EP2738329A1

EP2738329A1 - Embedded hinge for reversible door

Info

Publication number: EP2738329A1
Application number: EP12194858.2A
Authority: EP
Inventors: Ivo Pellegri
Original assignee: Pellegri Ivo
Current assignee: Pellegri Ivo
Priority date: 2012-11-29
Filing date: 2012-11-29
Publication date: 2014-06-04
Anticipated expiration: 2032-11-29
Also published as: EP2738329B1

Abstract

A pintle element (1) and a seat holder insert (11) for an embedded hinge (2) for reversible doors comprising a frame, formed of one cross-member (3) and a pair of uprights (4), and at least one panel (5). The pintle element (81) being suitable for being fitted at one end of the uptight (4) and comprising:
- a pin (6) extending in a longitudinal direction in relation to the panel (5),
- a support plug (7) of the pin (6) extending perpendicular to the axis of the pin (6), characterised in that it further comprises an appendage (8) formed of at least one first abutment surface (9) on an upright (4), suitable for preventing translations of the pintle element (1) in an orthogonal direction during assembly, a second abutment surface (10) on the same upright (4), suitable for preventing translations of the pintle element (1) in a transversal direction during assembly, and a third abutment surface (21) on the cross-member (3)suitable for preventing translations of the pintle element (1) in a longitudinal direction during assembly.

A method of fitting reversible doors with embedded hinge (2) is also illustrated.

Description

The present invention relates to an embedded hinge for a reversible type door.
In particular the present invention relates to a pintle element and a seat holder insert which form an embedded hinge for a reversible door, a door suitable for being used with such hinge and a method of fitting such reversible door by means of such embedded hinge.
In the present description and in the subsequent claims the term "embedded hinge" indicates a hinge at least partially embedded in a door, that is, in the panel or in the frame of the door.
The term "reversible door" indicates a door suitable for being fitted so as to open on the right or so as to open on the left and the opening direction of which (right or left) may be decided at the moment of fitting.
Doors of this type have been known of for many years. The first reversible doors invented had the disadvantage of requiring long and laborious assembly operations of the panel to the rim of the frame, as well as long and laborious operations for changing the direction of opening.
To try and overcome such drawbacks pintle holder brackets with removable pintles were made. These have only partially overcome the drawback described above, entailing moreover aesthetic and economic disadvantages.
A further known method of overcoming such disadvantages describes a reversible door combination comprising a frame and a panel joined to it by means of an embedded hinge fitted with a pintle housed in one or other of two seats extending in the thickness of the panel. In such latter solution at least one access passage of the pintle to the seats open onto it and onto the outside of the panel, as well as means of removably holding the pintle in the seats are also envisaged.
Such solution despite overcoming the drawback of the long and laborious operations of fitting and removing the doors, has the drawback of requiring particular predispositions on the frame with consequent elevated manufacturing and storage costs as well as limited versatility, due to the fact that special frames need to be produced for such doors.
Such prior method has, in addition application limitations in that it can only be used in the case of doors without a ledge. It also has the intrinsic drawbacks of ledge-free doors, that is to say the poor noise and light insulation.
Lastly, such prior method has the drawback of not permitting a perfect closure of the door on the floor. In other words, such prior method, envisaging two seats which extend into the thickness of the door, does not permit fitting of the panel in a vertical sliding manner. In other words, such prior method entails a gap between the panel and the floor, with consequent disadvantages as regards the insulation of the rooms which the door connects.
The purpose of the present invention is therefore to make available a pintle element for an embedded hinge, a seat holder insert for an embedded hinge and an embedded hinge, which makes it possible to overcome the aforementioned problems of lengthy and laborious assembly, imperfect appearance, imprecise assembly, poor insulation, high costs and limited range of application.
A further purpose of the present invention is to make available a reversible door which is economical, simple to fit and which achieves a high level of insulation.
A further purpose of the present invention is to make available a method of fitting a door with an embedded hinge which is simple, fast, accurate, economical and versatile.
A further purpose of the present invention is to make available a pintle element, a seat holder insert, an embedded hinge, a reversible door and a method of fitting such door which makes it possible to avoid special predispositions on the frame, that is to say machining which makes such frames specific for a sole application.
These and other purposes are achieved by means of a pintle element for an embedded hinge for reversible doors comprising at least one panel and one frame, said frame being composed of a cross-member and a pair of uprights, said pintle element being suitable for being fitted at one end of an upright and comprising:

