EP0619410B1 - Fitting for a sliding wing with non-circular guide pin - Google Patents

Description

The invention relates to fittings for parallel adjustable, tiltable and - after parallel parking - sliding wing. The invention focuses particularly on the design of a guide or functional plate which has a control or guide slot in which a guide pin is slidably held.

Such a fitting is also proposed with DE 32 34 677 C2. A fitting is also explained there, which can be used to deploy a horizontally displaceable sash in parallel by means of deployment arms, which is achieved with lower deployment arms. A locking member is provided on the lower extension arms, which slides in a sliding slot with slot arms. The sliding slot consists of a longitudinal slot arm and a locking receptacle arm oriented at an angle of approximately 60 °, in which the locking element engages in the parallel-adjusted position of the wing. The locking member is designed as a round bolt and can be moved along the entire control slot in this. The fitting described has a considerable depth, so that in the closed state of the parallel-adjustable wing, the carriage protrudes noticeably from the wing plane (cf. the transverse section of FIG. 2 there). The aim of the invention is to reduce this height .

It solves this problem with the technical teaching explained below, the essential features of which claim 1 shows. The invention is based on the fact that in order to achieve a reduced overall height, it is necessary to leave the rotational symmetry of the symmetrical and well-functioning guide pin in the StdT. It suggests that this guide pin should no longer be rotationally symmetrical, but non-circular, for example only axisymmetric. In a special design, the guide pin can have two flat sides and have slightly convex outer curvature on the remaining sides (claim 2). This axisymmetric guide pin reached it is essential that the width of the guide plate can be reduced, because the control slot to be provided in this guide plate can now be made narrower in accordance with the narrower shape of the guide pin. After the above-mentioned guide pin not only shifts longitudinally in the control slot, but also rotates slightly in the event of a parallel movement of the wing mentioned - in the case of a deployment movement of the deployment arm and control arm of the fitting, a special shape of the control slot is provided. The end of the control slot, to which the guide pin reaches when the wing is placed in parallel, is chamfered to this end; there it has a transfer bevel, which is arranged opposite a fixing recess (claim 1). This transfer bevel enables the desired path guidance of the guide pin, which is no longer rotationally symmetrical, in accordance with the deployment movement of the control arm and deployment arm. With this bevel, the guide pin is guided in its longitudinal / rotary movement in the control slot so that it slides into the fixing recess and can be fixed there with a nose projection. The fixing recess has a dimension that allows the guide pin to be fixed in the front end of the guide slot with its convex curvatures - those sides that are not flat sides. The guide pin slides along the transfer bevel and over the nose projection into the fixing recess (claim 3). The fixing recess can have a depth which allows the guide pin to introduce its entire transverse extent - from flat side to flat side - into the fixing recess. The guide pin is thus fixed or held in the wing position in the parallel position at the front end (4a) of the guide slot, so that the wing can be easily moved with the carriage in the open position.

Surprisingly, it has been found that the combination of no longer rotationally symmetrical (no longer round) guide pin and the elongated guide slot with transfer bevel increase the operational reliability of the mentioned parallel-adjustable wing results.

A more concrete design of this more reliable fitting with its reduced overall depth results if the distance between the flat sides of the guide pin and the mutual alignment and spacing of transfer bevel and nose projection are coordinated with one another (claim 4), in such a way that the center plane of the guide pin matches the nose projection has already exceeded when the guide pin leaves or has (just) left the transfer bevel - in the direction of the fixing recess. The center plane of the guide pin is the plane that is arranged in the middle between its two flat sides (fictitious). It also contains the longitudinal axis of the pin. Transversely to it - that is perpendicular to the flat sides - the pin transverse axis is oriented, about which the depth of the fixing recess was concerned (claim 3), specifically that the fixing recess in the transverse direction of the pin is just so deep that the entire guide pin finds space in it.

At the opposite end of the control slot - where the guide pin comes to rest when the extension arm and control arm of the fitting are pivoted in and the sash is in the closed position - the guide slot has a width which corresponds to the expansion of the guide pin in the transverse direction of the pin corresponds to or is slightly larger. Starting from the front end, at which the fixing recess and the transfer bevel lie opposite it, the guide slot tapers to a width that is based on the transverse dimensions of the guide pin.

