Elevator safety gear trigger and reset system

Patent metadata

Field	Value
Publication number	US-11459208-B2
Application number	US-201916693790-A
Country	US
Kind code	B2
Filing date	Nov 25, 2019
Priority date	Dec 20, 2018
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

The system comprises a synchronization shaft rotatably supported on an elevator car frame, the synchronization shaft being operatively connected to at least one safety gear, a lever attached to the synchronization shaft, an electromagnet operatively connected to the lever, spring means operatively connected to the synchronization shaft, and resetting means operatively connected to the synchronization shaft. Deactivation of the electromagnet releases the lever allowing the spring means to rotate the synchronization shaft from a first position to a second position in which the safety gear is activated. Activation of the resetting means rotates the synchronization shaft from the second position to the first position in which the safety gear is deactivated and the spring means is brought back to the excited state at the same time.

First claim

The invention claimed is:

1. An elevator safety gear trigger and reset system comprising
a synchronization shaft rotatably supported on an elevator car frame, the synchronization shaft being operatively connected to at least one safety gear,
a lever attached to the synchronization shaft,
an electromagnet operatively connected to the lever,
a spring operatively connected to the synchronization shaft,
an actuator operatively connected to the synchronization shaft, whereby
activation of the safety gear is achieved by deactivating the electromagnet so that the lever is released from the operative connection with the electromagnet allowing the spring to rotate the synchronization shaft around its longitudinal axis from a first position in which the safety gear is deactivated to a second position in which the safety gear is activated, and
deactivation of the safety gear and resetting of the safety gear trigger is achieved by activating the actuator to rotate the synchronization shaft around its longitudinal axis from the second position in which the safety gear is activated to the first position in which the safety gear is deactivated, the spring being brought back to an excited state at the same time.

2. The elevator safety gear trigger and reset system according to claim 1 , wherein the actuator is operatively connected to the synchronization shaft.

3. The elevator safety gear trigger and reset system according to claim 2 , wherein the actuator is configured to produces a linear or a rotational movement which is converted into a rotational movement of the synchronization shaft in order to rotate the synchronization shaft back to the first position.

4. The elevator safety gear trigger and reset system according to claim 1 , wherein the spring is configured to acts on the synchronization shaft in a first action point and the actuator is configured to acts on the synchronization shaft in a second action point, the first action point being at an axial distance from the second action point.

5. The elevator safety gear trigger and reset system according to claim 1 , wherein the spring is operatively connected between the car frame and the lever.

6. The elevator safety gear trigger and reset system according to claim 1 , wherein the electromagnet comprises an armature being supported on the lever.

7. An elevator comprising an elevator car surrounded by a car frame moving upwards and downwards on guide rails in an elevator shaft, at least one safety gear supported on the car frame and acting on the guide rail, wherein an elevator safety gear trigger and reset system according to claim 1 is arranged in connection with the car frame.

8. An elevator safety gear trigger and reset system comprising
a synchronization shaft rotatably supported on an elevator car frame, the synchronization shaft being operatively connected to at least one safety gear,
a lever attached to the synchronization shaft,
an electromagnet operatively connected to the lever,
a spring operatively connected to the synchronization shaft,
an actuator operatively connected to the synchronization shaft, whereby
activation of the safety gear is achieved by deactivating the electromagnet so that the lever is released from the operative connection with the electromagnet allowing the spring to rotate the synchronization shaft from a first position in which the safety gear is deactivated to a second position in which the safety gear is activated, and
deactivation of the safety gear and resetting of the safety gear trigger is achieved by activating the actuator to rotate the synchronization shaft from the second position in which the safety gear is activated to the first position in which the safety gear is deactivated, the spring being brought back to the excited state at the same time,
wherein the system further comprises a first synchronisation shaft rotatably supported on the car frame and operatively connected to a first safety gear and a second synchronization shaft rotatably supported on the car frame and operatively connected to a second safety gear, the first synchronization shaft and the second synchronization shaft being operatively connected to each other so that the first synchronization shaft and the second synchronization shaft rotate in synchronism.

9. The elevator safety gear trigger and reset system according to claim 8 , wherein the lever is attached to the first synchronisation shaft or to the second synchronization shaft.

10. The elevator safety gear trigger and reset system according to claim 8 , wherein the operative connection between the first synchronization shaft and the second synchronization shaft is realized with a first pull bar extending between the first synchronization shaft and the second synchronization shaft.

11. The elevator safety gear trigger and reset system according to claim 10 , wherein the spring is operatively connected between the car frame and the first pull bar.

12. The elevator safety gear trigger and reset system according to claim 8 , wherein the system further comprises a third synchronisation shaft rotatably supported on the car frame, the third synchronization shaft being operatively connected to the first synchronization shaft or to the second synchronization shaft so that the operatively connected synchronizations shafts rotate in synchronism.

13. The elevator safety gear trigger and reset system according to claim 12 , wherein the operative connection between the operatively connected synchronization shafts is realized with a second pull bar extending between the operatively connected synchronization shafts.

14. The elevator safety gear trigger and reset system according to claim 12 , wherein the lever is attached to the third synchronisation shaft.

15. The elevator safety gear trigger and reset system according to claim 12 , wherein the spring is operatively connected between the car frame and the third synchronization shaft.

Assignees

• Kone Corp

Inventors

• Hallikainen Pekka
• Maki Antti I
• Koskinen Antti
• Hartikainen Petri

Classifications

• B66B7/044

  with magnetic or electromagnetic means · CPC title

• B66B5/18

  and applying frictional retarding forces · CPC title

• B66B5/0087 Primary

  Devices facilitating maintenance, repair or inspection tasks (devices incorporated in the buffer B66B5/288; railings on top of the car B66B11/0226) · CPC title

• B66B5/16

  Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well · CPC title

• B66B5/26 Primary

  Positively-acting devices, e.g. latches, knives · CPC title