Belt roller for an elevator system

Abstract

In an elevator system, a belt-type carrier is guided over a pulley. In this case, longitudinal elevations of the belt-type carrier engage into longitudinal recesses on a roller contact surface. The roller has at least one retaining element, which is arranged laterally to the contact surface. In this case, a distance between an outermost longitudinal recess and the retaining element is less than half a longitudinal recess width of the roller contact surface.

Claims

1. An elevator system in which a belt-type carrier means is guided over a roller, wherein longitudinal elevations of the belt-type carrier means engage into longitudinal recesses of a contact surface of the roller, comprising: the roller having at least one retaining element arranged laterally with respect to the longitudinal recesses of the roller contact surface, where the retaining element has a guide surface that is inclined by an angle relative to a line perpendicular to an axis of rotation of the roller, and the guide surface is inclined toward the belt-type carrier means as the guide surface extends away from the axis of rotation; wherein a distance between an outer one of the longitudinal recesses and the at least one retaining element is less than half a width of the outer longitudinal recess of the roller contact surface; and wherein an edge of the at least one retaining element exposed in a direction of the roller contact surface is rounded, the edge being an outermost edge of the retaining element relative to the axis of rotation of the roller.

2. The elevator system according to claim 1 wherein the distance between the outer longitudinal recess and the at least one retaining element is less than 80% of half the width of the outer longitudinal recess.

3. The elevator system according to claim 1 wherein a height of the carrier means is approximately equal to a height of the at least one retaining element.

4. The elevator system according to claim 1 wherein the angle is between 3° and 7°.

5. The elevator system according to claim 1 wherein the at least one retaining element and another retaining element are arranged on opposite sides of the roller contact surface.

6. The elevator system according to claim 1 wherein the roller is a drive roller and wherein the roller contact surface is a traction surface.

7. The elevator system according to claim 1 wherein the roller is a car deflection roller or a counterweight deflection roller.

8. The elevator system according to claim 1 wherein the longitudinal elevations of the belt-type carrier means are V-ribs and wherein the longitudinal recesses of the roller contact surface are V-grooves.

9. The elevator system according to claim 1 wherein the longitudinal elevations of the belt-type carrier means have a semi-circular cross-section and wherein the longitudinal recesses of the roller contact surface have a semi-circular cross-section.

10. The elevator system according to claim 1 wherein a number of the longitudinal elevations of the belt-type carrier means is the same as a number of the longitudinal recesses of the roller contact surface.

11. The elevator system according to claim 1 wherein the roller and the at least one retaining element are formed as a single piece.

12. The elevator system according to claim 1 wherein the distance between the outer longitudinal recess and the at least one retaining element is less than 20% of half the width of the outer longitudinal recess.

13. The elevator system according to claim 1 wherein the angle is between 0° and 15°.

14. An elevator system comprising: a belt-type carrier means supporting at least one of a car and a counterweight; a roller over which the carrier means is guided, wherein longitudinal elevations of the carrier means engage into longitudinal recesses of a contact surface of the roller; the roller having at least one retaining element arranged laterally with respect to the longitudinal recesses of the roller contact surface, where the retaining element has a guide surface that is inclined by an angle relative to a line perpendicular to an axis of rotation of the roller, and the guide surface is inclined toward the belt-type carrier means as the guide surface extends away from the axis of rotation; and wherein a distance between an outer one of the longitudinal recesses and the at least one retaining element is less than half a width of the outer longitudinal recess of the roller contact surface.

15. An elevator system in which a belt-type carrier means is guided over a roller, wherein longitudinal elevations of the belt-type carrier means engage into longitudinal recesses of a contact surface of the roller, comprising: the roller having at least one retaining element arranged laterally with respect to the longitudinal recesses of the roller contact surface; wherein a distance between an outer one of the longitudinal recesses and the at least one retaining element is less than half a width of the outer longitudinal recess of the roller contact surface; wherein the at least one retaining element has a guide surface that is inclined by an angle relative to a line perpendicular to an axis of rotation of the roller; and wherein the guide surface is inclined toward the belt-type carrier means as the guide surface extends away from the axis of rotation.

16. The elevator system according to claim 15 wherein an edge of the at least one retaining element exposed in a direction of the roller contact surface is rounded, the edge being an outermost edge of the retaining element relative to the axis of rotation of the roller.

Description

DESCRIPTION OF THE DRAWINGS

(1) The invention is explained in detail symbolically and by way of example in reference to figures. Shown are:

(2) FIG. 1 is a schematic diagram of an exemplary elevator system;

(3) FIG. 2 is a schematic diagram of an exemplary roller;

(4) FIG. 3A is a schematic diagram of an exemplary belt-type carrier means;

(5) FIG. 3B is a schematic diagram of an exemplary belt-type carrier means;

(6) FIG. 4 is a schematic diagram of an exemplary belt-type carrier means on an exemplary roller; and

(7) FIG. 5 is a schematic diagram of an exemplary retaining element.

DETAILED DESCRIPTION

(8) In FIG. 1, an exemplary embodiment of an elevator system 1 is shown. The elevator system 1 comprises a car 2, a counterweight 3, a drive 4, and a belt-type suspension means or carrier means 5. The belt-type suspension means 5 is fixed in the elevator system 1 by a first carrier means attachment element 7, guided over a counterweight deflection roller 10, guided over a drive pulley of the drive 4, guided over two car deflection rollers 8, and again attached in the elevator system 1 by a second carrier means attachment element 7.

