EP1887173A2

EP1887173A2 - Closure terminal for cremone bolt of a door or window

Info

Publication number: EP1887173A2
Application number: EP07112739A
Authority: EP
Inventors: Antonio Alban
Original assignee: Alban Giacomo SpA
Current assignee: Alban Giacomo SpA
Priority date: 2006-08-04
Filing date: 2007-07-19
Publication date: 2008-02-13
Anticipated expiration: 2027-07-19
Also published as: ATE480686T1; DE602007008999D1; ITPD20060300A1; EP1887173B1; EP1887173A3

Abstract

A closure terminal (10) for a cremone bolt of a door or window, comprising a pawl (19) which is adapted to be arranged in the locking seat (S) formed on the closure abutment jamb (B) of the door or window. The pawl (19) is rigidly coupled by means of a threaded coupling to an intermediate body (20), which is associated with the movable rod (13) of the cremone bolt (11) to be arranged on the leaf of the door or window. The threaded coupling allows the adjustment of the position of the pawl (19) on the axis of the thread. The pawl (19) is further eccentric with respect to the axis. The intermediate body (20) consists of a bush (21) which is fixed to the movable rod (13) of the cremone bolt and is at least partially threaded internally and in which a threaded stem (22) which protrudes from the pawl (19) is inserted and coupled.

Description

The present invention relates to a closure terminal for a cremone bolt of a door or window.
As is known, the leaf of a door or window is closed and opened by means of a handle which is connected to a closure terminal by means of a so-called cremone bolt.
A cremone bolt comprises a flat fixed rod, which is fixed to the side of the leaf; the fixed rod acts as a guide for a movable rod which is arranged between the frame of the leaf and the fixed rod.
One (or more) closure pawls protrude from the movable rod toward the outside of the leaf through a corresponding slot formed in the fixed rod; such pawl, depending on the position of the movable rod on the fixed rod, is made to perform a translational motion so as to enter and exit from a corresponding locking seat which is formed on the closure abutment jamb of the frame of the door or window or is free to exit from the locking seat.
Depending on the type of door or window and on the accuracy of the assembly of a door or window, the distance (clearance) between the leaf and the abutment jamb can vary from one installation to another; it is therefore necessary to be able to adjust the distance of the pawl from the movable rod in order to allow the pawl to enter adequately the locking seat formed in the abutment jamb.
To do this, one solution is to provide a closure terminal which is constituted by a pawl which has a threaded through hole for mating with an externally threaded pin which protrudes from the movable rod of the cremone bolt.
In this manner, the position of the pawl can be adjusted on the axis of the pin in the direction of the locking seat.
Such a solution is shown for example in EP-0870890 .
In such patent, the pawl is eccentric with respect to the axis of the threaded coupling between the pin and the pawl.
In this manner, it is possible to adjust not only the axial distance but also the "lateral" position of the pawl, arranging it so that it rests against the side of the locking seat; in this manner, the pawl is prevented from being "loose" within the locking seat (the seat, in order to ensure the insertion of the pawl, is in fact larger than said pawl).
Although this solution is extremely valid in the concept of axial and "lateral" adjustment of the pawl, it has limitations during production and installation which are linked to the particular geometry chosen.
The aim of the present invention is to provide a closure terminal for a cremone bolt of a door or window which allows an axial and "lateral" adjustment of the pawl with respect to the locking seat and at the same time is constructively simple.
Within this aim, an object of the present invention is to provide a closure terminal for a cremone bolt of a door or window which can be installed easily.
Another object of the present invention is to provide a closure terminal for a cremone bolt of a door or window which is tough.
Another object of the present invention is to provide a closure terminal for a cremone bolt of a door or window which can be manufactured with known systems and technologies.
This aim and these and other objects, which will become better apparent hereinafter, are achieved by a closure terminal for a cremone bolt of a door or window, which comprises a pawl which is adapted to be arranged in the locking seat formed on the closure abutment jamb of the door or window, said pawl being rigidly coupled by means of a threaded coupling to an intermediate body which is associated with the movable rod of the cremone bolt to be arranged on the leaf of the door or window, said threaded coupling being adapted to allow the adjustment of the position of the pawl on the axis of the thread, said pawl being eccentric with respect to said axis, characterized in that said intermediate body consists of a bush which is fixed to the movable rod of the cremone bolt and is at least partially threaded internally and in which a threaded stem which protrudes monolithically from said pawl is inserted and coupled.
Further characteristics and advantages of the invention will become better apparent from the following detailed description of a preferred but not exclusive embodiment thereof, illustrated by way of non-limiting example in the accompanying drawings, wherein:

