Passenger conveyor

Patent metadata

Field	Value
Publication number	US-11034552-B2
Application number	US-202016804239-A
Country	US
Kind code	B2
Filing date	Feb 28, 2020
Priority date	Aug 30, 2017
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

The invention relates to a passenger conveyor, such as an escalator or autowalk, comprising a band of conveying elements; a diverting wheel for diverting the passage of the band of conveying elements and/or a traction member thereof and a brake for braking rotation of the diverting wheel. The brake comprises a screw member having a conical threaded external rim; a nut member having a conical threaded internal rim, the screw member and nut member being screwed together, one of said screw member and nut member being connected with the diverting wheel for being driven by the diverting wheel. The brake further comprises a stopping device for stopping rotation of the other of said screw member and nut member.

First claim

The invention claimed is:

1. A passenger conveyor, comprising
a band of conveying elements, the band of conveying elements including a plurality of conveying elements;
a diverting wheel configured to divert a passage of the band of conveying elements and/or a traction member thereof; and
a brake configured to brake rotation of the diverting wheel,
wherein the brake includes
a screw member having a conical threaded external rim,
a nut member having a conical threaded internal rim, the screw member and nut member being screwed together, wherein one of said screw member and nut member is connected with the diverting wheel such that said one of said screw member and nut member is configured to be driven by the diverting wheel, and
a stopping device configured to stop rotation of an other of said screw member and nut member.

2. The passenger conveyor according to claim 1 , wherein the screw member and nut member are rotatable together by the diverting wheel.

3. The passenger conveyor according to claim 1 , wherein said one of said screw member and nut member is said screw member and said other of said screw member and nut member is said nut member.

4. The passenger conveyor according to claim 1 , wherein the screw member and nut member have been pre-tightened together by screwing of the screw member into the nut member.

5. The passenger conveyor according to claim 1 , wherein the screw member and nut member are tightenable together to engage more firmly with each other, by screwing of the screw member deeper into the nut member.

6. The passenger conveyor according to claim 1 , wherein the diverting wheel is configured to rotate in a first rotation direction to cause screwing of the screw member deeper into the nut member, in response to the stopping device having stopped rotation of said other of said screw member and nut member.

7. The passenger conveyor according to claim 1 , wherein the band of conveying elements includes an inclined conveying section configured to convey passengers standing on the plurality of conveying elements at an inclined angle upwards or downwards, the inclined conveying section including one or more conveying elements of the plurality of conveying elements, the one or more conveying elements configured to be stood upon by the passengers.

8. The passenger conveyor according to claim 7 , wherein
the diverting wheel is configured to rotate in a first rotation direction to cause screwing of the screw member deeper into the nut member, in response to the stopping device having stopped rotation of said other of said screw member and nut member, and
said first rotation direction is a rotation direction in which the diverting wheel rotates based on the one or more conveying elements of the inclined conveying section moving at an inclined angle downwards.

9. The passenger conveyor according to claim 1 , wherein said one of said screw member and nut member is connected with the diverting wheel by a connection that is configured to transmit rotation between the screw member and the nut member in two opposite rotation directions.

10. The passenger conveyor according to claim 1 , wherein said one of said screw member and nut member is fixed on the diverting wheel or a shaft on which the diverting wheel is mounted.

11. The passenger conveyor according to claim 1 , wherein
the nut member is surrounded by an empty space outside the nut member in a radial direction, such that the nut member is free to radially expand when tightened together with the screw member, and/or
the screw member has an empty inside space, such that the screw member is free to radially expand when tightened together with the nut member.

12. The passenger conveyor according to claim 1 , further comprising a control arrangement configured to control operation of the stopping device.

13. The passenger conveyor according to claim 1 , wherein the stopping device includes at least one stopping member that is movable to act on the other of said screw member and nut member to stop rotation thereof, to thereby cause relative rotation between the screw member and nut member.

14. The passenger conveyor according to claim 13 , further comprising a control arrangement configured to control operation of the stopping device, wherein the control arrangement is configured to control movement of the at least one stopping member.

15. The passenger conveyor according to claim 13 , wherein said other of said screw member and nut member includes a cogged rim, and said at least one stopping member is movable into a rotational path of at least one cog of a plurality of cogs of the cogged rim.

16. The passenger conveyor according to claim 12 , wherein the control arrangement includes an electrical controller configured to control the stopping device over an electrical bus.

17. The passenger conveyor according to claim 16 , wherein the electrical controller is configured to activate the stopping device to stop rotation of the other of said screw member and nut member, based on overspeed being detected in one or more moving parts of the passenger conveyor.

18. The passenger conveyor according to claim 1 , wherein the stopping device includes an electrically controlled actuator.

19. The passenger conveyor according to claim 18 , wherein the electrically controlled actuator is configured to actuate the stopping device to act on the other of said screw member and nut member to stop rotation thereof.

20. A brake configured to brake rotation of a diverting wheel of a passenger conveyer, the brake comprising:
a screw member having a conical threaded external rim;
a nut member having a conical threaded internal rim, the screw member and nut member being screwed together, wherein one of said screw member and nut member is configured to be connected with the diverting wheel such that said one of said screw member and nut member is configured to be driven by the diverting wheel; and
a stopping device configured to stop rotation of an other of said screw member and nut member.

21. The brake of claim 20 , wherein the screw member and nut member are rotatable together by the diverting wheel.

22. The brake of claim 20 , wherein the screw member and nut member are tightenable together to engage more firmly with each other, by screwing of the screw member deeper into the nut member.

23. The brake of claim 20 , wherein the screw member is configured to screw deeper into the nut member based on the diverting wheel rotating in a first rotation direction, in response to the stopping device having stopped rotation of said other of said screw member and nut member.

24. The brake of claim 20 , wherein said one of said screw member and nut member is configured to be connected with the diverting wheel by a connection that is configured to transmit rotation between the screw member and the nut member in two opposite rotation directions.

Assignees

• Kone Corp

Inventors

• Viita-Aho Tarvo
• Mustalahti Jorma
• Pelto-Huikko Raimo
• Laine Janne

Classifications

• F16D63/006

  Positive locking brakes · CPC title

• B66B21/10

  Moving walkways · CPC title

• F16D2125/28

  Cams; Levers with cams · CPC title

• B66B23/024

  Chains therefor · CPC title

• F16D2121/20

  using electromagnets · CPC title