EP0028544B1 - Hinge lockable at will - Google Patents

Description

The invention relates to a hinge provided with a device for selective locking of the relative orientation of the two bodies which constitute it.

Hinges are already known comprising devices for maintaining a determined relative orientation of the bodies constituting them.

• - est écarté radialement de l'axe de pivotement,
• - est attelé au premier corps,
• - en est en permanence solidaire en rotation,
• - est monté coulissant sur ce premier corps dans une direction parallèle à l'axe de pivotement,
• - a une extrémité libre qui est disposée en regard d'une face délimitant le deuxième corps, et
• - est muni d'un organe de commande d'un coulissement l'écartant de ladite face,
  cependant que:
• - au moins un logement est ménagé dans le deuxième corps, que chaque logement débouche dans ladite face du deuxième corps et est susceptible de recevoir au moins partiellement le doigt de blocage en une position relative déterminée des premier et deuxième corps, dite position de blocage,
• - un organe élastique de rappel et attelé entre le doigt de blocage et l'un des permier et deuxième corps et a pour effet de pousser l'extrémité libre du doigt de blocage vers ladite face du deuxième corps susceptible de provoquer l'introduction automatique de ce doigt de blocage dans chaque logement, dans la position de blocage correspondante des premier et deuxième corps, et
• - l'écartement maximal commandé par l'organe de commande du coulissement du doigt de blocage et au moins égal à la profondeur d'introduction du doigt de blocage dans chaque logement de manière à permettre, à partir d'une position de blocage, le déblocage de position des permier et deuxième corps.

Thus the patent application FR-A No 2392268 represents a hinge constituted by a first and by a second body mounted pivoting with respect to each other, and by a locking finger of the relative position of said first and second body which

• - is radially spaced from the pivot axis,
• - is harnessed to the first body,
• - is permanently attached to it in rotation,
• - is slidably mounted on this first body in a direction parallel to the pivot axis,
• - has a free end which is arranged opposite a face delimiting the second body, and
• - is provided with a sliding control member separating it from said face,
  while:
• at least one housing is provided in the second body, each housing opens into said face of the second body and is capable of at least partially receiving the locking finger in a determined relative position of the first and second body, called the locking position,
• - an elastic return member and coupled between the blocking finger and one of the first and second bodies and has the effect of pushing the free end of the blocking finger towards said face of the second body capable of causing the automatic introduction of this locking finger in each housing, in the corresponding locking position of the first and second bodies, and
• the maximum spacing controlled by the control member for the sliding of the locking finger and at least equal to the depth of introduction of the locking finger into each housing so as to allow, from a locking position, the position unlocking of the first and second bodies.

This known hinge is applied in the production of a folding ladder and satisfactorily performs its function, which is to allow the user to choose the orientation of the two mutually articulated parts of a ladder, and the automation of the maintaining this orientation in several predetermined relative directions.

It can be noted that, concerning the application to an articulated ladder, the anterior hinge is certainly sufficient, while for other applications, such as in particular those relating to the mounting of hinged doors, and pivoting window shutters, it would not be suitable, not only because of the control of its release by traction and not by pushing on the control member, but also because of the dissymmetry of its constitution which would make it necessary to produce two distinct types of hinges in order to obtain right hinges and left hinges.

Another type of hinge is also known, in particular shown in patent application FR-A No 2399529. Such a hinge does not allow a simple automatic blocking to be obtained because, unlike the hinge mentioned first, it requires , to pass from one blocking configuration to another, to release the blocking finger from the housings of the two bodies mounted with relative pivoting. It is certainly possible to find visually and by manual command of the user a new blocking configuration, but the advantageous automation of the first hinge has not been preserved, which can already be a hindrance for the use of the 'folding ladder which is applied to the hinge of the application FR-a _No. 2,399,529 but would be a crippling disadvantage for other applications, eg for swing doors.

It may finally be noted that there is a certain symmetry in mounting the hinge locking device of the aforementioned second patent application which could possibly make it possible, with the same device, to produce a right hinge or a left hinge, at the choice.

The invention intends to remedy the drawbacks of known hinges by supplementing the hinge of application FR-A No 2392268 to allow easy control of the release by pushing, and by designing it to allow, without additional machining, possibly at the same time as the use, the choice of mounting this hinge as a right hinge or a left hinge.

