ELEVATOR TENSION ELEMENT BELT WITH FLAME-RETARDANT PROPERTIES

Abstract

A belt for drive systems includes: an elastic and flame-retardant belt body made from a polymeric material and at least one flame retardant additive, the belt body having a cover layer as a belt back and a substructure which has a force transmission zone; and a tension member embedded in the belt body, wherein the belt body is partially or completely provided with a coating, which coating is single- or multi-layered.

Claims

1-5. (canceled)

6. A belt for drive systems, comprising: an elastic and flame-retardant belt core formed of a polymeric material and at least one flame-retardant additive; a coating of at least one layer at least partially covering the belt core; and at least one tension member embedded in the belt core.

7. The belt according to claim 6 wherein the at least one flame-retardant additive is melamine phosphate, melamine polyphosphate, melamine cyanurate, ammonium polyphosphate, a halogenated organic compound, an organic phosphoric acid ester, an organic phosphonate, red phosphorus, a metal hydroxide, a metal carbonate, glass powder or quartz powder.

8. The belt according to claim 6 wherein the belt in the form of one of a flat belt, a V-belt, a ribbed V-belt, a synchronous belt and composite cables.

9. The belt according to claim 6 formed as a tension element in an elevator drive system.

10. A method for manufacturing a belt according to claim 6 including a step of partially or completely applying the coating to the belt core by one of spraying, brushing, rolling and immersion after the belt core with the at least one tension member embedded is formed.

11. A belt for drive systems, comprising: an elastic and flame-retardant belt core formed of a polymeric material and at least one flame-retardant additive; a coating of at least one layer covering the belt core; and a plurality of tension members embedded in the belt core.

Description

DESCRIPTION OF THE DRAWINGS

[0028] An exemplary embodiment of the invention is described below with reference to a schematic drawing, but the invention is by no means limited to this exemplary embodiment. In this drawing:

[0029] FIG. 1 shows a belt in the form of a flat belt with a belt core and a belt cover, which serves as a tension element for elevator systems, in cooperation with an unprofiled traction pulley.

DETAILED DESCRIPTION

[0030] FIG. 1 shows a belt 16 in the form of a flat belt that serves as a tension element for elevator systems. The material A is preferably a polyurethane and forms the belt body or core 18. The cover or coating 19 consists of a material B, preferably a PU varnish that can be subjected to high mechanical stresses. In this case, the tension member 17 is completely encased in the first material A and thereby embedded in the belt core 18. The tension member 17 preferably consists of a tension member of steel. In this particularly preferred embodiment, the coating 19 completely surrounds the belt core 18.

[0031] In accordance with the provisions of the patent statutes, the present invention has been described in what is considered to represent its preferred embodiment. However, it should be noted that the invention can be practiced otherwise than as specifically illustrated and described without departing from its spirit or scope.