JPS627657Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lamp check circuit for a hall lantern in an elevator.

In group-controlled elevators, the hall lanterns installed on each floor play an important role. Therefore, it is necessary to easily detect a burnt-out lamp in a hall lantern.

However, in order to detect a burnt-out lamp in a conventional hall lantern, there is a method of checking whether the hall lantern installed on each floor is lit from the hall side, and a method of installing an electric light emitter 5 and a switch 4 in the hall lantern circuit as shown in Figure 1. A lamp burnout detection circuit 6 is inserted, and when the closing contact 1 for ascending is open, the switch 4 is closed, and the relay contact 2-1 for each floor is connected.
By manually forcibly closing 2-2 and 2-3 one by one, the elevator machine can detect whether or not the lamps of the hall lanterns 3-1, 3-2, and 3-3 are burnt out based on whether or not the lamp 5 is emitting light. There is a method to find the hall lantern in the room, but the former has the disadvantage of requiring a lot of time for inspection, and in both the former and the latter, in the circuit that lights the hall lantern using two lamps, only one of the two lamps is used. One drawback was that it was difficult to find a broken lamp bulb.

The purpose of this invention is to eliminate the above-mentioned drawbacks of the prior art and provide an inexpensive lamp check circuit for elevator hall lanterns that can easily detect broken lamps in the elevator machine room in a minimum amount of inspection time. It's about doing.

The key points of this invention are that a terminal block is provided between the hall lantern and the lighting relay contact, and on the other hand, multiple resistors are connected in series between the power supply, and a terminal block is connected between these resistors, and only when checking for a burnt out bulb. The main feature is that a detection circuit is provided that includes a check bar connected to the terminal block and a voltmeter that measures the voltage between the check bar and one side of the power source.

The present invention will now be described with reference to the embodiments shown in the drawings.

In Fig. 2, 7 is a relay contact for lighting the ascending hall lanterns 9 installed on each floor from the 1st floor (1F) to the Nth floor (NF), and 8 is the connection between the relay contact 7 in the elevator machine room and the hall lantern 9. 10 is a ball breakage detection circuit 14 and a terminal block 8.
11 is a voltmeter, 12,1
3 is a voltage dividing resistor, and A and B are power supplies.

In the above configuration, the rising hall lantern 9
- Detection of burnout when there is only one lamp on 1F will be explained. The internal resistance of lamp 9-1F is R
9. Assuming that the voltage dividing resistors 12 and 13 are R ₁₂ and R ₁₃ and the power supply voltage is V _AB , the voltage V appearing on the voltmeter 11 is V
= V _AB × R ₁₃ × R ₉ / (R ₁₃ + R ₉ ) / (R + (R ₁₃ ×
R ₉ /(R ₁₃ + R ₉ ))). For example, R ₉ = R ₁₂ =
When R ₁₃ =1, V=V _AB ×1/3. At this time, if the lamp 9-1F is broken and R ₉ =∞, then V = V _AB ×1/2. Also, relay contact 7
When -1F is closed, V=V _AB regardless of whether the lamp 9-1F is broken or not. As mentioned above, according to the voltmeter's instruction, if V = V _AB , it is found that the relay contact 7-1F for lighting the hall lantern lamp is closed, so it is not possible to detect the lamp burnout, and V = V If it is _AB x 1/2, you can tell that it is a broken hole lantern lamp. Also, V=V
If _AB x 1/3, you can see that the lamp is not broken. Therefore, lamp breakage can be easily detected in the elevator machine room with minimal inspection time.

Next, to explain the case where there are two hall lantern lamps, when hall lantern lamps 9-1F and 9'-1F are connected in parallel as shown in Fig. 3, when both lamps are not broken, The voltage appearing on the voltmeter is V = V _AB × 1/(1/R ₁₃ +1/
R ₉ +1/R ₉ ′)/(R ₁₂ +(1/(1/R ₁₃ +1/
R ₉ +1/R ₉ ′))) For example, R ₁₂ = R ₁₃ = R ₉
When = R ₉ ' = 1, V = V _AB × 1/4, and when either lamp 9 or 9' burns out, V = V _AB × 1/3, and both lamps burn out. At the time of disconnection, V=V _AB ×1/2. Also, relay contact 7
It is also easy to see that when the circuit is closed, V=V _AB , and it is impossible to detect a burnout of the lamp bulb. Furthermore, even if the number of lamps in the hall lantern increases to three or four, it is possible to detect burnt out lamps in the same way. Figure 4 shows a circuit in which a resistor 15 is inserted into the lamp burnout detection circuit 14 in Figure 2. If this resistance value is selected appropriately, the current flowing through the hall lantern will be reduced, making it possible to prevent it from emitting light. It is possible, and there is no need to make the customers waiting in the hall aware of the lamp check. Figure 5 shows the voltmeter 11
The voltages V _AB , 1/2V _AB , 1/3V _AB , and 1/4V _AB detected by the check rod 10 are compared to the voltages set through the resistor 16 from the power supply voltage V _AB by comparing them to the voltages 17a and 17b. .

This invention has the effect of being able to quickly detect a broken lamp in a hall lantern in the elevator machine room when the elevator is in operation, not only when one lamp is used, but also when multiple lamps are in use. be.

[Brief explanation of the drawing]

Fig. 1 is a conventional lamp burnout detection circuit, Fig. 2 is a circuit diagram showing an embodiment of this invention, and Fig. 3 is a circuit diagram showing an embodiment of this invention.
4 and 5 are circuit diagrams showing other embodiments of this invention. 1...Closing contact for rising, 2-1 to 3...Relay contact for each floor, 3-1 to 3...Hall lantern lamp, 4...Switch, 5...Electroluminescent body, 6
...Lamp bulb burnout detection circuit, 7-1~N...Relay contact for hall lantern lighting, 8-1~N...Connection terminal block, 9,9'-1~N...Hall lantern lamp, 10... Check rod, 11...Voltmeter,
12, 13... Voltage dividing resistor, 14... Lamp burnout detection circuit, 15... Lamp current limiting resistor, 16...
...Voltage setting low resistor, 17a-d...Voltage comparator, 1
8a-d...Light emitting diode, A, B...Power supply.

Claims (1)

[Scope of utility model registration request] A hall lantern and a circuit provided in an elevator machine room and connected in series to a power supply with a circuit for each floor, between the hall lantern and the lighting relay contact. A terminal block is provided, and on the other hand, a plurality of resistors are connected in series between the power supplies, a check bar is connected between these resistors and is connected to the terminal block only when checking for a broken bulb, and the check bar is connected to the power supply. A lamp check circuit for an elevator hall lantern, characterized in that it is provided with a detection circuit equipped with a voltmeter for measuring the voltage between the two sides.