a pin extending in a longitudinal direction,
a support plug of the pin extending perpendicular to the axis of the pin, and
an appendage formed of at least one first abutment surface on an upright, suitable for preventing translations of the pintle element in an orthogonal direction during assembly, a second abutment surface on the same upright, suitable for preventing translations of the pintle element in a transversal direction during assembly, and a third abutment surface on the cross-member, suitable for preventing translations of the pintle element in a longitudinal direction during assembly.

In the present context and in the subsequent claims, the longitudinal and transversal directions refer to the directions of the axes of the panel of the door, save as indicated otherwise. Moreover, the term orthogonal direction is taken to mean the direction orthogonal to said longitudinal and transversal directions.
Such directions are indicated in figure 1.
A pintle element, as described above, makes it possible to overcome the aforementioned problems.
In particular the presence of at least one first and one second abutment surface on an upright, and a third abutment surface on a cross-member, as described above, makes it possible to rapidly and accurately identify the assembly positions of the pintle element, without requiring special predispositions on the frame. It therefore proves versatile, in other words applicable to any frame of the prior type.
It also proves economical, makes it possible to decide the direction of opening at the moment of fitting and avoids storage costs in that it does not require dedicated frames.
According to preferred embodiments, said first abutment surface and said second abutment surface are surfaces of respective elements orthogonal and integral with each other.
Such embodiments permit very fast and precise positioning of the pintle element.
According to alternative embodiments, said first abutment surface and said second abutment surface are orthogonal surfaces of a single element.
These embodiments are extremely economical to produce, transport and store.
Preferably, the support plug is plate-shaped, so as to occupy a limited space and be of limited visibility.
According to a second aspect, the invention relates to a seat holder insert for an embedded hinge for reversible doors comprising a frame, composed of a cross-member and a pair of uprights, and at least one panel, said seat holder insert being suitable for being fitted at one end of the panel and comprising at least one seat suitable for housing a pin of the hinge, at least one access passage of the pin in the at least one seat and means able to removably hold the pin in the seat, said passage permitting access of the pin in a direction perpendicular to the axis of the pin, said passage being provided with at least one surface oblique to the transversal axis of the seat.
Such insert permitting a rapid insertion of the pin in its seat and, consequently, entailing simple and rapid assembly operations.
In particular the presence of a passage permitting access of the pin in a direction perpendicular to the axis of the pin , avoids complex hoisting operations of the panel to permit the entrance from above, in other words along the pin direction.
Moreover, the presence of one or more oblique surfaces of the passage, permits a single easy insertion manoeuvre of the pin, overcoming the disadvantage of the prior art mentioned above which requires two articulated insertion manoeuvres.
The seat holder insert according to the invention may, moreover, be applied to any door panel, with or without a ledge.
According to some actuation embodiments of the present invention, the reversible door is fitted with a ledge and the seat holder insert is suitable for being fitted in the thickness of the ledge.
This permits fitting of the door in a vertical sliding manner and a consequent improved insulation of the rooms which the door connects.
According to preferred embodiments, the means suitable for removably holding the pin in the seat, comprise an obturator suitable for translating in a direction perpendicular to the axis of the pin ( after assembly). It is preferably operated by an elastic or equivalent means.
Such obturator permits rapid and simple insertion of the pin and, consequently, rapid and simple assembly operations, secures the pin in the seat and permits fast and simple removal operations.
According to preferred embodiments, the obturator is provided with at least one oblique wall. It forms, together with the aforementioned oblique surface, the passage for the pin, consequently achieving the same advantage mentioned earlier, that is the simplification and elimination of the insertion manoeuvres of the pin.
Preferably, at least one out of the oblique surface of the passage and the oblique wall of the obturator is parallel to the axis of the pin and forms an angle α preferably of 5° to 135° with the transversal axis A of the seat.
Such angle α is even more preferably 10° to 85°, this way the access of the pin is facilitated. According to a further aspect, the invention relates to an embedded hinge for reversible doors comprising a pintle element as described above and a seat holder insert as described above.
Such a hinge makes it possible to achieve fast, simple ad accurate fitting, avoiding problems of misalignment.
It further resolves the problem related to the appearance, inasmuch as not visible.
Such hinge is also economical and versatile, in that it can be applied to any reversible door of the known type, with or without ledge and does not require predispositions on the frame. According to a further aspect, the invention relates to a reversible door comprising a frame, composed of a cross-member and a pair of uprights, and at least one panel, which comprises moreover the hinge as described above.
Such a door is simple and fast to install, economical and of a pleasing appearance. Preferably, the panel of such a door is fitted with a ledge and a housing for the seat holder insert made in the thickness of the ledge.
This way, the vertical sliding installation of the door on the ground is possible and therefore an improved insulation between the two rooms communicating via the door.
According to a last aspect, the invention relates to a method of fitting a reversible door with embedded hinge, said door comprising at least one panel and one frame, composed of a cross-member and a pair of uprights, comprising the steps of:

