JPS5921174Y2 - Elevator door abnormality alarm device - Google Patents

Description

[Detailed description of the invention] This invention relates to a device that warns of an abnormality in an elevator door.

It is well known that elevator car doors are opened and closed by electric motors.

While the car is running, the fully closed car door is urged in the door closing direction by the electric motor and held at the fully closed position.

However, recently, in residential elevators, etc., there have been cases where children or the like have pranked the car door from inside the car while the car is running.

If the car door is forced open even slightly, a gate switch installed on the car door will operate and the car will come to a sudden stop.

At this time, the car door is not mechanically locked and can be opened by applying a little force.

On the other hand, between floors, there is usually a gap of 15 to 20 cm between the car and the hoistway wall, so if the car happens to stop between floors, the passengers inside the car may There is a risk of the person pulling out from the shaft and falling into the hoistway through the above-mentioned gap.

To prevent this, attempts have been made to make the car door difficult to reach and to strengthen the closing force of the door, but this is not always perfect.

The purpose of this invention is to improve the above-mentioned problems, and to provide an elevator door abnormality warning device that warns passengers to stop when the car door is about to be opened while the car is running. shall be.

An embodiment of this invention will be described below with reference to FIG.

In the figure, (+X-) is a DC power supply, 1a is a running relay contact that opens when the car is stopped and closes when it is running, and 2a is a contact that opens when the car is in a section where the door can be opened and closed, and closes when there is no car. 3 is a door open detection contact such as a gate switch that opens when the car door is fully closed and closes when it opens even a little. 4 is an abnormality that issues a warning signal when energized. In the detection relay, 4a and 4b are its normally open contacts, 4
Similarly, C is a normally closed contact, 5 is a running control relay that enables the car to run when energized, and stops the car when deenergized; 6
This is a warning light installed inside the cage.

The car door is closed while the car is running, and the door open detection contact 3
is open.

Further, when the car is stopped within the door opening/closing area, the door opening/closing area detection relay contact 2a is open.

Therefore, during normal operation, the abnormality detection relay 4 is de-energized and the travel control relay 5 is energized.

When the car is currently running, the running relay contact 1a is closed.

Further, if the car is outside the door opening/closing area, the door opening/closing area detection contact 2a is also closed.

At this time, if a passenger in the car opens the car door even slightly, the door close detection contact 3 closes.

The abnormality detection relay 4 is now energized by the (+)-1a, 2a-3-4-(-) circuits and self-holds by closing the contact 4a.

Further, the contact point 4C is opened, the travel control relay 5 is deenergized, and the car is stopped.

Further, the contact point 4b is closed and the warning light 6 is turned on, warning the passengers to open the door slowly as it is dangerous.

When the passenger releases his/her hand from the car door, the contact 3 is opened, the abnormality detection relay 4 is deenergized, and the contact 4b is opened, so that the warning light 6 is turned off.

On the other hand, since the contact point 4C is closed, the travel control relay 5 is energized again, and the car can be restarted.

Therefore, passengers are not trapped inside the car unnecessarily.

In addition, when the car is stopped on the floor with the door closed, the door opening/closing area detection relay contact 2a and traveling relay contact 1 are activated.
Both a are open.

Therefore, even if the passenger slightly opens the car door and the contact 3 closes, the abnormality detection relay 4 is not energized and the warning light 6 is not turned on.

This is to prevent unnecessary lighting of the warning light 6, since even if the car door is opened, the car is stationary on the floor and there is no danger of passengers falling into the hoistway. be.

However, when the car stops between floors for some reason, the door opening/closable section detection relay contact 2a is closed.

Therefore, when the passenger slightly opens the car door and the contact point 3 closes, the abnormality detection relay 4 is energized and the warning light 6 is turned on.

FIG. 2 shows another embodiment of this invention, in which 4d is a normally open contact of the abnormality detection relay 4, and 7 is a contact 7 when energized.
This is an intermittent relay that opens and closes a at regular intervals.

The other parts are the same as those other than part II in FIG. When the abnormality detection relay 4 is energized and the contact 4d is closed, the intermittent relay 7 is energized and the contact 7a can be repeatedly opened and closed at a constant cycle.

As a result, the warning light 6 repeatedly blinks, giving a warning to the passengers in the car.

When the passenger releases his/her hand from the car door, the contact 4d is opened, the intermittent relay 7 is deenergized, and the contact 7a is opened.

Therefore, the warning light 6 goes out. Note that the warning light 6 may be one that emits colored light such as red or yellow.

FIG. 3 also shows another embodiment of this invention, in which 4e is a normally closed contact of the abnormality detection relay 4, and 6A is a car interior light provided inside the car.

The other parts are the same as those other than part II in FIG.

This embodiment does not provide a dedicated warning light 6 as described above,
This is a substitute for the indoor lighting lamp 6A.

