IE53788B1 - Composite window - Google Patents

Abstract

1. Double casement frame for a compound window in which an outer casement frame (1) and an inner casement frame (2) respectively formed of essentially L-shaped and essentially T-shaped plastics hollow profile bars are fixed to one another by means of hinges (34), and the outer and inner profile bar comprising on the sides turned towards one another a pair of projections (16, 17, ; 26, 27) for resting in one another for reducing displacement of the outer and inner casement frames with respect to one another, characterized in that the projections (16, 17) on the outer casement frame (1) fit in the open (262) formed by projections (26, 27) of the inner casement frame (2), with the height H1 of the projections (16, 17) of the outer casement frame (1) being greater, preferably about twice as large as the height H2 of the projections (26, 27) of the inner casement frame and the projections (26, 27) of the inner casement frame (2) between them forming a groove (262) widening outwardly, so that the casement frames (1, 2) make contact with each other in essence lengthwise of the top surfaces (161, 171) of the projections (16, 17) of the outer casement frame (1).

Description

The invention is concerned with a double casement frame for a composite window, wherein an outer casement frame and an inner casement frame are formed of plastics hollow shaped bars with the outer casement frame being of essentially L-shape and the inner casement frame being of essentially T-shape, and are fixed together by means of hinges, and the outer and inner profiled bars at the sides directed towards one another each comprise a pair of projections for resting in one another for reducing the displacement of the outer and inner casement frames with respect to one another.

A double casement frame is known from German Utility Model 69 49 357, which is first prepared from a single component frame component already prepared for the receipt of two window panes, with which, in connection with the completion, the one component double casement frame is then sawn into outer and inner casement frames, parallel to its surface. Then the one casement frame with support mouldings is rested in the other casement frame in a correspondingly undercut groove. German Auslegeschrift 27 42 998 makes known a process for the preparation of a double casement frame for a window without a door, wherein plastic profiled bars for the outer and inner casement frames are made to rest together in undercut projections, after which they are trimmed and are welded together to the finished frame following the cutting out of the welding positions of the support mouldings in the mitering region. - 2 53788 The invention is directed to providing a double casement frame for composite windows with good precision of fit and simple production procedure, starting from the state of the art, wherein, in particular, the problem of achieving non-welding of the double casement frame in the mutual welding process in the region of the mitering, and subsequent separation, is better resolved.

According to the invention, there is provided a double casement frame for a composite window, wherein there are fixed together by means of hinges an outer casement frame of essentially L-shape and an inner casement frame of essentially T-shape, both being formed of plastics hollow profiled bars, and the outer and inner profile bars comprising on the sides turned towards one another a pair of projections for resting on one another for reducing the displacement of the outer and inner casement frames with respect to one another, the projections on the outer casement frame fitting into an open groove formed by the projections of the inner casement frame, the height of the projections of the outer casement frame being greater than the height of the projections of the inner casement frame, and the projections of the inner casement frame between them forming a groove widening outwardly, so that the casement frames touch each other in essence lengthwise of the top surfaces of the projections. Preferably, the height of the projections of the outer casement frame is approximately twice the height of the projections of the inner casement frame.

The novelty therefore proceeds from making the two casement frames rest within one another, with there being provided merely a guiding by means of projecting webs at both casement frames. With this it is essential that the webs do not completely overlap one another but rather provide an only partial overlapping of the webs as a result of their formation with different heights. In this way, on simultaneous welding of the mitered corners of outer and inner casement frames in the mitered region, only a minimal undesired welding of the projections with one another is effected, with however the region X (Figure 3) remaining free and being separable by simple displacement with respect to one another of the inner and outer casement frames without additional separating work by means of machines or by means of tools. The outer or inner casement frames are provided with a projection in space saving manner which forms simultaneously the surfaces on which the glass panes are to be laid and also the abutment for the fixing of the glass holding ridge. Thus, the outer casement frame is preferably formed with a - 3 5 3 7 8 8 projection which is set at an angle to the internal angle of the L-shaped profile, the upper side of this projection serving as contact surface for a glass pane and the lower side of the projection serving as an abutment for a glass support moulding. In addition, or alternatively, the inner casement frame may have a glass holding support on the internal side of which there is formed a projection extending at right angles for receipt of a glass pane, said projection also forming an abutment having an insertion groove for a glass support moulding.

