EP1342877A2 - Corner connector - Google Patents

Abstract

The corner conneector is for connecting two hollow chamber profiles (1) mitered from weldable plastic for windows, doors or similar and is provided with a shaft part (6) and a disk part (8), which commonly in a hollow chamber profile can be displaced from the mitered side (2) in an introduction direction (X). The shaft part on its one end has an inclined surface (9) corresponding to the mitering (2) of the hollow chamber profile, together with side flanks (45) for location on inner surfaces of the hollow chamber profile (1,4). In one of the two side surfaces connecting the side flanks of the shaft part is a groove running in the introduction direction, in which the disk part locates and is displaceable oppositely to the introduction direction. On each of the two sides of the disk part or the shaft part, two lateral braceable components are provided.

Description

The invention relates to a corner connector for connecting two miter cut, weldable plastic hollow chamber profiles of windows, doors or the like., With a shaft part and a sliding part, which can be inserted together in a hollow chamber profile from the miter cut side in an insertion direction are, the shaft part at one end of an inclined surface corresponding to the miter of the hollow chamber profile and lateral flanks for contacting the inner surfaces of the hollow chamber profile and in one of the two side flanks connecting the side flanks of the shaft part has a groove running in the insertion direction, in which the sliding part is seated , which is displaceable in it relative to the shaft part at least against the direction of insertion and on its side facing the inclined surface of the shaft part an end section for applying a displacement force and anc enclosing basic body. The invention further relates to such a corner connector, in which in addition to the shaft part and the sliding part also an attachment part is provided, the sliding part being arranged between the shaft part and the attachment part and the attachment part not being movable relative to the shaft part in the longitudinal direction of the groove, and wherein Schaffteil, sliding part and top part can be inserted together in a hollow section from its miter-cut side in an insertion direction and the shaft part at one end an inclined surface corresponding to the miter of the hollow section and side flanks for contact with the inner surfaces of the hollow section and in one of its side Flank connecting side surface has a groove extending in the direction of insertion, in which the sliding part sits, which is displaceable in it at least against the insertion direction relative to the shaft part and on its side facing the inclined surface of the shaft part NEN end portion for applying a displacement force and a base body adjoining it in the insertion direction.

In a known corner connector (DE 100 39 403 C1), the sliding part accommodated in the groove provided at the top of the shaft part runs out at its front end section in the direction of insertion into one or two legs which can be expanded elastically and laterally, the shaft part having an expansion element for spreading the legs, with which they can be spread laterally when the sliding body is moved relative to the shaft part. The spreading distance of each leg increases as the displacement of the sliding body increases. In this known corner connector, the legs become elastic transversely to the insertion direction when the sliding body is moved relative to the shaft part against the insertion direction spread out and come to a wedging system against those sides of the hollow chamber profile, in which not as great a shape as is required for the areas that serve to accommodate glass panes or that are to be fitted into the door or window frames so that a good sealing effect is possible. However, the point at which the wedging effect occurs in the wedged state of the shaft part within the hollow chamber profile is relatively far from the miter surface, so that there is a comparatively long section of the shaft part between the wedging surface and the miter surface, which is the case with a miter surface on the miter surface, for , B. sometimes occurring during the welding process can lead to certain deflections that are undesirable.

Another corner connector is known from DE 37 12 478 C1 with a central continuous channel in its longitudinal direction, in the insertion-side end area of which a plurality of longitudinal grooves are provided. A long screw is passed through the longitudinal channel, which is screwed into an expansion block at the insertion-side end of the corner connector, which in turn is slowly pulled into the corner connector when the screw is tightened, and the areas of the corner connector formed between the longitudinal grooves face outwards towards the inside of the Hollow chamber profile spread. Although this known corner connector allows a somewhat shorter length for the shaft part which can be inserted into the hollow chamber profile, it is of a quite complicated, multi-part construction comprising plastic and metal parts, which is expensive. In addition, the assembly is difficult, since the pressure exerted by the user on the corner connector when the set screw is tightened, which acts in the direction of insertion of the corner connector, entails the risk of undesired migration of the corner connector into the hollow chamber profile. If the screw is pressed too hard, the previously achieved alignment between the miter surface of the hollow chamber profile and the inclined surface of the corner connector is lost, so that then welding or gluing of the inclined surfaces of two corner connectors fixed in this way in the miter surface of the hollow chamber profiles to be connected is no longer ensured.

The invention therefore aims to provide an improved corner connector that allows a short design of the shaft length that can be inserted into the hollow chamber profile as well as a wedging point that is significantly closer to the miter surface of the shaft part.

According to the invention, this is achieved on the one hand by a corner connector of the type mentioned at the outset, in which, as seen in the insertion direction, at least one expansion element which is laterally expandable transversely to the insertion direction is formed on at least one side of the sliding part or shaft part, which lies laterally next to the base body and at one Relative movement of the sliding part to the shaft part against the direction of insertion with a on the other part formed form element for lateral expansion comes into active engagement.

