Lower hinge for the tilting shutter of door or window frames

Abstract

 A lower hinge for fixed frames (12) and at least one tilting shutter (13) comprising a male portion (1) which is able to be firmly secured in a known manner to the frame and is provided with a projecting pivot, and a female portion (6) having a through hole which receives a bush having a dead hole able to receive the projecting portion of the pivot of said male portion, wherein said female portion is connected to the moving shutter by a plate firmly secured thereto, which plate has a shaped slot in which a pivot is inserted to connect the plate to an angle bar well secured to the moving shutter and supporting its weight.
Thus, during tilting, the shaped slot causes the angle bar secured and integral with the moving shutter to tilt and to hold the male portion secured to the frame and the female portion adjacent to the same.

Description

[0001] The present patent application for industrial invention relates to a lower hinge for tilting shutter of door or window frames.

[0002] One main problem felt by fitters of metal door or window frames is generally the assembling of the accessories and particularly the tilting shutter the basic part of which is the lower hinge.

[0003] The lower hinge of a tilting shutter should comply essentially with two particular requirements: being sturdy and having an attractive design.

[0004] Most widespread lower hinges for tilting shutters are so-called "comb" hinge formed of a male portion fixed to the frame and abutting against the lower crosspiece and a female portion fixed to the moving shutter by an angle bar loaded by the weight thereof.

[0005] Male portion has a kind of cradle housing the pivot which is in turn rigidly fixed within male portion which allows the shutter both to rotate and to tilt within a rugged construction.

[0006] The main restriction of a known hinge of such type is the design as it looks remarkably different from the typical plain hinges for windows because of geometry and due to the fact that the pivoting pin is located outside the window.

[0007] This causes a lot of problems to the fitter who must use hinges different from standard for all plain windows in a room where there is even only one window with a tilting shutter.

[0008] To solve this problem, some manufacturers make use of hinges with a rotation system having the pivoting pin inside the section bar where the male portion rotates.

[0009] Even though this known technical solution solves the problems of an attractive design, it still has the drawback of a low sturdiness. In fact if the male portion rotates and does not provide any full support upon tilting, this technical solution seriously compromises the sturdiness of the construction and makes it impossible to apply any self-tapping screws to reinforce the male portion.

[0010] Moreover, still because of the rotation of the male portion upon tilting the window, the above solution creates a diagonal component tending to bend the pivot and to limit considerably the strength of the whole tilting system.

[0011] The main object of the present invention is to overcome the problems mentioned above by providing a lower hinge for tilting shutter systems consisting of a first portion, so-called male portion, which is able to be secured to the frame by a plate and two metric screws and provided with a through hole in which a projecting pivot is inserted, and a second portion, so-called female portion, which is provided with a through hole which houses a bush having a dead hole able to receive the projecting portion of the pivot of the above-mentioned male portion.

[0012] The female portion is connected to the moving shutter by a plate firmly secured thereto, which plate has a shaped slot in which a pin connecting the plate to an angle bar secured to the moving shutter and supporting its weight is inserted.

[0013] Upon tilting the shutter, the shaped slot allows the angle bar secured and integral with the moving shutter to tilt and the male portion to be held secured to frame and the female portion adjacent to the same.

[0014] Advantageously, as the shutter is closed, the male and female portions have no design difference from a typical plain hinge due to the fact that the pivoting pin rotates within the section bar and according to the invention is located in the peculiar coupling between the pin and the shaped slot.
A such lower hinge for tilting shutter systems has self-evident advantages.
The male portion firmly secured to frame and resting on the lower crosspiece of the frame guarantees a high stability, and the female portion adjacent to the frame upon tilting protects the pivot from any bending, thus giving the whole system a high sturdiness without compromising the design which is identical to any typical plain window upon closed shutter.

