DE29718804U1 - Air layer anchor - Google Patents

Description

BEVER Society for
Fasteners-Connectors
mbH
1G-78 956
22 October 1997

Air layer anchor

The invention relates to an air layer anchor for double-shell masonry consisting of an inner shell, air layer and outer shell with an elongated central section for bridging the air layer, a flat first end section for bricking into the inner shell and a flat second end section for bricking into the outer shell.

Such an air layer anchor is known, for example, from DE-3 7 17 563 C2 (referred to there as a "hollow wall anchor"). There, the end section of the air layer anchor that is embedded in the outer shell (referred to there as the "outer hollow wall panel") is flattened and grooves running transversely are made on the top and bottom of the flattened end section. Mortar penetrates into the grooves so that the anchor is anchored in the outer shell.

The state of the art also includes wire anchors for anchoring double-leaf masonry in such a way that one angled end of the wire anchor is embedded in the masonry of the inner shell and another angled end of the anchor is embedded in the mortar of the outer shell.

The length and diameter of the anchors depend on the shell spacing and the building height and are specified in DIN-1053. Such wire anchors are not suitable for use in so-called lightweight mortar (LM 21).

The invention is based on the task of designing an air layer anchor of the type mentioned at the beginning in such a way that it can be used as versatilely as possible with the lowest possible manufacturing effort in terms of material, tools and energy. In particular, the air layer anchor should also be usable for outer shells that are made with so-called thin-bed mortar. Masonry with thin-bed mortar is sometimes also referred to as "glued" because the mortar layer between the masonry elements is extremely thin; mortar thicknesses of around 1.5 to 2 mm are typical.

For this purpose, the invention provides that the flat end section of the air layer anchor, which is to be embedded in the outer shell, has recesses on both of its side edges to accommodate mortar. In this way, the air layer anchor can be kept extremely flat and yet be embedded in a stable manner, i.e. with high tensile and compressive strength.

Preferably, the air layer anchor is formed entirely from a single piece of flat steel.

It is also preferred that the piece of flat steel is bent round in the middle section and folded flat in the second end section intended for the outer shell. According to a particularly preferred embodiment, the lateral edges of the end section to be inserted into the outer shell are folding lines.

The recesses can be semicircular, for example. The recesses on both edges can also be offset from one another, i.e. the recesses on both edges of the end section are "spaced" from one another.

A further preferred embodiment of the air layer anchor provides that tabs are punched and bent in the first flat end section.

The air layer anchor made of flat steel according to the invention meets all requirements of DIN 1053 and is suitable for all mortar groups.

It can therefore be described as a universally applicable air layer anchor.

An embodiment of the invention is explained in more detail below with reference to the drawing. It shows:

Fig. 1 schematically shows an air layer anchor;

Fig. 2 a section through a part of the air layer anchor according to Fig. 1 along the line A-B

Fig. 3 is a section through the air layer anchor according to Fig. 1 along the line C-D;

Fig. 4 a section through the air layer anchor according to Fig. 1 along the line E-F and

Fig. 5 shows schematically the use of the air layer anchor in a double-leaf masonry.

Fig. 1 shows an air layer anchor on a scale of approximately 1:1. The air layer anchor has a total length of approximately 30 cm, although other lengths are possible depending on the shell spacing.

The air layer anchor has an elongated central section 10, a first flat end section 12 and a second flat end section 14.

Fig. 5 shows a schematic representation of a double-shell masonry with an outer shell V, air layer L and inner shell H. Fig. 5 also shows a schematic representation of an air layer anchor (on a much smaller scale than Fig. 1), with the first end section 12 being embedded in the inner shell H, the middle section 10 bridging the air layer L and the second end section 14 being embedded in the outer shell V. Fig. 5 also shows a schematic representation of the elements of the masonry and the mortar joints.