That is, although the indoor lighting lamp 6A is always on, when the abnormality detection relay 4 is energized and the contact point 4e is opened, the indoor lighting lamp 6A is turned off and the inside of the car becomes dark.

When the passenger was surprised by this and let go of the car door, contact 4e
is closed, the interior lighting lamp 6A is turned on, and the inside of the car becomes bright.

If the passenger tries to open the car door again, the interior illumination light 6A goes out again, and when the passenger takes his hand off the car door, it turns on again.

Darkening the inside of the car has a strong psychological impact on passengers, and also realistically restricts their behavior, giving a sufficient warning effect.

Of course, it is also easy to blink the indoor lighting lamp 6A.

4 to 6 also show other embodiments of this invention.

In Figures 4 and 5, 11 is an elevator car, 12
The car room, 13 is the car door, 14 is the space between the front end of the car door 13 and the door stop of the car room 12 when it starts to open, and 15 is the door at human eye level near the door stop. When installed and lit at a position corresponding to
4 is a warning light that projects a flash of light, and 16 is an indicator light that is installed inside the car compartment 12 and indicates that it is dangerous if it is turned on, so please do not open the door.

In FIG. 6, 1b is a traveling relay contact that closes when the car is stopped and opens when the car is running, and 2b is a door opening/closable section detection relay contact similar to contact 2a.

The rest is the same as in FIG.

While the car 11 is running, the car door 13 is closed and the door open detection contact 3 is open, so the abnormality detection relay 4 is not energized and the warning light 15 is not lit.

Further, while the car 11 is running, the running relay contact 1b is open, and when the car 11 stops within the door opening/closing area, the door opening/closing area detection relay contact 2b is opened, so the indicator light 16 does not light up.

If the currently running car 11 stops outside the door opening/closing section for some reason, both the traveling relay contact 1b and the door opening/closing section detection relay contact 2b close.

With this, a circuit of (+)-1b-2b-16-H is formed, and the indicator light 16 lights up to display a message such as "please do not open the car door because it is dangerous" and to tell the passenger that the car door 13 is closed.
Warn you not to open it.

If a passenger ignores this warning and forces open the car door 13 even a little, the abnormality detection relay 4 is energized and the warning light 15 is turned on as described above.

The warning light 15 projects a flash into the passenger's eyes through the gap 14 between the car door 13 and the door stop to give a strong warning.

When the passenger who is surprised by this releases his hand from the car door 13, the warning light 15 goes out.

Next, when the passenger opens the door 13 of the car even slightly while the car 11 is running, the warning light 15 lights up as described above.

Furthermore, when the car door 13 is opened, other contacts (not shown) of the gate switch operate to bring the car 11 to a sudden stop.

When the car 11 stops outside the door opening/closing area, the indicator light 16 lights up as described above.

As explained above, with this invention, when the car is running or stops outside the area where the door can be opened, if the car door opens even a little, a warning signal is emitted and a visual warning is emitted, so passengers can In contrast, a warning is issued to prevent passengers from opening the door as it is dangerous, thereby preventing serious accidents such as passengers falling into the hoistway.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing one embodiment of the elevator door abnormality alarm system according to this invention, and Figs. 2 and 3 are circuit diagrams showing other embodiments of this invention, both of which are similar to Fig. 1. II
Figures 4 to 6 also show other embodiments of this invention; Figure 4 is a cross-sectional view of the car, Figure 5 is a front view of the car, and Figure 6 is a circuit diagram. be. 1a...Traveling relay contact, 2a...Relay contact outside the door opening/closing area, 3...Door open detection contact, 4...Abnormality detection relay, 6 ...warning light. In addition, the same parts or corresponding parts in the figures are indicated by the same reference numerals.

Claims (7)

[Scope of utility model registration request] (1) A door open detection contact that operates when the car door opens even slightly; a circuit that issues a warning signal when the door open detection contact operates while the car is running or when the car stops outside the area where the door can be opened; An abnormality warning device for an elevator door, comprising a light emitting body provided in the car and emitting a visual warning in response to the above-mentioned warning signal. (2) An abnormality warning device for an elevator door according to claim 1, which uses a warning light as a light emitting body and is turned on by a warning signal. (3) An abnormality warning device for an elevator door according to claim 2, which is a utility model and is configured to cause a warning light to blink in response to a warning signal. (4) An abnormality warning device for an elevator door according to claim 2 or 3 of the registered utility model claim, which uses a warning light that emits colored light. (5) An abnormality warning device for an elevator door according to claim 2, which uses a warning light that emits flashing light. (6) An abnormality warning device for an elevator door according to claim 1, which uses a car interior light as a light emitting body and is configured to be turned off by a warning signal. (7) An abnormality warning device for an elevator door according to claim 6 of the utility model registration, wherein the car interior lighting lamp is made to blink in response to a warning signal.