DK145832B - SOUND AND VOLTAGE INSULATING DETAILS - Google Patents

Description

in 145832

The invention relates to a sound and vibration isolating fastening element, in particular for fastening guide rails to lifts.

Known sound and vibration insulating fasteners usually consist of a rubber buffer embedded between two metal sheets. In such, for example, from "Dubbel's Taschenbuch fur den Maschi-nenbau" 13th edition, Volume 1, pages 711-712 known fastening elements, the metal sheets are provided with threaded pins or threaded holes as required. In order to enable a series of slidable mounting of multiple apparatus or structural elements, in a further development of these fastening elements, a profile rail in the form of an anchor rail connected to a metallic support profile by means of a roll-up rubber pad is known.

The requirements for sound insulation in modern buildings require that e.g. essential parts of an elevator system, such as control rails, doors, regulators, etc., are secured to 20 sound and vibration insulated, in which connection these structural elements for safety reasons in the event of fire must only change their position to a significant extent. However, this requirement does not meet the known fastening elements 25 mentioned above, since the fastened parts are no longer retained when the insulating medium is destroyed. Furthermore, in terms of material and fabrication, these fasteners are relatively expensive, and the position of the fastened parts may change with suspension during normal use.

It is therefore an object of the invention to provide an improved sound and oscillation insulating fastener which is cheaper to manufacture and which meets the aforementioned safety requirements.

This is achieved in accordance with the invention by an outer profile having a box-shaped cross-section, in which there is embedded in an insulating medium an inner profile with a box-shaped cross-section, that there are slots extending along each other along the profile length, that the inner profile on the three sides and the entire profile length is surrounded by insulating medium, so that the position of the profiles relative to each other at normal load remains unchanged and that the fourth side of the inner profile is provided with a slotted screw. in the longitudinal direction of the profile, a metallic safety plate displaceable, the thickness of which corresponds approximately to the distance between the outside of the inner profile and the inside of the outer profile.

By destroying the insulation medium, e.g. in case of fire, the structural element screwed together with the inner profile and the safety plate, due to the low clearance of the safety profile in the outer profile, can only change its position substantially, so that its function is only slightly affected, which is particularly important for the attachment of guide rails to elevators. A further advantage is that the position of the profiles relative to each other remains unchanged in normal operation, and that despite this a good attenuation of noise and oscillations is achieved, which is due to the encapsulation of the internal profile and the proposed insulation medium. The fastener according to the invention is cheaper to manufacture than known vulcanized rubber springs.

According to a cost-saving, preferred embodiment, the insulation medium consists of a polyester-based molding plastic 30. The proposed polyester molding resin, e.g. polyurethane, which joins well with sandblasted steel, is oil resistant, ozone resistant and more resistant to aging than the known fasteners equipped with vulcanized rubber dampers.

Furthermore, it is possible to provide different degrees of hardness as needed.

The invention is explained in more detail with reference to the drawing.

In the drawing, an outer profile 1 is embedded in a concrete wall 2, which has a box-like cross-section and consists of a base plate 3 and two with this welded L-profiles 4. The outer profile 10 1 is partially filled with an insulating medium 5, preferably consisting of a polyester-based molding plastic.

In the insulating medium 5 there is embedded a coaxial inner profile 6 extending with the outer profile 1, of a kind which is commercially available, the slits 15 7 and -8 in the profiles 1 and 6 being over one another and the inner profile 6 being three sides and the entire length surrounded by insulating medium 5. In the space between the slots 7 and 8 there is a preferably steel safety plate 6 which is screwed onto the inner profile 6 by means of a fastening bolt 10 and a hex nut 11. there is a gap between the safety plate 9 and the immediately adjacent inside of the outer profile 1. On the end projecting from the slot 7 in the outer profile 1 of the fastening bolt 10, a structural member 13 is secured by means of a hex nut 12. 14 provides spring washers, by means of which the hex nuts 11 and 12 are secured against loosened.

The fastening bolt 10 is a normal screw with 30 hammer heads which, when mounted, is inserted through a long hole 15 in the safety plate 9 and the slot 8 in the inner profile 6, after which the bolt is turned 90 ° to the fastening position. When tightening the hex nut 11, the square shoulder is applied