The present invention relates to a pivotable balcony glazing structure or a similar wall-like covering form¬ ed by sheet-like sections, wherein each sheet is sus¬ pended by its top or bottom edge, preferably at two points, to a bearing rail secured to a balcony struc¬ ture or a like and the opposite edge of a sheet is sup¬ ported by one point on a second bearing rail secured to a balcony structure or a like, whereby the sheets can be carried one by one upon their points of support to the edge of an opening covered by the sheets and pivot¬ ed there upon the sheet hinge pins fitted in the points of support aligned with each other at the top and bot¬ tom edge of a sheet for example through 90 so as to expose the outward-facing surface of a sheet.

The glazings for apartment house balconies have become more and more popular over the recent years. The tra¬ ditional glazing type is such that the open side of a balcony is covered with sashed glass panes sliding upon rails mounted on the top and bottom edge, said panes overlapping in lateral direction. A drawback in this solution is that the glazing cannot be fully opened, which would be desirable e.g. on a hot day. Secondly, washing of their outward-facing surfaces is difficult and dangerous. In addition, the sash-fitted panes im¬ pair the appearance of a facade. Due to the above draw¬ backs, such glazings have not been accepted in quite a few cities.

Another prior known glazing type is the one v/herein the panes can be pivoted adjacent to the side wall of a balcony about a vertical axis, to lie inside a balcony. This is accomplished by means of a double-rail, the

inner one turning at the edge of a balcony to form a special pivoting rail which is mounted on the ceiling of a balcony. The panes are sliding upon two trolleys which are mounted on the top edge and journalled upon vertical axles in the top pane corners. When the trol¬ ley running on the inner rail reaches the pivoting rail, the corresponding edge of a pane swings inside a bal¬ cony. Thus, the pivoting occurs on three points, i.e. upon trolleys on the top edge and a single slider on the bottom edge.

The main drawbacks in this type of glazing are as fol¬ lows:

- due to the constructional reasons, a 1-wheel trolley pivotable on a vertical axle produces friction be¬ tween the wheel and the rail which may lead to ex¬ cessive wear.

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- Mounting of the pivoting rail requires exact precision since even a slight deviation of height can cause friction between the wheels and the rail, thus hamper¬ ing the pivoting movement of the panes.

- A pivoting rail fitted to the ceiling of a balcony is aesthetically undesirable.

- The pivoting-railed structure restricts the width of a pane to circa 650 mm since the handling of wider panes becomes inconvenient.

In an effort to eliminate these drawbacks a structure of the invention is designed in a manner that one of the hinge pins of a sheet, preferably the top edge hinge pin, is fitted with a latch which immobilizes the hinge

pin when the sheet is pivoted on the hinge pins.

In one preferred embodiment of the invention, the latch preferably comprises a bracket-like member which is made of a flexible material, preferably spring steel, and which is adapted to engage with a toothed portion mount¬ ed on the bearing rail or formed integrally therewith.

Another preferred embodiment of the invention is design¬ ed in a manner that the latch is adapted to rotate re¬ lative to the hinge pin through the intermediary of a spring to a latch locking position when a sheet is pivot¬ ed on the hinge pins.

A solution of the invention offers the following benefits over the prior art:

- In a sliding position the. carrier wheel is propped to extend parallel to the rail to thus eliminate the fric¬ tion between wheel and rail.

- The 90 rotation of a pane is effected upon two points, i.e. upon axle stubs fitted to the top and bottom cor¬ ner of a pane the same way as hinges, so a possible in¬ exact fitting does not affect.the pivoting movement.

- A structure of the invention does not require aesthetic¬ ally undesired parts jutting out of the slide rail.

- By virtue of the pivoting mechanism the width of a pane can be circa 800 mm without the handling being hamper¬ ed. Manufacturing and fitting costs will be reduced.

The invention will now be described in more detail by way of an example with reference made to the accompanying

drawings, in which:

Figs. 1 - 3 illustrate a hinged top corner in a glazing structure of the invention.

Figs. 4 - 6 illustrate an in-pivotable top corner in a glazing structure of the invention.

Figs. 7 - 9 illustrate a hinged bottom corner in a glazing structure of the invention.

Fig. 10 shows a glazing structure of the inven¬ tion in a section according to fig. 9 with two adjacent panes following each other.

Fig. 11 is a schematic frontal view of a glazing structure of.the invention.

Figs. 12 - 14 show the locking sequences for a latch in a glazing structure of the invention.

Figs. 15 and 16 are schematic frontal and plan views, respectively, of a glazing structure of the invention.

Figs. 17 - 19 illustrate an in-pivotable top corner in a glazing structure of the invention in an alternative embodiment.

In a pivotable balcony glazing of the invention (Fig. 15 and 16) , a necessary number of laterally sliding glass panes 13 are suspended by means of wheels 45, 46 at the top edge of each pane from a top rail 1 fixed to a balcony structure. A bottom rail 31 steers the bot-

torn end of a pane during its sliding pivoting. A pane of similar construction as the others at one or both ends of a glazing is usually fixed in position so as to be laterally immobile.

When opening the gazing, the first pane is pivoted or folded relative to the top and bottom rails upon its fixed hinges through 90° to lie against the side wall of a balcony. This is followed by sliding the follow¬ ing pane adjacent to the first one, whereafter it is pivoted relative to a vertical axis, as described here¬ inafter in more detail, to lie on top of the previously folded pane, followed by sliding the next pane adjacent to the latest folded one and pivoting it relative to a vertical axis to lie on top of that etc. until all the panes are pivoted or folded. Pivoting of the pane is effected upon two points, i.e. an axle stub 6 journalled in a bracket structure 4 of- wheel 45 and. an axle stub 40 fixed to a bottom corner of the pane and fitted in a hole made in a slider 39 mounted on lower slide rail 31.