Figure 1 is a longitudinal sectional view of a portion of a cremone bolt with a closure terminal according to the invention applied thereto;
Figure 2 is a transverse sectional view of the cremone bolt of Figure 1, taken at the closure terminal;
Figure 3 is a longitudinal sectional view of a closure terminal according to the invention, applied to a portion of a cremone bolt which is a variation with respect to the one of the preceding figures.

It is noted that anything found to be already known during the patenting process is understood not to be claimed and to be the subject of a disclaimer.
With reference to the figures, a closure terminal according to the invention is generally designated by the reference numeral 10.
The closure terminal 10 is applied to a cremone bolt 11, of which the figures show a fixed rod 12, which is locked on a frame T of the leaf and a movable rod 13, which is arranged so as to be guided on the fixed rod 12, according to a layout which is per se of a known type.
The fixed rod 12 closes a slot 14, which is formed on the frame of the leaf and contains the cremone bolt.
The movable rod 13, arranged in the slot 14, is composed, according to a per se known structure, by a longitudinal plate 15, on which the closure terminal 10 is fixed, and by a flexible curved elongated body 16, which is fixed to the plate 15 by means of a rivet 17; the flexible elongated body 16 is arranged between the plate 15 and the fixed rod 12.
The closure terminal 10 protrudes from the slot 14 toward an abutment frame B of the door or window by means of a through slot 18 provided in the fixed rod 12; the through slot 18 also acts as a longitudinal guide for the terminal 10.
The closure terminal 10 comprises a pawl 19 which, when closed, is inserted in a locking seat S formed in the abutment frame B of the door or window.
The pawl 19 is rigidly coupled by means of a threaded coupling to an intermediate body 20 which is associated with the movable rod 13 of the cremone bolt.
In particular, the intermediate body 20 consists of a bush 21, which is fixed to the movable rod 13 and is partially threaded internally; the axis of the bush and of the thread coincide and protrude toward the abutment frame B of the door or window.
A threaded stem 22 is inserted and coupled in the bush 21 and protrudes monolithically from the pawl 19.
The pawl 19 is eccentric with respect to the axis of the threaded stem 22.
The bush 21 is arranged so as to pass through the plate 15 and the elongated body 16.
In particular, the bush 21 is inserted with a rotation-preventing coupling in a complementary through hole 23 formed in the plate 15 of the movable rod 13.
For example, both the bush portion 21 surrounded by the wall of the through hole 23 and the bush portion surrounded by the walls of the slot 18 have a rectangular contour.
The end faces of the bush 21 protrude in a radial direction, thus forming two extraction-preventing shoulders, respectively a first extraction-preventing shoulder 24, which abuts against the edges 25 of the slot 18 directed toward the pawl 19, and a second shoulder 26, which abuts against the face 27 of the plate 15 which lies opposite the fixed rod 12.
The extraction-preventing shoulders prevent the axial movement of the bush 21; the first shoulder 24 further helps to guide the bush 21 on the fixed rod 12.
As can be seen in Figure 1, at the rim of the through hole 23 there is a third shoulder 28, which abuts against the face of the plate 15 that lies opposite the face 27 against which the second shoulder 26 abuts.
From a practical standpoint, the second shoulder 26 is formed by plastic deformation during assembly of the closure terminal: the bush 21 is inserted in the slot 18 and in the through hole 23 from the side related to the fixed rod 12; when the first shoulder 24 abuts against the edges 25 of the slot 18 and the third shoulder 28 abuts against the plate 15, the base of the bush 21 protrudes from the hole 23 and is expanded by deformation in a known manner, thus creating the second shoulder 26.
Once the bush 21 has been locked, the threaded stem 22, which protrudes from the pawl 19, is inserted therein.
The distance of the pawl 19 from the fixed rod 12 (and therefore the distance from the locking seat 20) depends on how far the stem 22 is inserted in the bush 23.
Advantageously, the thread of the stem 22 is enlarged with respect to the internal thread of the bush 21, thus allowing a "friction" coupling which allows to adjust adequately, without the risk of unwanted movements, the axial position of the pawl 19 with respect to the bush 23.
Further, once the chosen axial position has been found (as well as the "lateral" adjustment of the pawl: a rotation of the stem is matched by a rotation of the eccentric part of the pawl), the stem 22 is deformed plastically at the end in order to lock it in the bush 23.
For example, deformation occurs by punching with a punch the end face 29 of the stem 22, which thus tends to expand, pushing against the walls of the bush 23.
Figure 3 illustrates a structure of a bolt closure terminal in which, between the first shoulder 24 and the second shoulder 26, there is respectively the fixed rod 12, the movable rod 13 composed only of the plate 15, and a shim ring 30, which is useful to prevent axial movements of the bush 23.
In practice it has been found that the invention thus described achieves the intended aim and objects.
In particular, the present invention provides a closure terminal for a cremone bolt of a door or window which allows axial and "lateral" adjustment of the closure pawl which are extremely easy to perform.
The particular structure of the closure terminal allows its simplified manufacture and its very quick, safe and strong assembly fitting to the bolt; in this regard, attention is called to the ease with which it is possible to deform the end of the stem of the pawl in order to lock it in the bush.
The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims; all the details may further be replaced with other technically equivalent elements.
In practice, the materials employed, so long as they are compatible with the specific use, as well as the dimensions, may be any according to the requirements and the state of the art.
The disclosures in Italian Patent Application No. PD2006A000300 from which this application claims priority are incorporated herein by reference.
Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.

