EP0393210A1 - Adjustable dowel anchor for the concealed installation of facade elements - Google Patents

Abstract

An adjustable dowel anchor for the concealed installation of facade elements, comprising a bracket and an adjusting part intended for receiving a carrying pin, is developed. In order that the dowel anchor can be adjusted even with suspended facade elements and is suitable even for heavier facade panels, the bracket 1 is formed from two substantially parallel, approximately L-shaped pieces in such a way that, in the upper end, an opening 3 for a carrying dowel 4 is provided and, in the lower end, a receptacle 5, open towards the front, for the adjusting part 2 exists, and the adjusting part 2 is, in the region of the bracket 1, an upended flat steel bar. According to a further proposal, elongated holes 9 and bolts, screws 10, 11 or the like cooperating therewith are provided on the adjusting part 2 and the bracket 1 at a distance from one another. Particularly reliable, to some extent also automatic, locking can be obtained by means of ratcheting, toothing 12 or the like, an adjusting screw 15, further elongated holes 19 in conjunction with a screw bolt 20 or the like, and also an adjusting plate 21 with an elongated hole 19. <IMAGE>

Description

Technical field

The invention relates to an adjustable anchor anchor for concealed attachment of facade elements, consisting of a bracket which can be attached to a wall surface by means of a support anchor and, if necessary, is height-adjustable by means of a wedge which can be driven in between the bracket and the support anchor, and an adjustment part which is intended to accommodate a support mandrel, which can be moved relative to the console in the direction of the wall surface or away from it and can be locked in several positions.

State of the art

In known dowel anchors of this type, the adjustment part is formed by a threaded rod. This is flattened in the shape of a tongue at the front end and provided with a carrying mandrel. It is perceived as a disadvantage in this embodiment that an adjustment is not possible with a suspended facade element, rather this must be removed beforehand. Only then can a more precise adjustment be attempted again. Of course, this is cumbersome and time-consuming.

Another disadvantage is as follows. The strength of the threaded rod depends on the load. The more the threaded rod has to be selected, the greater the required deformation (flattening) in the area of the tongue so that it still fits into a normal joint (usually 5 - 10 mm wide). However, there is a risk of cracking, which is why there are limits to deformation and load capacity (currently around 1400 Newtons). In the case of narrow joints, it may also be necessary to incorporate so-called anchor pockets from the back, which means additional effort.

Presentation of the invention

This is where the invention begins. It is based on the task of developing a dowel anchor of the type mentioned in such a way that it can also be adjusted with a suspended facade element. In addition, the new anchor anchor to be proposed should also be suitable for heavier facade panels or elements.

This object is achieved according to the invention in that the bracket is formed from two substantially parallel, approximately L-shaped pieces in such a way that there is a passage for a carrying dowel at the upper end and a receptacle open to the front for the adjustment part is provided at the lower end. and that the adjustment part in the area of the console is an upright flat iron.

As can be seen, the console has a special structure, which brings high stability and multifunctionality. "L-shaped" here means any shape which has a certain height for fastening and a certain projection for variable wall spacing. The upper end, which is usually somewhat extended, facilitates secure attachment and the lower end enables problem-free interaction with the adjustment part of a new shape. The latter can also be designed for considerable loads with a constant narrow width. The height required for this is unproblematic and does not appear disruptive. If necessary (namely for horizontal joints), the front end can also be rotated (by 90 °) without any loss. In any case, the distance from the wall can also be changed even when the facade elements are hung in, since the bracket and adjustment part are only designed for torsion-free, straight-line movement towards or away from the wall surface.

For guidance and limitation of movement, elongated holes and bolts, screws or the like interacting therewith are advantageously provided on the one hand on the adjusting part and on the other hand on the console. At least one screw allows the adjustment part to be locked in relation to the console and thus to maintain a certain distance from the wall.

In order to withstand even high wind forces such as can occasionally occur, the adjustment part and the console on the one hand are expediently provided with a raster, teeth or the like on at least one contact side, or are otherwise prepared for mutual engagement. As can be seen, a certain positive locking should take place, which allows higher compressive and tensile forces (than by friction alone) to be transmitted from the facade element to the console or wall surface without changing the position.

