MONITORING DEVICE FOR SAFEGUARDING A DRIVEN ELEMENT

• US 20120000728A1
• Filed: 06/30/2011
• Published: 01/05/2012
• Est. Priority Date: 07/05/2010
• Status: Active Grant

• Current Assignee: Cedes AG (Assa Abloy AB)
• Original Assignee: Cedes AG (Assa Abloy AB)
• Inventors: De Coi, Beat, Leutenegger, Tobias
• Granted Patent: US 8,833,524 B2
• Time in Patent Office: Days
• US Class Current: 187/279
• CPC Class Codes: B66B 13/26 between closing doors

Abstract

A monitoring device for safeguarding a driven element against undesired collisions with an object lying on the movement path of the driven element is proposed, said monitoring device comprising at least one transmitting element and a receiving element. According to the invention, the device is designed such that the at least one transmitting element, is arranged in a horizontal boundary region of an opening to be monitored, which opening can be at least partially closed by the driven element. Moreover, a multiplicity of receiving elements are arranged in a horizontal, opposite boundary region in distributed fashion along the opening to be monitored, wherein the at least one transmitting element, together with each of the multiplicity of receiving elements forms a light barrier arrangement, which can be evaluated in each case by evaluation means.

Claims

1. A monitoring device for safeguarding a driven element against undesired collisions with an object lying on the movement path of the driven element, said monitoring device comprising at least one transmitting element and a receiving element, wherein the device is designed such that the at least one transmitting element is arranged in a horizontal boundary region of an opening to be monitored, which opening can be at least partially closed by the driven element, and in that a multiplicity of receiving element are arranged in a horizontal, opposite boundary region in distributed fashion along the opening to be monitored, wherein the at least one transmitting element, together with each of the multiplicity of receiving elements forms a light barrier arrangement, which can be evaluated in each case by evaluation means.

2. A device according to claim 1, wherein the device is designed in such a way that the multiplicity of receiving elements, for distributed arrangement along the opening to be monitored, are distributed over an at least approximately complete horizontally extending opening region.

3. A device according to claim 1, wherein the device is configured such that, in the horizontal boundary region of an opening, a transmitting element, is arranged in each case in a region of a left and right lateral boundary of the opening.

4. A device according to claim 1, wherein the device is designed in such a way that a transmitting element is positioned approximately centrally in a horizontal boundary region of an opening.

5. A device according to claim 1, wherein a sequential or parallel evaluation of the receiving elements is made possible.

6. A device according to claim 1, wherein the device is designed for arrangement of more than three transmitting elements in a horizontal boundary region of an opening.

7. A device according to claim 1, wherein the device is designed for mounting the receiving elements on an apron of a car of an elevator.

8. A device according to claim 1, wherein the receiving elements is designed for mounting on a car of an elevator by means of clips and/or screws.

9. A device according to claim 1, wherein the device is designed for mounting the receiving elements in the door threshold of a car of an elevator.

10. A device according to claim 1, wherein receiving elements and/or transmitting elements are arranged in a strip.

11. A device according to claim 1, wherein the device is designed for mounting a transmitting element on a car in a fixed manner and/or in a manner concomitantly moving on the driven element.

12. A device according to claim 1, wherein the transmitting and/or receiving elements are designed in such a way that, in an incorporated state, they have a significantly larger optical aperture angle along an opening width (b) of an opening to be monitored than in a direction transversely with respect thereto.

13. A device according to claim 1, wherein the receiving elements have a mounting thickness of <

5 mm.

14. A device according to claim 1, wherein the at least one transmitting element is arranged in a horizontal upper boundary region and the receiving elements are arranged in a horizontal lower boundary region of the opening to be monitored.

15. A device according to claim 1, wherein the at least one transmitting element is arranged in a horizontal lower boundary region and the receiving elements are arranged in a horizontal upper boundary region of the opening to be monitored.

16. A device according to claim 1, wherein an upper side of the receiving elements is oblique or rounded.

17. A device according to claim 1, wherein a strip with receiving elements is designed in flexibly pliable fashion.

18. A device according to claim 1, wherein the evaluation means are designed in such a way that only those receiving elements which are situated in the opened region of an opening to be monitored are active.

19. A device according to claim 1, wherein the receiving elements and/or the at least one transmitting element are designed with optical waveguide means.

20. A device according to claim 1, wherein coding means, and a sensor for detecting the coding means are provided in order to be able to carry out position detection for an elevator.

21. An elevator comprising a device according to claim 1.