While in the known corner connector from DE 100 39 403 C1 the length of the sliding part from its end section for applying the displacement force, further the actual basic body adjoining it in the insertion direction and further from the length of the leg (s) adjoining its end ( s), the length of the sliding part in the corner connector according to the invention is determined only from the end section for applying the displacement force and the basic body itself adjoining it in the direction of insertion. This is because the length of the expansion element (s) which can be expanded laterally contributes to the total length of the Sliding part no longer because the spreading element (s) lie to the side of the base body. Overall, the width of the shaft part (with the sliding part accommodated at the top in the longitudinal groove) is not greater than in this known corner connector, since the total width is predetermined by the width of the insertion cross section on the hollow chamber profile.

As a result of this lateral arrangement of the spreading element (s) which can be expanded laterally, the locking location which occurs as a result of this (s) during spreading moves forward in comparison to the solution from DE 100 39 403 C1 against the direction of insertion, i. H. lies closer to the miter surface, which can be influenced by the special position of the first lateral expansion element following the end section of the sliding part.

On the other hand, the objective of the invention specified above is also achieved by a corner connector, as mentioned at the beginning in the second place, namely by a corner connector for connecting two miter-cut hollow chamber profiles of windows, doors or the like, consisting of weldable plastic, with a shaft part, a sliding part and also an attachment part, the sliding part being arranged between the shaft part and attachment part and the attachment part not being movable relative to the shaft part, and the shaft part, sliding part and attachment part being insertable together in a hollow chamber profile from its miter-cut side in an insertion direction are. The shaft part has at one end an inclined surface corresponding to the miter of the hollow chamber profile, as well as lateral flanks for contacting inner surfaces of the hollow chamber profile, and in one of the side surfaces connecting the lateral flanks of the shaft part a groove running in the insertion direction, in which the sliding part sits, that is at least displaceable in it relative to the shaft part against the insertion direction and has on its side facing the inclined surface of the shaft part an end section for applying a displacement force and a base body adjoining it in the insertion direction. Seen in the direction of insertion, at least on one side of Sliding part or attachment part is formed at least one spreading element which can be laterally expanded laterally to the insertion direction and which is offset laterally to the base body, i.e. laterally relative to this, and when the sliding part moves relative to the shaft part counter to the insertion direction with a shaped element formed on one of the other two parts to the side Spreading takes effect.

This second form of the corner connector according to the invention differs from the first essentially in that an attachment part is additionally provided and the spreading effect is applied not only in the interaction of the shaft part and the sliding part, but also in the interaction of the sliding part and the attachment part (in a completely analogous form ) can happen. Due to the fact that in the second embodiment of the invention the attachment part cannot be moved relative to the shaft part, i.e. there is a fixation to the shaft part in a suitable form, wedging in the case of a cooperation between the sliding part and the support part between these and the hollow chamber profile also leads accordingly firm seating of the shaft part in the hollow chamber profile.

The basic operating principles which are decisive for the construction principle according to the invention, namely the lateral jamming of the corner connector in the hollow chamber profile in the region of the basic body of the sliding part in the hollow body profile, caused by the displacement movement of the sliding part against the insertion direction, by expansion elements attached laterally from this basic body, is in both forms of the invention realized in exactly the same way, so that they both represent only different designs of the same inventive concept.

In both embodiments of the invention, an expandable expansion element is advantageously formed symmetrically to the center line of the groove on both sides of the sliding part or the shaft part or the attachment part, which allows improved introduction of the wedging force symmetrically on both sides of the shaft part into the respectively assigned side wall of the hollow chamber profile ,

It is very particularly preferred, likewise symmetrically to one another, to provide more than one expansion element on both sides of the sliding part and shaft part or attachment part, very particularly preferably two expansion elements which can be expanded laterally on each side. This makes it possible to achieve a wedging effect not only at one point, but at several points over the length of the shaft part, as a result of which the wedging effect in the hollow chamber profile becomes particularly strong and strong.

In the case of the invention, the spreading element (s) is / are advantageously attached to the sliding body, a shaped element being assigned to each spreading element on the shaft part or attachment part. Each expansion element is particularly preferably designed as a spring arm directed counter to the direction of insertion, the side of which facing the base body has an inclined surface which is inclined to the longitudinal direction of the groove, the side wall (or the side wall section lying next to it) of the groove in order to form the associated shaped element corresponding area with a recess and the end face of the groove side wall facing the miter surface of the shank part, which recess delimits this recess there, is provided with a bevel or a rounding substantially corresponding to the inclined surface of the facing spring arm.

In the second embodiment of the invention, to form the associated molded element, the attachment part can advantageously have a protruding part toward the base body, which essentially extends above its height and, when it is displaced, against the direction of insertion into the gap between the inclined surface and the side surface of the base body facing it be insertable projection provided, which spreads the spring arm when entering the gap.

