 314 towards the outside of the swing 31. The intermediate pivot 35 can maintain a connection between the two bent arms 33, 34, while allowing relative pivoting between them. When door 10 is closed, these same movements will be reversed.

Each invisible hinge 30 can be installed according to the method illustrated in FIGS. 4A to 4E. In a first step of this process, illustrated in FIG. 4A, the first part 311 of the leaf 31 can be introduced into the recess 24, through the opening 241, in the direction X of the width of the leaf 20. In a second step, illustrated in FIG. 4B, the first part 311 of the leaf 31 can be moved, inside the recess 24, in the direction Y of the thickness of the leaf 20 in the direction of the opening of the door 100, so as to release the opening 241 for a third step of inserting the second part 312 into the recess 24, through this same opening 241, in the direction X, as illustrated in FIG. 4C. During this insertion, the displacement, in the X direction, of this second part 312 relative to the first part 311 can be used to join the two parts 311, 312 through a shape connection, like the dovetail connection 316, when present. After this insertion, in a fourth step, the whole leaf 31 of the invisible hinge 30 can be fixed to the leaf 20 with the fixing means present on the second part 312, for example with the fixing screws 319 passing through the holes 318 ears 317 of the second part 312, as illustrated in FIG. 4D. However, if the fixing means are located on the first part 311 of the leaf 31, as in the embodiment illustrated in FIG. 6, it is also possible to fix this first part 311 to the leaf 20 before the insertion of the second part 312 in the recess 24, where it can simply be pressed against the first part 311.

In two other stages of installation of the invisible hinge 30, which can precede or follow those of the installation of its leaf 31 in the recess 24, the hinge 30 can be introduced into the recess 11 of the frame 10, as illustrated in FIG. 4E, and fixed to the frame 10 with fixing means such as for example the fixing screws 326 passing through the holes 325 of the ears 324 of the mass grave 30, as illustrated in FIG. 4F.

Although the present invention has been described with reference to specific exemplary embodiments, it is obvious that various modifications and changes can be made to these examples without departing from the general scope of the invention as defined by the claims. In addition, individual features of the various embodiments discussed can be combined in additional embodiments. Therefore, the description and the drawings should be considered in an illustrative rather than restrictive sense.

Claims (13)