According to the invention, the locking finger is made axially integral with a pivot shaft linked in rotation with the first body and on which the second body is articulated so that a thrust exerted, by means of the control member, on said pivot shaft causes the release finger of the housing provided by the second body to be released, thus ensuring the release of the hinge and allowing the pivoting of the two bodies relative to each other before reach another blocked position.

• - le doigt de blocage est supporté par une pièce qui est distincte de l'arbre de pivotement et qui en est rendue solidaire;
• - l'arbre de pivotement comporte une extrémité filetée sur laquelle est vissée ladite pièce support du doigt de blocage, le vissage correspondant constituant le moyen de solidarisation de ladite pièce avec l'arbre de pivotement;
• - un contre-écrou coopère avec ladite extrémité de l'arbre de pivotement et avec ladite pièce support du doigt de blocage, pour bloquer cette pièce support en une position réglable par rapport à l'arbre de pivotement;
• - l'extrémité de l'arbre de pivotement opposée à ladite extrémité filetée est conformée en un poussoir qui constitue l'organe de commande du coulissement du doigt de blocage;
• - d'une part, le poussoir est disposé en regard d'une cavité, ménagée dans le premier corps, qui débouche dans une face, dite de commande de la poussée, de ce premier corps et à l'intérieur de laquelle ledit poussoir est susceptible de pénétrer, sous l'effet d'une poussée, jusqu'à au moins affleurer ladite face de commande de la poussée et, d'autre part, ladite pièce distincte de l'arbre de pivotement est, en l'absence de poussée sur le poussoir, en appui sous l'effet de l'organe élastique de rappel sur une face, dite de butée, du premier corps, le poussoir étant alors disposé en saillie par rapport à la face de commande de la poussée en en étant écarté d'une distance réglable au moyen dudit vissage;
• - le doigt de blocage est monté coulissant dans un logement qui est ménagé dans le premier corps et qui est conformé pour maintenir une orientation radiale déterminée dudit doigt de blocage par rapport audit premier corps;
• - le premier corps comprend au moins deux branches qui s'étendent perpendiculairement à l'axe de l'arbre de pivotement et entre lesquelles est disposée au moins une partie du deuxième corps, cependant que le doigt de blocage est constitué par un ergot cylindrique qui s'étend parallèlement à l'axe de l'arbre de pivotement, tout en étant distinct de ce dernier, et est monté coulissant dans un logement qui est ménagé dans le premier corps et est conformé pour maintenir une orientation radiale déterminée dudit doigt de blocage par rapport audit premier corps, les deux branches du premier corps étant munies d'au moins une paire de trous traversants alignés, l'un quelconque desdits trous constituant ledit logement de coulissement du doigt de blocage dans le premier corps, et
• - le premier corps est symétrique par rapport au plan perpendiculaire à l'axe de l'arbre de pivotement et équidistant des faces internes des deux branches de ce premier corps.

In addition, the following advantageous arrangements are preferably adopted:

• - The locking finger is supported by a part which is separate from the pivot shaft and which is made integral therewith;
• - The pivot shaft has a threaded end on which is screwed said support piece of the locking finger, the corresponding screw constituting the means of securing said piece with the pivot shaft;
• - a lock nut cooperates with said end of the pivot shaft and with said support piece of the locking finger, to block this support part in an adjustable position relative to the pivot shaft;
• - The end of the pivot shaft opposite to said threaded end is shaped as a pusher which constitutes the member for controlling the sliding of the locking finger;
• - On the one hand, the pusher is disposed opposite a cavity, formed in the first body, which opens into a face, called the thrust control face, of this first body and inside which said pusher is capable of penetrating, under the effect of a thrust, until at least flush with said thrust control face and, on the other hand, said separate part of the pivot shaft is, in the absence of thrust on the pusher, bearing under the effect of the elastic return member on a face, called a stop, of the first body, the pusher then being arranged projecting relative to the thrust control face while being spaced therefrom an adjustable distance by means of said screwing;
• - The locking finger is slidably mounted in a housing which is formed in the first body and which is shaped to maintain a determined radial orientation of said locking finger relative to said first body;
• - The first body comprises at least two branches which extend perpendicular to the axis of the pivot shaft and between which is arranged at least part of the second body, while the locking finger is constituted by a cylindrical lug which extends parallel to the axis of the pivot shaft, while being distinct from the latter, and is slidably mounted in a housing which is formed in the first body and is shaped to maintain a determined radial orientation of said locking finger relative to said first body, the two branches of the first body being provided with at least one pair of aligned through holes, any one of said holes constituting said housing for sliding the locking finger in the first body, and
• - The first body is symmetrical with respect to the plane perpendicular to the axis of the pivot shaft and equidistant from the internal faces of the two branches of this first body.

