GB2225050A - Horizontally hinged swivelling window - Google Patents

Abstract

A horizontally hinged window 2 has a strut 4 and instead of sliders moving in grooves or rails in a window frame (1) for guiding the movement of the associated window sash, the moving members are provided with rollers (10, 12), which have rolling friction in associated grooves or rails (9;9'). <IMAGE>

Description

An arrangement in fittings for a horizontally hinged swivellinz window.

The present invention relates to an arrangement in fittings for a horizontally hinged pivoting window, in which the window sash at its top edge, and one end of at least one supporting arm have guided means running in grooves or rails at the sides of the window frame to determine the opening and closing movement of the window sash.

Windows with fittings of this kind are much used and many designs of the fittings were previously developed to guide the window frame, so that would be balanced to the greatest possible degree in all positions. Also, it should be possible to swivel the window sash all around, to enable a person to stand safely inside in a house or a building cleaning the outside of the window pane when it faces inwards.

The members moving in grooves or rails are manufactured from a suitable plastic materiale, preferably such a material having a self-lubricating effect relative to the material of the rail, which may, e.g. be made of extruded aluminium. Said members, which are called slides and sliders, provide satisfactory guidance for sliding motion in certain portions of the opening and closing movement of the window sash but, especially after some wear, a kind of wedging prooved to occur. This is the case, especially when the window is in an approximately midway position. The mechanism of the fittings is then in an extreme position and turns to go back to its original position, whether the window sash is to be opened further from its midway position to be turned around, or it is to be closed again.In this switching of movement of the fittings sliding members may, as mentioned, wedge or brake sharply, which will subject the mechanism of the fittings to loads for which the fittings are not intended and which may cause damage and a shortened lifetime.

It is an object of the present invention to provide such an arrangement with fittings for horizontally hinged pivoting windows, in order to avoid said disadvantages of wedging and increased friction after a period of utilization.

According to the invention this is achieved by the fact that in stead of sliders rollers are used which are guided in the grooves. There is much less roller friction than the friction between mutually sliding members, and there are far less dimensional changes due to rolling than due to sliding.

Any requirement of lubrication will, thus, in fact be redundant.

The invention is characterized by the features stated in the claims and it will be disclosed in more detail below with reference to the drawings, in which: Figure 1 shows an arbitrarily selected window design with part of the window frame removed, and Figure 2 shows a section through an advantageous embodi ment of a rail, Figure 3 shows a second embodiment of an arbitrarily selected window with part of the window frame removed, Figure 4 shows a section through a second advantageous embodiment of a rail, Figure 5 shows a window lock for cooperation with the window fittings.

The window of Figure 1 comprises a window frame 1 and a sash 2 which is suspended in fittings of a design known per se with arms 3 and 4 that are slewably mounted at fastening points 5 and 6 on frame 1, and sash 2, respectively. The upper rim 7 of window sash 2 has a guided means 8 in a groove 9 which may be milled in the sash per se but is, preferably, a rail of extruded aluminium. According to the invention, guided means 8 is provided with rotatable rollers 10 running in rail 9. The same goes for one end 11 of arm 4, which in stead of a slider also has a roller 12 facilitating movement of the arm and supporting the same more stably in rail 9.

As shown in Figure 2, rail 9 may have a groove 13 which is undercut or a dovetail groove, with rollers 10 and 12 being correspondingly shaped to provide good contact against inclined faces 14 of the groove. Due to the fact that rollers 10 and 12 do not slide, but roll in groove 13 in rail 9, the manufacturers will also be able to choose more freely among materials for the rollers.

To facilitate understanding, it should be mentioned that fittings 5 for arm 3 are commonly secured in the portion of window frame which is removed in Figure 1. The same is true of the rail in which rollers 10 and 12 are to run. Said rail also sits on the portion of the window frame that is not shown. Rail 9 which is visible in the Figure, sits on the opposite portion of frame 1 and forms a guide for the guided member which is located at the opposite corner of the window sash and corresponds to guided means 8, although, obviously, it has its rollers facing in the opposite direction and engaged with rail 9.

Fittings in Figure 3 departs from those shown in Figure 1 in that two guide rails 9 and 9' are used, one pair of rails provided on each side of frame 1. Similarily with Figure 1, top edge 7 of window sash 2 has a guided means 8 with a couple of rollers 10 running in the rear one 9 of guide rails. In front rail 9' fastening point 5 for fittings is provided uppermost, like in Figure 1. In fastening point 5 arm 3 is pivotally mounted and at its lower end it is at 15 pivotally mounted to the other arm 4 of the fittings. One end 6 of the arm is pivotally mounted at a fastening point on window sash 2. The other end 11 of arm 4 is, via roller 12 movably connected with front rail 9'.

In the embodiment shown in Figure 3, which is the preferred embodiment, frame 2 may be turned approximately 1800 in frame 1, whereas with the approach shown in Figure 1 it will only be possible to turn the window approximately 4200. In the same manner as in the embodiment of Figure 1, lubrication of guided means or rails is now entirely eliminated.

Rail 17 in Figure 4 is slightly more simple than the one shown in Figure 3, having straight lateral edges 16 which are bent inwards at the mouth of the rail. Such a roller rail is known per se.

In Figures 1 and 3 two rollers 10 are shown on guided member 8. This will ensure parallel displacement of the guided means when necessary, but embodiments with only one roller at the top edge of the window sash are also possible, since there are, to day, many different embodiments of fittings for horizontally hinged pivoting windows for which the invention may be utilized to advantage.

In order to secure the window in a position for ventilating, and to actuate a suitable mechanism in a simple manner, it is suggested to provide a locking tongue 18 on arm 4. The locking tongue may, e.g. be provided with two notches 22 (although the number is not limited to two) for engagement with a locking hook 21, which is spring loaded by the aid of spring 20. The locking engagement is released when handle 19 is moved upwards against the force of spring 20. Locking tongue 18 is preferably provided at an angle between 600 and 900 on arm 4.

This embodiment permits preliminary release of the lock by an upward displacement of handle 19, which is at the rear side of the frame. It is, thus, possible to avoid actuating the locking means which is placed in connection with slide rail, and which is known as a great hazard of pinching injuries of the fingers.

Claims (5)

CLAIMS:

1.

An arrangement in fittings for horizontally hinged pivoting windows, in which the window sash at its top edge and the end of at least one supporting arm are provided with guided means running in grooves or rails in the sides of the window frame to determine opening and closing movements of the window sash, c h a r a c t e r i z e d i n that the guided means comprise rotatable rollers (10,12) which engage in gooves or rails (9; 9';13; 17).

2.

An arrangement as stated in claim 1, c h a r a c t e r i z e d i n that the cross section of grooves is dovetail (13), and that rollers (10,12) are correspondingly shaped.

3.

An arrangement as stated in claims 1 and 2, c h a r a c t e r i z e d i n that each guided means at the top rim of window sash (2) comprises at least two rollers (10).

4.

An arrangement as stated in claim 1, c t; a r a c t e r i e d i n that there is a front rail (9'), and a rear rail (9) on each side of the frame, guiding means (8,10) being associated with rear rail (9), whereas guide means (12) for the end (11) of said supporting arm (4) is associated with front rail.

5.

An arrangement as stated in claim 1, c h a r a c t e r i z e d i n that from the lower portion of said supporting arm a locking tongue (18) projects and is intended for cooperation with a spring loaded locking hook (21) projecting forward through frame (1).