JPS6124294B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to improvements in elevator safety devices.

In automatically operated elevators, especially residential elevators, children may play by getting into the car when it arrives at the elevator. In this case, there are the following dangers:

(a) Elevator doors begin to close automatically after a certain amount of time has passed since they were opened. At this time, the child in the car hurriedly tries to get out to the boarding area and falls over, injuring himself.

(b) When the above-mentioned door starts to close, if you touch the door safety switch (a well-known switch installed on the front edge of the door that activates when touched), the door will flip open. If you keep holding onto the door, your hand will get caught in the door bag and you will get injured.

(c) Once the door has been closed, it will continue to close unless there is a call from another floor, and the child will be temporarily trapped in the cage, giving the child a great sense of fear.

(d) In the case of (c), if there is a call from another floor, the car will run, but if something breaks down at this time, the child will be completely trapped. Moreover, since they are children, they are unable to communicate with the outside world, and out of fear they may try to open the car door and get out, putting them at risk of falling into the hoistway.

The present invention aims to improve the above-mentioned problems and to provide a safety device for an elevator that can prevent accidents by detecting when a child accidentally gets into a car.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In Figure 1, 1 is the elevator landing, 2 is the door of the landing, 3 is the car, 4 is the car entrance, and 5 is the low position of the car entrance 4, for example, a position of about 30 cm from the floor of car 3. 6 is a high position entrance/exit detector which is also installed about 1.5 meters from the floor, and 7 is a car door.

In Fig. 2, + and - are DC power supplies, 5a is a contact that closes when the light beam of the low-position entry/exit detector 5 is blocked;
Similarly, 6a is a contact of the high position entry/exit detector 6, 8a is a car call registration relay contact that opens when the first floor destination button (not shown) on the car operation panel is pressed and a first floor car call is registered, and 8b ~8d is also 2
Car call registration relay contacts on floors to 4th floor, 9 is unattended detection relay, 9a, 9b are normally open contacts, 10a
A time relay for setting the door opening time is energized while the cage 3 is running, is deenergized after a certain period of time has passed after the door has been opened after stopping, and is energized again when a travel command is issued and the brake is released. normally open contact, 1
0b and 10c are normally closed contacts, 11 is a brake release command relay contact that closes when the brake is restraining a hoisting motor (not shown) and opens when the motor is released, and 12 is a low position entry/exit detection relay. 12a and 12b are the normally open contacts, 13 is the high position entry/exit detection relay, 13a is the normally open contact, 13b is the normally closed contact, 14 is the reset button installed in the manager's room, and 15 is the child mischief detector. 15a and 15b are normally open contacts, 15c is also a normally closed contact, 16 is a door control relay that issues a door close command when energized and a door open command when deenergized, and 17 is a boarding detection relay. An alarm device such as a bell or a buzzer is installed on top of the car 3, and 18 is an alarm device also installed in the manager's room.

Next, the operation of this embodiment will be explained.

If a child is playing at landing 1 on the third floor and presses a landing button (not shown) as a prank, a landing call for the third floor will be registered. At this time, if car 3 is unattended and waiting with the door closed on the 1st floor, none of the destination buttons for the 1st to 4th floors have been pressed, and car call registration relay contacts 8a to 8d are all closed. Therefore, the unattended detection relay 9 is energized, and the contacts 9a,
9b is closed. When the car 3 starts running in response to a call for the third floor landing, the time relay contact 10a for setting the door opening time is closed, so the unoccupied detection relay 9 is self-held. In addition, the contacts 10b, 10
c is open.

When car 3 arrives at the third floor, the door opens, but since there are no passengers inside car 3 at this time, there is no opportunity to warn the child, and it is quite conceivable that the child will get into car 3. When a child enters the car 3 through the car doorway 4, only the light beam of the low-position entry/exit detector 5 is blocked, and the contact 5a is closed. At this time, since the car 3 is stopped, the brake is restraining the hoisting motor, the brake release command relay contact 11 is closed, and the +-11-5a-
The low position entry/exit detection relay 12 is energized by the circuit 12--, and self-holds by closing the contact 12a. In addition, since contact 12b is also closed, +-9b
-12b-13b-14-15- In the circuit of -12b-13b-14-15-,
The child tamper entry detection relay 15 is energized and self-maintains by closing the contact 15a. Further, the contact 15b is also closed, and the contact 15c is opened. When the door opening setting time expires, the time relay contact 10a opens and the contact 10b closes, but since the contact 15c is open, the door control relay 16 is not energized and the doors 2 and 7 are closed. do not come. In addition, contact 10c
Since also closes, +-15b-10c-17,1
In the circuit 8--, alarms 17 and 18 sound,
Not only does it inform the surrounding people that only the child is playing in the basket 3, but also informs the manager so that he or she can immediately give attention to the child and eliminate the dangerous situation. After removing the child from the car 3 and confirming that the dangerous situation has been resolved, the caretaker presses the reset button 14, which deenergizes the child tampering detection relay 15 and opens the contact 15b. Alarms 17 and 18 stop sounding. Also, contact 1
Since 5c is closed, +-10b-15c-16
- The door control relay 16 is energized by the - circuit, and the doors 2 and 7 are closed as usual. If car 3 starts in response to another call, brake release command relay contact 1
1 is opened, and the low position entry/exit detection relay 12 is deenergized. In addition, time relay contact 1 for setting door opening time
0a is also opened, and the unattended detection relay 9 is also deenergized.

