EP0499708B1 - Releasable assembly device of a stay with a link arm - Google Patents

Abstract

So that the articulated connection between a swivel arm (9) and an auxiliary link (12) can be made easily, but also released easily, the bearing bolt (10) on the swivel arm (9) is equipped with a circumferential groove (14), and its free end is chamfered (15). Moreover, two blocking jaws (17, 18) are held pivotably and/or bendably on the auxiliary link (12) and project with inner regions (20) and (21) into the range of movement of the bearing bolt (10). When the bearing bolt (10) is being inserted into the bearing bore (11), the two blocking jaws (17, 18) shift sideways in opposite directions. As soon as the circumferential groove (14) has come into the pivoting range of the blocking jaws (17, 18), these can spring back and enter the groove with a blocking effect. A manual release of this blocking device is possible if the free blocking-jaw ends are connected to, especially made in one piece with, a shackle-like actuating member (33) which can be pressed down resiliently. <IMAGE>

Description

The invention relates to a scissor stay of an at least tiltable sash of a window, a door or the like. With an extension arm and an auxiliary link and with a detachable connection of the extension arm with an auxiliary link, the extension arm on the wing and on a fixed frame in each case at least can be rotatably supported and the auxiliary link can be pivoted to the wing and to the extension arm, the extension arm-side bearing of the auxiliary link also consisting of a bearing pin attached to the extension arm and a bearing bore of the auxiliary link. These features are known from the closest prior art DE-A-2 044 178. The extension arm usually secures and limits the tilting movement of an at least tiltable wing.

If the sash can also be rotated, it can be locked in relation to the sash in the closed position. An auxiliary link is often linked to the extension arm to widen the support base. It is rotatably supported on one side at the top of the wing and on the other hand at a predetermined location between the two bearing points of the extension arm on the wing on the one hand and on the fixed frame on the other. Usually one of the articulation points of the extension arm, for example the wing-side, can be rotated and pushed. In addition, the leaf-side bearing points of the extension arm and the auxiliary link are usually attached to a so-called scissor stay cover that covers a drive rod for switching over the fitting or for locking the leaf in the closed position. If the arm is pivoted and slidable on the wing side, a simple pivot bearing on the fixed frame is sufficient.

E.g. in the case of a rotating and tilting fitting, the extension arm can be detachably mounted on the fixed frame, while its wing-side end can then be rotated and pushed and, as a rule, also releasably, in particular on the scissor cuff mentioned. The auxiliary link is usually only rotatably but not releasably held on the wing.

Concerning. The rotatable connection between the extension arm and the auxiliary link has different requirements for the manufacturers of windows and doors. These arise on the one hand from the manufacturing process during manufacture and on the other hand from different habits when transporting the window or door to the construction site.

Some of the manufacturers require that both the extension arm and the auxiliary link cannot be detached from the wing or scissor stay. This is important if the sash and frame are manufactured completely separately from each other and are only brought together at the end of the assembly line. The scissors consisting of the extension arm and auxiliary link are then on the wing and must not come loose during internal transport or during transport to the construction site. However, this is only guaranteed if the connection between the extension arm and the auxiliary link cannot be released by itself. One way to achieve this is to rotatably rivet the auxiliary link on the extension arm.

Other manufacturers are bothered if the extension arm is relatively loose on the scissor stay with the sash not attached. You prefer to attach the extension arm to the frame. At the construction site, possibly even in the workshop, it should then be possible to establish the connection between the auxiliary link and the extension arm. For this purpose, you can insert a bearing pin on the extension arm into a bearing hole in the auxiliary link and possibly secure this connection in a known manner.

It is now the task of developing a generic device in such a way that the wishes of both sides can be met, i.e. to create a connection between auxiliary link and extension arm, which ensures a secure connection, is easy to remove and inexpensive to manufacture. In addition, this device is intended to meet the special problems of mass production with the manufacturing tolerances inevitable there.

To achieve this object, it is proposed according to the invention that the device according to the preamble of claim 1 is characterized in that the auxiliary link is a locking device with two each pivotable and / or bendable against a restoring force into an ineffective position, in its locked position in a Has circumferential groove of the protruding beyond the bearing bore end engaging locking jaws, and that in the area of the free ends of the locking jaws a bracket-shaped, spring-elastic spreadable actuator is attached. Due to this detachable connection of the extension arm and auxiliary link, the extension arm can be detached from the fixed frame in the former case and the opening scissors can be left on the wing during transport.

In the second case, the connection between the extension arm and the auxiliary link - if necessary before installation - is simply released. You can then extend the extension arm during the Hold transports on a fixed frame. The auxiliary link remains on the wing.