For stepless adjustment and simultaneous locking, according to another proposal, an adjusting screw extending in the direction of adjustment is provided, which on the one hand engages in a threaded bore on the adjusting part and on the other hand is held in a stationary but rotatable manner on the console and can be locked there if necessary by means of a lock nut. Advantageously, the bolts of the Adjustment part and the console the points of attack and stops for the adjustment screw.

A stepless adjustment and automatic locking serves a further embodiment with the special feature that further elongated holes are provided transversely to the adjustment direction in the adjustment part and console, which run in such a way that they partially intersect at different heights when the adjustment part moves and there is a free one Form passage, and that a screw bolt or the like is passed through the passage.

The further elongated holes expediently run at an acute angle to one another. If one grips the screw bolt and pulls it upwards or pushes it down, the adjustment part moves and the wall distance of a facade element connected to it changes. In contrast, tensile or compressive forces acting on the facade element do not result in a change in position, rather the screw bolt wedges in the elongated holes and thus an automatic locking. After adjustment, the screw bolt can also be tightened in order to rule out any unintentional influence during further assembly.

Comparable effect shows a slightly different embodiment, with the special feature that between stiffener and bracket is provided between two abutments of the bracket up and down movable adjustment plate with a transverse to the adjustment slot, which cuts the slots of the console and just like the latter the bolt of the adjustment part.

The adjusting plate can consist of a relatively thin sheet, since it is clamped well on all sides in the area of the force and is prevented from inadmissible deformation. The elongated hole of the adjustment plate expediently cuts the elongated holes of the base at an obtuse angle.

The abutments are advantageously formed by a pressure plate, more precisely a pressure distribution plate, on the back of the console and a screw passing through the console at a distance from it. The pressure plate can also significantly improve the cohesion of the console, namely the two L-shaped pieces, and also compensate for the additional material thickness when using a wedge on the back of the console. If the bolt of the adjustment part acts on the adjustment plate, it is supported either against the pressure plate or the screw. The screw fulfills the further function of additionally securing a once selected setting, i.e. against unintentional actuation of the adjustment plate. In addition, the screw can very effectively prevent the front free ends of the console from spreading. For locking purposes only, a bolt instead of a screw would be sufficient.

Brief description of the drawing

• Fig. 1 einen Dübelanker mit einer Verzahnung zwischen Verstellteil und Konsole in Seitenansicht,
• Fig. 2 einen anderen Dübelanker mit einer Verstellschraube in Seitenansicht,
• Fig. 3 einen Dübelanker mit einem Schraubbolzen, welcher in weiteren Langlöchern in Verstellteil und Konsole geführt ist, in Seitenansicht,
• Fig. 4 die Konsole von Fig. 3 in Seitenansicht,
• Fig. 5 das Verstellteil von Fig. 3 in Unteransicht,
• Fig. 6 den Gegenstand von Fig. 5 in Seitenansicht,
• Fig. 7 einen Dübelanker mit einer Verstellplatte in Seitenansicht,
• Fig. 8 den Gegenstand von Fig. 7 in Vorderansicht,
• Fig. 9 die Konsole von Fig. 7 und 8 in Seitenansicht,
• Fig. 10 das Verstellteil von Fig. 7 und 8 in Unteransicht,
• Fig. 11 den Gegenstand von Fig. 10 in Seitenansicht,
• Fig. 12 die Verstellplatte von Fig. 7 und 8 in Seitenansicht,
• Fig. 13 einen Dübelanker analog der Fig. 7, jedoch mit einem Verstellteil für horizontale Fugen,
• Fig. 14 den Gegenstand von Fig. 13 in Vorderansicht,
• Fig. 15 das Verstellteil von Fig. 13 und 14 in Unteransicht und
• Fig. 16 den Gegenstand von Fig. 15 in Seitenansicht.

