ELEVATOR SYSTEM ARRANGEMENT HAVING AN ELEVATOR BRAKE DEVICE

Abstract

An elevator system arrangement includes a car, a brake strip and an elevator brake device for braking the car on the brake strip, preferably on a brake strip integrated in a guide rail. The elevator brake device includes: a brake housing displaceably mounted in the elevator brake device and is held in a standby position by an applied force, a brake body movably arranged on the brake housing and designed to clamp the brake strip, a pusher arranged on the brake housing so that the brake strip can be arranged between the brake body and the pusher, wherein, when the elevator brake device installed, the distance from the car-side delimitation plane of the elevator brake device to the end face of the brake strip is less than 70% of the distance from the car-side delimitation plane of the elevator brake device to the car-remote plane.

Claims

1-12. (canceled)

13. An elevator system arrangement including a car, a brake strip and an elevator brake device for braking the car on the brake strip, the elevator brake device comprising: a brake housing horizontally displaceably mounted in the elevator brake device and in a standby position by an applied force; a brake body movably arranged on the brake housing and is displaceable or rotatable upon contact with the brake strip to clamp the brake strip; a pusher arranged on the brake housing such that the brake strip can be arranged between the brake body and the pusher; wherein, in the standby position of the brake housing, a distance between the brake body and the pusher corresponds at least to a thickness of the brake strip plus a first clearance between the brake body and the brake strip and a second clearance between the pusher and the brake strip; wherein the pusher is adapted to be advanced in a direction of the brake body along a line of action extending perpendicularly to the brake strip to press the pusher against the brake strip when the brake strip is arranged between the brake body and the pusher; wherein the line of action and a direction of travel of the car lie in a reference plane; a car-remote plane is oriented in parallel with the reference plane such the elevator brake device is entirely located on a car side of the car-remote plane and the car-remote plane touches the elevator brake device, and a car-side plane is oriented in parallel with the reference plane and such that the elevator brake device is entirely located on a car-remote side of the car-side plane and the car-side plane touches the elevator brake device; and when the elevator brake device is installed on the car, a distance from the car-side plane to the brake strip less than 70% of a distance from the car-side plane to the car-remote plane.

14. The elevator system arrangement according to claim 13 wherein when the elevator brake device is installed on the car, the distance from the car-side plane to the brake strip less than 30% of a distance from the car-side plane to the car-remote plane.

15. The elevator system arrangement according to claim 13 including a pressure lever pivotally mounted on the brake housing and acting on the pusher during a braking process to press the pusher against the brake strip thereby laterally displacing the brake housing and bringing the brake body into contact with the brake strip.

16. The elevator system arrangement according to claim 15 wherein the pressure lever includes a pivot pin aligned horizontally relative to a vertical direction of travel of the car.

17. The elevator system arrangement according to claim 16 wherein the pivot pin is oriented perpendicularly to the line of action.

18. The elevator system arrangement according to claim 15 wherein the pressure lever is located completely on the car-remote side of a plane that is oriented in parallel with the reference plane such that the brake strip is located entirely on the car-remote side of the plane and the plane touches the brake strip.

19. The elevator system arrangement according to claim 15 including a releasable holding device holding the pressure lever in the standby position.

20. The elevator arrangement according to claim 19 wherein the holding device holds the pressure lever with a force generated electromagnetically.

21. The elevator system arrangement according to claim 19 wherein the holding device is movably mounted on the brake housing and the pusher touches the holding device after a catch of the brake strip has taken place.

22. The elevator system arrangement according to claim 13 wherein the elevator brake device is located at least partially above a floor plane of the car.

23. The elevator system arrangement according to claim 13 wherein the elevator brake device protrudes less than 50 mm below a floor plane of the car.

24. The elevator system arrangement according to claim 13 including at least one spring connected to advance the pusher in the direction of the brake body.

25. The elevator system arrangement according to claim 13 wherein the pusher has a roller for rolling on the brake strip.

26. The elevator system arrangement according to claim 13 including positioning springs adapted to ensure that the first and second clearances are maintained in a non-triggered state of the elevator brake device.

Description

DESCRIPTION OF THE DRAWINGS

[0050] Further advantages, features and details of the invention can be found in the following description of embodiments and with reference to the drawings, in which like or functionally like elements are provided with identical reference signs. The drawings are merely schematic and not to scale.

[0051] In the drawings:

[0052] FIG. 1 is a schematic view of the elevator system arrangement from the side.

[0053] FIG. 2 is an isometric view of the elevator brake device.

