EP0795672A1

EP0795672A1 - A complex of a section bar and of a sealing strip for door and window frames and a sealing strip for a section bar for door and window frames

Info

Publication number: EP0795672A1
Application number: EP97200660A
Authority: EP
Inventors: Edoardo Zanoni
Original assignee: Hydro Aluminium Systems SpA
Current assignee: Hydro Building Systems SpA
Priority date: 1996-03-14
Filing date: 1997-03-05
Publication date: 1997-09-17
Also published as: HRP970140A2; ITMI960490A1; BG62577B1; AR006207A1; YU9897A; IL120431A0; PL318925A1; IT1283242B1; ZA972106B; BG101286A; TR199700186A1; HU9700586D0; BR9701286A; HUP9700586A1; ITMI960490A0

Abstract

A complex of a section bar (1; 100) and of a sealing strip (33; 133; 233; 333; 433; 533; 633) comprising a tubular casing provided with two lateral walls (3, 4) and with two end walls (5, 6), wherein one of the lateral walls (3) is provided with a tang (24; 124; 224; 324; 424; 524; 624) capable of supporting the sealing strip (33; 133; 233; 333; 433; 533; 633); the sealing strip (33; 133; 233; 333; 433; 533; 633) is provided with a partially elastic channel-shaped connecting element (38; 138; 238; 338; 438; 538; 638), snap-engageable with the supporting tang (24; 124; 224; 324; 424; 524; 624).

Description

The present invention relates to a complex of a section bar and of a sealing strip for door and window frames and a sealing strip for a section bar for door and window frames.
It is known that metal section bars of aluminum alloy are used to build door and window frames of various types, such as windows, doors and such like. The door and window frames include fixed parts and movable parts that in a number of cases are made using pairs of section bars having the same or a slightly different shape.
The patent EP-B1-0541612 filed in the name of the same Applicant describes a metal section bar for door and window frames comprising a tubular casing having a substantially polygonal cross-section, provided with two lateral walls and with two end walls, one inner and one outer. The lateral walls have rectilinear and parallel central portions and inclined terminal portions. The lateral walls, in turn, are provided with pairs of inverted L-shaped folded-down tangs that form C-shaped seats capable of housing connecting organs for parts of hinges to be associated with the section bars. The inverted L-shaped folded-down tangs are provided with reliefs protruding laterally. From the end walls there extend abutment fins provided with pairs of inverted L-shaped folded-down tangs that form C-shaped seats capable of housing sealing strips.
The inclined terminal portions of the lateral walls join up with the abutment fins to form collection and drainage chambers for seepage and condensation water. In the abutment fins there are obtained drainage holes that cause the water collected in the chambers to downflow toward the outside.
In order to build a door and window frame it is possible to use two section bars that are alike, having the described shape, one for the fixed part, the other for the movable part so as to make a connection of the traditional type wherein sealing strips, in turn of the traditional type, are housed in the C-shaped seats of the abutment fins of the section bars and operate between the two section bars by compression.
But, by using a section bar having the shape described and another having a slightly different shape and provided with a lateral wall that has an abutment fin as well, it is possible to make a so-called open-joint connection wherein a projecting (floating) sealing strip is placed on the fixed part of the door and window frame. The sealing strip, having a substantially triangular cross-section, is connected to an inverted L-shaped folded-down tang and to the respective relief protruding laterally of a lateral wall of the fixed section bar. In this way one edge of the sealing strip adheres to the inclined terminal portion, covering it, and another edge thereof remains in contact with an abutment fin of the movable section bar.
In the door and window frame described previously, with an open-joint connection, the water that seeps inside them and/or is deposited on the walls of the section bars by condensation of the water vapour present in the air is conveyed to the collecting and drainage chamber where the flow is facilitated by the presence of an inclined terminal portion.
With the section bars and the projecting sealing strip described previously the drawback is, however, encountered that the water collecting and drainage chamber has a somewhat limited volume both due to the fact that the sealing strip is mounted on the folded-down tang and on the relief protruding laterally and to the fact that one edge of the sealing strip, adhering to the inclined terminal portion, occupies part of the volume of the chamber.
The object of the present invention is a complex of a section bar and of a sealing strip for door and window frames and a sealing strip for a section bar for door and window frames capable of forming a chamber with a large volume for collecting and draining the seepage and condensation water, without involving a change in the external and/or internal dimensions of the section bar.
The abovementioned object, according to the invention, is attained with a complex of a section bar and of a sealing strip for door and window frames, said section bar comprising a tubular casing having a substantially polygonal cross-section, provided with two lateral walls and with two end walls, one external, the other internal, at least one of said end walls being provided with an abutment fin and at least one of said lateral walls forming with said abutment fin a chamber for collecting and draining the seepage and condensation water, characterized in that said lateral wall is provided with a tang capable of supporting said sealing strip, said sealing strip being provided with a partially elastic channel-shaped connecting element, snap-engageable with said supporting tang so as to occupy a minimum volume of said water collecting and draining chamber.
A second embodiment of the invention consists of a sealing strip for a section bar for door and window frames characterized in that it comprises a partially elastic channel-shaped connecting element, snap-engageable with a tang supporting said section bar.
The complex of the section bar and of the sealing strip for door and window frames and the sealing strip according to the invention have the advantage that the sealing strip remains well in adherence to the tang supporting the section bar and it remains in contact with the lateral wall of the section bar only by means of lips thereof. In this way the sealing strip occupies a minimum space of the water collecting and draining chamber. A very ample chamber is thus provided that has a very large volume for collecting the water, the external and/or internal dimensions of the section bar being equal.
Further advantages of the invention are the ease of snap-assembly and disassembly of the sealing strip.
Features and advantages of the invention will now be illustrated with reference to an embodiment thereof represented as a non-limiting example in the enclosed drawings, wherein:

Fig. 1 shows a complex of a section bar and of a sealing strip for door and window frames made according to the invention;
Figs. 2 - 7 are partial views of variants of the section bar and of the sealing strip of Fig. 1;
Fig. 8 is a cross-sectional view of a door and window frame with an open-joint connection made with the complex of the sealing strip and of the section bar of Fig. 1.

There is shown in Fig. 1 a complex of a section bar and of a sealing strip for door and window frames, made according to the invention. The section bar, indicated as a whole with 1, in the particular case is metallic, in aluminum alloy, and has a substantially Z-shaped conformation. The section bar 1 can be of other material, such as plastic. The section bar 1 comprises a tubular casing 2 having a substantially polygonal cross-section, provided with two lateral walls 3 and 4, with two end walls 5 and 6, one inner and one outer. The tubular casing 2 has an octagonal cross-section, but it can also have a cross-section of a different shape, such as, for example, rectangular. The end walls 5 and 6 extend into abutment fins, 7 and 8, respectively, provided with pairs of inverted L-shaped folded-down tangs, 9 and 10, respectively, that form C- shaped seats 11 and 12 for housing sealing strips.
The lateral walls 3 and 4 have central portions, 13 and 14, respectively, rectilinear and parallel to one another and inclined terminal portions, 15, 16 and 18, 19, respectively. The inclined terminal portions 15 and 18 are convergent toward the wall 5 while the inclined terminal portions 16 and 19 are convergent toward the wall 6. The inclined terminal portions 15, 16, 18 and 19 join up with the abutment fins 7 and 8 to form chambers 20, 21, 22 and 23 for collecting and draining any seepage and condensation water. A water drainage hole 32 is drilled in the abutment fin 7. The lateral walls 3 and 4 are provided with pairs of inverted L-shaped folded-down tangs, 24, 25 and 26, 27, respectively, placed opposite the connecting areas between rectilinear portions 13 and 14 and inclined terminal portions 15, 16, 18 and 19. The pairs of folded-down tangs, 24, 25 and 26, 27 form C-shaped seats, 28 and 29, respectively, for housing organs for connecting to parts of hinges to be associated with the section bar. In the folded-down tang 24 there is a further drainage hole 40 for evacuating any condensation water that may collect in the seat 28 so as to facilitate its downflow toward the chamber 20. The folded-down tangs 25 and 26 are provided with reliefs protruding laterally, 30 and 31, respectively, while the folded- down tangs 24 and 27 have none.
The folded-down tang 24 supports a projecting (floating) sealing strip, indicated as a whole with 33, comprising a channel-shaped casing 34 provided with abutting lips 35, that remain in contact with the portions of wall 15 and 13, and with an edge 36 provided with a flexible sealing lip 37, that comes into contact with a corresponding abutment fin of a section bar of a movable frame, as will be illustrated later. The sealing strip 33 is provided with a partially elastic channel-shaped connecting element 38, having a U-shaped transversal cross-section and provided with a pawl 39. The connecting element 38 is incorporated in the channel-shaped casing 34 and it can be continuous, that is made of one piece, or discontinuous, that is formed by a plurality of separate pieces. Preferably, the sealing strip 33 is made of rubber or plastic and the connecting element 38 is made of charged polypropylene and is incorporated in the sealing strip 33 by coextrusion.
The sealing strip 33 is snap-mounted on the folded-down tang 24 and it remains firmly fastened to it by means of the connecting element 38 and the pawl 39. The connecting element 38 keeps the sealing strip 33 perfectly in adherence to the folded-down tang 24 by means of the pawl 39.
The lip 35 of the sealing strip 33 that is up against the inclined terminal portion 15 occupies a minimum space of the chamber 20. It is thus possible to obtain a chamber 20 with a large volume that ensures an optimum drainage of the seepage and condensation water.
