Hinge for doors or windows provided with device to lock the hinge pin

Abstract

 Hinge for doors and windows comprising a first hinging element (20) attached to a mobile part (12) of a door or window (14) and provided at least with a first seating (28) into which a pin (26) is inserted, and a second hinging element (22), attached on a fixed part (15) on which the mobile part (12) is hinged, wherein the second hinging element (22) comprises one end (30) provided with a second seating (32) into which the pin (26) is inserted, provided with an annular throat (50). The pin (26) also comprises a groove (54) which starts substantially in correspondence with the annular throat (50) and ends at one end of the pin (26), under the throat (50). The end (30) of the second hinging element (22) comprises a protuberance (40), protruding inside the second seating (32), which is inserted first into the groove (54) and then into the annular throat (50) of the pin (26), to prevent the axial unthreading of the pin (26).

Description

FIELD OF THE INVENTION

[0001] The present invention concerns a hinge for doors or windows or suchlike. The hinge according to the present invention is provided with an anti-unthreading device which prevents the pin from coming out from the hinging elements in an involuntary and unwanted manner.

BACKGROUND OF THE INVENTION

[0002] A hinge for doors and windows is known, provided with an anti-unthreading device, which comprises a strap able to be fixed on the mobile part of the door or window, for example a panel; a pintle, able to be fixed on the fixed frame or on the wall, and a connection pin. The strap is shaped so as to have at one end a pair of coaxial eyelets separated so as to define an intermediate compartment in which one end, in the form of a bushing, of the pintle is able to be housed. The pin is able to be inserted into the two eyelets and also into the pintle passing in the bushing, and comprises an annular throat disposed in a substantially median position. The annular throat is able to cooperate with a clamping screw able to be screwed into a threaded hole disposed radially in the bushing body of the pintle. In this way, when the tip of the screw is inserted into the throat, it prevents the axial sliding of the pin and hence prevents the pin from coming out of its seating.

[0003] One disadvantage of the known hinge is that the clamping screw is difficult to position and easy to lose, also because of its small size. Consequently, those installing the hinge frequently omit to position the clamping screw correctly, with the inevitable result that the pin can come out extremely easily, also only because of the movements of the panel.

[0004] Another disadvantage of the known hinge is the high cost of production, due to the presence of the clamping screw and the need to make the corresponding threaded hole in the pintle, and also the subsequent cost of installation, especially because of the time used by the fitters to screw the little clamping screw into the corresponding threaded hole.

[0005] Purpose of the present invention is to make a hinge for doors and windows, which is provided with an anti-unthreading device that is simple and quick to install and which does not provide to use auxiliary elements to be coupled with the pin, so as to prevent unwanted axial movements thereof.

[0006] The Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.

SUMMARY OF THE INVENTION

[0007] The present invention is set forth and characterized in the independent claim, while the dependent claims describe other characteristics of the invention or variants to the main inventive idea.

[0008] In accordance with the above purposes, a hinge for doors and windows provided with an anti-unthreading device according to the present invention comprises a first hinging element able to be attached to a mobile part of a door or window and provided at least with a first seating, into which a pin is able to be inserted. The hinge comprises a second hinging element able to be attached on a fixed part and on which the mobile part of the door or window is able to be hinged. The second hinging element of the hinge comprises one end provided with a second seating into which the pin is able to be inserted, which is provided with an annular throat.

[0009] According to a characteristic feature of the present invention, the end of the second hinging element also comprises a protuberance protruding inside the second seating and able to cooperate with the annular throat of the pin. Furthermore, the latter is advantageously provided with a groove, which starts substantially in correspondence with said annular throat and ends substantially at one end of the pin, under the annular throat. In this way, when the pin is inserted into the corresponding seatings of the two hinging elements, said protuberance cooperates first with the groove and then with the annular throat.

[0010] Advantageously, the groove is not of the axial type, that is, parallel to the longitudinal axis of the pin, but has a shape such that it is very difficult for the pin to come out, autonomously and accidentally, from the seatings in which it finds itself.

[0011] According to a preferential embodiment, the protuberance is made in a single piece with the end of the second hinging element.

[0012] According to a variant, said groove has a helical shape, to allow insertion by means of progressive screwing of the pin.

[0013] According to another variant, said groove has an irregular shape and comprises at least a transverse segment with respect to the longitudinal axis of the pin.