1. A method of installing an invisible hinge (30) for an overlay door (100), the method comprising at least the following steps: insertion of a first part (311) of a leaf (31) of invisible hinge (30), in the direction of the width (X) of the leaf (20), in a recess (24) of a leaf (20 ) of overlapping door (100), the recess (24) of the leaf (20) opening only on a rebate (211) of a song (21) of the leaf (20) and widening, beyond the opening (241), in the direction of opening of the leaf (20), and said first part (311) of the leaf (31) comprising a fixed pivot (313) and a slide (314) for a sliding pivot (315) , and displacement of the first part (311) of the leaf (31) of invisible hinge (30), inside the recess (24) of the leaf (20), in the direction of the thickness (Y) of the leaf (20), in the opening direction of the leaf (20). 2. A method of installing an invisible hinge (30) according to claim 1, further comprising a step of inserting a second part (312) of the leaf (31) of invisible hinge (30) in the recess (24) opening only on the rebate (211) of the edge (21), in the direction of the width (X) of the leaf (20), until the first and second parts (211, 212) of the leaf (21) invisible hinge (20) meet inside the recess (24) so that the second part (212) extends, relative to the first part (211), in the thickness direction (Y) of the leaf (20) in the opposite direction to the opening direction of the leaf (20). 3. A method of installing an invisible hinge (30) according to any one of claims 1 or 2, further comprising a step of inserting a hinge (32) of the invisible hinge (30) in a recess (11) of a frame (10) of the overlapping door (100), the hinge (32) also comprising a fixed pivot (321) and a slide (322) for a sliding pivot (323), and being connected to the leaf (31) by a first bent arm (33) extending from a first end (331), connected by a sliding pivot (323) to the slide (322) of the mass grave (32), at a second end (332 ), connected to the fixed pivot (313) of the invisible hinge leaf (31) (30), and by a second bent arm (34) extending from a first end (341), connected to the fixed pivot (321) of the hinge (321), at a second end (342), connected by a sliding pivot (315) to the slide (314) of the leaf (31) of invisible hinge (30), the first and second arms bent (33,34) being connected to each other by an intermediate pivot (35) located between their first and second respective ends (331,332; 341,342), and the recess (11) of the frame (10) being opposite the recess (24) receiving the flap (31) of invisible hinge (30), when the overlapping door (100) is closed, so to hide the invisible hinge (30). 4. Door leaf (20) with overlapping door (100), comprising at least: an edge (21) with a rebate (211) with a recess (24) opening only on the rebate (211) of the edge (21) and widening, beyond the opening (241), in the direction of opening of the leaf (20), and a leaf (31) of invisible hinge (30) comprising at least a first part (311) with a fixed pivot (313) and a slide (314) for a sliding pivot (315), said first part (311) of said flap (31) of invisible hinge (30) being received in the recess (24) offset from the opening (241) of the recess (24) on the rebate (211) edge (21), in the opening direction of the leaf (20) in the direction of the thickness (X) of the leaf (20). 5. leaf (20) of overlapping door (100) according to claim 4, wherein the leaf (31) of invisible hinge (30) further comprises a second portion (312) extending in said recess (24) , relative to the first part (311), in the closing direction of the leaf (20) in the direction of the thickness (X) of the leaf (20), the opening (241) of the recess (24) on the rebate (211) of the edge (21) being, in the direction of the thickness (X) of the leaf (20), less wide than the leaf (21) of invisible hinge (30) but wider than each of the first and second parts (311) of the leaf (31) of invisible hinge (30) separately. 6. leaf (20) of overlapping door (100) according to claim 5, wherein the leaf (31) of invisible hinge (30) further comprises a form connection between its first and second parts (311,312). 7. leaf (20) of overlapping door (100) according to claim 6, in which the form connection is a dovetail connection (316) oriented in the thickness direction (X) of the leaf (20). ). 8. leaf (20) of overlapping door (100) according to any one of claims 5 to 7, wherein the second part (312) comprises means for fixing the leaf (31) of invisible hinge (30). 9. leaf (20) of overlapping door (100) according to claim 8, wherein these fixing means comprise holes (318) for screws (319). 10. Overlay door (100) comprising: a leaf (20) according to any one of claims 4 to 9, a frame (10) with at least one hinge (32) of invisible hinge (30) also comprising a fixed pivot (321) and a slide (322) for a sliding pivot (323), a first bent arm (33) extending from a first end (331), connected by a sliding pivot (323) to the slide (322) of the mass grave (32), at a second end (332), connected to the fixed pivot (313) of the invisible hinge leaf (31) (30), and a second bent arm (34) extending from a first end (341), connected to the fixed pivot (321) of the mass grave (321), at a second end (342), connected by a sliding pivot (315) to the slide (314) of the leaf (31) of invisible hinge (30), and in which the first and second bent arms ( 33,34) are connected to each other by an intermediate pivot (35) located between their first and second ends (331,332; 341,342) respectively, and the mass grave (32) is received in a recess (11) of the frame (10) opposite to the recess (24) receiving the flap (31) of invisible hinge (30), when the lap door (100) is closed, so as to hide the invisible hinge (30). 11. Overlay door (100) according to claim 10, wherein the first bent arm (33) is bent, from its first end (331), in a direction of opening of the invisible hinge (30), at least a first elbow (333) situated on its first end (331), a second elbow (334) situated between its first and second ends (331,332) and a third elbow (335) situated on its second end (332), and the second bent arm (34) is bent, from its first end (341), in the direction of opening of the invisible hinge (30), to at least one first bend (343) located on its first end (341 ) and a second elbow (344). 12. Leaf (31) of invisible hinge (30) for a leaf (20) of overlapping door (100) according to any one of claims 4 to 9, the leaf (31) comprising at least: a first part (311) comprising a fixed pivot (313) and a slide (314) for a sliding pivot (315), and a second part (312) extending in a first direction (Y) relative to the first part (311), able to be separated from the first part (311), and to be joined to the first part (311) in a second direction crossing the first direction. 13. Concealed hinge (30) for overlapping door (100), comprising: the invisible hinge leaf (31) according to claim 12, a hinge (32) also comprising a fixed pivot (321) and a slide (322) for a sliding pivot (323), a first bent arm (33) extending from a first end (331), connected by a sliding pivot (323) to the slide (322) of the mass grave (32), to a second end (332), connected to the fixed pivot (313) of the wing ( 31) invisible hinge (30), 5 a second bent arm (34) extending from a first end (341), connected to the fixed pivot (321) of the mass grave (321), to a second end (342), connected by a sliding pivot (315) to the slide (314) of the flap (31) of invisible hinge (30), and in which the first and second bent arms (33,34) are connected one 10 to the other by an intermediate pivot (35) located between their first and second ends (331,332; 341,342) respectively.