In order to connect the two casement frames with one another by means of a hinge, outer and inner casement frames form an undercut fixing groove surrounding the inner casement frame On one side. In this way a simple assembly of the double casement frame is made possible.

In order to create ventilation between the panes of the composite window, it is proposed that the projections on the upper and lower transoms of the casement frame be planed away at a plurality of positions up to about 25 mm in length so that there exist ventilation openings.

The invention is explained in the drawings by way of example.

There are shown FIGURE 1 a cross section through the L-shaped profile of the outer 2o casement frame, FIGURE 2 a cross section through the T-shaped profile of the inner casement frame, FIGURE 3 a cross section through the composite window with frame for a blind and double casement frame, FIGURE 4 a horizontal cross-section through a composite window and FIGURE 5 a horizontal cross-section through a composite window with Venetian blinds incorporated.

The invention is concerned with composite windows made of plastic hollow profiled bars, wherein the double casement frame is composed of the two profiles--—-----—------ 4 53788 shown in Figures 1 and 2. Figure 1 shows, in crosssection, the outer casement frame 1, which is formed in essentially L-shape with for example two hollow chambers, 10,11. The hollow chamber 10 forms at the same time the abutment ridge for the glazing, whereas the hollow chamber 11 is the central hollow chamber which can optionally be reinforced by means of a reinforcing profile 30 made of galvanized steel, aluminium or the like.

The projection 12, which is arranged at an angle in the inner L-angle of the hollow profile, serves for holding the glass panes. This projection forms, on its upper surface, the contact surface 121 for the glass panes and on the opposite side, the projection 122 which serves as abutment for the glass holding ridge together with the lifter 13 at the internal boundary of the profile. On the side turned towards the casement frame, the profile 1 is formed with the U-shaped projection 15 which moreover comprises, on one side, the stop projection 151 for lying adjacent the blind frame. This U-shaped projection 15 forms with the inner limiting surface of the profile a part of the fitting groove 8, as more closely shown in Figure 3. On the side turned towards'the inner casement profile, the outer profile is formed with the projections 16,17 for establishment of the registering with respect to the inner casement profile. The projections 16,17 possess the height Hj and the external separation from one another A1· They form on their topside, the top surfaces 161,171 with which they sit on the inner casement profile. Between the projections 16,17 is the groove 162 which opens outwardly. The casement profile is extruded, for example from rigid PVC.

In Figure 2 there is shown the inner casement profile in its T-shape form. It comprises the three hollow chambers 20,21,22, wherein the hollow chamber - 5 5 3 7 8 8 forms the glass holding projection for the receipt of the glazing, the hollow chamber 22 the so-called stop projection for being adjacent to the blind frame and 22 the central chamber which is optionally rein5 forced by means of the reinforcing profile 31.

Separated from the central chamber with formation of the holding groove 233 there is provided at the glazing projection of the casement profile 2 the projection 23 whose upper side forms at the same time the contact surface for the glazing and is constructed at its under side with the projection 231 for the engaging of a glass holding support. At the inner side of the casement profile 2, still in the region of the glazing, the prominent projection 24 is provided as abutment for the glass holding support. On the side turned towards the outer casement profile 1, the inner profile 2 is formed with the pro jections 26,27 which possess the height Hg and which form between them a groove 262 opening outwardly. The base of the groove has a width Ag. The external separation A^ of the projections 16,17 of the outer casing profile 1 corresponds to the width of the groove base Ag between the projections 26,27 of the inner casement profile, so that the projections 16,17 can be seated at the groove base of the groove 262. The height Hg of projections 26,27 is smaller than the height of the projections 16,17 of the outer casement profile, preferably about one-third to one-half.