[0054] FIG. 3 is a horizontal projection of the elevator brake device including the brake strip and part of the car.

[0055] FIG. 4 is a vertical projection of the elevator brake device including the brake strip and part of the car.

DETAILED DESCRIPTION

[0056] FIG. 1 shows an elevator system arrangement 1 which comprises two elevator brake devices 5. A car 3 is mounted so as to be movable along two guide rails which, in this example, also comprise the brake strips 2. The car 3 is guided on the guide rails via guide shoes 4. In this elevator system arrangement 1, the elevator brake devices 5 are arranged completely above the floor plane 18 in the car 3. The floor plane 18 refers to the area on which a passenger or the payload stands in the car 3. The floor structure 25, which absorbs the forces of the passengers or the payload, is located below the floor plane 18.

[0057] FIGS. 2, 3 and 4 show the same embodiment of the invention. FIG. 2 shows an isometric view of the elevator brake device 5. For better visibility of the components, the brake strip 2 is not shown in this view. FIG. 3 is a horizontal view of the same elevator brake device 5, in which the brake strip 2 is also shown schematically. FIG. 4 is a vertical view of the same elevator brake device 5, in which the brake strip 2 is also shown.

[0058] FIGS. 2, 3 and 4 show the elevator brake device 5 in the standby position. This is the normal operating position of the elevator brake device 5 and allows normal operation of the elevator system 1. The elevator brake device 5 is fastened to a side plate 23 of the car 3 via fastening rails 24 which are part of the elevator brake device 5. A brake housing 6 is laterally displaceably mounted in the fastening rails 24. A pressure lever 11, a brake pad 16 and a brake body 7 are all fastened to the brake housing 6 in this embodiment. The pressure lever 11 is in contact with a holding device 14 and is held thereby in the standby position. The pressure lever 11 has a pusher 8, which in this example consists of rollers.

[0059] In the embodiment shown, the holding device 14 includes an electromagnet 26 which is designed to hold the pressure lever 11 on a contact surface. The pressure lever 11 is acted upon by four tensioned springs 13. The holding device 14 is able to hold these spring forces. Because the pressure lever 11 is held by the holding device 14, the pusher 8 can be kept at a distance from the brake strip 2 by at least one clearance 9a. Because the brake housing 6 is centered by the positioning springs 15, the brake pad 16, which in this embodiment is supported by two sets of disk springs 27, is also kept at a distance from the brake strip 2 by at least one clearance 9a. The brake body 7 is located on the other side of the brake strip 2.

[0060] Because the brake housing 6 is centered by the positioning springs 15, the brake body 7 is kept at a distance from the brake strip 2 by a clearance 9b. In order for the brake housing 6 to be held in a horizontal target position, the brake housing 6 is resiliently held in a central position by the positioning springs 15. As a result, the clearance 9a, 9b is maintained. The positioning springs 15 and the clearance can be clearly seen in FIG. 4.

[0061] A pivot pin 12 of the pressure lever 11 is aligned perpendicularly to the line of action 10 and horizontally in FIG. 2. This has the advantage that the advancing process of the pusher 8 takes place in a plane parallel to the car wall. As a result, the pusher 8 does not change its position and alignment relative to the end face of the brake strip during the advancing. This has the advantage that the pusher 8 always presses on the brake strip 2 in a desired region. It is thus ensured that the pusher always presses reliably on and not next to the brake strip if the pusher 8 presses against the brake strip 2.

[0062] In particular, if the pusher 8 is designed as a roller, the roller is loaded only by radial forces in this type of construction. If the pivot pin 12 were aligned vertically, for example, as in EP 2 788 271, the rollers would be pressed onto the brake strip 2 at different angles and the point of contact with the brake strip 2 would also change its distance from the end face of the brake strip 2.

[0063] In order to avoid the advancing of the pusher 8 being disturbed by possible frictional forces between the pusher 8 and the brake strip 2, it is advantageous to keep these frictional forces as small as possible. For this purpose, the pusher 8 in FIG. 2 is designed as a pair of rollers. However, the pusher 8 could also be designed simply as a smoothly sliding contact surface with respect to the brake strip 2.

[0064] In addition to the general description, FIG. 3 also shows a guide shoe 4, a side plate 23 of the car and, purely schematically, part of the floor structure 25 of the car 3. The elevator brake device 5 is located at least partially above a floor plane 18. In FIG. 3, even the essential part of the elevator brake device 5 is located above the floor plane 18. Only the two fastening rails 24 protrude slightly below the floor plane 18. However, said rails protrude less than 50 mm below the floor plane 18 and remain in the region of the vertical extension of the floor structure 25.

