EP2374980A1

EP2374980A1 - Door and window frame connecting device

Info

Publication number: EP2374980A1
Application number: EP20110161511
Authority: EP
Inventors: Roberto Radaelli
Original assignee: Radaelli Angelo Sas Di Renata Vagni Radaelli & C
Current assignee: Radaelli Angelo Srl
Priority date: 2010-04-12
Filing date: 2011-04-07
Publication date: 2011-10-12
Anticipated expiration: 2031-04-07
Also published as: ITMI20100612A1; EP2374980B1; IT1399374B1

Abstract

A connection device (1), particularly for door and window frames, comprises mortise means (2) formed on a head (3) of a first element (4), and tenon means (5) formed on the head (6) of a second element (7) to be associated with the first element (4), said mortise (2) and tenon (5) means having a substantially T-shape. The mortise (2) and tenon (5) means comprise each a respective stem (23,53) and a first wing (21,51) merging with a second wing (22,52), the first wing (21,51) having an extension slightly larger than that of the second wing (22,52), both the wings extending in a cascade relationship substantially along a same middle line, and both said wings being fitted to the central stem by respective curved surfaces.

Description

BACKGROUND OF THE INVENTION

The present invention relates to a connection device, particularly for door and window frames.
As is known, window, door, window-door frames and the like are conventionally made either of a wood material or of steel or aluminium and alloys thereof, in normal or contoured section members, or also of a plastics material.
The elements constituting the movable part of a window or door frame are butt connected to one another thereby defining an angle of 90° therebetween.
The most conventionally used connecting system, mainly as the door and window frames are constituted by wood sections, is the so-called tenon and mortise connection system, in which a mortise, constituted by a recess formed at an end portion of an element, engages therein a tenon, or male element, formed on the other portion to be connected.

SUMMARY OF THE INVENTION

The aim of the present invention is to provide a tenon and mortise connection system, particularly suitable for making door and window frames, which is much more strong and reliable than conventional door and window frame connecting systems.
Within the scope of the above mentioned aim, a main object of the invention is to provide such a connecting device which may be made by already existing processing machines.
Another object of the present invention is to provide such a connecting device, which owing to its specifically designed constructional features, is very reliable and safe in operation.
According to one aspect of the present invention, the above mentioned aim and objects, as well as yet other objects, which will become more apparent hereinafter, are achieved by a connecting device for door and window frames, characterized in that said connecting device comprises mortise means formed on a head portion of a first element, and tenon means formed on a head portion of a second element to be associated with said first element, said mortise and tenon means having a substantially T shape.
Each said mortise and tenon means comprise a stem and a first wing merging with a second wing, said first wing having an extension slightly larger than that of said second wing, both said wings extending in succession with one another substantially along a same middleline.
Both said wings are merged or fitted to said central stem through respective curved surfaces.

BRIEF DESCRIPTION OF THE DRAWINGS

Further characteristics and advantages of the present invention will become more apparent hereinafter from the following detailed disclosure of a preferred, though not exclusive, embodiment of the invention which is illustrated, by way of an indicative, but not limitative, example in the accompanying drawings, where:

Figure 1 is a perspective view showing the end portions of two elements to be connected, including the connecting device according to the present invention;
Figure 2 is a partially longitudinally cross-sectioned front view showing the two elements to be connected of figure 1, in a separated position;
Figure 3 is a partially longitudinally cross-sectioned front view showing the two elements to be connected of figure 2, in a connected position;
Figure 4 is yet another front view showing the two elements to be connected of figure 3, in a separated position;
Figure 5 is a front view, similar to figure 4, but showing the two elements to be connected of figure 3, in a connected or joined position;
and
Figure 6 is a front view of a window or door frame made by using the connecting device according to the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

With reference to the number references of the above mentioned figures, the connecting device according to the present invention, which has been generally indicated by the reference number 1, comprises a mortise 2, formed on a head 3 of a first element 4, and a tenon 5, formed on the head 6 of a second element 7 to be associated with the first element 4.
According to the present invention, said mortise 2 and tenon 5 are correspondingly contoured as to define a substantially T shape configuration.
More specifically, the mortise 2 comprises a stem 23 and a first wing 21 merging with a second wing 22.
The first wing 21 has an extension slightly larger than that of the second wing 22, both said wings extending in a cascade relationship substantially along the same middleline.
In particular, the first wing 21 is merged or fitted to the stem 23 through a first bend 24, whereas the second wing 22 is fitted to the stem 23 through a second bend 25.
Correspondingly, the tenon 5 comprises a tenon stem 53 and a first tenon wing 51 merging or fitting with a second tenon wing 52.
The first tenon wing 51 has an extension slightly larger than that of the second tenon wing 52; both said tenon wings extending in a cascade relationship substantially along the same middleline.
The first wing 51 is fitted to the stem 53 through a first bend 54, whereas the second wing 52 is fitted to the stem 53 through a second bend 55.
The wings 21, 22 and 51, 52 respectively of the mortise 2 and tenon 5 substantially extend along that portion which may be called the bottom or base portion 10 of the contoured element 4 and 7.
Said contoured element has a complex configuration, the components of which substantially comprise a main longitudinal body 11 associated with the base body 10.
The stem 23, 53 of the mortise and tenon extends at said main longitudinal body 11,
The T-shape of the mortise 2 and corresponding tenon 5 provides a perfect restraining between the two elements 4 and 7, even in the presence of comparatively high efforts, with respect to conventional rectilinear tenon and mortise connection systems.
The fitting by bends between the wings and stem, both of the tenon 5 and the mortise 2, in addition to facilitating the making of these elements, facilitates a proper distribution of the shear stress, thereby providing an improved connection mechanical strength.
It has been found that the invention fully achieves the intended aim and objects.
In fact, the invention has provided a connection device, of a tenon and mortise type, particularly suitable for coupling constructional elements of a door or window frame, which connecting device is both operatively and constructionally improved with respect to conventional connecting systems and which, moreover, may be made in an advantageous manner from the economic and constructional standpoint.
In practicing the invention, the used materials, as well as the contingent size and shapes, can be any, according to requirements.

Claims

A connecting device for door and window frames, characterized in that said connecting device comprises mortise means formed on a head portion of a first element, and tenon means formed on a head portion of a second element to be associated with said first element, said mortise and tenon means having a substantially T shape.
A connecting device, according to claim 1, characterized in that each said mortise and tenon means comprise a stem and a first wing merging with a second wing, said first wing having an extension slightly larger than that of said second wing, both said wings extending in succession with one another substantially along a same middleline.
A connecting device, according to claim 2, characterized in that said first wing is merged or fitted to said stem through a first bend, and said second wing is fitted or merged to said stem through a second bend.
A connecting device, according to claim 1, characterized in that said wings of respectively said mortise and tenon means substantially extend at a base portion of an element to be connected, said stem extending along a longitudinal main body of said element to be connected.