• - elle permet déjà l'obtention de l'automatisme de blocage de la charnière de la demande FR-A No 2 392 268;
• - elle possède en outre une commande de déblocage par poussée qui lui confère une simplicité d'utilisation indispensable dans certaines applications, telles que le montage de portes ou de volets battants;
• - sans aucun usinage supplémentaire, il est possible de la transformer très simplement en charnière de gauche, si elle était initialement de droite, et inversement, ce qui la rend interchangeable à un prix de revient modique;
• - elle possède des possibilités de réglage de la position de son doigt de blocage, et
• - elle possède une simplicité générale dans sa constitution qui est gage à la fois d'un faible coût de fabrication et d'une bonne robustesse.

The new hinge has the following advantages:

• - It already makes it possible to obtain the automatic locking mechanism for the hinge of the request FR-A No 2 392 268;
• - It also has a push release control which gives it a simplicity of use essential in certain applications, such as the mounting of doors or swing shutters;
• - without any additional machining, it is possible to transform it very simply into a hinge on the left, if it was initially on the right, and vice versa, which makes it interchangeable at a low cost price;
• - it has possibilities for adjusting the position of its locking finger, and
• - It has a general simplicity in its constitution which is a guarantee of both low manufacturing cost and good robustness.

The invention will be better understood and secondary characteristics and their advantages will become apparent during the description of an embodiment given below by way of example.

• la fig. 1 est une coupe axiale d'une charnière conforme à l'invention, selon un premier montage et dans une première configuration de fonctionnement;
• la fig. 2 est une coupe analogue à celle de la fig. 1 de la même charnière, mais dans une deuxième configuration de fonctionnement;
• la fig. 3 est une coupe suivant III-III de la fig. 1 ;
• la fig. 4 est une coupe suivant IV-IV de la fig. 1, et
• la fig. 5 est une coupe axiale d'une charnière conforme à l'invention, comprenant les éléments de la charnière de la fig. 1, mais assemblés selon un deuxième montage, distinct du premier.

Reference will be made to the accompanying drawings, in which:

• fig. 1 is an axial section of a hinge according to the invention, according to a first assembly and in a first operating configuration;
• fig. 2 is a section similar to that of FIG. 1 of the same hinge, but in a second operating configuration;
• fig. 3 is a section along III-III of FIG. 1;
• fig. 4 is a section on IV-IV of FIG. 1, and
• fig. 5 is an axial section of a hinge according to the invention, comprising the elements of the hinge of FIG. 1, but assembled according to a second assembly, distinct from the first.

• - un premier corps 1, lui-même constitué par un étrier 2 à deux branches, adapté à recevoir un élément de panneau - porte vitrée ou autre -, et par deux branches 3 et 4 de réception d'un arbre de pivotement 5,
• - un deuxième corps 6, lui-même constitué par un étrier 7 à deux branches, permettant la fixation de la charnière sur la structure fixe supportant le panneau mobile, et par une pièce 8 de forme générale cylindrique.

The hinge shown includes:

• a first body 1, itself constituted by a stirrup 2 with two branches, adapted to receive a panel element - glass door or the like -, and by two branches 3 and 4 for receiving a pivoting shaft 5,
• - A second body 6, itself constituted by a bracket 7 with two branches, allowing the fixing of the hinge on the fixed structure supporting the movable panel, and by a part 8 of generally cylindrical shape.

The cylindrical part 8 is delimited by two transverse faces 9 and 10, perpendicular to the geometric axis 11 of the pivot shaft 5, and is introduced between the two branches 3 and 4 of the first body 1, the faces 9 and 10 of the part 8 being arranged opposite the faces 12 and 13 of said branches 3 and 4, respectively, practically without play except that necessary for assembly and operation.

The branches 3 and 4 of the first body, and the cylindrical part 8 of the second body, have first bores permanently aligned 14, 15 and 16, respectively, coaxial with the geometric axis, inside which the shaft is housed 5, slidably mounted relative to the first body 1 and to the second body 6, parallel to the geometric axis 11.