Xn Figure 3 there is shown a cross-section through the composite window when put together. At the casement frame 7 whose fixing in masonry is not shown, there is affixed the double casement frame composed of the outer casement frame 1 and the inner casement frame 2. With this arrangement, the projection 151 of the outer casement frame 1 lies on the projection of the blind frame 7, the projection 25 of the inner casement frame is contacted by the central sealing 9, which is fixed to the blind frame 7, and tbe abutment projection 22 of - 6 5 3 7 8 8 the inner casement frame lies over an inserted sealing 33 on the inner side of the blind frame.

Outer and inner casement frames are not shown connected with one another by means of a hinge which is housed in the groove 8. Security against slipping and the exactness of fit of the casement frames are produced by the projections 16,17 of the outer casement frame which are matched to one another in the groove formed in the inner casement frame by the projections 26,27.

In the region of the welded mitred corners, the possible joining produced by the welding may he removed by simple displacement with respect to one another (breaking up) of the casement frames so that a trouble free opening of the individual casement frame of the double casement is guaranteed. Figure 3 shows moreover the fixing of the outer glass pane 3a and the inner glass pane 3i by means of sealing profiles 5 inserted in the profiles as well as the outer glass support moulding 6a and the inner glass support moulding 6i. The glazing sits as a rule on limiting blocks 4 on the projections 12 or 23 of the outer or inner casement profiles 1,2 respectively. On the inner casement profile 2, there is formed on the side turned towards the outer casement profile 1, in addition to the projections 26,27, a small groove 251 which together with the angle-shaped formation 152 of the casement profile 1 forms the so-called fitting groove for receipt of hinges, that is joint and ties. This fitting groove is formed right around the double casement frame.

In Figure 4 there is shown a horizontal section through a composite window in which additionally the hinges are shown, namely the coupling part 35 and the tie 34.

Figure 5 shows likewise in horizontal section through a composite window the additional arrangement of a Venetian blind 36.

Claims (7)

1. A double casement frame for a composite window, wherein there are fixed together by means of hinges an outer casement frame of essentially L-shape and an inner casement frame of essentially T-shape, both being formed 5 of plastics hollow profiled bars, and the outer and inner profile bars comprising on the sides turned towards one another a pair of projections for resting on one another for reducing the displacement of the outer and inner casement frames with respect to one another, the projections on the outer casement frame fitting into an open groove formed hy the projections of the 10 inner casement frame, the height of the projections of the outer casement frame being greater than the height of the projections of the inner casement frame, and the projections of the inner casement frame between them forming a groove widening outwardly, so that the casement frames touch each other in essence lengthwise of the top surfaces of the projections. 15

2. A double casement frame according to Claim 1, wherein the height of the projections of the outer casement frame is approximately twice the height of the projections of the inner casement frame.

3. A double casement frame according to Claim 1 or Claim 2, wherein the projections of the outer casement frame are planed off on the upper and lower 20 transoms of the outer casement frame at a plurality of positions, each up to about 25 mm long, so that ventilation openings exist.

4. A double casement frame according to any preceding claim, wherein the outer casement frame is formed with a projection which is set at an angle to the internal angle of the L-shaped profile, the upper side of which serves 25 as contact surface for a glass pane, and the lower side of which serves as an abutment for a glass support moulding.

5. A double casement frame according to any preceding claim, wherein the inner casement frame has a glass holding support on the internal side of which there is formed a projection extending at right angles for receipt of a 30 glass pane, said projection also forming an abutment having an insertion groove for a glass support moulding.

6. A double casement frame according to any preceding claim, wherein - 8 5 3 7 8 8 the outer and inner casement frames form together an undercut insertion groove extending around one side of the inner casement frame.

7. A double casement frame for a composite window, substantially as described herein with reference to the accompanying drawings.