(9) In this exemplary embodiment, the elevator system 1 is arranged in a shaft 6. In an alternative embodiment (not shown), the elevator system is not arranged in a shaft, but rather, for instance, on an exterior wall of a building.

(10) The exemplary elevator system 1 in FIG. 1 comprises a counterweight 3. In an alternative embodiment (not shown), the elevator system does not include a counterweight. In addition, numerous other embodiments of an elevator system are possible.

(11) In FIG. 2, an exemplary embodiment of a roller 4, 8, 10 is illustrated. This roller 4, 8, 10 can be used as a driver roller or as a car deflection roller or as a counterweight deflection roller in the elevator system. In the shown embodiment, roller 4, 8, 10 has two retaining elements 17. Retaining elements 17 are arranged in mirror symmetry with respect to each other. Each retaining element 17 is arranged on one side of the roller contact surface 15. In this exemplary embodiment, roller contact surface 15 comprises a plurality of longitudinal recesses 13. Roller 4, 8, 10 has at least as many longitudinal recesses 13 as the belt-type carrier means has longitudinal elevations. Roller 4, 8, 10 is arranged rotatably mounted around an axis of rotation 20.

(12) Roller contact surface 15 of roller 4, 8, 10 from the exemplary embodiment in FIG. 2 is designed so that it can work together with a belt-type carrier means 5 according to FIG. 3B. Belt-type carrier means 5 in the exemplary embodiment according to FIG. 3B comprises a plurality of longitudinal elevations 33 in the form of V-ribs. Theses V-ribs are dimensioned so that they can engage complementarily into longitudinal recesses 13 of contact surface 15 of the roller according to FIG. 2. Belt-type carrier means 5 in FIG. 3B comprises a plurality of tension members 32 and a sheath 31 arranged around the tension members. In this arrangement, tension members 32 are arranged on a common level. Longitudinal elevations 33 are thus raised above this common level of tension members 32.

(13) In FIG. 3A, an alternative belt-type carrier means 5 is illustrated by way of example. In contrast to the belt-type carrier means according to FIG. 3B, longitudinal elevations 33 in this exemplary embodiment are designed as elevations having a semicircular cross-section. Here, tension members 32 are at least partly arranged in these longitudinal elevations 33. Sheath 31 encloses all tension members 32 and thus connects tension members 32 into a common belt-type carrier means 5. Not shown is a roller to work with belt-type carrier means 5 according to the exemplary embodiment in FIG. 3A. Instead of v-shaped longitudinal recesses 13, as are shown in FIG. 2, such a roller would have longitudinal recesses with a semicircular cross-section.

(14) In addition to belt-type carrier means shown by way of example in FIGS. 3A and 3B, a whole array of additional belt-type carrier means 5 having longitudinal elevations is possible. Clearly, a different embodiment is also possible in terms of the number of tension members as well as a design of the sheath shape. The tension members can additionally be arranged in different ways in the sheath. For example, a plurality of tension means can be arranged per longitudinal elevation or there can be exactly one tension means provided per longitudinal elevation. The arrangement of longitudinal elevations can also be chosen independently of the arrangement of tension members.

(15) In FIG. 4, a section of an exemplary roller 4, 8, 10 is shown, as well as a section of a belt-type carrier means 5 that works with it. Here, belt-type carrier means 5 has thus partly climbed out of longitudinal recesses 13 and is prevented from additional lateral upward movement by retaining element 17. Due to this limitation of movement, which is ensured by retaining element 17, belt-type carrier means 5 is prevented from further lateral displacement and is again guided back into its intended position on roller 4, 8, 10.

(16) A distance 19 between an outermost longitudinal recess 13 and retaining element 17 is thus designed as less than half of the width of a longitudinal recess 18 of roller contact surface 15. This ensures that belt-type carrier means 5 cannot climb completely out of longitudinal recesses 13. Depending upon the embodiment of belt-type carrier means 5, distance 19 can be chosen smaller or larger. However, distance 19 selected should be at least large enough that a guide surface 12 of retaining element 17 does not hinder belt-type carrier means 5 in its movement over roller 4, 8, 10 during the normal operation of the elevator system.

(17) Retaining element 17 in this exemplary embodiment is essentially dimensioned in such a way that belt-type carrier means 5 in its laterally upward movement cannot protrude beyond retaining element 17. Retaining element height 14 is thus about as high as a carrier means height 16. Retaining element height 14 can be selected as a function of distance 19 and the design of belt-type carrier means 5 so that belt-type carrier means 5 can at no time surpass retaining element 17. In this exemplary embodiment, an edge of retaining element 17 is also rounded off, so that the belt-type carrier means incurs no damage in the case of possible contact from this edge.

(18) In FIG. 5, a section of an exemplary embodiment of roller 4, 8, 10 is shown. In this arrangement, guide surface 12 of retaining element 17 has an inclined design. Guide surface 12 is thus inclined at an angle 11 to a line perpendicular to the axis of rotation of roller 4, 8, 10. In this exemplary embodiment, angle 11 is about 5°. This inclination of guide surface 12 makes it possible for the laterally moving belt-type carrier means to contact guide surface 12 only tangentially, so that the least possible abrasion of the belt-type carrier means occurs. In addition, the inclination of guide surface 12 causes the belt-type carrier means to be guided back down into longitudinal recesses 13. Also in this exemplary embodiment, an edge of retaining element 17 is rounded off in order to prevent a possible damage of the belt-type carrier means.

(19) 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.