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The air layer anchor is made entirely from a single piece of flat steel. In the example shown, the flat steel has a thickness of 0.5 to 0.6 mm. This is also the thickness of the flat steel in the area of the first flat end section 12.

As Fig. 3 shows, the flat steel 16 is bent into a circle in the area of the middle section 10 and the edges of the flat steel meet at point 18. In the area 22 of the middle section 10, the flat steel expands to its full width of 13 mm.

The second end section 14 of the air layer anchor is folded. Fig. 4 shows a section along the line E-F of Fig. 1. Recesses 20 are punched out on the side edges 30 of the end section 14. According to Fig. 5, the second end section 14 of the air layer anchor is embedded in thin-bed mortar of an outer shell V. The mortar thickness is approximately 1.5 to 2 mm. Accordingly, the thickness S of the folded end section 14 of the air layer anchor is less than the mortar thickness; in the exemplary embodiment, the thickness S is approximately 1.2 mm. The length of the end section 50 is 45 to 60 mm, in the preferred exemplary embodiment approximately 50 mm. The recesses 20 are preferably semicircular with a diameter of approximately 4 mm.

As can be seen from Fig. 1 and Fig. 4, the two side edges 30 of the second end section 14 are fold lines, i.e. the flat steel is bent along its side edges 30 and flattened to the already specified thickness S of approximately 1.2 mm. At the point 18, the edges of the flat steel meet. At this point 18 (see Fig. 1 and Fig. 4), the second end section 14 has a groove-shaped recess in the longitudinal direction of the anchor (see Fig. 4).

The first end section 12 of the air layer anchor is shown schematically in Fig. 2 in section along the line AB of Fig. 1. The thickness S ₁ of the air layer anchor in the end section 12 is approximately 0.5 to 0.6 mm in the embodiment shown. In the end section 12, tabs 24 are punched out and bent up, as can be seen from

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1 and 2. The acute-angled tabs 24 anchor the air layer anchor in the mortar. The width Br of section 12 is only 13 mm, which represents a considerable saving in material compared to the state of the art. In addition to the width Br of 13 mm of the embodiment shown, widths in the range of 12 to 16 mm are also possible.

Directly adjacent to the area 22 in which the rounded flat steel expands from the middle section 10 into the flat end section 12, two recesses 26 are formed on the side edges of the end section 12, for example by punching.

A support 28 pressed into the flat steel (see Fig. 1 and 2) stabilizes the air layer anchor in the critical transition area 22, in particular with regard to its buckling strength.

The air layer anchor shown saves you having to bend down. It can be used both with a "glued" inner shell (e.g. thin-bed mortar) and with an outer shell with normal mortar and also with a "glued" inner shell H and "glued" outer shell V. It is suitable for all mortar groups.

Claims (7)

BEVER Gesellschaft für Befestigungsteile-Verbindungselemente mbH 1G-78 956 ' 22 October 1997 Protection claims 1. Air layer anchor for double-shell masonry consisting of an inner shell, air layer and outer shell with an elongated central section (10) for bridging the air layer, a flat first end section (12) for bricking into the inner shell and a flat second end section (14) for bricking into the outer shell, characterized in that the second flat end section (14) has recesses (20) on its two lateral edges (30) for receiving mortar. 2. Air layer anchor according to claim 1, characterized in that it is formed entirely from a single piece of flat steel. 3. Air layer anchor according to claim 2, characterized in that the piece of flat steel is bent round in the middle section (10) and folded flat in the second end section (14). 4. Air layer anchor according to claim 3, characterized in that the lateral edges (30) of the second end section (14) are fold lines. 5. Air layer anchor according to one of the preceding claims, characterized in that the recesses (20) are semicircular. 6. Air layer anchor according to one of the preceding claims, characterized in that the recesses (20) on both edges (30) of the second end section (14) are offset from one another. 7. Air layer anchor according to one of the preceding claims, characterized in that tabs (24) are punched and bent in the first flat end section (12).