These refinements are particularly structurally elegant and, overall, are also technically uncomplicated embodiments of the corner connector according to the invention, which are outstandingly effective and rapid wedging, particularly when using a tensioning tool for the sliding part, as described in DE 44 29 709 C1, allow with precise alignment of the miter surface of the shaft part to the miter surface of the hollow chamber profile.

In another preferred embodiment of the corner connector according to the invention, the molded element (s) is / are formed on the sliding part or on the top part. Each shaped element is suitably assigned a section on the corresponding side wall of the groove, which in turn is designed as a laterally expandable wall section of the shaft part. It is preferred that, corresponding to the end edge or end face of the expandable wall part, a recess is provided in this side wall of the groove, and on the side of the end face of the expandable wall section facing the base body, a bevel or rounding is formed for improved tarnishing or running-in of the assigned expansion element ,

In the second embodiment of the invention, each shaped element on the sliding part can also preferably be formed as a projection projecting towards the attachment part and the expansion element (s) on the attachment part are / are opposite to the insertion direction Directed (r) spring arm (s) is provided, each spring arm on its side lying towards the center of the attachment part has an inclined surface inclined to the longitudinal direction of the groove and the associated shaped element is designed and arranged such that it is in a displacement movement of the sliding part relative to the attachment part (and thus also relative to the shaft part) runs counter to the direction of insertion into the gap between the inclined surface and the side surface of the body of the attachment part facing it, with the spring element spread apart.

In all cases of the invention, the assignment of the spreading element and the shaped element for the lateral spreading of the spreading element is preferably designed in such a way that with the increasing displacement of the sliding part, the spreading element is increasingly spread out by the shaped element.

• Fig. 1 eine (teilweise geschnittene) Perspektivansicht (schräg von vorne) eines erfindungsgemäßen, in ein Hohlkammerprofil eingeschobenen Eckverbinders im noch nicht gespannten Zustand;
• Fig. 2 eine Draufsicht auf das Schaftteil des Eckverbinders aus Fig. 1;
• Fig. 3 eine Draufsicht auf das Schiebeteil des Eckverbinders aus Fig. 1;
• Fig. 4 eine der Darstellung der Fig. 1 entsprechende, teilweise geschnittene Perspektivansicht, wobei hier jedoch sich der Eckverbinder in seiner verkeilten Stellung befindet;
• Fig. 5 zwei Draufsichten auf den in das Hohlkammerprofil eingeschobenen Eckverbinder gemäß Fig. 1 zu einem (oben) in nicht-verkeilten sowie (darunter) in verkeilten Zustand;
• Fig. 6 eine (teilweise geschnittene) Perspektivdarstellung (ähnlich der aus Fig. 1) mit einem in ein Hohlkammerprofil eingeschobenen erfindungsgemäßen Eckverbinder einer zweiten Ausführungsform im nicht-verkeilten Zustand;
• Fig. 7 eine Draufsicht auf das Schaftteil des Eckverbinders aus Fig. 6;
• Fig. 8 eine Draufsicht auf das Schiebeteil des Eckverbinders aus Fig. 6;
• Fig. 9 eine teilweise geschnittene Perspektivdarstellung entsprechend Fig. 6, hier jedoch mit dem erfindungsgemäßen Eckverbinder in verkeiltem Zustand;
• Fig. 10 zwei prinzipielle Draufsichten auf den in das Hohlkammerprofil eingeschobenen Eckverbinder aus Fig. 6, zum einen im nicht-verkeilten Zustand (obere Darstellung) und zum anderen im verkeilten Zustand (untere Darstellung);
• Fig. 11 eine perspektivische (teilweise geschnittene) Darstellung eines erfindungsgemäßen Eckverbinders im verkeilten Zustand gemäß einer dritten Ausführungsform, bei dem neben dem Schaftteil und dem Schiebeteil auch noch ein über letzterem liegendes Aufsatzteil vorgesehen ist;
• Fig. 12 einen Längsschnitt durch den Eckverbinder aus Fig. 11 (gemäß Schnittlinien XII - XII in Fig. 13), und
• Fig. 13 eine Längsschnittdarstellung gemäß Schnittlinie XIII - XIII in Fig. 12.

The invention is explained in more detail below in principle by way of example with reference to the drawing. Show it:

• Figure 1 is a (partially cut) perspective view (obliquely from the front) of a corner connector according to the invention, inserted into a hollow chamber profile in the not yet tensioned state.
• FIG. 2 shows a plan view of the shaft part of the corner connector from FIG. 1;
• Fig. 3 is a plan view of the sliding part of the corner connector from Fig. 1;
• Fig. 4 is a perspective view corresponding to the representation of Fig. 1, partly in section, but here the corner connector is in its keyed position;
• FIG. 5 shows two top views of the corner connector according to FIG. 1 pushed into the hollow chamber profile to one (above) in the non-wedged and (below) in the wedged state;
• 6 shows a (partially cut) perspective view (similar to that from FIG. 1) with a corner connector according to the invention of a second embodiment inserted into a hollow chamber profile in the non-wedged state;
• FIG. 7 shows a plan view of the shaft part of the corner connector from FIG. 6;
• FIG. 8 is a plan view of the sliding part of the corner connector from FIG. 6;
• Fig. 9 is a partially sectioned perspective view corresponding to Figure 6, but here with the corner connector according to the invention in a wedged state.
• 10 shows two basic plan views of the corner connector from FIG. 6 pushed into the hollow chamber profile, on the one hand in the non-wedged state (upper illustration) and on the other hand in the wedged state (lower illustration);
• 11 shows a perspective (partially sectioned) representation of a corner connector according to the invention in the wedged state according to a third embodiment, in which in addition to the shaft part and the sliding part there is also an attachment part lying above the latter;
• FIG. 12 shows a longitudinal section through the corner connector from FIG. 11 (according to section lines XII - XII in FIG. 13), and
• 13 is a longitudinal sectional view according to section line XIII - XIII in FIG. 12.

1 to 5 show a first embodiment of a corner connector, in FIGS. 6 to 10 a second embodiment and in FIGS. 11 to 13 a third embodiment of a corner connector. The same reference numerals are used in the different figures for the same parts.

First of all, reference is made to FIGS. 1 to 5:

In Fig. 1 is a perspective oblique view, partially in section, an existing plastic hollow chamber profile 1 is shown as it is used for the production of window or door frames. This hollow chamber profile 1 has at its one end, shown on the left in FIGS. 1 and 4, an oblique miter surface 2 which, as can be seen from FIGS. 1 and 4, does not consist of a continuous surface but of the end cross sections of the individual, the hollow chamber profile 1 forming profile webs, which in their entirety form the inclined miter surface 2 and lie in one plane.

The miter surface is in turn inclined at an angle of 45 ° to the longitudinal axis of the hollow chamber profile 1.

In the hollow chamber profile 1, a molded channel is formed in the middle as an insertion channel 3, into which a corner connector can be inserted, which will be discussed further below.

In the insertion channel 3, a metal tube 4 corresponding to its shape is fixedly attached, which serves to reinforce this insertion channel 3 with a view to tightening the inserted corner connector. 1, the upper part of the insertion channel 3 and the metal tube 4 is cut off, the wall part of the metal tube 4 lying on the left in the insertion direction X as well as the wall of the hollow profile 1 lying against it being cut at a higher cutting level than on on the opposite side, the wall of the metal tube 4 there and the wall webs of the hollow chamber profile 1.

In Fig. 1, a corner connector, which is provided in its entirety with reference number 5, is inserted into the insertion channel 3.

This corner connector 5 consists of a shaft part 6 located at the bottom in FIGS. 1 and 4 (which is shown enlarged in a plan view in FIG. 2) and one in a receiving groove 7 (FIG. 2) on the top of the corner connector 5 in the longitudinal direction thereof arranged sliding part 8, which is illustrated in Fig. 3 in plan view, also enlarged. The _" top" and _" bottom" or _" top" and _" bottom" should always refer to the shorter (upper) and longer (bottom) side of the corner connector 5, which result from the miter.

The shaft part 6 is also made of plastic and has on its one (front) end, which is shown on the left in the figures, also an inclined surface 9 which is inclined in accordance with the miter of the hollow chamber profile 1, which in turn consists of a large number of smaller individual surfaces, as is particularly shown in 1 and 4 is clearly visible. With its side flank surfaces 45, the shaft part 6 lies laterally when it is inserted into the hollow chamber profile 1 (or into the metal tube 4 arranged therein).

The corner connector 5 inserted into the hollow section 1 is to be wedged in a position in the hollow section 1 or in the metal tube 4 in which its inclined surface 9 is in alignment with the miter surface 2 of the hollow section 1. The receiving groove 7 at the top of the corner connector 5, as can be seen from FIGS. 1, 2 and 4, is delimited on both sides by side walls 10, which result in lateral guidance of the inserted sliding part 8.

The sliding part 8, in turn, as shown in FIG. 3, consists of a base body 11 which is displaceably seated in the receiving groove 7 and is guided on its side surface by the side walls 10 of the shaft part 6. On its side opposite to the direction of insertion, this has an end section 12 which, as shown in FIG. 1, also protrudes forward from the hollow chamber profile 1 over the miter surface 2 and the inclined surface 9 of the corner connector 5 even when the corner connector 5 is inserted. At its protruding (front) end, the end section 12 is provided with a cross head 13, on which a suitable assembly tool (not shown) can engage in order to move the sliding part 8, when it is inserted into the hollow chamber profile 1, against the insertion direction relative to the shaft part 6 to move.

At the end section 12, near the end of the base body 11 facing it, a notch 14 is made at the top, which makes it possible at this point to separate the end section 12 with the cross head 13 from the base body 11 as soon as the wedged position of the inserted corner connector 5 is established.