The connection between the extension arm and the auxiliary link can be made quickly and easily by simply inserting the bolt on the extension arm into the bearing hole on the auxiliary link. On the one hand, the device according to the invention allows this quick and easy plugging together and on the other hand it ensures the immediate securing of the bolt in the bearing bore. By means of the insertion movement of the bearing pin, the locking jaws projecting into the range of movement of the latter are pressed to the side by the bearing pin in a spring-elastic manner. When the bearing pin is fully inserted, its circumferential groove is located exactly in the pivoting plane of the locking jaws, so that they can enter the annular groove under the influence of the spring force. The bearing pin can no longer be pulled out of the bearing bore. However, if you want to release this connection at a later point in time, all you need to do is transfer the locking jaws to their ineffective position while simultaneously generating or increasing the restoring force. If you hold them in this position, the bearing pin can be easily pulled out of the bearing bore. Because the spring-elastically expandable actuating member is connected to the free ends of the locking jaws, the actuating member is spread apart, for example by pressure on the back of the bracket Divergence of the locking jaw side bracket ends and thus also a divergence of the two locking jaws or locking jaw ends into their ineffective position. Because the bow-shaped actuating member is resilient, it automatically returns to its original shape after the actuating force ceases and thereby brings the two locking jaws back into their locking position.

A very advantageous embodiment of this device is characterized in that the actuator is made in one piece with the locking jaws and the connection points are located in particular on the outer flanks of the locking jaws. This provides a particularly broad basis for the actuating member and thus particularly favorable leverage ratios.

The actuating member preferably has a reduced thickness at the transition into the locking jaws. This creates articulated connections in these areas, which facilitate operation. Otherwise, the actuating member is a web standing upright with respect to the level of the auxiliary link, the height of which approximately corresponds to the thickness of the auxiliary link or slightly exceeds it.

In order to further improve the elasticity and the actuation, the actuating member additionally has a reduced thickness, in particular approximately in the middle of the bracket. It Another central joint is created at this point.

In a further embodiment of the invention, the two locking jaws are connected to one another at their end facing away from the actuating member by means of a connecting web. Together with the connecting web, they therefore form an approximately U-shaped, in particular quite flat component. As a result, there are no special measures to be taken when articulating on a scissor stay in order to create the necessary space.

The locking jaws, the connecting web and the actuator are advantageously made in one piece from plastic. This part can be produced at a very low cost and quite precisely as an injection molded part, the joints mentioned being able to be molded at the same time.

A preferred embodiment of the invention is characterized in that each locking jaw has at its end region facing the connecting web a transversely to its plane, in particular molded mounting pin which is rotatably held in a mounting hole of the auxiliary link. You can either press the pin into the hole or push it in and then expand it plastically. It is also conceivable to form a rivet head on the free end of the spigot after insertion.

Another embodiment of the invention results from claim 8. The fastening hooks mentioned there accelerate the precise attachment to the auxiliary link and, of course, they also contribute to the secure holding onto the latter. However, because they move apart when the actuating member is depressed and they thereby run an approximately circular path around their associated fastening pin, the left and right end region of the auxiliary link is designed to be correspondingly curved. This then ensures that the fastening hooks always grip this free end of the auxiliary link equally well. The height of the actuating member, measured transversely to the level of the auxiliary link, expediently corresponds approximately to the thickness of the latter plus the locking jaw thickness. In this way, despite the relatively thin-walled locking jaws, a strong actuating member is obtained.

The outer surfaces of the mounting jaws also expediently form a stop for the pressed-in actuating member. It prevents the actuator from being pressed over the horizontal. This ensures the spring back.

A particularly preferred variant of the invention is described in claim 10. The connecting web assumes the function of a connecting flap articulated at both ends between the ends of the two locking jaws facing away from the actuating member. Due to the inclination, one is the same strong and simultaneous spreading apart and closing the locking jaws guaranteed.

Further refinements of this device and the advantages resulting therefrom result from the following description of an exemplary embodiment.

Figur 1

eine Schrägbilddarstellung der Ausstellschere vor dem Ankuppeln des Ausstellarms am Hilfslenker und einem Scherenstulp des Flügels;

Figur 2

eine Seitenansicht des Ausstellarms und Hilfslenkers mit der Vorrichtung;

Figur 3

eine Draufsicht auf die dem Ausstellarm zugekehrte Seite des Hilfslenkers;

Figur 4

eine Draufsicht auf die Gegenseite.