[0015] A better understanding of the invention will result from the following detailed description with reference to the accompanying drawings that show a preferred embodiment thereof only by way of a not limiting example.
In the drawings:

Figure 1A is an exploded view of the first portion of the lower hinge according to the invention;

Figure 1B is an axonometric view of the object of figure 1 that shows the fastening system;

Figure 2 is an exploded view of the second portion of the lower hinge according to the invention;

Figures 3A and 3B show an isometric view and a plan view both with an enlarged detail of the finding applied to a fixed frame, respectively;

Figure 4A and 4B show an isometric view and a plan view both with an enlarged detail of the finding applied to a moving shutter, respectively;

Figure 5A is an isometric view of the finding during a typical opening by rotation on a horizontal plane;

Figure 5B is an isometric view of the finding during a typical opening (with some parts removed for the sake of clarity) with two enlarged details;

Figure 6A is an isometric view of the finding during the tilting of the shutter with an enlarged detail;

Figure 6B is an isometric view of the finding during the tilting of the shutter (with some parts removed for the sake of clarity) with two enlarged details.

[0016] With reference to figures 1A and 1B, the lower hinge for tilting shutter systems according to the present invention consists essentially of two portions.
The first portion is formed by a male member (1) having two flared holes (1a, 1b) where two metric screws (3a, 3b) connecting male member (1) to fastening plate (2) through two threaded holes (2a, 2b) are received, and a through hole (1c) where pivot (4) is inserted by interference, said pivot having a projecting portion (4b) as it is longer than hole (1c).
Referring to figure 2 the second portion consists of a female member (6) having a through hole (6a) in which a bush (5) in inserted having a dead hole (5a) able to receive the projecting portion (4b) of pivot (4).
Female member (6) has two flared holes (6b, 6c) in which two metric screws (8a, 8b) connecting tightly female member (6) to a typical plate (9) through two threaded holes (9c, 9d) are received.
According to a peculiar feature of the invention said plate (9) has a shaped lower slot (9b) in which a suitable pin (7) is housed having a head (7a) and a cylindrical portion (7b) provided with a longitudinal facet (7c), which pin is free to move inside slot (9b) without shifting axially and keeps plate (9) connected to an angle bar (10) through a hole (10b) which is crossed by the shank of a further metric screw (11) tightly screwed into an axial threaded hole (7d) formed in pin (7).
Facet (7c) of pin (7) is able to be coupled with a corresponding facet (10c) of hole (10b), thus preventing screw (11) from being screwed out as pin (7) shifts inside slot (9b), and head (7a) of pin (7) having a diameter greater than the maximum width of slot (9b) holds plate (9) connected to angle bar (10).
Referring to figures 3A and 3B, the disclosed lower hinge for tilting shutters of window or door frames is assembled to fixed frame (12) by causing surface (1d) of male member (1) to abut against surface (12b) of fixed frame (12) and screwing in screws (3a, 3b) so that plate (2) causes surfaces (1f, 1e) of male member (1) to fit against the respective surfaces (12d, 12c) of fixed frame (12).
Referring to figures 4A and 4B the lower hinge according to the invention is assembled to moving shutter (13) by inserting tabs (10d, 10c) of the angle bar (10) into channel (13b) of the section bar of moving shutter (13), and surface (10f) of angle bar (10) rests on surface (13c) of moving shutter (13) and supports the weight of the latter.
Referring to figures 5A and 5B, as the finding is in the opening position with the shutter rotated on a horizontal plane, cylindrical surface (7b) of pivot (7) is tangent to the curved lower surface (9e) of slot (9b) which prevents the latter from moving because of the weight of moving shutter (13) and ensures, together with an upper projection (10g) of angle bar (10) which engage with surface (9f) of the upper end of plate (9) and oppose the action of weight of moving shutter (13), that the sturdy lower hinge is blocked in the opening position, thus making integral with one another the components thereof.
Said curved lower surface (9e) of slot (9b) is essentially "V"-shaped.
Referring to figures 6A and 6B, as the hinge of the invention passes from the opening position like a wing to the tilted position, cylindrical surface (7b) of pin (7) shifts within the shaped slot (9b) from the tangential position to the curved lower surface (9e) to the tangential position to the curved side surface (9f), thus causing moving shutter (13) to tilt.
The diagonal component produced by the weight of shutter (13) pushing pin (7) is applied to the curved surface (9f) which tries to twist pivot (4) but finds opposition by female member (6) having surface (6d) resting on surface (12c) of fixed frame (12), thus ensuring that the sturdy lower hinge is blocked in the opening position and making integral with one another the components thereof.

