WO2002075087A1

WO2002075087A1 - Bolt for windows

Info

Publication number: WO2002075087A1
Application number: PCT/IT2002/000165
Authority: WO
Inventors: Ugo Avvanzini
Original assignee: Erreti S.R.L.
Priority date: 2001-03-20
Filing date: 2002-03-19
Publication date: 2002-09-26
Also published as: DE20220675U1; ITRN20010023A0; ITRN20010023A1

Abstract

Bolt (1) for fixtures, the bolt (1) comprising a hinged mechanism (18) designed to actuate a bar (16) from and towards a respective extracted position; the hinged mechanism (18) comprising an actuating lever (19) connected to the bar (16) by the arrangement, in between, of an arm (21) hinged with the bar (16) and with the lever 19); the arm (21) has a central body (36) delimited by a first and by a second longitudinal end (37, 38); the central body (36) being substantially flat and thin and arranged in substantial contact with a seat (14) for sliding of the bar (16) and, at the same time, is designed to delimit below the portion of an opening (51) delimited above by the lever (19), when the same lever (19) is in the respective closed position, so as to leave one free end (27) of the same lever (19) freely accessible from below.

Description

BOLT FOR WINDOWS

Description Technical field

The present invention relates to a bolt for fixtures, provided with at least one fixed frame and a closure member, which bolt can be effectively installed on the side of the closure member for relative locking to the fixed frame. Background art

In the sector of fixtures which can be opened in leaf and tilting fashion, the fixed frame supports the openable leaf via a set of accessories, which can be actuated via a handle which is usually installed on a side of the leaf itself. The set of accessories also comprises a pair of hinges mounted on the fixed frame on the opposite side to the handle for leaf-type opening, in addition to a device for limiting the slant of the leaf during tilting-type opening, which in turn also comprises a kinematic chain which actuates selective movement of a push-rod from and towards a position of engagement with the bottom side of the fixed frame.

In this sector bolts are known which comprise a bar, or push-rod, and a hinged mechanism which enables the same bar to be actuated from and towards a position of engag ent with a seat formed in the fixed frame. The hinged mechanism comprises a lever which is connected to the bar via an intermediate arm and can be actuated manually. Examples of this mechanism can be found in utility model No. 219580 and in patents for industrial invention Nos. 1,252,932 and 1,258,498. It should be noted that, so as to facilitate use of the mechanism and reduce the forces to be applied for respective actuation, the arm is hinged with the lever in the middle and therefore, when the bar is in the respective extracted configuration, the free end of the lever overlaps at least partially the upper end of the arm.

It should be noted that the bolt described in patent no. 1252932 comprises a box-like body which houses the bar and the hinged mechanism. Actuation of the hinged mechanism, starting from the configuration where the bar is extracted and therefore with the leaf locked in a closed position, is made possible once the actuating lever has been raised from its lowered position up to the point where it can be grasped manually. In order to do this, the box-like body, lever and arm have to be shaped appropriately. With particular reference to patent No. 1,252,932, this result is obtained by providing the arm portion lying below the free end of the lever with a fork configuration. Owing to this fork configuration, the arm engages only laterally with the opening inside the box-like body and leaves the volume below the lever free, which can easily be engaged by the aforesaid pointed implement or by the phalanx of a finger.

This fork configuration is obtained in practice by making the arm in the form of two pressed sheet metal parts, each of which is substantially S-shaped. Although on the one hand this method of execution facilitates opening of the bolt, on the other hand it has the disadvantage of complicating the bolt manufacturing stage, whether the arm is composed during assembly, leaving two S-shaped elements simply adjacent, or whether these S-shaped elements are made integral one with the other by welding or another method of rigid connection. On the other hand this solution complicates the assembly stage and, in particular, requires an excessive length of time for assembly of the arm itself and has a negative effect on the costs of the solution, which therefore can be improved. Disclosure of the invention

The object of the present invention is to provide a bolt for fixtures which does not have the disadvantages described above, which leaves the space below the free end of the lever substantially free when the bar is placed in the respective extracted position, and which simplifies the operations of assembly, is strong and economically advantageous .

