EP0013228B1 - Device for holding a window in an opened position - Google Patents

Description

The present invention relates to a window opener comprising a stop arm connected at one end to the fixed frame and a holding element fixed to the leaf, the stop arm being able to cooperate with said holding element to immobilize the leaf in a position d 'determined opening.

Known window stays generally include a stop arm mounted on a ball joint fixed to the frame and a holding element fixed to the leaf, the stop arm being able to cooperate with said element to immobilize the leaf.

This type of linker is necessarily mounted on the vertical uprights of the leaf and the sleeping frame, because the stop arm hangs in the rest position and this implies that it cannot be mounted on a horizontal crosspiece of the sleeping frame. However, the current models of leaves, in particular of metal, consist of very narrow profiles on which it is impossible to fix an element.

In addition, in the current half-openers, the stop arm is simply engaged on the element fixed to the leaf and it is easy to open the window from the outside by passing the hand through the interlocking to raise the arm.

The object of the invention is to provide a window stay which can be placed both on the horizontal crosspieces and on the vertical uprights of the window, and which in addition cannot be opened from the outside.

The subject of the invention is a window opener of the aforementioned type, in which the stop arm is pivotally mounted relative to the sleeping frame along an oblique axis relative to the perpendicular to the joint plane defined between the leaf and the sleeping frame. in the area of the stay-open device, the arm being at rest substantially parallel to the joint plane, and the free end of the stop arm and said retaining element are arranged so that, the stop arm having been previously moved away from its rest position, the opening of the leaf causes the engagement with blocking of said holding element on the free end of the stop arm and the immobilization of the latter.

The fact that the stop arm is, in the rest position, directed parallel to the joint plane makes it possible to mount it as well on a vertical upright as on a horizontal crosspiece.

The oblique arrangement of its pivot axis has the effect that its free end, placed outside the path of the leaf in its rest position, intercepts this trajectory when the arm has been sufficiently spaced from its rest position.

Due to the fact that the stop arm has only one degree of freedom, it is easy to place it appropriately so that the opening of the leaf causes the engagement of the holding element on the free end of the arm and therefore the complete immobilization of the latter.

In a first embodiment, the pivot axis of the stop arm and said perpendicular to the joint plane define a plane substantially parallel to the leaf and to the standing frame.

In another embodiment, the pivot axis of the stop arm and said perpendicular to the joint plane define a plane substantially orthogonal to the leaf and to the fixed frame.

The invention will be clearly understood on reading the description below of two embodiments shown in the accompanying drawings.

• - les figures 1 a et 1 b représentent de face un entrebâilleur de fenêtre selon l'invention dans une première forme de réalisation, respectivement en position de repos (fenêtre fermée) et en position de fonctionnement (fenêtre entrebâillée);
• - les figures 2a et 2b représentent en vue de dessus l'entrebâilleur des figures 1 a et 1 b, respectivement en position de repos et en position de fonctionnement;
• - la figure 3 est une vue prise suivant les flèches Ill-III de la figure 16, le bras d'arrêt étant représenté en trait fin;
• - la figure 4 montre la partie fixée au bâti dormant dans une seconde forme de réalisation;
• - la figure 5 est une vue de face analogue à la figure 1a, mais pour la seconde forme de réalisation;
• - la figure 6 est analogue à la figure 3 mais pour la seconde forme de réalisation;
• - la figure 7 illustre une troisième forme de réalisation de l'invention; et
• - la figure 8 illustre une variante par rapport à la réalisation de la figure 7.

In these drawings:

• - Figures 1a and 1b show a front window opener according to the invention in a first embodiment, respectively in the rest position (closed window) and in the operating position (ajar window);
• - Figures 2a and 2b show a top view of the stay of Figures 1a and 1b, respectively in the rest position and in the operating position;
• - Figure 3 is a view taken along the arrows III-III of Figure 16, the stop arm being shown in thin lines;
• - Figure 4 shows the part fixed to the sleeping frame in a second embodiment;
• - Figure 5 is a front view similar to Figure 1a, but for the second embodiment;
• - Figure 6 is similar to Figure 3 but for the second embodiment;
• - Figure 7 illustrates a third embodiment of the invention; and
• FIG. 8 illustrates a variant with respect to the embodiment of FIG. 7.

