EP2273020B1 - Two-piece air layer anchor - Google Patents

Description

The present invention relates to a two-piece air layer anchor for a two-shell masonry with an inner shell and an outer shell, which are connected by the two-piece air layer anchor.

Air-layer anchor for insertion into the inner shell and the outer shell of a two-shell masonry are for example from the DE 297 18 804 U1 and the DE 102 29 115 A1 known.

The DE 297 18 804 U1 describes an air layer anchor in which a sheet in the region of a central portion and an outer shell portion is bent inwardly at the side edges, while the inner shell portion has the entire width of the sheet metal piece. Punched tabs are bent out of the plane of the sheet to achieve anchoring in the mortar.

The DE 102 29 115 A1 describes an air layer anchor (referred to therein as a "connecting element") which is integrally formed from a piece of flat sheet and whose inner shell portion has at least approximately the same width as the outer shell portion. The air-layer anchor is a piece of sheet folded flat inward in the outer shell portion, bent into a closed cylindrical shape in the middle portion, and partially folded inwardly in the inner shell portion and partially bent inwardly with bulges.

Both known from the prior art air layer anchor are made in one piece or in one piece from a sheet and have a substantially flat inner shell portion for insertion into the inner shell of the masonry and a substantially flat outer shell portion for insertion into the outer shell of the masonry. However, the substantially flat end portions of the air layer anchors ensure sufficient load absorption in one direction only, in particular tension and pressure load absorption. Due to the design known from the prior art, one-piece, made of flat steel air layer anchor can absorb the horizontal forces insufficient. This can adversely affect the necessary non-positive connection between mortar and air layer anchor in the long run.

After pulling up the inner shell and inserting the air layer anchor into the inner shell, when using the air layer anchor known from the prior art, a large part of the air layer anchor from the inner shell, which entails a considerable risk of injury. In order to reduce the risk of injury, the protruding part of the air layer anchor is usually bent upwards or downwards in a vertical direction. Before applying the insulation and inserting the air layer anchor in the outer shell of the air layer anchor must be bent back into its horizontal output arrangement, resulting in a weak point, possible breakage or breaking point at the bending point. The DE 196 47 344 A1 relates to a retaining anchor, which is used in building construction for the connection of an outer shell with an inner shell of a clam shell wall. The retaining anchor is formed in two parts. The connection of the two parts via a loop-shaped connecting part.

The GB 2 268 762 A refers to a two-piece masonry anchor. The inner component of the masonry anchor can be permanently installed and a free end then extends into the cavity between the two-shell masonry. In the inner component, a plurality of holes are arranged in series along the longitudinal axis of the inner component. A corresponding dowel may be inserted into the holes to connect the outer component of the masonry anchor to the inner component.

The AU 626687 B2 relates to a two-piece armature having a first flat part and a second wire-shaped part. The wire-shaped part can be connected to the flat part by inserting it into a cylindrical connecting element arranged on the flat part.

The WO 92/21831 refers to a two-piece masonry anchor with two individual elements, each of which can be introduced into a brick wall. The insertable into the outer shell of the brick wall element is formed as a flat element. It is an object of the present invention to provide a more stable air layer anchor, in which, moreover, the risk of injury given by the air layer anchor when pulling up the outer shell is reduced. In particular, the air layer anchor should also be used in inner shells with a so-called Dünnbettfuge. A masonry with Dünnbettfuge is sometimes referred to as "glued" because the mortar layer between the wall elements is extremely thin, typically from about 1.5 to 2 mm.

This object is solved by the subject matter of the independent claims. Advantageous embodiments will be apparent from the dependent claims.

The inventive two-piece or two-part air layer anchor for a two-shell masonry with an inner shell and an outer shell comprises as first piece or part an inner shell portion for insertion into the inner shell and as a second separate or separable from the first piece or part of an outer shell portion for insertion into the outer shell of the masonry. The inner shell portion and the outer shell portion are made as two separate or separate pieces or parts that can be releasably connected together to form the two-piece air layer anchor.