When speaking within the scope of this invention of guide pins, the invention means no round guide pins or rotationally symmetrical bolts; Rather, it is the philosophy of the invention to give these guide pins a no longer rotationally symmetrical shape, for example the selected axially symmetrical shape (symmetrical with respect to the mentioned longitudinal axis and Transverse axis). Only with this shape of the guide pin - different dimensions in the two axes of symmetry mentioned - can the success according to the invention be achieved that the fitting projects as little as possible towards the interior (reduced overall depth). This is also particularly aesthetically pleasing, since modern windows and sashes are to show only a few structural elements that are attached uncovered to the support bars of the window walls. However, if it cannot be avoided that uncovered carriages must be present, at least the reduced overall height creates a considerable aesthetic improvement, since a carriage that protrudes only slightly stands out less visually due to the narrower guide plate than a clearly protruding carriage construction, as it does DE 32 34 677 C2 mentioned can be seen.

Operational safety also goes hand in hand with the reduction in overall height according to the invention, since the load-bearing capacity of the less protruding arm can be increased. The trunnion, which carries the parallel-adjustable sliding sash at the inside end of the extension arm, comes as close as possible to the sash frame or the center of the window sash.

For the reduced height, more reliable and more aesthetically pleasing design of the fitting for parallel-adjustable sash (claims 1 to 5), a supplement can be provided, which consists of a compression spring which is arranged on the extension arm (claim 6). It cooperates with a rear stop of the control arm, on which the guide pin explained is arranged; this rear stop resiliently strikes the compression spring in the wing parallel position when the guide pin comes into the fixing recess (claim 6); this is the open position of the wing, in which it can be moved in parallel with the carriage. The wing remains in this open position because the spring holds the control arm in the fixing or latching position. The spring also supports this latching movement. The non-circular guide pin 2 can then only against the resistance of the spring slide out of the fixing recess (snap-in). The spring can be interchangeably mounted in the extension arm (claim 7), which makes it possible to easily replace it if it breaks.

Although the mentioned patent specification (DE 32 34 677 C2) also already shows a spreading spring which is arranged between the control arm and the raising arm and prestresses the control arm in the direction of its latching movement in the latching slot arm. However, this spreading spring is constantly under tension, so that it is exposed to an increased risk of breakage. Not so the compression spring according to the invention, which cooperates with the rear stop of the control arm, wherein it is itself mounted in the extension arm. It is only subjected to a greater load when the wing placed in parallel reaches its open position, in all other operating positions of the wing it is relieved or only slightly loaded in the open position itself.

The understanding of the invention is deepened and expanded below using an exemplary embodiment.

Figure 1 is a plan view of a carriage, with a guide plate 5, which has a control slot 4 (right side). Roles are shown in dashed lines. An extension arm 10 is shown articulated on the carriage and a control arm 6 is shown articulated on it.

FIG. 2 deepens a detailed aspect of FIG. 1 by showing the axially symmetrical, non-circular guide pin 2 between transfer bevel 1 and locking edge 3a (fixing lug) in its movement sequence from the elongated part of the control slot 4 into the fixing recess 3.

Figure 3 shows a section transverse to the wing plane, in which the carriage 101 is recognizable on the lower spar of the wing frame. The closed and open sash positions are also shown, in which the guide pin 2 is fixed or locked in the fixing recess 3 (cf. FIG. 1). The reduced overall height can be seen from the distance L between the vertical central axis of the wing 100 in the closed position and the central axis of the support pin 7, which rotatably connects the wing 100 to the extension arm 10.

Figure 4 explains this opening position in more detail with a view of the parked wing with carriage. Here too, the support pin 7 can be seen, as well as the latched guide pin 2 in the fixing recess 3 of the guide plate 5. FIGS. 4a and 4b explain the striking of a rear end 9 of the control arm 6 on a spring 8, which is removably mounted in the extension arm 10. This resilient end stop holds the control arm in its locked position, so that the wing remains fixed in the parallel parking end position.

FIG. 5 deepens this aspect by showing an angular position of control arm 6 and extension arm 10, which is present shortly before this parallel parking end position is reached.

FIG. 1 shows a top view of a carriage 101 with which a wing 100 which can be set down in parallel (cf. FIG. 3 or FIG. 4) can be moved in parallel. On the carriage 101, a guide plate 5 is provided on the right side, which has an elongated control slot 4 with a front end 4a and a rear end 4b. A guide pin 2 is slidably mounted in the guide slot 4 and has two flat sides 2a, 2b (cf. FIG. 2). The two flat sides of the guide pin 2 are connected via 2 convex, outwardly directed curvatures 2c, 2d. At a distance from the front end 4a of the control slot 4, an extension arm 10 is articulated on the carriage 101. A control arm 6 is articulated on the extension arm 10, spaced apart from the aforementioned joint, which carries the mentioned guide pin 2 at its end, which is opposite the latter joint.