The sealing strip 33 can be removed easily for replacement and maintenance by exerting a simple torsion movement on it.
The folded-down tang 27 can perform a function similar to that of the tang 24 and support a projecting sealing strip just like the sealing strip 33, because the Z-shaped section bar 1 can be mounted upside down with the end wall 5 and the fin 7 placed on the inside of the door or window frame and the end wall 6 and the tang 8 placed on the outside of the door or window frame.
The tangs 24 and 27 and the sealing strip 33 can have a shape other than that shown in Fig. 1. As an example, in Figs. 2 - 7 there are represented variants of the tang 24 and of the sealing strip 33.
There is shown in Fig. 2 a projecting sealing strip 133 provided with a partially elastic channel-shaped connecting element 138, having a U-shaped transversal cross-section, incorporated in a channel-shaped casing 134. The sealing strip 133 is snap-mounted on a supporting tang 124 with fins, protruding from a lateral wall 103 of a metal section bar 100, shown in part.
There is shown in Fig. 3 a projecting sealing strip 233 provided with a partially elastic channel-shaped connecting element 238, having a substantially U-shaped transversal cross-section, incorporated in a channel-shaped casing 234. The sealing strip 233 is snap-mounted on a straight supporting tang 224 protruding from the lateral wall 103 of the metal section bar 100.
There is shown in Fig. 4 a projecting sealing strip 333 provided with a partially elastic channel-shaped connecting element 338, having a U-shaped transversal cross-section and provided with two pawls 339, incorporated in a channel-shaped casing 334. The sealing strip 333 is snap-mounted on a supporting tang 324 having a T-shaped transversal cross-section, protruding from the lateral wall 103 of the metal section bar 100.
There is shown in Fig. 5 a projecting sealing strip 433 provided with a partially elastic channel-shaped connecting element 438, having a partially annular cross-section, incorporated in a channel-shaped casing 434. The sealing strip 433 is snap-mounted on a supporting tang having a substantially mushroom-shaped transversal cross-section 424 protruding from the lateral wall 103 of the metal section bar 100.
There is shown in Fig. 6 a projecting sealing strip 533 provided with a partially elastic channel-shaped connecting element 538, having a substantially trapeze-shaped transversal cross-section, incorporated in a channel-shaped casing 534. The sealing strip 533 is snap-mounted on a supporting tang 524 having a substantially trapeze-shaped cross-section, protruding from the lateral wall 103 of the metal section bar 100.
There is shown in Fig. 7 a projecting sealing strip 633 provided with a partially elastic channel-shaped connecting element 638, having a substantially U-shaped transversal cross-section, incorporated in a channel-shaped casing 634. The sealing strip 633 is snap-mounted, with a given interference, on an L-shaped folded-down tang 624, protruding from the lateral wall 103 of the metal section bar 100.
There is shown in Fig. 8 an open-joint movable door or window frame comprising a fixed frame 40 formed by the metal section bar 1 and a movable frame 41 formed by a metal section bar 50. The section bar 1 is fastened in a known manner to a doorpost and to a fixed part of a hinge, not shown. The section bar 50 holds a glass pane 43 by means of a pane-fastening element 44 and sealing strips 45 and is fastened to a movable part of the hinge by means of a connecting organ, not shown, mounted in a C-shaped seat 51. The abutment fin 7 of the section bar is aligned with an abutment fin 52 of the section bar 50 and between the section bars 1 and 50 there is interposed the projecting sealing strip 33. The edge 36 of the sealing strip 33 remains in contact with an abutment fin 53 of the movable section bar 50 by means of the lip 37.