Further details and advantages are described below with reference to the drawing for various exemplary embodiments. In it show:

• 1 is a side view of a dowel anchor with a toothing between the adjustment part and the console,
• 2 is another side anchor with an adjusting screw in side view,
• 3 is a side view of a dowel anchor with a screw bolt, which is guided in further elongated holes in the adjustment part and console,
• 4 shows the console of FIG. 3 in side view,
• 5 shows the adjustment part of FIG. 3 in a bottom view,
• 6 shows the object of FIG. 5 in side view,
• 7 is a side view of a dowel anchor with an adjustment plate,
• 8 shows the object of FIG. 7 in front view,
• 9 is a side view of the console of FIGS. 7 and 8,
• 10 the adjustment part of FIGS. 7 and 8 in a bottom view,
• 11 shows the object of FIG. 10 in side view,
• 12 the adjustment plate of FIGS. 7 and 8 in side view,
• 13 shows a dowel anchor analogous to FIG. 7, but with an adjustment part for horizontal joints,
• 14 the object of FIG. 13 in front view,
• Fig. 15, the adjustment part of Figs. 13 and 14 in bottom view and
• Fig. 16 shows the object of Fig. 15 in side view.

1, a dowel anchor according to the invention consists of an L-shaped bracket 1 and an adjustment part 2 in the form of an upright flat iron. The console 1 is composed of two L-shaped pieces which run essentially parallel to one another and at the upper end a passage 3 for a carrying plug 4 (see FIG. 7) and at the lower end a receptacle 5 open to the front for the adjustment part 2 form. At the upper end of the console 1 or the passage 3, a recess 6 is made in the wall, into which a wedge 7 is bent NEN upper edge (see. Fig. 2 ff.) Can engage. At the bottom, the console 1 ends on the wall side with a pressure plate 8, which has several functions. Thus, the console 1 can be reinforced, the material thickness of the wedge 7 can be compensated, and the pressure generated can be better distributed over the wall surface. Otherwise, the pressure plate 8 can limit the freedom of movement of the adjustment part 2 and in particular other parts interacting therewith (cf. further exemplary embodiments).

To guide the adjusting part 2 in the console 1, an elongated hole 9 in the adjusting part 2 and two further congruent elongated holes 9 in the two L = shaped pieces of the console 1 are initially provided here. In the area of the last-mentioned elongated holes 9, a bolt 10 is attached to the adjustment part 2, in the area of the first-mentioned elongated hole 9 a screw 11 which extends across the bracket 1 and is secured there by means of a nut. Elongated holes 9, bolt 10 and screw 11 lie on a line and, in addition to good guidance, also ensure a limitation of the movement, including captive cohesion of adjustment part 2 and console 1.

As a special feature, the adjustment part 2 and the console 1 also have a toothing 12 on their contact side, which extends here transversely to the direction of adjustment indicated by the double arrow 13 and allows mutual (positive) engagement as soon as the screw 11 has been tightened after adjustment of the adjustment part 2 becomes. A very effective locking can thus be achieved. The adjustment itself can be carried out if a facade element (not shown here in more detail) is already suspended in a carrying mandrel 14 at the tip (tongue) of the adjustment part 2. The adjustment part 2 with its slim and space-saving shape shown in connection with the described console 1 is also able to carry facade elements of considerable weight.

2, the adjustment part 2 can also be moved by means of an adjustment screw 15. This extends in the direction of adjustment, corresponding to the double arrow 13. It engages on the one hand in a threaded bore 16 on the bolt 10 of the adjusting part 2 and on the other hand is rotatably held on a further bolt 10 of the bracket 1 in a transverse bore 17. The adjusting screw 15 is also used for locking, it can still be locked against unintentional actuation by means of a lock nut 19.

As can be seen from FIGS. 3 to 6, a stepless adjustment possibility for the adjustment part 2 also results from the arrangement of further elongated holes 19 in the console 1 and adjustment part 2 in connection with a screw bolt 20. The elongated holes 19 run at an acute angle to one another and overall transversely to the adjustment direction of the adjustment part 2. They intersect at different heights partly depending on the movement of the adjustment part 2. In the cutting area, the elongated holes 19 form a free passage for the screw bolt 20. If tensile or compressive forces occur (wind suction or pressure) in the direction of the double arrow 13, wedging occurs with the screw bolt 20 and thus an automatic locking. The fact that the screw bolt 20 can also be tightened means an additional safety measure, which also excludes inadvertent actuation of the screw bolt 20 during assembly.