A parallel movement of the wing 100 now causes the scissors to pivot out of the extension arm 10 and control arm 6, the guide pin 2 sliding out of the rear end 4b of the control slot and being displaced in the direction of the front end 4a. Shortly before reaching the front end, it is deflected by a transfer bevel 1 and receives a movement path 21 which forces it into the fixing recess 3, which is arranged behind a locking edge 3a. The control slot thus widens from its rear end 4b to the front fixing recess 3 at the front end 4a. In this fixing recess 3 - between the front end 4a and the locking edge 3a (fixing nose) - the guide pin 2 finds a secure hold; the wing 100 parked in parallel can now be moved parallel to the carriage 101 - without the risk of folding back.

Figure 2 shows the guide pin 2 with its two flat sides 2a, 2b. The curved sides 2c, 2d can have a semicircular shape. They can also have a reduced, less bulge. The guide pin with the two flat sides can be formed from a bolt which has been deformed on both sides by pressing force. For the alignment and arrangement of the Transfer bevel 1 and the detent edge or detent 3a, the dimensions of the guide pin 2 are important. The most reliable solution is obtained when the central axis 2L (between the two flat sides 2a, 2b) has just exceeded the locking edge 3a - or the locking nose axis 3b - when the curved side 2c of the guide pin 2 leaves the transfer bevel 1. Then the guide pin 2 is located in the safe intake area of the fixing recess 3, into which it should pass without falling back into the elongated part of the control slot 4.

The path that the non-circular guide pin 2 takes is determined by the slope 1 and its slight rotary movement when the control arm 6 is raised. It is shown in dashed lines with the arrow 21. Since both the locking lug 3a and the edge surface 2d of the guide pin sliding over it are curved towards one another, this supports the latching function of the guide pin 2 in the fixing recess 3. The likewise curved surface 2c - compared to the surface 2d just mentioned - allows a smooth and smooth sliding of the non-circular guide pin 2 along the transfer bevel 1.

Figure 3 deepens the structural design of Figures 1 and 4 by showing a section BB, transverse to the control slot 4 in the guide plate 5. The sash is shown once in the closed position - on the frame - and parallel to it in the open, parallel open position. The control arm 10 is indicated. Also highlighted is the support pin 7 with which the sliding sash is pivotally arranged on the control arm 10. The distance L between the center axis of the guide pin 7 and the center of gravity of the window sash is markedly shortened due to the narrow control plate 5 compared to conventional fittings of this type. The reduction in the width of the plate 5 is made possible by the non-circular design of the guide pin 2. The reduction in the width is limited the guide plate 5 in that the guide pin 2 cannot be narrowed arbitrarily in its pin transverse direction 2a. He must have a minimum level of strength record what determines its dimensions. Thus, the plate - depending on the weight of the window sash that can be set in parallel - be kept as narrow as possible so that the support pin 7 of the extension arm 10 can be stored as close as possible to the sash frame or as close as possible to the window sash center of gravity. This increases the load-bearing capacity of the extension arm 10, since it only has to absorb reduced bending moments. Finally, this is also illustrated in FIG. 4, which in turn shows a top view of the carriage 101 - cf. 1 - but with the sliding sash 100 seated on the end of the extension arm 10.

FIG. 4 is also intended to clarify the engagement of the control arm when the wing 100 is parked in parallel by means of the section AA, which is shown in two open positions of the sliding wing 100 in FIGS. 4a and 4b.

For this purpose, a shaped spring 8 made of flat material is provided, which is interchangeably mounted in the extension arm 10. It acts together with a rear stop edge 9 on the control arm 6, and only in the open position of the sliding leaf 100. In all other positions between the fully open position and the closed position, the spring 8 is relieved. This is illustrated in FIG. 5, which shows a "nearly open position", namely a position of the wing 100 which can be set parallel, shortly before it reaches the final parallel setting.

FIG. 5 can be related to FIG. 4a, where the rear stop surface or edge 9 of the control arm 6 is just in front of the shaped spring 8. Shortly thereafter, the stop edge 9 comes to a stop at the upper protruding end of the spring 8 and supports the parallel fixing of the wing 100 placed in parallel in the final open position when the guide pin 2 slides completely into the fixing receptacle and the locking edge 3a in connection with the spring pressure prevents that the wing can now leave the open position again. The guide pin 2 can only be against the resistance of the shaped spring 8 unlatched again and the wing leaves its open position.

The spring 8 has an elongated bearing section, a bent retaining flange 8c and a protruding stop bracket 8b, 8d. The stop bracket 8b, 8d has an essentially S-shape; the lower curved end portion 8d comes to rest on the positioning arm. This S-bracket protrudes from the display arm 10, while the elongated holding section 8a, which is slightly bent or curved, comes to rest in an insertion slot of the display arm 10. The upper rounding of the S-bracket 8b and the length of the holding section 8a are formed so that the bent holding flange 8c can appear on the underside of the extension arm 10, so that the spring is latched into the opening arm. If the rear stop edge 9 of the control arm 6 abuts against the protruding S-bracket, the latter moves in the direction of the movement of the wing 100, as a result of which the slightly curved or kinked holding section 8a of the flat spring 8 is straightened and a spring force arises. This spring force can therefore only be applied when the sliding sash comes into its open position and the guide pin engages. Understandably, however, it is then also to be applied, however to a reduced extent, while the wing placed in parallel remains in this open position. The stress on the flat spring 8 will therefore be lower.

