DE9301098U1 - Screw dowels for fastening the Eternit shingles to full thermal insulation facades - Google Patents

Description

Screw dowels for fastening the Eternit shingles on fully thermally insulated facades

The invention relates to a (special dowel) screw dowel for fastening Eternit shingles as facade cladding on fully heat-insulated rigid foam panels (Styrofoam)^ of the type specified in the preamble of patent claim 1.

It is known that there are many types of plastic or metal dowels on the market for all possible fastening variants and special constructions, and all of them fulfil their special task and application.

It is not known whether there are screw anchors that can be used without any additional mounting structures, without being anchored in the masonry, for facade cladding made of Eternit shingles or similar, in particular their attachment directly to full thermal insulation made of rigid foam boards, Styrofoam or similar.

The invention is based on the task of quickly and safely, and without further auxiliary measures, in particular in the case of facade substrates made of ventilated full thermal insulation of ten centimeters thick with air gaps of five centimeters wide made of rigid foam panels (Styrofoam), also a facade cladding made of Eternit shingles or similar, in a storm-proof and permanent manner without lath scaffolding.

In a screw anchor for fastening the Eternit shingles to full thermal insulation panels, of the type specified in the preamble of patent claim 1, this object is achieved according to the invention by the

Part of claim 1 specified features.

The essence of the invention is a spiral-shaped two-and-a-half-turn external thread with a saw-shaped thread comb, which can be screwed into the hard foam board when rotated and forms a firm connection, as is known with normal screws. The essence of the invention is a head plate with a large surface area that has two opposite holes to accommodate a tool for screwing in, with a third hole with the same core distance accommodating a nail pin so that the dowel cannot come loose on its own. The dowel core hole also serves as the fastening pin for the Eternit shingles. The essence of the invention is the slim, tapered, knife-like thread construction that can be screwed in self-tapping when turned without tearing the fastening material (styrofoam). The particular advantage is a quick, easy, safe way of fastening the Eternit shingles to styrofoam, which was previously impossible or very difficult to do. All the complex rail and batten fastenings directly to the external masonry with very long screws are no longer necessary, and they were not safer or risk-free either, but very complex and time-consuming.

The invention is explained in more detail below with reference to the drawing, for example:
this shows in

Figure 1 is a cross-section of a screw anchor in the assembled state with nail protection against self-loosening and fastening pin in the anchor core in the finished state, according to the invention;

-A-

Figure 2 shows the bottom view of a screw anchor with arranged incision area and saw-like thread comb, according to the invention.

Figure 3 shows a side view of a screw anchor in a finished state according to the invention

Figure A shows a top view of the head plate of the screw anchor, with the two horizontal holes holding the assembly key and the core hole holding the fastening pin of the Eternit shingles or similar, while the upper hole holds the safety device against self-loosening.

In the embodiment shown in Figure 1, it should be clear how the seat of the screw dowel profile in the screwed-in or mounted state in a 10 cm thick polystyrene plate can be achieved without tearing the material, whereby the surrounding soft polystyrene material of the insulation plate 13 can be solidified considerably for higher demands by injection 12 (liquid plastic).

Fig. 2 shows the spiral threaded attachment 2, which runs to the end of the dowel in the conical part 11 with a cut, the cutting edges of which have a saw-like thread crest A. A continuous core hole 6, adapted to the fastening pins 7, can also be used for an injection 12. (thin adhesive mortar or liquid plastic). Two opposite holes Io accommodate the cams IA of a grip disk 15 (tool for screwing in the dowel), the remaining third hole is used to secure the nail 8. A large head plate 9 ensures a good hold.

Fig. 3 shows a screw anchor in natural size

Can be manufactured as a plastic injection-molded part, with a spiral-shaped thread 4 which winds around the cylindrical shaft 1 and has outwardly tapered thread flanks 3 with a saw-shaped thread crest 4, with the thread running out into the conical dowel tip 11 for a secure cut.

Fig. 4 shows the dowel head plate 9 with the holes 10, 8 and 6 described in Fig. 2.

Of course, the embodiments described can be modified in many ways without departing from the basic idea of the invention.

This type of anchor was primarily designed and developed to ensure that any facade design can be achieved simply and cost-effectively, storm-proof and permanently, even with selected energy saving and heat recovery with ventilated 10 cm thick full thermal insulation.

List of reference symbols:

1 cylindrical shaft 12 hole for injection

2 spiral thread 13 full thermal insulation

3 pointed thread flanks 14 cams to 15

4 saw-shaped thread comb 15 grip disc

5 Thread runout

6 Core drilling

7 Fixing pin

8 Nail securing

9 Headstock

10 Hole to 14-15

11 conical dowel tip

Claims (1)

Qnclaims 1. Screw dowel for fastening the Eternit shingles on full thermal insulation facades, which allows a permanent and storm-proof fastening of any cladding elements, characterized in that the screw dowel is manufactured as a plastic injection-molded part, has a large head plate 9 with a cylindrical shaft 1, which has spiral threads 2, the tapered thread flanks of which are designed with a saw-shaped thread comb and run out accordingly at the dowel end in the conical part 11; that a continuous dowel core hole 6 allows an injection 12 to be achieved to stabilize the surrounding material 13 and permanently holds the fastening pin 7 of the facade cladding 16; that a nail or wire pin lock 8 prevents the screw anchor from coming loose; that with the help of two cams 14 which are fastened in a grip disk 15 and can be inserted into the holes 10 of the head plate 9, the threaded part 2 is screwed in in a self-tapping manner by rotating the same with slight pressure.