Claims

A complex of a section bar (1; 100) and of a sealing strip (33; 133; 233; 333; 433; 533; 633) for door and window frames, said section bar (1; 100) comprising a tubular casing having a substantially polygonal cross-section, provided with two lateral walls (3; 103, 4) and with two end walls (5, 6), one external, the other internal, at least one of said end walls (5; 6) being provided with an abutment fin (7; 8) and at least one of said lateral walls (3; 103) forming with said abutment fin (7) a chamber (20) for collecting and draining the seepage and condensation water, characterized in that said lateral wall (3; 103) is provided with a tang (24; 124; 224; 324; 424; 524; 624) capable of supporting said sealing strip (33; 133; 233; 333; 433; 533; 633), said sealing strip (33; 133; 233; 333; 433; 533; 633) being provided with a partially elastic channel-shaped connecting element (38; 138; 238; 338; 438; 538; 638), snap-engageable with said supporting tang (24; 124; 224; 324; 424; 524; 624) so as to occupy a minimum volume of said water collecting and draining chamber (20).
A complex according to claim 1, characterized in that said supporting tang (24; 624) is folded down like an inverted L.
A complex according to claim 2, characterized in that said supporting tang (24) has a drainage hole (40) for evacuating any condensation water from a seat (28) of said lateral wall (3) so as to facilitate its downflow toward said chamber (20).
A complex according to claims 1 and 2, characterized in that said channel-shaped connecting element (38) has a substantially U-shaped transversal cross-section and is provided with a pawl (39) by means of which it is snap-engageable with said inverted L-shaped folded-down supporting tang (24).
A complex according to claim 1, characterized in that said supporting tang (124) is finned.
A complex according to claim 1, characterized in that said supporting tang (224) is straight and said channel-shaped connecting element (238) is finned.
A complex according to claim 1, characterized in that said supporting tang (324) has a T-shaped transversal cross-section and said channel-shaped connecting element (338) has two pawls (339).
A complex according to claim 1, characterized in that said supporting tang (424) has a substantially mushroom-shaped transversal cross-section and said channel-shaped connecting element (438) has a partially annular transversal cross-section.
A complex according to claim 1, characterized in that said supporting tang (524) has a substantially trapeze-shaped transversal cross-section and said channel-shaped connecting element (538) has a substantially trapeze-shaped transversal cross-section.
A complex according to claim 1, characterized in that said abutment fin (7) is provided with a further drainage hole (32) for the evacuation of said water collecting and drainage chamber (20).
A complex according to claim 1, characterized in that at least one of said lateral walls (3) of said tubular casing (2) has at least one inclined terminal portion (15) that joins up with said abutment fin (7) to form said chamber (20) for collecting and draining seepage and condensation water.
A complex according to claim 11, characterized in that each of said lateral walls (3, 4) comprises a rectilinear central portion (13; 14) and two inclined terminal portions (15, 16; 18, 19), each of said lateral walls (3, 4) being provided with a respective inverted L-shaped folded-down tang (24; 27) placed opposite a connecting area between said rectilinear portion (13, 14) and one inclined terminal portion (15; 19).