Should the load on the flat spring 8, which is already strongly reduced in this design compared to the prior art, cause this spring to break, this spring can be easily replaced due to the simple attachment in the slot 10a of the control arm 10. The slot 10a can have a pressure 10b to the outside so that it assumes a T-shape.

The location of the spring 8 was previously said that it is arranged in the raising arm 10, its exact location there depends on the shape of the control arm 6. In the exemplary embodiment - cf. for example Figure 4 - is a wishbone as Control arm 6 selected. The shape of the wishbone 6 is essentially isosceles, the two legs being much longer than the hypotenuse. The guide pin 2 is arranged at the corner point where the two elongated legs meet. At the corner where the hypotenuse meets the leg remote from the fitting, a pivot bearing 11 is provided, which connects the raising arm 10 to the control arm 6 in an articulated manner. The location of the spring is then at the remaining corner of the elongated equilateral triangle, where the hypotenuse meets the leg near the window. Here, the rear stop surface 9 is also provided, which is formed by a section of the hypotenuse.

It has been mentioned that the guide pin 2 has a pin longitudinal axis 21 and a pin transverse axis 2q (see FIG. 2). These two axes are perpendicular to each other. It has also been shown that the guide pin can be designed as a non-circular round bolt, whereby it receives two flat sides 2a and 2b which come to lie parallel to the longitudinal axis 21 of the pin. The asymmetry in the longitudinal and transverse directions is therefore essential for the shape of the non-circular pin. If pins in the prior art regularly have a round bolt shape, the intention of the invention is precisely to avoid this rotational symmetry. It should therefore be emphasized that the invention uses a guide pin which is asymmetrical in the longitudinal and transverse directions shown, and is therefore out of round. The invention does not mean a shape other than the non-round in the longitudinal and transverse direction asymmetrical when it speaks of the non-round guide pin.

Claims (7)

1. A fitting for a tiltable, moveable panel (100) which can be immobilised in parallel position, characterised in that

   (a) a guide plate (5) disposed on a carriage (101) has a guide slot (4) in which a rotationally asymmetrical, especially axially asymmetrical, non-round guide pin (2) is slidably held, and

   (b) the guide slot (4) is elongate and at one end (4a) has a transitional slope (1) disposed opposite a fixing recess (3).
2. A fitting according to claim 1, wherein the guide pin (2) is flat on two sides (2a, 2b) and has a slightly convex external curvature on the remaining sides (2c, 2d).
3. A fitting according to claim 1 or 2, wherein the fixing recess (3) is dimensioned so that

   (a) the convex curved parts of the guide pin (2) can be fixed between the front end (4a) of the guide slot (4) and a nose or projection (3a) disposed opposite the transitional slope (1) and

   (b) in its transverse direction (2q) from one flat side (2a) to the opposite flat side (2b) the guide pin (2) can be received by the fixing recess (3), that is when the fitting is in the position where the panel is moved and immobilised in parallel position.
4. A fitting according to claim 2 or 3, wherein the distance between the flat sides (2a, 2b) of the guide pin (2) and the mutual alignment and spacing of the transitional slope (1) and the projection (3a) are adjusted to one another so that the centre plane (21) half way between the flat sides (2a, 2b) of the guide pin (2) has already passed the projection (3a) when the guide pin (2) leaves the transitional slope (1) in the direction towards the fixing recess (3).
5. A fitting according to any of claims 2 to 4, wherein the guide slot (4; 4a, 4b) at the rear end (4b) has a width approximately equal to the distance between the flat sides (2a, 2b) of the guide pin (2) (that is the transverse axis 2q of the pin) and widens in the direction towards the front end (4a) towards the transitional slope (1).
6. A fitting according to any of the preceding claims wherein

   (a) a pressure spring (8) is disposed on an extension arm (10) pivotably connected to the carriage (101), and

   (b) a rear abutment (9) is provided on a control arm (6) bearing the guide pin (2; 2a, 2b) and the pressure spring (8) resiliently abuts it (only) when the guide pin (2) reaches and remains in the fixing recess (3) (parallel immobilisation - open position - of the panel).
7. A fitting according to claim 6, wherein the spring (8) is interchangeably held in the extension arm (10).

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