The inner shell portion is preferably formed as a stamped part, which is for example formed integrally from a piece of flat sheet or flat steel and / or punched. The outer shell portion is formed as a wire part, which may have a circular cross-section, wherein also differently shaped cross-sections, such as elliptical or rectangular cross-sections are conceivable. The diameter of the circular cross section is for example 2 to 6 mm, preferably 4 mm. The preferably round shape the cross section of the outer shell portion allows a load bearing (tensile and compressive load) in all directions and thus also in the horizontal direction.

Preferably, the inner shell portion has a length of 95 mm and the outer shell portion has a length of 125 mm, wherein the total length of the two-piece air layer anchor is achieved in particular by changing the length of the outer shell portion. Preferably, the total length of the air layer anchor is locally adapted to the conditions, such as the distance from the inner shell and outer shell, by changing the length of the outer shell portion. The length of the outer shell section can be varied as desired or, e.g. by selecting an outer shell portion from a plurality of outer shell portions of different lengths, while a fixed or constant length can be used for the inner shell portion.

Furthermore, the inner shell section has an inner shell connecting section and the outer shell section has an outer shell connecting section, via which the inner shell section and the outer shell section are releasably connectable to one another. By the connection of the outer shell portion with the inner shell portion of the two-piece air layer anchor can be formed, the inner shell portion and outer shell portion are separated from each other. In the connected state, the inner shell connecting portion and the outer shell connecting portion may form-fit with each other at least in one direction, and thus connect the inner shell portion and the outer shell portion to the two-piece air layer anchor. Preferably, the inner shell connecting portion is formed at the end of the inner shell portion which is not inserted into the inner shell, and the outer shell connecting portion is formed at the end of the outer shell portion which is not inserted into the outer shell.

The inner shell connection portion may include one or more members for being bonded to or receiving the outer shell connection portion. Thus, the inner shell connecting portion may have a, preferably circular, recess for receiving the outer shell connecting portion. This is particularly advantageous when the outer shell portion is formed as a wire part with a circular cross-section. If the outer shell section and / or the outer shell connection section have a circular cross section, the outer shell connection section can be inserted into the preferably circular recess of the inner shell connection section and hung there, for example, to enter into a connection with the inner shell section. Preferably, the shape and / or the diameter of the recess and the shape and / or the diameter of the, preferably tubular, wire part are matched to one another, so that the outer circumference of the wire part can rest on the inner circumference of the recess. The recess may be a bore or another, in particular circular, cut-out, which may have, for example, an edge hole reinforcement for stabilizing the recess and the inner shell connecting portion.

In addition, the inner shell connecting portion has a guide for guiding and / or stabilizing at least a portion of the outer shell portion, such as the outer shell connecting portion. The guide is preferably formed at the end of the inner shell portion which is not inserted into the inner shell, and is formed by two or more projections or webs which may be integrally formed from the sheet of the inner shell portion and bent up or down perpendicular to the inner shell portion , If the outer shell section is designed, for example, as a wire part with a circular cross section, then the wire part can be guided and received through the guide or between the projections or webs. The at least two perpendicular to the inner shell portion protrusions or webs serve to accommodate and / or stabilize the wire part, but at the same time ensure the desired freedom of movement, for example, to accommodate the Schränkung (opposite movement of masonry shells by thermal influences). The stability of the air layer anchor can also be increased by the nature of the outer shell portion, which is preferably designed as a wire or a shaped as a round body wire part, since the formation of a wire or round body allows at least almost equal load absorption in all directions. The distance between, for example, two webs or projections is preferably matched to the width of the wire part, such as the diameter of the wire part, so that the wire part can be passed through the webs or projections and at least almost rests against the inner sides of the webs or projections.