On the sliding part 8, spring elements are formed laterally on the base body 11 in the form of spring arms 15 directed counter to the insertion direction X, that is to say towards the end section 12, namely on each side of the base body 11 two spring arms 15 which are arranged symmetrically to the longitudinal center plane of the sliding part 8 are.

The outer sides of the spring arms 15 facing away from the base body 11, in the relaxed, non-expanded state, as shown in FIG. 3, run essentially parallel to the respective side surface of the base body 11 and are each on their sides facing the base body 11 with a Longitudinal direction of the receiving groove 7 inclined (against the insertion direction X facing outward) inclined surface against which a shaped element formed on the shaft part 6 runs against a movement of the sliding part 8 relative to the shaft part 6 against the insertion direction X, whereby the spring arms 15 from the continued movement Base body 11 are spread outwards.

To form these shaped elements, recesses 16 are provided in the shaft part 6 (cf. FIG. 2) in the side walls of the receiving groove 7, which recesses 16, into which, as shown in FIGS. 1 and 4, the lateral spring elements 15 protrude. The boundary edges 17 of the recesses 16 lying in the direction of the inclined surface 9 of the shaft part 6 are provided on their respectively outwardly facing side with a chamfer 18, which serves as a leading edge for the respectively assigned spring arm 15 and the chamfering of the chamfer of the chamfer facing the base body 11 Corresponds to the inside of the spring arm 15 in question.

5, the metal tube 4 being cut in such a way that the top view of an otherwise uncut corner connector 5 is released.

The lower illustration from FIG. 5 now shows the position in which the sliding part 8 is displaced in its end position against the insertion direction X relative to the shaft part 6 and the spring elements 15 are brought outwards until they wedge against the facing inner surface of the metal tube 4.

The wedging position of the corner connector 5 shown in the lower illustration in FIG. 5 in the hollow chamber profile 1 or in the metal tube 4 mounted therein is also shown in the perspective illustration of FIG. 4 (also partially cut according to the sectional position in FIG. 1), wherein however, in the latter the protruding part of the end section 12 with the transverse head 13 at the location of the notch 14 has already been removed by knocking off.

If the corner connector 5 is inserted into the hollow chamber profile 1, the subsequent assembly is best carried out in the manner and with such a tool as z. B. is described in EP 1 179 652 A2. For this purpose, a traction tool (not shown), which can be hooked onto the cross head 13 of the end section 12, is used, which consists of a cylindrical base body with a radially protruding lever arm. The base body is placed across the inclined surface 9 (with its central axis essentially parallel to the bottom surface of the corner connector 5) and not only spans the inclined surface 9 of the sliding part 8, but also protrudes laterally on both sides onto the miter surface 2 of the hollow chamber profile 2 Support purposes. By rotating the base body of this tool, which is supported on the miter surface 2, the end section 12 is slowly pulled out of the hollow chamber profile 1 against the direction of insertion X. The sliding part 8 moves in the same direction and, as long as no wedging has taken place, the shaft part 6 also moves in this direction with it until its inclined surface 9 abuts against the facing edge of the cylindrical base part of the tool and thus also aligns with the miter surface 2. Further rotation of the assembly tool then means that the shaft part 6 cannot be moved further in this direction, while the sliding part 8 is now moved further in this direction relative to the shaft part 6. The spring element 15 runs against the assigned shapes 17, 18 on the side walls 10 of the shaft part 6 and is spread outwards until the desired fixed wedging is achieved. At the same time, the alignment of the inclined surface 9 to the miter surface 2 is always ensured.

When a sufficiently firm wedging fit of the corner connector 5 in the hollow chamber profile 1 is achieved, the protruding end section 12 with the cross head 13 is knocked off at the point of the notch 14 at the front, for example with the assembly tool, after which the assembly process is ended.

In the second exemplary embodiment according to FIGS. 6 to 10, the structural relationships are essentially the same as in the previous exemplary embodiment, with the exception that here the sliding part 8 and correspondingly also the side walls 10 of the shaft part 6 are designed in a different form:

FIG. 7 shows a top view of the shaft part 6 in this embodiment and FIG. 8 shows a top view of the sliding part 8, which is used here.

The sliding part 8 again has a base body 11 which is guided laterally on the inner surfaces of the side walls 10 of the shaft part 6 when the sliding part 8 is moved relative to the shaft part 6.

At the end of the base body 11 opposite the insertion direction X, an end section 12 in the form of an elongate web is in turn attached with a transverse head 13 at its projecting end. The notch 14 for knocking off the end section 12 after assembly is complete is again provided.

Shaped body 19 in the form of wedge-shaped side projections extending laterally from base body 11 in the direction of insertion X are now attached to base body 11 laterally on and next to it, specifically, analogously to the exemplary embodiment of FIGS. 1 to 5, two on each side and symmetrically to the longitudinal center plane the sliding part 8 arranged.

