Elevator and means for forming a safety space

• US 9,878,877 B2
• Filed: 06/26/2015
• Issued: 01/30/2018
• Est. Priority Date: 01/07/2013
• Status: Active Grant

• Current Assignee: Kone Corporation
• Original Assignee: Kone Corporation
• Inventors: Pursiainen, Jari, Mntynen, Samuli, Rsnen, Matti, Kahila, Jaakko, Vajavaara, Keijo, Alvesalo, Mika, Haapaniemi, Markku, Viinikkala, Kristian
• Primary Examiner(s): Riegelman, Michael A
• Application Number:
  US14/752,559
• Publication Number:
  US 20150321882A1
• Time in Patent Office: 949 Days
• Field of Search: 187360
• CPC Class Codes: B66B 13/02 Door or gate operation of general application E05F
• CPC Class Codes: B66B 5/005 Safety of maintenance personnel
• CPC Class Codes: B66B 5/0056 by preventing crushing
• CPC Class Codes: B66B 5/0068 by activating the safety brakes when the elevator car exceeds a certain upper or lower position in the elevator shaft
• CPC Class Codes: B66B 5/0075 by anchoring the elevator car or counterweight

Abstract

An elevator includes at least an elevator car arranged to move reciprocally in an elevator hoistway and fitted on guide rails, a plurality of landing doors having landing door locks openable e.g. with a service key, and a safety arrangement arranged to form a safe space, preferably a working space, in the elevator hoistway below the elevator car, access to which safe space is enabled via at least one landing door in the proximity of the base of the elevator hoistway, and/or a safe space, preferably a working space, above the elevator car, to which access is enabled via at least one landing door leading to the roof of the elevator car, and in which elevator the aforementioned safe space has a minimum height. The formation of each safe space is arranged to be implemented as a consequence of the opening occurring, e.g. with a service key, from a floor level of a landing door enabling access into the elevator hoistway.

Claims

1. An elevator, comprising:

an elevator car arranged to move reciprocally in an elevator hoistway, said elevator car being fitted on guide rails;

a plurality of landing doors, each having a landing door lock openable with a service key; and

a safety arrangement, said safety arrangement being arranged to form a safe space in the elevator hoistway below the elevator car and/or above the elevator car, to which access is enabled via at least one of the plurality of landing doors, and in which elevator the safe space has a minimum height,

wherein the safety arrangement comprises a mechanical transmission member and a safety device,

wherein the mechanical transmission member extends from the door lock of the at least one landing door to the safety device,

wherein the safety device is mechanically actuated via the mechanical transmission member,

wherein the safety device is a spring-loaded tripping device rigidly fixed in the elevator hoistway and comprises;

a mounting base;

a locking detent mounted on the mounting base and configured to be moved along a single axis via a detent spring pressing against the locking detent;

a pin connected to the mounting base via a first hinge and connected to a transmission rod via a second hinge; and

a stopper comprising a stopper spring;

wherein the transmission rod is connected to the stopper via a third hinge,

wherein the mechanical transmission member is connected to the safety device at the locking detent at one end thereof, and

wherein the stopper rests against a surface of the locking detent in a refracted position when the door lock is closed, wherein the stopper spring is configured to bias the stopper against the locking detent.

2. The elevator according to claim 1, wherein the mechanical transmission member is connected to the safety device in the bottom part of the elevator hoistway for forming a safe space below the elevator car by preventing undesired downward movement of the elevator car.

3. The elevator according to claim 1, wherein the mechanical transmission member is connected to the safety device in the top end of the elevator hoistway for forming a safe space above the elevator car by preventing undesirable upward movement of the elevator car.

4. The elevator according to claim 1, wherein the mechanical transmission member is a steel rope connected directly from the door lock to the safety device.

5. The elevator according to claim 1, wherein opening of the door lock pulls the locking detent away from the stopper, allowing the stopper to extend, thereby moving the pin, via the transmission rod, into a counterpart of the elevator car to lock the elevator car in a fixed position.

6. The elevator according to claim 1 wherein the safety device further comprises a return device configured to return the stopper to the retracted position.

7. The elevator according to claim 1, wherein the safety device comprises a switch that monitors the position of the safety member and informs a control system when the safety member is in a safe, locked position and when the safety member is in an inner position that permits normal drive with the elevator.