The window stay represented in FIG. 1 a is made up of a part 1 fixed on the lower cross-member T of the window frame and a keeper 2 fixed on the opening frame or leaf C of the window. Leaf C opens from right to left in Figures 1a and 1b, the hinges, not shown here, being on the left.

Part 1 comprises an elongated base 3 fixed to the cross-member T for example by screws 4 and a stop arm 5 pivotally mounted at one end on the base 3. In the rest position, the arm 5 is placed on the base 3 and is substantially parallel to the joint plane P defined between the cross member T and the leaf C.

The pivot axis a-a of the arm 5, which is shown in phantom, forms an angle A with the perpendicular to the joint plane P, this angle being chosen to be equal to 15 ° in the present example. It can be seen in FIG. 1 a that the axis a-a defines with said perpendicular a plane parallel to the general plane of the window.

So when you put arm 5 in the operating position shown in Figures 1b and 2b, its free end 6 is caused to intercept the path followed by the arm of the leaf C and therefore by the keeper 2 when the window is opened.

Of course, the invention is not limited to the value indicated above for the angle A. The value of A must be determined at the same time as the length of the stop arm 5 so as to obtain the effect explained above. In practice, however, the angle A will be between 10 and 20 °.

The arm 5 is bent and comprises two portions 7 and 8. The portion 7 directed perpendicular to the pivot axis aa, is received in a housing 9 formed in the base 3. The pivoting assembly is produced by providing the portion 7 with two pins, not visible in the drawings, which are engaged in suitable holes.

The portion 8 which extends the portion 7 forms with it an angle equal to the angle A, that is 15 °. The end 6 which ends the portion 8 is projecting and carries ribs 10, 10 ′ on its two faces (FIG. 3), which ribs form an angle A with the pivot axis of the arm 5. The ribs 10, 10 'are extended by elements 11, 11' bent outwards. Outer, in the example shown, the arm 5 has, over its entire length, reinforcing ribs 12, the ribs 10, 10 'of which constitute the extension. The role of the ribs 10, 10 'and the elbow elements 11, 11' is to allow a locking connection of the arm 5 with the keeper 2, as will be explained below.

The keeper 2 fixed on the leaf C is provided with an opening 15 placed so as to be opposite the end 6 of the stop arm when the latter has been put in the stop position.

The edge 16 of the opening 15 located on the side of the rest position of the arm 5 is inclined relative to the perpendicular to the joint plane by an angle substantially equal to the above-mentioned angle A, ie 15 °. In the corresponding wall (on the left in the drawings) is formed a groove 17 (fig. 3) opening on the side of the joint plane, the bottom of which is parallel to the edge above, and this groove is surmounted by a recess 18 which, unlike the groove 17, does not extend until it opens onto the lower face of the keeper 2 but is closed by a wall 19. The groove 17 and the recess 18 are shaped to receive the rib 10 and the bent element 11 of the stop arm 5.

The keeper 2 comprises a part 20 comprising a tongue 21 which largely closes the opening 15 and whose edge is parallel to the abovementioned edge 16. The part 20, which can be fixed to the main part of the keeper by a screw 22 also used for fixing the keeper to the leaf C, is sufficiently flexible so that the tongue 21 deviates elastically from its natural position when it is pushed back by the end 6 of the stop arm.

The part 20 also includes an outer portion 23, perpendicular to the tongue 21, on which one can act to trigger the unlocking, as we will see.

Note that in the example described, all the elements are made of rigid plastic and the elasticity of the part 20 is provided by the intrinsic elasticity of the material which constitutes it.