a. resting a first pintle element as described above on its abutment surfaces and attaching it to the upright at one of its upper ends;
b. resting a second pintle element as described above on its abutment surfaces and attaching it to the upright at one of its lower ends;
c. housing a first seat holder insert inside a seat made at an upper end of the panel and attaching it thereto;
d. housing a second seat holder insert inside a seat made at a lower end of the panel and attaching it thereto;
e. moving the panel towards the upright so as to push the pins to enter transversally in the respective seats through the respective passages.

Such method makes it possible to eliminate machining on the frame aimed at making special predispositions, and measurement steps relative to the positioning of the pin and its seat, with consequent advantages from the point of view of the speed and ease of fitting, as well as regards versatility and cost.
Moreover, such method makes it possible to avoid problems of alignment thanks to the automatic alignment resulting from the shape of the pintle element and the seat holder insert. For a better understanding of the invention and its advantages, a description of some embodiments of the pintle element will be provided below by way of a non-limiting example, of the seat -holder insert, of the hinge, of the reversible door and of the fitting method of the invention with reference to the appended drawings wherein:

figure 1 shows a schematic perspective view of a door fitted with two hinges according to one embodiment of the present invention.
figure 2 is a perspective view of a pintle element according to a first embodiment of the invention;
figures 3a, 3b and 3c respectively show a plan, front and side view of the pintle element in figure 2;
figures 4 and 4a are respectively a perspective view and a side view of a pintle element according to a second embodiment of the invention;
figures 5 and 5a are respectively a perspective view and a side view of a pintle element according to a third embodiment of the invention;
figures 6a, 6b and 6c are perspective views of further embodiments of the pintle element;
figure 7 is a perspective view of a pintle element according to a fourth embodiment of the invention;
figure 8 is a perspective view of a pintle element according to a fifth embodiment of the invention;
figure 9 shows a hinge comprising the pintle element in figure 2 and a seat holder insert according to a first embodiment of the invention;
figure 10 shows a seat holder insert according to a second embodiment of the invention;
figure 11 shows a hinge formed of the pintle element in figure 7 and the seat holder insert in figure 10, after fitting;
figures 12a-12e show pintle elements according to embodiments different from the present invention, fitted on respective frames;
figures 13a and 13b shows a hinge formed of a pintle element fitted on a frame and a seat holder insert fitted on a panel, respectively before and after fitting of the panel , according to one embodiment of the present invention;
figure 14A shows a seat holder insert according to a further embodiment of the invention;
figure 14B shows the insert in Figure 14A fitted on a panel of a door with ledge.
figure 15A shows a seat holder insert according to a further embodiment of the invention;
figure 15B shows the insert in Figure 15A fitted on a panel of a door with ledge.

