Elevator alignment tool

Abstract

An elevator alignment tool includes a longitudinal frame having rollers being configured to run along the surface of a guide rail of an elevator construction, which frame includes a bias device for biasing the frame against the guide rail and a connecting part configured to be connected to an elevator car or an installation time platform, which tool further includes a laser mounted to the frame. This alignment tool allows an easy alignment of new guide rails to be installed during elevator installation or an easy verification of the guide rail alignment of a ready built elevator construction.

Claims

1. An elevator alignment tool comprising: a frame having rollers being configured to run along the surface of a guide rail of an elevator construction, the frame comprising a bias device configured to bias the frame against the guide rail and a connecting part configured to be connected to an elevator car or an installation time platform, the elevator alignment tool further comprises a laser mounted to the frame.

2. The elevator alignment tool according to claim 1, wherein the connecting part is a rope configured to be connected with an elevator car sling for the elevator car or the installation time platform.

3. The elevator alignment tool according to claim 2, wherein the bias device comprises at least one magnet.

4. The elevator alignment tool according to claim 2, wherein the frame is an L-profile, wherein both flanks of the L-profile have at least two rollers and the bias device is provided in plurality such that each flank includes at least one bias device of the plurality of bias devices.

5. The elevator alignment tool according to claim 1, wherein the bias device comprises at least one magnet.

6. The elevator alignment tool according to claim 5, wherein the at least one magnet is fixed to the frame on a first side facing the guide rail and has a thickness less than an extension of the rollers from the frame in a direction towards the guide rail.

7. The elevator alignment tool according to claim 1, wherein the frame is an L-profile, wherein both flanks of the L-profile have at least two rollers and at least one bias device.

8. The elevator alignment tool according to claim 1, wherein the laser is mounted to the frame so that a laser beam is emitted parallel to a longitudinal axis of the frame.

9. The elevator alignment tool according to claim 1, wherein a horizontal mounting plate is connected to the frame for fixing of the laser to the frame.

10. The elevator alignment tool according to claim 1, wherein the frame has a first side facing the guide rail and a second side opposite to the guide rail, and wherein bearing mountings for the rollers are mounted on the second side of the frame, and wherein the frame has a perforation for each roller so that each roller extends from the second side through the perforation to the first side.

11. The elevator alignment tool according to claim 10, wherein a distance of a roller axle in the bearing mounting from the second side of the frame is such that each roller extends through the perforation to the first side of the frame by a distance which is slightly larger than a thickness of a magnet fixed to the first side of the frame, and wherein the magnet is the bias device.

12. The elevator alignment tool according to claim 1, wherein the laser is mounted to the frame so that a laser beam is emitted parallel to a longitudinal axis of the frame in the upper direction.

13. The elevator alignment tool according to claim 1, wherein the connecting part is a rope or chain configured to be connected with an elevator car sling for the elevator car or the installation time platform and the elevator tool is configured to be located below the elevator car.

14. An elevator comprising an elevator car moving along an elevator guide rail and an elevator alignment tool, wherein the elevator alignment tool includes a frame having rollers being configured to run along the surface of the guide rail, the frame comprises a bias device configured to bias the frame against the guide rail and a connecting part configured to be connected to the elevator car, and wherein the elevator alignment tool further comprises a laser mounted to the frame.

15. The elevator according to claim 14, wherein the elevator alignment tool is mounted to a bottom of the elevator car.

16. The elevator according to claim 14, wherein the connecting part of the elevator alignment tool is connected to a car sling of the elevator car.

17. The elevator according to claim 14, wherein the connecting part is a rope.

18. The elevator according to claim 14, wherein the frame is an L-profile with two flanks, both carrying rollers and the bias device such that the rollers of both flanks are in contact with two differently oriented surfaces of the guide rail.

19. The elevator according to claim 14, wherein the connecting part is a rope with a length of at least two meters.

Description

(1) The invention is now described by a preferred embodiment with the aid of the schematic drawings. In these drawings:

(2) FIG. 1 shows a schematical drawing of the alignment tool, a guide rail and a part of the elevator car,

(3) FIG. 2 shows an enlarged side view of the alignment tool of FIG. 1, and

(4) FIG. 3 shows a top view of the alignment tool of FIG. 1.

(5) FIG. 1 shows an elevator construction 10 comprising a guide rail 12 and an elevator car 14 which consists of an elevator cabin 16 mounted in a frame or car sling 18 which extends completely around the elevator cabin and is used to mount the car in the shaft and to carry car components as guide rollers and safety gears 20. Instead of the car also an IT platform can be used. An alignment tool 22 is connected to the car sling 18 via a connecting rope 24 as connecting part. The connecting rope 24 is fixed to the upper end of a frame 26 of the alignment tool 22 which is embodied as L-profile (see FIGS. 2 and 3).

(6) The frame comprises bearing mountings 28 carrying rollers 30 which are running on the surface of the guide rail and keep the frame 26 in close distance to the guide rail surface. The frame further carries magnets 32 on the side facing the guide rail 12 (see FIGS. 2 and 3). The magnets are kept by the rollers in a short distance to the guide rail surface so that the magnetic force between the guide rail and the frame keeps the frame fixedly biased to the guide rail surface. The frame further comprises a horizontal mounting plate 34 on which a laser 36 is adjusted and mounted so that the emitted laser beam 38 extends along the longitudinal axis of the frame and accordingly along the guide rail 12.

(7) The horizontal mounting plate 34 is mounted with a flange 40 and bolts to the frame 26 (can only be seen in FIG. 2).

(8) As it can be seen from FIGS. 2 and 3 the frame 26 is an L-profile consisting of two flanks 42, 44 which are oriented perpendicular to each other. Each flank has a first side 50 facing the guide rail surface and a second side 48 opposite to the guide rail surface 46, 47. Each of the flanks carry bearing mountings 28 on the second side 48 carrying rollers 30 and magnets 32 on the first side 50 with a thickness d2. The magnets 32 are kept in a short distance with respect to the guide rail surface 46, which corresponds to the distance dl of the rollers 30 extending through the first side 50 of the frame in the direction of the guide rail surface 46, 47 minus the thickness d2 of the magnets.

(9) This distance dl minus d2 of the magnets 32 from the surface 46, 47 of the guide rail 12 is adjusted such that the magnetic force between the frame 26 and the surfaces 46, 47 of the guide rail is high but that on the other hand the magnets 32 do not touch the guide rail surfaces 46, 47. In the embodiment of FIGS. 2 and 3 the flank 44 covers one guide rail surface 46 and the other flank 42 perpendicular to the other covers a perpendicular guide rail surface 47 so that the frame 26 is kept in a defined position in the horizontal plane.

(10) It shall be clarified that the drawing is only schematical. Accordingly, the relative dimensions of the components may deviate essentially from that shown in the figure.

(11) It shall be clear that the invention can be modified from the described embodiment within the scope of the appended claims.