A complex according to claim 1, characterized in that the channel-shaped connecting element (38; 138; 238; 338; 438; 538; 638), is incorporated in said sealing strip (33; 133; 233; 333; 433; 533; 633) by coextrusion.
A complex according to claim 1, characterized in that said sealing strip (33) comprises a channel-shaped casing (34; 134; 234; 334; 434; 534) provided with abutting lips (35) and an edge (36) provided with a flexible sealing lip (37), said channel-shaped connecting element (38; 138; 238; 338; 438; 538; 638) being incorporated in said channel-shaped casing (34; 134; 234; 334; 434; 534).
A complex according to claims 1 and 14, characterized in that it is associated with a movable section bar (50), said sealing lip (37) being engageable with an abutment fin (53) of said movable section bar (50).
A sealing strip (33; 133; 233; 333; 433; 533; 633) for a section bar (1; 100) for door and window frames, characterized in that it comprises a partially elastic channel-shaped connecting element (38; 138; 238; 338; 438; 538; 638), snap-engageable with a supporting tang (24; 124; 224; 324; 424; 524; 624) of said section bar (1; 100).
A sealing strip (33) according to claim 16, characterized in that said channel-shaped connecting element (38) has a substantially U-shaped transversal cross-section, is provided with a pawl (39) and is engageable with an inverted L-shaped folded-down supporting tang (24; 624) of said section bar (1; 100).
A sealing strip (133) according to claim 16, characterized in that said channel-shaped connecting element (138) is engageable with a finned supporting tang (124) of said section bar (100).
A sealing strip (233) according to claim 16, characterized in that said channel-shaped connecting element (238) is finned and is engageable with a straight supporting tang (224) of said section bar (100).
A sealing strip (333) according to claim 16, characterized in that said channel-shaped connecting element (338) has a substantially U-shaped transversal cross-section, is provided with two pawls (339) and is engageable with a supporting tang (324) having a T-shaped transversal cross-section of said section bar (100).
A sealing strip (433) according to claim 16, characterized in that said channel-shaped connecting element (438) has a partially annular transversal cross-section and is engageable with a supporting tang (424) having a substantially mushroom-shaped transversal cross-section of said section bar (100).
A sealing strip (533) according to claim 16, characterized in that said channel-shaped connecting element (538) has a substantially trapeze-shaped transversal cross-section and is engageable with a supporting tang (524) having a substantially trapeze-shaped transversal cross-section of said section bar (100).
A sealing strip (33; 133; 233; 333; 433; 533; 633) according to claim 16, characterized in that said channel-shaped connecting element (38; 138; 238; 338; 438; 538; 638) is incorporated in it by coextrusion.
A sealing strip (33; 133; 233; 333; 433; 533; 633) according to claim 16, characterized in that it comprises a channel-shaped casing (34; 134; 234; 334; 434; 534; 634) provided with abutting lips (35) and an edge (36) provided with a flexible sealing lip (37), said channel-shaped connecting element (38; 138; 238; 338; 438; 538; 638) being incorporated in said channel-shaped casing (34; 134; 234; 334; 434; 534; 634).