According to the present invention a bolt for fixtures is provided, the characteristic features thereof being defined in Claim 1 below. Brief description of the drawings

The invention will now be described with reference to the accompanying drawings which illustrate some non- limiting examples of embodiment thereof and in which:

- Figure 1 is a schematic, perspective view of a first preferred embodiment of a bolt according to the present invention;

- Figure 2 is a perspective view of Figure 1 in which a protection cover is shown as raised from the rest of Figure 1;

- Figure 3 is a perspective view, with parts removed for the sake of clarity, of a second preferred embodiment of the present invention; and

- Figure 4 is an exploded view, on a smaller scale, of Figure 1.

Detailed description of the preferred embodiment (s)

1 in Figure 1 denotes, as a whole, a bolt for fixtures which can be effectively installed on a side 10 of a closure member for doors or for windows. For the sake of convenience, it was decided in the following description to describe this closure member in the form of a leaf 11 visible only in part in Figures 1 and 3, without thereby undermining the general nature of the same description. Therefore the bolt 1 is designed to keep the same leaf 11 locked in the position of closure of a known and not illustrated fixed frame of a known and not illustrated window. Referring to the leaf 11, it was decided not to specify whether this is a passive leaf or a leaf which can be opened in leaf and/or tilting fashion, in that this is irrelevant for the purposes of illustrating the feasibility of the present invention.

With particular reference to Figure 2, the bolt 1 is provided with a frame 15 which can be connected in a rigid and selectively unfastenable manner to the leaf 11, for example via threaded connections 12. The frame 15 is provided with a longitudinal prismatic seat 14 engaged in a freely sliding manner by a locking bar 16. The frame 15 can be made in the form of a single part or two parts (Figures 2 and 3) , as in Figure 1, without thereby undermining the general nature of the present description, the decision to divide the frame 15 and the seat 14 respectively into two parts 15' and 15' ' and into two parts 14' and 14'' being aimed solely at limiting the overall mass of the bolt 1, without thereby altering the functional features of the same bolt 1.

For the sake of convenience of illustration and in order to simplify drafting of the following description, the leaves and the fixed frames of fixtures are considered known, as are therefore also the seats which the fixed frames have below the vertices of openable leaves provided with bolts such as the bolt 1. As is known, these seats are designed to house the free ends of the locking bars similar to the bar 16.

The bar has a bottom free end 17, designed to engage a seat (known and not illustrated) formed in a frame of a window (known and not illustrated) , by the thrusting action of a hinged actuating mechanism 18. This mechanism 18 comprises a lever 19 which is hinged with the frame 15 above the top end 20 of the bar 16 via a hinge 28 having a pivoting axis 29 which is transverse to a longitudinal axis 24 of the bar 16. The lever 19 is connected to the top end 20 of the same bar 16 by the arrangement, in between, of an arm 21, which is hinged with the bar 16 via an upper hinge 22, a pivoting axis 23 is parallel to the axis 29. This arm 21 is also hinged to the lever 19 via a second hinge 25, a pivoting axis 26 is parallel to the axis 23. The hinge 25 is located in the middle in relation to the lever 19, in such a way that the lever 19 has a free end 27 which can be used for manual actuation of the same, and therefore for actuating the movement of the bar 16 from and towards an extracted position, which can be seen in Figure 3 alone. When the bar 16 is in this position, which from this point onwards will be indicated simply as extracted position, the end 17 is designed to engage with a seat (known and not illustrated) formed below the leaf 11 in a fixed frame (known and not illustrated) of a window (known and not illustrated window) , which may be made of metal, plastic or wooden material.

The lever 16 is hinged with the upper portion 15' of the frame 15 via a hinge 28, which has an axis 29 parallel to the axes 26 and 23. The portion 15' is traversed on the opposite side of the end 20 in relation to the axis 29 by a seat 30 which extends the seat 14 above the axis 29. This seat 30 is designed to house the end 27 of the lever 19, in such a way that the same lever 19 can be rotated freely through 180° between a position where it covers the end 20 of the bar 16 (which can be seen in Figure 3), occurring when the same bar 16 is placed in the respective extracted position of Figure 3, and a retracted position (known and not illustrated) , which is determined by rotating the bar 19 of Figure 2 clockwise, until the same lever 19 is brought substantially parallel to the axis 24 of the bar 16. It should be noted that the upper portion 14' of the seat 14 terminates below the axis 29 in two projections 32, which are located at a distance from the same axis 29 which is roughly the sum of the length L of the arm 21 and the interaxial distance I between the axes 29 and 26 of the lever 19. The frame 15 also has a lowered zone located between the projections 32 and the axis 29, delimited above by a surface 33.

