JPS5913435B2 - Elevator landing locking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a locking device for an elevator hall.

Elevator landings are usually locked, and the IC on the landing side is generally provided with a keyhole that can be unlocked by specialized elevator maintenance personnel.

When an elevator malfunctions and a passenger is trapped in the car, the building manager uses a maintenance worker's key to open the landing and rescue the passenger.

However, the maintenance worker's key can unlock the landing even if the car is not stopped, so if someone other than a specialized maintenance worker unlocks the landing, he or she may accidentally fall into the hoistway. It is possible to do so.

This invention solves the above-mentioned drawbacks, and the rescue key can only unlock the landing where the car is stopped.
The purpose of the maintenance lock is to provide a locking device for an elevator hall that can unlock the hall regardless of the location of the car.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

In the figure, 1 is the floor of the landing, 2 is the landing entrance, 3 is the door of the landing consisting of a single sliding door, and 4 is the door of the landing consisting of a single sliding door.The middle part is pivoted to this, and a part extends horizontally and a hook 4a is provided at the end. The other part is a hook body having a hanging leg part 4b, 5 is an engaging element fixed to the edge of the doorway 2 and engages about 4aK, and 6 is arranged opposite to the leg part 4b and locks the landing door 3. 7 is a restriction release device consisting of an electromagnet attached to the back of the door 3 of the landing and placed below the keyhole 6; 8 is a restriction release device located at the upper end of the restriction release device 7; An unlocking restriction device consisting of a suction element with pivotally mounted parts, one end of which is provided with a blocking part 8a that extends upward and covers the lower half of the keyhole 6, and the other end of which extends downward. The lever portion is engaged by a tension coil spring 9 and biased counterclockwise in FIG.

Reference numeral 11 is an indicator light consisting of a lamp installed near the keyhole 6, and reference numeral 12 is a rescue key with a T-shaped cross section corresponding to the keyhole 6, which is kept by the building manager.

Reference numeral 13 denotes a maintenance key which is constructed in the same manner as the rescue key 12 and is formed into a tapered shape with a slope 13a at the tip.
Only professional elevator maintenance personnel have it.

14 is an elevator car, 14a is an entrance/exit of the car, 1
5a is the landing on the first floor consisting of the landing shown in Figure 1, and tsb
, i5c also have similar landings on the second and third floors,
16a is a car position detection device on the first floor consisting of a switch installed in the hoistway corresponding to the landing 15a on the first floor;
, 16c are similarly arranged car position detection devices on the second and third floors, 16'a to 16'c are normally open contacts of the car position detection devices 16a to 16c, respectively, and 17 are provided in the car 14. A cam arranged to correspond to each of the lever position detection devices 16a to 16c is used to detect the entrance/exit of the landing 2,
It has a length to press any one of the corresponding car position detection devices 16a to 16c when the car 14 is at a position where approximately half or more of the height of each car entrance/exit 14a overlaps with each other.

7a to 7c are landing areas 15a to 15c on the 1st to 3rd floors, respectively.
11a to llc are indicator lights located at landings 15a to 15c on the 1st to 3rd floors, respectively.
18 Normally closed contact of abnormality detection IJ l/-, which is deenergized when the elevator car 14 stops abnormally. (→ (to) is the power supply.

Now, if the car 14 stops abnormally and the stop position is near the landing 15b on the second floor, the contacts 18 will be closed, and the car position detection device 16b on the second floor will be pressed by the cam 17, so the contacts will close. 16'b is also closed.

Therefore, the restriction release device 7b on the second floor is energized by the circuit (→-18-16'b-7b-(to)), and (→
-18-16'b-11b-(c) The indicator light 11b on the second floor is turned on by the circuit (c).

As a result, the unlocking restricting device 8 on the second floor is attracted against the biasing force of the spring 9, and the blocking portion 8a is lowered.