[0065] The car 3 is moved along the guide rails. The guide rails, which in this example contain the brake strip 2, extend through the guide shoe 4 and between the brake pad 16 and the brake body 7. The direction of travel 19 is indicated as being upward, but of course also includes a downward direction of travel.

[0066] The force that the pusher 8 exerts on the brake strip when required acts substantially along the line of action 10. Since the pusher 8 is designed as a pair of rollers, no significant frictional force components can arise. If the pusher 8 were designed only as a sliding layer, the force would also contain frictional force components.

[0067] The side plate 23 covers part of the positioning springs 15 in FIG. 3. The positioning springs 15 can be clearly seen in FIG. 4.

[0068] In FIG. 4, the characterizing feature of the invention is shown by way of example. The car-remote plane 20 is the plane which is aligned in parallel with a plane which is spanned by the line of action 10 and a direction of travel 19, and is displaced so far away from the car wall 22 that the elevator brake device 5 is just touched. The car-wall-side plane 21 is the plane which is aligned in parallel with a plane which is spanned by the line of action 10 and a direction of travel 19, and is displaced so far toward the car wall 22 that the elevator brake device 5 is just touched. The elevator brake device 5 is therefore located completely between the car-wall-side plane 21 and the car-remote plane 20.

[0069] The elevator brake device 5 can be triggered electronically. Typically, a power supply unit supplies power to the electromagnet 26 and the elevator brake device 5 can thus be held in the standby position. The elevator system arrangement has a centralized or decentralized control unit. This control unit monitors the elevator system arrangement and triggers the elevator brake device where necessary by the current through the electromagnet 26 being switched off via the power supply unit.

[0070] One advantage of electronic triggering is that expensive mechanical speed limiters that take up a lot of space can be dispensed with. As soon as it is determined in the elevator system, for example in a control device, that the elevator brake device 5 is to be triggered, this information is transmitted electronically to the holding device 14.

[0071] As soon as the power supply to the electromagnet 26 is interrupted by the control unit, the pressure lever 11, which is loaded by springs 13 under tension, is released from the holding device 14. The pressure lever 11 rotates about the pivot pin 12 of the pressure lever 11 so that the pusher 8 initially eliminates the clearance 9a with respect to the brake strip 2. The pusher 8 then pushes the entire brake housing 6 to the side—to the left in FIG. 4—via the pivot pin 12. This now also reduces the clearance 9b. When the brake body 7 touches the brake strip 2, this part of the brake body 7 is carried along. As a result, the brake body 7 performs a rolling-in movement and it presses increasingly harder against the brake strip 2. As a result of the rolling-in movement, the brake housing 6 is now displaced to the other side, i.e. to the right in FIG. 4. As a result, the brake lever 11 is turned back again via the pusher 8, the springs 13 are tensioned again, and the contact surface is brought back into contact with the holding device 14. The brake housing is displaced even further until the brake pad 16 is then pressed against the brake strip 2 with great clamping force, thereby generating the actual braking force. The brake strip 2 is now clamped between the brake pad 16 and the brake body 7 and the resulting frictional forces cause a braking force. The holding device 14 is resiliently mounted and allows the pressure lever 11 to be rotated further beyond the standby position.

[0072] The total clearance, which results from the sum of the clearances 9a and 9b, is predetermined by the design of the elevator brake device 5. The distribution of the total clearance 9a, 9b over the two clearances 9a and 9b can be set by adjusting the lock nuts on the positioning springs 15 and readjusted if necessary.

[0073] The alignment of the pivot pin 12 means that the distance between the pusher 8 and the end face 17 of the brake strip 2 remains substantially constant. This ensures that the braking process is carried out safely, since the pusher 8 cannot press next to the brake strip 2, nor can the rolling direction of the rollers of the pusher 8 deviate from the direction of travel 19.

[0074] The elevator brake device 5 is fastened to the side plate 23 via the two fastening rails 24.

[0075] In FIG. 4, the positioning springs 15 are supported on the side plate 23 of the car. Of course, it would also be possible for this support to act against a component of the elevator brake device 5 or against another part of the car 3.

[0076] Finally, it should be noted that terms such as “comprising,” “having,” etc. do not preclude other elements or steps and terms such as “a” or “an” do not preclude a plurality. It should also be noted that features or steps that have been described with reference to one of the above embodiments may also be used in combination with other features or steps of other embodiments described above.

[0077] 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.