To operate the stay, first of all rotate the stop arm by an appropriate angle to the position shown in Figures 1b and 2b, the leaf C is then closed. When the leaf is opened, the keeper 2 comes into contact with the free end 6 of the arm and more particularly the tongue 21 comes into contact with the rib 10 and flexes. The end 6 can thus penetrate further into the opening 15 of the keeper. This allows the rib 10 'located on the other face of the end 6 to be housed in the groove 17, and the elbow 11' to be housed in the recess 18. In this position shown in Figure 3, a solid connection is made between the keeper 2 and the stop arm 5, because, on the one hand, the tongue 21 prevents the rib 10 'from coming out of its groove 17 and, on the other hand, the engagement of the bent element 11 'in the recess 18 closed by the wall 19 eliminates any risk of lateral exit. The leaf C is then immobilized in a determined so-called operating position.

To end this connection and release the leaf, you must press on the outer portion 23 of the part 20, bring the part of the free end 6 which protrudes from the keeper of the outer portion 23, to release the rib 10 ' from the groove 17, before releasing the end 6 of the opening 15 from the keeper.

It should be emphasized that this unlocking method in practice prohibits opening from the outside, unlike conventional half-openers of which it suffices to raise the stop arm to release the leaf.

A second embodiment of the invention is shown in Figures 4 to 6. In this variant, the pivot axis a'-a 'of the stop arm 105 shown in phantom in Figure 4, is always inclined d 'an angle A with respect to the perpendicular to the joint plane, but the plane defined by the pivot axis a'-a' and said perpendicular is this time perpendicular to the general plane of the window.

The inclination of the pivot axis simply results from the inclination of the base 13 on which the arm 105 is pivotally mounted. This can be seen in FIG. 4, where it can be seen that the base 103 has a substantially triangular section or trapezoidal with an angle A between its upper face and its base A being here 15 °.

It will also be noted that in this variant, the rib 110 is parallel to the pivot axis of the lever 105, contrary to the arrangement of the first embodiment. The axis pivoting a'-a 'having its projection in the plane of the window merged with the perpendicular to the joint plane, it becomes possible to produce the keeper 102 symmetrically so that it can be placed indifferently on a straight leaf or a left leaf. This is illustrated in FIG. 5. It can be seen in FIG. 5 that the keeper 102 has a plane of symmetry S. The tongue 121 of the part 120 has its edge perpendicular to the plane S, and the edge 116 of the opening 115 comprises two sections which make the same small angle with the perpendicular to the plane S and which connect to the plane S. It is the same for the bottom of the groove 117 and the recess 118 which is closed at its two ends by walls .

It is clear that, in FIG. 5, the keeper 102 is placed on a left leaf, the hinges being on the left of the figure, as well as in FIGS. 1 a and 1 b. To use the keeper 102 on a right leaf, simply turn it over so that the tongue 121 is on the left of the opening 115.

This embodiment therefore allows an advantageous reduction in the number of parts to be manufactured and stored.

The embodiment shown in FIG. 7 is particularly suitable when it is desired to use metals as constituents of the various elements. In this embodiment, the stop arm 205 has at its free end a lumen 210 and the keeper 202 has on one at least of its sides a stud 215 which engages in the lumen 210 when coming into contact. from the end of the stop arm with the keeper.

In the embodiment of FIG. 7, the keeper has at least one, preferably two studs 215 and thus has a plane of symmetry as was the case for keeper 102 in FIG. 5.

The keeper shown in Figure 8 is of the same type as that of Figure 7 but it is provided with a locking device and has no plane of symmetry.

Clearly seen in Figure 8 the substantially trapezoidal shape of the stud 215. The part 220 carrying the tongue 221 is pivotally mounted on an axis 224 and recalled by a spring 225 mounted around the axis 224 and bearing on the upper wall of the keeper by a part 226 opposite to that in contact with the tongue. This axis is carried by the wings of a U-shaped piece 227 resting on the bottom 228 of the keeper. This part 227 can be moved towards the stud 215, before the screws 222 are tightened, for adjusting the operating clearance.