To connect the outer shell section to the inner shell section, the outer shell connecting section of the outer shell section formed, for example, as a wire part is preferably first guided through the projections matched to the diameter of the wire part (that is, the distance between the projections preferably corresponds at least almost to the diameter of the Wire part or the connecting portion of the wire part, so that the wire part can be guided by the projections) and then received by the preferably circular recess of the inner shell portion connecting portion or hooked into this, to ensure the connection between the outer shell portion and inner shell portion.

The inner shell portion, for example, formed from a piece of flat sheet or flat steel inner portion, preferably along its longitudinal axis a plurality of punched, for example, two, three, four, five, six or more punched on. Preferably, the punched holes are circular in shape and have a diameter of 6 to 10 mm, for example 8 mm. The preferably circular punch-outs can be arranged along the longitudinal axis of the inner shell portion such that the respective centers of the circular punch-outs are located on the longitudinal axis of the preferably flat inner shell portion and the punched-outs are spaced from each other. The Ausstanzungsabschnitt in which the punched on the inner shell portion are arranged, can be used to be inserted into the joint, such as a Dünnbettfuge, the inner shell, said punched by the better anchoring in the mortar of the Dünnbettfuge and thus a better and more stable anchoring of the Inner shell section in the Dünnbettfuge is achieved.

Preferably, the inner shell portion has a width of 14 to 18 mm, in particular 16 mm. If the inner shell section is formed by a flat piece of sheet metal, the thickness of the sheet piece is, for example, 0.3 mm to 0.7 mm, preferably 0.5 mm.

The inner shell portion may also have a counterpressure flap which, for example, may be partially punched out of the inner shell portion formed by a sheet and may be bent up or down perpendicular to the inner shell portion. Preferably, the counterpressure flap in the opposite direction of the guide, as the at least two projections or webs, bent. The counterpressure flap is in particular formed between the inner shell connecting portion and the punched portion and serves to receive the pressure exerted by the outer shell portion connected to the inner shell portion. If the preferably formed as a wire part outer shell portion, for example, in the recess of the inner shell portion mounted so pushes the end of the wire part, especially under load, against the back pressure flap. This occurring due to the preferably circular cross section of the wire part punctual Pressure load can be converted by the flat shape of the counter-pressure plate in a flat compressive load and thus reduce deterioration of the inner shell of the masonry.

The outer shell connecting portion is formed such that it can enter into communication with the inner shell connecting portion, in particular with the guide and the receptacle of the inner shell connecting portion for forming the two-piece air layer anchor. For this purpose, the outer shell connecting portion, which is preferably formed at the end of the outer shell portion which is not inserted into the outer shell, on the shape of the inner shell connecting portion adapted bend, preferably a Z-shaped bend, on. After suspending the outer shell connecting portion in the inner shell connecting portion, the horizontal components of the Z-shaped bend may extend along or parallel to the inner shell portion and the vertical component of the Z-shaped bend may extend perpendicular to the inner shell portion through the recess of the inner shell connecting portion. to ensure a connection between the inner shell and outer shell section.

At its other end to be introduced into the outer shell, the preferably wire-shaped outer shell portion may have a wave-shaped end portion, the waves preferably being in the vertical direction, i.e., in the vertical direction. in the direction of the vertical component of the Z-shaped bend. However, it is also possible to form the waveform into another, such as a horizontal direction. If the wave-shaped end section is inserted into a joint, such as a thick-bed joint, the outer shell, the wave shape ensures a more stable anchoring of the outer shell section in the mortar layer of the thick-bed joint and thus also a more stable anchoring of the air layer anchor in the outer shell.

