DE29711613U1 - Fastener - Google Patents

Description

Patent attorneys

Dr. jur. Alf-Olav Gleiss, Dipl.-Ing. Rainer Große, Dipl.-Ing. * Dr. Frhr. v. Uexküü, Dipl.-Chem. Michael Lindner, Dipl.-Ing.
Dr. Andreas Schreit,' Dipl.-Biol.

European Patent Attorneys
European Trademark Attorneys 70469 STUTTGART MAYBACHSTRASSE 6A Phone: (0711) 8145 55

Fax: (0711) 8130 32

Telex: . 72 27 72 jurad

e-mail: jurapat@aol.com

*22609 HAMBURG KÖN1GGRÄTZSTRASSE 8 Phone: (040) 80 33 97

Fax: (040) 80 52 47

In collaboration with: Patent Attorney Dip!-ing. Henry Schneider, Berlin

Utility model application

Connecting element

WISAR, Wyser + Anliker AG Steinackerstrasse 29

CH-8302 KLOTEN

t3974 GL-jm
30. Jun! tea?

- 1 connecting element

The present invention relates to a connecting element for connecting two profiles aligned at an angle to one another, of which one is designed as a hollow profile and the other with a profile web that can be freely gripped from the side, with a guide body that can be inserted into the cavity of the hollow profile and secured therein and a pressing head that is connected to the latter and can be inserted into a laterally open recess in the profile web for pressing the profile web onto a head surface of the hollow profile.

Connecting elements of the aforementioned type are known and are used in a wide variety of designs, for example in the construction of frames for boxes, such as assembly boxes for electrical control systems, fuse boxes, etc. Assembly usually requires the creation of additional screw holes which must be aligned with existing holes. The interconnected profiles often lack the desired rigidity without additional measures. Access to the fastening screws is also often problematic.

The object of the present invention was to create a connecting element for profiles aligned at an angle to one another, which is easy and problem-free to assemble despite its simple construction.

5 This object was achieved in a connecting element of the type defined at the outset by the features according to the characterizing part of claim 1.

Thanks to the expansion jaws, an optimal, stiff or rigid connection can be created by driving in, e.g. screwing in, a single expansion element without any special measures on the profiles to be connected.

Particular embodiments of the invention are defined in the dependent claims.

When constructing box frames using connecting elements according to the invention, cover angles can be used for additional stiffening, which are supported on all three abutting profiles.

The invention is explained in more detail below using embodiments shown in the drawing.

Show it:

Fig. 1 a connecting element according to the invention from the side

Fig. 2 a section through the line II-II of Fig. 1

Fig. 3 is a similar representation to Fig. 2, with a

Expansion bore with threaded section on each side;

Fig. 4 shows a purely schematic connection between two profiles at right angles to each other, and

Fig. 5 partially in section a connection between three

Profiles {using two connecting elements), with cover angles for the connection points.

Fig. 1 and 2 show a one-piece connecting element 1 designed according to the invention, consisting of a guide body 2 and a pressing head 3 connected to the latter. The pressing head 3 has two spreading jaws 4, 5 which are separated from one another by a transverse gap 6 which is open towards the free head end. The separating gap 6 is provided with a transverse, continuous core bore 7 into which a thread 7' is cut in a first longitudinal section 11. When a screw 8 is screwed in, it will run into the unthreaded section 12 at the end of the threaded section 11. Since its diameter corresponds to that of the core bore 7 (without cut thread 7 ^r ), the two spreading jaws 4, 5 are spread open and then fulfill their actual task (as described with reference to Fig. 4).

So that the connecting element 1 can be spread open from any side, as shown in Fig. 3, the core bore 7 could be provided with a threaded section 11 or 12 on both sides, which then merge into a central threadless section 13 connecting them (possible if the connecting element is sufficiently thick).

Fig. 4 of the drawing shows a section of a connection between two metal profiles 10 and 20, of which at least the profile 10 is designed as a hollow profile. The connecting element 1 is inserted into the hollow profile 10 as shown and clamped therein (e.g. by pressing the profile wall into zones A and B of the guide body 2). The protruding pressing head 3 engages behind a crossbar 12 of the profile 20 by being inserted through a laterally open recess 13 of the web 12.

If the two expansion jaws 4, 5 are now spread open by driving an expansion element 8 into the hole 7, they will tilt backwards (to the right) and press the web 12 firmly against the head side of the profile with their rear side 4', 5'. The two profiles 10 and 20 are thus firmly connected to one another in the simplest way.

Fig. 5 shows a connection between three profiles 10, 20 and 30 using two connecting elements 1. Cover angles 13 can be used to further stiffen the construction and to cover the actual connection points. These are, for example, inserted into the profile 20 from above and are supported by all three profiles 10, 20 and 30. This achieves optimal connection rigidity.

Claims (5)

- 5 Protection claims: 1. Connecting element for connecting two profiles aligned at an angle to one another, one of which is designed as a hollow profile and the other with a profile web that can be freely gripped from the side, with a guide body that can be pushed into the hollow space of the hollow profile and secured therein and a pressing head that is connected to the latter and is inserted into a laterally open recess in the profile web for pressing the profile web onto a head surface of the hollow profile, characterized in that the pressing head that forms part of the guide body has two spreading jaws that are separated from one another by a gap that is open towards the head end, the separating gap being provided with a transverse, continuous opening in order to spread the jaws open by driving a spreading element into the opening of the separating gap and thereby press the profile web of one profile against the head surface of the other profile. 2. Connecting element according to claim 1, characterized in that in the transverse direction of the separating gap a continuous core hole leads through the gap, wherein a thread is cut into a first longitudinal section of the core hole, such that when a screw is screwed into the threaded section, the latter widens the hole when it penetrates an adjoining threadless longitudinal section of the core hole and thus the jaws are spread. 3. Connecting element according to claim 2, characterized in that the core hole has a first longitudinal section with a thread at each end and these two threaded sections merge into a threadless section connecting them. 4. Box frame made of metal profiles that are adjacent to one another at right angles, characterized in that the profiles are connected to one another by means of connecting elements according to one of claims 1-3. 5. Box frame according to claim 4, characterized in that at least in the area of three abutting frame profiles the connection points are covered with cover angles which are supported on all three profiles and thus give the construction additional rigidity.