There is a locking device comprising a bolt 230, actuated by a bolt 231, which can advance under the tongue 221 to prevent its bending. It is thus possible, once the engagement of the strike on the stop arm has been made, to close the lock. The window is then locked in its ajar position. Such an arrangement would be useful, for example in schools where children should not be able to close or open the windows themselves.

It should be noted that, in all of the embodiments described, the device is installed either on horizontal crosspieces or on vertical uprights. In addition, it occupies a very small width and can be placed on very narrow profiles. The relatively large clearance which may exist between the base and the keeper also facilitates the positioning of the fixing screws.

On the other hand, instead of the latching mechanism described here, a magnetic system or other equivalent system could be used.

Claims (11)

1. Window casement stay comprising a stop arm (5, 105, 205) connected by one end (7) to the fixed frame and a holding element (2, 102, 202) fixed to the leaf, the stop arm (5, 105, 205) being able to cooperate with said holding element (2, 102, 202) to immobilise the leaf in a determined open position, characterised in that the stop arm (5, 105, 205) is mounted to pivot with respect to the fixed frame along an axis oblique with respect to the perpendicular to the plan of join defined between the leaf and the fixed frame in the zone of the casement stay, the arm (5, 105, 205) being at rest substantially parallel to the plane of join, and the free end (6) of the stop arm (5, 105, 205) and said holding element (2, 102, 202) are arranged so that, the stop arm (5, 105, 205) having been previously moved away from its rest position, the opening of the leaf provokes engagement with blockage of said holding element (2, 102, 202) on the free end (6) of the stop arm (5, 105, 205) and immobilisation of the latter.

2. Casement stay according to claim 1, characterised in that the holding element fixed to the leaf is a notch (2, 102) presenting an opening (15, 115) partly closed on one side by a flexible tongue (21, 121) which retracts upon entry into contact of the notch (2, 102, 202) and the free end (6) of the stop arm (5, 105) to allow engagement of means (17, 18, 10, 11, 10', 11', 117, 118, 110) provided respectively on the notch (2, 102) and on the free end (6) of the stop arm (5, 105), the tongue (21, 121), after having taken up its initial position again, then maintaining engagement with blockage of said means.

3. Casement stay according to claim 2, characterised in that the notch (2, 102) comprises on the side of said opening (15, 115) opposite the tongue (21, 121) a groove (17, 117) adapted to receive a rib (10, 10', 110) formed on the free end (6) of the stop arm (5, 105).

4. Casement stay according to claim 3, characterised in that said rib (10. 10', 110) is extended by a bent element (11, 11') directed towards the free end of the arm (5, 105), which penetrates, during engagement of the end (6) of the stop arm (5, 105) in the notch (2, 102), in a cavity (18, 118) of corresponding shape which extends from said groove (17, 117) and which is closed on the side of the plane of join.

5. Casement stay according to claim 2, characterised in that the notch (202) comprises a lug (215) designed to penetrate in an opening (210) formed in the free end of the stop arm (205).

6. Casement stay according to one of claims 2 to 5, characterised in that the tongue (21, 121, 221) is fast with an outside portion located in the vicinity of the part of the end of the stop arm (5, 105, 205) which projects beyond the notch (2, 102, 202) when immobilisation is effected.

7. Casement stay according to one of claims 1 to 6, characterised in that the pivot axis of the stop arm (5, 205) and said perpendicular to the plane of join define a plane substantially parallel to the leaf and to the fixed frame.

8. Casement stay according to one of claims 1 to 6, characterised in that the pivot axis of the stop arm (105) and said perpendicular to the plane of join define a plane substantially at right angles to the leaf and to the fixed frame.

9. Casement stay according to claim 8, characterised in that the stop arm (105) is pivotally mounted on a base (103) of substantially triangular section.

10. Casement stay according to one of claims 8 and 9, characterised in that the notch (102) presents a plane of symmetry parallel to the plane of join.

11. Casement stay according to one of claims 1 to 9, characterised in that a bolt (230) actuated by a lock (231) may advance beneath the tongue (221) to prohibit bending thereof.

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