Ensures the Zweistückigkeit or bipartite of the air layer anchor according to the invention that when pulling up the inner shell of a clam shell masonry only the inner shell portion can be introduced into a joint of the inner shell and thus hardly, but at least significantly less than a one-piece air layer anchor projecting from the inner shell. This leads to a significant reduction in the risk of injury due to protruding parts of the air layer anchor. In addition, the inner shell portion does not have to be bent in order to reduce the risk of injury, so that no additional weak point, possible breakage or predetermined breaking point is generated. This leads to a more stable Cavity wall ties. The same applies in the case of retrofitting the masonry with an insulation and an outer shell. Here, too, the risk of injury without the necessity of bending away of the inner shell portion is reduced in previous pulling up the inner shell.

In addition, due to the two-piece nature of the air layer anchor, the air layer anchor can be adapted more flexibly to the needs. For example, it is conceivable to form the inner shell section for insertion into a thin-bed joint as a flat stamped part and to form the outer shell section for introduction into a thick bed joint as a more stable wire part. In addition, the more stable wire part, in the case of a circular cross-section, can absorb loads in all directions equally well. With a flat sheet-like outer shell section, a load-bearing would only be reliable in one direction, as in the vertical direction, and not in all directions. Especially with only short shell distances between inner shell and outer shell known from the prior art one-piece, flat, formed of sheet metal air layer anchor can not absorb the horizontal forces sufficient and thus loosens in the mortar joint. An example of a wire-shaped outer shell section, however, ensures a load bearing, such as the inclusion of a tensile and / or compressive load, in all directions.

It is also conceivable that a plurality of differently shaped inner shell sections and outer shell sections, for example, a plurality of different flat and wire-shaped inner shell and outer shell sections, is provided, which can be flexibly combined with each other. For example, the outer shell portion may also be made of a flat sheet for introduction into a thin-bed joint, and the inner shell portion may be formed as a wire member having a circular cross-section for insertion into a thick-bed joint. In this case, preferably, the recess and the guide in the outer shell portion and the Z-shaped bend in the inner shell portion would be formed to connect the outer shell portion and the inner shell portion with each other.

Fig. 1

einen zweistückigen Luftschichtanker gemäß einer Ausführungsform der vorliegenden Erfindung in einem zweischaligen Mauerwerk mit einer In- nenschale und einer Außenschale;

Fig. 2a

eine Draufsicht auf den Innenschalenabschnitt des Luftschichtankers aus Fig. 1;

Fig. 2b

einen Schnitt entlang der Längsachse des Innenschalenabschnitts aus Fig. 2a;

Fig. 2c

einen Schnitt quer zur Längsachse des Innenschalenabschnitts aus Fig. 2a; und

Fig. 3

eine Seitenansicht des Außenschalenabschnitts des Luftschichtankers aus Figur 1.

The invention will be described below with reference to a preferred embodiment. Show it:

Fig. 1

a two-piece air layer anchor according to an embodiment of the present invention in a two-shell masonry with an inner shell and an outer shell;

Fig. 2a

a plan view of the inner shell portion of the air layer anchor Fig. 1 ;

Fig. 2b

a section along the longitudinal axis of the inner shell portion Fig. 2a ;

Fig. 2c

a section transverse to the longitudinal axis of the inner shell portion Fig. 2a ; and

Fig. 3

a side view of the outer shell portion of the air layer anchor FIG. 1 ,

FIG. 1 shows a two-piece air layer anchor 1 inserted into a clam shell masonry with an inner shell 100 and an outer shell 200 according to an embodiment of the present invention. As in Fig. 1 can be seen, an inserted into the inner shell 100 of the masonry inner shell portion 10 of the air layer anchor 1 as at least partially flat sheet metal part is formed, which is inserted into a Dünnbettfuge 110 of the inner shell 100. An inserted into the outer shell 200 of the masonry outer shell portion 20 of the air layer anchor 1 is formed as a wire member having a circular cross-section which is inserted on one end side in a thick bed joint 210 of the outer shell 200 and is connected on its other end side with the formed of a sheet metal part inner shell portion 10 , On the formed as a wire part outer shell portion 20, an insulating plate 300 is applied, which rests against the inner shell 100 of the masonry. The in FIG. 1 shown two-piece air-layer anchor 1 connects the inner shell 100 of a masonry on the insulation board 300 and an air gap or an air layer 400 with the outer shell 200 of the masonry.

