Access door arrangement of an elevator shaft

Abstract

An access door arrangement of an elevator shaft, wherein at least one elevator car is moving, includes a door lock, whereby in connection with the door lock a reset switch of an inspection mode resetting device is located, whereby the door lock has a lock part movable between a lock position and an open position and whereby the reset switch is integrated in said door lock to be operated by the movement of the movable lock part or a related movable part. This solution allows an easy resetting of the inspection mode of the elevator.

Claims

1. A pit access door arrangement of an elevator shaft of an elevator, in which at least one elevator car is moving, the pit access door arrangement comprising: a manually operated door lock provided on a pit access door; an inspection mode resetting device including a reset switch, said reset switch being operable to turn an elevator from an inspection mode to a normal operation mode, wherein the door lock has a lock part movable between a lock position in which the lock part locks the pit access door and an open position in which the lock part unlocks the pit access door such that the pit access door can be opened, in response to a manual operation of the manually operated door lock, and the reset switch is integrated in said door lock in such a manner that the reset switch is operated to turn the elevator from the inspection mode to the normal mode directly by the movement of the movable lock part or a part fixed on the movable lock part when the manually operated door lock is manually operated to mechanically cause the movable lock part to move from the open position to the lock position, wherein the pit access door arrangement is configured in such a manner that manually operating the door lock directly causes the movable lock part to move from the open position to the lock position to directly activate the reset switch, such that the reset switch is activated to turn the elevator from the inspection mode to the normal mode by only manually operating the door lock without further operations, and wherein the arrangement comprises an elevator control which is configured to decode a sequence of lock/opening moves of the lock part into a reset signal for the inspection mode of the elevator.

2. The arrangement according to claim 1, wherein the door lock includes a triangle key connected to the lock part.

3. The arrangement according to claim 1, wherein the lock part counter-acts with a sliding surface located in connection with a structure surrounding the access door, which sliding surface extends at least partly along the way of the lock part between its lock position and open position, whereby the switch is located in connection with the sliding surface.

4. The arrangement according to claim 3, wherein the sliding surface is covered by a cover element.

5. The arrangement according to claim 1, wherein the switch is fixed to the pit access door and is operated by an operating part connected to the lock part.

6. The arrangement according to claim 5, wherein switch comprises a pivoted lever which is actuated by the operating part of the lock part on its way between the open and lock position.

7. The arrangement according to claim 1, wherein in connection with the switch a second switch is located which issues a signal for a safety space arrangement for a reduced shaft pit/shaft top.

8. The arrangement according to claim 1, wherein the movement of the lock part into its lock position is prevented by a blocking mechanism in response to the pit access door being not closed.

9. The arrangement according to claim 1, wherein the door lock comprises a door contact, and an elevator control is configured to consider a signal of the reset switch dependent on a status of the door contact.

10. The arrangement according to claim 1, wherein the pit access door is a landing door of the elevator or an inspection hatch in the bottom of the elevator shaft.

11. An elevator comprising the arrangement according toclaim 1.

12. A method of using the pit access door arrangement according to claim 1 for resetting elevator control from inspection mode to normal operation mode, said method comprising the steps of: during inspection mode, turning an inspection switch in a pit inspection station from an inspection position to normal operation position; exiting a pit and closing a pit access door having a door lock connected with a reset switch for the inspection mode of the elevator; after closing the access door, operating manually the door lock in a given moving sequence to cause the reset switch to change its status according to the moving sequence of the door lock; reading the status of the reset switch; and turning the elevator from inspection mode to normal operation mode when the status of the reset switch changes according to the moving sequence.

13. The method according to claim 12, wherein the moving sequence is the movement of the door lock from lock position to open position within a given time period, causing the reset switch to change from a first status to a second status.

14. The method according to claim 13, wherein the moving sequence is the movement of the door lock from lock position to open position and back to lock position within a given time period, causing the reset switch to change from a first status to a second status and further back to the first status.

15. The method according to claim 12, wherein a door contact of the access door is observed on its open or lock position and the reset of the elevator into normal operation mode is allowed only when at the end of the moving sequence the door contact is in closed status.

16. The method according to claim 13, wherein the elevator is reset from inspection mode to normal operation mode when additionally a door contact changes, preferably together with the reset switch from a closed status to open status and back to closed status.