[0017] The present invention has been described and illustrated according to a preferred embodiment thereof, however, it is self-evident that a number of modifications and/or variations can be made without departing from the scope of the inventive concept. Moreover, all construction details can be replaced by technically equivalent components.

Claims

1. A lower hinge for fixed frames (12) and at least one tilting shutter (13) comprising a male portion (1) which is able to be firmly secured in a known manner to the frame and is provided with a projecting pivot, and a female portion (6) having a through hole which receives a bush having a dead hole able to receive the projecting portion of the pivot of said male portion, characterized in that said female portion is connected to the moving shutter by a plate firmly secured thereto, which plate has a shaped slot in which a pivot is inserted to connect the plate to an angle bar well secured to the moving shutter and supporting its weight, thus providing that during tilting the shaped slot causes the angle bar secured and integral with the moving shutter to tilt and to hold the male portion secured to the frame and the female portion adjacent to the same.

2. The hinge according the preceding claim, characterized in that said female portion (6) has two flared holes (6b, 6c) where two metric screws (8a, 8b) firmly connecting female member (6) to a plate (9) through two threaded holes (9c, 9d) are received, said plate (9) having a lower shaped slot (9b) in which a suitable pin (7) is housed having a head (7a) and a cylindrical portion (7b) provided with a longitudinal facet (7c), which pin is free to move inside slot (9b) without shifting axially and keeps plate (9) connected to an angle bar (10) through a hole (10b) which is crossed by the shank of a further metric screw (11) tightly screwed into an axial threaded hole (7d) formed in pin (7).

3. The hinge according the preceding claim, characterized in that facet (7c) of pin (7) is able to be coupled with a corresponding facet (10c) of hole (10b), thus preventing screw (11) from being screwed out as pin (7) shifts inside slot (9b), and head (7a) of pin (7) having a diameter greater than the maximum width of slot (9b) holds plate (9) connected to angle bar (10).

4. The hinge according the preceding claim, characterized in that said hinge is assembled to moving shutter (13) by inserting tabs (10d, 10c) of the angle bar (10) into channel (13b) of the section bar of moving shutter (13), and surface (10f) of angle bar (10) rests on surface (13c) of moving shutter (13) and supports the weight of the latter.

5. The hinge according the preceding claim, characterized in that in the opening position with the shutter rotating on a horizontal plane, cylindrical surface (7b) of pivot (7) is tangent to the curved lower surface (9e) of slot (9b) which prevents the latter from moving because of the weight of moving shutter (13) and ensures, together with an upper projection (10g) of angle bar (10) which engage with surface (9f) of the upper end of plate (9) and oppose the action of weight of moving shutter (13), that the sturdy lower hinge is blocked in the opening position, thus making integral with one another the components thereof.

6. The hinge according the preceding claim, characterized in that said curved lower surface (9e) of slot (9b) is essentially "V"-shaped.

7. The hinge according claim 4 or 5, characterized in that as the hinge passes from the opening position like a wing to the tilted position, cylindrical surface (7b) of pin (7) shifts within the shaped slot (9b) from the tangential position to the curved lower surface (9e) to the tangential position to the curved side surface (9f), thus causing moving shutter (13) to tilt and providing that the diagonal component produced by the weight of shutter (13) pushing pin (7) is applied to the curved surface (9f) which tries to twist pivot (4) but finds opposition in the female member (6) having surface (6d) resting on surface (12c) of fixed frame (12), thus ensuring that the sturdy lower hinge is blocked in the opening position and making integral with one another the components thereof.

Drawing