In addition, a clamping disk 23 and a drip disk 24 are arranged on the outer shell section 20 formed as a wire part. Via the drip disk 24, condensation water formed in the air layer 400 can drip off, so that an influence on the insulation board 300 by condensed water is reduced. About the clamping plate 23, the insulation board 300 is clamped or pressed against the inner shell 100 in order to achieve better insulation.

As in FIG. 1 can be seen, the at least partially formed flat sheet metal part is inserted into a thin-bed joint 110 of the inner shell 100 and is the wire part in a thick-bed joint 210 of the outer shell 200 is inserted. Due to the shape and thickness of the wire part, a higher and more uniform load bearing is achieved than with a sheet metal part.

Via an inner shell connecting portion 11 arranged on the inner shell portion 10 and an outer shell connecting portion 21 arranged on the outer shell portion 20, the inner shell portion 10 and the outer shell portion 20 are detachably connected to the two-piece air layer anchor 1. The individual elements of the inner shell portion 10, the inner shell connecting portion 11, the outer shell portion 20 and the outer shell portion connecting portion 21 will be described with reference to FIGS FIGS. 2a, 2b, 2c and 3 be described in more detail.

In the FIGS. 2a to 2c is formed as a sheet metal part inner shell portion 10 of in FIG. 1 shown two-piece air layer anchor 1 individually, shown as a separate piece. The inner shell section 10 has, in its inner shell section connecting section 11 as connecting elements, two upwardly bent projections 11a having a length of 6.5 mm serving as a guide of the outer shell section 20 and a bore 11b having a diameter of 4.2 mm provided with an edge hole reinforcement on. Like from the FIGS. 2b and 2c can be seen, the length of the sheet metal part 95 mm and the width of the sheet metal part 16 mm.

As in FIG. 2a are shown, along the longitudinal axis of the sheet metal part circular punched holes 13 are formed with a diameter of 8 mm. The portion of the sheet metal part having the circular cutouts 13 is as shown FIG. 1 seen flat and serves to be inserted into the Dünnbettfuge 110 of the inner shell 100 for anchoring the sheet metal part with the inner shell 100. About the circular punch-outs 13 ensures that the mortar connects above and below the sheet metal part through the sheet metal part together, which ensures a more stable and firmer anchoring of the sheet metal part in the inner shell 100.

Between the punched portions 13 having portion of the inner shell portion 10 and the inner shell-connecting portion 11, adjacent to the bore 11b, a perpendicular to the sheet metal part counter-pressure plate 12 formed by the fact that the gate-shaped periphery of the counter-pressure plate 12 punched out of the sheet metal part and bent down is. How out FIG. 2b can be seen, the projections 11a and the back pressure plate 12 parallel to each other, vertical to the inner shell portion 10, but bent in different directions.

The counter pressure flap 12 is punched out of the sheet metal part, bent downwards perpendicular to the sheet metal part and has a length of 10.3 mm. As in FIG. 1 can be seen, the counter-pressure plate 12 serves to absorb the pressure exerted by the wire portion point pressure to deliver as a surface pressure on the inner shell 100 and thus to reduce deterioration of the inner shell 100 of the masonry by punctual load. As in FIG. 1 to recognize only the inner shell connecting portion 11 and the back pressure plate 12 from the inner shell 100 before, while the remaining part of the inner shell portion 10 is located in the Dünnbettfuge 110 of the inner shell 100.