With reference to the figures 1-13, a pintle element for an embedded hinge is globally denoted by reference numeral 1; a seat holder insert suitable for receiving the pin of the pintle element is globally denoted by reference numeral 11; an embedded hinge is globally denoted by reference numeral 2.
Figure 1 schematically shows a door of the reversible type, with fitting completed. It comprises a frame which in turn comprises a cross-member 3 and a pair of uprights 4.The door comprises moreover at least one panel 5. In figure 1 there is a single panel, however the invention also relates to doors having several panels 5.
Figure 1 shows the longitudinal direction I, transversal t and orthogonal direction o, to which reference is made in the present description and in the subsequent claims.
The door is fitted with 2 embedded hinges.
Each of said hinges 2 comprises a pintle element 1, suitable for being fitted at one end of an upright 4,and a seat holder insert 11 suitable for being fitted at a corresponding end of the panel 5, so as to permit the coupling of the panel 5 to the frame .
The pintle element 1 comprises a pin 6 which extends in a longitudinal direction, that is, the longitudinal direction I of the panel 5.
Such pin 6 is integral with a support plug 7 of the pin 6, which extends perpendicular to the axis of the pin 6, in the transversal t and orthogonal o directions.
The support plug 7 is preferably plate-shaped.
According to the present invention, the pintle element 1 further comprises an appendage 8 formed of at least one first abutment surface 9 on an upright 4,a second abutment surface 10 on the same upright 4, and a third abutment surface 21 on the cross-member 3. These are suitable for abutting with the upright 4 and cross-member 3, that is, resting against them, so as to prevent translations of the pintle element 1 in the respective orthogonal, transversal and longitudinal direction, during assembly.
In fact, once such surfaces abut and a univocal position is therefore identified for the pintle element 1 it is attached by screws or other means of attachment, preferably through the holes 20 made on said pintle element 1.
According to preferred embodiments of the invention, the first abutment surface 9 and the second abutment surface 10 are surfaces of respective elements 18, 19 orthogonal and integral with each other.
In other words, the first abutment surface 9 belongs to a first element 18 and the second abutment surface 10 belongs to a second element 19.
In the first embodiment, shown in the figures 2 and 3a-3c, such elements bearing such abutment surfaces 9, 10 are two separate elements 18, 19, connected to each other so as to be orthogonal. In particular, the first abutment surface 9 belongs to a first element 18 integral with the support plug 7 and made in one piece therewith, while the second abutment surface 10 belongs to a second, parallelepiped shaped element 19, integral with the first element 18. In the second and third embodiments also, shown respectively in the figures 4, 4a and 5, 5a, the abutment surfaces belong to separate elements 18, 19 integral with each other. In particular the first element 18 bearing the first abutment surface 9 and the second element 19 bearing the second abutment surface 10, are two parallelepiped shaped elements, integral and orthogonal to each other and made in one piece with the support plug 7.
In the further embodiments also, shown in figures 6a, 6b and 6c, such abutment surfaces may belong to separate elements connected to each other by suitable connectors.
In each of said first, second and third embodiments and in the further embodiments, the third abutment surface 21 on the cross-member is a surface of the second element 19, which is orthogonal to the first abutment surface 9 and to the second abutment surface 10.
To particular advantage the three abutment surface are formed of a single plate bent at an angle of 90° along a (single) (straight) bending line of the plate, said bending forming an inner side (on which the inner bending angle of 90° may be identified) and an outer side (on which the corresponding outer bending angle of 270° may be identified). The bent plate has a (single) first flat portion and (single) second flat portion extended on planes orthogonal to each other and connected to each other along the bending line, wherein:

the second flat portion 19 forms the holes 20 and the second abutment portion 10 on the outer side of the plate;
the first flat portion 18 forms the third abutment surface 21 on the outer side of the plate and the first abutment surface 9 on a side rim facing towards the second flat portion 19. Advantageously, the plate itself is a U-shape with a base and a first leg together forming the first flat portion 18and a second leg forming the second flat portion 19 and bent out of the plane of the base and first leg.