Therefore, the rescue key 12 is inserted into the keyhole 6 of the landing 15b on the second floor.
If the hook body 4 is rotated in the horizontal direction by contacting the leg part 4b of the hook body 4, and the hook body 4 is rotated clockwise in FIG. The device can be unlocked.

When the door 3 of the landing 15b on the second floor is opened, the car 14 is stopped with the car entrance 14a1 and the landing entrance 2 overlapping each other by more than half in the height direction.

Therefore, even a building manager or the like who is not familiar with the structure of elevators can safely rescue passengers in the car 14.

Furthermore, since the indicator light 11b on the second floor is lit at this time, the stop device for the car 14 can be easily known.

Further, the restriction release device 7c of the landing 15c on the floor where the car 14 has not stopped abnormally, for example, the 3rd floor, is not energized.
The bar 8a of the floor unlocking restriction device 8 is held in the raised position.

Therefore, the rescue key 12 cannot be inserted into the keyhole 6 on the third floor, and the door cannot be unlocked.

This makes it possible to prevent accidents caused by the building manager accidentally opening the door 3 of the landing on the third floor.

However, after inserting the maintenance key 13 into the keyhole 6 on the third floor, the slope 1
By pushing down the unlocking restricting device 8 against the biasing force of the spring 9 using the locking mechanism 3a, the maintenance key 13 can be inserted as shown by the chain line in FIG.

This allows you to unlock landing 15c on the third floor.
Normal maintenance work etc. can be carried out.

In this way, by using the maintenance key 13, the landing can be unlocked at any floor regardless of the position of the car 14.

In short, only at landings where car 14 has stopped abnormally,
Since this lock can be unlocked using the rescue key 12,
When a passenger is trapped in the car 14, the building manager or the like can rescue the passenger safely and within a short time without waiting for the arrival of specialized maintenance personnel.

As explained above, the present invention provides an unlocking restriction device for the elevator hall lock, which allows unlocking operation using a maintenance key at any time, but disables unlocking operation using a rescue key. For the lock at the landing where the car has stopped, a restriction release device is energized to enable the lock to be unlocked using a rescue key.

As a result, maintenance personnel can use the maintenance key to unlock the landing area and perform maintenance work regardless of the car's stopping position, and if the car has abnormally stopped near an appropriate landing area, the rescue key χ
The boarding area where the car is stopped can be unlocked by the manager of the building where the car is stored.

This makes it possible to quickly and safely rescue passengers trapped inside the car.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of an elevator hall showing an embodiment of the elevator hall locking device according to the present invention, and FIG.
Figures 3 and 4 are side views of the key corresponding to the keyhole in Figure 1, respectively, Figure 5 is a sectional view taken along line v-v in Figures 3 and 4, FIG. 6 is a schematic cross-sectional view of the hoistway of the elevator corresponding to FIG. 1, and FIG. 1 is a main part electric circuit diagram corresponding to FIG. 1. 1... Floor of the landing, 2-... Landing entrance/exit,
4... Hook body, 5... Engagement element, 6...
...Keyhole, 7...Restriction release device, 8...
...Unlocking restriction device, 12...Rescue key, 13.
...Maintenance key, 14...Basket, '16a
~16c...Car position device, 17...
cam. Note that the same parts in the figures are indicated by the same reference numerals.

Claims (1)

[Claims] 1. A lock installed in each elevator landing that locks the elevator landing and can be unlocked from the landing side using at least two types of keys. When the elevator car is in a position corresponding to one of the landings. An operating car position detection device, which is provided in each of the above-mentioned landings and is always in an operating state, moves forward when in operation, and engages with the tip of a key other than a specific key among the above-mentioned keys, thereby inhibiting the unlocking operation. an unlocking restriction device that prevents unlocking of the key by a key other than the specific key, and an unlocking restriction device that is energized through the operation of the car position detection device and that corresponds to the position of the car. A locking device for an elevator hall equipped with a restriction release device that puts an unlocking restriction device into a non-operating state.