On the side opposite their faces 12 and 13, the branches 3 and 4 are provided with cylindrical cavities delimited by a bottom 17 and 18, as well as by a cylindrical face 19 and 20, and which open to the outside of said branches, respectively.

In the configuration of fig. 1, the support 21 of a locking finger 22 is screwed at 23 onto the end of the shaft 5 which is arranged on the left and is provided with a thread 24. A lock nut 25, also screwed at 26 on the thread 24, blocks the support 21 relative to the shaft 5 in any desired position, being provided, to do this, with a screw groove 27. The support 21 and the lock nut 25 have diameters substantially equal between them, and little less than the common diameter of the faces cylindrical 19 and 10, so that they are likely to be contained in the corresponding cylindrical cavities: in the left cavity (cylindrical face 19) in the configuration of FIG. 1, and in the right-hand cavity (cylindrical face 20) in the configuration of FIG. 5.

The locking finger 22 is force fitted into a hole 28 with which the support 21 is provided, and protrudes from the face 29 of this support which is arranged opposite the bottom 7 of the cylindrical cavity. The geometric axis 30 of the finger 22 is distinct from the geometric axis 11 of the shaft 5, and is spaced therefrom by a distance D.

Furthermore, it is noted that the branches 3 and 4 of the first body, and the cylindrical part 8 of the second body, are provided with through holes 31, 32 and 33, respectively, which, in the configuration of FIG. 1, are aligned. In addition, the end of the locking finger 22, which protrudes from the face 29 of the support 21, is introduced both into the orifice 31 of the branch 3, which it crosses, and into the orifice 33 of the part 8. The face 29 of the support 21 is then in abutment on the bottom 17 of the left cavity.

In the configuration of fig. 2, it is noted that the face 29 of the support 21 could have been moved away from the bottom 17 of the cylindrical cavity by a distance E which is greater than the depth P of introduction of the locking finger 22 into the orifice 33 in the configuration previous of fig. 1. The locking finger 22 being integral with the support 21, it has itself been displaced by a distance E relative to its initial position and is, therefore, out of the orifice 33. The distance E being , moreover, the maximum distance of retraction of the locking finger 22, it is further noted that the latter and, in one and the other of the two extreme configurations described, introduced at least partially (FIG. 2) into the 'orifice of the branch 3 and is, therefore, permanently secured in rotation with said branch 3, therefore with the first body 1 of the hinge.

In the cavity of the branch 4 of the first body, delimited by the cylindrical face 20 and the bottom 18, there is slidably mounted a plunger 34 which is force fitted on the end 35 of the pivot shaft 5 opposite the thread 24. The external face 36 of the pusher 34 constitutes the thrust face, while the opposite face 37 forms a stop limiting the insertion of the pusher into the cavity, and is furthermore arranged opposite the bottom 18 of this cavity, being separated from the distance E in the configuration of FIG. 1, and on the contrary being in contact with said bottom 18 in the configuration of FIG. 2. The pusher 34 has an internal cylindrical face 38 of diameter smaller than that of the face 39 connected to the pushing face 36, the faces 38 and 39 being connected by a shoulder 40. A helical spring 41 surrounds the internal cylindrical face 38 of the pusher and is disposed between the bottom 18 of the cavity and the shoulder 40, which it tends to separate from said bottom 18.

The following peculiarities should also be seen.

In the configuration of fig. 1, no thrust being exerted on the thrust face 36 of the plunger 34, the effect of the spring 41 is to press the face 29 of the support 21 of the locking finger on the bottom 17 of the left cavity 19a ( fig. 2). The pusher 34, still partially introduced into the right-hand cavity 18a, however projects from a distance S relative to the face 1a of the body 1 into which the cavity 18a opens. The face 1a is the so-called thrust control face, and the distance S is obviously adjustable by means of the screwing (23 and 24) of the shaft 5 in the support 21.

In the configuration of fig. 2, the thrust which has been exerted on the face 36 of the pusher 34 has caused the complete introduction of the latter into the cavity 18a, until its thrust face 36 is withdrawn by an R value relative to the side 1 a.