8. The elevator according to claim 1, wherein the elevator car comprises a counterpart with detent member(s), and

wherein the counterpart is configured to receive a pin of the safety device for locking the elevator car into a fixed position.

9. An elevator, comprising:

an elevator car arranged to move reciprocally in an elevator hoistway, said elevator car being fitted on guide rails;

a plurality of landing doors, each having a landing door lock openable with a service key; and

a safety arrangement, said safety arrangement being arranged to form a safe space in the elevator hoistway below the elevator car, access to the safe space being enabled via at least one of the plurality of landing doors, the safe space having a minimum height,

wherein the safety arrangement further comprises a mechanical transmission member extending from the door lock of the at least one landing door to a safety device of the safety arrangement

wherein the safety device is mechanically actuated via the mechanical transmission member,

wherein the safety device is a spring-loaded tripping device rigidly fixed in the elevator hoistway and comprises;

a mounting base;

a locking detent mounted on the mounting base and configured to be moved along a single axis via a detent spring pressing against the locking detent;

a pin connected to the mounting base via a first hinge and connected to a transmission rod via a second hinge; and

a stopper comprising a stopper spring;

wherein the transmission rod is connected to the stopper via a third hinge,

wherein the mechanical transmission member is connected to the safety device at the locking detent at one end thereof, and

wherein the stopper rests against a surface of the locking detent in a retracted position when the door lock is closed, wherein the stopper spring is configured to bias the stopper against the locking detent.

10. The elevator according to claim 9, wherein the formation of the safe space is arranged to be implemented as a consequence of the opening of the door lock of a floor level landing door, which enables access into the elevator hoistway.

11. The elevator according to claim 9, wherein opening of the lock activates the safety device via movement of the mechanical transmission member, thereby locking the elevator car into a fixed position.

12. The elevator according to claim 9, wherein the elevator car comprises a counterpart with detent member(s), and

wherein the counterpart is configured to receive a pin of the safety device for locking the elevator car into a fixed position.

13. An elevator, comprising:

an elevator car arranged to move reciprocally in an elevator hoistway, said elevator car being fitted on guide rails;

a plurality of landing doors, each having a landing door lock openable with a service key; and

a safety arrangement, said safety arrangement being arranged to form a safe space in the elevator hoistway above the elevator car, to which access is enabled via at least one of the plurality of landing doors leading to the roof of the elevator car, the safe space having a minimum height,

wherein the safety arrangement further comprises a mechanical transmission member extending from the door lock of the at least one landing door to a safety device of the safety arrangement,

wherein the safety device is mechanically actuated via the mechanical transmission member,

wherein the safety device is a spring-loaded tripping device rigidly fixed in the elevator hoistway and comprises;

a mounting base;

a locking detent mounted on the mounting base and configured to be moved along a single axis via a detent spring pressing against the locking detent;

a pin connected to the mounting base via a first hinge and connected to a transmission rod via a second hinge; and

a stopper comprising a stopper spring;

wherein the transmission rod is connected to the stopper via a third hinge,

wherein the mechanical transmission member is connected to the safety device at the locking detent at one end thereof, and

wherein the stopper rests against a surface of the locking detent in a retracted position when the door lock is closed, wherein the stopper spring is configured to bias the stopper against the locking detent.

14. The elevator according to claim 13, wherein opening of the lock activates the safety device via movement of the mechanical transmission member, thereby locking the elevator car into a fixed position.

15. A safety arrangement configured to form a safety space or safety spaces in an elevator at the base of an elevator hoistway and/or in the top part of the elevator hoistway, comprising:

a safety device; and

a mechanical transmission member connected to the safety device at a first end and to a lock of an elevator car at a second end,

wherein opening of the lock activates the safety device via movement of the mechanical transmission member, thereby locking the elevator car into a fixed position,

wherein the safety device is a spring-loaded tripping device rigidly fixed in the elevator hoistway and comprises;

a mounting base;

a locking detent mounted on the mounting base and configured to be moved along a single axis via a detent spring pressing against the locking detent;

a pin connected to the mounting base via a first hinge and connected to a transmission rod via a second hinge; and

a stopper comprising a stopper spring;

wherein the transmission rod is connected to the stopper via a third hinge,

wherein the mechanical transmission member is connected to the safety device at the locking detent at one end thereof, and

wherein the stopper rests against a surface of the locking detent in a retracted position when the door lock is closed, wherein the stopper spring is configured to bias the stopper against the locking detent.