Suspension anchoring in an elevator system

Abstract

An elevator system has at least one elevator car and at least one counterweight connected by a suspension device, both of which can be counter-directionally displaced at at least one guide rail in an elevator shaft via a traction sheave of a drive. At least one pivotable suspension anchoring is adaptable to displacements of the suspension device according to a displacement angle wherein a rolling body moves on a holding plate.

Claims

1. A support fastening for a plurality of supports in an elevator installation, wherein each support of the plurality of supports is connected with a respective associated tie rods of a plurality of tie rods by a respective end connection, the support fastening comprising: a rollable body supporting all of the respective associated tie rods; and a mounting plate carrying said rollable body wherein the support fastening is adaptable to deflections of the plurality of supports in correspondence with a deflection angle, wherein said rollable body rolls on a flat rolling surface of sold mounting plate in dependence on the deflection angle.

2. The support fastening according to claim 1 including a force storage element arranged at the respective associated tie rods and acting on said rollable body.

3. The support fastening according to claim 2 wherein said force storage element is a gas compression spring with a cylinder and a piston rods and said piston rod functions as said respective associated tie rod and is connected with the end connection.

4. The support fastening according to claim 3 wherein said piston rod has a pivot eye and the end connection is pivotably arranged in said pivot eye.

5. The support fastening according to claim 3 wherein said rollable body is integrated in said cylinder.

6. The support fastening according to claim 1 wherein said mounting plate has a conical bore through which the respective associated tie rods are led.

7. The support fastening according to claim 1 wherein said mounting plate has a bore formed therein with at least two stepped and concentrically arranged individual bores with different diameters and the respective associated tie rods are led through the bore.

8. The support fastening according to claim 1 wherein said mounting plate has a bore formed as a slot through which the respective associated tie rods are led.

9. The support fastening according to claim 1 wherein said rollable body is rollable by a curved rolling surface formed on said rollable body.

10. The support fastening according to claim 9 wherein said rollable body rolling surface and said mounting plate rolling surface are formed with interengaging toothing.

11. The support fastening according to claim 9 wherein said rollable body rolling surface has a sectional profile corresponding with a parabola according to an equation f(x)=a x.sup.n, wherein at least one of 0<a<1 and n is an even number.

12. The support fastening according to claim 9 wherein said rollable body rolling surface has a sectional profile with a central section having a radius greater than radii of two sections flanking the central section.

13. The support fastening according to claim 9 wherein said rollable body rolling surface has at least two abutments formed adjacent thereto.

14. The support fastening according to claim 1 wherein the support fastening is adapted to be arranged at any of a stationary fastening point in an elevator shaft, an elevator car and a counterweight.

15. The support fastening according to claim 1, further comprising a plurality of parallel support means, where each support means is coupled to a respective associated tie rods.

16. A support fastening for a plurality of supports in an elevator installation, wherein each support, of the plurality of supports is connected with a respective associated tie rods of a plurality of tie rods by a respective end connection, the support fastening comprising: a rollable body supporting all of the respective associated tie rods and having a curved rolling surface formed on said rollable body; and a mounting plate carrying said rollable body wherein the support fastening is adaptable to deflections of the plurality of supports in correspondence with a deflection angle, wherein said curved rolling surface of said rollable body rolls on a flat rolling surface of said mounting plate in dependence on the deflection angle.

17. The support fastening according to claim 16 wherein said rollable body rolling surface has a sectional profile corresponding with a parabola according to an equation f(x)=a x.sup.n, wherein at least one of 0<a<1 and n is an even number.

18. The support fastening according to claim 16 wherein said rollable body rolling surface has a sectional profile with a central section having a radius greater than radii of two sections flanking the central section.

19. The support fastening according to claim 16 wherein said rollable body rolling surface has at least two abutments formed adjacent thereto.

20. The support fastening according to claim 16, further comprising a plurality of parallel support means, where each support means is coupled to a respective associated tie rods.

Description

DESCRIPTION OF THE DRAWINGS

(1) The invention is explained in more detail symbolically and by way of way of example on the basis of figures. The figures are described conjunctively and in general. The same reference numerals signify the same components and reference numerals with different indices indicate functionally equivalent or similar components.