It must also be indicated that the plane M perpendicular to the geometric axis 11, equidistant from the faces 9 and 10 of the part 8, and distant from each of them by a length L, constitutes a plane of symmetry of this part 8 and branches 3 and 4 provided with cavities and holes which have been defined. This is why the assembly of fig. 1 in which, on the one hand, the support 21 and the lock nut 25 are contained in the left cavity with a cylindrical face 19 and, on the other hand, the pusher 34 is introduced into the right cavity with a cylindrical face 20 may, for certain applications, be replaced without any additional machining by reverse mounting, shown in fig. 5, in which, on the one hand, the support 21 and the lock nut 25 are contained in the right-hand cavity with cylindrical face 20 and, on the other hand, the pusher 34 is inserted in the left-hand cavity with cylindrical face 19. The second assembly (fig. 5) is rigorously symmetrical with the first (fig. 1) with respect to the aforementioned plane M.

The various possibilities of using the hinge described above will now be explained.

First of all, a selective locking device has been produced in position of the two bodies of a hinge.

• - d'éloigner l'épaulement 40 dudit poussoir du fond 18 de la cavité de droite,
• - de tirer l'arbre de pivotement 5 vers la droite, et
• - de pousser l'extrémité 42 du doigt de blocage 22 vers la face 9 de la pièce 8, dans le cas où les trous 31 et 33 ne seraient pas alignés, et, dans le cas contraire, d'introduire ce doigt 22 dans le trou 33.

When the user does not act in any way on the pusher 34 (fig. 1), the spring 41 acts alone and has the effect:

• - move the shoulder 40 away from said pusher from the bottom 18 of the right-hand cavity,
• - pull the pivot shaft 5 to the right, and
• - push the end 42 of the locking finger 22 towards the face 9 of the part 8, in the case where the holes 31 and 33 are not aligned, and, if not, introduce this finger 22 into the hole 33.

Thus, before the introduction of the locking finger 22 into the orifice 33, the two bodies 1 and 2 pivot freely around the shaft 5 until the hole 33 is disposed opposite the end 42 of the finger 22. In this position, we note the automatic introduction of this locking finger 22 into the hole 33. The branch 3 and the part 8 are immobilized relative to each other by the shaft 5 and the non-coaxial locking finger 22.

Naturally, the part 8 can include several separate holes 33, to which correspond as many distinct locking positions of the two bodies 1 and 6 of the hinge.

Can also be arranged between these two bodies a device of balls resiliently biased towards imprints, or a known analogous device, constituting a device for holding the two bodies in one or more preferred positions, but not locked, and capable of being abandoned by simple push to control the relative pivoting of the two bodies.

When, from the locking configuration in position of the two bodies of the hinge shown in FIG. 1, the user wishes to allow the relative pivoting of the two bodies of this hinge again, it suffices for him to press on the thrust face 36 of the plunger 34 to, counteracting the effect of the spring 41, cause this plunger 34 to slide, the shaft 5, the support 21 and the locking finger 22 which are integral with it to the left, and obtain the configuration of FIG. 2 in which, the locking finger 22 having come out of the hole 33, the pivoting has become free again.

We have noted the great simplicity of the constitution of the described arrangements, their effectiveness, as well as their adjustment possibilities. Indeed, on this last point, the assembly of the support 22 to the pivot shaft 5 by screwing (23 and 24) makes it possible to choose the value of the distance E and, consequently, even obtain the blocking , taking into account the value of the maximum depth P of insertion of the locking finger 22 into the hole 33.

The value of the distance E having been chosen, the positioning of the lock nut 25 guarantees invariability. The groove 27 facilitates assembly.

The interchangeability of the assemblies of fig. 1 and 5 has already been mentioned. This characteristic is important because, in the configuration of FIG. 3, if the second body 6 is fixed to the fixed structure (wall or other), the movable panel fixed to the first body 1 can only pivot inside a dihedral of about 180 °. In certain uses, a 360 ° complementary dihedral travel is desired. It is possible to very easily obtain the corresponding mounting with the proposed hinge by adopting its mounting shown in FIG. 5, which requires no additional machining, no additional parts. The symmetry of the branches 3 and 4 and of the part 8 with respect to the plane M allows the use of a single element for two distinct applications which, in the past, required the choice of two entirely separate hinges.