Correspondingly, recesses 16 are again provided in the side walls 10 of the shaft part 6, as shown in FIG. 7, the recesses 16 being elastic on the edges delimiting in the direction of insertion X at the rear as end edges of the respective side wall 10 formed in the outward direction Spreadable spring elements 15A are attached in the form of resilient fingers.

If the sliding part 8 is inserted into the receiving groove 7 of the shaft part 6, then the result arises as it z. B. in Fig. 6 and in particular in Fig. 10 (upper illustration), which shows the corner connector in its initial position, in which there is still no spreading of the spring elements 15A.

From the upper representation of FIG. 10 it can also be seen that the outer surface of the wedge-shaped side projections 19 abut the correspondingly inclined contact surfaces of the spring elements 15A and the projecting end edges of the wedge-shaped side projections 19 each protrude into the recesses 16 in the side walls 10. If, during assembly, the sliding part 8 is moved relative to the shaft part 6 against the direction of insertion X, then the wedge-shaped side projections 19 of the base body 11 spread outwards against the spring arms 15A formed in the side walls 10, as is shown in the lower illustration 10 is shown, whereby, with a corresponding displacement path of the sliding part 8 relative to the shaft part 6, there is an abutment against the facing sides of the metal tube 4 and then jamming there.

The lower illustration in FIG. 10, like the illustration in FIG. 9, shows this wedged final state, after the end section 12 having been reached is knocked off with the transverse head 13 at the notch 14:

A third embodiment of the corner connector according to the invention is illustrated in FIGS. 11 to 13.

In this embodiment, the corner connector 5 consists not only of the shaft part 6 and the sliding part 8, as in the two previously described embodiments, but also of a further part, an attachment part 22, which is also held above the sliding part 8, also shaft part 6 , so that the sliding part 12 is interposed between the attachment part 22 and the shaft part 6 (cf. FIG. 12).

The attachment part 22 sits on top of the shaft part 6 in a longitudinal groove 7, in which the sliding part 8 is also arranged below it. The side walls 10 of the longitudinal groove 7 form lateral brackets for the attachment part 22.

The attachment part 22 is mounted on top of the shaft part 6 in such a way that it is immovable in the longitudinal direction of the longitudinal groove 7, that is to say it cannot be moved relative to the shaft part 6 neither in the insertion direction X nor in the opposite direction. This is ensured by the fact that on the front of the shaft part 6, on which the inclined surface 9 is located, a front end plate 46 (see FIG. 12) of the shaft part 6 protrudes somewhat upwards beyond the other upper limit of the shaft part 6, so that As shown in FIG. 12, the attachment part 22 rests on its front against the back of the end plate 46 of the shaft part 6. In addition, a holding projection 24 (FIG. 12) is attached to the side surfaces of the side walls 10 facing the attachment part 22, which protrudes inwards and z. B. seen in the insertion direction X, in front of an intermediate wall 26 of the attachment part 22nd lies, so that movement of the attachment part 22 is prevented even in the insertion direction X.

Each retaining projection 24 is overlapped by a recess 28 running from the underside of the attachment part 22 in the associated side wall thereof, so that the attachment part 22 can be attached from above onto the shaft part 6 already provided with the sliding part 8, but there in the longitudinal direction the longitudinal groove 7, namely neither forwards nor backwards, is movable. Only an upward movement, i.e. opposite to the direction of touchdown, is possible.

Thus, if the sliding part 8 is moved relative to the shaft part 6 against the insertion direction X, there is also a rectified relative movement to the attachment part 22.

A longitudinal section through the shaft part 6, the sliding part 8 and the attachment part 22 in their assembled position (corresponding to the section line XII - XII in FIG. 13) is shown in FIG. 12. It can be seen that the end region of the sliding part 8 lying in the direction of insertion X at the front has a wedge-shaped thickening 30 which rises towards the free end.

In the attachment part 22, which, as shown in FIG. 12, consists of two successive chamber sections 32, 34, which are separated from one another by the intermediate wall 26, the chamber section 34 lying at the front in the insertion direction X is provided with a bottom 36, which is one of the Wedge-shaped thickenings 30 of the sliding part 8 has a corresponding inclination. If the sliding part 8 is now pulled out of the shaft part 6 against the insertion direction X, the wedge-shaped thickening 30 runs against the underside of the inclined bottom 36 of the attachment part 22 and lifts the latter in accordance with the displacement path of the wedge-shaped thickening 30. However, since the attachment part 22 sits together with the shaft part 6 in the metal tube 4, which also positively covers the shaft part 6 on the upper side, this upward movement of the attachment part 22 leads to wedging between the metal tube 4 and the shaft part 6, so that a wedging effect already occurs in this direction (vertically upwards).