Next, if there is already a passenger in car 3 that arrived at the third floor due to a child's landing call, any of the car call registration relay contacts 8a to 8d are open, so the unoccupied detection relay 9 is deenergized, and contact 9b is open. Therefore, even if the low position entry/exit detection relay 12 is energized and the contact 12b is closed when a child gets in, the child tampering entry detection relay 15 is not energized.
However, in this case, since adults are already on board, they can warn children about getting on board, so there is no danger.

Furthermore, when a child gets on board, if an adult also gets on board, the light beam from the high-position entry/exit detector 6 will be blocked, and the contact point 6a will be closed, +-11-6a-13-
- The high position entry/exit detection relay 13 is energized by the circuit indicated by -, and self-holds by closing the contact 13a. However, since the contact 13b is open, the child tampering boarding detection relay 15 is not energized. In this case, too, there is no danger because an adult is present.

FIG. 3 shows another embodiment of the invention.

In the figure, 10d is a normally closed contact of a time relay for setting the door opening time similar to the contact 10b, 15d is a normally open contact of the child tampering boarding detection relay 15, 20 is an intercom device installed in the car 3, and 21 is an intercom device installed in the manager's room.

When the child nuisance boarding detection relay 15 is energized by a child getting on the vehicle, the contact 15d is closed. When the time limit relay contact 10d for setting the door opening time is closed, the intercom devices 20 and 21 in the car and in the manager's room are automatically connected. Therefore, since the voice of the child in the car 3 can be heard in the caretaker's room, the caretaker knows that the child is getting into the car 3 as a prank, and can warn the child.

In the embodiment, low position and high position entrance/exit detectors 5,
Although two detectors (6) are provided, it goes without saying that more detectors may be provided.

In addition, as explained above, when a child tampering with the vehicle is detected, the door cannot be closed, but door controls such as opening the door for a longer period of time or closing doors 2 and 7 for a short time, then reversing and reopening the door may be implemented. This can also be easily implemented.

Furthermore, to return to normal operation, the caretaker presses the reset button 14, but when a car call is registered, the child tampering boarding detection relay 15 is deenergized and the car returns to normal operation. It is also easy to do.

As explained above, this invention provides entry/exit detectors at the low and high positions of the car entrance and exit, and when the low position detector operates when no destination button in the car is operated, a child may be tampered with boarding. Since the system detects this, prevents the door from closing, and notifies the outside of the car that the car has been tampered with, it is possible to prevent accidents caused by children tampering with the car.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional side view of an elevator landing and car showing an embodiment of an elevator safety device according to the present invention, FIG. 2 is a circuit diagram of FIG. 1, and FIG. 3 is a diagram showing another embodiment of the invention. It is an intercom circuit diagram. 3...Car, 4...Car entrance/exit, 5...Low position entry/exit detector, 5a...Same left contact, 6...High position entry/exit detector, 6a...Same left contact, 8a-8d...1
Floor to 4th floor car call registration relay contact, 9...Unmanned detection relay, 12...Low position entry/exit detection relay, 13
...High position entry/exit detection relay, 15...Child mischief entry detection relay, 16...Door control relay, 17
...Alarm installed in the car, 18...Alarm installed in the manager's room.

Claims (1)

[Claims] 1. An unoccupied detection circuit that detects that no destination button in the car has been operated; an entrance/exit detector installed at a low position and a high position of the entrance/exit of the car to detect a person passing through the entrance/exit; A safety device for an elevator comprising a child tampering entry detection circuit which prevents the entrance/exit door from being closed when only the lower one of the entry/exit detectors operates when the circuit is operating.