Claims (9)

1. Hinge constituted by a first (1) and by a second (6) body mounted for pivoting one with respect to the other, and by a locking pin (22) for locking the relative position of said first and second bodies, which hinge:

- is radially set off from the pivoting axis (11),

- is coupled (31 ) to the first body (1),

- is permanently fast in rotation therewith,

- is mounted for sliding on said first body in a direction parallel to the pivoting axis (11),

- has a free end (42) which is placed opposite a face (9) defining the second body, and

- is provided with a member (34) controlling a sliding movement to move it apart from the said face,

whereas at least one housing (33) is provided in the second body (6), that each housing (33) issues into the said face (9) of the second body (6) and is adapted to receive at least part of the locking pin (22) in a predetermined relative position of the first and second bodies (1 and 6), called locking position, that an elastic return member (41 ) is coupled between the locking pin (22) and one of the first (1) and second (6) bodies, and that a pressure applied on the free end (42) of the locking pin (22) towards the said face (9) of the second body (6) can cause the automatic introduction of said locking pin (22) in each housing (33), in the corresponding position locking the first and second bodies (1 and 6), and that the maximum spacing (E) controlled by the member (34) controlling the sliding movement of the locking pin (22) is at least equal to the depth (P) to which the locking pin (22) is sunk into each housing (33), thus allowing from a locking position the unlocking of the position of the first and second bodies (1 and 6),
characterized in that the locking finger (22) is axially made fast (21 to 28) with a pivoting shaft (5) already fast in rotation with the first body (1 ) and on which the second body (6) is pivotally mounted so that a thrust exerted via the control member (34) on said pivoting shaft (5) causes the release of the locking finger (22) from the housing (33) provided in the second body (6), thus ensuring the unlocking of the hinge and permitting the pivoting movement of the two bodies (1 and 6) one with respect to the other before reaching another locked position.

2. Hinge according to claim 1, characterized in that the locking pin (22) is supported by a member (21 ) which is separate from the pivoting shaft (5) and which is made fast therewith (23 and 24).

3. Hinge according to claim 2, characterized in that the pivoting shaft (5) has a threaded end (24) on which is screwed the said member (21) supporting the locking pin, the corresponding screwing operation (23 and 24) constituting the means to secure the said member with the pivoting shaft.

4. Hinge according to claim 3, characterized in that a lock-nut (25) co-operates with the said end (24) of the pivoting shaft and with the said member (21) supporting the locking pin, to lock said supporting member (21) in an adjustable position with respect to the pivoting shaft (5).

5. Hinge according to one of claims 3 or 4, characterized in that the end (35) of the pivoting shaft (5) opposite the said threaded end (24) is shaped as a push-member (34) which constitutes the member controlling the locking pin.

6. Hinge according to claim 5, characterized in that, on the one hand, the push-member (34) is situated opposite a cavity (20) which is provided in the first body (1) and issues into a face (1 a), called thrust-controlling face, of said first body (1 ) inside which the said push-member (34) is adapted to penetrate under the effect of a pressure until it is at least flush (R) with the said pressure- control face and, on the other hand, the said member (21) which is separate from the pivoting shaft is, without the push-member being pressed, resting under the effect of the return elastic member (41) on one face (17), called abutting face, of the first body (1), the push-member (34) being then projecting with respect to the pressure- control face (1 a) whilst being at a distance (S) therefrom, said distance being adjustable by means of the said screwing (23 and 24).

7. Hinge according to one of claims 1 to 6, characterized in that the locking pin (22) is mounted for sliding in a housing (31) which is provided in the first body (1) and which is designed so as to keep the said locking pin in radial direction with respect to the said first body (1).

8. Hinge according to one of claims 1 to 7, characterized in that the first body (1 ) comprises at least two branches (3 and 4) which extend perpendicularly to the axis (11) of the pivoting shaft (5) and between which is placed at least part (8) of the second body (6), whereas the locking finger (22) is constituted by a cylindrical lug which extends in parallel to the axis (11) of the pivoting shaft (5) whilst remaining apart (D) therefrom, and is mounted for sliding in a recess (31) which is provided in the first body (1) and is shaped so as to keep the locking pin radially directed with respect to said first body, and in that the two said branches (3 and 4) of the first body are provided with at least one pair of aligned through holes (31 and 32), any one of which holes constitutes the said sliding housing for the locking pin inside said first body.

9. Hinge according to claim 8, characterized in that the first body (1) is symmetrical with respect to the plane (M) perpendicular to the axis (11) of the pivoting shaft (5) and equidistant (L) from the inside faces (12 and 13) of the two branches (3 and 4) of said first body (1).

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