In the fourth and fifth embodiments rather, shown in figures 7 and 8, the first abutment surface 9 and said second abutment surface 10 are orthogonal surfaces of a single element. The third abutment surface 21 is the third surface of such single element and/or a surface of a further element, orthogonal to the first two.
In particular in the fourth embodiment, shown in the figures 7 and 11, the first abutment surface 9 is a side surface of parallelepiped shaped element, the second abutment surface 10 is a bottom surface of said parallelepiped and the third abutment surface 21 is a further side surface of the same parallelepiped. Such latter is assisted in its abutment function by the support plug 7.
In the fifth embodiment, shown in figure 8, such abutment surfaces are orthogonal surfaces of a C-shaped element.
The second embodiment, shown in figures 4 and 4a, shows a pintle element 1 wherein the second element 19 bearing the second abutment surface 10, is provided with a tear line I suitable for permitting the elimination of a portion thereof so as to obtain the pintle element 1 according to third embodiment, shown in figures 5 and 5a.
The pintle element 1 shown in figures 4 and 4a may be used as is and therefore for hinges fitted to the lower ends of doors, wherein the abutment in a longitudinal direction is provided by the floor, or may be modified by the simple removal of a portion thereof, along the tear line I, as shown in figures 5 and 5a and then used for hinges fitted to the upper ends of doors,
In other words, the removal of such portion has the purpose of translating the third abutment surface 21 into the desired position, as needed.
The present invention also relates to a seat holder insert 11 for an embedded hinge 2, suitable for being fitted at one end of the panel 5. It comprises at least one seat 12 suitable for housing the pin 6 of the hinge 2, at least one access passage13 of the pin 6 in the at least one seat 12 and means suitable to removably hold the pin 6 in the seat 12.
The passage 13 is such as to permit access of the pin 6 in a direction perpendicular to the axis of the pin 6. In other words, such passage 13 opens in an orthogonal and transversal direction.
According to the present invention, the passage 13 is further provided with at least one surface oblique 14 in relation to the transversal axis A of the seat 12.
Preferably, such oblique surface 14 is parallel to the axis of the pin 6 and forms an angle α preferably between 5° and 135° with the transversal axis A of the seat.
Such angle α is even more preferably between 10° and 85°.
In the first embodiment shown in figure 9, such seat holder insert 11 comprises a single seat 12, while according to the second embodiment, shown in figures 10 and 11, it comprises two seats 12 selectively engageable by the pin 6.
The means suitable to removably hold the pin 6 in the seat 12, comprise an obturator 15 preferably provided with at least one oblique wall 16. In particular in the first embodiment, the obturator 15 comprises one oblique wall 16, while in the second embodiment, it comprises two oblique walls 16, one at the point of each seat 12.
The oblique wall 16 is preferably positioned so as to favour the entrance of the pin through the passage 13 and then in the seat 12.
The obturator 15 could also be provided with bevelled and /or spheroid surfaces.
The obturator 15 is suitable for translating in a direction perpendicular to the pin axis 6 (with reference to the assembly position) operated by an elastic means 17, so as to open and close the passage 13.
Preferably, each oblique wall 16 of the obturator 15 is parallel to the axis of the pin 6 and forms an angle α preferably between 5° and 135° with the transversal axis A of the seat. Such angle α is even more preferably between 10° and 85°.
