Safety locking device for a shaft door of an elevator and method for opening a shaft door of an elevator using a safety locking device
A safety locking device for a shaft door of an elevator and a method for opening the shaft door using the safety locking device involve a shaft door lock having: a first stopper stopping the shaft door at a closed first position wherein the lock locks the shaft door; an emergency release mechanism manually releasing the lock allowing movement in an opening direction; a second stopper stopping the shaft door at a semi-open second position between closed and open wherein the lock locks the shaft door; and at least one counter-stopper engaging with the first stopper to stop the shaft door at the first position and engaging with the second stopper to stop the shaft door at the second position.
1 . A safety locking device for locking a shaft door of an elevator, the safety locking device comprising:
a shaft door lock having a first stopper adapted to stop the shaft door at a first position corresponding to a closed configuration of the shaft door, the shaft door lock having a first locked configuration locking the shaft door at the first position;
an emergency release mechanism adapted to manually release the shaft door lock from the first locked configuration thereby allowing the shaft door to move from the first position in an opening direction to open the shaft door;
the shaft door lock having a second stopper adapted to stop the shaft door at a second position corresponding to a semi-open configuration of the shaft door, the semi-open configuration being positioned between the closed configuration and an open configuration of the shaft door, the shaft door lock having a second locked configuration locking the shaft door at the second position; and
the shaft door lock having at least one counter-stopper adapted to engage with the first stopper to stop the shaft door at the first position and to engage with the second stopper to stop the shaft door at the second position;
where the first and second stoppers are both attached to the shaft door or the first and second stoppers are both attached to a stationary door frame at the shaft door.
2 . The safety locking device according to claim 1 wherein the emergency release mechanism is adapted to manually release the shaft door lock from the second locked configuration thereby allowing the shaft door to move from the second position in the opening direction to open the shaft door to the open configuration.
3 . The safety locking device according to claim 1 wherein the at least one counter-stopper is a single counter-stopper adapted to engage with both the first stopper and the second stopper.
4 . The safety locking device according to claim 1 wherein the at least one counter-stopper includes a first counter-stopper adapted to engage with the first stopper to stop the shaft door at the first position and a second counter-stopper adapted to engage with the second stopper to stop the shaft door at the second position.
5 . The safety locking device according to claim 1 wherein the first stopper and the second stopper are attached to the shaft door and the at least one counter-stopper is attached to the stationary door frame at the shaft door.
6 . The safety locking device according to claim 1 wherein the first stopper and the second stopper are attached to the stationary door frame at the shaft door and the at least one counter-stopper is attached to the shaft door.
7 . The safety locking device according to claim 1 wherein the emergency release mechanism is adapted to retract the at least one counter-stopper from an extended counter-stopper position to a retracted counter-stopper position thereby releasing the at least one counter-stopper from the engagement with the first stopper or with the second stopper.
8 . The safety locking device according to claim 1 wherein the emergency release mechanism includes a first release element that retracts the first stopper from an extended stopper position to a retracted stopper position thereby releasing the first stopper from the engagement with the at least one counter-stopper.
9 . The safety locking device according to claim 8 wherein the emergency release mechanism includes a second release element that retracts the second stopper from an extended stopper position to a retracted stopper position thereby releasing the second stopper from the engagement with the at least one counter-stopper.
10 . The safety locking device according to claim 1 wherein when the shaft door is in the semi-open configuration, a semi-open opening width of the shaft door is at most half of a full-opening width of the shaft door in a fully open configuration.
11 . The safety locking device according to claim 1 wherein a semi-open opening width of the shaft door is in a range of 10 cm to 40 cm.
12 . The safety locking device according to claim 1 wherein the semi-open configuration of the shaft door is a one-side semi-open configuration or a two-side semi-open configuration.
13 . The safety locking device according to claim 1 wherein the emergency release mechanism is mechanically connected with at least one of the first stopper, the second stopper, and the at least one counter-stopper.
14 . A method for opening a shaft door of an elevator using the safety locking device according to claim 1 , the method comprising the steps of:
stopping the shaft door at a first position corresponding to a closed configuration of the shaft door by engaging the first stopper of the shaft door lock with the at least one counter-stopper;
manually releasing the shaft door lock in the closed configuration of the shaft door using the emergency release mechanism;
allowing the shaft door to move from the first position in an opening direction for opening the shaft door; and
stopping the shaft door at a second position corresponding to a semi-open configuration of the shaft door by engaging the second stopper of the shaft door lock with and the at least one counter-stopper.