Claims

A closure terminal for a cremone bolt of a door or window, comprising a pawl (19) which is adapted to be arranged in the locking seat (S) formed on the closure abutment jamb (B) of the door or window, said pawl (19) being rigidly coupled by means of a threaded coupling to an intermediate body (20), which is associated with the movable rod (13) of the cremone bolt (11) to be arranged on the leaf of the door or window, said threaded coupling being adapted to allow the adjustment of the position of said pawl (19) on the axis of the thread, said pawl (19) being eccentric with respect to said axis, characterized in that said intermediate body (20) consists of a bush (21) which is fixed to the movable rod (13) of the cremone bolt and is at least partially threaded internally and in which a threaded stem (22) which protrudes monolithic ally from said pawl (19) is inserted and coupled.
The closure terminal according to claim 1, characterized in that said bush (21) is inserted with a rotation-preventing coupling in a complementary through hole (23) provided in a part of said movable rod (13).
The closure terminal according to the preceding claims, characterized in that at least the portion of said bush (21) that is surrounded by the wall of said through hole (23) has a quadrangular contour.
The closure terminal according to one or more of the preceding claims, characterized in that the end faces of said bush (21) protrude radially with respect to the axis of said bush (21), forming two extraction-preventing shoulders, respectively a first extraction-preventing shoulder (24), which abuts against the edges (25) of a through slot (18) formed in the fixed rod (12) of the bolt (11) which are directed toward said pawl (19), and a second shoulder (26), which abuts against the face (27) of the part of said movable rod (13) that lies opposite said fixed rod (12), said extraction-preventing shoulders (24, 26) preventing the axial movement of said bush (21).
The closure terminal according to the preceding claims, characterized in that a third shoulder (28) is provided at the rim of said through hole (23) and abuts against the face of the part of the movable rod (13) which lies opposite said face (27) against which said second shoulder (26) abuts, said second shoulder being obtained by plastic deformation after the insertion of said bush in said through hole (23).
The closure terminal according to claim 4, characterized in that between said first shoulder (24) and said second shoulder (26) there are the fixed rod (12) and the superimposed parts of the movable rod (13) constituted by a longitudinal plate (15) and a flexible elongated body (16) which is fixed to said plate (15), said through hole (23) being provided in said plate (15).
The closure terminal according to claim 4, characterized in that the fixed rod (12), the movable rod (13) and a shim ring (30) are arranged between said first shoulder (24) and said second shoulder (26).
The closure terminal according to one or more of the preceding claims, characterized in that the thread of said stem (22) is larger than the internal thread of said bush (21), constituting a threaded friction coupling.
The closure terminal according to one or more of the preceding claims, characterized in that the end face (29) of the stem (22) is widened by plastic deformation provided during the assembly of the closure terminal once said pawl (19) has been positioned correctly.