The bent up at the end of the sheet metal part perpendicular to the sheet metal part two projections 11a have a length of 6.5 mm. As in Figure 2c to see, the distance between the two protrusions 11a is 4.2 mm, so that the wire part after FIG. 3 has a diameter of 4 mm, can be passed through the projections 11 a and can be absorbed and stabilized by these. For complete connection of the wire part with the sheet metal part, the wire part is guided through the formed in the sheet metal part, for example by punching bore 11b, which has a, also to the diameter of the wire part of 4 mm tuned diameter of 4.2 mm, and so in the Sheet metal part hung or anchored.

FIG. 3 shows the formed as a sheet metal part outer shell portion 20 of the air layer anchor 1 FIG. 1 as a separate piece. How out FIG. 3 to recognize the diameter of the circular cross-section of the wire part 4 mm and the total length of the wire part 125 mm. A wavy, between 48 and 52 mm long section 22 is formed at a first end of the wire part, which, as shown Fig. 1 can be seen, in the thick bed joint 210 of the outer shell 200 is inserted. By the waveform, a firmer and more stable anchoring of the wire part in the thick-bed joint 210 is achieved. The second end of the outer shell portion 20 has along a portion of 10 mm along the longitudinal axis of the wire part, a bent portion 21 as a connecting portion which assumes 12 mm perpendicular to the longitudinal axis of the wire portion. The bent portion 21 is bent in the shape of the letter "Z" and, due to its shape and dimensions, can be guided by the projections 11a of the sheet metal part and the bore 11b of the sheet metal part and connected to the sheet metal part by hanging. Through the connection of the wire part with the sheet metal part over the Z-shaped section 21, the two webs 11a and the bore 11b, a stable, detachable connection and thus a stable two-piece air layer anchor is provided.

Claims (9)

1. A two-piece cavity wall tie (1) for a cavity wall, comprising an inner shell (100) and an outer shell (200), wherein the cavity wall tie (1) comprises as a first component an inner shell portion (10) for insertion in the inner shell (100) and as a second, separate component an outer shell portion (20) for insertion in the outer shell (200), said inner shell portion (10) and said outer shell portion (20) being adapted to be connected to one another via an inner shell connecting section (11) formed on the inner shell portion (10) and an outer shell connecting section (21) formed on the outer shell portion (20), wherein the inner shell connecting section (11) is provided with at least two flanges or projections extending at right angles to the inner shell portion (10) and used as a guide means (11a) for guiding the outer shell portion (20), characterized in that the outer shell portion (20) is configured as a wire element, in particular a wire element having a circular cross-section with a diameter of 2 to 6 mm, preferably 4 mm.
2. A two-piece cavity wall tie (1) according to the preceding claim, wherein the inner shell portion (10) is configured as a, preferably flat, blanked part.
3. A two-piece cavity wall tie (1) according to one of the preceding claims, wherein the inner shell connecting section (11) is provided with a, preferably circular, opening (11b) for receiving therein the outer shell connecting section (21).
4. A two-piece cavity wall tie (1) according to the preceding claim, wherein the edge of the opening (11b) is reinforced.
5. A two-piece cavity wall tie (1) according to one of the preceding claims, wherein the inner shell portion (10) includes a punched-out portion for insertion in the inner shell (100), in which punched-out openings (13), in particular circular punched-out openings having a diameter of from 6 to 10 mm, preferably 8 mm, are formed along the longitudinal axis of the inner shell portion (10).
6. A two-piece cavity wall tie (1) according to one of the preceding claims, wherein the inner shell portion (10) has a width of from 14 to 18 mm, in particular 16 mm.
7. A two-piece cavity wall tie (1) according to one of the preceding claims, wherein the inner shell portion (10) is provided with a counterpressure lug (12) between the inner shell connecting section (11) and the punched-out portion (13).
8. A two-piece cavity wall tie (1) according to one of the preceding claims, wherein the outer shell connecting section (21) includes a bend, in particular a Z-shaped bend, for connection with the inner shell portion (10).
9. A two-piece cavity wall tie (1) according to one of the preceding claims, wherein the outer shell portion (20) includes an undulated end section (22) for insertion in the outer shell (200).

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