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] These and other characteristics of the present invention will become apparent from the following description of a preferential form of embodiment, given as a non-restrictive example with reference to the attached drawings wherein:

• fig. 1 is a front view of a hinge according to the present invention mounted on a door or window;
• fig. 2 is a view from above, partly sectioned, of a detail of the hinge in fig. 1;
• fig. 3 is a front view of a first element of the hinge in fig. 1;
• fig. 4 is a front view of a second element of the hinge in fig. 1;
• fig. 5 is a view from above of the element of the hinge in fig. 4;
• fig. 6 is a front view of a detail of the hinge in fig. 1;
• fig. 7 is a variant of the detail in fig. 6.

DETAILED DESCRIPTION OF A PREFERENTIAL FORM OF EMBODIMENT

[0015] With reference to fig. 1, a hinge 10 for doors and windows provided with an anti-unthreading device according to the present invention is used to hinge a panel 12 of a door or window 14 with respect to a fixed part 15, for example consisting of a wall or a fixed frame.

[0016] The hinge 10 essentially comprises a strap 20, able to be attached with any known means whatsoever, for example screws, to the panel 12; a pintle 22, able to be fixed to the fixed part 15, and a pin 26.

[0017] The strap 20 (figs. 1 and 3) comprises a pair of eyelets 28, an upper and a lower, of the same size, disposed coaxial and separate so as to define an intermediate compartment 29 in which one end 30 of the pintle 22 is interposed.

[0018] The end 30 of the pintle 22 is in the form of a substantially cylindrical bushing, provided with a cavity 32 having a diameter equal to the diameter of the eyelets 28 of the strap 20,and a height slightly less than the height of the compartment 29.

[0019] According to a characteristic feature of the present invention, the end 30 of the pintle 22 comprises a protuberance 40 protruding from the internal surface of the cavity 32, and made in a piece therewith, for example by deformation of the material.

[0020] The pin 26 (fig. 6) comprises a head 46 and a body 48 which at about half its height has an annular throat 50 with a depth at least equal to the protuberance 40. On the part of the body 48, under the annular throat 50, a groove 54 is made, in this case helical, which starts substantially from the annular throat 50 and ends at the end of the body 48. The groove 54 is made in any known manner, for example by rolling the lower end of the body 48 of the pin 26.

[0021] The pin 26 is able to be inserted (figs. 1 and 2) both into the eyelets 28 and also inside the cavity 32 of the end 30, in order to hinge the strap 20 to the pintle 22.

[0022] The hinge 10 as described heretofore is assembled as follows.

[0023] The strap 20, attached to the panel 12, is disposed so as to align the eyelets 28 coaxially with the cavity 32 of the end 30 of the pintle 22. The pin 26 is then inserted through the upper eyelet 28 of the strap 20 in through manner. The pin 26 is then screwed with its helical groove 54 onto the protuberance 40, until the pin 26 is completely inserted in the lower eyelet 28.

[0024] In this position the protuberance 40 is disposed in the annular throat 50 and substantially prevents the accidental axial movement and unthreading of the pin 26 from the strap 20 and from the pintle 22.

[0025] According to a variant, shown in fig. 7, the groove 54 has an irregular shape and comprises at least a transverse segment 55.

[0026] It is clear that modifications and/or additions of parts may be made to the hinge 10 as described heretofore, without departing from the field and scope of the present invention.

[0027] It is also clear that, although the present invention has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of hinge 10, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.

Claims

1. Hinge for doors and windows comprising a first hinging element (20), able to be attached to a mobile part (12) of a door or window (14) and provided at least with a first seating (28) into which a pin (26) is able to be inserted, and a second hinging element (22), able to be attached on a fixed part (15) on which said mobile part (12) is able to be hinged, wherein said second hinging element (22) comprises one end (30) provided with a second seating (32) into which said pin (26) is able to be inserted, and wherein said pin (26) is provided with an annular throat (50), characterized in that said pin (26) also comprises a groove (54) which starts substantially in correspondence with said annular throat (50) and ends substantially at one end of said pin (26), under said throat (50), and in that said end (30) of the second hinging element (22) comprises a protuberance (40), protruding inside said second seating (32), and able to be inserted first into said groove (54) and then into said annular throat (50) of said pin (26), to prevent the axial unthreading of said pin (26).

2. Hinge as in claim 1, characterized in that said protuberance (40) is made in a single piece with said end (30).

3. Hinge as in claim 1 or 2, characterized in that said groove (54) has a substantially helical shape.

4. Hinge as in claim 1 or 2, characterized in that said groove (54) has an irregular shape and comprises at least a transverse segment (55).

Drawing