The invention is explained below with reference to the drawing. The drawing includes an embodiment. They represent:

Figure 1

an oblique view of the stay scissors before coupling the stay arm to the auxiliary link and a scissor cuff of the wing;

Figure 2

a side view of the boom and auxiliary link with the device;

Figure 3

a plan view of the side of the auxiliary arm facing the extension arm;

Figure 4

a top view of the opposite side.

At the upper end of a wing, not shown, of a window, a door or the like. a drive rod 1 is slidably mounted in the sense of the double arrow 2. With their help, the Fitting, for example, can be switched from locking to tilting and possibly also to turning. When locking, locking members 3 interact with strikers, not shown, on the fixed frame. The drive rod 1 is covered by a so-called scissor cuff 4. If necessary, it is provided with through slots, mounting holes and molded projections. A keyhole-like longitudinal slot 5 is located at such an elevation. The thickened head 6 of a bearing bolt 7 can be inserted into the extended part 8 at the wing-side end 8 of a deployment arm 9. The shaft of the bearing pin 7 can then be rotated and pushed in the elongated narrow slot part. The other end of the extension arm 9, not shown, is at least rotatably mounted on a fixed frame. A bearing pin 10 is located between these two bearings. It extends in the same direction as the bearing pin 7 and can be inserted into a bearing bore 11 of an auxiliary link 12. The wing-side end of the auxiliary link 12 is rotatably mounted on the wing or on the scissor stay plate 4. The bearing axis 13 is associated with a further elevation of the scissors cuff 4.

The rotatable bearing connections of the extension arm 9 are both detachable. In addition, the bearing connection between the extension arm 9 and the auxiliary link 12 is to be released in the manner described below. For this purpose, there is a circumferential groove 14 on the bearing pin 10 provide the free end of the bearing pin 10 with a chamfer 15.

Two parallel locking jaws 17 and 18 lie flat on the underside 16 of the auxiliary link 12 pointing away from the extension arm 9. In the exemplary embodiment, their inner ends are connected to one another by means of a connecting web 19, so that an approximately U-shaped structure is formed overall. In the normal position, the inner edges of the locking jaws 17 and 18 protrude according to FIG. 3 into the range of motion of the bearing pin 10. The inwardly projecting areas 20 and 21 have an approximately crescent-shaped shape.

Each locking jaw is rotatably held on the auxiliary link 12 by means of a molded-on fastening pin 22 or 23 projecting transversely to its plane, each pin engaging in a fastening hole 24 or 25. The secure connection can be established in a known manner.

While the two fastening pins 22 and 23 are located on the inner region, that is to say close to the connecting web 19, a fastening hook 26 and 27 is attached, in particular molded, to the outer end region of each locking jaw. Each engages around the associated end edge 28 or 29. These end edges are designed in an arc shape, the center of curvature coinciding approximately with the geometric axis of the fastening pins 22 and 23, respectively. As a result, it is always the same Gripping is also ensured when the fastening hooks 26 and 27 move in the direction of arrows 30 and 31 from the inside to the outside.

To a certain extent, this already indicates that each locking jaw 17 or 18 can be pivoted or bent out about its fastening pins 23 or 24. If the bearing pin 10 in FIG. 1 is inserted into the bearing bore 11 from above in the direction of the arrow 32, it presses the crescent-like regions 20 and 21 of the locking jaws 17 and 18 in the direction of the arrows 30 and 18 when exiting this bore. 31 to the side. This is particularly easy because of the chamfer 15. As soon as the circumferential groove 14 has arrived in the plane of movement of the locking jaws 17 and 18, their regions 20 and 21 can snap into the circumferential groove 14 with their elasticity. As a result, the bearing pin 10 is then held in the bearing bore 11 so that it cannot be lifted out.

In order to make it possible to dismantle the extension arm 9 from the auxiliary link 12, a bow-shaped, resiliently expandable actuating member 33 is attached, preferably molded, to the outer free ends of the locking jaws 17 and 18. The temple ends are preferably assigned to the outer flanks of the locking jaws, so that the widest possible bracket can be used. Nevertheless, neither the bracket nor the U-shaped unit consisting of locking jaws and connecting web 19 is above the outer contour of the auxiliary link 12 above. In the axial direction, however, the actuating member 33 projects because this is expedient for simple actuation. If one now acts on the actuating member 33 in the direction of the arrow 34 and thereby presses this bracket flat, this results in the locking jaws 17 and 18 spreading apart in the direction of the arrows 30 and 31. As a result, the regions 20 and 21 of the locking jaws then emerge from the circumferential groove 14 of the bearing bolt 10, so that the latter can be pulled out of the bearing bore 11.