In order to make it possible to pivot a pane, the pivot¬ ing axle of a pane must be locked in position and, on the other hand, a wheel 46 carried by upper rail at the in-turning end of a pane must be brought out of the upper rail. This can be done in the following fashion.

When a first freely sliding pane 13 is slid adjacent to a pane turned through 90 on fixed hinges to lie against the side wall of a balcony, a slider 39 mounted on low¬ er rail 31 meets a stop screw 42. When the rear edge of a pane is pressed from its upper portion with a cer¬ tain force 30, as shown in figs. 11 and 15, a pane 13 is tilted and a bracket structure 4 of wheel 45 touch-

es an upper hinge body 7 of the fixedly hinged pane. Thus, a wheel 46 comes up out of a trough 21 of upper rail 1. At the following pane said stop screw 42 is not needed as the pivoted pane is already inclined at an angle set by stop screw 42.

Figs. 4 - 6 illustrate an opening 17 which is machined in upper rail 1 and does not allow wheel 46 out of the rail as the pane is pivoted. The edge of trough 21 can be formed with a notch for turning the wheel aside but, in view of a smooth operation, it is preferred that the wheel -rises up more or less prior to pivoting the pane. The opening 17 is provided with a wing-shape bracket 20 which prevents the backward tilting of a pane at this stage.

It should be noted that the position of wheel 46 varies in various panes in order to turn wheel 46 through one and the same opening 17.

Figs. 17 - 18 illustrate an alternative design to re¬ place the wheel structure shown in figs. 4 - 6. This design is such that a bracket structure 18' fixed sup¬ ported relative to a sheet 13 is provided with two wheels 46', 46", one 46" being journalled to bracket structure 18' by means of a vertical axle. Said axle serves at the same as the rotating axle for wheel 46". The horizontal rotating axle of the other wheel 46" is tiltably supported through the intermediary of an axle 48, supported on the bracket structure and extend¬ ing parallel tp bearing rail 1. Wheel 46" leans con¬ tinuously on the inner surface of bearing rail 1 and, thus, when opening a pane 13, also against a bracket 20, whereby the pane can be readily pulled in while the vertically supporting wheel 46' is tilting simul-

taneously, possibly assisted by the action of a spring (not shown) .

The bracket structure 4 of wheel 45 is journalled re¬ lative to pane 13 so as .to pivot in horizontal direc¬ tion around a pin 6, as pointed out hereinbefore. The pin 6 comprises a screw provided with a large-size head 12 and is fixed by its head 12 to the upper jamb 3 of pane 13. The threaded upper end of pin 6 is inside an internally threaded sleeve 8 and the base portion of sleeve 8 is designed to be turned with a wrench, prefer¬ ably as a hexagonal base, for adjusting the vertical position of pane 13 at opening 17.

The side surface of bracket structure 4 is fitted with a tongue-like latch 9. Around said pin 6 is coiled a spring 11 which is fixed by one of its ends to bracket structure 4 and by its other end leans against a limit- er pin 10 mounted on upper jamb 3, said spring main¬ taining the bracket structure of wheel 45 in parallel relationship with the pane and upper rail 1 whenever wheel 46 is inside the upper rail and the pane is in a sliding position but, as the bracket structure 18 of wheel 46 comes out of upper rail 1 within the range al¬ lowed by a limiter 20, said pane 13 and its upper jamb 3 as well as bracket structure 4 of wheel 45 are pivot¬ ed to the extent that the free end of latch 9 is press¬ ed into a toothed rack 16 mounted on the edge of upper rail 1 to prevent the backward tilting of the pane. As pane 13 is pivoted further, said bracket structure 18 of wheel 46 moves out of alignment with limiter 20 but spring 11 makes sure that said latch 9 remains lock¬ ed in toothed rack 16 and said bracket structure 4 of wheel 45 operates the same way as a fixed hinge. Thus, each pane can be pivoted in its turn through 90 to lie

adjacent to the side wall of a balcony (Figs. 12, 13, 14).

The bottom edge of each pane 13 is provided with a jamb 35 which carries downwards directed pins 40, 44 at both ends. The lower slide rail 31 is provided with a groove to accommodate sliders 38, 39 which differ from each other only in the sense that slider 38 is locked fixedly in position. A pin 40 mounted on the pivoting edge of each pane 13 fits in a hole made in slider 38, 39 for building a sliding and/or pivoting hinge steering one of the bottom corners of a pane.

A pin 44 mounted on the in-turning bottom corner of a pane fits in a notch 43 made in slider 39 for locking said bottom pane corner in position as the edges of the panes are pushed against each other for closing the glazing.

When closing the glazing, each pane 13 is pivoted in turn back through 90 , i.e. to lie parallel to the rails. Thus, said pin 10 releases latch 9 from toothed rack 16 and wheel 46 drops into the upper rail groove 21 and the pane is able to slide back to a closed position.

Latch 9 can be made e.g. of spring steel whereby it de¬ flects and the weight of a pane keeps it locked on tooth¬ ed rack 16 until a certain force 30 is appled to the edge of a pane to release the latch. This serves to avoid jolting movements.

The panes are preferably manufactured of tempered glass.

The glazing can be designed to be assembled at one or both ends of a balcony.

The vertical edges of the panes are either without jambs or. jambed and unsealed or provided with a sealing,

Sealings 15, 37 at the top and bottom edge are prior known brush or e.g. silicone sealings and their dis¬ position can be different from what is shown in the figures.