Elevator installation

Abstract

An elevator installation has a car at least partially supported by a support including several electrically conductive tension-bearing elements, which elements are arranged parallel to each other and which are substantially surrounded by a jacket. The support is fastened to fastening devices, wherein the fastening devices each include a housing and a clamping element. The housing and the clamping element each have clamping surfaces, between which surfaces the support is clamped. An electrically insulating material is arranged between at least one side of the support and the clamping surfaces arranged thereon. The electrically insulating material electrically isolates the support from the housing or the clamping element or both.

Claims

1. An elevator installation having a car at least partly supported by a support including a plurality of electrically conductive tensile carriers arranged parallel to one another and substantially encased by a casing, the support having a first side and a second side, the support being fastened to support fastening devices, the support fastening devices each comprising: a housing having housing clamping surfaces; a clamping element having clamping element clamping surfaces wherein the support is clamped between the housing clamping surfaces and the clamping element clamping surfaces; and an electrically insulating material arranged at the housing clamping surfaces and the clamping element clamping surfaces to electrically separate the support from the housing and the clamping element.

2. The elevator installation according to claim 1 wherein the first side of the support is a traction side that is in contact with a drive pulley of a drive, wherein the second side of the support is a rear side and wherein the electrically insulating material is arranged between the rear side and one of the housing clamping surfaces and the clamping element clamping surfaces.

3. The elevator installation according to claim 2 wherein longitudinal ribs are formed on the traction side of the support.

4. The elevator installation according to claim 1 wherein the electrically insulating material is arranged between the first and second sides of the support and the clamping surfaces of the housing and the clamping element.

5. The elevator installation according to claim 1 wherein the electrically insulating material is formed as a film.

6. The elevator installation according to claim 5 wherein the film is inserted and clamped in place between the support and the clamping surfaces of at least one of the housing and the clamping element.

7. The elevator installation according to claim 1 wherein the electrically insulating material is formed as an adhesive tape.

8. The elevator installation according to claim 7 wherein the adhesive tape is glued to at least one of the support and the clamping surfaces.

9. The elevator installation according to claim 1 wherein the electrically insulating material is formed as a coating.

10. The elevator installation according to claim 9 wherein the coating is coated on at least one of the housing clamping surfaces and the clamping element clamping surfaces.

11. The elevator installation according to claim 9 wherein the coating is one of a powder, a wet lacquer, a ceramic, an enamelling and a polytetrafluoroethylene material.

12. The elevator installation according to claim 9 wherein the coating has a layer thickness of 5 to 1,000 micrometers.

13. The elevator installation according to claim 9 wherein the coating has a layer thickness of 10 to 500 micrometers.

14. The elevator installation according to claim 9 wherein the coating has a layer thickness of 15 to 300 micrometers.

15. The elevator installation according to claim 1 wherein the clamping element is formed as a wedge.

16. A support fastening device for an elevator installation having support belt, the support fastening device comprising: a housing having clamping surfaces; a clamping element having clamping surfaces, the support belt being clamped between the clamping surfaces of the housing and the clamping element; and an electrically insulating material coating the clamping surfaces of the housing and the clamping element wherein during use of the support belt the support belt is electrically insulated from the housing and the clamping element by the electrically insulating material.

17. The support fastening device according to claim 16 wherein the coating is one of a powder, a wet lacquer, a ceramic, an enamelling and a polytetrafluoroethylene material.

Description

DESCRIPTION OF THE DRAWINGS

(1) Details and advantages of the invention are described in the following by way of embodiments and with reference to the schematic drawings, in which:

(2) FIG. 1 shows an exemplifying form of embodiment of an elevator installation;

(3) FIG. 2 shows an exemplifying form of embodiment of a support means fastening device;

(4) FIG. 3a shows an exemplifying form of embodiment of a housing of a support means fastening device;

(5) FIG. 3b shows an exemplifying form of embodiment of a clamping element of a support means fastening device; and

(6) FIG. 4 shows an exemplifying form of embodiment of a support means.