The connection points at the transition 35 and 36 from the actuator 33 to the associated locking jaws 17 and 18 are designed as joints in that the thickness of the web-like locking jaw is reduced, for example, to half. Such a reduction in cross section is again carried out in the bracket means 37, so that a joint is also created there.

An imaginary longitudinal axis 38 of the connecting web 19 is shown in FIG. 4 by means of a dash-dotted line. It extends obliquely with respect to an imaginary vertical transverse axis which extends to the longitudinal axis 39 of the auxiliary link 12 and which can be symbolized, for example, by the edge 40 of the auxiliary link 12. Furthermore, it can be seen from FIG. 4 that the longitudinal axis 38 runs as it were behind the fastening pin 22 and in front of the fastening pin 23. This creates an oblique connection, which is like a two-ended connection hinged tab acts and ensures the uniform opening and closing of the locking device.

Claims (12)

1. A stay scissor assembly of an at least tiltable leaf portion of a window, a door or the like, having a stay arm and an auxiliary link and with a releasable connection of the stay arm (9) to the auxiliary link (12), wherein the stay arm (1) can be at least rotatably mounted to the leaf portion and to a fixed frame respectively and the auxiliary link (12) can be rotatably connected to the leaf portion and to the stay arm (9), wherein in addition the mounting of the auxiliary link (12) at the stay arm end comprises a mounting pin (10) which is carried on the stay arm (9) and a mounting bore (11) in the auxiliary link (12), characterised in that the auxiliary link (12) has a locking device with two locking jaws (17, 18) which are respectively pivotable and/or bendable against a return force into an inoperative position and which in their locking position engage into a peripheral groove (14) in the end of the mounting pin which projects beyond the mounting bore (11), and that disposed in the region of the free ends of the locking jaws (17, 18) is a loop-shaped, resiliently spreadable actuating member (33).
2. A stay scissor assembly according to claim 1 characterised in that the actuating member (33) is produced integrally with the locking jaws (17, 18) and the connecting locations (35, 36) are disposed in particular at the outside edges of the locking jaws (17, 18).
3. A stay scissor assembly according to claim 2 characterised in that the actuating member (33) is of a reduced thickness at the transition (35, 36) into the locking jaws (17, 18).
4. A stay scissor assembly according to claim 2 or claim 3 characterised in that the actuating member (33) is of a reduced thickness approximately in the middle of the loop configuration.
5. A stay scissor assembly according to one of the preceding claims characterised in that the two locking jaws (17, 18) are connected together by means of a connecting web (19) at their ends remote from the actuating member (33).
6. A stay scissor assembly according to claim 5 characterised in that the locking jaws (17, 18), the connecting web (19) and the actuating member (33) are integrally made from plastics material.
7. A stay scissor assembly according to claim 5 or claim 6 characterised in that at its end region which is towards the connecting web (19) each locking jaw (17, 18) has a fixing projection (22, 23) which projects transversely to its plane and which in particular is moulded thereon and which is held rotatably in a fixing bore (25, 26) in the auxiliary link (12).
8. A stay scissor assembly according to one of the preceding claims characterised in that disposed at the end of each locking jaw (17, 18) which is towards the actuating member is a fixing hook (26, 27) which embraces the end edge (28, 29) of the auxiliary link (12), that is towards the stay arm, and in particular the locking jaws (17, 18) are associated with the surface of the auxiliary link (12), that is remote from the stay arm (9), and that the end edge (28, 29) is convexly curved in the region of each fixing hook (26, 27).
9. A stay scissor assembly according to claim 8 characterised in that the outside surfaces of the fixing hooks (26, 27) at the same time form an abutment for the actuating member (33) when it is pressed in.
10. A stay scissor assembly according to one of claims 5 to 9 characterised in that the connecting web (19) extends inclinedly relative to a notional perpendicular transverse axis (40) with respect to the longitudinal axis (39) of the auxiliary link (12), wherein a notional longitudinal axis (38) of the connecting web (19) extends in front of the geometrical axis of the one fixing projection (23) and behind the geometrical axis of the other fixing projection (22).
11. A stay scissor assembly according to one of the preceding claims characterised in that the peripheral groove (14) of the mounting pin (10) is of a sharp-edged configuration and the free end of the mounting pin (10) is bevelled (15).
12. A stay scissor assembly according to one of the preceding claims characterised in that the locking jaws (18, 19) engage with a lunar crescent-like inner region (20, 21) into the peripheral groove (14) in the mounting pin (10).

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