(2) In that case:

(3) FIG. 1 shows a schematic illustration of an elevator installation according to the prior art with a 2:1 cable guidance for an elevator car and a counterweight;

(4) FIG. 2 shows a schematic detail illustration of a pivotable support means fastening according to the prior art;

(5) FIG. 3a shows a schematic detail illustration of a pivotable support means fastening according to the invention for three support means guided in parallel;

(6) FIG. 3b shows a schematic and sectional detail illustration of a slightly different, but identical in principle, design variant of a pivotable support means fastening according to the invention;

(7) FIG. 4a shows a schematic illustration of a rollable body according to the invention;

(8) FIG. 4b shows a schematic illustration of a design variant of the rollable body according to the invention with a toothing;

(9) FIG. 4c shows a schematic illustration of a further design variant of the rollable body according to the invention;

(10) FIG. 5 shows a schematic illustration of a further design variant of a pivotable support means fastening according to the invention with a gas compression spring; and

(11) FIG. 6 shows a schematic illustration of a further design variant of a pivotable support means fastening according to the invention with a support sleeve instead of a force storage element.

DETAILED DESCRIPTION OF THE INVENTION

(12) FIG. 1 shows an elevator installation 100 such as is known from the prior art. An elevator car 2 is arranged to be movable in an elevator shaft 1 and is connected by way of a support means 3 with a movable counterweight 4. During operation of the elevator installation 100 the support means 3 is driven by a drive pulley 5 of a drive unit 6, which are arranged in the uppermost region of the elevator shaft in an engine room 12. The elevator car 2 and the counterweight 4 are guided by means of guide rails 7a or 7b and 7c extending over the shaft height.

(13) The elevator car 2 can serve an uppermost floor 8, further floors 9 and 10 and a lowermost floor 11 over a transport height h. The elevator shaft 1 is formed from shaft side walls 15a and 15b, a shaft ceiling 13 and a shaft floor 14, on which a shaft floor buffer 22a for the counterweight 4 and two shaft floor buffers 22b and 22c for the elevator car 2 are arranged.

(14) The support means 3 is fastened in stationary position at the shaft ceiling 13 or in stationary position at the shaft side wall 15a and led parallelly to the shaft side wall 15a to a support roller 17a for the counterweight 4. From here in turn the support means 3 is led back over the drive pulley 5, further to a support roller 17b for the elevator car 2 and to a second stationary fastening at the shaft ceiling 13 or at the shaft side wall 15b.

(15) In the stationary fastenings the support means 3 is respectively fastened by a support means end connection 19a or 19b to a tie rod 18a or 18b. The tie rods 18a and 18b areeach loaded by a respective compression spring 21a or 21brespectively supported on a mounting plate 20a or 20b arranged in stationary position. The mounting plates 20a and 20b are, for example, arranged at the shaft side walls 15a and 15b, at the shaft ceiling 13, at at least one guide rail 7a, 7b, 7c or at a drive bracket (not illustrated in more detail).

(16) The counterweight 4 is illustrated by a solid line in a lowermost shaft position PG.sub.t and correspondingly the elevator car 2 in a highest shaft position PK.sub.h. The counterweight 4 is shown in dashed lines in a highest shaft position PG.sub.h and the elevator car 2 in a lowermost shaft position PK.sub.t. Particularly in the case of stationary fastening of the section, which is at the car side, of the support means 3 the lowermost shaft position PK.sub.t of the elevator car 2 and the highest shaft position PK.sub.h of the elevator car 2 mean that the support means 3 forms a maximum deflection angle AW.sub.max.

(17) FIG. 2 schematically shows a pivotable support means fastening 33 known from the prior art. A support means end connection (not illustrated) is connected with a tie rod 18c which is led through a bore 24 in a mounting plate 20c, further through a further bore 24a in a hemisphere 23 and through the coils of a helical compression spring 21c. The helical compression spring 21c is fixed by a washer 26, a nut 27, a lock nut 28 and a cotter pin 29 against a support surface 30 of the hemisphere 23. The hemisphere 23 is seated in a concavely shaped seat 25. Pivotation of the support means fastening 33 in correspondence with a deflection angle AW.sub.1 between a perpendicular S and an axis A of the tie rod 18c is subject on the one hand to high friction forces between the surface of the hemisphere 23 and the concave surface of the seat 25 and on the other hand is limited by contact of the tie rod 18c with the flanks of the bore 24.