The present invention also relates to the embedded hinge 2 formed by said pintle element 1 and by said seat holder insert 11, as well as to a reversible door incorporating such hinge 2. In particular the panel 5 of the door according to the invention is provided with four housings at its four corners.
Each of such housings is suitable for housing a seat holder insert 11.
Once the opening direction of the reversible door has been chosen, one upper seat and one lower seat are closed using a suitable cover, while the remaining two seats house the respective seat holder inserts11.
Preferably the panel 5 is provided with a ledge. In such case, the housings for the seat holder inserts are made in the thickness of the ledge, so as to be in an external position to the panel and not occupy the inner space of the panel.
According to a further embodiment, (Figures 14A, 14B, 15S, 15B) the seat holder insert 11 may comprise a base body 22 which forms the aforementioned seat 12 for housing the pin 6, as well as an attachment block 23 with one or more attachment holes 24 for the connection of the seat holder insert 11 in the dedicated cavity 25 of the panel 5.The attachment block 23 is housed in an adjustment seat 26 of the base body 22 so as to slide within certain limits (preferably in a single adjustment direction R parallel to the transversal direction t and lockable in a desired position inside said adjustment seat 26. Advantageously, the adjustment and the blocking of the position of the attachment block 23 in the adjustment seat 26 may be performed using an adjustment screw 27.
This permits fine adjustment of the position of the panel 5 in relation to the frame of the door. According to one possible embodiment, the adjustment screw 27 has a threaded stem partially screwed into a corresponding threaded hole of the attachment block 23 and a portion, such as the head of the screw, widened in relation to the threaded stem and constrained in the base body 22 against shifts in the adjustment direction R. The base body 22 itself may form an access passage for reaching the head of the adjustment screw 27 using a screwdriver or an Allen wrench in the case of a screw with a recessed hexagonal head. In order to permit use of the same seat holder insert 11 above or below or on the right or left side of the panel, the adjustment seat 26 is shaped, for example symmetrical to a plane parallel to that defined by the orthogonal axis o and transversal axis t such as to receive the attachment block 23 in a longitudinal direction I from two opposite sides and to transmit the tightening force of the attachment screws to the base body 22, depending on the side of insertion of the attachment block 23, at will in one or other longitudinal direction I (Figures 14A, 15A). It is therefore sufficient to overturn the seat holder insert 11 in relation to the panel and overturn the attachment block 23 in relation to the base body 22 of the insert 11.
In the examples of embodiment shown in figures 14A and 15A and also applicable to the other embodiments described above, the adjustment seat 26 may form two opposite parallel ribs 28, extending in a transversal direction t and the attachment block 23 may have an elongated shape with a substantially constant transversal "T" cross-section, such as to be insertable in the adjustment seat 26 from both sides and suitable for abutting against the ribs 28.
Alternatively, the attachment block 23 may be non-separable from the adjustment seat 26 and be inserted therein with a shape coupling such as to transmit the tightening force of the attachment screws to the base body 22 in two opposite longitudinal directions I. In this case the attachment holes 24 are shaped to permit the passage of the attachment screws from two opposite sides.
The present invention also relates to a method of fitting a reversible door with embedded hinge 2, of the aforementioned type.
After selecting the direction in which the door is to open, the method envisages the steps of:

a. resting a first pintle element 1 on its abutment surfaces 9, 10 and 21 and attaching it to the upright 4 at one of its upper ends;
b. resting a second pintle element 1 on its abutment surfaces 9, 10, 21 and attaching it to the upright 4 at one of its lower ends;
c. housing a first seat holder insert 11 inside a seat made at an upper end of the panel 5 and attaching it thereto;
d. housing a second seat holder insert 11 inside a seat made at a lower end of the panel 5 and attaching it thereto;
e. moving the panel 5 towards the upright 4 so as to push the pins 6 to enter transversally in the respective seats 12 through the respective passages 13.

Preferably, before the step of moving the panel and upright towards each other, a step of covering the two housings respectively at an upper end and a lower end of the panel 5, on the side longitudinally opposite the housings engaged by the seat holder inserts 11, is envisaged.
Such step takes place by using suitable covers.
A person skilled in the art may make further modifications and variations to the pintle element 1, seat holder insert 11, embedded hinge 2, reversible door and to the method according to the present invention so as to satisfy contingent and specific requirements while remaining within the sphere of protection of the present invention.

Claims

Pintle element (1) for an embedded hinge (2) for reversible doors comprising a frame, formed of one cross-member (3) and a pair of uprights (4), and at least one panel (5), said pintle element (1) being suitable for being fitted at one end of an upright (4) and comprising:
- a pin (6) extending in a longitudinal direction,

- a support plug (7) of the pin (6) extending perpendicular to the axis of the pin (6), characterised by the fact of further comprising an appendage (8) formed of at least one first abutment surface (9) on an upright (4), suitable for preventing translations of the pintle element (1) in an orthogonal direction during assembly, a second abutment surface (10) on the same upright (4),suitable for preventing translations of the pintle element (1) in a transversal direction during assembly, and a third abutment surface (21) on the cross-member (3)suitable for preventing translations of the pintle element (1) in a longitudinal direction during assembly.
Pintle element (1) according to claim 1, wherein said first abutment surface (9) and said second abutment surface (10) are surfaces of respective elements (18, 19) orthogonal and integral with each other.
Pintle element (1) according to claim 1, wherein said first abutment surface (9) and said second abutment surface (10) are orthogonal surfaces of a single element.
Pintle element (1) according to any of the claims 1-3, wherein said support plug (7) is plate-shaped.
Pintle element (1) according to any of the claims 1-4, wherein the appendage (8) is composed of a single plate bent at an angle of 90° along a single straight bending line, said bending determining an inner concave side and an outer convex side of the plate, said bent plate having a single first flat portion and a single second extended portion on planes orthogonal to each other and connected to each other along said bending line, wherein:
- the second flat portion (19) forms holes (20) and the second abutment portion (10) on the outer side of the plate;

- the first flat portion (18) forms the third abutment surface (21) on the outer side of the plate and the first abutment surface (9) on a side rim facing towards the second flat portion (19).
Pintle element (1) according to claim 1-4, wherein advantageously, the plate itself is a U-shape with a base and a first leg together forming the first flat portion (18),and a second leg bent out of the plane of the base and the first leg forming the second flat portion (19).
Seat holder insert (11) for an embedded hinge (2) for reversible doors comprising a frame, composed of a cross-member (3) and a pair of uprights, (4), and at least one panel (5),said seat holder insert (11) being suitable for being fitted at one end of the panel (5)and comprising at least one seat (12) suitable for housing a pin (6) of the hinge (2), at least one access passage (13) of the pin (6) in the at least one seat (12) and means suitable to removably hold the pin (6) in the seat (12), said passage (13) permitting access of the pin (6) in a direction perpendicular to the axis of the pin (6), said passage (13) being provided with at least one surface (14) oblique to the transversal axis of the seat (12).
Seat holder insert (11) according to claim 7, wherein said reversible door is fitted with a ledge and the seat holder insert (11) is suitable for being fitted in the thickness of the ledge.
Seat holder insert (11) according to claim 7 or 8, wherein means suitable for removably holding the pin (6) in the seat (12), comprise an obturator (15) suitable for translating in a direction perpendicular to the axis of the pin (6).
Seat holder insert (11) according to claim 9, wherein said obturator (15) is provided with at least one oblique wall (16).
Seat holder insert (11) according to any of the claims from 7 to 10, comprising a base body (22) which forms the aforementioned seat (12) for housing the pin (6), as well as an attachment block (23) with one or more attachment holes (24) for the connection of the seat holder insert (11) to the panel (5),said attachment block (23) being housed so as to slide in an adjustment seat (26) of the base body (22) and blockable in an adjustment position by means of an adjustment screw (27).
Seat holder insert (11) according to claim 11, wherein the adjustment seat (26) is shaped so as to receive the attachment block (23) in a longitudinal direction (I) from two opposite sides and to transmit the tightening force of the attachment screws to the base body (22), depending on the side of insertion of the attachment block (23), at will in one or other longitudinal direction (I).
Embedded hinge (2) for reversible doors comprising a pintle element (1) according to any of the claims 1-6 and a seat holder insert (11) according to any of the claims 7-12.
Reversible door comprising a frame, formed of one cross-member (3) and a pair of uprights (4), and at least one panel (5), characterised in that it further comprises a hinge (2) according to claim 13.
Reversible door according to claim 14, wherein the panel (5) of such a door is fitted with a ledge and a housing for the seat holder insert (11) which is made in the thickness of the ledge.