With particular reference to Figure 4, the arm 21 comprises a single bar 35 which has a central body 36 delimited by respective longitudinal top 37 and bottom ends 38. The central body 36 is substantially flat and thin and is positioned below the axis 29 of the hinge 28, and therefore in substantial contact with the surface 33, when the bar 16 is arranged in the respective extracted position. At least one of the longitudinal ends 37 and 38, and in the case in question both ends, has/have a thickness substantially identical to the thickness of the central body 36 and is rotated through 90° in relation to the same body 36. Each end 37 and 38, finally, is connected to the central body 36 via a connection portion 39 (Figure 4) which can be obtained by bending or pressing.

The bolt 1 comprises a box-like covering member or cover 50, which is designed to delimit laterally and above an opening 51 inside which the mechanism 18, the bar 16 and the frame 15 are contained. In particular the cover 50 is shaped pris atically on the basis of a section with a substantially C-shaped profile, and is provided with an opening 52 which has a longitudinal extension greater than the longitudinal extension of the lever 19, so as to leave the end 27 accessible from below through a lower portion 53 of the same opening 52. The cover 50 is also delimited externally by a surface 54 which is cut by the opening 52, and which has a cross-section which is substantially C- shaped.

It should be noted that when, during use, the bar 16 is in the extracted position, the portion 53 is facing the surface 33 and the central body 36 is arranged between the surface 33 and the opening 52.

Referring to Figure 4, the lever 19 has a housing 61 for at least the upper end 37 of the arm 21, and each of the longitudinal ends 37 and 38 has a first and a second housing hole 62 and 63, each of which is designed to house a pin 64 of the hinges 22 and 25. The holes 62 and 63 are formed above the central body 36 with sufficient length to allow the lever 19, when during use the bar 16 is in the respective extracted position, to contain the end 37 inside the respective housing 61 and have a respective external surface 66 arranged substantially flush with the surface 54.

The use of the bolt 1 can be easily understood from what is described above and does not require further explanations. Nevertheless, again with reference to Figure 3, it should be pointed out that, when the bar 16 is in the respective extracted position, the end 27 of the lever 19 can be accessed from below by engaging the phalanx of a finger or pointed implement in the portion 53 of the opening 52, so as to make the lever 19 in Figures 2 and 3 rotate clockwise, with the intent of switching the bolt 1 from the extracted position of the bar 16 to the retracted position of the bar 16 mentioned above. For the sake of completeness it is pointed out that this retracted position, known and not illustrated, is achieved following rotation through 180° of the lever 19 clockwise in Figure 2, the result thereof being t.o translate the bar 16 inside the seat 14 along the axis 24 via the arm 21. At the end of the rotation, the end 17 of the bar 16 is contained inside the lower part 15' ' of the frame 15, and the bar 16, arm 21 and lever 19 are aligned with each other along the axis 24.

At this point it is easy to understand that the decision to shape the arm 21 in the manner described above enables bolts to be provided with a hinged mechanism which is decidedly simpler and has a smaller number of mechanical members which are simple to produce and assemble and are shaped so as to leave the opening 51 completely accessible, therefore without hindering insertion of the phalanx of a user's finger through the lower portion 53 of the opening 52 so as to switch the same bar 16 from the extracted position to the retracted position.

In particular the decision to make the arm in the form of a flat bar with the perforated ends bent through 90° results in a minimum thickness of the bolt 1, the use of a minimum quantity of material and hence an increase in the strength of the product as a whole, as well as the cost- effectiveness thereof, solving the technical problem originally proposed.