(18) A pivotable support means 33a according to the invention for three parallelly guided support means 3a-3c is illustrated in perspective view in FIG. 3a. The three support means 3a-3c are respectively fastened by support means end connections 19c-19e to respective tie rods 18d-18f, which are led through bores 24b-24d in a mounting plate 20d, which is arranged in stationary position, and corresponding bores (not illustrated) in a rollable body 31a.

(19) Deflection movements of the support means 3a-3c or of the support means end connections 19c-19e lead to pivot movement of the tie rods 18d-18f and this pivot movement in turn leads to rolling of the rollable body 31a on a flat rolling surface 34 of the mounting plate 20d.

(20) The rollable body 31a additionally has a support surface 30a for lower fixing sleeves 32a-32c for respective helical compression springs 21d-21f, which in turn are each mounted by means of a respective upper fixing sleeve 35a-35c, nut 27a-27c, lock nut 28a-28c and split pin 29a-29c under bias.

(21) FIG. 3b shows a schematic and sectional detail illustration of a pivotable support means fastening 33b according to the invention which is pivoted through the deflection angle AW.sub.1 formed between the perpendicular S and the axis A of a tie rod 18g. The tie rod 18g is led through a bore 24e in a mounting plate 20e and through a further bore 24f in a rollable body 31b.

(22) The bore 24e in the mounting plate 20e consists of two individual bores with different diameters so that the tie rod 18g can describe larger adjustment angles without hitting the flanks of the bore 24e.

(23) By contrast to the rollable body 31a of FIG. 3a the rollable body 31b does not have a support surface for a lower fixing sleeve 32d or for a helical compression spring 21g. However, the rollable body 31b has a rollable body rolling surface 36 which in the case of pivot movements of the support means fastening 33b rolls on a rolling surface 34a of the mounting plate 20e.

(24) The lower fixing sleeve 32d can optionally also be so designed that the lowermost diameter thereof below the collar embraces the tie rod 18g along the entire length of the bore 24f, preferably by means of a clearance fit which allows movement of the tie rod 18g along the axis A thereof, but frees as little as possible lateral movement transversely to the axis A.

(25) FIG. 4a schematically shows in partly sectional detail illustration the functioning of a support means fasting 33c according to the invention or of a rollable body 31c according to the invention with a concentric round rollable body rolling surface 36a during rolling on a flat rolling surface 34b of a mounting plate 20f. The rollable body 31c is illustrated by solid line in a vertical position in which the perpendicular S and the axis A coincide. The rollable body 31c thus stands at a contact point 37. As soon as a pivot movement in correspondence with a deflection angle AW.sub.2 of, preferably, 6 degrees takes place the rollable body 31c adopts a position which is illustrated by dashed lines. In this new position of the rollable body 31c the rollable body 31c stands at a new contact point 37 shifted to the left. It is apparent that a pivoted axis A of its intersection point with the line representing the rolling surface 34b of the mounting plate 20f has hardly shifted. This is an indication of the fact that transmission of the holding force for the support means along the axis A is also ensured in this position and a possible restoring moment remains negligibly small.

(26) A schematic sectional detail illustration of a design variant according to the invention of a pivotable support means fastening 33d is shown in FIG. 4b, which in favor of a pivotability of significantly more than 6 degrees has an interengaging toothing, which imparts lateral stability, at a rollable body rolling surface 36b of a rollable body 31d and at the same time at a rolling surface 34c of a mounting plate 20g.

(27) FIG. 4c schematically shows in a sectional detail illustration a further design variant of a pivotable support means fastening 33e according to the invention. This design variant is distinguished by the fact that supported on a rolling surface 34d, which as before in FIGS. 3a, 3b and 4a is flat, of a mounting plate 20h is a rollable body 31e of which the rollable body rolling surface 36c is not concentrically round, but flattened centrally, i.e. on both sides about an axis A1. In other words, the rollable body rolling surface 36c forms a central section 38b with a radius Rb which is greater than the radii Ra and Re of two sections 38a and 38c. The latter sections 38a and 38c flank the central section 38b on both sides and seamlessly merge into the curvature of the central section 38b. The two lateral sections 38a and 38c quasi represent two shoulders which, as illustrated by dashed lines, on attainment of a deflection angle AW.sub.3 towards an axis A1 act with a progressively increasing restoring moment RM in the direction of the original alignment of the support means fastening 33e.

