SLIDING GUIDE SHOE FOR AN ELEVATOR

Abstract

A sliding guide shoe for an elevator includes a guide shoe housing and a two-part insert inserted into the guide shoe housing. The insert includes a damping element and a sliding element for guiding an elevator car or a counterweight.

Claims

1-11. (canceled)

12. A sliding guide shoe for an elevator for transporting people or goods, the sliding guide shoe comprising: a guide shoe housing; a sliding element arranged in the guide shoe housing and having opposite ends; wherein, when the sliding guide shoe is installed in the elevator, the opposite ends are oriented as an upper end and a lower end of the sliding element; and wherein at least one of the upper end and the lower end extends in a non-horizontal course.

13. The sliding guide shoe according to claim 12 wherein at least one of the upper end and the lower end of the sliding element has a sloping course.

14. The sliding guide shoe according to claim 13 wherein the sloping course, at least in parts, forms an angle of inclination relative to a horizontal direction.

15. The sliding guide shoe according to claim 14 wherein the angle of inclination is between 5° and 45°, preferably between 10° and 30° and is particularly preferably about 17°.

16. The sliding guide shoe according to claim 14 wherein the angle of inclination is between 10° and 30°.

17. The sliding guide shoe according to claim 14 wherein the angle of inclination is approximately 17°.

18. The sliding guide shoe according to claim 13 wherein the sliding element is formed as a U-shaped profile having two parallel running side legs positioned opposite one another and a base leg connecting the side legs to one another, the side legs and the base leg each having portions forming the upper end and the lower end of the sliding element, the portions forming at least one of the upper end and the lower end having a same slope.

19. The sliding guide shoe according to claim 18 wherein at least one of the upper end and lower end of the sliding element has rounded ramp surfaces at least in the portions of the side legs.

20. The sliding guide shoe according to claim 12 wherein the sliding element has two side legs and a base leg connecting the side legs to one another, and wherein the side legs each are connected to the base leg by a film hinge such that the side legs and the base leg are foldable relative to one another.

21. The sliding guide shoe according to claim 12 wherein the sliding element is shaped such that in an unfolded form the sliding element has a diamond-shaped outer contour when the sliding element spread out or laid down on a plane.

22. The sliding guide shoe according to claim 12 wherein the sliding element has a base leg with an inner side of a round cross section.

23. The sliding guide shoe according to claim 12 wherein the sliding element is a component of a two-part insert, the insert having a damping element arranged between the sliding element and the guide shoe housing.

24. The sliding guide shoe according to claim 12 wherein the sliding element has at least one retaining cam received in a hole formed in an annular buffer element, the annular buffer element forming a pin engaging in a bore in the guide shoe housing, and the pin having a profiled configuration.

25. A sliding guide shoe for an elevator for transporting people or goods, the sliding guide shoe comprising: a guide shoe housing; an insert arranged in the guide shoe housing; wherein the insert includes a sliding element having opposite ends and a damping element, the damping element being arranged between the sliding element and the guide shoe housing; wherein, when the sliding guide shoe is installed in the elevator, the opposite ends are oriented as an upper end and a lower end of the sliding element; and wherein at least one of the upper end and the lower end extends in a non-horizontal course.

Description

DESCRIPTION OF THE DRAWINGS

[0022] Additional advantages and individual features of the invention are made evident from the following description of an embodiment and from the drawings, in which:

[0023] FIG. 1 is a perspective view of a sliding guide shoe according to the invention,

[0024] FIG. 2 shows a damping element of the sliding guide shoe according to FIG. 1 in an enlarged perspective view,

[0025] FIG. 3 shows a sliding element of the sliding guide shoe according to FIG. 1 in an enlarged perspective view but from a different viewing direction and in a slightly unfolded state,

[0026] FIG. 4 is a side view of a side leg of the sliding element, and

[0027] FIG. 5 is a top view of the sliding element laid down on a plane.