FIG. 13 now shows a sectional illustration according to section XIII-XIII in FIG. 12:

13 shows the shape of the sliding part 8 which is used in this embodiment. The sliding part is again provided with a front end portion 12 (that is, projecting beyond the miter surface 2) with a transverse head 13, to which (seen in the insertion direction X) the base body 11 connects, which is attached to the side walls 10 via side projections 24 (in the area of it Thickening 30) to be led. At the front, ie on the opposite side of the sliding part 8, the end section 12 is guided at the point where it passes through the front plate 46 of the shaft part 6.

The base body 11 is provided on its end region facing the miter surface 2 with wedge-shaped projections 40 lying to the side of it, that is to say next to it, with one projection on each of the two sides (arranged symmetrically to one another).

These wedge-shaped shapes 40 run with their outer side 42 facing the side wall 10 against the inner side of the spring arm 15A facing the sliding part 8, which is preferably provided on the inlet side with an inlet slope corresponding to the wedge surface of the associated wedge-shaped projection 40. Instead of an inlet slope, as in FIG. 13, a front rounding at the free end of the expandable spring arm 15A can also be provided, which likewise ensures problem-free, effective engagement between the spring arm 15A and the projection 40.

Seen in the insertion direction X, a recess 16 is again provided in the side walls 10 of the longitudinal groove 7 in front of the expandable spring arms 15A, into which the two wedge-shaped projections 40 project laterally and can remain in the non-spread position of the spring arms 15A.

The spreading out of the spring arms 15A is sufficient to bring about a good wedging of the shaft part 6 in the metal tube 4. If, in addition, the measure of a wedge-shaped run-up of the attachment part 22, which is forced with the same movement, as in the embodiment according to FIGS. 11 to 13, is provided, the shaft part 6 is extraordinarily firmly wedged, which also satisfies high stresses.

11 is a partially sectioned perspective view (approximately corresponding to FIGS. 1 and 6) of a corner connector 5 wedged in the hollow chamber profile 1 according to the embodiments as shown in FIGS. 12 and 13 for the shaft part 6 and sliding part 8 and attachment part 22 are shown, in its wedged position. To better illustrate the same, the metal tube 4 is cut away on the right-hand side of the corner connector 5 in the insertion direction X, so that the spring arm 15A which is spread out there can be seen clearly. It can also be seen that the attachment part 22 is slightly extended upwards (corresponding to the illustration from FIG. 12), as a result of which the desired wedging effect can also be achieved on the upper side.

In the first two embodiments of the corner connector, as shown in FIGS. 1 to 5 and FIGS. 6 to 10, in addition to the lateral expansion of the spring elements 15 and 15A, the relative movement of the sliding part 8 to the shaft part 6 required for this also causes a spreading vertically upwards. For this purpose (not shown in detail in the figures) on the underside of the sliding part 8, seen in the insertion direction X, two protrusions running in the wedge direction are formed, which bear against corresponding slopes 44 on the bottom of the insertion groove 7 and, in cooperation with them, lead to the fact that when the sliding part 8 moves relative to the shaft part 6 against the direction of insertion X, the entire sliding part 8 is also lifted and thus wedging occurs upwards, as is known in principle from EP 1 179 652 A2, whereupon be referred.

In these as well as all other surfaces that cooperate in a wedge shape with these corner connectors, the mutually facing, wedge surfaces that slide against one another can be provided with a suitable corrugation in order to improve a secure wedge fit, so as to ensure better engagement of the wedge surfaces lying against one another and thus a particularly firm fit in the to achieve wedged condition.

The spring elements 15 and 15A, which cause the lateral wedging between the shaft part 6 and the hollow chamber profile 1 (or the metal tube 4 fastened in it) by their expansion, are arranged so that they are as close as possible to the end plate 46 or the inclined surface of the 9th of the shaft part 6 lie so that the spreading effect exerted occurs as close as possible to the inclined surface 9 and the miter surface 2 (in the final assembled state). The additional arrangement of further expansion elements 15 and 15A over the length of the shaft part 6 can of course further increase the wedging effect, as is the case, for. B. is the case in the two first described embodiments.

Claims (11)