17. The method according to claim 12, wherein the reset of the inspection mode is only possible after any mechanical stopping device in the elevator shaft has been moved into its idle position for normal operation mode.

18. The arrangement according to claim 2, wherein the lock part counter-acts with a sliding surface located in connection with a structure surrounding the access door, which sliding surface extends at least partly along the way of the lock part between its lock position and open position, whereby the switch is located in connection with the sliding surface.

19. The arrangement according to claim 2, wherein the door lock comprises a door contact, and an elevator control is configured to consider a signal of the reset switch dependent on a status of the door contact, and the movement of the lock part into its lock position is prevented by a blocking mechanism in response to the pit access door being not closed, such that an inspection mode resetting is prevented when the pit access door is not closed.

20. The arrangement according to claim 1, wherein the reset switch includes a first switch being part of the inspection mode resetting device, and a second switch being part of a safety space device regarding operation of components in the elevator shaft, the lock part extends perpendicularly from a pivot axis thereof, and pivots, by manually operating the door lock, to engage with a sliding surface, and the part fixed on the movable lock part co-acts pivoted operating levers of both first and second switches, such that both switches are activated when the lock part is moved by manually operating the door lock from the open position to the lock position.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is hereinafter described by the aid of the schematic drawings in connection with embodiments of the invention.

(2) FIG. 1 shows a view on an inspection hatch of an elevator,

(3) FIG. 2 shows a detail of the door lock of the access hatch from FIG. 4,

(4) FIG. 3 shows a side view III of FIG. 2 and

(5) FIG. 4 shows a door lock with a lock latch being provided with a double switch.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(6) FIG. 1 shows an inspection hatch arrangement 10 wherein the access door to the elevator shaft is an inspection hatch 12, pivoted at an elevator shaft wall structure 14. The inspection hatch 12 has a door lock 16 which comprises a turnable lock latch 18 connected with a triangle key part 20 on the inspection hatch side and on the elevator shaft wall side a sliding surface 22 with a stopper 24 which defines the lock position 26 of the lock latch which is shown in FIG. 2 with dotted lines. The open position 25 of the lock latch is marked with a vertical dotted line.

(7) FIG. 2 shows in continuous lines the open position of the lock latch 18 wherein it extends vertically from its pivot axis 28. In the sliding surface 22, a pivoted switch element 30 of a reset switch extends from the sliding surface 22 as a ramp. When the lock latch 18 turns from its open position 25 into its lock position 26, it pushes the switch element 30 down which triggers the reset switch of the inspection mode resetting device which turns the elevator back to normal operation mode.

(8) FIG. 4 shows a second embodiment 40 of a door lock arrangement which is in this case an emergency unlocking device of a landing door, having a basis part 42 mounted to the access door or access hatch of the elevator shaft which basis part 42 carries via a support element 43 a double switch 44 with a reset switch 46 being part of the inspection mode resetting device and a second switch 48 being part of a safety space device regarding the operation of components in the elevator shaft to ensure a safety space when the dimensions of the shaft top or shaft pit are not sufficient to meet the international regulations. The emergency unlocking device 40 has a pivoted lock latch 50 which comprises a lock portion 52 extending perpendicular to the pivot axis 54 of the lock latch 50. This lock portion 52 grips behind a sliding surface as it is e.g. shown in FIGS. 2 and 3. Connected to the movable lock latch 50 is an operating part 56 co-acting with pivoted operating levers 58 of both switches 46, 48. Via this means, both switches 46, 48 are operated when the lock latch 50 is moved via the triangle key (FIG. 1) from its open position into its lock position.

(9) The invention is not limited to the described embodiments but may be varied within the scope of the appended patent claims.

LIST OF REFERENCE NUMBERS

(10) 10 inspection hatch arrangement 12 inspection hatch 14 elevator shaft wall structure 16 door lock 18 lock latch 20 triangle key part 22 sliding surface 24 stopper 25 open position 26 lock position 28 pivot axis 30 pivoted switch element 40 door lock arrangement 42 basis part 43 support element 44 double switch 46 reset switch 48 second switch 50 lock latch 52 lock portion 54 pivot axis 56 operating part 58 operating levers of the switches