DETAILED DESCRIPTION

[0028] FIG. 1 shows a sliding guide shoe, designated with 1, for an elevator (not shown here) for transporting people or goods. The elevator can be an elevator car which is vertically guided between two guide rails (not shown) serving as linear guides and can be moved up and down in an elevator shaft in the z-direction Z. At least the sliding guide shoe, described in detail below, for guiding the car can be arranged on each side of the car. For optimal guidance, elevator cars usually have four (two per side) or more sliding guide shoes. Likewise, a counterweight (likewise not shown), which is connected to the car via suspension means in the form of ropes or belts, can have these sliding guide shoes for guiding the counterweight on counterweight guide rails.

[0029] The sliding guide shoe assigned to the elevator car or the counterweight can have a groove for guiding, which groove surrounds a blade of a guide rail assigned to the elevator shaft. This blade can be an extension of a profile. The sliding guide shoe described in detail below is designed for a guide rail formed from sheet metal. The groove of the sliding guide shoe surrounds a relatively narrow blade which is, for example, a closed fold created by sheet metal bending processes. However, the guide rail could also be formed by a T-profile. The T-profile can be, for example, a fully walled steel profile made by rolling. The guide rail can also consist of or have other metallic materials (e.g., aluminum), manufacturing processes or profile shapes. For example, metal profiles manufactured by extrusion can be used as guide rails.

[0030] As can be seen from FIG. 1, the sliding guide shoe 1 comprises a guide shoe housing 2 having a one-piece configuration and an insert 3 inserted therein. The insert 3 is designed in two parts and has a sliding element 5 facing the guide rail as the inner insert part and a damping element 4 as the outer insert part. The sliding element has sliding surfaces or sliding regions that slide along the guide rail with little play when the car is traveling. A planar sliding surface designated with 27 can be seen in FIG. 1.

[0031] The sliding element 5 has an upper end 20 and a lower end 21 when the sliding guide shoe 1 is installed in the elevator ready for use. The upper and lower ends 20, 21 are connected to one another by longitudinal edges 24 running vertically or in the z-direction. Both the upper and the lower end 20, 21 each have a non-horizontal course along the associated end. The aforementioned course along the upper end 20 extends in an upwardly sloping manner starting from the longitudinal edge 24, which defines a starting point indicated with S, up to an end point at the opposing longitudinal edge (cf. FIG. 3 below, in which the aforementioned end point is indicated with E). The lower end 21 has a similar sloping course. The angle of inclination which is formed by the sloping upper lower end 20 of the sliding element 5 relative to the horizontal is denoted by α. The angle of inclination α can also be between 5° and 45°, and preferably between 10° and 30°. In the present embodiment, the angle of inclination α is 17°, at which angle of inclination a particularly low-vibration and low-noise travel of the elevator car can be efficiently ensured even in the case of unfavorable rail joints. A further advantage of the sliding element 5 is that the sliding element is characterized by optimized wear behavior, especially when used on guide rails with little or no oil and in particular with sheet metal rails.

[0032] The sliding element 5 is, for example, made of a plastics material that is characterized by a low coefficient of friction such as PTFE, UHMW-PE. In addition, preference should be given to a material for the sliding element 5, which is characterized by a low stick-slip tendency, i.e., a small or minimal difference between sliding and static friction.

[0033] For example, an elastic plastics material, in particular a thermoplastic elastomer (TPE) or a plastics material made from crosslinked elastomers, can be used for the damping element 4. The damping element 4 can be made from SBR, TUR, TPU, EPDM, NBR, NR, for example. For specific applications, it is also conceivable to use foamed plastics materials for the damping element 4. It should also be noted that materials are preferably used for the damping element 4, which are stable against the frequently used rail oil.

[0034] The guide shoe housing 2, in whose channel-like receptacle forming the aforementioned groove the insert 3 is inserted, is connected to the elevator car or the counterweight. In the present embodiment according to FIG. 1, the guide shoe housing 2 is designed as a relatively simple metal profile with a U-shaped cross section.

