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(11) | EP 1 602 793 A2 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Burglar-proof hinge for doors and windows |
| (57) A burglar-proof hinge for rotatingly connecting a wing (5) of a window/door of a
room to the respective frame (4) comprising a first hinge element (1) connected to
the frame (4) of the window/door, a second hinge element (2) connected to the wing
of said window/door and a pin (3) pivotally connecting said first and said second
hinge elements to each other. The frame has a lip (8a) extending parallel to the median
plane of said window/door at the second hinge element and on the side of the frame
turning outwardly from the room and a fin (12) extends from the second hinge element,
parallel to the median plane of the window/door, suitable for abutting from the inside
on the edge when the window is in a closed condition and for opposing to any outward
traction on the wing. |
[0001] The present invention relates in general to the field of accessories for doors and windows and more particularly refers to a hinge for windows and doors structured so as to prevent burglaries.
[0002] As is known, in the field of doors and windows made of aluminium it is very important to achieve high resistance to burglary in the structure. In windows and doors opening outwards protection against burglaries is more difficult as the hinges supporting the wings, formed normally by bars of extruded aluminium, are on the external side of the space where the unit is mounted and can therefore easily be tampered with, for example by withdrawing the pin, removing the connection screws or cutting the hinge eyelet.
[0003] Currently the problem of easy tampering with hinges is solved by special techniques consisting, in general, in making the hinge stronger so as to make cutting of the eyelet more difficult and, additionally or alternatively, for example, in providing an anti-withdrawal pin with intermediate enlargement or by providing connection screws which are inaccessible when the wing is in a closed condition. Other solutions involve placing inside the hinge an abutment element suitable for opposing to a traction aiming at withdrawal of the wing in a direction perpendicular to its plane, in the case wherein the pin of the hinge is cut. To obtain this result specially shaped connection screws with an elongated head or additional components such as burglar-proof guards have been proposed to use.
[0004] These solutions, although working satisfactorily, entail the need to provide on the hinge additional and/or specially shaped components, not strictly necessary for the normal functioning of the hinge yet which nevertheless increase its cost and structural complexity.
[0005] The object of the present invention is to provide a hinge for doors and windows unit which also performs a burglar-proof function without penalising its structure and its cost.
[0006] This object is achieved with the burglar-proof hinge according to the present invention comprising a first hinge element connected to the frame of the window/door, a second hinge element connected to the wing of the window/door and a pin rotatingly connecting the first and the second hinge elements to each other. At the second hinge element and on the side turned towards the exterior of the room, the frame is formed with a lip extending parallel to the median plane of the window/door. A fin extends from the second hinge element, parallel to the median plane of the window/door and suitable for abutting from the interior on the lip of the frame when the window/door is in a closed condition and for opposing to outwards traction on the wing.
[0007] The invention will now be illustrated in greater detail with the following description of one of its embodiments, given by way of a non-limiting example with reference to the accompanying drawings in which:
Figure 1 is an exploded view of the burglar-proof hinge according to the invention;
Figure 2 is a partial cross section of a door or window at the hinge according to the invention.
[0008] Referring to the aforesaid figures, 1 and 2 denote generically a first and a second hinge element and 3 a pin for connection between the two hinge elements 1 and 2 having an intermediate enlargement 3a with an annular shape. Conventionally, the hinge elements 1 and 2 are formed by a tubular portion 1a, 2a and an arm 1b, 2b extending radially from the tubular portion. In particular the arm 1b, 2b has a angled development for permitting the positioning of the arm between the frame side and the wing side.
[0009] The first hinge element 1 is connected to a frame 4 of the door/window, while the second hinge element 2 is connected to the wing 5 of the same door/window. The connection between the first hinge element 1 and the frame 4 is formed in a known manner by attaching the arm 1b, by means of screws 6, to a counterplate 7 firmly secured in a channel 8 formed along the frame 4. Similarly the second hinge element 2 is attached by its arm 2b, by means of screws 9, to a counterplate 10 firmly secured in a channel 11 formed along the edge of the wing 5.
[0010] The two channels 8 and 11 extend along corresponding edges of the frame 4 and of the wing 5 which, with the wing in a closed condition, face towards each other. The two channels 8 and 11 are delimited laterally by respective lips 8a, 8b e 11a, 11b parallel to the median plane of the wing 5 in its closed condition.
[0011] According to the invention, a fin 12 extends from the arm 2b of the second hinge element 2 which, with the wing closed, is placed in the channel 8 of the frame 4 alongside the lip 8a and at the inner side thereof. More particularly, when the wing is in the closed condition, the fin 12 abuts on a ribbing 13 projecting inwardly in the channel 8 from the lip 8a. The fin 12 is shaped in such a way that, when the wing opens, and therefore the whole structure rotates around the axis of the pin 3 of the hinge, it moves along the path 14 which is an arc of a circle pivoted on the hinge axis, thereby the fin can be completely withdrawn without causing any interference with the lip 8a.
[0012] The burglar-proof function is performed effectively because, by assuming that the pin of the hinge is sawn and an outward traction is exerted on the wing 5, in the direction of the arrow F in figure 2, it is not in any case possible to remove the wing 5 in that the fin 12 abuts on the ribbing 13 of the lip 8a of the frame 4, in fact maintaining the wing 5 locked in the frame 4.
1. Burglar-proof hinge for rotatingly connecting a wing (5) of a window/door of a room
to the respective frame (4) comprising a first hinge element (1) connected to the
frame (4) of the window/door, a second hinge element (2) connected to the wing (5)
of said window/door and a pin pivotally connecting said first and said second hinge
element to each other, said frame having a lip (8a) extending parallel to the median
plane of said window/door at said second hinge element and on the side of said frame
turned outwardly from said room, characterised in that from said second hinge element (2) a fin (12) extends parallel to the median plane
of said window/door suitable for abutting from the inside on said lip (8a) when said
door/window is in a closed condition and for opposing to any outward traction exerted
on the wing.
2. Hinge according to claim 1, wherein along two opposite edges, when the wing is closed,
of said frame (4) and said wing (5) respective channels (8,11) are formed and counterplates
(7,10) are fixedly secured to said channels for the attachment of said first and said
second hinge elements (1,2), said second hinge element (2) having a radial arm (2b)
via which it is attached to said channel (11) formed on said wing (5), an abutment
fin (12) extending from said radial arm (2b) in the channel (8) formed along the edge
of said frame (4) alongside said lip (8a) sidewise delimiting said channel (8) on
the side turning outwardly from said room.
3. Hinge according to claims 1 or 2, wherein a ribbing (13) projects inwardly from said
lip (8a), said abutment (12) fin abutting against said ribbing (13) when the wing
(5) is in its closed position.