Corner connector for connecting two miter-cut hollow chamber profiles (1) of windows, doors or the like, made of weldable plastic, with a shaft part (6) and a sliding part (8), which together form a miter profile (1) from which on miter ( 2) cut side can be pushed in in an insertion direction (X), the shaft part (6) at one end of an inclined surface (9) corresponding to the miter (2) of the hollow chamber profile (1) and lateral flanks (45) to the system Inner surfaces of the hollow chamber profile (1; 4) and in one of the two side flanks connecting the side flanks (45) of the shaft part (6) has a groove (7) running in the insertion direction (X), in which the sliding part (8) sits, which in it, relative to the shaft part (6), can be displaced at least counter to the insertion direction (X) and, on its side facing the inclined surface (9) of the shaft part (6), has an end section (12, 13) for application has its displacement force and a base body (11) adjoining it in the insertion direction (X),
wherein, viewed in the direction of insertion (X), at least on one side of the sliding part (8) or shaft part (6) at least one spreading element (15, 15A) which is laterally expandable transversely to the direction of insertion (X) is formed and is offset laterally to the base body (11) lies and in a movement of the sliding part (8) relative to the shaft part (6) against the insertion direction (X) with a formed on the other of the two shaped element (19; 40) for lateral expansion comes into active engagement. Corner connector for connecting two miter-cut hollow chamber profiles (1) made of weldable plastic for windows, doors or the like with a shaft part (6), a sliding part (8) and an attachment part (22), the sliding part (8) between the shaft part (6) and attachment part (22) and the attachment part (22) is not movable relative to the shaft part (6) in the longitudinal direction of the groove, and wherein the shaft part (6), sliding part (8) and attachment part (22) together in a hollow chamber profile ( 1) can be inserted from its miter (2) side in an insertion direction (X), the shaft part (6) also having at one end a miter (2) of the hollow chamber profile (1) correspondingly inclined inclined surface (4) and Lateral flanks (45) for contacting inner surfaces of the hollow chamber profile (1; 4) and in a side surface of the shaft part (6) connecting its lateral flanks (45) has a groove (17) running in the direction of insertion (X), in which lcher the sliding part (8) sits, which is displaceable in it relative to the shaft part (6) at least against the insertion direction (X) and on its side facing the inclined surface (9) of the shaft part (6) an end section (12, 13) for application a displacement force and a base body (11) adjoining it in the insertion direction (X),
wherein, viewed in the direction of insertion (X), at least on one side of the sliding part (8) or attachment part (22) at least one spreading element (15A) which is laterally expandable transversely to the direction of insertion (X) is formed and is laterally offset next to the base body (11) and when the sliding part (9) moves relative to the shaft part (6) counter to the insertion direction (X) with one of the other two parts formed element (40) for lateral expansion comes into active engagement. Corner connector according to claim 1 or 2, in which an expandable expansion element (15; 15A) is formed symmetrically to the center line of the groove (7) on both sides of the sliding part (8) or of the shaft part (6) or of the attachment part (22) , Corner connector according to Claim 3, in which two laterally expandable expansion elements (15; 15A) are provided symmetrically to one another on each of the two sides of the sliding part (8) or shaft part (6) or attachment part (22). Corner connector according to one of Claims 1 to 4, in which the expansion element (s) (15; 15A) are formed on the sliding body (8), each expansion element (15; 15A) on the shaft part (6) or attachment part (22 ) a shaped element (17, 18; 50) is assigned. Corner connector according to one of claims 1 to 5, in which each expansion element is designed as a spring arm (15) directed against the insertion direction (X), the side of which facing the base body (11) has an inclined surface inclined to the longitudinal direction of the groove (7) Formation of the associated shaped element, the adjacent side wall (10) of the groove (7) in the corresponding area with a recess (16) and the end surface (17; 50) facing the miter surface (9) of the shaft part (6) and delimiting this recess (16) the side wall (10) of the groove (7) is provided with a bevel (18) which essentially corresponds to the inclined surface of the facing spring arm (15). Corner connector according to one of Claims 1 to 4, in which the shaped element (s) (19; 40) is / are attached to the sliding part (8) and each shaped element (19; 40) has a section on the corresponding side wall (10) of the Groove (7) is assigned, which in turn is designed as a laterally expandable wall section (15A) of the shaft part (6). Corner connector according to Claim 7, in which a recess (16) is provided in the side wall (10) of the groove (7) in front of the end face of the expandable wall part and an inclined surface is provided on the side of the end face of the expandable wall section (15A) facing the base body (11) (20) for starting the assigned expansion element (15) on the base body (11). Corner connector according to claim 2 and claim 5, in which each expansion element is designed as a spring arm (15A) directed against the direction of insertion (X), the side of which facing the base body (11) has an inclined surface inclined to the longitudinal direction of the groove (7) and for formation of the associated shaped element (40), the attachment part (22) each protrudes toward the base body (11) substantially above its height, and when it is moved in a direction opposite to the direction of insertion (X) into the gap between the inclined surface and the side surface of the base body (11) facing it ) has an incoming projection which spreads out the spring arm (15A) when it runs in. Corner connector according to Claim 2, in which each shaped element (e) on the sliding part (8) is designed as a projection projecting upwards towards the attachment part and the expansion element (s) on the attachment part (22) is directed against the insertion direction (X). Spring arm (s) is / are provided, each spring arm on its side facing the center of the attachment part (22) having an inclined surface inclined to the longitudinal direction (X) of the groove, and the associated molded part is arranged such that it is displaced when the sliding part ( 8) moves relative to the attachment part (22) against the insertion direction (X) into the gap between the inclined surface and the side surface of the body of the attachment part (22) facing it while spreading the spring arm. Corner connector according to one of claims 1 to 10, in which with increasing displacement of the sliding part (8) relative to the shaft (6) or attachment part (22) through the shaped element, the spreading of the spring element increases.

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