[0035] The guide shoe housing 2 has two parallel running side wall portions 17 situated opposite one another and a bottom portion 18 connecting the side wall portions. The bottom portion and the side wall portions projecting away from the bottom portion at right angles form a “U,” as can be seen in section. In the embodiment according to FIG. 1, it is further illustrated by way of indication and example that one of the side wall portions 17 is extended to form an attachment region 19 with regard to the connection to the elevator car or to the counterweight. However, instead of the simple U-profile shape, the guide shoe housing could also have other shapes; for example housing shapes as are known and familiar to a person skilled in the art, for example from DE 203 15 915 U1.

[0036] In order to secure the insert 3 in terms of position, the guide shoe housing 2 has two bores 7 which are situated opposite one another and are arranged in the parallel running side wall portions 17 of the guide shoe housing, in each of which the associated pins 6 engage. The pin 6 consists of an annular buffer element 8 assigned to the damping element 4 and of a retaining cam 13 assigned to the sliding element 5, wherein the retaining cam 13 is received within a hole, designated with 12 in FIG. 2, in the buffer element 8. The buffer element 8 of the pin 6 has a profiled outer contour that is created by raised points and forms a star. The vibration isolation achieved with these profiled pins 6 can again significantly improve traveling comfort.

[0037] It can be seen from FIG. 2 that the damping element 4 has a U-shaped profile body 10. Two annular buffer elements 8 are integrally formed on the profile body 10 and form a one-piece, monolithic component therewith. The associated buffer element 8 has a star-shaped cross section to form the profiling. The profiling of the pin 6, which extends with the pin in an axial direction, has webs 11 which are distributed evenly over the circumference and point radially outward.

[0038] Details on the configuration of the sliding element 5 can be found in FIGS. 3 to 5. As can be seen from FIG. 3, the sliding element 5 is designed as a U-shaped profile, at least in the operating position, having two side legs 22 situated opposite one another and a base leg 23 connecting them to one another. The sliding element 5 is configured to be foldable. The side legs 22 are each hinged to the base leg 23 via film hinges 25. FIG. 3 shows the sliding element 5 in a position before it is inserted into the damping element 4 or before it is installed in the guide shoe housing. In this position, the sliding element 5 is still slightly folded out as compared to when it is in the operating position; i.e., after installation, the side legs 22 run parallel to one another. The retaining cams 13 of the sliding element 5 are configured as solid cylinders.

[0039] The sliding element 5 is configured as a one-piece plastics material part that can be easily manufactured using injection molding processes. Of course, other manufacturing processes are also possible. For example, it is conceivable to produce the sliding element 5 in an additive method (e.g., 3D printing). Machining production methods (especially for sliding elements made of UHMPE, for example) can also be considered. For example, it may be advantageous to first produce sliding elements using the injection molding method and then partially or completely rework them. Thanks to this post-processing, the sliding surfaces can be manufactured precisely, which means that the running-in behavior can be accelerated and the elevator has better riding comfort right from the start.

[0040] The sliding element 5 has a base leg 23 which has an inner side 26 that has a round cross section and faces an end face of the guide rail to create an optimal sliding surface for rounded guide rails. The sliding surfaces 27 on the side-leg-side 22 that are situated next to the inner side 26 have a flat design.

[0041] The upper and lower ends 20, 21 of the sliding element 5 have rounded ramp surfaces 28 in the side-leg-side portions. FIG. 4 shows such a round ramp surface 28 facing the guide rail at the upper end 20 of the sliding element.

[0042] FIG. 5 shows the sliding element 5 after the sliding element 5 configured to be foldable has been spread out or laid down on a plane. As can be seen, the sliding element 5 is formed in such a way that it has a diamond-shaped outer contour. Instead of the diamond, other outer contour shapes would also be conceivable under certain circumstances. For example, the side-leg-side portions and the base-leg-side portion of the upper and lower ends 20, 21, respectively, could have different slopes. The alignment of the slopes for the side legs 22 and/or base legs 23 could also be different. Thus, when the sliding element 5 is spread out or laid down on a plane, it could have slopes running toward one another in the side-leg-side portions. An arrow-like structure is conceivable. The central portion, i.e., the portion of the upper and/or lower end 20, 21 of the sliding element 5 assigned to the base leg 23, could even have a horizontal course.

[0043] 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.