7 to 12 illustrate a further embodiment, namely with an adjustment plate 21, which is comparable in meaning to the aforementioned embodiment, namely with regard to a stepless movement of the adjustment part 2 and an automatic locking of the same. The adjustment plate 21 is provided with an elongated hole 19 transversely to the adjustment direction of the adjustment part 2, the elongated hole 19 as well as the elongated holes 9 of the bracket 1 receiving the bolt 10 of the adjustment part 2. For the stepless movement of the adjustment part 2, the adjustment plate only needs to be moved in the direction of the double arrow 22. The pressure plate 9 and the screw 11 act as an abutment. Of course, the adjustment can be done with the facade element suspended. As soon as forces occurred in the direction of the double arrow 13, the bolt 10 acts on the adjusting plate 21 and supports the latter either against the pressure plate 8 (= pressure) or the screw 11 (= train). As previously explained, additional securing can be achieved by tightening the screw 11.

The dowel anchor according to the invention and in particular the exemplary embodiments shown can be used both for vertical and horizontal joints. For this purpose, only the tip (tongue) of the adjustment part 2 needs to be turned into a horizontal position, while the adjustment part 2 remains upright in the area of the console 1. With the twisting of the tip, a change in direction of the carrying mandrel 14 is connected, which then runs vertically. Further changes are not necessary, as can be seen from a comparison of the further exemplary embodiment according to FIGS. 13 to 16 in comparison with the exemplary embodiment according to FIGS. 7 to 12.

Claims (10)

1. Adjustable dowel anchor for a concealed one Attachment of facade elements, consisting of a bracket, which can be attached to a wall surface using a support dowel and, if necessary, height-adjustable by means of a wedge that can be driven in between the bracket and the support dowel, and an adjustment part intended to accommodate a support mandrel, which is opposite the console in the direction of the wall surface or . Movable away from it and lockable in several positions, characterized in that the bracket (1) is formed from two substantially parallel, approximately L-shaped pieces such that a passage (3) for a carrying dowel (4 ) is given and at the lower end there is a receptacle (5) for the adjustment part (2) which is open towards the front, and that the adjustment part (2) is an upright flat iron in the area of the console (1). 2. Dowel anchor according to claim 1, characterized in that on the one hand on the adjusting part (2) and on the other hand on the bracket (1) at a distance from each other elongated holes (9) and cooperating bolts, screws (10, 11) or the like are provided . 3. Dowel anchor according to claim 1 or 2, characterized in that on the one hand the adjusting part (2) and on the other hand the bracket (1) on at least one contact side with a raster, teeth (12) or the like. Or in any other way for one mutual intervention are prepared. 4. Dowel anchor according to claim 1 or 2, characterized in that an adjusting screw extending in the direction of adjustment (15) is provided, which on the one hand engages in a threaded bore (16) on the adjusting part (2) and on the other hand stationary, but rotatable, on the console ( 1) is held and, if necessary, lockable there by means of a lock nut (18). 5. Dowel anchor according to claim 4, characterized in that the bolts (10) of the adjustment part (2) and the bracket (1) form the engagement and stopping points for the adjustment screw (15). 6. Dowel anchor according to claim 1 or 2, characterized in that in the adjustment part (2) and bracket (1) further elongated holes (19) are provided transversely to the direction of adjustment, which extend to each other such that they move during the movement of the adjustment part (2) Partially cut at different heights and form a free passage there, and that a screw bolt (20) or the like is guided through the passage. 7. Dowel anchor according to claim 1 or 2, characterized in that between the adjusting part (2) and bracket (1) between two abutments of the bracket (1) up and down movable adjusting plate (21) with a transverse to the direction of elongated hole (19) It is provided which cuts the elongated holes (9) of the bracket (1) and, like the latter, receives the bolt (10) of the adjustment part (2). 8. Dowel anchor according to claim 7, characterized in that the abutments of a pressure plate (8) on the back of the bracket (11) and a through the bracket (1) continuous screw (11) are formed at a distance from it. Reference symbol list 1 console 2 adjustment part 3 passage 4 carrying dowels 5 recording 6 recess 7 wedge 8 pressure plate 9 slot 10 bolts 11 screw 12 teeth .13 Double arrow 14 carrying mandrel 15 adjusting screw 16 threaded hole 17 cross hole 18 lock nut 19 slot 20 bolts 21 adjustment plate 22 double arrow

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