DETAILED DESCRIPTION

(7) The elevator installation 40 illustrated schematically and by way of example in FIG. 1 includes an elevator car 41, a counterweight 42 and a support means 1 as well as a drive pulley 43 with associated drive motor 44. The drive pulley 43 drives the support means 1 and thus moves the elevator car 41 and the counterweight 42 in opposite sense. The drive motor 44 is controlled by an elevator control 45. The car 41 is designed to receive persons and/or goods and to transport them between floors of a building. The car 41 and counterweight 42 are guided along guides (not illustrated). In the example, the car 41 and the counterweight 42 are each suspended at support rollers 46. The support means 1 is in that case fixed to a first support means fastening device 47 and then initially guided around the support roller 46 of the counterweight 42. The support means 1 is then laid over the drive pulley 43, guided around the support roller 46 of the car 41 and finally connected with a fixing point by a second support means fastening device 47. This means that the support means 1 runs by way of the drive 43, 44 at a speed which, in accordance with a suspension factor, is higher than the car 41 or counterweight 42 moves. In the example the suspension factor is 2:1.

(8) A free end 1.1 of the support means 1 is provided with a contact-making device 2 for temporary or permanent contacting and monitoring of the support means 1. In the illustrated example a contact-making device 2 of that kind is arranged at both ends of the support means 1. In an alternative form of embodiment (not illustrated) only one contact-making device 2 is arranged at one of the support means ends 1.1. The support means ends 1.1 are no longer loaded by the tension force of the support means 1, since this tension force has already been conducted beforehand by way of the support means fastening devices 47 into the building. The contact-making devices 2 are thus arranged in a region, which is not rolled over, of the support means 1 and outside the loaded area of the support means 1.

(9) The illustrated elevator installation 40 in FIG. 1 is by way of example. Other suspension factors and arrangements such as, for example, elevator installations without a counterweight are possible. The contact-making device 2 for contacting the support means 1 is then arranged in correspondence with the positioning of the support means fastening devices 47.

(10) An exemplifying form of embodiment of a support means fastening device 47 with support means 1 inserted therein is illustrated in FIG. 2. The support means fastening device 47 comprises a housing 7 and a clamping element 8 arranged therein. The housing is fastened to an element in the elevator installation by way of a threaded rod 9. The support means fastening device 47 can be connected by way of the threaded rod 9 with, for example, a car, a counterweight or a support.

(11) The support means 1 inserted into the support means fastening device 47 has a loaded side and a free support means end 1.1. The support means 1 is clamped in place in the support means fastening device 47 by clamping surfaces 17, 18 of the clamping element 8 and the housing 7.

(12) A clamping element 8 and a housing 7 are illustrated in FIGS. 3a and 3b. The clamping surfaces 17, 18 of the clamping element 8 and the clamping surfaces 14, 15 of the housing 7 are in that case coated with the electrically insulating material 3.

(13) The electrically insulating material 3 is thus arranged between at least one side of the support means 1 and the clamping surfaces 14, 15, 17, 18 arranged thereat. The electrically insulating material 3 can therefore be arranged—in a first embodiment (not illustrated)—between the support means and the clamping surfaces 17, 18 of the clamping element 8, or—in a second embodiment (similarly not illustrated)—between the support means 1 and the clamping surfaces 14, 15 of the housing 7—or in a third embodiment, which is illustrated in FIGS. 3a and 3b—between the support means 1 and the clamping surfaces 14, 15, 17, 18 of the housing 7 and the clamping element 8. The electrically insulating material 3 thus separates the at least one side of the support means 1 from the housing 7 or the clamping element 8.

(14) An exemplifying form of embodiment of a support means 1 is illustrated in FIG. 4. The support means 1 comprises a plurality of mutually parallel electrically conductive tensile carriers 5 encased by a casing 6. The support means 1 has a first side 10 and a second side 11. In that instance the first side 10 of the support means 1 is formed as a traction side disposed in contact with a drive pulley of a drive. The second side 11 of the support means 1 is formed as a rear side. In this embodiment the traction side 10 has longitudinal ribs. Such longitudinal ribs serve on the one hand for improved traction of the support means 1 on the drive pulley and on the other hand for increased protection of the tensile carriers 5.

(15) 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.