Finally, it is clear that modifications and variations can be made to the bolt' for fixtures described and illustrated here without thereby departing from the scope of protection of the present invention.

For example, with reference to Figure 3, the cover 50 of the bolt 1 has been replaced by a cover 70, which is different from the same cover 50 so as to allow mounting on leaves of windows through the assembly of sections 71 which are obtained by extrusion and one of which can be seen in Figure 3. This section 71, which defines the side 72 of the leaf 11, is provided with longitudinal ribs 73, and the cover 70 has longitudinal recesses 74 designed to mate with the ribs 73 in such a way that the bolt 1 can be installed by means of a prismatic coupling system. The bolt 1, thus modified, is locked in position via an unfastenable connection, for example, but not limitedly, via a threaded connection, and in particular via a grub screw 75. It should be noted that the longitudinal recesses 74 are illustrated by a broken line in Figure 3 since they are substantially concealed by the ribs 73.

Claims

Claims 1. Bolt (1) for fixtures, the bolt comprising a frame which can be fixed laterally to a leaf (11) of a fixture and provided with a sliding seat (14) for a closing bar (16) and a hinged mechanism (18) designed to actuate said bar (16) from and towards a respective extracted position for closure of said leaf (11) ; said hinged mechanism (18) comprising in turn an actuating lever (19) hinged with the frame (15) above said bar (16) and connected to said bar (16) by interposing an arm (21) ; said lever (19) and bar (16) being coupled to said arm (21) via respective first and second rotational pairs (25, 22) which are parallel to each other, transverse to said bar (16) and associated with said arm (21) in an end position; said first rotational pair (25) being associated with said lever (19) in an intermediate position, in such a way that said lever (19) has a third free end (27) which can be used for respective manual actuation; a covering member (50, 70) being envisaged for delimiting laterally and above an opening (51) containing said mechanism and said bar (16) ; said covering member (50, 70) being provided with an opening (52) which has a longitudinal extension greater than the longitudinal extension of said lever (19), so as to leave said third end (27) accessible from below; characterized in that said arm (21) comprises a bar (16) having a central body (36) delimited by a first and a second longitudinal end (37, 38) oriented in a specific manner; said central body (36) being substantially flat and slim and arranged below axes (26, 23) of said first and second rotational pairs (25, 22) , in such a way that, during use, said central body (36) is designed to be positioned substantially in contact with said sliding seat

(14) in a position facing said opening (52) , so as to delimit below the portion of said opening (51) underneath said lever (19) when the same lever (19) is in the respective closed position and also leave said third end

(27) inside said closure member (50, 70) freely accessible.

2. Bolt according to Claim 1, characterized in that said arm (21) comprises solely said bar (16) .

3. Bolt according to at least one of Claims 1 or 2, characterized in that at least one of said first and second longitudinal ends (37, 38) has a thickness substantially identical to the central body (36), is rotated through 90° in relation to the same central body (36) and is connected to the latter via a connecting portion (39) which can be obtained by bending or pressing.

4. Bolt according to Claim 3, characterised in that said lever (19) has a housing (61) for at least one of said first and second longitudinal ends (37, 38) of said arm (21); said first and second longitudinal ends (37, 38) having respective housing holes (62, 63), each designed to house a pin (64, 64) of said first and second rotational pairs (25, 22) ; said holes (62, 63) being formed above said central body (36) with sufficient length to allow, during use, said lever (19) , when said bar (16) is arranged in the respective extracted position, to contain said first longitudinal end (37) inside the respective housing (61), and, simultaneously, have a respective first external surface (66) arranged substantially flush with a second external surface (54) of said covering member (50, 70) .

5. Bolt according to any one of the previous claims, characterised in that threaded members (12) (75) are envisaged for fixing said frame (15) to said leaf (11) .

6. Bolt according to any one of the previous claims, characterized in that said covering member (70) has longitudinal recesses (74) shaped so as to match the ribs (73) presented by said leaf (11) on respective sides (72) and designed to allow installation of said frame (15) on said leaf (11) by means of a prismatic coupling system, which can be locked in position via an unfastenable connection (75) .

7. Bolt for fixtures, as described and illustrated with reference to the accompanying drawings.