(28) An exemplifying mathematical function which illustrates the sectional profile of the rollable body rolling surface 36c according to the invention is a parabola which is compressed by way of its power and/or a fraction quotient. Thus, a mathematical function is, for example, f.sub.(x)=a x.sup.n, wherein 0<a<1 and n is an even number. Thus, for example f.sub.(x)=0.1 x.sup.2 or f.sub.(x)=0.5 x.sup.4.

(29) FIG. 5 shows schematically and in a partly sectional detail illustration a further design variant according to the invention of a pivotable support means fastening 33f with a gas compression spring 40 which comprises a cylinder 41 and a piston rod 42. The spring 40 functions as a force storage element as do the springs 21d-21g. The piston rod 42 preferably has at the lower end thereof a pivot eye 43a in which the support means end connection is preferably fastened to be pivotable. The cylinder 41 similarly optionally has at its upper end a pivot eye 43b, which can prove useful in the case of initial mounting or possible demounting for an exchange, but can be subsequently removed in favor of a low constructional height of the support means fastening 33f.

(30) The gas compression spring 40 or the support means fastening 33f has a force action point KAP which is significantly lower than the force action point of the design variant with helical compression springs. In the case of the latter, it lies at, in particular, the nut which holds the helical compression spring at the upper end (see the nuts 27a-27c at the tie rods 18d-18f in FIG. 3a).

(31) The cylinder 41 is supported on a support surface 30b at or around a bore 24h of a rollable body 31f. The rollable body 31f can optionally also be formed directly integrally with the cylinder 41 and has a rollable body rolling surface 36d which in the previously disclosed manner is rollable on a flat rolling surface 34e of a mounting plate 20i.

(32) The mounting plate 20i preferably has a bore 24g consisting of several stepped and concentrically arranged individual bores. This form of bore ensures a wide capability of pivotation of the piston rod 42 with optimum material strength of the mounting plate 20i in the region around the bore 24g. As already mentioned, the bore 24g can also be formed as a slot which corresponds in its longitudinal direction with the deflection direction of the piston rod 42.

(33) Moreover, this design variant comprises two abutments 39a and 39b at the rollable body 31f, which block deflection of the support means fastening 33f beyond a specific angle. These abutments 39a and 39b can also be combined with all previously depicted design variants of rollable bodies 31.

(34) A further design variant of a pivotable support means fastening 33g according to the invention is shown in FIG. 6 schematically and in partially sectioned detail illustration. A tie rod 18h is led through a bore 24i in a mounting plate 20j, wherein the bore 24i is here shaped in the form of a slot, the longitudinal direction of which corresponds with the deflection of the tie rod 18h, which in turn corresponds with the drawing plane in the illustrated figure. By contrast to the previously illustrated central bores the slot 24i on the one hand gives an increased pivot angle, but on the other hand yet a further advantage: there are no longer edges of a (round, central) bore which could mutually hook with the edges of a bore 24j in the rollable body 31g, because the slot 24i forms two webs, of which in the illustrated sectional illustration only a rear web 46 is visible, which intersects an axis A of the tie rod 18h.

(35) The tie rod 18h can, as illustrated in FIG. 3a, be fastened to a thread of the tie rod by nuts. As shown in this FIG. 6, the tie rod can, however, also form a tie rod head 45 by which it holds a support sleeve 44 which in turn is supported on a support surface 30c of a rollable body 31g. The support sleeve 44 can consist of a rigid material or, however, can also be made of a defined and preferably only slightly flexible material.

(36) As already mentioned, however, a further variant of embodiment according to the invention is also conceivable in which the tie rod head 45 is supported directly on the support surface 30c of the rollable body 31g or even a more developed design variant in which the tie rod head 45 directly forms rollable body rolling surfaces 36e and 36f.

(37) 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.